Method for producing socket-type spliced ​​metal corrugated steel pipes by using four-axis bending machine

Abstract

The invention relates to a method for producing a socket-type splicing metal corrugated steel pipe through a four-shaft bending machine. The method is characterized in that a flat corrugated steel plate is subjected to bending forming treatment; a), a passive forming shaft is fixed into a tension frame, the steel plate is inserted into the portion above a driving shaft A, a driving shaft B and a forming shaft and below the passive forming shaft; d), through PLC control, the tension frame is controlled to drive the passive forming shaft, the driving shaft A, the driving shaft B and the passive forming shaft to conduct joint extrusion and stretching so that the steel plate can form a R arc; c), a recoil force reduction hydraulic cylinder B ascends to drive the forming shaft to ascend to extrude the steel plate, the outer diameter of the right side of the forming shaft is larger than that of the left side of the forming shaft, and the sizes of the two ends of the extruded steel plate are different; and d), the recoil force reduction hydraulic cylinder B is controlled by a PLC and falls back to the original position, the falling shaft falls back to the base point, the passive forming shaft A returns to the original position, the bent steel plate is taken out, and the finished product is obtained. The method has the beneficial effects that the product quality is improved, the working efficiency is high, the space is saved, the transportation cost is low, and the structural bearing capacity stress is increased.

Description

technical field [0001] The invention relates to the field of metal products industry, a production method for replacing reinforced concrete bridges and culverts of railways and highways, bridges and tunnels, and specifically a method for producing socket-type spliced ​​metal corrugated steel pipes by using a four-axis bending machine . Background technique [0002] The processing technology and disadvantages of the existing metal corrugated integrated culvert pipe are as follows: The first step of the flange processing technology: 1) The blanking of the flange angle steel requires 3 people to complete; 2) The flange rolling and molding requires 3 people to complete; 3) The flange 3 people are required to complete the welding and forming; 4) 4 people are required to complete the flange drilling and forming; 5) Inspection; 6 storage; [0003] The second step of culvert pipe processing technology: 1) 3 people are required to complete the welding of the flat plate; 2) 2 people ...

AI Technical Summary

Problems solved by technology

[0002] The processing technology and disadvantages of the existing metal corrugated integrated culvert pipe are as follows: The first step of the flange processing technology: 1) The blanking of the flange angle steel requires 3 people to complete; 2) The flange rolling and molding requires 3 people to complete; 3) The flange 3 people are required to complete the welding and forming; 4) 4 people are required to complete the flange drilling and forming; 5) Inspection; 6 storage;

[0003] The second step of culvert pipe processing technology: 1) 3 people are required to complete the welding of the flat plate; 2) 2 people are required to complete the rolling wave forming; 3) 3 people are required to complete the preliminary welding of the culvert pipe counterpart and flange; 4) The overall welding requires 4 people Completion: 5) inspection; 6) warehousing; 7) galvanizing processing: due to the large space occupied by the processing and forming of culvert pipes, the transportation and galvanizing costs increase; 8) transportation and delivery: due to the large area occupied by the processing and forming of culvert pipes, resulting in The transportation cost has increased sharply; 9) On-site installation, the overall labor cost is very high

[0004] The existing processing technology of corrugated metal corrugated culvert pipes is that after flat plate numerical control punching, corrugated forming, bending and galvanizing processing, and finally transported and delivered to the site for installation, but the assembled culvert pipes with a diameter of less than 5 meters are in the process of on-site installation due to The diameter is large, and the product can only be divided into multiple pieces for assembly, resulting in an increase in the amount of high-strength bolts and an increase in installation costs

[0005] In short: the existing metal corrugated culvert pipe processing technology is complex and cumbersome, and the cost of galvanizing, transportation, installation, and labor remains high, which affects product promotion and limits product performance

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