Machining method for perforated U-shaped rib

A processing method, U-shaped technology, applied in the field of sheet metal forming, can solve the problems of low processing efficiency, unsuitable for large-scale large-scale production, etc., and achieve the effects of improving hole-out efficiency, reducing processing difficulty, and eliminating internal stress

Inactive Publication Date: 2013-12-11
CHINA RAILWAY SHANQIAO GRP CO LTD
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  • Abstract
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Problems solved by technology

[0002] The traditional processing concept, in order to ensure the accuracy of the U-shaped rib hole group, is to drill holes on the basis of the U-shaped rib forming. Although this c

Method used

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  • Machining method for perforated U-shaped rib
  • Machining method for perforated U-shaped rib
  • Machining method for perforated U-shaped rib

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[0031] The process flow of the processing method of the perforated U-shaped rib of the present invention is as follows:

[0032] Steel plate pretreatment-marking-flame cutting-stacking-milling length side-drilling-milling width side-milling groove-profiling-inspection.

[0033] The key points of the process of the present invention before the U-shaped rib is pressed:

[0034] 1) Repeated 6 to 8 times of flattening the steel plate material to eliminate the internal stress of the steel plate, which can greatly reduce the deformation caused by the subsequent processing.

[0035] 2) After pretreatment, the steel plate is cut with a flame cutting machine. The width of each plate is the length of the U-shaped rib plus the allowance and width for milling on both sides plus the allowance for milling on both sides, machining and milling The margin is 8mm (the margin on each side is 4mm), the flame-cut plate is hoisted to the stack, the 8 pieces are aligned and fixed by electric welding, and th...

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Abstract

The invention relates to a machining method for a perforated U-shaped rib in manufacturing of a steel structure, in particular to a method for profiling a U-shaped rib after drilling before steel plate profiling, belonging to the technical field of plate forming. The machining method is implemented by the following steps: A, pretreating, flattening and feeding a steel plate; B, milling an edge in the length direction after stacking electric welding fixation; C, drilling a plurality of plates simultaneously and then milling an edge in the width direction; D, milling a plate groove; E, profiling the U-shaped rib. The machining method has the technological progress effects that (1) the machining difficulty for drilling after U-shaped rib forming can be reduced by drilling a hole group before profiling, (2) the hole group is simultaneously machined in a plurality of layers of plates through a drilling template to improve the hole forming efficiency, and (3) the internal stress of the steel plate is eliminated, the deformation before plate profiling is reduced and the positional accuracy of the hole group is guaranteed.

Description

Technical field [0001] The invention relates to a processing method for U-shaped ribs with holes in the manufacture of steel structures, in particular to a method for drilling U-shaped ribs before pressing steel plates, and belongs to the technical field of plate forming. Background technique [0002] The traditional processing concept, in order to ensure the accuracy of the U-shaped rib hole group, is to drill holes on the basis of the U-shaped rib forming. Although this can provide a good guarantee for the quality of the bar, it is very low in processing efficiency. Low, considering that this processing technology is not suitable for large-scale large-scale production. Contents of the invention [0003] The purpose of the present invention is to provide a method of drilling the steel plate before pressing the plate, and then pressing the U-shaped rib, so as to improve the work efficiency of the batch operation. [0004] The technical scheme of the processing method of t...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 臧俊贵刘斌王玉竹王玉策
Owner CHINA RAILWAY SHANQIAO GRP CO LTD
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