JB/T 8771.1-1998 This standard is equivalent to the draft international standard ISO/DIS 10791-1 "Test conditions for machining centers Part 1: Geometric accuracy test of horizontal and additional spindle head machines (horizontal Z axis)". This standard specifies the requirements and test methods for the geometric accuracy of horizontal and additional spindle head machines. This standard is applicable to general-purpose ordinary precision horizontal machining centers that basically have four CNC axes, namely, three linear axes (X, Y, Z) with a stroke of up to 2000mm and one rotary axis (B'), and is also applicable to additional movements related to sliding spindles, rams or three different forms of additional universal spindle heads. The appendix to this standard lists three possible test items for additional universal spindle heads: Appendix A: 45° bisection indexing spindle head (AG1 to AG9); Appendix B: Rotary spindle head (BG1 to BG7); Appendix C: 45° bisection continuous indexing spindle head (CG1 to CG7). JB/T 8771.1-1998 Inspection conditions for machining centres Part 1: Geometric accuracy inspection for horizontal and additional spindle head machines (horizontal Z axis) JB/T8771.1-1998 standard download decompression password: www.bzxz.net

JB/T 8771. 1-—1998
This standard is formulated based on the draft international standard ISO/DIS10791-1 "Test conditions for machining centers Part 1: Geometric accuracy test of horizontal and attached spindle heads (horizontal B axis)". It is equivalent to the draft international standard in terms of technical content. This standard has the following main differences from ISO/DIS10791-1: 1. "Preface" part, because its main content is included in the "Foreword", this part is cancelled. - The words "This verticality deviation can also be deduced from the inspection of GX and G×X" in "Refer to ISO230-1 and Remarks" of G13, G14, G18, AG2, AG3, AG5, and AG6 are cancelled because direct inspection can better reflect the actual situation of accuracy. In 4.2 Angle deviation of linear motion, the inspection of G6 c) in the ZX water sub-plane (tilt) is cancelled because its inspection method cannot accurately and conveniently meet the requirements of this inspection item, and this inspection item can be controlled by the inspection of G3 a). This standard is one of the series of standards for inspection conditions of machining centers. This series of standards includes the following 13 parts, which can be used simultaneously or separately:
Part 1: Geometric accuracy inspection of horizontal and machine tools with additional spindle heads (horizontal B axis) Part 2: Geometric accuracy inspection of vertical machining centers Geometric accuracy inspection (vertical Z axis) (to be formulated) Part 3: Integral spindle head machine tools with horizontal main rotary axis Part 4: Linear and rotary spindle Part 5: Positioning accuracy and repeatability test of the axis of rotation Part 6: Test of feed rate, speed and interpolation accuracy (to be formulated) Part 7: Test of precision of finished test pieces Part 8: Evaluation of spherical shape by 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) (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 Metal Cutting Machine Tool Standardization. The drafting units of this standard are: Beijing Machine Tool Research Institute, Beijing Milling Machine Research Institute, Shenyang Boring and Drilling Machine Research Institute, Qinghai First Machine Tool Factory. The main drafters of this standard are: Fei Zaosheng, Zheng Xuemei, Liu Ruiting, Chen Mingsheng. 487
JB/T 8771.1-1998
ISOForeword
ISO (International Organization for Standardization) is a federation of national standardization organizations (ISO members) around the world. The development of international standards is usually carried out by ISO technical committees. Each ISO member interested in a topic established by a technical committee has the right to express its opinion in the technical committee. International organizations, official or non-official organizations associated with ISO may also participate in this work. ISO works closely with the International Electrotechnical Commission (IEC) responsible for electrical standards. Draft international standards accepted by the technical committee are sent to each member for comment and then voted on. The publication of international standards requires approval by at least 75% of the members.
ISO 10791-1 was developed by ISO/TC 39
Developed by the Machine Tool Technical Committee.
