JB/T 7914-1999 Description method of equipment characteristics of vibration generator auxiliary table
Some standard content:
ICS17.160
Machinery Industry Standard of the People's Republic of China
JB/T7914-1999
eqvISo60701981
Auxiliary tables for vibration generators
Methods of describing equipment characteristics
Auxiliary tables for vibration generatorsMethods of describing equipment characteristicsPublished on 1999-06-28
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T7914—1999
This standard is equivalent to ISO6070—1981 "Methods of describing equipment characteristics of auxiliary tables for vibration generators". This standard is a revision of JB/T7914-—95 "Methods of describing equipment characteristics of auxiliary tables for vibration generators". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard replaces JB/T7914-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Mechanical Vibration and Shock Standardization. The responsible drafting unit of this standard is Beijing Institute of Automation of Mechanical Industry. The main drafters of this standard are Zhu Xiaomin and Huang Chongling. 1 Scope
Mechanical Industry Standard of the People's Republic of China
Auxiliary tables for vibration generators-Methods of describing equipment characteristics
Auxiliary tables for vibration generators-Methods of describing equipment characteristics This standard specifies the methods for describing the characteristics and classification of auxiliary tables for vibration generators. JB/T 7914-1999
eqvISO6070:1981
Replaces JB/T7914-95
This standard applies to auxiliary tables connected to one or more vibration generators. The vibration generator moves in a direction parallel to the longitudinal axis of the auxiliary table, and the auxiliary table with a horizontal table surface is the most common. If there is a way to eliminate the influence of gravity, the auxiliary table can vibrate in any direction.
This standard provides a relatively detailed description of several auxiliary tables. It stipulates the method of describing the characteristics of auxiliary tables. It also serves as a guide for the contract between the manufacturer and the user of such equipment. The types of auxiliary tables specified in this standard are as follows: a) Leaf spring type:
b) Oil film or air cushion type;
c) Mechanical sliding type:
d) Ball, roller, needle roller bearing type:
e) Hydraulic sliding type:
Hydrostatic bearing type:
g) Magnetic suspension type;
h) Dry bearing type with hydrostatic compensation:
i) Combination of two or more of the above types. This standard stipulates three levels of description of the characteristics of test equipment: a) Class A;
b) Class B;
e) Class C.
The characteristic items described at each level are generally determined according to the purpose that the user wants to achieve by using the equipment, and do not involve the quality and size of the auxiliary table.
For some description levels, the characteristics not specified in the table can be determined by negotiation between the manufacturer and the user. However, at least the description of Class A characteristics should be included in the manufacturer's technical documents.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are approved by the State Machinery Industry Bureau on June 28, 1999 and implemented on January 1, 2000
JB/T 7914—1999
are all valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. JB/7406.3--1994 Testing machine terminology Vibration table and impact table 3 Symbols
α Overturning angle (see Figure 2)
β Tilt angle (see Figure 2)
Industrial deflection angle (see Figure 2)
C. Maximum overturning moment
C. Maximum roll moment
C, maximum deflection moment
d, total harmonic distortion of acceleration
F, force to overcome static friction measured in Z direction (including values under various test loads and various positions of the slide along the longitudinal axis B as much as possible)
F, force F to overcome dynamic friction measured in the axis B, maximum static load
Fx, Fy, F, maximum force that the moving auxiliary table can withstand along the three axis directions, factory frequency
fa, highest working frequency
fi, lowest working frequency
x, 1, 1, moment of inertia of the slide in the axis direction through the center of gravity of the table and parallel to the reference axes, Kx, Ky, K, translational stiffness of the guide system along the three axis directions, K, Kg, K. The rotational stiffness m of the guide system along the three axis directions The total mass m of the slide including the moving parts of the guide system, the test load (subscript 1 is 0, 1, 2, 3, 4, 5) Vz Rated speed along the B axis Effective value
Xc, Yc, Zc Coordinates of the center of the work table (see Figure 2) Xa, Y., Zo Coordinates of the center of gravity of the table
4 Units
When the manufacturer or user determines the values of the parameters in this standard, the legal measurement unit system should be used. At the same time, it is stated whether these parameters are expressed in effective values, peak values or peak-to-peak values. 5 Definition of auxiliary table
The terminology of vibration table and impact table can be found in JB/T7406.3. The auxiliary table is a mechanical system that transmits the vibration generated by one or more vibration generators to the test device. The guide system of the auxiliary table is compatible with the guide system of the vibration table. The auxiliary table is composed of the following parts (see Figure 1): a) Slide table composed of work table and connector (connecting work table and vibrator): 2
b) Guide system;
c) Leveling pad
JB/T7914-1999
1-Vibration generator; 2-Suspension system of vibration generator (free or locked); 3-Connector; 4-1Work table: 5-Slide table guide system: 6-Leveling pad: 7-Base plate: 8-Base Figure 1 Typical structure diagram of auxiliary table connected with a single vibration generator 5.1 Classification of auxiliary tables
5.1.1 Leaf spring table: The slide table and the fixed part of the guide system are connected with metal plates. The leaf spring has low stiffness along the slide table direction and high stiffness in the other five degrees of freedom directions.
