JB/T 9918.2-1999- This standard is a revision of ZBn J55 028-88 "Technical requirements for the manufacture and acceptance of high-precision hob grinders". This standard specifies and supplements standards such as GB/T 9061-1988 "General technical conditions for metal cutting machine tools". This standard is part of the JB/T 9918 "High-precision hob grinder" series of standards, which includes the following two parts: JB/T 9918.1-1999 Accuracy inspection of high-precision hob grinders JB/T 9918.2-1999 Technical conditions for high-precision hob grinders This standard specifies the requirements for the manufacture and acceptance 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 1988. JB/T 9918.2-1999 Technical requirements for high-precision hob grinding machines JB/T9918.2-1999 Standard download decompression password: www.bzxz.net

1CS 25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T 9918.1~9918.2—1999
High Precision Hob Grinding Machine
1999-05-20 Issued
National Machinery Industry Bureau
2((H0-01-)1 Implementation
JD/T9918.2-1999
This standard is formulated on the basis of 2J55028-88 "Technical Requirements for Manufacturing and Acceptance of High Precision Hob Grinding Machines". This standard is an integration and supplement to GB/F9061—1988 General Technical Conditions for Pre-cutting Machine Tools and other standards. This standard is consistent with the technical content of ZnJ5502%—88. Only the relevant regulations have been re-edited: This standard is based on 991 8 "High Precision Roller Blade Grinding Machine" is a part of the series of standards. This series of standards includes the following two parts: IB/T9918.1-1999 High Precision Roller Blade Grinding Machine Sugar Content Inspection 1R/T9918.2-1999 Commercial Special Roller Blade Grinding Machine Technical System and the corresponding standards are:
JB 4095.E-1999 Roller Grinding Machine Seasonal Number This standard replaces ZBI1J5502888 from the date of implementation. This standard is issued by the National Gold The standard was proposed by the China Machine Tool Standardization Technical Committee. The standard was drafted by the China Machine Tool Standardization Technical Committee. The responsible person for drafting this standard is the China Machine Tool Research Institute. This standard was first issued in 1988.
1 Scope
Machinery Industry Standards of the People's Republic of China
Technical Conditions for High Precision Hob Grinding Machines
This standard specifies the requirements for the manufacture and acceptance of high precision hob grinding machines. This standard is applicable to the most Precision hob grinding machine for large hobs with direct control to 250mm. 2 Cited standards
JB/T9918.2—1999
Generation 7RnJ550288wwW.bzxz.Net
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the edition shown is valid. All standards will be revised. Therefore, the parties using the standard should explore the possibility of using the latest version of the following standards. GB/T [03] [995
GR/T5226.1—1996
G961--1988
GR 157601995
JB4029—1985
JB.T9872—1999
JB/T9874—1999
JB/T9877—1999
BT91—19
JB/T10051—1999
General requirements
Change of surface roughness parameters
Industrial electrical equipment Part 1: General technical conditions General technical conditions for metal cutting machine tools
General technical conditions for safety protection of metal cutting machine tools Technical requirements for safety protection of cross-bed grinding wheel guards for mechanical parts of metal cutting machine tools Technical conditions General technical parts for metal cutting machine tool assembly
Determination of the accuracy of metal cutting machine tools
Precision inspection of high-precision hob grinders
General technical conditions for the pressing system of metal prepress machine tools When accepting machine tools according to this standard, the remaining acceptance items in GB/T9061, JB/T9872, JB/T0874 and other standards that have been integrated into this standard must also be inspected:
4 Accessories and tools
4.1 The accessories listed in Table 1 and 1 tool should be supplied as auxiliary equipment. 4.2 Special accessories that expand the performance of machine tools are supplied according to user requirements and agreements. Approved by Guohao Machinery Industry Bureau on May 20, 1999, January 1, 2000 Implementation
Special workpiece head
Dividing or loading
Sand camel plate extraction sleeve
Elegant plaque plate
Cold loading industry
And wrench
5 Safety and health
JH/T9918.2-1999
For installation of solid rollers
For rotation of light moving parts
For standard indexing plate
Disassembly Grinding wheel flange
Comparison stone
Modification balance
Calibration meeting stone
Machine tool indexing
Solid grinding wheel
Clean wing
De-grinding
Complete machine tool
5.1 The longitudinal movement of the worktable should be equipped with a limit or anti-collision safety device, and it should be safe and reliable. 5.2 The grinding wheel protective cover should comply with the provisions of 4U29. 5.3 When the machine tool is working, there are parts with damage and cold printing sources, and generally there are protective devices. 5.4 The electrical system and hydraulic system should comply with the relevant provisions of GB/15226.1 and JB/T10051 respectively. 5.5 The safety protection of the machine should also comply with the provisions of GB【5760. Machining and assembly quality plate
.1 The bed and workbench rails are important guide pairs, and effective wear-resistant measures must be taken: 6.2 "The following important castings must be aged after rough machining, and the second aging treatment must be carried out in the semi-processing piece: a) Bed:
b) Workbench;
e) Box;
d) Column:
) Grinding head body;
r) Seat:
6.3 The guide pairs that match the bed and the workbench shall be assessed according to the requirements of "sliding () guide rails. 6.4 The following guide pairs and combinations shall be assessed according to the requirements of "moving guides":a) Guide pairs combined with the column slide:) The joint surface between the tailstock and the workbench:
] The interface between the grinding head guide.
JB/T9918.2-1999
6.5 The following joints shall be assessed according to the requirement of “special fixed joints”: 1) the joint surface between the head box and the working table; 2) the joint surface between the head slide and the vertical birch; 3) the joint surface between the sinusoidal mechanism shell and the bed. 6.6 The handwheel operating force should be balanced within the range of stable operation. The operating force should be assessed according to the provisions of Table 2. Table
Handwheel name
Workbench handwheel
Grinding head manual handwheel
Grinding head lifting handwheel
Handwheel screw longitudinal force
6.7 Check the cleanliness of the machine tool according to the provisions of B/T9877 and other relevant standards. The weight of the internal dirt of the head and axis shaft should not exceed 200mg~6.8 The grinding wheel spindle core machine is balanced and calibrated. After calibration, the other unbalanced quantities [vibration amplitude points are not greater than] 7.1 The machine tool shall be idle for no less than 4 hours. After reaching a stable temperature, the temperature and temperature rise of the outer shell near the grinding head spindle shaft shall be measured. The temperature and temperature rise of the bed tank (or oil tank) shall be measured. The value shall not exceed the specification of JBT100S1. 7.2 The idle power of the table head shall not exceed 15% of the specified index. Note! ... 9.2 The three inspections of G, G9 and P1 in JB rule 18.1 must be carried out when the machine tool reaches a stable temperature. 9.3 When inspecting the working accuracy, the surface roughness of the test piece shall be in accordance with the provisions of GB/T1031, and its R shall not be greater than 0.32m. 9.4 When inspecting the working accuracy, the non-reverse feed grinding after fine grinding shall not be greater than 10 cycles, 12
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