This standard specifies the geometric accuracy inspection, processing inspection and CNC axis positioning accuracy and repeat positioning accuracy inspection of general purpose and conventional precision electric discharge machines (EDM) with reference to GB/T 17421.1 and GB/T 17421.2. This standard also specifies the tolerance values ​​corresponding to the above inspections. This standard is applicable to single-column machine tools of cross table type and fixed table type. This standard only involves the inspection of machine tool accuracy, and is not suitable for the inspection of machine tool operation tests (vibration, abnormal noise, creep of parts, etc.) or its parameters (such as speed, feed rate, etc.), which should usually be carried out before the accuracy inspection. This standard also specifies the terms used for the main components of the machine tool and names the coordinate axes with reference to ISO 841. GB/T 5291.1-2001 Accuracy inspection of electric discharge machines Part 1: Single-column machine tools (cross table type and fixed table type) GB/T5291.1-2001 Standard download decompression password: www.bzxz.net

GB/T 5291.1—2001
This standard is equivalent to ISO11090-1:1998 "Test conditions, terminology and precision test for machine tool EDM (EDM) Part 1: Single column machine tool (cross table type and fixed table type)", and the writing rules are basically the same. The differences between this standard and ISO11090-1:1998 are as follows: 1) The standard writing format is in accordance with GB/T1.1 "Guidelines for standardization work Unit 1: Rules for drafting and expressing standards Part 1: Basic provisions for standard writing";
2) The standard name is written according to Chinese practice and is basically consistent with IS011090-1:1998; 3) The repeated content in ISO11090-1 is deleted. 4) Item G7, add 5.3.2.3 in the inspection step column to make it consistent with the inspection status of related inspection items. The previous version of this standard is GB/T5291-1985. The important technical contents of this standard and the previous version have changed as follows: 1) The name of the standard has been changed to "Precision Inspection of Electric Spark Forming Machine Part 1: Single-column Machine Tools (Cross Table Type and Fixed Table Type); the standard number has been changed to GB/T5291.1; 2) The scope of application of the standard has been expanded;
3) The "Reference Standard" chapter has been added;
4) The "Explanation of Terms" chapter of the previous version has been changed to the "Definition of Terms and Coordinate Axis" chapter, and the content has been increased; 5) There have been major changes in the project arrangement, project content, indicators, and measurement methods. "Precision Inspection of Electric Spark Forming Machine" is a series of standards, including the following two parts: Part 1: Single-column Machine Tools (Cross Table Type and Fixed Table Type); Part 2: Double-column Machine Tools (Moving Spindle Head Type and Cross Table Type). This standard will replace GB/T5291-1985 from the date of implementation. Appendix A and Appendix B of this standard are both prompt appendices. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Special Processing Machine Tools. The drafting unit of this standard: Suzhou Electrical Processing Machine Tool Research Institute. The main drafters of this standard: Yu Zhisan and Fu Chunsen. This standard was first published in August 1985.
GB/T 5291.1--2001
ISOForeword
ISO (International Organization for Standardization) is a worldwide association of national standards bodies (ISO member bodies). The development of international standards is usually carried out by ISO technical committees. As long as they are interested in a subject for which a technical committee has been established, each member body has the right to participate in the work of the technical committee. International organizations, whether governmental or non-governmental, that maintain liaison relations with ISO also participate in the development of international standards. In the field of electrical standardization, ISO works closely with the International Electrotechnical Commission (IEC). Draft international standards adopted by the technical committee are sent to each member body for voting. At least 75% of the voting member bodies must vote in favor of publication as international standards.
International Standard ISO 11090-1 was prepared by Technical Committee ISO/TC39\Machine tools\Subcommittee SC2\Test conditions for metal cutting machine tools\.
