JB/T 9927.1-1999 This standard is a revision of ZB J54 011-88 "Precision of short thread milling machines". During the revision, only editorial changes were made according to relevant regulations, and the technical content was not changed. This standard is part of the JB/T 9927 "Short thread milling machine" series of standards, which includes the following two parts: JB/T 9927.1-1999 Short thread milling machine precision inspection JB/T 9927.2-1999 Short thread milling machine technical conditions This standard specifies the geometric accuracy and working accuracy inspection requirements and inspection methods of short thread milling machines. This standard is applicable to short thread milling machines with a maximum milling diameter of 200mm, a maximum milling length of 80mm, and a maximum workpiece length of 2500mm, which use the comb milling method to process ordinary threads. This standard was first issued in April 1988. JB/T 9927.1-1999 Short thread milling machine precision inspection JB/T9927.1-1999 standard download decompression password: www.bzxz.net

ICS 25.080.99
Machinery Industry Standard of the People's Republic of China
JB/T9927.1~9927.2—1999
Short Thread Milling Machine
Published on 1999-05-20
State Machinery Industry Bureau
2000-01-01 Implementation
JB.T9927.1--1999
This standard is a revision of the ZBJS40I88 short screw grade precision machine tool. Only the relevant provisions have been edited and the technical content has changed.
This standard is part of the B9927 short end thread sharp end series of standards. The series of standards includes the following two parts: J8/T9927.1-1999 Short screw end thread precision inspection JB/T9927.2-1999 Short thread standard machine tool technical conditions This standard replaces ZBJ54011-B from the date of implementation. This standard is proposed by the National Standardization Technical Committee for Machine Tools. This standard is issued by the National Standardization Technical Committee for Metallurgical Gear Machine Tools Branch. The responsible drafting unit of this standard is: Jihai Second Machine Tool Factory 4th Standardization Department 19404 first issued.
Machinery Industry Standard of the People's Republic of China
Precision Inspection of Short Thread Milling Machines
This standard specifies the requirements and inspection methods for short thread milling machines JA/T9927.1-19490
8540188
The maximum cutting diameter is 20mm, the maximum milling length is 80mm, and the maximum length of the piece is 2503mm. For short thread milling machines that are to be used, 2 reference standards
The provisions contained in the following standards shall constitute the provisions of this standard by reference in the standard. When the standard is published, the version shown is uniformly distributed: All standards will be revised. All parties using this standard should explore the possibility of using the latest version of the following standards: GB:T 197-1981
Back screw system tolerance and equipped with
GBT17421. 1998 Machine tool inspection and test Part 1: Precision of machine tools without negative or positive conditions 3 General requirements
3.1 Adjust the installation level according to GT1721.1. Place the lubricating plate in the middle of the line difference, on the guide rails at both ends of the machine or on the special bridge plate (as shown in area 1), the horizontal readings in the horizontal and horizontal directions do not exceed .4/1000), and the inspection can be generally arranged according to the actual inspection order according to the convenience of installation and disassembly, and the requirements of the inspection items. 3.3 Consider the inspection of the workpiece after the test is small. 3.4 When the actual length is less than the length specified in this standard, the difference is calculated according to the length that can be measured according to the standard 174211423.11: when the conversion result is less than 0.005mm, you shall calculate it as 0.005mm. 3.5 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. 01 Implementation
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