5.1.2 Oil film or air cushion table: The slide table is placed on a flat plate. To reduce the friction coefficient, the surface between the slide and the plate is separated by an oil film or air cushion (for this type of table, the connection stiffness between the slide and the fixed part of the guide system cannot be determined) 5.1.3 Mechanical slide: The slide is connected to the fixed part of the guide system by a connecting rod and a slider mechanism. Its longitudinal stiffness is very low. If there is no gap, the stiffness of the remaining degrees of freedom is very high. 5.1.4 Ball, roller or needle bearing table: The principle is the same as that of the mechanical plate slide, but the reduction of friction is achieved by balls, rollers or needles.
5.1.5 Hydraulic slide: The principle is the same as that of the mechanical slide, but the lubrication is achieved under pressure. For very small lateral linear displacements or rotational displacements, its stiffness can be determined. 5.1.6 Hydrostatic bearing table: The connection between the slide and the fixed part of the guide system is achieved by hydraulic pressure, which can ensure the automatic centering of the system. The longitudinal connection stiffness can be ignored, and the stiffness corresponding to the other degrees of freedom can be given. 5.1.7 Magnetic suspension table: The connection between the slide and the fixed part of the guide system is achieved by a magnetic field. The magnetic field gradient determines the stiffness. There is no actual contact between the sliding planes. Longitudinal stiffness and friction can be neglected, and the stiffness corresponding to the other degrees of freedom can be given. 5.1.8 Dry support table with static pressure compensation: The connection between the slide and the fixed part of the guide system is achieved by the contact of two materials with a small friction coefficient. The fluid pressure outside the contact surface ensures automatic adjustment and compensation of the gap. The longitudinal stiffness is very low, and the stiffness corresponding to the other degrees of freedom 3
can be given.
5.2 Coordinate axis system
5.2.1 Slide reference coordinate axis system
JB/T7914-1999
The characteristic dimensions of the slide are determined according to the directions of the axes that constitute the slide reference axis system (see Figure 2). The origin O of the reference axis system is the intersection of the end face of the slide drive surface and the horizontal axis of the vibration generator. The OZ axis is the longitudinal axis (parallel to the direction of motion generated by the vibration generator and pointing from point O to the free end). The OX axis is the normal axis (perpendicular to the slide plane and pointing to the load). The OY axis is the transverse axis (orthogonal to the OX and OZ axes). In the case of several vibration generators connected to the slide, one of the reference axis systems of the slide can be selected. The motion is determined with respect to the fixed axis system (OX, OY, OZ), the axes of which are parallel to the axes of the slide reference axis system. Table
Connector
Figure 2 Slide table reference axis system
5.2.2 Other reference coordinate axis systems for slide table
For special purposes, other axis systems whose axes are parallel to the slide table reference axis system and whose origins are determined by the device (such as the center of gravity, the center of the mounting surface, etc.) can be specified.
