JB/T 8599.1-1997 This standard specifies the requirements and test methods for the geometric accuracy and working accuracy of CNC copying bed milling machines. This standard is applicable to general-purpose CNC copying bed milling machines with a worktable width of 320~1250mm. JB/T 8599.1-1997 Accuracy test of CNC copying bed milling machines JB/T8599.1-1997 Standard download decompression password: www.bzxz.net

JB/T 8599. 1—1997www.bzxz.net
This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of Beijing Milling Machine Research Institute. The drafting units of this standard are: Changzheng Machine Tool Co., Ltd., Beijing No. 1 Machine Tool Factory, Qiqihar No. 2 Machine Tool Factory, Qinghai No. 1 Machine Tool Factory, Nantong Machine Tool Co., Ltd., Shanghai No. 4 Machine Tool Factory, Shanghai Shenjiang Machinery Factory, Jiangdong Machine Tool Factory, Guilin Machine Tool Co., Ltd. 415
1 Scope
Machinery Industry Standards of the People's Republic of China
Precision Inspection of CNC Copying Bed Milling Machines
JB/T8599.1—1997
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of CNC copying bed milling machines. This standard is applicable to CNC copying bed milling machines with a worktable width of 320 to 1250 mm and general use. 2 Reference 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. GB1958---80 Shape and position tolerance detection regulations 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 General requirements
3:1 Refer to 3.1 in JB2670-82 to adjust the installation level. 3.1.1 When adjusting the installation level of a cross-table milling machine, place the table, slide, spindle box and other moving parts in the middle of the stroke, and place a level gauge in the center of the table. The readings of the level gauge in the longitudinal and transverse directions shall not exceed 0.03/1000. 3.1.2 When adjusting the installation level of a column-moving type or a ram-moving type milling machine, place a round inspection rod (for V-type guide rails) or a bridge plate (for flat guide rails) on the bed rails. Place a flat ruler on the round inspection rod or bridge plate perpendicular to the bed rails, and place a level gauge on the round inspection rod, bridge plate and flat ruler. Level gauge a is parallel to the guide rails, and level gauge b is perpendicular to the guide rails. Adjust the guide rails to level. The readings of level gauge a and b on the entire length of the guide rails shall not exceed 0.03/1000, as shown in Figure 1. Figure 1
3.2 When inspecting the machine tool accuracy, the ambient temperature is 20℃±5℃. 3.3 During the inspection, the actual inspection sequence can generally be arranged according to the requirements of the assembly and disassembly inspection tools, inspection convenience and thermal inspection items. 3.4 During the inspection of working accuracy, the inspection of the test piece should be carried out after fine processing. Approved by the Ministry of Machinery Industry of the People's Republic of China on August 18, 1997 416
Implemented on January 1, 1998
JB/T 8599.1-1997
3.5 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 JB267082. When the conversion result is less than 0.005mm, it shall be calculated as 0.005mm. 3.6 The direction parallel to the T-slot of the worktable is called the longitudinal direction, and the horizontal direction perpendicular to the longitudinal direction is called the transverse direction. 3.7 The vertical plane parallel to the longitudinal direction is called the longitudinal plane, and the vertical plane perpendicular to the longitudinal plane is called the transverse plane. 3.8 The motion axis code of the machine tool is shown in Figure 2a) and Figure 2b). According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. 3.9
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