JB/T 3644.2-1999 Technical requirements for horizontal multi-spindle automatic lathes
Some standard content:
ICS25.080.10
Machinery Industry Standard of the People's Republic of China
JB/T3644.2-1999
Technical Conditions for Horizontal Multi-spindle Automatic Lathes
Published on 1999-05-20
State Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T3644.2—1999
This standard is a revision of JBn4321-86 "Technical Requirements for Manufacturing and Acceptance of Multi-spindle Automatic Lathes". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content remained unchanged. This standard is a concretization and supplement of GB/T9061-1988 "General Technical Conditions for Metal Cutting Machine Tools" and other standards. This standard is part of the JB/T3644 "Horizontal Multi-spindle Automatic Lathe" series of standards, which includes the following two parts: JB/T3644.1-1999 Accuracy Inspection of Horizontal Multi-spindle Automatic Lathe JB/T3644.2-1999 Technical Conditions for Horizontal Multi-spindle Automatic Lathe This standard replaces JBn4321-86 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Automatic Lathe Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard is Shenyang Automatic Lathe Research Institute. This standard was first issued in November 1986. 1
1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Horizontal Multi-spindle Automatic Lathes
JB/T3644.2—1999
Replaces JBn4321-86
This standard specifies the manufacturing and acceptance requirements for horizontal multi-spindle automatic lathes used for processing bars and chucks. This standard is applicable to general-purpose horizontal multi-spindle automatic lathes. 2 Cited 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 valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T5226.1—199
GB/T 9061—1988
GB/T17421.1—1998
JB/T3644.1—1999
JB/T9872—1999
JB/T9874—1999
JB/T10051—1999
3 General requirements
Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for metal cutting machine tools||tt ||General rules for machine tool inspection Part 1: Geometric accuracy of machine tools under no-load or finishing conditions Accuracy inspection of horizontal multi-axis automatic lathes
Metal cutting machine tools, general technical conditions for machined parts General technical conditions for metal cutting machine tool assembly General technical conditions for hydraulic systems of metal cutting machine tools When accepting machine tools according to this standard, the remaining acceptance items in GB/T9061, JB/T9872, JB/T9874 and other standards that are not specified in this standard must be inspected at the same time.
4 Accessories and tools
The accessories and tools listed in Table 1 should be supplied randomly. Table 1
Cutting tool
Fixed bracket
Tool bracket
Exchange gear
Special tool
Clamping workpiece
Machining workpiece
Cutting workpiece
Attachment and tool bar
Tool spindle
Selection of speed and feed rate
Adjustment of machine tool
Spindle approved by the State Machinery Industry Bureau on May 20, 1999 Number 6
Number of spindles 8
Single index
Double index
Varieties and quantities are provided according to order agreement
Specifications and quantities are determined by the manufacturer
2000-01-01 implementation
JB/T3644.2—1999
4.2 Special accessories to expand the performance of machine tools and accessories, exchange gears, and cam plates used for processing specific parts are supplied according to user agreements. 5 Processing and assembly quality
5.1 The main shaft drum of important castings should be aged after rough machining. 5.2 The longitudinal tool holder, transverse tool holder, guide rail pair, and the circular guide surface of the spindle drum and the front box are important guide rail pairs, and the following wear-resistant measures should be taken: a) Quenching treatment of the longitudinal tool holder body and guide rail plate; b) Induction heating annealing treatment or other wear-resistant measures for the circular guide rail surface of the spindle drum body; c) Wear-resistant cast iron is used for the circular guide rail surface of the front box body. 5.3 The following joint surfaces are assessed according to the requirements of "important fixed joint surfaces": a) Joint surface between the front box body and the bed;
b) Joint surface between the gearbox body and the bed body:
c) Joint surface between the crossbeam and the front box body or the gearbox body: d) Joint surface between the transverse tool holder body and the bed body or the front box body: e) Joint surface between the longitudinal tool holder guide rail plate and the crossbeam: f Fixed joint surface of the pressure plate