5.3 Characteristic parameters
5.3.1 Effective stroke: The limit stroke of normal operation of the slide table. After exceeding this stroke, the manufacturer no longer guarantees its performance. 5.3.2 Rated frequency range: The upper and lower limits of the frequency f. Within this range, the slide table can work normally. Beyond this frequency range, the manufacturer no longer guarantees its performance.
5.3.3 Rated speed root mean square value V: The maximum root mean square value of the speed along the Z axis that the slide table can continuously work under the selected load within the rated frequency range.
5.3.4 Maximum static load F: The maximum static load that can be borne without damaging the slide table. 5.3.5 Maximum axial force Fx, Fy, Fz: The maximum static force and maximum dynamic force that can be applied along the three axis directions under the condition that the auxiliary platform is not damaged.
5.3.6 Maximum overturning moment C.: The overturning limit moment generated by the static force and dynamic force applied under the condition that the auxiliary platform is not damaged.
JB/T7914-1999
5.3.7 Maximum roll moment Ce: The roll limit moment generated by the static force and dynamic force applied under the condition that the auxiliary platform is not damaged.
5.3.8 Maximum deflection moment C.: The deflection limit moment generated by the static force and dynamic force applied under the condition that the auxiliary platform is not damaged.
5.3.9 Transmissibility: The dimensionless ratio of the system response amplitude to the excitation amplitude under steady-state forced vibration. It can be the ratio of force, displacement velocity or acceleration.
5.3.10 Acceleration total harmonic distortion d: For the output signal, the expression is as follows: d =
Where: A, — the value of the fundamental wave of the signal;
VA, +A, +A+A
VA+A+A+A+A
A.-A — respectively the value of the 2nd and nth harmonic components of the signal. x100%
5.3.11 Environmental limitations: The limitations of environmental conditions such as temperature and humidity are limited to ensure normal continuous operation. A continuous test (such as 3h) can be carried out at the selected test load m and rated speed, and the temperature near the guide system is measured to check whether the thermal influence caused is too large to determine the limit of the ambient temperature. 6 Test load m
The auxiliary platform test should be carried out using the test load recommended in this standard or any other load agreed upon by the manufacturer and the user. In order to make the natural mode of the system (including the test load and other connectors between the workbench) outside the rated frequency range, the following principles must be followed:
a) Use end nails to tighten at all fastening points to ensure that the connection has sufficient rigidity and prevent loosening or sliding; b) Pay attention to whether the contact surface of the test load and the workbench surface fit (such as flatness, etc.); c) Use a test load with a small relative height. The recommended ratio of the height to diameter or height to diagonal of the test load should be ≤0.4. Note: If the manufacturer and the user agree, an offset load can be used. In this case, the load value and fixing method should be specified. 6.1 Test load m: The mass of the auxiliary table itself, without additional mass. 6.2 Test load m,: Under the sine state, a load with an acceleration peak of 400m/s is allowed. 6.3 Test load mz: Under the sine state, a load with an acceleration peak of 100m/s is allowed. 6.4 Test load m: Under the sine state, a load with an acceleration peak of 40m/s2 is allowed. 6.5 Test load m: Under sinusoidal state, the load allows 10m/s* acceleration peak. 6.6 Test load m: Under sinusoidal state, the load allows 200m/s acceleration peak. Note: Test load ms is used only when the increase of 400m/s increases with the capacity of the over-vibration generator and the test load m cannot be used. This standard requires the provision of data using test load m; at the option of the manufacturer, data when using test load m can be provided, but when changing, a superscript 5 must be added to the symbols of all these data, and it must be noted in the data record: use load m instead of m to draw the user's attention. 7 Characteristics provided by the manufacturer
7.1 Common characteristics of various auxiliary tables (see Table 1)5
Physical and mechanical properties:
JB/T 79141999
Total mass of the slide including the moving parts of the guide system mDimensions of the positive table
Coordinates of the center of mass G of the submerged table
Coordinates of the center C of the working table (see Figure 2)Dimensions of the fixed point and the same torque on the tableStraightness and flatness of the table surface
Flatness of the coupling surface
Overall dimensions of the auxiliary table
Maximum static load F,
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the X-axis ()
Slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the Y-axis Moment of inertia of axes parallel to axis B (1)
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to axis B (4)
Working characteristics:
Rated rate range
Effective stroke bZxz.net
Stroke of the limiter
Maximum no-load acceleration of point C (along the Z axis) Maximum axial force F,
T. Acceleration uniformity of the working surface along the X axis Acceleration uniformity of the working surface along the Y axis Acceleration uniformity of the working surface along the Z axis No-load next order frequency
Derived rotation
No-load angular acceleration of point C about the X axis Speed
No-load angular acceleration of point C around Y axis
No-load angular acceleration of point C around Z axis
Negative load acceleration of point C around X axis
Load angular acceleration of point C around Y axis
Refer to corresponding chapter
Description level
Negative angular acceleration of point C around Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Total mass of the auxiliary table
Suspension state of the vibration generator (free or locked) Working position (horizontal or vertical)|| tt||JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of connectors
Connection requirements between vibration generator and auxiliary tableDetails of installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description level2 Rated frequency range: The upper and lower limits f of the frequency. The slide can work normally within this range. Beyond this frequency range, the manufacturer no longer guarantees its performance.
