JB/T 8648.1-1997 This standard specifies the requirements and methods for the geometric accuracy inspection and working accuracy inspection of drilling machining center holes. This standard is applicable to vertical and horizontal drilling machining centers with a maximum drilling diameter of no more than 40mm and a working surface width of 320~500mm on the workbench. JB/T 8648.1-1997 Drilling machining center accuracy inspection JB/T8648.1-1997 standard download decompression password: www.bzxz.net

JB/T8648.1—1997
This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of Shenyang Boring and Drilling Machine Research Institute. The drafting units of this standard are: Beijing No. 3 Machine Tool Factory, Shanghai No. 5 Machine Tool Factory, Jingsha No. 1 Machine Tool Factory, Changzhou Machine Tool Factory, and Dahe Machine Tool Factory. 446
1 Fanquan
Standards of the Machinery Industry of the People's Republic of China
Precision Inspection
Drilling Processing Center
JB/T 8648.1--1997bZxz.net
This standard specifies the requirements and inspection methods for the geometric accuracy inspection and working accuracy inspection of drilling processing centers. This standard is applicable to vertical and horizontal pre-drilling processing centers with a maximum drilling diameter of no more than 40mm and a working surface width of the worktable of 320~～500mm.
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 valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB10931~89 Method for evaluating the position accuracy of digital control machine tools JB2670—82 General rules for precision inspection of metal cutting machine tools JB3051-82 Nomenclature of coordinates and movement directions of digital control machine tools 3 General requirements
3.1 When using this standard, refer to JB2670, especially the installation before precision inspection, the idle running temperature rise of the spindle and other components, and the inspection method.
3.2 Refer to 3.1 in JB2670—82 to adjust the installation level. The readings of the level meter in the X and Y directions (or Z directions) shall not exceed 0.04/1000.
3.3 During the inspection, the actual inspection order can generally be arranged according to the requirements of disassembly and assembly inspection tools, inspection convenience, and thermal inspection items. 3.4 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 in JB2670-82. When the conversion result is less than 0.005mm, it shall be calculated as 0.005mm. 3.5 If there is no special provision for the position of the linear motion parts of the machine tool in the inspection method, the linear motion parts of the machine tool should be placed in the middle position of its stroke. Where the position of the rotary table is not clearly specified, it should be located at the zero position and in a clamped state during the inspection. 3.6 For machine tools with multiple spindles, items related to the spindle should be inspected on each spindle. 3.7 For machine tools with exchange tables, the geometric accuracy items related to the exchange tables can be inspected by exchanging each exchange table to the workstation position.
3.8 When the inspection tool cannot be placed as shown in the schematic diagram due to the limitation of the machine tool structure, the position of the inspection tool is allowed to be changed, but the inspection principle cannot be changed, and the position deviation should be minimized. 3.9 The coordinates and movement direction of the machine tool shall comply with the provisions of JB3051. The coordinates, movement direction and common structural types are shown in Figure 1. 3.10 According to the structural characteristics and the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the Ministry of Machinery Industry of the People's Republic of China on August 18, 1997 and implemented on January 1, 1998
JB/T8648.1—1997
Figure 1 Schematic diagram of machine tool coordinates and movement direction
Note: In the figure, X, Y, and Z are the movement direction codes of the tool spindle, and X', Y, and Z are the movement direction codes of the worktable, and the direction indicated by the arrow is positive. 448 | |tt |
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