The above joint surfaces should fit tightly, and no insertion should be made when checking with a 0.04mm feeler gauge before and after tightening. 5.4 After the spindle drum assembly is assembled, the spindle should be tested for operation. The spindle should be operated at high speed until the temperature is stable. The temperature and temperature rise of the front and rear bearings of the spindle should not exceed the following regulations: temperature, 65℃, temperature rise value, 35℃. 5.5 The high-speed rotating spindle components should be tested for balance and correction. 5.6 The machine tool parts should be clean during the assembly process, and the cleanliness should comply with the relevant standards. 5.7 V tape drive, the length of a group of tapes should be basically the same, and there should be no obvious pulsation during transmission. 5.8 The hydraulic, pneumatic, lubrication, cooling systems and other parts of the machine tool shall not leak, and the coolant shall not be mixed into the hydraulic system and lubrication system. Oil and water shall not enter the electrical system. This test should be carried out at the same time as the continuous idling test. 5.9 The electrical system of the machine tool shall comply with the provisions of GB/T5226.1. 6 Safety and Health
6.1 There should be no abnormal screaming and irregular impact sound when the machine tool is running. When running at any speed, the sound pressure level of the whole machine noise shall not exceed 85dB (A).
6.2 Heavy parts and components should be ensured to be safely hoisted and installed, and hoisting holes or lifting rings should be provided when necessary. 6.3 Machine tools that use pneumatic, hydraulic and electromagnetic clamping should stop automatically immediately when the pressure change exceeds the specified value or the power of the electromagnetic mechanism is interrupted, and the clamping capacity should not be lost. Otherwise, reliable protective devices must be provided. 6.4 Parts and components on the machine tool that may come loose must be equipped with anti-loosening devices. Exposed rotating parts, such as gears, pulleys, grinding wheels, etc., should have protective devices.
6.5 The safety of the hydraulic system of the machine tool should comply with the requirements of JB/T10051. 6.6 The safety of the electrical system of the machine tool should comply with the requirements of GB/T5226.1. 2
7 Operation test
JB/T3644.2—1999
The operation test includes adjustment test, idling test and continuous idling test. 7.1 Adjustment test
Use the button switch or the joystick to conduct adjustment test on the machine tool to test its flexibility of action and reliability of function. 7.1.1 Select a spindle speed and conduct operation test of spindle start, forward rotation and stop, and conduct continuous action for no less than 10 times. 7.1.2 Use the inching to conduct adjustment test of the tool holder's feed and rapid stroke, and the reliability and accuracy test of the tool holder's automatic stop position, and conduct continuous action for no less than 10 times. bZxz.net
7.1.3 Use the inching and hand crank to conduct the spindle drum forward and reverse indexing test, and conduct no less than 10 complete cycles each. 7.1.4 Install the bar rack and the machine tool for online operation test (spot check). 7.1.5 The spring collet or chuck should be tested for clamping materials to check the accuracy and reliability of the collet or chuck in loading and unloading workpieces. 7.1.6 The lubrication system should generally have a device for observing the oil supply and an oil mark indicating the oil level. The lubrication system should be well lubricated and the cooling system should be fully cooled.
7.1.7 The chip conveyor device should be tested for operation. 7.1.8 The accessories that are connected to the machine tool for operation should be tested on the machine tool, and their mutual relationship should meet the design requirements. There should be no interference between accessories and between accessories and the machine tool. 7.1.9 Repeat the inspection of each electrical switch, operating handle, periodic stop, and no-material stop for no less than 10 times. 7.1.10 Inspect the convenience, flexibility and reliability of loading and unloading of tools and accessories. 7.2 Idle operation test
7.2.1 Idle running test of main motion mechanism
Under the non-cutting running state, test the temperature change and no-load power of the spindle during operation, and record it according to Table 2. The machine tool spindle starts from low speed and runs at three speeds of low, medium and high, and each level is not less than 10 minutes. The highest speed should be run for a sufficient time (not less than 1h) to allow the spindle bearing to reach a stable temperature. When the spindle bearing reaches a stable temperature, check the temperature and temperature rise of the spindle bearing. When the bearing is a rolling bearing, its value shall not exceed the following provisions:
Temperature, 70℃: temperature rise value, 40℃.