5.3.3 Rated speed root mean square value V: The maximum root mean square value of the speed along the Z axis that the slide can work continuously under the selected load within the rated frequency range.
5.3.4 Maximum static load F: The maximum static load that can be borne without damaging the slide. 5.3.5 Maximum axial force Fx, Fy, Fz: The maximum static force and maximum dynamic force that can be applied along the three axis directions without damaging the auxiliary table.
5.3.6 Maximum overturning moment C.: The overturning limit moment generated by the static force and dynamic force applied without damaging the auxiliary table.
JB/T7914-1999
5.3.7 Maximum roll moment Ce: The roll limit moment generated by the static force and dynamic force applied without damage to the auxiliary platform.
5.3.8 Maximum deflection moment C: The deflection limit moment generated by the static force and dynamic force applied without damage to the auxiliary platform.
5.3.9 Transmissibility: The dimensionless ratio of the system response amplitude to the excitation amplitude under steady-state forced vibration. It can be the ratio of force, displacement velocity or acceleration.
5.3.10 Acceleration total harmonic distortion d: For the output signal, the expression is as follows: d =
Where: A, — the value of the fundamental wave of the signal;
VA, +A, +A+A
VA+A+A+A+A
A.-A — respectively the value of the 2nd and nth harmonic components of the signal. x100%
5.3.11 Environmental limitations: The limitations of environmental conditions such as temperature and humidity are limited to ensure normal continuous operation. A continuous test (such as 3h) can be carried out at the selected test load m and rated speed, and the temperature near the guide system is measured to check whether the thermal influence caused is too large to determine the limit of the ambient temperature. 6 Test load m
The auxiliary platform test should be carried out using the test load recommended in this standard or any other load agreed upon by the manufacturer and the user. In order to make the natural mode of the system (including the test load and other connectors between the workbench) outside the rated frequency range, the following principles must be followed:
a) Use end nails to tighten at all fastening points to ensure that the connection has sufficient rigidity and prevent loosening or sliding; b) Pay attention to whether the contact surface of the test load and the workbench surface fit (such as flatness, etc.); c) Use a test load with a small relative height. The recommended ratio of the height to diameter or height to diagonal of the test load should be ≤0.4. Note: If the manufacturer and the user agree, an offset load can be used. In this case, the load value and fixing method should be specified. 6.1 Test load m: The mass of the auxiliary table itself, without additional mass. 6.2 Test load m,: Under the sine state, a load with an acceleration peak of 400m/s is allowed. 6.3 Test load mz: Under the sine state, a load with an acceleration peak of 100m/s is allowed. 6.4 Test load m: Under the sine state, a load with an acceleration peak of 40m/s2 is allowed. 6.5 Test load m: Under sinusoidal state, the load allows 10m/s* acceleration peak. 6.6 Test load m: Under sinusoidal state, the load allows 200m/s acceleration peak. Note: Test load ms is used only when the increase of 400m/s increases with the capacity of the alarm generator and the test load m cannot be used. This standard requires the provision of data using test load m; at the option of the manufacturer, data when using test load m can be provided, but when changing, a superscript 5 must be added to the symbols of all these data, and it must be noted in the data record: use load m instead of m to draw the user's attention. 7 Characteristics provided by the manufacturer
