JB/T 9925.2-1999 This standard is a revision of ZBn J55 051-90 "Technical conditions for worm grinders". During the revision, editorial modifications were made according to relevant regulations, and the technical content has not changed. This standard is part of the JB/T 9925 "Worm grinder" series of standards, which includes the following two parts: JB/T 9925.1-1999 Accuracy inspection of worm grinders JB/T 9925.2-1999 Technical conditions for worm grinders This standard specifies the requirements for the manufacture and acceptance of worm grinders. This standard is applicable to mobile table and ordinary precision worm grinders with a maximum workpiece diameter of 125~320mm and a maximum workpiece length of 500~2500mm. This standard was first issued in July 1990. JB/T 9925.2-1999 Technical requirements for worm grinders JB/T9925.2-1999 Standard download decompression password: www.bzxz.net

1 s 2.08,99
Machinery Industry Standard of the People's Republic of China
JR/T 9925.1~9925.2—1999
Worm Grinding Machine
Published on 1999-05-20
Guangzhou Machinery Industry Bureau
2000-01-01 Implementation
JD.T9925.2-1999
This standard is a revision of 2Bn"55D51:-90 gauge rod sub-technical conditions", only the relevant provisions were edited or revised, the technical content has not changed,
This standard is also a consolidation and supplement of GB/T9925 Worm Gear Machine Tool General Technical Requirements GB/T9925-1988 Metal Cutting Machine Tool General Technical Requirements GB/T9925-1999 Worm Gear ... The standard is under the jurisdiction of the Grinding Machine Branch of the Machine Tool Standardization Technical Committee. The responsible unit for this standard is: Hanjiang Thread Grinding Machine Research Institute. This standard was issued in July 2000.
1 Fannan
The Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Worm Grinding Machines
This standard specifies the requirements for the manufacture and inspection of worm grinding machines. JB T9925.2—1999
This standard is applicable to ordinary worm cabinet grinders with movable workpieces with a diameter of 125-320mm and a maximum length of 500--2500mm.
2 Referenced Standards
The clauses contained in a standard are all referenced in this standard and are valid at the time of publication of this standard. All standards are subject to revision. Parties using this standard should consider the possibility of using the latest versions of the following standards: G/T1031—1995
G/T 5226.1—1996
GB.T9061-1988
GB15760[995
GB/T 167691997
JB 4029—1985
JB/T9872—1990
JB/T 9874—1999
JB/T 9876--. 1999
JB/T987T:1999
9874.1999
IB/T9925.1—1999
J/T[005—1999
General requirements
Surface roughness value change
T Machinery and equipment for metallurgy - Part: Technical conditions for use General technical conditions for metal cutting machine tools
General technical conditions for safety protection of metal cutting machine tools Noise level measurement of metal cutting machine tools Grinding wheel protective cover Safety protection technical requirements for metal cutting machine tool machining parts General Technical conditions General technical conditions for metal cutting machine tool assembly
Metal cutting machine tool joint surface residual color method inspection and evaluation Metal cutting machine tool cleanliness determination
Metal cutting machine tool oil mist concentration adjustment force method
Exhaust rod grinder precision inspection
Metal cutting machine tool fluid system technical conditions When accepting machine tools according to this standard, it is necessary to simultaneously inspect the redundant acceptance items in GB 9061, JB/T98-2, JB/T9874 and other standards that have not been standardized
4 Accessories and tools
The accessories and tools listed in the table below should be provided randomly. National machine Machinery Industry Island 1999-05-20 approved 2000-01-01 implementation
cold sales
grinding wheel balance
grinding wheel plate
dismantling Lang grinding wheel wrench
stop free head
whole body can be used inside the special tool
static correction of various tooth shapes (angle, thanks to
continuous type, Arcimide butterfly line monitoring, extended
long and gradual linear type grinding wheel leisure
European tax correction device
sample assembly mother
3 safety and health
JB/T99252—1999
cold, Suction
Flat pre-gun
Flat tearing grinding wheel
Clamping wheel
Removing silicon
Drive 1 piece
Support rate 1. Piece
Xie points, Kesheng
Repair these wheels
According to the correct matching wheel
Egg fertilizer, sample
The number of electric roots depends on