No-load power includes driving the tool holder to work and feed, and is not greater than 40% of the rated power (excluding the no-load consumption of the motor and the instantaneous power of the spindle drum indexing).
Temperature ℃
Measurement time
h or min
Spindle speed
Spindle bearing
Main drive
Main drive feed
7.2.2 Continuous idle running test
JB/T3644.2—1999
Conduct a continuous idle running test of the whole machine in a simulated working state. The spindle speed is 2/3 of the maximum speed, the cycle time is 1/3 of the longest cycle time (specified in the instructions), and the continuous running time is not less than 8h. 8 Machine tool load test
8.1 Load test includes:
a) Test of the maximum torque of the machine tool main drive system: b) Test of the machine tool main drive system exceeding the maximum torque by 25% for a short time: c) Test of the maximum cutting main component force of the machine tool; d) Test of exceeding the maximum cutting main component force by 25% for a short time; e) Test of the machine tool main drive system reaching maximum power. The following tests are to be carried out in batch production:
a) 2/3 maximum torque test of the machine tool main transmission system: b) 2/3 maximum cutting main force test of the machine tool. 8.2 Load test method:
a) For the maximum torque and 2/3 maximum torque tests, one tool holder can be selected to test each spindle separately: b) For the maximum cutting main force and 2/3 maximum cutting main force tests, each tool holder should be used to test each spindle separately; c) For the maximum power cutting test, each tool holder should be allowed to participate in the cutting at the same time, and the total power consumed by the main motor should be close to its rated value, and the difference between the two should not be greater than 15% of the rated power of the motor.
8.3 The tests can be combined or tested individually. 8.4 The cutting process of each test should be carried out continuously, and the machine tool should not be stopped to adjust the machine tool in the middle, otherwise the cutting should be carried out again. During the test, all mechanisms of the machine tool should work normally. There should be no slipping of the pulley or friction clutch, obvious deceleration or gear shifting, obvious vibration or burning on the test piece surface, and abnormal operation of the electrical and hydraulic systems. 9
Machine tool accuracy inspection
9.1 The machine tool accuracy inspection shall be carried out in accordance with JB/T3644.1. 9.2 The provisions for applying the force F in the spindle rotation accuracy inspection G1, G4, and G5 are as follows: No force is applied when the spindle bearing has an axial preload: When there is no axial preload, the recommended force F is equal to 0.3~1 times the weight of the spindle assembly. 9.3 During the machine tool accuracy inspection, the outer circle and the end face are finely turned in the working state, and the maximum allowable value of the profile arithmetic mean deviation R of the surface roughness of the test piece is 3.2um.
9.4 The accuracy inspection of the tool support or fixed support shall be carried out in accordance with Table 3. The inspection shall be carried out after the spindle bearing reaches a stable temperature after medium-speed operation. 4
Note: The size range is the same as that of JB/T3644.1-1999. Table 3
Test items
Parallelism of tool support hole axis
on the moving
of the longitudinal force frame at 100 measuring length
line:
a vertical plane
b horizontal plane
Coincidence of tool support hole axis
line on the main shaft axis:
a vertical plane
b horizontal plane
Size range
Indicator
Test rod
Indicator
Test rod
Test method
Refer to the relevant provisions of GB/T17421.1-1998. Tightly insert a test rod into the tool support hole. The indicator is fixed on the machine tool (such as the spindle) so that its probe touches the surface of the inspection rod. Move the longitudinal tool holder to inspect in the vertical plane and in the horizontal plane.