7.1 Common characteristics of various auxiliary tables (see Table 1)5
Physical and mechanical properties:
JB/T 79141999
Total mass of the slide including the moving parts of the guide system mDimensions of the positive table
Coordinates of the center of mass G of the submerged table
Coordinates of the center C of the working table (see Figure 2)Dimensions of the fixed point and the same torque on the tableStraightness and flatness of the table surface
Flatness of the coupling surface
Overall dimensions of the auxiliary table
Maximum static load F,
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the X-axis ()
Slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the Y-axis Moment of inertia of axes parallel to axis B (1)
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to axis B (4)
Working characteristics:
Rated rate range
Effective stroke
Stroke of the limiter
Maximum no-load acceleration of point C (along the Z axis) Maximum axial force F,
T. Acceleration uniformity of the working surface along the X axis Acceleration uniformity of the working surface along the Y axis Acceleration uniformity of the working surface along the Z axis No-load next order frequency
Derived rotation
No-load angular acceleration of point C about the X axis Speed
No-load angular acceleration of point C around Y axis
No-load angular acceleration of point C around Z axis
Negative load acceleration of point C around X axis
Load angular acceleration of point C around Y axis
Refer to corresponding chapter
Description level
Negative angular acceleration of point C around Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Total mass of the auxiliary table
Suspension state of the vibration generator (free or locked) Working position (horizontal or vertical)|| tt||JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of connectors
Connection requirements between vibration generator and auxiliary tableDetails of installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description level2 Rated frequency range: The upper and lower limits f of the frequency. The slide can work normally within this range. Beyond this frequency range, the manufacturer no longer guarantees its performance.
5.3.3 Rated speed root mean square value V: The maximum root mean square value of the speed along the Z axis that the slide can work continuously under the selected load within the rated frequency range.
5.3.4 Maximum static load F: The maximum static load that can be borne without damaging the slide. 5.3.5 Maximum axial force Fx, Fy, Fz: The maximum static force and maximum dynamic force that can be applied along the three axis directions without damaging the auxiliary table.
5.3.6 Maximum overturning moment C.: The overturning limit moment generated by the static force and dynamic force applied without damaging the auxiliary table.
JB/T7914-1999
5.3.7 Maximum roll moment Ce: The roll limit moment generated by the static force and dynamic force applied without damage to the auxiliary platform.
5.3.8 Maximum deflection moment C: The deflection limit moment generated by the static force and dynamic force applied without damage to the auxiliary platform.
5.3.9 Transmissibility: The dimensionless ratio of the system response amplitude to the excitation amplitude under steady-state forced vibration. It can be the ratio of force, displacement velocity or acceleration.
