Assembly method of timing chain

An assembly method and chain technology, applied in the direction of metal chains, etc., can solve the problems of difficult operation, low assembly efficiency, misoperation, etc., and achieve the effect of reducing initial elongation and improving fatigue strength

Active Publication Date: 2018-05-01
NANJING LIMIN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a timing chain assembly method to solve the problem of difficult operation, low assembly efficiency, and easy misoperation in the method of assembling the chain by matching marks proposed in the above-mentioned background technology

Method used

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  • Assembly method of timing chain

Examples

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Embodiment 1

[0059] A method for assembling a timing chain, comprising the following steps: sleeve selection, pin blanking, centerless grinding, pin selection, inner and outer plate blanking, inner plate string inspection, chain assembly, pre-drawing the lower joint, measuring Length, ring head run-in, rolling, cleaning, oiling and packaging, the assembly method of the timing chain, the specific steps are as follows:

[0060] S1: Socket sorting: Pour the socket into the string inspection box, string it into the hand fork, and then visually select it to pick out cracks, large gaps, spots, pitting, rust, hard marks, and crooked sockets Unqualified products with defects on the surface are reserved;

[0061] S2: Pin shaft blanking: The operator manually changes the 70KG large roll of pin shaft wire into a 20KG small roll of pin shaft wire and places it on the material rack of the pin shaft blanking machine, and pinches off the wire by 5mm with a hand vise , and then use a small assorted file ...

Embodiment 2

[0102] A method for assembling a timing chain, comprising the following steps: sleeve selection, pin blanking, centerless grinding, pin selection, inner and outer plate blanking, inner plate string inspection, chain assembly, pre-drawing the lower joint, measuring Length, ring head run-in, rolling, cleaning, oiling and packaging, the assembly method of the timing chain, the specific steps are as follows:

[0103] S1: Socket sorting: Pour the socket into the string inspection box, string it into the hand fork, and then visually select it to pick out cracks, large gaps, spots, pitting, rust, hard marks, and crooked sockets Unqualified products with defects on the surface are reserved;

[0104] S2: Pin shaft blanking: The operator manually changes the 90KG large roll of pin shaft wire into a 30KG small roll of pin shaft wire and places it on the material rack of the pin shaft blanking machine, and pinches off the wire by 10mm with a hand vise , and then use a small assorted file...

Embodiment 3

[0145] A method for assembling a timing chain, comprising the following steps: sleeve selection, pin blanking, centerless grinding, pin selection, inner and outer plate blanking, inner plate string inspection, chain assembly, pre-drawing the lower joint, measuring Length, ring head run-in, rolling, cleaning, oiling and packaging, the assembly method of the timing chain, the specific steps are as follows:

[0146] S1: Socket sorting: Pour the socket into the string inspection box, string it into the hand fork, and then visually select it to pick out cracks, large gaps, spots, pitting, rust, hard marks, and crooked sockets Unqualified products with defects on the surface are reserved;

[0147] S2: Pin shaft blanking: the operator manually changes the 80KG large roll of pin shaft wire into a 25KG small roll of pin shaft wire and places it on the material rack of the pin shaft blanking machine, and clamps off the wire by 8mm with a hand vise , and then use a small assorted file t...

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Abstract

The invention discloses an assembly method of a timing chain in the technical field of chain assembly. The assembly method comprises the steps of sleeve sorting, pin shaft blanking, centerless grinding, pin shaft sorting, inner and outer piece blanking, inner piece string checking, chain assembly, lower section pre-stretching, length measurement, ring head closing, rolling inspection, cleaning, oil removal and packing. Raw materials with defects on the surfaces are eliminated in the raw material selecting phase to greatly improve the pass percent in the raw material primary production phase; through the procedures of lower section pre-stretching, ring head closing and finished product length measurement, the pass percent of timing chain products is guaranteed; inner and outer chain platesof the timing chain and a cover plate are riveted through cover pieces to guarantee flexibility of each chain link of the timing chain and to prevent the tooth jumping phenomenon; and the assembly method of the timing chain prevents the defects of high operation difficulty, low assembly efficiency and easy generation of wrong operations in a traditional chain assembly method through pairing and marking, and is flexible and accurate in assembly mode and high in assembly efficiency.

Description

technical field [0001] The invention relates to the technical field of chain assembly, in particular to an assembly method of a timing chain. Background technique [0002] In recent years, the chain transmission system has been widely used in the timing transmission of automobile engines. Some congenital deficiencies in the performance of gear transmission and belt transmission have been overcome, and new use value has been added to the end user of the car, showing its broad market application prospects day by day. The job of the timing chain is to rely on high-strength metal chains to connect the sprockets of components such as the crankshaft and camshaft and keep them running synchronously. [0003] In order to match the valve timing of the engine, the timing chain must meet the relative position requirements of the camshaft timing transmission sprocket and the crankshaft timing sprocket during assembly, and the crankshaft, intake and exhaust camshafts and oil pumps are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21L9/06
CPCB21L9/065
Inventor 许杨印宁林
Owner NANJING LIMIN MACHINERY
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