JB/T 7414.1-1999 JB/T 7414.1-1999 Vertical three-dimensional copy milling machine accuracy inspection JB/T7414.1-1999 Standard download decompression password: www.bzxz.net

ICS 25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T7414.1-1999
Vertical stereoscopic copy milling machine
1999-05-20 Issued
State Bureau of Machinery Industry
Precision Inspection
Implementation on 2000-01-01
JB/T7414.1-1999
This standard is a revision of ZBJ54007-88 "Precision of Vertical Stereoscopic Copy Milling Machine". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content remained unchanged.
This standard is part of the JB/T7414 "Vertical stereoscopic milling machine" series of standards, which includes the following two parts: JB/T7414.1-1999 Vertical stereoscopic milling machine accuracy inspection JB/T74141994 Vertical stereoscopic milling machine technical conditions This standard replaces ZBJ54007-88 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Milling Machine Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Changzheng Machine Tool Co., Ltd. This standard was first issued in February 1988.
1 Scope
Machinery Industry Standards of the People's Republic of China
Vertical stereoscopic milling machine accuracy inspection
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of vertical stereoscopic milling machines. JB/T 7414.1—1999
Replaces ZBJ54007—88
This standard applies to T. Lifting tables (including rocker-arm copy milling machines) with a working table width of 200~500mm and T. General-purpose vertical copy milling machines with a working table width of 400~1000mm. 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. GB/T 1958—1980
Provisions for shape and position tolerance testing
GB17421.1—1998 General Rules for Machine Tool Inspection Part 1: Geometrical Accuracy of Machine Tools under No-Load or Finishing Conditions 3 General Requirements
3.1 Adjust the installation level of the machine tool in accordance with the provisions of 3.1 in GB/T17421.1—1998. 3.1.1 Vertical Lift Table Copy Milling Machine
Place the worktable in the middle of the stroke, place a level gauge in the center of the worktable, and the readings of the level gauge in the longitudinal and transverse directions shall not exceed 0.04/1000.
3.1.2 Vertical Lift Table Copy Milling Machine
a) When adjusting the installation level of a cross table milling machine, place the moving parts such as the worktable, slide and spindle box in the middle of the stroke. Place a level in the center of the workbench. The readings of the level in the vertical and horizontal directions shall not exceed 0.04/1000. b) When adjusting the installation level of the column-type and pillow-clearing mobile milling machines, place a round test rod (for V-type guide rails) and a bridge plate (for flat guide rails) on the bed rails, and place a flat ruler on the round test rod and the bridge plate perpendicular to the bed rails. Place a level on each of the round test rod and the bridge plate. Level a is parallel to the guide rails, and level b is perpendicular to the guide rails (see Figure 1). Adjust the guide rails to level. The readings of level a and b shall not exceed 0.04/1000.
3.2 During inspection, the actual inspection order can generally be arranged according to the requirements of assembly and disassembly inspection tools, inspection convenience, and thermal inspection items. 3.3 During the working accuracy inspection, the inspection of the test piece should be carried out after fine machining. 3.4 When the actual measured length is different from the measured length specified in this standard, the tolerance value shall be converted according to the measurable length in accordance with the provisions of 2.3.1.1 of GB/T17421.11998. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 3.5 According to the agreement between the user and the manufacturer, the inspection items may be increased or decreased. Approved by the State Bureau of Machinery Industry on May 20, 1999 and implemented on January 1, 2000
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