5.3.10 Acceleration total harmonic distortion d: For the output signal, the expression is as follows: d =
Where: A, — the value of the fundamental wave of the signal;
VA, +A, +A+A
VA+A+A+A+A
A.-A — respectively the values of the 2nd and nth harmonic components of the signal. x100%
5.3.11 Environmental limitations: The limitations of environmental conditions such as temperature and humidity are limited to ensure normal continuous operation. A continuous test (such as 3h) can be carried out at the selected test load m and rated speed, and the temperature near the guide system is measured to check whether the thermal influence caused is too large to determine the limit of the ambient temperature. 6 Test load m
The auxiliary platform test should be carried out using the test load recommended in this standard or any other load agreed upon by the manufacturer and the user. In order to make the natural mode of the system (including the test load and other connectors between the workbench) outside the rated frequency range, the following principles must be followed:
a) Use end nails to tighten at all fastening points to ensure that the connection has sufficient rigidity and prevent loosening or sliding; b) Pay attention to whether the contact surface of the test load and the workbench surface fit (such as flatness, etc.); c) Use a test load with a small relative height. The recommended ratio of the height to diameter or height to diagonal of the test load should be ≤0.4. Note: If the manufacturer and the user agree, an offset load can be used. In this case, the load value and fixing method should be specified. 6.1 Test load m: The mass of the auxiliary table itself, without additional mass. 6.2 Test load m,: Under the sine state, a load with an acceleration peak of 400m/s is allowed. 6.3 Test load mz: Under the sine state, a load with an acceleration peak of 100m/s is allowed. 6.4 Test load m: Under the sine state, a load with an acceleration peak of 40m/s2 is allowed. 6.5 Test load m: Under sinusoidal state, the load allows 10m/s* acceleration peak. 6.6 Test load m: Under sinusoidal state, the load allows 200m/s acceleration peak. Note: Test load ms is used only when the increase of 400m/s increases with the capacity of the alarm generator and the test load m cannot be used. This standard requires the provision of data using test load m; at the option of the manufacturer, data when using test load m can be provided, but when changing, a superscript 5 must be added to the symbols of all these data, and it must be noted in the data record: use load m instead of m to draw the user's attention. 7 Characteristics provided by the manufacturer
7.1 Common characteristics of various auxiliary tables (see Table 1)5
Physical and mechanical properties:
JB/T 79141999
Total mass of the slide including the moving parts of the guide system mDimensions of the positive table
Coordinates of the center of mass G of the submerged table
Coordinates of the center C of the working table (see Figure 2)Dimensions of the fixed point and the same torque on the tableStraightness and flatness of the table surface
Flatness of the coupling surface
Overall dimensions of the auxiliary table
Maximum static load F,
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the X-axis ()
Slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the Y-axis Moment of inertia of axes parallel to axis B (1)
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to axis B (4)
Working characteristics:
Rated rate range
Effective stroke
Stroke of the limiter
Maximum no-load acceleration of point C (along the Z axis) Maximum axial force F,
T. Acceleration uniformity of the working surface along the X axis Acceleration uniformity of the working surface along the Y axis Acceleration uniformity of the working surface along the Z axis No-load next order frequency
Derived rotation
No-load angular acceleration of point C about the X axis Speed
No-load angular acceleration of point C around Y axis
No-load angular acceleration of point C around Z axis
Negative load acceleration of point C around X axis
Load angular acceleration of point C around Y axis
Refer to corresponding chapter
Description level
Negative angular acceleration of point C around Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Total mass of the auxiliary table
Suspension state of the vibration generator (free or locked) Working position (horizontal or vertical)|| tt||JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of connectors
Connection requirements between vibration generator and auxiliary tableDetails of installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description level11 Environmental limitations: Environmental conditions such as temperature and humidity are limited to ensure normal continuous operation. A continuous test (such as 3h) can be carried out at the selected test load m and rated speed, and the temperature near the guide system is measured to check whether the thermal influence caused is too large to determine the limit of the ambient temperature. 6 Test load m
The auxiliary table test should be carried out with the test load recommended in this standard or any other load agreed upon by the manufacturer and the user. In order to make the natural mode of the system (including the test load and other connectors between the workbench) outside the rated frequency range, the following principles must be followed:
