JB/T 8772.1-1998 This standard is formulated based on JB/T 8771.1-1998 "Inspection conditions for machining centers Part 1: Geometric accuracy inspection of horizontal and machine tools with additional spindle heads (horizontal Z axis)" (this standard is equivalent to the draft international standard ISO/DIS 10791-1 "Inspection conditions for machining centers Part 1: Geometric accuracy inspection of horizontal and machine tools with additional spindle heads (horizontal Z axis)"). It is the same as JB/T 8771.1-1998 in terms of inspection items, inspection methods, inspection tools, etc., and the tolerance is compressed on the basis of this standard (the compression ratio is about 1.6). This standard specifies the requirements and inspection methods for the geometric accuracy of precision horizontal machining centers (i.e. horizontal Z axis). This standard is applicable to precision horizontal machining centers that basically have four CNC axes, namely: three linear coordinates (X, Y, Z), a travel of up to 2000mm and a rotary axis (B') related to the worktable. The appendix to this standard lists three possible inspection items for additional universal spindle heads: Appendix A: 45° half-indexing spindle head, with mechanical indexing of two objects (such as Haier coupling) at different angular positions: the corresponding inspections (AG1 to AG9) only check the final position of the spindle; Appendix B: Rotary spindle head, with two CNC rotary axes perpendicular to each other (inspections BG1 to BG7); Appendix C: 45° half-indexing spindle head, similar to the first form, but with continuous indexing of two CNC rotary axes: the corresponding inspections (CG1 to CG7) are to check all geometrical characteristics (planes and axes) that affect the final position of the spindle, except for the positioning accuracy of the two rotary axes; these inspections can also be used for further testing of 45° half-indexing spindle heads, as long as their movement and locking allow this. JB/T 8772.1-1998 Inspection conditions for precision machining centers Part 1: Inspection of geometric accuracy of horizontal and attached spindle head machines (horizontal Z axis) JB/T8772.1-1998 standard download decompression password: www.bzxz.net

JB/T8772.1—1998
This standard is formulated based on JB/T8771.1 "Inspection conditions for machining centers Part 1: Geometric accuracy inspection of horizontal and machine tools with additional spindle heads (horizontal Z axis)" (this standard is equivalent to ISO/DIS10791-1 "Inspection conditions for machining centers Part 1: Geometric accuracy of horizontal and machine tools with additional spindle heads"), and is the same as JB/T8771.1 in terms of inspection items, inspection methods, inspection tools, etc., and the tolerance is compressed on the basis of this standard (the compression ratio is about 1.6). This standard is one of the standards in the series of inspection conditions for precision machining centers. This series of standards includes the following 13 parts, which can be used together or separately:
Part 1: Geometric accuracy inspection of horizontal and attached spindle head machine tools (horizontal B axis); Part 2: Geometric accuracy inspection of vertical machining centers; Part 3: Geometric accuracy inspection of integral universal spindle head machine tools with horizontal main rotary axis (vertical Z axis) (to be formulated); Part 4: Positioning accuracy and repeatability inspection of linear and rotary axes; Part 5: Positioning accuracy and repeatability inspection of workpiece clamping pallets; Part 6: In-line Feed, speed and interpolation accuracy inspection (to be formulated); Part 7: Precision inspection of finished test pieces; Part 8: Spherical evaluation using the circular test method (to be formulated); Part 9: Evaluation of tool change and pallet change action time (to be formulated); Part 10: Evaluation of thermal deformation (to be formulated); Part 11: Evaluation of noise emission (to be formulated); Part 12: Evaluation of vibration intensity (to be formulated); Part 13: Evaluation of safety measures (to be formulated); Appendix A, Appendix B and Appendix C of this standard are all standard appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. Drafting units of this standard: Beijing Machine Tool Research Institute, Kunming Precision Machine Tool Research Institute, Ningjiang Machine Tool Factory. The main drafters of this standard: Tang Qishou, Xie Ling, Xie Hong, Qian Wenming, Chen Mingsheng. 580
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Test conditions of precision machining centres
Part 1: Geometric tests for machines with horizontalspindle and with accessory heads (horizontal Z axis)JB/T8772.1—1998
