Fixing method and structure of copper backing plate for welding strip steel plate

Abstract

The invention relates to a method for fixing a copper base plate for welding of a strip steel butt-joint plate and a structure. The copper base plate is fixed to a base plate welding rack of a clamping device through a welding fixed check block and a bolt fixing pressing block; the welding fixed check block and the bolt fixing pressing block are arranged on the two longitudinal sides of the copper base plate respectively, the two corresponding side faces of the copper base plate are symmetrically chamfered along the horizontal axis, and the chamfering angle ranges from 45 degrees to 60 degrees; the sides, matching the copper base plate, of the welding fixed check block and the bolt fixing pressing block are inclined faces, and the inclination angle corresponds to the upper chamfering angle of the copper base plate; and countersunk bolt holes matching inner hexagon bolts are formed in the bolt fixing pressing block. The copper base plate is fixed in the manner of combining the welding fixed check block and the bolt fixing pressing block, so that fixing is reliable, and demounting and replacement are convenient; the double faces of the copper base plate can be utilized; the service life of the copper base plate can be prolonged in a multiplied manner; and production cost can be reduced.

Description

technical field [0001] The invention relates to a production auxiliary device for spiral welded pipes, in particular to a fixing method and structure of a copper backing plate used for welding strip steel plates. Background technique [0002] The role of the plate connecting device of the spiral welded pipe production line is to trim the head and tail of the flattened steel plate, and then connect the head and tail of the strip steel by welding. When welding, a copper backing plate is set under the butt joint of the strip steel, its function is to dissipate heat and improve the surface quality of welding. Such as figure 1 As shown, the copper backing plate in the currently used plate connection device is fixed on the clamping device of the plate connection device by hexagon socket head bolts. Due to frequent welding, the surface of the copper backing plate in contact with the strip steel often accumulates weld metal or is under welding. It is burned through when used for a...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the copper backing plate in the currently used plate connection device is fixed on the clamping device of the plate connection device by hexagon socket head bolts. Due to frequent welding, the surface of the copper backing plate in contact with the strip steel often accumulates weld metal or is under welding. It is burned through when used for a period of time, and needs to be replaced after a period of use; but because the upper surface of the copper backing plate is the working surface, the copper backing plate can only be used once because the copper backing plate is fixed with the hexagon socket head bolt and the countersunk bolt hole; The cost of parts is high, and the total length of the general connecting device is 2 meters. The copper backing plate needs 40 bolts to fix it in total. It is time-consuming and laborious to remove the bolts during replacement. Due to the wear and tear of the threaded holes of the original clamping device due to frequent replacement, re-drilling and tapping are required. ; Therefore, the copper backing plate currently used has the disadvantages of troublesome maintenance, long replacement time, short service life and high cost of the copper backing plate

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