a) Use end nails to tighten at all fastening points to ensure that the connection has sufficient rigidity and prevent loosening or sliding; b) Pay attention to whether the contact surface of the test load and the workbench surface are in contact (such as flatness, etc.); c) Use a test load with a small relative height. The recommended ratio of the height to the diameter or the height to the diagonal of the test load should be ≤0.4. Note: If the manufacturer and the user agree, an offset load may be used. In this case, the load value and fixing method shall be specified. 6.1 Test load m: The mass of the auxiliary table itself, without additional mass. 6.2 Test load m,: A load that allows a peak acceleration of 400m/s under sinusoidal conditions. 6.3 Test load mz: A load that allows a peak acceleration of 100m/s under sinusoidal conditions. 6.4 Test load m: A load that allows a peak acceleration of 40m/s2 under sinusoidal conditions. 6.5 Test load m: A load that allows a peak acceleration of 10m/s* under sinusoidal conditions. 6.6 Test load m: A load that allows a peak acceleration of 200m/s under sinusoidal conditions. Note: Test load ms is used only when the 400m/s increment cannot be achieved with the test load m due to the capacity of the over-actuator generator. This standard requires the provision of data using the test load m,; at the option of the manufacturer, data using the test load m, may be provided, but when the replacement is made, a superscript 5 must be added to the symbols of all these data, and a note must be made on the data record: use load m, instead of m, to draw the user's attention. 7 Characteristics provided by the manufacturer
7.1 Common characteristics of various auxiliary tables (see Table 1) 5
Physical and mechanical properties:
JB/T 79141999
Total mass of the slide including the moving parts of the guide system mDimensions of the positive table
Coordinates of the center of mass G of the submerged table
Coordinates of the center C of the working table (see Figure 2)Dimensions of the fixed point and the same torque on the tableStraightness and flatness of the table surface
Flatness of the coupling surface
Overall dimensions of the auxiliary table
Maximum static load F,
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the X-axis ()
Slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the Y-axis Moment of inertia of axes parallel to axis B (1)
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to axis B (4)
Working characteristics:
Rated rate range
Effective stroke
Stroke of the limiter
Maximum no-load acceleration of point C (along the Z axis) Maximum axial force F,
T. Acceleration uniformity of the working surface along the X axis Acceleration uniformity of the working surface along the Y axis Acceleration uniformity of the working surface along the Z axis No-load next order frequency
Derived rotation
No-load angular acceleration of point C about the X axis Speed
No-load angular acceleration of point C around Y axis
No-load angular acceleration of point C around Z axis
Negative load acceleration of point C around X axis
Load angular acceleration of point C around Y axis
Refer to corresponding chapter
Description level
Negative angular acceleration of point C around Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Total mass of the auxiliary table
Suspension state of the vibration generator (free or locked) Working position (horizontal or vertical)|| tt||JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of connectors
Connection requirements between vibration generator and auxiliary tableDetails of installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description level11 Environmental limitations: Environmental conditions such as temperature and humidity are limited to ensure normal continuous operation. A continuous test (such as 3h) can be carried out at the selected test load m and rated speed, and the temperature near the guide system is measured to check whether the thermal influence caused is too large to determine the limit of the ambient temperature. 6 Test load m
The auxiliary table test should be carried out with the test load recommended in this standard or any other load agreed upon by the manufacturer and the user. In order to make the natural mode of the system (including the test load and other connectors between the workbench) outside the rated frequency range, the following principles must be followed:
a) Use end nails to tighten at all fastening points to ensure that the connection has sufficient rigidity and prevent loosening or sliding; b) Pay attention to whether the contact surface of the test load and the workbench surface are in contact (such as flatness, etc.); c) Use a test load with a small relative height. The recommended ratio of the height to the diameter or the height to the diagonal of the test load should be ≤0.4. Note: If the manufacturer and the user agree, an offset load may be used. In this case, the load value and fixing method shall be specified. 6.1 Test load m: The mass of the auxiliary table itself, without additional mass. 6.2 Test load m,: A load that allows a peak acceleration of 400m/s under sinusoidal conditions. 6.3 Test load mz: A load that allows a peak acceleration of 100m/s under sinusoidal conditions. 6.4 Test load m: A load that allows a peak acceleration of 40m/s2 under sinusoidal conditions. 6.5 Test load m: A load that allows a peak acceleration of 10m/s* under sinusoidal conditions. 6.6 Test load m: A load that allows a peak acceleration of 200m/s under sinusoidal conditions. Note: Test load ms is used only when the 400m/s increment cannot be achieved with the test load m due to the capacity of the over-actuator generator. This standard requires the provision of data using the test load m,; at the option of the manufacturer, data using the test load m, may be provided, but when the replacement is made, a superscript 5 must be added to the symbols of all these data, and a note must be made on the data record: use load m, instead of m, to draw the user's attention. 7 Characteristics provided by the manufacturer
