CN103551705A

CN103551705A - Chongqing monorail roof assembly welding process method

Info

Publication number: CN103551705A
Application number: CN201310501767.8A
Authority: CN
Inventors: 张力; 王雷
Original assignee: Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2013-10-23
Filing date: 2013-10-23
Publication date: 2014-02-05

Abstract

Disclosed is a Chongqing monorail roof assembly welding process method. Firstly, various profiles of a roof fall on a tool and are assembled according to drawing requirements, two process beams are added at a first end and a second end of a workpiece respectively after assembly is finished to ensure roof appearance completion, staggered joints are required to be controlled within 1mm; secondly, welding seams are tack-welded every 200mm, the tack-welding length is 20-30mm, the cross cutting depth is 1-2mm, strip weights with the same type are placed in a welding seam area after tack-welding is finished; finally, automatic welding is performed by the aid of a double-gun and double-wire IGM manipulator, and the welding seams are searched by the aid of laser tracking. The production efficiency of products is improved, double guns are high in efficiency, double wires are high in speed, the production efficiency is greatly improved, the production efficiency of a double-gun and double-wire process is two times and even more than that of a single-gun and single-wire welding process, the forming quality of roof welding seams is improved, welding deformation is decreased by symmetric welding of the double guns, the quality of the products is ensured, repair quantity is decreased, and the labor intensity of workers is reduced.

Description

Monorail in Chongqing roof panels forms welding technique

Technical field

The present invention relates to welding procedure field, especially monorail in Chongqing roof panels forms welding procedure.

Background technology

Monorail in Chongqing roof constructed of aluminium belongs to slab and girder.This structure exists sheet material thinner, welds yielding shortcoming, causes the desired weld seam of original welding procedure to realize the poor effect of single face welding and double face type.

The production of existing completed two bicycle top projects is mainly to adopt manual welding, automatic welding list rifle monofilament Welding.In process of production, the distortion producing in order to control welding, solid with regard to main points every 100mm, and it is discontinuous, of poor quality to want operation beam, such way usually to make weld seam carry on the back moulding, postwelding repairing amount increases.

Summary of the invention

The object of this invention is to provide a kind of monorail in Chongqing roof panels and form new welding procedure, this technique can solve the problems such as manual welding, single rifle monofilament Welding welding deformation be serious, finally improves weldquality in kind, promotes welding production efficiency.

For achieving the above object, the invention provides a kind of monorail in Chongqing roof panels and form welding technique, it is characterized in that comprising the following steps:

First each piece section bar of roof panels is dropped in frock, according to drawing requirement, be grouping, group is to after completing, and respectively adds a technique beam complete to guarantee roof profile at end of workpiece and "A" end of car place, and mismatch requires to be controlled in 1mm simultaneously;

Secondly every 200mm butt welded seam, put admittedly, the solid length of point is 20-30mm, and the profile groove degree of depth is 1-2mm, after point completes admittedly, places the bar shaped foundary weight of same model at welded seam area;

Finally use rush-harvesting and rush-planting mariages IGM manipulator to carry out automatic welding, weld seam searching mode is that laser is followed the tracks of.

The advantage that the present invention has with respect to prior art and progress:

1) production efficiency of improving product, rush-harvesting and rush-planting high efficiency mariages has improved production efficiency at a high speed greatly, and the production efficiency of rush-harvesting and rush-planting mariages technique is that 2 times of single rifle monofilament Welding are even higher;

2) improve the quality of roof appearance of weld, rush-harvesting and rush-planting is symmetrically welded and has reduced welding deformation, has guaranteed the quality of product;

3) reduce repairing amount, reduce workman's labour intensity.

The specific embodiment

1) materials and parts polishing.Use staight shank abrasive machine butt welded seam region to polish, polishing region is 15-25mm, and polishing requirement is to till exposing metallic luster.

2) anti-dress group is solid to, point.During roof panels is formed, each top board falls into frock successively to both sides according to roof transverse center, is grouping.During each top board location, note controlling seal groove surrounding profile and section bar mismatch, make misalignment be no more than 1mm, diagonal is poor be controlled at 2mm within.Group, to after completing, is used frock to hold out against, compress materials and parts, and at two-end-point Gu Gongyiliang.At the top board back side, stick " chase is dark, groove is wide " ceramic gasket, guarantee chase and weld seam center superposition and paste tight.Complete after this, use MIG manual welding to put solid, the solid length of point is 20-30mm, and point is spaced apart 200-300mm admittedly, and the profile groove degree of depth is 1-2mm, requires linearity and weld seam center superposition.After point completes admittedly, at welded seam area, place bar shaped foundary weight, require evenly to put.

3) automatic welding.After group to point is solid, Robot actions work is adjusted rush-harvesting and rush-planting mariages IGM automatic welding equipment and is prepared welding.During welding, use the parameter of manufacturing work test specimen before project kickoff, the welding parameter of the weld seam of top board and middle top board is that front silk power 57-60%, rear silk power are 53-55%, front be modified to-11--15% of silk arc length, rear be modified to-5--9% of silk arc length, speed of welding is 150-160cm/min.The welding parameter of the weld seam of side top board and top board is that front silk power is 50-54%, and rear silk power is 48-52%, front be modified to-15--20% of silk arc length, and rear be modified to-13--17% of silk arc length, speed of welding is 150-160cm/min.

4) weld cleaning, repairing.After welding, operator repairs places such as the starting the arc, receipts arc, welding point, defects.

5) weld seam is carried on the back molding inspection, repairing.Treat counter fill workpiece and all weld, repair after, workpiece is hung out to the roof position of foetus and by being just housed on stirrup, takes off ceramic gasket, and then butt welded seam carries out 100VT%+100%PT check, to existing the weld seam of defect to repair and do PT check, provide flaw detection report after qualified.

Claims

1. monorail in Chongqing roof panels forms a welding technique, it is characterized in that comprising the following steps:

2. monorail in Chongqing roof panels according to claim 1 forms welding technique, it is characterized in that: the front silk of the welding parameter power 57-60% of the weld seam of top board and middle top board, rear silk power are 53-55%, front be modified to-11--15% of silk arc length, rear be modified to-5--9% of silk arc length, speed of welding is 150-160cm/min; The welding parameter of the weld seam of side top board and top board is that front silk power is 50-54%, and rear silk power is 48-52%, front be modified to-15--20% of silk arc length, and rear be modified to-13--17% of silk arc length, speed of welding is 150-160cm/min.