This standard specifies the requirements and test methods for the geometric accuracy of precision horizontal machining centres (i.e. horizontal B axis). This standard is applicable to precision horizontal machining centres that basically have four CNC axes, i.e. three linear coordinates (X, Y, Z) with a travel of up to 2000 mm and one rotary axis (B') related to the worktable. The appendix to this standard lists the test items for three possible additional universal spindle heads. Appendix A (normative appendix); 45° indexing spindle head, with mechanical indexing of two objects (such as Haisi coupling) at different angular positions: corresponding inspection (AG1 ~ AG9) instrument checks the final position of the spindle; - Appendix B (normative appendix): rotary spindle head, with two CNC rotary axes perpendicular to each other (inspections BG1 ~ BG7); - ... - Appendix C (normative appendix): 45° continuous indexing spindle head, similar to the first form, but with continuous indexing of two CNC rotary axes: corresponding inspection (CG1 ~ CG7) to check all geometrical characteristics (planes and axes) that affect the final position of the spindle, except for the positioning accuracy of the two rotary axes; these inspections can also be used for further testing of 45° indexing spindle heads, as long as their movement and locking allow this.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. 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 JB3051-82 Designation of Coordinates and Motion Directions of Digitally Controlled Machine Tools 3 General Requirements
3.1 All linear dimensions in this standard are expressed in millimeters (mm). Angular deviations are mainly expressed in ratios. In some cases, for clarity, they are also expressed in microradians (μrad) and seconds (\). The conversion relationship is based on the following expression: 0.010/1 000=10×10-6=10 μrad~2(\)3.2 When using this standard, reference must be made to GB/T17421.1, especially the installation before machine tool inspection, the idle temperature rise of the spindle and other moving parts, the measurement methods and the recommended accuracy of the inspection tools. 3.3 Refer to 3.1 of GB/T17421.1-1998 to adjust the installation level of the machine tool. The reading of the level gauge in the vertical and horizontal directions shall not exceed 0.020/1000.
3.4 ​​During the inspection, the ambient temperature should be maintained within 20℃±2℃. Approved by the State Bureau of Machinery Industry on July 17, 1998 and implemented on December 1, 1998
JB/T 8772. 1-1998
3.5 The order of the inspection items in this standard does not represent the actual inspection order. In order to facilitate the installation and disassembly of inspection tools and inspection, the inspection can be carried out in any order.
3.6 When inspecting the machine tool, it is not necessary to inspect all the items in this standard according to the structural characteristics. When the inspection is required for acceptance purposes, the user can obtain the manufacturer's consent to select some inspection items that he is interested in, but these items must be clearly stated when ordering the machine tool. 3.7 The inspection tools specified in this standard are only examples. Other inspection tools with the same indication and at least the same accuracy can be used. The indicator should have a resolution of 0.001mm or higher. 3.8 For the sake of simplicity, this standard only uses a schematic diagram of a machine tool with one structural type. 3.9 For machine tools with several pallets, when inspecting the inspection items related to the pallet (i.e. G15~G22), if it is not clearly specified in the machine tool order agreement, only one pallet locked in the working position shall be inspected (i.e. the representative pallet). 3.10 When the software equipment can compensate for the deviation of certain inspection items, the inspection can be carried out with or without these compensations according to the agreement between the manufacturer and the user. When software compensation is used, it should be noted in the inspection results. 3.11 The coordinates and movement direction of the machine tool shall comply with the provisions of JB3051. Figure 1 of this standard gives examples of 12 different structural types of machine tools according to the movement of machine tool components along three coordinate linear axes (i.e. X, Y, Z), and uses numbers 01 to 12 to mark these structural types. Their classification is shown in Table 1.
Table 1 Classification of machine tool structure types
Column on saddle
Column saddle
Spindle box slide plate
Workbench on saddle
Workbench on saddle
Workbench slide saddle
Lifting table
Workbench
Lifting table slide saddle
Workbench
Spindle box
Spindle boxbzxZ.net
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box slide plate
Spindle box slide plate
Spindle box slide plate
Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt||Tt| |Lifting table
Lifting table saddle
Lifting table
Lifting table
Column saddle
Spindle box
Column on saddle
Spindle box
Spindle box on slide plate
Spindle box on slide plate
Spindle box on slide plate
3.12 This standard recommends the use of a short symbol to indicate the structural type of the machine tool, which consists of the following parts: Standard number:
The letter "H" indicating "horizontal";
The numbers indicated in the corresponding box in Figure 1 and the serial number column in Table 1. z
Workbench saddle
Workbench
Workbench saddle
Workbench on saddle
Example: The column moves along the X-axis, the spindle box moves along the Y-axis, and the workbench moves along the B-axis. The symbol of the machine tool is: Precision machining center JB/T8772.1 type H023.13 When the measured length is different from the length specified in this standard, the specified tolerance value shall be converted according to the measurable length according to the provisions of 2.3.1.1 in GB/T17421.1--1998. When the conversion result is less than 0.003mm, it shall be calculated as 0.003mm. 582
JB/T 8772.1—1998
Figure 1 Machine tool structure diagram
1—1998
JB/T 8772.
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0z1~008
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