CN101569902A

CN101569902A - Method for cold-bending dovetail groove in fireproofing accurate steel materials and device thereof

Info

Publication number: CN101569902A
Application number: CNA2009101076219A
Authority: CN
Inventors: 艾正青; 庄大建; 刘继英; 郑洪贤; 林汉德
Original assignee: GUANGDONG JINGANG GLASS SCIENCE & TECHNOLOGY Co Ltd; North China University of Technology
Current assignee: GUANGDONG JINGANG GLASS SCIENCE & TECHNOLOGY Co Ltd; North China University of Technology
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2009-11-04
Anticipated expiration: 2029-05-27
Also published as: CN101569902B

Abstract

The invention discloses a method for cold-bending dovetail groove in fireproofing accurate steel materials or other metal materials, the materials comprise right angle grooves of which the steel strip longitudinal roller is bent to be in cap shape, and the top part and the lateral part of the groove is bent backwards to arc shape until the bend angle achieves the requirements of the dovetail angle according to the product requirement, the arc part of the top part and the lateral part of the groove is pressed and planished ; the invention also discloses the equipment suitable for the method, as the bent section of the steel plate is located at the radial face of the roller, therefore, the bent point can be exerted with sufficient forming pressure with ease, the arc of the bent point is small, the equipment is simplified, and the production is stable and the forming speed is fast.

Description

The method of cold-bending dovetail groove in fireproofing accurate steel materials and equipment thereof

Technical field

The invention belongs to section bar roll bending formation technical field, particularly the roll bending formation method and apparatus of the accurate clod wash dovetail groove of fire prevention steel profile.

Background technology

Roll bending formation is meant at room temperature, with many to having the roll of contoured, make metallic plate constantly carry out transverse curvature, up to being processed into the needed section bar of user, and do not change a kind of sheetmetal deep process of its thickness with contoured in straight-line while longitudinally.

Figure 2 shows that the kind bottom of adopting the roll bending formation technology to produce has the sectional view of the fireproofing accurate cold-pressing quality steel section bar of dovetail groove, comprised a dovetail angle in the section bar less than 90 ° dovetail groove.Dovetail groove in the section bar both can be used as the draw-in groove of multiple spot door lock, also can insert fire prevention expansion bar, play the fireproof special role, when fire takes place, can intercept ganging up of fire hazard aerosol fog, thereby the shape and size of dovetail groove are had relatively high expectations.The traditional approach of dovetail groove moulding is to use the help roll roll forming of inclination certain angle configuration, very difficulty is installed, adjusted to help roll, the production process instability, moulding for dovetail groove in the thick steel sheet, because moulding needs pressure big, the help roll structure of traditional approach is difficult to the briquetting pressure that provides enough.

Summary of the invention

The object of the present invention is to provide that a kind of equipment is simple, moulding is reliable, produce and stablize, be suitable for dovetail groove cold bending shaping method and equipment in fireproofing accurate steel profile or other shape.

Clod wash dovetail groove method comprises the steps: in the fireproofing accurate steel profile of the present invention

A. the vertical roll bending of steel band is become the trough with straight angle of hat;

B. from the top and the sidepiece recurvation camber of groove reaches product requirement until bent angle dovetail angle;

C. the top of groove and the arch section shaping of sidepiece are flattened.

Among the present invention, steps A branch two procedures at least makes the bent angle gradual change become the right angle, step B also at least the branch two procedures make the bent angle gradual change become the dovetail angle of product requirement, step C also can divide two procedures that the arch section gradual change is flattened by step C at least.

In step C, preferably to the steel band both sides being applied lateral thrust to the center.

Roll bending equipment of the present invention comprises the trough with straight angle roll that the steel band roll bending is become hat, also comprise: at least one pair of is with the acutangulate dovetail groove roll of trough with straight angle recurvation, its top roll and lower roll respectively have the cutter rib of acute angle, a side of cutter rib is positioned at the sagittal plane of roll, another side is the inclined-plane, the lower roll of top roll cutter rib correspondence position has corresponding acute angle conduit, and the top roll of lower roll cutter rib correspondence position has corresponding acute angle conduit; At least one pair of shaping roller, its top roll is fluted, and lower roll has boss, and the block piece of the lateral thrust of providing is provided in the outside, and this block piece is catch roller or edge-on roller preferably.

