CN110773958A

CN110773958A - Production method of assembly welding metal profiled bar

Info

Publication number: CN110773958A
Application number: CN201911020399.9A
Authority: CN
Inventors: 孙方东; 朱艳春; 马立峰; 帅美荣; 秦建平
Original assignee: Shaoxing Dongzhe Technology Co Ltd
Current assignee: Shaoxing Dongzhe Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-02-11

Abstract

A production method of an assembly welding metal profiled bar belongs to the technical field of metal profile production and is characterized by comprising the following implementation steps: 1. designing the shape and the size of a wing plate with multiple sizes according to the known standard size of the metal profile; 2. designing and manufacturing the roller shape and the size of the upper roller according to the structure and the size of the wing plate; 3. rolling multiple-square-width wing plates and web plates by a plate rolling mill; 4. shearing the wing plate according to the requirement of producing the metal profile; 5. shearing the web plate according to the requirement of producing the metal profile; 6. and matching and assembling the wing plates and the web plates and welding the wing plates and the web plates together to manufacture the required metal profile. The invention is suitable for manufacturing various metal profiles, and has the advantages of precise profile geometry, high production efficiency, good bonding property between the wing plate and the web plate, small influence of welding seam quality on product quality, and the like.

Description

Production method of assembly welding metal profiled bar

Technical Field

The invention belongs to the technical field of metal section bar production, and particularly relates to a production method of an assembly welding metal profiled bar.

Background

At present, the following methods are mainly used for manufacturing metal profiles:

1. hot rolling process

The hot rolling method is a method of producing a metal profile by means of multi-pass hot rolling. Its advantages are high integrity, low cost, wide selection range of raw materials and high weatherability. It is mainly suitable for producing hot-rolled section steel and hot-rolled section bar made of non-ferrous metal material. The disadvantages are that: (1) the product is single, the process is complex, and the production flow is long; (2) the quantity of equipment is large, and the product adjustment is not flexible; (3) the hole pattern system is complex, and the product specification is less; (4) the product occupies large space, is inconvenient to store and transport and has high logistics cost.

2. Welding method

The welding method is a method for producing a metal profile by shearing, assembling and welding a steel plate. It features flexible production process, wide specification range of products and capability of producing light structural section. The disadvantages are that: (1) steel plates are needed for production, and the material cost is high; (2) the steel plates are difficult to splice, and the relative positions of the web plate and the wing plate are difficult to control; (3) the steel plate needs to be cut and machined, so that the metal consumption is large; (4) the welding seam is wide and thick, and a large amount of welding materials and electric energy are consumed; (5) is only suitable for producing the section with simple section and large specification; (6) the product occupies large space, is inconvenient to store and transport and has high logistics cost.

3. Bending method

The bending method is a method for producing a profile by shearing, bending and cutting a steel plate. The bending method can be divided into press bending forming and roll bending forming, and can also be divided into cold bending forming and hot bending forming. It features flexible production process, wide specification range of products and capability of producing light structural section. The disadvantages are that: (1) steel plates are needed for production, and the material cost is high; (2) the thick plate is difficult to bend, and large-specification sectional materials are difficult to produce; (3) the number of equipment is large, the operating line is long, and the occupied area is large; (4) the forming tool has complex structure, difficult manufacture and high cost; (5) the product occupies large space, is inconvenient to store and transport and has high logistics cost.

4. Extrusion method

The extrusion method is a method of extruding a metal billet into a profile by an extruder. Because the plastic deformation resistance of metal is large in the extrusion process, the extruded section bar of metal materials with low deformation resistance, such as aluminum alloy, is mainly produced at present. The disadvantages are that: (1) the section size is small, and large-specification section bars are not easy to produce; (2) the metal yield is low; (3) the forming tool has complex structure, difficult manufacture and high cost; (4) the product occupies large space, is inconvenient to store and transport and has high logistics cost.

Disclosure of Invention

The invention aims to provide a method for assembling and welding metal profiles by utilizing a flange with multiple scales and widths, which can effectively overcome the defects in the prior art.

The invention is realized in such a way, and is characterized by comprising the following implementation steps:

1. designing the shape and the size of a wing plate with multiple sizes according to the standard size of various metal profiles: as shown in fig. 1, L is the center distance between two adjacent grooves, which is determined according to the standard size of various metal profiles, 2' … 2 ⁿ' respectively a 1 st groove, a 2 nd groove and an … th groove, wherein n = 2-10, the groove depth a = 2-10 mm, and the groove width b is larger than 1-3 mm of the web thickness;

2. designing and manufacturing the roller shape and the size of the upper roller according to the structure and the size of the wing plates with multiple sizes and widths, as shown in figure 2;

3. rolling wing plate materials and web plate materials with multiple lengths and widths by using a plate rolling mill;

4. shearing the wing plate material with the multiple-length width on a shearing machine according to the requirement of producing the metal profiled bar to obtain the required wing plate material;

5. according to the requirements of producing metal profiled bars, shearing the web materials meeting the requirements on a shearing machine;

6. and matching and assembling the wing plates and the web plates and welding the wing plates and the web plates together to manufacture the required metal profile.