5.1 When the grinding wheel spindle uses static bearings, the grinding wheel can be started after the static pressure axis pump of the wheel spindle is started and the oil pressure reaches the specified value. 1, tt||5.2 The worktable running stroke limit device and the stop opening when the work reversing switch fails. 5.3 The machine tool is working. Before the indexing action is completed, the worktable and the dial cannot be turned into the grinding stroke. 5. After the grinding wheel frame is quickly withdrawn, the hydraulic frame sleeve shall not be withdrawn. 5.5 The grinding wheel anti-expansion ticket shall comply with the provisions of [H9879]: The working platform protection shall be possible. 5.6 Inspect the oil concentration that may be generated by the machine tool according to the provisions of [H9879] and meet the requirements. 5.7 Inspect the noise of the machine tool according to the provisions of GB16769. When the machine tool is tested under no-load conditions, the noise level of the whole machine shall not exceed 75dB (A
5.8 When accepting the machine tool according to the standard, the company must also inspect the remaining items specified in GB15760 and the standards such as B/T5226.1 and B10051 for two months. 6 Processing and assembly quality
6.1 In addition to the front guide rail pair of the machine body, take measures to ensure that the machine body is resistant to the impact. 2
JB/T9925.21999www.bzxz.net
62 The quality point, workpiece, wheel frame and shell are important castings. They must be treated with the second aging treatment after semi-finishing. 1. After the trace is semi-finished, the bed guide and its matching parts must be tested according to the number of "static pressure, full (painted) rail" The requirements for special inspection and its indicators and evaluation methods shall be in accordance with the requirements of JB Road 76.
6.4E. The guide rails of the work table and the frame shall be assessed according to the requirements of "transfer guide rails". 6.5 The following joints shall be assessed according to the requirements of "particularly important joint surfaces" a! The joint surface between the tailstock body shell and the bottom attachment:
b) The joint surface between the headstock and the workpiece:
c: The joint surface between the grinding wheel frame plate and the bed;
! The joint surface between the grinding wheel shaft body and the grinding wheel frame, 6.6 Feed handwheel, worktable quick reversing handle change longitudinal force full "used" handwheel requirements assessment: a) The reverse clearance of the feed handwheel is 1/40r; b) Other handwheels, handwheels and handwheels with special requirements shall be assessed according to the design requirements, 6.7 According to the tracking/T9877, the cleanliness of the machine tool shall be inspected. During the inspection, the grinding wheel shall not be contaminated with internal dirt and dirt. The grinding wheel shall not exceed 200mB-6.8 The driving motor of the grinding wheel frame shall be dynamically balanced together with the pulley and stopped. After the stop, the residual imbalance and the double amplitude of the vibration shall not be less than 2μm
7 Machine tool idling test
7.1 The idling test time of the machine tool shall not be less than 4h. The idling test of the grinding wheel spindle shall only test one speed, but shall be equipped with a load equivalent to the same vertical recording of the grinding wheel. When measuring temperature rise, the wheel spindle should generally be at zero position and one position of positive and negative maximum temperature rise angle respectively: the temperature rise value shall not exceed 25T
7.1 When the wheel frame is running, the idling power of the grinding wheel shaft shall not exceed the specified value of the design. 7.3 Wheel frame feeding accuracy test: feed automatically or manually, each time feed a minimum scale value (avoid small feed) for a total of ten times. The error of each feed shall not exceed 100% of the scale value, and the cumulative error of ten feeds shall not exceed 200% of the scale value. Error calculation formula:
Each feed error
Cumulative error of consecutive feeds=
Where: α—actual feed value each time;
—nominal feed value.
「2】
了.4T. When the shaft is running, the difference between the actual speed and the nominal speed shall not exceed 10%. There shall be no shaking or creeping during low-speed operation, and the overrun shall not exceed 1 during rapid braking. B Load test of machine tools (drawing pot)
For this series of machines, only the maximum load test and the test of the main transmission system reaching high power (independent inspection) of the machine tool are carried out. The maximum load and maximum power of the machine tool are determined by the design. And it shall be written in the manual, 13| |tt||9 Machine tool precision inspection
B9922—199
9.1 Machine tool precision inspection According to J39925.1, 9.2T, when the surface roughness R of the test piece is inspected, the surface roughness R of the test piece (according to GD/T1031-1995) is as follows: screw test piece, 0.32μm;
normal straightness frequency standard test, 0.63m;
coated mead sheet test piece, 0.32μm
9.31.The surface roughness of the test piece after fine separation shall be inspected by visual inspection, and no obvious roughness is allowed. 9.4 The geometrical accuracy G2, G3, G7 and working accuracy shall be inspected when the machine tool reaches a stable temperature. 14
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