The present invention is because the bending part of steel plate is in the sagittal plane of roll, can apply enough briquetting pressures to bending point easily, the bending point radian is little, equipment is also oversimplified, and produce stable, shaping speed is fast, can be used for various have the fireproofing accurate cold-pressing quality steel section bar of dovetail groove shape or the processing of other section bar, is particularly suitable for the production and the processing of the above heavy wall dovetail groove of 1mm.

Description of drawings

Fig. 1 is the sectional view that has the fireproofing accurate cold-pressing quality steel section bar of dovetail groove.

Fig. 2 is the dovetail groove sectional view of finishing after dovetail groove is processed.

Fig. 3 is the variable condition sectional view of the roll bending formation process steel plate of dovetail groove.

Fig. 4 is a trough with straight angle roll schematic diagram.

Fig. 5 is a dovetail groove roll schematic diagram.

Fig. 6 is a shaping roller schematic diagram.

The specific embodiment

Comprised a dovetail groove that is positioned at the bottom in the section bar shown in Figure 1, this dovetail groove generally need be finished at first in section bar cold roll forming process, and then carry out bending of other position because to bend difficulty big.

Fig. 2 illustrates the section bar of finishing after dovetail groove is processed, section material section is divided into 12 entities, wherein

entity

3,4,7,8 is the bending point circular arc,

entity

1,2,5,6,9,10,11,12 is the plane, the top of groove is made of

entity

1,2,

entity

5,6 is a cell wall, and

entity

9,11 and

entity

10,12 are two sidepieces of groove, are positioned at same plane.This section bar thickness 1.5mm, the top of groove and the distance of sidepiece are depth of dovetail 4.5mm, 70 ° of dovetail angles that comprise 2 symmetries in the section bar, promptly

entity

1 and 5 angle,

entity

5 and 9 angle,

entity

2 and 6 angle or the angle of

entity

6 and 10 are 70 °.

The change of shape of the banded steel plate of the dovetail groove clod wash process shown in Fig. 3, the clod wash process may further comprise the steps:

1. determine required width of steel band according to shape, the size of section bar, section bar as shown in Figure 1, width of steel band is length and each arc section neutral line length sum of each straightway in the cross section, and steel band is nipped flattens (3-1 illustrates among Fig. 3) in the roll of roll-bending shaping machine;

2. the steel band after the leveling is in Fig. 4 on the roll with concavo-convex mould shown in the 4-1, the moulding bending is carried out in 3,4,7, the 8 pairing positions of entity in the steel band, the angle that makes entity 5 and entity 9 is 140 °, the angle that entity 6 and entity are 10 is 140 °, and the steel band cross section after the processing is shown in 3-2 among Fig. 3;

3. in Fig. 4, continue on second roll shown in the 4-2 to carry out the moulding bending in

entity

3,4,7,8 pairing positions with concavo-convex mould, the angle that makes entity 5 and entity 9 is 110 °, the angle that entity 6 and entity are 10 is 110 °, and the steel band cross section after the processing is shown in 3-3 among Fig. 3;

4. in Fig. 4, continue on the 3rd roll shown in the 4-3 to carry out the moulding bending in

entity

3,4,7,8 pairing positions with concavo-convex mould, the angle that makes entity 5 and entity 9 is 90 °, the angle that entity 6 and entity are 10 is 90 °, and the steel band cross section after the processing is shown in 3-4 among Fig. 3;

5. in Fig. 5, continue on the first dovetail groove roll shown in the 5-1 to carry out moulding bending (3-5 illustrates among Fig. 3) in

entity

3,4,7,8 pairing positions, with entity 1 and entity 2,

entity

9,11 and

entity

10,12 back-flexings, the angle that makes entity 5 and entity 9 is 80 °, the angle that entity 6 and entity are 10 is 80 °, and the steel band cross section after the processing is shown in 3-5 among Fig. 3;

