Orientation clamping board of the automatic welding equipment with a big elbow

Abstract

The invention relates to a location clipboard of automatic welding machine for large elbow, comprising bottom part, left wing and right wing. The whole is in V-shape and the left wing is symmetric to the right wing. Circles set by any symmetric points on inner sides of two wings are coincidence with the cross section of large elbow which is set at two points. It comprises small arc, tangential plane of two circles, big arc and retaining part. There is a concave groove at the lower of small arc. The machining method is that the clapboard is produced by adopting marking and cutting method on steel plate; the clipboard is fixed on the automatic welding machine for large elbow according to certain way to form the clipboard location device. The clipboard produced by the method has performances of automatic centering and automatic aligning welding line and makes arch-shape welding line of workpeice is changed into ring automatic welding line. It solves difficult location problem in automatic welding for large elbow. The method provides a simple and easy production method for producing clipboards. The produced clipboard is provided with simple structure and low producing cost.

Description

technical field [0001] The invention relates to an automatic welding device, in particular to a workpiece positioning clamping plate and a processing method for the clamping plate of the automatic welding device for longitudinal arched seams of large-diameter elbows. Background technique [0002] At present, the welding of large elbow welds in my country adopts manual welding. The so-called large elbow is a large-diameter high-pressure steel pipe connector used in high-pressure pipelines such as oil transportation, gas transportation, and coal slurry transportation. The pipe diameter is above 630mm. These pipes usually withstand high pressure above 100MPa. As shown in Figure 1, the large elbow is formed by molding and welded by two semi-elbows with upper and lower symmetry. There are four welds, which are longitudinal arch welds AA' arc, CC' arc and longitudinal concave weld. Seam BB' arc, DD' arc, these four longitudinal arc welds are four equal-angle arcs of four concentr...

AI Technical Summary

Problems solved by technology

The two are different welds. The longitudinal arched weld of the large elbow cannot rotate around the axis of the workpiece itself to form a circular motion track like the circular seam welding, which brings great difficulties to automatic welding.

A positioning clamp for automatic welding of the longitudinal arch seam of a large elbow and a method for processing the clamp have not yet been found

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