JB/T 2999.3-1998 Technical requirements for camshaft grinding machines

This standard specifies the requirements for the manufacture and acceptance of ordinary precision camshaft grinders. This standard applies to ordinary precision camshaft grinders with a maximum workpiece rotation diameter of 125 to 200 mm and a maximum workpiece length of 315 to 2000 mm. JB/T 2999.3-1998 Technical requirements for camshaft grinders JB/T2999.3-1998 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2999.3—1998
Camshaft Grinder
Technical Conditions
Published on July 17, 1998
National Bureau of Machinery Industry
Implemented on December 1, 1998
JB/T2999.3—1998
This standard has revised JB3024-81 "Technical Requirements for Manufacturing and Acceptance of Camshaft Grinders" based on the structural characteristics of camshaft grinders and the requirements of users. It is a specificization and supplement to GB9061-88 "General Technical Conditions for Metal Cutting Machine Tools" and other standards.
The main differences between this standard and JB/T3024-81 are: the addition of three chapters: "reference standards", "general requirements" and "accessories and tools"; the addition of technical requirements such as the reverse idle stroke and cleanliness of the handwheel (handle). This standard is part of the camshaft grinder series standards. JB/T2999, under the general title of "Camshaft Grinder", includes the following three parts:
Part 1 (i.e. JB/T2999.1): Parameters; Part 2 (i.e. JB/T2999.2): Accuracy inspection; Part 3 (i.e. JB/T2999.3): Technical conditions. This standard will replace JB3024-81 from the date of implementation. This standard was proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Grinding Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Changchun No. 1 Machine Tool Factory. This standard was first issued in December 1981.
1 Scope
Machinery Industry Standard of the People's Republic of China
Camshaft Grinder
Technical Conditions
This standard specifies the requirements for the manufacture and acceptance of ordinary precision camshaft grinders. JB/T2999.3—1998
Replaces JB3024—81
This standard applies to ordinary precision camshaft grinders with a maximum workpiece rotation diameter of 125~200mm and a maximum workpiece length of 315~2000mm.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB9061—88
JB/T2999.2—1998
JB/T9872—1998
JB/T98741998
JB/T9877—1998
JB/T10051—1998
3 General requirements
General technical conditions for metal cutting machine tools
Precision inspection of camshaft grinders
General technical conditions for machined parts of metal cutting machine tools General technical conditions for assembly of metal cutting machine tools Determination of cleanliness of metal cutting machine tools
General technical conditions for hydraulic systems of metal cutting machine tools When acceptance is carried out according to this standard, the remaining acceptance items in GB9061, JB/T9872, JB/T9874 and other standards that have not been concretized in this standard must be inspected at the same time.
4 Accessories and toolswww.bzxz.net
4.1 Generally, the accessories and tools listed in Table 1 should be supplied randomly. 4.2
According to the user's requirements, special accessories related to expanding the performance of the machine tool can be supplied according to the agreement. Approved by the State Bureau of Machinery Industry on July 17, 1998 and implemented on December 1, 1998
Coolant tank
Grinding wheel balancing spindle
Grinding wheel dresser
Grinding wheel chuck
Special tools necessary for adjusting the machine tool
Grinding wheel removal tools
Headstock center
Tailstock center
Measuring device
Profiling tool
5 Processing and assembly quality
JB/T2999.3—1998
Accessories and tools
One size for each (without diamond drill)
To be determined by the manufacturer
To be determined by the manufacturer
Measuring table base, bridge plate
Including small grinding wheel and chuck
Bed, pad, headstock, grinding wheel frame and workbench are important castings and must be aged after rough machining. The transverse guide pair is an important guide pair, and rolling guides and other wear-resistant measures should be adopted. The following joint surfaces should be assessed according to the requirements of "particularly important fixed joint surfaces": 5.3
a) The joint surface between the combined bed:
b) The joint surface between the grinding wheel frame pad and the bed:c)) The joint surface between the cradle support and the workbench;d) The joint surface between the head frame shell and the cradle:
e) The joint surface between the guide wheel frame base and the workbench surface;f The joint surface between the grinding wheel dresser and the installation reference. 5.4 The longitudinal and transverse guide pairs of the bed and the guide pairs of the dresser should be assessed according to the requirements of "static pressure, sliding (rolling) guides" 5 The guide surface of the cradle and its matching tailstock should be assessed according to the requirements of "displacement guides". 5.5