Turn the inspection rod 180° and inspect again. Calculate the errors a and b separately. The error is calculated as half of the algebraic sum of the two indicator measurement results.
Each tool holder needs to be inspected
Insert a inspection rod tightly into the tool holder hole. The indicator is installed on the end of the spindle so that its probe touches the surface of the inspection rod. Rotate the spindle and inspect in the vertical plane and in the horizontal plane.
Calculate the errors a and b separately. The error is calculated as half of the difference in the indicator readings.
Move the tool holder to point B and inspect again in the same way. Each tool holder needs to be inspected
JB/T3644.2-
Republic
Mechanical Industry Standard
Technical Conditions for Horizontal Multi-spindle Automatic Lathes
JB/T364421999
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Print Sheet X/X Number of words XXX,XXX
Format 880×1230
First edition in XxX, 1999
First printing in XX, 1999
Print number 1-500
Price XXXXX Yuan
X99-2051-1999. Table 3
Inspection items
Parallelism of tool support hole axis
on the moving axis of the longitudinal force frame at 100 measuring length
:
a vertical plane
b horizontal plane
Coincidence of tool support hole axis
on the axis of the spindle:
a vertical plane
b horizontal plane
Size range
Indicator
Inspection rod
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998. Insert a test rod tightly into the hole of the tool support. The indicator is fixed on the machine tool (such as the spindle) so that its probe touches the surface of the test rod. Move the longitudinal tool holder and inspect in the vertical plane and in the horizontal plane.
Turn the inspection rod 180° and inspect again. Calculate the errors a and b separately. The error is calculated as half of the algebraic sum of the two indicator measurement results.
Each tool holder needs to be inspected
Insert a test rod tightly into the tool holder hole. The indicator is installed at the end of the spindle so that its probe touches the surface of the inspection rod. Rotate the spindle and inspect in the vertical plane and in the horizontal plane.
Calculate the errors a and b separately. The error is calculated as half of the difference in the indicator readings.
Move the tool holder to point B and inspect again in the same way. Each tool holder needs to be inspected
JB/T3644.2-
Republic
Mechanical Industry Standard
Technical Conditions for Horizontal Multi-spindle Automatic Lathes
JB/T364421999
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Print Sheet X/X Number of words XXX,XXX
Format 880×1230
First edition in XxX, 1999
First printing in XX, 1999
Print number 1-500
Price XXXXX Yuan
X99-2051-1999. Table 3
Inspection items
Parallelism of tool support hole axis
on the moving axis of the longitudinal force frame at 100 measuring length
:
a vertical plane
b horizontal plane
Coincidence of tool support hole axis
on the axis of the spindle:
a vertical plane
b horizontal plane
Size range
Indicator
Inspection rod
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998. Insert a test rod tightly into the hole of the tool support. The indicator is fixed on the machine tool (such as the spindle) so that its probe touches the surface of the test rod. Move the longitudinal tool holder and inspect in the vertical plane and in the horizontal plane.
Turn the inspection rod 180° and inspect again. Calculate the errors a and b separately. The error is calculated as half of the algebraic sum of the two indicator measurement results.
Each tool holder needs to be inspected
Insert a test rod tightly into the tool holder hole. The indicator is installed at the end of the spindle so that its probe touches the surface of the inspection rod. Rotate the spindle and inspect in the vertical plane and in the horizontal plane.
Calculate the errors a and b separately. The error is calculated as half of the difference in the indicator readings.
Move the tool holder to point B and inspect again in the same way. Each tool holder needs to be inspected
JB/T3644.2-
Republic
Mechanical Industry Standard
Technical Conditions for Horizontal Multi-spindle Automatic Lathes
JB/T364421999
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Print Sheet X/X Number of words XXX,XXX
Format 880×1230
First edition in XxX, 1999
First printing in XX, 1999
Print number 1-500
Price XXXXX Yuan
X99-205
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