A Processing Technology of Inner Cylinder Joint of Reverse Circulation Impactor

Abstract

The invention relates to a machining process for an inner cylinder joint of a reverse circulation impactor and solves the problem that a product hardly achieves the technical requirements. The quality is guaranteed, the machining precision is improved, and the reject rate in the production process is obviously reduced, so that the production cost is greatly lowered during batch production, the labor intensity is obviously reduced, and the product quality is improved. In the using process, the service life is prolonged, and the product is well-liked by customers.

Description

technical field [0001] The invention relates to a processing technology for an inner cylinder joint of a reverse circulation impactor. Background technique [0002] The inner cylinder joint is installed at the rear end of the reverse circulation impactor. It serves to connect the drill pipe and the outer casing, guide the piston movement, and control the air intake. It is a key part of the reverse circulation impactor. The previous processing method is : Material preparation→rough turning of outer circle→drilling and reaming→rough and fine turning of inner hole→finishing of outer circle→milling and air groove→heat treatment (infiltration of C and quenching)→finishing of internal and external threads→repair of chamfering→grinding of outer circle and Inner hole, the main defects of this process route are: ①, the clamping method is not uniform and the requirements are not clear enough; ②, the processing process is not refined; ③, after heat treatment, the hardness is low, the w...

AI Technical Summary

Problems solved by technology

[0002] The inner cylinder joint is installed at the rear end of the reverse circulation impactor. It serves to connect the drill pipe and the outer casing, guide the piston movement, and control the air intake. It is a key part of the reverse circulation impactor. The previous processing method is : Material preparation→rough turning of outer circle→drilling and reaming→rough and fine turning of inner hole→finishing of outer circle→milling and air groove→heat treatment (infiltration of C and quenching)→finishing of internal and external threads→repair of chamfering→grinding of outer circle and Inner hole, the main defects of this process route are: ①, the clamping method is not uniform and the requirements are not clear enough; ②, the processing process is not refined; ③, after heat treatment, the hardness is low, the wear resistance is poor, the strength does not meet the requirements, and the deformation is large ; ④, the processing accuracy is difficult to meet the drawings, so this process cannot meet the technical requirements, resulting in a large number of waste and defective products, which not only increases the production cost, but also increases the labor intensity, making the quality of processed products uncontrollable. It has always been the main reason for high processing cost (too high scrap rate), high labor intensity and difficult quality control