A chain link processing method

Abstract

The invention discloses a chain link machining method, and relates to a hole machining method of a track link of a large engineering machine. The method comprises following steps that two chain pieces are placed in a side lying manner in the length direction and are horizontally and symmetrically spaced and fixedly clamped; a chain piece machining device is started, two synchronously-symmetric movable drill tools on the chain piece machining device are controlled to move to the positions above first bolt holes, the positions of the first bolt holes are first displacement points, drilling machining of the two first bolt holes begins to be carried out until machining is completed, and ascending is carried out; the two drill tools are moved to second displacement points, and the second displacement points are the ends of the vertical distances of the first bolt holes and second bolt holes; the two drill tools continue to move to the positions above the second bolt holes, the positions are third displacement points, drilling machining of the two second bolt holes begins to be carried out until machining is completed, and ascending is carried out; and the two drill tools return to the initial positions. According to the method, the machining time can be shortened, the machining efficiency is improved, and the structural symmetric precision of machining of two chain pieces is further improved.

Description

technical field [0001] The invention relates to a processing method of a crawler chain link of a large-scale construction machine, in particular to a processing method of a hole on the chain link. Background technique [0002] The chain link is an important part of the crawler on some crawler-type large-scale mechanical engineering equipment such as cranes, cranes, bulldozers, etc. It is usually assembled by two symmetrical chain pieces to form a section (that is, a pair of chain pieces constitute a chain link section), so the structural symmetry accuracy of the two chain pieces in the same section is high. The chain piece body is usually a forged steel part. There are two left and right pin holes on the chain piece body and two perpendicular to the pin holes. Bolt holes, the two bolt holes are not on the same horizontal line and vertical line, the pin hole is usually a preliminary formed hole during forging, and then bored by a boring machine, and the bolt hole is later dri...

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Problems solved by technology

[0002] The chain link is an important part of the crawler on some crawler-type large-scale mechanical engineering equipment such as cranes, cranes, bulldozers, etc. It is usually assembled by two symmetrical chain pieces to form a section (that is, a pair of chain pieces constitute a chain link section), so the structural symmetry accuracy of the two chain pieces in the same section is high. The chain piece body is usually a forged steel part. There are two left and right pin holes on the chain piece body and two perpendicular to the pin holes. Bolt holes, the two bolt holes are not on the same horizontal line and vertical line, the pin hole is usually a preliminary formed hole during forging, and then bored by a boring machine, and the bolt hole is later drilled by a drilling machine Because it is an important component of the track chain link, the requirements for the relative position and machining accuracy of the pin hole and bolt hole are very strict, especially the structural symmetry accuracy requirements of the two chain pieces of the same section, while the existing The pin holes and bolt holes on the chain are processed separately, and there will be large errors in the symmetrical precision of the two chains in the same section, which will affect the service life and normal use of the track, and increase the unqualified processing. rate, and the existing processing methods are difficult to improve processing efficiency

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