JB/T 9912.2-1999 This standard is a revision of ZB J55 006-87 "Accuracy of optical profile grinders". This standard is part of the JB/T 9912 "Optical profile grinder" series of standards, which includes the following three parts: JB/T 9912.1-1999 Series of optical profile grinders JB/T 9912.2-1999 Accuracy inspection of optical profile grinders JB/T 9912.3-1999 Technical conditions of optical profile grinders The standards supporting this series of standards are: GB/T 7924-1987 Parameters of optical profile grinders This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of optical profile grinders. This standard is applicable to optical profile grinders with a maximum grinding length of 100~320mm. This standard was first issued in April 1987. JB/T 9912.2-1999 Optical Curve Grinding Machine Accuracy Test JB/T9912.2-1999 Standard Download Decompression Password: www.bzxz.net

ICS 23,080.50
Machinery Industry Standard of the People's Republic of China
JB/T 9912.1-9912,3—1999
Optical Profile Grinding Machine
1999-05-20 Issued
State Bureau of Machinery Industry
2000-01-01 Implementation
JBT99122—1999
This standard is revised on the basis of ZB155006-87 "Optical Profile and Machine Precision". The technical content of this standard is consistent with ZBJ5S00687, and it has only been newly edited according to relevant regulations. This standard is part of the JB series of standards for optical profile grinders, which includes the following two parts: JB/T9912.1: Series of optical profile grinders JB/T9912.2-1999 Accuracy test of optical profile grinders JB/T9912.3-1999 Technical conditions for optical profile grinders The standards that match this standard are: GB/TT924-1987 Specifications for optical profile grinders This standard replaces GB/T95006-1997 from the date of implementation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools Grinding Branch. The responsible unit for this standard is: 1. Shanghai Third Machine Tool Factory. This standard was first issued in April 1987. www.bzxz.net
1 Scope
Machinery Industry Standard of the People's Republic of China
Precision Inspection of Optical Profile Grinding Machines
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of optical profile grinding machines. This standard is applicable to optical profile grinding machines with a large cutting length of 100-320mm. 2 References
JB/T9912.2-1999
Replaces ZBF5D06-87
The following provisions are included in the standard, and constitute non-standard provisions through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should consider the possibility of using the latest version of the following standards: H/[1 421.1-19% General Rules for Inspection of Machine Tools Part 1: Under Elementary Load or Load 3.1 This standard must refer to the relevant provisions of GST17421.1, especially the installation before the inspection, the idling temperature rise of the spindle and other parts, the inspection method and the accuracy of the tool. 3. Before the internal precision inspection, the installation level of the machine tool must be adjusted first; the horizontal readings in the longitudinal and lateral directions shall not exceed 0.02:1000. 3.3 During the machine tool precision inspection, the ambient humidity should be maintained at 20℃±3℃. 3.4 The order of precision inspection listed in this standard does not represent the order of actual inspection, and the inspection can be carried out in any order. 3.5 During the working precision inspection, the test piece should be inspected after grinding. 3.6 When the measured length is different from the length specified in this standard, the tolerance shall be calculated according to the provisions of 2.3.1.1 of GB/17421.1, 1998, according to the measured length. When the conversion result is less than 0.001mm, it shall still be calculated as 0.001mm: 3.7 According to the agreement between the user and the manufacturer, the inspection items may be increased or decreased. Approved by the Machinery Industry Bureau No. 199-0-2
2000-01-01
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