ISO 11090 consists of the following parts under the general title "Test conditions for machine tools - Electrical discharge machines (EDM) - Terminology and accuracy test":
Part 1: Single-column machine tools (cross table type and fixed table type) Part 2: Double-column machine tools (movable spindle head type and cross table type) Annexes A and B to this part of ISO 11090 are informative appendices only. 6
National Standard of the People's Republic of China
Die sinking electro-discharge machines(EDM)-Testing of accuracy
Part 1 :Single column machines(cross slide table type and fixed tablie type) This standard aims to standardize the method for testing the accuracy of electro-spark machines (EDM). 1 Scope
GB/T 5291. 1--2001
eqv IS0 11090-1:1998
Replaces GB/T5291-1985
This standard specifies the geometric accuracy inspection, processing inspection and CNC axis positioning accuracy and repeat positioning accuracy inspection of general purpose and conventional precision electric discharge machines (EDM) with reference to GB/T17421.1 and GB/T17421.2. This standard also specifies the tolerance values ​​corresponding to the above inspections.
This standard is applicable to single-column machine tools of cross table type and fixed table type. This standard only deals with the inspection of machine tool accuracy, and is not suitable for machine tool operation tests (vibration, abnormal noise, fat movement of parts, etc.) or inspections of its parameters (such as speed, feed rate, etc.), which should usually be carried out before accuracy inspection. This standard also specifies the terms used for the main components of machine tools and names the coordinate axes with reference to ISO841. Note: In addition to the terms expressed in the three official ISO languages ​​(English, French and Russian), Appendix A (Suggestive Appendix) of this standard gives the equivalent terms in Dutch, German, Italian and Swedish. The publication of these language standards is the responsibility of the national member groups of Belgium (IBN), Germany (DIN), Italy (UNI) and Sweden (SIS). However, only the terms given in the official language can be regarded as ISO terms. 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/T17421.1-—1998 General rules for machine tool inspection Part 1: Geometric accuracy of machine tools under no-load or finishing conditions (eqv ISO 230-1:1996)
General rules for machine tool inspection Part 2: Determination of positioning accuracy and repeatability of axis of CNC machine tools GB/T17421.2—2000#
(eqv ISO 230-2:1997)
3 Terminology and nomenclature of coordinate axes
3.1 Cross table type
See Figure 1 and Table 1.
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on July 20, 2001 and implemented on March 1, 2002
Table (X axis)
Slide plate (Y axis)
Working fluid
Spindle head (W axis)
Spindle (Z axis)
Electrode mounting plate
Rotary axis (C axis)
Fixed table type
See Figure 2 and Table 2.
GB/T 5291.1--2001
Figure 1 Single-column machine tool with cross table
Table 1 Terminology
column
table(X-axis)
saddle(Y-axis)
work tank
head(W-axis)
quill(Z-axis)
electrode platen
spindle(C-axis)
[electrode
montant
table(axe X)
craHitHa
cTonka
CTU(GC, X)
chariot transversal(axe Y) cajiaski(ociY) reservoir de travail
[tete de travail(axe W)
(coulisse(axe Z)
f porte-electrode
broche(axe C)
electrode
Figure 2 Single-column machine tool with fixed worktable
[ pafo4aH BaHHa
ro.oBka,paoyas(ocbw)
HHo.(ocbZ)
aekTpo.O,e phaTe
WTHTeRE(OCL)
Slide plate(X-axis）
Ram(Y-axis）
Work table
Work tank
Spindle head(W-axis）
Spindle(Z-axis)
Electrode mounting plate
Rotation axis(C-axis）
4.1 Units of measurement
fcolumn
GB/T 5291.1—2001
Table 2 Terminology
montant
saddle(X-axis)
ram(Y-axis)
work tank
head(W-axis)
quill(Z-axis）
electrode platen
spindle(C-axis)
electrode
CTaHHHa
CTOMKa
chariot transversal(axe (axe Z)
porte-electrode
broche(axe C)
electrode
CTO.T(OCLY)
pabouan BaHHa
[ro.ToBka , paboan(ocW)
THHOJb(OChZ)
aJckTpOHOc pkaTeJb
HeL(OCEC)
In this standard, all linear dimensions, deviations and corresponding tolerances are expressed in millimeters, angles are expressed in degrees, and angular deviations and corresponding tolerances are expressed in ratios, but in some cases they may be specified in micro-arcs or angular seconds. The following expressions are equivalent: 0.010/1000=10106-10μrad2m
4.2 Reference to GB/T 17421.1
In the application of this standard, reference should be made to GB/T17421.1, especially the installation of machine tools before inspection, the preheating of rotating axes and other moving parts, the description of metrological methods and the recommended accuracy of inspection equipment. In the "Inspection Steps" column described in the next chapter, if the inspection involved complies with the provisions of the relevant provisions of GB/T17421, an explanation of the reference to the relevant provisions of GB/T17421.1 is attached. 4.3 Inspection sequence
The inspection sequence given in this standard does not limit the actual order of inspection. In order to simplify the installation of instruments or gauges, inspections can be carried out in any order.
