A method and tool for machining the inner surface of hydraulic jaws by wire cutting

Abstract

The invention relates to a method and tools for using wire cutting to machine the inner surface of a hydraulic clamp jaw plate. The method include the steps of tool manufacturing, wire cutting program compiling, workpiece positioning and mounting, trial machining and inspecting. The tools include a clamp body, cylindrical pins and adjusting screws, the clamp body is composed of a baseplate and two side plates, positioning holes are formed in positions, corresponding to hydraulic clamp jaw plate mounting holes, of the baseplate, the baseplate is fixed through the cylindrical pins, and the adjusting screws are symmetrically arranged at positions, corresponding to planes on two sides of the hydraulic clamp jaw plate, of the side plates. Compared with the prior art, the method and the tools have the advantages that conventional machining processes are replaced, and machining efficiency is improved by designing and manufacturing the jaw plate wire cutting tools and compiling a wire cutting program; the method is simple and reliable in operation, high in machining accuracy, capable of realizing repeated machining once after the program is set, constant in machining accuracy and especially suitable for mass production of the hydraulic clamp jaw plate; the hydraulic clamp jaw plate is high in interchangeability when jaw teeth are mounted, so that convenience is brought to user's use, and a good reception from users is acquired.

Description

technical field [0001] The invention relates to a processing method of a jaw plate of a hydraulic plier, in particular to a method for processing the inner surface of a jaw plate of a hydraulic plier by wire cutting and a tool used therefor. Background technique [0002] The hydraulic tong is an automatic make-up machine for screwing casing and drill pipe in the oil field drilling process. The jaw plate is the main part of the hydraulic tong. Its inner surface shape is relatively complex, including arc surface, V-shaped groove, straight line section and transition fillet. , where the V-shaped groove is used to install the jaws, and the dimensional tolerance of the V-shaped groove and the shape and position tolerance of the mounting hole of the jaw plate of the hydraulic pliers are relatively high. (Such as image 3 Shown is the part diagram of the 8-inch hydraulic jaw plate) [0003] The traditional method of processing the inner surface of the jaw plate of the hydraulic pl...

AI Technical Summary

Problems solved by technology

This kind of process method has many procedures, is labor-intensive and time-consuming, and it is difficult to guarantee the machining accuracy, and the quality inspection workload is relatively large during mass production; in addition, the interchangeability between the finished workpiece and the jaws is poor, because it needs to be assembled in the V-shaped groove. The jaws are vulnerable parts, which often need to be replaced during use, and the poor interchangeability has caused great inconvenience to users during use

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