Clamping forming core shaft of welding pipe and clamping adjustment

Abstract

A mandrel for clamping and shaping the pipe to be welded features that it has I-shaped clamping head, and the oblique press block, oblique supporting block and the spring and its holder are arranged in a slot. The lower end of I-shaped clamping head passes through the hole on oblique press block and is fixed to the oblique supporting block via screw. Its clamping regulation method is also disclosed.

Description

technical field [0001] The welding pipe clamping forming mandrel and the clamping adjustment method of the present invention belong to the field of metal plate processing and forming, and are mainly used for forming in the production process of large longitudinal submerged arc welded pipes, especially a forming used in the production process of plate edge bending mandrel. Background technique [0002] The coil forming in the production process of large straight seam submerged arc welded pipe is to bend the edge of the steel plate on the forming mandrel. There is an I-shaped chuck on the forming mandrel, and the edge of the steel plate is inserted into the forming mandrel. In the I-shaped chuck on the upper plate, the steel plate is curled after pressing the edge of the plate, and then the steel plate is released, and the other edge of the steel plate is inserted into the I-shaped chuck on the forming mandrel, and the steel plate is curled after pressing the edge of the plate...

AI Technical Summary

Problems solved by technology

[0002] The coil forming in the production process of large straight seam submerged arc welded pipe is to bend the edge of the steel plate on the forming mandrel. There is an I-shaped chuck on the forming mandrel, and the edge of the steel plate is inserted into the forming mandrel. In the I-shaped chuck on the upper plate, the steel plate is curled after pressing the edge of the plate, and then the steel plate is released, and the other edge of the steel plate is inserted into the I-shaped chuck on the forming mandrel, and the steel plate is curled after pressing the edge of the plate. The steel plate is not very straight during the processing process, and the steel plate is relatively long, and it is necessary to control the gap after the steel plate is inserted. The technical requirements are relatively high. When the edge of the steel plate is inserted into the I-shaped chuck on the forming mandrel, the operation It is time-consuming and labor-intensive, and the efficiency is low. For the processing of steel plates with different thicknesses, the forming mandrel needs to be replaced, which is very inconvenient to the processing process, resulting in low processing efficiency, and the gap between the steel plate inserted into the I-shaped chuck will affect the quality of the steel pipe. There will be a straight section at the edge of the seam, resulting in a pointed "peach" shape of the tube after forming, so the steel pipe product cannot meet the technical requirements of diameter size and roundness precision requirements

When the edge of the steel plate is inserted into the I-shaped chuck on the forming mandrel, there must be a certain gap between the steel plate and the chuck, so the phenomenon that the steel plate often comes out

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