Processing method for wedge block of wedge block-type overrunning clutch

A technology of overrunning clutch and processing method, which is applied in the processing field of overrunning clutch, and can solve the problems of wedge manufacturing precision error, error accumulation, wedges that are difficult to meet product requirements, etc.

Active Publication Date: 2012-10-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the two processes of cold drawing and heat treatment will cause large errors in the manufacturing accuracy of the wedge due to thermal expansion and contraction,

Method used

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  • Processing method for wedge block of wedge block-type overrunning clutch
  • Processing method for wedge block of wedge block-type overrunning clutch
  • Processing method for wedge block of wedge block-type overrunning clutch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The processing method embodiment of sprag type overrunning clutch sprag is given below (referring to Figure 1~3 ):

[0018] 1. Using bearing steel (GCr15), after cold drawing and cutting, a wedge with a margin of 0.02~0.04mm on one side is manufactured (see figure 2 ), after vacuum quenching and tempering, the hardness reaches HRC60~64, and then polishing (20~40min) with a polishing machine to remove surface oil and corners.

[0019] 2. Carry out sandblasting treatment on the wedge, and use corundum as the sand grain. The compressed air used for sandblasting must be clean and dry, and the air pressure is 6-8MPa. The blasting depth is 0.02-0.04mm.

[0020] 3. Clean the formed wedges: put the wedges into the mixer, then add hot water with a temperature of 40-80°C, and stir and clean them;

[0021] 4. Use the extruder to pass the cleaned wedge through the forming die (see image 3 ). The dimensional accuracy and surface roughness of the obtained wedge are close to ...

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Abstract

A processing method for the wedge block of a wedge block-type overrunning clutch relates to a processing method for the overrunning clutch. The processing method provided by the invention has higher manufacturing accuracy, can prolong the service life of the clutch, and comprises the following steps: a wedge block, of which a single side has a margin ranging from 0.02 to 0.04 mm, is manufactured by conducting cold drawing and cutting off on bearing steel (GCr15); after vacuum quenching and tempering, the wedge block is polished with a polishing machine to remove surface oil stain and edges; sand blasting is conducted on the wedge block; the formed wedge block is cleaned; and the cleaned wedge block passes through a forming mold under the action of an extruder, so as to obtain the wedge block of the wedge block-type overrunning clutch after processing.

Description

technical field [0001] The invention relates to a processing method for an overrunning clutch, in particular to a processing method for a wedge of a sprag type overrunning clutch. Background technique [0002] Wedge type overrunning clutch is a device for one-way transmission of power, widely used in aircraft, tanks, military trucks, off-road vehicles, lathes, textile machinery, intermittent transmission mechanisms of automatic production lines, etc. The existing sprag-type overrunning clutch includes an inner ring and an outer ring with slideways, and a special-shaped block (that is, a wedge) and a cage with a spring are arranged between the inner and outer slideways. The wedge is an extremely important part in the sprag type overrunning clutch, which plays an important role in the transmission of the clutch, and its manufacturing precision and strength will have an important impact on the service life of the entire overrunning clutch. The existing wedge is processed by fo...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 许水电杜迪康黄辉刘静静王鸿雁
Owner XIAMEN UNIV
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