Cover assembly static separation durability test:
1. Test conditions
A. The separation stroke should meet the following requirements (the general durability test and the enhanced durability test are equivalent):
Clutch category | Separation stroke | |
General endurance test | Enhanced durability test | |
Coil spring clutch | Separation stroke specified by the pattern | The separation stroke specified by the pattern +1.5mm |
Pull-type diaphragm spring clutch | Separation stroke specified by the pattern | The separation stroke specified by the pattern +1.5mm |
Push diaphragm spring clutch | Separation stroke specified by the pattern | The separation stroke specified by the pattern +1.5mm |
B. Separation frequency: no more than 3Hz
C, test temperature: room temperature
2, test equipment
Select clutch endurance fatigue test bench
3. Test procedure
A, cover assembly separation characteristics determination test steps
1 Fix the cover assembly to the test fixture according to technical requirements, so that the pressure plate is at the working point.
2 Pre-load 100N on the separation finger (rod) end, or according to the technical requirements of the corresponding drawings. This state is defined as a bit.
3 Operate the loading device so that the substitute separation bearing stroke reaches the specified separation stroke, and the action is performed 3 to 5 times.
4 Operate the loading device to disengage the clutch until the maximum separation stroke is reached. The clutch is then engaged and returned to the displacement zero position; during this process, the separation force and the platen displacement at three points evenly distributed along the circumferential direction of the clutch average diameter are measured and recorded.
B, cover assembly load characteristics determination test steps
1 Fix the cover assembly to the test fixture so that the pressure plate is in a free state.
2 pairs of platen loading. The coil spring clutch is loaded so that the pressure plate exceeds the working point position by about 2.5 mm; the diaphragm spring clutch is loaded so that the pressure plate is displaced by about 1 mrn from the bottom valley point. Then reduce the load until the full load is removed and record the value of the load on the platen as a function of the platen displacement.
3 Determine the position of the feature point using the specified test pad or other method to determine the corresponding load characteristic value.
C. Determine the separation force and separation force of the cover assembly according to the separation characteristics and load characteristics of the cover assembly according to A and B, and determine the working pressure of the cover assembly, the separation force and the plate lift.
D. The cover assembly and the driven disc assembly are mounted in the test rig, and the driven disc assembly can be replaced by a spacer corresponding to the nominal thickness of the driven disc assembly.
E. Separate and join once according to the specified separation stroke, which is one cycle.
F. Reciprocating cycle to the specified number of cycles or damage to the test piece.
G. Remove the cover assembly from the device and visually inspect for cracks, loose or broken parts.
Cover assembly dynamic separation durability test
1. Test conditions
A. Cover assembly speed: should not be lower than the following specified speed:
1 Mini car and car: 3000r/min
2 Light vehicle: 2000r/min
3 medium car: 1500r/min
4 Heavy vehicles: agreed
B. Separation frequency: no more than 2Hz
C. Separation schedule: as specified in the technical documents.
D. Release bearing: The bearing used in conjunction with the clutch.
E. Separation bearing eccentricity of clutch rotation center: 0.40mm
F, ambient temperature: room temperature or (100 ± 5) ° C.
2, test equipment
The lid assembly dynamic separation durability test bench that satisfies the above conditions.
3. Test procedure
A. According to the separation characteristics and load characteristics of the cover assembly according to A and B, the working pressing force, the separation force and the platen lift of the cover assembly are determined.
B. Mount the cover assembly, the driven disc assembly or the spacer corresponding to the nominal thickness of the driven disc assembly to the test stand.
C. Separate and join once according to the specified separation, which is one cycle.
D. Reciprocating to the specified number of cycles.
E. Remove the cover assembly from the device and visually inspect for cracks, loose or broken parts.
F. Determine the separation characteristics and load characteristics of the cover assembly, and determine the working pressing force, separation force and platen lift of the test cover assembly.
G. Determine the amount of wear of the separation finger (rod) end.
For details, please contact Jinan Zhongchuang Industrial Testing System Co., Ltd. 0531-85555885 15689703761 QQ3070594936
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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