JB/T 9918.1-1999 This standard is a revision of ZB J55 027-88 "Precision of high-precision hob grinders". This standard is part of the JB/T 9918 "High-precision hob grinders" series of standards, which includes the following two parts: JB/T 9918.1-1999 Precision inspection of high-precision hob grinders JB/T 9918.2-1999 Technical conditions for high-precision hob grinders This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of high-precision hob grinders. This standard is applicable to high-precision hob grinders with a maximum hob diameter of 250mm. This standard was first issued in October 1988. JB/T 9918.1-1999 High Precision Hob Grinding Machine Accuracy Test JB/T9918.1-1999 Standard Download Decompression Password: www.bzxz.net

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Machinery Industry Standard of the People's Republic of China
JB/T 9918.1~9918.2—1999
High Precision Hob Grinding Machine
Published on 1999-05-20
State Machinery Industry Bureau
2((H0-01-)1 Implementation
JB/T9918.1—1999
This standard is revised on the basis of ZJ5527—88 Commercial Precision Hob Grinding Machine Accuracy. The original version was designed with reference to the requirements of foreign advanced standards.
This standard is consistent with the technical content of ZD155027—88, and has been revised in accordance with relevant regulations. This standard is part of the JB/T991B Commercial Precision Hob Grinding Machine series of standards, which includes the following two parts: 1B/T9918.1—1999 High Precision Hob Grinding Machine Accuracy Inspection JB/F9918.2—1999 High Precision Hob Grinding Machine Technical Conditions Standards compatible with this standard
/18076—199 5. Cutting machine tool standard
This standard replaces 2B155027-8. The standard is proposed by the Technical Committee for Standardization of Cutting Machine Tools. It is under the jurisdiction of the Technical Committee for Standardization of Cutting Machine Tools and the Machine Tool Branch. The responsible drafting unit of this standard is Wuhan Tool Grinding Machine Research Institute. This standard was first issued in October 198B. ​​1. Scope
Machinery Industry Standard of the Republic of China
High Precision Hob Grinding Machine
Precision Inspection
This standard specifies the requirements and inspection potential for the geometric accuracy and working accuracy of high-precision hob grinding machines. This standard is applicable to high-precision hob grinding machines with a maximum cutting hob diameter of 25mm. 2. Reference Standards
JB/T 9918.1—[999
代287554027-8
The following standards contain the provisions, which constitute the provisions of this standard through reference in this standard. When the whole standard is issued, the versions shown are valid. All standards will be revised. The parties who use this standard should explore the possibility of using the latest versions of the following standards. G日T17421.1—1998 General rules for machine tool inspection Part 1: Mechanical fatigue test of machine tools under no-load or finishing operation JB227
3妞求
General technical rules for high-precision gears
3.1 Refer to GB /T17421.1-1998 3.1 Measure the machine level. Place the upper table in the middle of the stroke, and place a level gauge in the middle of the table. The vertical and horizontal readings of the level gauge should not exceed 0.03/100. 3.2 During the inspection, the actual inspection sequence can generally be arranged according to the requirements of the installation and disassembly inspection tools and the inspection items. 3.3 The working accuracy inspection should be carried out after the test piece is ground. 3.4 The direction parallel to the I-shaped groove of the worktable is called the vertical direction, and the horizontal distance perpendicular to the D-shaped groove of the worktable is called the horizontal distance. 3.5 The inspection items specified in this standard are for machine tools that grind the grinding wheel in a vertical position. For machine tools that grind with grinding wheels in the horizontal plane, when inspecting their geometric accuracy, the tolerance value of item a in the vertical half plane of G5, G6 and G7 shall adopt the tolerance value of item b in the horizontal half plane specified in this standard; similarly, the tolerance value of item 6 in the horizontal half plane shall adopt the tolerance value of item a in the vertical half plane specified in this standard. Approved by Machine Industry Week on 1999-05-20, implemented on 2000-01-01, JB998.1-1999, using the standard #. Its specifications are as follows: 0001/20.0, tt||Return to European Press, JB/T 9918.1-1999
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