Appendices A, B and C of this international standard are all normative appendices. 488
1 Scope
Machinery Industry Standard of the People's Republic of China
Test conditions of machining centres
Part 1: Geometric tests for machines with horizontal spindleand with accessory heads (horizontal Z axis)
Test conditions of machining centresPart 1 : Geometric tests for machines with horizontal spindleand with accessory heads (horizontal Z axis) This standard specifies the requirements and test methods for the geometric accuracy of horizontal and accessory spindle heads. JB/T 8771. 1—1998
This standard applies to general purpose ordinary precision horizontal machining centers with four CNC axes, including three linear axes (X, Y, Z) with a stroke of up to 2000mm and one rotary axis (B\), and also applies to additional movements related to sliding spindles, rams or three different forms of additional universal spindle heads. The appendix to this standard lists the inspection items of three possible additional universal spindle heads:-Appendix A (Appendix to the standard): 45° bisection indexing spindle head (AG1~AG9)-Appendix B (Appendix to the standard): Rotary spindle head (BG1~BG7);-Appendix C (Appendix to the standard): 45° bisection continuous indexing spindle head (CG1~CG7) 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard by 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 version of the following standards. GB/T17421.1-1998 General Rules for Machine Tool Inspection Part 1: Geometrical Accuracy of Machine Tools Under No-load or Finishing Conditions JB3051-82 Designation of Coordinates and Motion Directions of Digital Control Machine Tools 3 General Requirements bzxZ.net
3.1 All linear dimensions in this standard are expressed in millimeters; angular deviations are mainly expressed in ratios, and in some cases, for clarity, are also expressed in micro-radians (μrad) and seconds (\). The conversion relationship is shown in the following formula: 0.010/1000=10×10-8=10μrad~23.2 When using this standard, reference must be made to GB/T17421.1, especially the installation before machine tool inspection, the idle running temperature rise of the spindle and other moving parts, the measurement methods and the recommended accuracy of the inspection tools. 3.3 The order of geometrical accuracy inspection items is arranged according to a group of similar inspections or according to the machine tool components, so it does not represent the actual inspection order. In order to facilitate the installation and disassembly of inspection tools and inspections, inspections can be carried out in any order. 3.4 When inspecting a machine tool, not all items in this standard must be inspected due to the structural characteristics. When inspection is required for acceptance purposes, the user may obtain the manufacturer's agreement to select some inspection items of interest, but these inspection items must be clearly stated when ordering the machine tool. 3.5 The inspection tools specified in this standard are only examples. Other inspection tools with the same indication and at least the same accuracy may be used. The indicator should have a resolution of 0.001 mm. Approved by the State Bureau of Machinery Industry on July 17, 1998 and implemented on December 1, 1998
JB/T 8771. 1-1998
3.6 For the sake of simplicity, this standard only includes a schematic diagram of a machine tool of a certain structural type. 3.7 For machine tools with several pallets, when inspecting items related to the inherent geometric characteristics of the pallets or their state relative to the machine axis (G15 to G22), it shall only be carried out on any pallet locked in the working position, unless otherwise specified in the written agreement. 3.8 When software equipment can compensate for certain geometric deviations, the relevant inspection items can be inspected with or without these compensations according to the agreement between the manufacturer and the user. When software compensation is used, it should be indicated in the inspection results. 3.9 Coordinates and movement direction of machine tools According to the provisions of JB3051, Figure 1 contains 12 different structural types of horizontal machining centers showing the movement of components along the three-coordinate linear axis and examples of their coordinates and movement directions. These structural types are marked with numbers from 01 to 12, and their classification is shown in Table 1.
3.10 A mark is provided to use a short code to determine the structural type of the machining center. This mark consists of the following parts: a standard number;
The letter "H" representing "horizontal";
The numbers indicated in the corresponding boxes of Figure 1 and the serial number column of Table 1. Example: The symbol of a horizontal machining center with the column moving along the X-axis, the spindle box slide moving along the Y-axis, and the table moving along the Z-axis is:
Machining center JB/T8771.1 type H02
When the measured length is different from the length specified in this standard, the tolerance should be converted according to the measurable length according to the provisions of 2.3.1.1 of GB/T17421.1-1998. When the conversion result is less than 0.005mm, it is still converted to 0.005mm meter. Table 1 Structural type classification of horizontal machining center
On the slide
Column slide
Spindle box
On the slide
Workbench
On the slide
Workbench
Lifting table
Workbench
Lifting table
Workbench
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Spindle box
Lifting table||tt| |Lifting table
Lifting table
Lifting table
Spindle box
On the saddle
Spindle box
On the slide board
Spindle box
On the slide board
Spindle box
On the slide board
Spindle box
Workbench
Workbench
Workbench
On the saddle
Workbench
JB/T8771.11998
Figure 1 Schematic diagram of the structure of the horizontal machining center and its coordinates and movement direction 491
JB/T 8771. 1-1998
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