The reverse idle stroke of the handwheel (handle) with a scale device for the main feed should not exceed 1/15r. 5.6
5.7 The operating force of the dresser handwheel and the cross feed handwheel (at low speed) shall be assessed according to the requirements of the "frequently used" handwheel; the operating force of the cross feed handwheel at high speed shall be assessed according to the requirements of the "infrequently used" handwheel, and the operating force of the tailstock sleeve handle shall be assessed according to the design requirements. 3 The driving motors of the headstock, grinding wheel headstock, die-forming abrasive tool and oil pump shall be dynamically balanced together with the pulley or coupling and calibrated separately. 5.8
The double amplitude value of vibration caused by the residual unbalance shall not be greater than the provisions in Table 2 Table 2 Double amplitude of motor vibration
Grinding wheel and die-forming abrasive tool motor
Headstock and oil pump motor
Double amplitude value of vibration
9 Check the cleanliness according to the provisions of JB/T9877. When the grinding wheel spindle bearing is a sliding bearing, the internal cleanliness of the grinding wheel headstock components shall be inspected by weight 2
JB/T2999.31998
method. The impurities and dirt shall not exceed 200mg: When the grinding wheel spindle bearing is a rolling bearing, it can be inspected by visual inspection or touch method. 6 Machine tool idling test
6.1 Temperature rise test
The idling time of the grinding machine shall not be less than 4h, of which the high-speed running time shall not be less than 1h, so that the spindle bearing reaches a stable temperature. The temperature and temperature rise of the bearing shall be measured on the housing close to the spindle bearing or in the system oil pool. The value shall not exceed the provisions of Table 3. Table 3 Temperature and temperature rise
Bearing type
Sliding bearing
Rolling bearing
6.2 Grinding wheel frame spindle system idling power test (spot check) Temperature
Grinding wheel frame spindle system idling power shall not exceed 15% of the grinding wheel frame no-load power index value Note
1 Select 10 sets of grinding wheel frames with good assembly quality, measure their idling power, and take the average value as the grinding wheel frame idling power index. 2 The motor no-load power shall be deducted during measurement and inspection. 6.3 Hydraulic system stability test
The hydraulic system stability test time shall not be more than 10min. 7 Machine tool load test
This series of machine tools should be tested when the grinding wheel frame reaches the maximum power or the maximum power specified by the design). The test conditions and cutting amount are specified by the manufacturer.
8 Machine tool accuracy inspection
8.1 The machine tool accuracy inspection shall be carried out in accordance with JB/T2999.2. 8.2 G10, G13, P1 and other items shall be inspected when the machine tool reaches stability. 8.3 During the working accuracy test, the following grinding specifications can be referred to: the headstock speed is 12~25min
The grinding wheel frame precision cutting speed is less than 0.30mm/min; the cutting amount is 0.10mm (radial direction);
The dwell time is less than or equal to 30s.
8.4 During the working accuracy inspection, the maximum allowable value of the surface roughness R of the test piece is 0.63um. 8.5 The additional accuracy test items are as follows:
a) Feed the grinding wheel frame transverse feed continuously for 10 times in the same direction with the minimum scale value of the grinding wheel frame, and check the accuracy of the grinding wheel frame transverse feed. The feed error of each time shall not exceed 100% of the minimum feed scale value, and the cumulative error shall not exceed 150% of the minimum feed scale value; b) Feed the grinding wheel dresser continuously for 10 times in the same direction with the minimum scale value of the grinding wheel dresser, and check the synchronization accuracy of the automatic dressing and transverse feed automatic compensation of the grinding wheel dresser. The error of each automatic feed compensation shall not exceed 100% of the minimum scale value, and the cumulative compensation error shall not exceed 150% of the minimum scale value. The calculation formula is shown in formula (1) and formula (2): 3
Where: an—
actual feed amount each time;
JB/T2999.3—1998
S each time
S10 times
b minimum scale value after feeding;
8 must be changed to the absolute error value each time;
810 times
—10 times absolute error value.
×100%
) The quick introduction time of the grinding wheel frame shall not exceed 3s, and there shall be a buffer (continuous inspection for 6 times). 4
Mechanical Industry Standard
Technical Specifications for Camshaft Grinding Machines
JB/T2999.3—1998
Published by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Print Sheet 1/2
Word Count 10000
First Printing in December 1998
First Edition in December 1998
Print Quantity 00,001-500
Cost 5.00 Yuan
98-154
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