CN113787302A

CN113787302A - Regular welding seam manufacturing method

Info

Publication number: CN113787302A
Application number: CN202110959813.3A
Authority: CN
Inventors: 周荣鹏; 何永; 鲁军
Original assignee: CSSC Nanjing Luzhou Machine Co Ltd
Current assignee: CSSC Nanjing Luzhou Machine Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-12-14

Abstract

A regular welding seam manufacturing method is characterized in that a mode of a machine tool back gouging groove is adopted, inner side welding seams of 3 girth welding seams of a foundation column are welded firstly, after the inner side welding seams are welded, the foundation column is placed on a vertical lathe, the root of the 3 girth welding seams is lathed by the vertical lathe, the welding seams at the root are removed, the back gouging position is in a regular shape, the thickness of the lathed part is 5mm, and then the welding is carried out on the outer side welding seams. The back gouging part treated by the method is in a metal color, is convenient to check, and can effectively and completely remove the root defects of the welding line; the back gouging part is in a regular shape and can be welded by automatic welding; the method is time-saving and labor-saving, reduces the labor intensity of workers, and effectively ensures the qualification rate of products; the working efficiency can be improved, and the production time of the product is greatly shortened on the premise of ensuring the product quality.

Description

Regular welding seam manufacturing method

Technical Field

The invention belongs to the technical field of production and manufacturing, and particularly relates to a regular welding line manufacturing method.

Background

For some welding seams needing 100% of over-detection, the front side of a part to be welded is welded usually, then the back side of the part to be welded is subjected to carbon arc air gouging back gouging and grinding by a grinder, and then welding is carried out. The traditional manufacturing method has the disadvantages of low efficiency, high requirement on the skills of operators, high working strength and no guarantee on the product quality.

For some welding seams needing 100% of over-detection, the front side of a part to be welded is welded usually, then the back side of the part to be welded is subjected to carbon arc air gouging back gouging and grinding by a grinder, and then welding is carried out. The method has the advantages that the welding seam with the defective root can be planed by the carbon arc gouging, and the welding seam is ensured to be free of defects.

However, this procedure also has disadvantages. Firstly, the carbon arc gouging is purely manually operated, the requirement on the skill of an operator is high, if an operation error occurs, the defect at the root of a welding seam is possibly not completely removed, and finally the flaw detection of the welding seam cannot pass; secondly, the groove of the welding seam produced by the carbon arc air gouging is zigzag and irregular, and after the carbon arc air gouging, the surface of the welding seam is provided with a layer of carbon, the welding seam after the carbon arc air gouging needs to be polished by a grinder, so that the workload of workers is increased; thirdly, since the groove after the carbon arc gouging has an irregular shape, the groove after the carbon arc gouging is generally welded by manual welding.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a method for manufacturing a regular welding seam, which improves the production efficiency and the qualification rate of the welding seam and reduces the labor intensity by back chipping in a machine tool machining mode.

The invention provides a regular weld joint manufacturing method, which adopts a mode of a machine tool to back off a groove, firstly welding inner side weld joints of 3 girth weld joints of a foundation column, placing the foundation column on a vertical lathe after the inner side weld joints are welded, turning the root parts of the 3 girth weld joints by the vertical lathe, removing the weld joints at the root parts, wherein the back off parts are in a regular shape, the thickness of the turned off parts is 5mm, and then welding the outer side weld joints.

As a further technical scheme of the invention, the back gourmet part is in a metallic color.

Furthermore, the 3 girth welds are a first girth weld between the flange and the surrounding plate, a second girth weld between the surrounding plate and the conical plate, and a third girth weld between the conical plate and the lower surrounding plate.

Furthermore, the first circumferential weld is firstly welded with an inner side weld, and an outer side weld is machined through a vertical lathe;

the inner side welding seam of the second annular welding seam is formed by splicing an annular plate/a coaming plate and a conical plate in a welding mode, the outer side welding seam is formed by splicing the coaming plate and the conical plate in a vertical lathe machining mode;

the inner side welding seam of the third circumferential welding seam is formed by splicing the step plate/the conical plate and the lower coaming in a welding mode, and the outer side welding seam is formed by splicing the conical plate and the lower coaming in a vertical lathe machining mode.

Furthermore, automatic welding is adopted for welding at the root.

The advantage of the present invention is that,

1. the back gouging part is in a metal color, so that the inspection is convenient, and the root defects of the welding line can be effectively and completely removed;

2. the back gouging part is in a regular shape and can be welded by automatic welding;

3. the time and the labor are saved, the labor intensity of workers is reduced, and the qualification rate of products is effectively ensured;

4. the working efficiency is improved, and the production time of the product is greatly shortened on the premise of ensuring the product quality.