Inspection items
When inspecting a machine tool, not all items specified in this standard must be inspected. When the inspection is for acceptance, the user can select those relevant inspection items of concern to him with the agreement of the supplier (manufacturer) and the requirements shall be met. When ordering a machine tool, the inspection items should be clearly specified. The acceptance inspection based on this standard alone, without stating the inspection items to be carried out and without reaching an agreement on the relevant costs, shall not be considered binding on any contracting party. 4.5 Measuring instruments
The measuring instruments specified in the inspection of this standard are only examples. Other instruments that can measure the same parameters and accuracy may also be used. The micrometer should have a resolution of 0.001 mm or higher.
4.6 Machining inspection
Machining inspection is only used for finishing and not for roughing, which is prone to produce significant cutting forces. 4.7 Minimum tolerance
When the measured length is different from the length specified in this standard (see 2.3.1.1 in GB/T17421.1-1998), the minimum tolerance value should be 0.005mm.
4.8 Positioning accuracy inspection and reference to GB/T17421.29
GB/T5291.1-2001
The inspections of P2 to P5 are only applicable to CNC EDM machines. When implementing these inspections, reference should be made to GB/T17421.2, especially in terms of environmental conditions, machine preheating, measurement methods, calculation of results and data processing.
The inspection of the W axis is not included because the movement of the W axis is usually used to adjust the position of the spindle head. When necessary, the same inspection as the Z axis should be carried out.
5 Geometric accuracy inspection
5.1 Linear motion axis
Check the straightness of X-axis motion
a) In the XY horizontal plane;
b) In the zx vertical plane
For a) and b)
0.015 on any 500 measuring length
Measuring instrument
Straight ruler, micrometer and gauge block, or optical method inspection steps and refer to GB/T17421.1--1998 5.2.3.2.1.1 The micrometer is fixed on the spindle head.
a) Set the straight ruler in the XY plane so that it is parallel to the X axis, and the micrometer touches the straight ruler. Move the X axis over the entire measuring length and record the reading. b) Repeat the same method in the zx plane to check the measured deviation
Checking the straightness of the Y-axis movement
a) in the XY horizontal plane;
b) in the YZ vertical plane
For a) and b)
0.015 on any 500 measuring length
Measuring instruments
Straightedge, micrometer and gauge block, or optical method GB/T 5291. 1--2001
Inspection steps and refer to 5.2.3.2.1.1 of GB/T17421.1-1998. The micrometer is fixed on the spindle head.