The invention has the advantages and positive effects that:

(1) the method is suitable for manufacturing various metal special-shaped section steel;

(2) the metal section is produced by rolling the plate blank by adopting the hot-rolled plate strip rolling mill, so that the production efficiency is high;

(3) compared with the rolled section, the metal produced by assembling and welding the metal section has simple deformation, less rolling passes, accurate geometric dimension of the section, and less metal loss and energy consumption;

(4) compared with a rolled section, the finishing processes of straightening, shearing and the like in the production of the assembled and welded metal section are simple, the section is convenient to cut to length and accurate in size, and the product has good linearity;

(5) compared with the common welding section, the assembly welding metal section is accurate and convenient in positioning;

(6) compared with the common welded section, the combination between the wing plate and the web plate of the assembled and welded metal section is good, and the influence of the quality of a welding seam on the quality of a product is small;

(7) the product has the further advantages that: the assembly welding metal section can be transported and stored in a flat material mode, is assembled and welded on site, and is low in logistics cost.

Drawings

FIG. 1 is a schematic view of a multi-scale wide-wing plate

FIG. 2 is a schematic view of the installation of upper and lower rolls

FIG. 3 is an end view of a metal H-shaped section

FIG. 4 is an end view of a metal T-section

FIG. 5 is an end view of a metal box section

FIG. 6 is an end view of a metal "channel" steel section

FIG. 7 is an end view of a metal "angle" steel section

1-multiple times of wide wing plate material; 2. 2' … 2 ⁿ' -1 st, 2 nd 2 … nth groove; 3-a plate blank; 4-upper roller; 5, rolling down; a-the trench width; b-the depth of the trench; l-the center distance between two adjacent grooves.

Detailed Description

The method for producing the H-shaped steel comprises the following steps:

as shown in fig. 3: the material is low carbon steel, the length is 6000mm, the height is 400mm, the width is 300mm, the wing plate thickness is 10mm, the web plate thickness is 10mm, and the rolling equipment is a hot-rolled plate strip continuous rolling unit with the thickness of 800 mm.

The implementation steps are as follows:

1. according to the specification and the size of the known H-shaped steel, the shape and the size of the wing plate with the multiple-length width are designed: as shown in fig. 1, the center-to-center distance L of the grooves 2, 2' is 300mm, the groove width and the groove depth are 12mm and 8mm, respectively, and the number of the grooves is 2;

2. according to the specification and the size of the known H-shaped steel, the size of a web plate is designed to be 24000mm in length, 760mm in width and 10mm in thickness;

3. designing and manufacturing the structure and the size of the upper roller according to the shape and the size of the multiple-ruler-width wing plate in the step 1, and shown in figure 2.

4. According to the shape and the size of the multiple-length wide wing plate in the step 1, selecting a plate blank with the size of 2500mm in length, 560mm in width and 120mm in thickness, rolling the plate blank into the needed multiple-length wide wing plate by using a plate rolling mill, and performing 6 times of extension rolling and two times of forming rolling in total;

5. according to the size of the web plate in the step 2, selecting a plate blank with the length of 2500mm, the width of 720mm and the thickness of 120mm, rolling the plate blank into the required web plate by using a plate rolling mill, and carrying out 8-pass extension rolling in total;

4. shearing the wing plates with the multiple sizes and the widths obtained in the step 4 on a shearing machine according to production requirements to manufacture wing plates required by production;

5. according to the product requirements, shearing the web obtained in the step 5 on a shearing machine to manufacture the web meeting the production requirements;

6. and the wing plates and the web plates are assembled in a matching way and then welded together to manufacture the required H-shaped metal profile.

Claims

1. The production method of the assembled and welded metal profiled bar is characterized by comprising the following implementation steps:

(1) designing the shape and the size of a wing plate with multiple sizes according to the standard size of various metal profiles: the center distance (L) between two adjacent grooves is determined according to the standard size of various metal profiles, and the groove width (a) and the groove depth (b) of the 1 st, the 2 nd and the … th grooves are determined;

(2) designing the roller shape and size of the upper roller according to the structure and size of the multiple-length wide wing plate;

(3) rolling wing plate materials and web plate materials with multiple lengths and widths by using a plate rolling mill;

(4) shearing the wing plate material with the multiple-length width on a shearing machine according to the requirement of producing the metal profiled bar to obtain the required wing plate material;

(5) according to the requirements of producing metal profiled bars, shearing the web materials meeting the requirements on a shearing machine;

(6) and matching and assembling the wing plates and the web plates and welding the wing plates and the web plates together to manufacture the required metal profile.

2. A method for manufacturing an assembled and welded metal profile according to claim 1, wherein the 1 st, 2 nd and … th grooves n =2 to 10, the groove depth a =2 to 10mm, and the groove width b is 1 to 3mm greater than the web thickness.