7.1 Common characteristics of various auxiliary tables (see Table 1) 5
Physical and mechanical properties:
JB/T 79141999
Total mass of the slide including the moving parts of the guide system mDimensions of the positive table
Coordinates of the center of mass G of the submerged table
Coordinates of the center C of the working table (see Figure 2)Dimensions of the fixed point and the same torque on the tableStraightness and flatness of the table surface
Flatness of the coupling surface
Overall dimensions of the auxiliary table
Maximum static load F,
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the X-axis ()
Slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to the Y-axis Moment of inertia of axes parallel to axis B (1)
Moment of inertia of the slide including the moving parts of the guide system relative to the axis passing through its center of mass and parallel to axis B (4)
Working characteristics:
Rated rate range
Effective stroke
Stroke of the limiter
Maximum no-load acceleration of point C (along the Z axis) Maximum axial force F,
T. Acceleration uniformity of the working surface along the X axis Acceleration uniformity of the working surface along the Y axis Acceleration uniformity of the working surface along the Z axis No-load next order frequency
Derived rotation
No-load angular acceleration of point C about the X axis Speed
No-load angular acceleration of point C around Y axis
No-load angular acceleration of point C around Z axis
Negative load acceleration of point C around X axis
Load angular acceleration of point C around Y axis
Refer to corresponding chapter
Description level
Negative angular acceleration of point C around Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Total mass of the auxiliary table
Suspension state of the vibration generator (free or locked) Working position (horizontal or vertical)|| tt||JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of connectors
Connection requirements between vibration generator and auxiliary tableDetails of installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description levelAcceleration uniformity of the working surface along the X axisUniformity of the acceleration of the working surface along the Y axisUniformity of the acceleration of the working surface along the Z axisUnder no loadThe first order frequency
Derived rotation
Unloaded angular acceleration of point C around the X axis
Unloaded angular acceleration of point C around the Y axis
Unloaded angular acceleration of point C around the Z axis
Loaded negative acceleration of point C around the X axis
Loaded angular acceleration of point C around the Y axis
Reference to the corresponding article
Description level
Negative angular acceleration of point C around the Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OMaximum temperature of the table
Installation requirements:
Auxiliary Total mass of the table
Suspension state of the vibration generator (free or locked)Working position (horizontal or vertical)
JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of the connector
Connection requirements between the vibration generator and the auxiliary tableDetails of the installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Contamination caused by the auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description levelAcceleration uniformity of the working surface along the X axisUniformity of the acceleration of the working surface along the Y axisUniformity of the acceleration of the working surface along the Z axisUnder no loadThe first order frequency
Derived rotation
Unloaded angular acceleration of point C around the X axis
Unloaded angular acceleration of point C around the Y axis
Unloaded angular acceleration of point C around the Z axis
Loaded negative acceleration of point C around the X axis
Loaded angular acceleration of point C around the Y axis
Reference to the corresponding article
Description level
Negative angular acceleration of point C around the Z axis1
Total harmonic distortion
Acceleration transmission rate between point C and point OHighest temperature of the table
Installation requirements:
Auxiliary Total mass of the table
Suspension state of the vibration generator (free or locked)Working position (horizontal or vertical)
JB/T7914—1999
Table 1 (end)
Extreme environmental conditions that the auxiliary table may withstand (temperature, humidity, etc.)Safety installation
Requirements for installation and operation (such as water, power supply, lifting equipment)Mechanical properties of the connector
Connection requirements between the vibration generator and the auxiliary tableDetails of the installation (see Figure 1)
Leveling pads
Installation tolerance
Maximum load for loading and unloading
Foundation base plate
Pollution caused by the auxiliary table (such as oil)
Environmental limits
1) For each test load.
7.2 Plate platform characteristics (see Table 2)
Set speed V
Maximum lateral force F
Maximum overturning moment C
Dynamic stiffness K of the guide system along the X axis
Translational stiffness K of the guide system along the Y axis,
Translational stiffness K of the guide system along the Z axis,
Rotational stiffness K of the guide system along the X axis,
Rotational stiffness K of the guide system along the Y axis. Rotational stiffness K of the guide system along the Z axis.
Refer to the corresponding article
Refer to the corresponding article
Description level
Description level
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.