Drawings

FIG. 1 is a schematic view of a pillar structure according to the present invention;

FIG. 2 is a schematic cross-sectional view of a first girth weld of the present invention;

FIG. 3 is a cross-sectional view of a second girth weld of the present invention;

FIG. 4 is a schematic cross-sectional view of a third girth weld of the present invention.

Detailed Description

Referring to fig. 1-4, in the present embodiment, a method for manufacturing a regular weld is provided, in which a back gouging groove of a machine tool is adopted, an inner side weld of 3 girth welds of a foundation column is welded, after the inner side weld is welded, the foundation column is placed on a vertical lathe, a root of the 3 girth welds is lathed by the vertical lathe, the weld at the root is removed, a back gouging portion is in a regular shape, the thickness of the lathed portion is 5mm, and then the outer side weld is welded.

The diameter of the upper opening of the foundation column is 3 meters, the diameter of the lower opening is 2.3 meters, the height of the upper opening is 2.3 meters, the whole foundation column is conical, 3 girth welds are arranged on the foundation column, each weld needs 100 percent over-detection, and the back gouging position is in metal color.

The 3 girth welds are a first girth weld 6 between the flange 1 and the surrounding plate 2, a second girth weld 7 between the surrounding plate 2 and the conical plate 3, and a third girth weld 8 between the conical plate 3 and the lower surrounding plate 5.

The first circumferential weld 6 is firstly welded with an inner side weld 6-1, and an outer side weld 6-2 is machined through a vertical lathe;

the inner side weld seam 7-1 of the second ring weld seam 7 is formed by splicing a ring plate 9/a coaming 2 and a conical plate 3 in a welding mode, and the outer side weld seam 7-2 is formed by splicing the coaming 2 and the conical plate 3 in a vertical lathe machining mode.

An inner side welding line 8-1 of the third circumferential welding line 8 is formed by splicing the step plate 4/the conical plate 3 and the lower coaming 5 in a welding mode, and an outer side welding line 8-2 is formed by splicing the conical plate 3 and the lower coaming 5 in a vertical turning mode.

And automatic welding is adopted for welding at the root.

Compared with a carbon arc gouging back gouging groove, the back gouging groove is in a metal color and bright by using a machine tool, and the defects of the root of the welding line can be seen at a glance, so that the root defects of the welding line can be effectively and completely removed; and the carbon arc air gouging back gouging groove is used, the back gouging part is black, and the defect is not easy to be found.

A back gouging groove is machined, a back gouging part is in a regular shape, and automatic welding can be used for replacing manual welding; and the back gouging groove is processed by a carbon arc gouging machine, the groove is in an irregular sawtooth shape, and the groove is in an irregular shape, so that automatic welding cannot be used.

After the carbon arc gouging is used for back chipping, a layer of carbon exists on the surface of the groove, the groove is polished by a grinding machine, time and labor are consumed, the labor intensity of workers is increased, and the qualified rate cannot be guaranteed.

The working efficiency is greatly improved, and the traditional method of back chipping by using a manual carbon arc air gouging and polishing after back chipping wastes time and labor; by adopting a machine tool and back chipping, the efficiency can be greatly improved, and the product quality can be ensured. In the traditional method, manual carbon arc gouging is used for back chipping, and grinding is carried out after back chipping, so that a foundation column can be manufactured in 2 days generally; but the back gouging is changed into a machine tool machine, so that one base column can be manufactured within 2 hours generally, and the product quality can be ensured.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is intended to be protected by the appended claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A regular welding seam manufacturing method is characterized in that a mode of a machine tool back chipping groove is adopted, an inner side welding seam of 3 circular welding seams of a foundation column is welded firstly, after the inner side welding seam is welded, the foundation column is placed on a vertical lathe, the vertical lathe is used for lathing the root of the 3 circular welding seams, the welding seam of the root is removed, the back chipping part is in a regular shape, the thickness of the lathed part is 5mm, and then welding is carried out on the outer side welding seam.

2. The method of making a regular weld according to claim 1, wherein the back gouging portion is metallic in color.

3. The method for making a regular weld according to claim 1, wherein the 3 girth welds are a first girth weld between the flange and the surrounding plate, a second girth weld between the surrounding plate and the conical plate, and a third girth weld between the conical plate and the lower surrounding plate.

4. The method of making a regular weld according to claim 3,

firstly welding an inner side welding seam by the first circumferential welding seam, and machining an outer side welding seam by a vertical lathe;

the inner side welding seam of the second ring welding seam is formed by splicing a ring plate/a coaming and a conical plate in a welding mode, the outer side welding seam is formed by splicing the coaming and the conical plate in a vertical lathe machining mode; the inner side welding seam of the third circumferential welding seam is formed by splicing the step plate/the conical plate and the lower enclosing plate in a welding mode, the outer side welding seam is formed by splicing the conical plate and the lower enclosing plate in a vertical lathe machining mode.

5. The method of making a regular weld according to claim 1, wherein the welding at the root is automated.