JB/T 8782-1998 JB/T 8782-1998 Closed high-speed precision press accuracy JB/T8782-1998 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T8782·-1998
Closed High Speed ​​Precision Press
Published on July 17, 1998
National Bureau of Machinery Industry
Implementation on December 1, 1998
JH6782—1998bzxZ.net
This standard is not equivalent to the national standard J1SB6402-1994<Test methods and inspection of machine-reducing presses3 The standard is the mechanical industry standard JB/GQ2006-89 closed high-speed precision press machine accuracy (industry standard) formulated in my country. It is formulated on the basis of summarizing the production experience of my country over the years, absorbing the advantages of similar foreign products, and examining the technical materials of similar foreign products. This standard is proposed and coordinated by the National Forging and Pressing Standardization Technical Committee. The drafting unit of this standard is Shanghai No. 2 Forging and Pressing Factory. The main drafters of this standard are Gu Jinming and Hong Hai. Scope
Mechanical Industry Standard of the People's Republic of China
Closed High-speed Precision Press
JB/T8782-1996
This standard specifies the basic requirements, geometric accuracy, tolerance and inspection methods for the precision inspection of closed high-speed precision presses. This standard applies to closed high-speed precision presses with a ball force not exceeding 2500kN (hereinafter referred to as presses). 2 Referenced standards
The texts contained in the following standards become the provisions of this standard by reference in this standard. When the standard is published, the versions shown are valid. All standards are subject to revision. Parties using technical standards should explore the possibility of using the latest versions of the following standards. GB57067
GB 10923-89
3 Basic requirements
Numerical revision
General rules for precision inspection of forging and pressing machines
3.1 The upper plane of the workbench is the reference surface for precision inspection of the forging machine. If the pressure machine is not equipped with a workbench, the workbench surface is used as the basic surface for precision inspection.
3.2 Before the precision inspection, the forging machine should be adjusted to a level, and the vertical and horizontal readings of the inspection level should not exceed 0.10/100)mm. 3.3 When the outer size of the inspected plane is L1000m, it is not inspected within the range of 6.11. When the outer size is ocenter mm, it is not inspected within the range of 3.4 The accuracy test does not represent the actual test order. 3.5 The tolerance value of the test items is calculated by the actual test length and the formula specified in this standard. The calculation result is in accordance with GBB170, revised micron number. 3. For the adjustable stroke Baoli machine, the geometric accuracy is tested according to the maximum stroke. Approved by the Machinery Industry Bureau in 19817, implemented in 1998-1201, 3B/T8782--1998, JB/T8782--1998, 2605, etc., JE/T 8782--1998, JB/T8787.-1998, etc.
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