a) Set the straightedge in the XY plane and make it parallel to the Y axis, with the micrometer touching the straightedge. Move the Y axis over the entire measuring length and record the reading. b) Repeat the same check in the YZ plane. Measured deviation
GB/T 5291.1--2001
Simple diagram for checking the perpendicularity between the X-axis movement and the Y-axis movement
0.015 over any 300 measuring length
Measuring instruments
Straightedge, angle gauge and micrometer
Inspection steps and refer to 5.5.2.2.4 Measured deviation in GB/T17421.1--1998
Adjust the straightedge on the workbench so that it is parallel to the X-axis movement. Place the angle gauge against the straightedge and fix the micrometer on the spindle head so that it touches the angle gauge. Move the Y axis over the entire measuring length and record the reading. Alternatively, only the angle gauge can be used, in which case:
a) Set the angle gauge so that its long side is parallel to the X-axis movement. b) Check the parallelism between the Y-axis movement and the short side of the angle ruler 12
Check the perpendicularity between the vertical movement of the spindle (Z-axis) and
a) X-axis movement;
b) Y-axis movement
For a) and b)
0.02 on any 300 measuring length
Measuring instruments
Cylindrical angle ruler, plate, adjustment block and micrometer GB/T 5291. 1--2001
Inspection steps and refer to 5.5.2.2.4 of GB/T17421.1-1998 for measured deviation
The plate is placed on the workbench and adjusted so that its plane is parallel to both the X-axis and the Y-axis. The cylindrical angle ruler is placed on the plate and the micrometer is fixed on the spindle head.
a) Let the micrometer touch the cylindrical square in the X direction, move the spindle in the Z direction over the entire measuring length and record the readings at several positions. The maximum difference in the readings shall not exceed the tolerance. b) Repeat the inspection items in the Y direction in the same way.
Vertical movement of the spindle head (W axis) and
a) X axis movement;
b) axis movement
Verticality inspection between
For a) and b)
0.015 on any 300 measuring length
Measuring instruments
Cylindrical square, plate, adjustment block and sub-meter GB/T 5291. 1--2001
Inspection steps and refer to 5.5.2.2 in GB/T17421.1-1998.4 Measured Deviation
Place the flat plate on the workbench and adjust it so that its plane is parallel to both the X-axis and the Y-axis. Place the cylindrical square on the flat plate and fix the micrometer on the spindle head.
a) Make the micrometer touch the cylindrical square in the X direction, move the spindle head in the W direction over the entire measuring length and record the readings at several positions. The maximum difference in the readings shall not exceed the tolerance. b) Repeat the same check in the Y direction 1
Check the spindle runout during Z-axis motion
0.04/200 on any 300 measuring length
Measuring instruments
Micrometer and cylindrical square
GB/T 5291.1—2001
Inspection steps and refer to 5.2.3.1.3 Measured deviation in GB/T17421.1—1998
The cylindrical square is placed on the workbench, roughly parallel to the Y axis. The probe of the micrometer mounted on a special bracket touches the cylindrical square, record the readings and mark the corresponding heights on the cylindrical square. Move the micrometer to the other side of the spindle, move the X axis so that the probe touches the cylindrical square again along the same straight line, and measure and take into account the possible deviation of the X-axis motion. The dial gauge is re-zeroed, and the measurement is re-recorded at the same height of each original position. Calculate the difference between the two readings at each measuring height, select the maximum and minimum of these differences, and determine the value by the following formula: Maximum difference minus minimum difference
Must not exceed the tolerance, where d is the distance between the two positions of the dial gauge 1.bZxz.net
5.2 Workbench
Checking the flatness of the workbench surface
GB/T5291.1—2001
0.03 within 1000 measuring length; for every 1000 increase in length, the tolerance value increases by 0.01.
Note: The measured length refers to the length of the longer side of 0-X and 0-Y. Measuring instruments
Precision level or flat ruler, gauge block and micrometer or optical instrument or other instruments. Measured deviation
Inspection steps and refer to 5.3.2.2, 5.3.2.3, 5.3.2.4G in GB/T17421.1-1998?
Put the precision level on the workbench, move it step by step in the 0-X and 0-Y directions according to the relevant directions and corresponding lengths, and record the readings.
Record and calculate the values ​​measured each time
Use instructions:
111SO11090-1 is 5.322, 5.324". Because 5.3.2.3 of GB/T17421.1-1998 stipulates "the method of measuring flatness with a level", this item is added.
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