Method for machining universal robot welding fixture of middle-large size excavator movable arm and supporting base

Abstract

The invention provides a method for machining a universal robot welding fixture of a middle-large excavator movable arm and a supporting base. Firstly, an appropriate plate is selected for serving as a base; secondly, a first positioning pin is assembled on a welding robot working table on one side; the base is locked on the welding robot working table; two second positioning pins are assembled in the middle of the base, and the second positioning pins are in interference fit with the base; two holes are drilled in the rear side of the base, threaded rods are inserted into the holes, and positioning sleeves are assembled on the threaded rods; a workpiece is placed on the base, positioned and locked; an U-shaped hole is machined in the front side of the base, and pressing plates are installed in the U-shaped hole, so that the pressing plates are made to press and firmly lock the workpiece. According to the provided method, the defects in the prior art are overcome, welding precision is high, machining time is short, in addition, performance is reliable, precision of installation positions of the movable arm and a bucker rod is guaranteed, and then using performance and reliability of the movable arm are guaranteed.

Description

technical field [0001] The invention relates to a processing method of a universal robot welding tool for a medium and large excavator arm support, and belongs to the technical field of excavator arm processing. Background technique [0002] The hydraulic excavator is a self-propelled construction machine. The realization of functions, the transmission of power, and the execution of movements in the operation process must be implemented on the structures and components of each department. Therefore, the structural design of the hydraulic excavator is the key to determine the performance, reliability, quality and manufacturing cost of the whole machine. Among them, the boom, stick and bucket are the working devices of the excavator, and they are also the executive components of the excavator. The processing and welding of these components are the key points we need to consider to ensure the performance and reliability of these structural parts. As far as the boom is concer...

AI Technical Summary

Problems solved by technology

[0003] In the previous design, the hinged support of the excavator arm and stick is generally welded by manual measurement and positioning, which can neither ensure accurate positioning nor ensure the appearance of the weld and the shape of the welded section.

[0004] In the later period, by improving its structure and welding process, robot welding was adopted, that is, processing was carried out on the worktables of two welding robots. This required a welding tool to fix the workpiece so that it could be processed by the welding robot, and the use of the boom could be realized. The performance and reliability of robotic welding tools have not been reported publicly

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