6. in Fig. 5, continue on the second dovetail groove roll shown in the 5-2 to carry out moulding bending (3-5 illustrates among Fig. 3) in

entity

3,4,7,8 pairing positions, continuation is with entity 1 and entity 2,

entity

9,11 and

entity

10,12 back-flexings, the angle that makes entity 5 and entity 9 is 70 °, entity 6 is 70 ° with the angle of entity 10, and the steel band cross section after the processing is shown in 3-6 among Fig. 3; Owing to be on the sagittal plane of roll at the BENDING PROCESS entity 5 and the entity 6 of dovetail groove, roll to the steel plate bending moulding, has been simplified mould with radially briquetting pressure;

7. the steel band both sides are applied lateral thrust to the center, with the pressing of the first shaping roller shown in the 6-1 among Fig. 6 with

entity

1,2,11,12 parts of recurvation, the steel band cross section after the processing is shown in 3-7 among Fig. 3;

8. continue band steel both sides are applied lateral thrust to the center, flatten fully, form needed dove-tail (3-8 illustrates among Fig. 3) with the

entity

1,2,11,12 of the second shaping roller shown in the 6-2 among Fig. 6 with recurvation.

Fig. 4 illustrates the roll surface of trough with straight angle roll, the groove 41 that coupling is arranged on roll surface, punch 42, can adopt the gradual change angle of bend of the above operation in 2 roads until becoming the right angle at crooked trough with straight angle, adopt 3 rolls to carry out the bending of 3 procedures as Fig. 4, the roll of 4-1,4-2,4-3 makes steel plate carry out the gradual change bending of-40 ° ,-70 ° and-90 ° respectively among Fig. 4, and the angle at steel plate bending position becomes 140 °, 110 ° and 90 °.

Fig. 5 illustrates the roll surface of dovetail groove roll, its top roll and lower roll respectively have the

cutter rib

51,52 of acute angle, the lower roll of top roll cutter rib 51 correspondence positions has the acute angle conduit, the top roll of lower roll cutter rib 52 correspondence positions has the acute angle conduit, the individual sagittal plane that is positioned at roll in a side of

cutter rib

51,52, the another side is the inclined-plane, because the roll surface of Fig. 5 forms 2 dovetail angles of symmetry simultaneously, between 2 acute angle conduits of top roll by the cambered surface transition of protruding, between 2 cutter ribs of lower roll by recessed cambered surface transition.The roll of 5-1,5-2 makes steel plate carry out the gradual change bending of-110 ° and-120 ° respectively among Fig. 5, and the angle at steel plate bending position becomes 80 ° and 70 °, becomes the dovetail angle of product needed.

Fig. 6 illustrates the roll surface of shaping roller, and its top roll is fluted 61, and lower roll has boss 62, and there is catch roller 63 in the outside, provides lateral thrust to the center by catch roller 63, prevents that the dovetail angle of moulding from changing.At the gradual change arc shape of the above operation in 2 roads or 2 roads that can adopt in the shaping shown in 6-1,6-2 among Fig. 6, until becoming the plane.

Claims

1. the method for a cold-bending dovetail groove in fireproofing accurate steel materials is characterized in that, comprises the steps:

A. the hat trough with straight angle that the vertical roll bending of steel band is become;

B. from the top and the sidepiece recurvation camber of this groove reaches product requirement until bent angle dovetail angle;

C. the top of this groove and the arch section shaping of sidepiece are flattened.

2. according to clod wash dovetail groove method in the described fireproofing accurate steel profile of claim 1, it is characterized in that steps A branch two procedures at least makes the bent angle gradual change become the right angle.

3. according to clod wash dovetail groove method in the described fireproofing accurate steel profile of claim 1, it is characterized in that step B branch two procedures at least makes the bent angle gradual change become the dovetail angle of product requirement.

4. according to clod wash dovetail groove method in the described fireproofing accurate steel profile of claim 1, it is characterized in that step C divides two procedures that the arch section gradual change is flattened at least.

5. according to the method for clod wash dovetail groove in claim 1 or the 4 described fireproofing accurate steel profile, it is characterized in that, among the step C, the steel band both sides are applied lateral thrust to the center.

6. the roll bending equipment of cold-bending dovetail groove in fireproofing accurate steel materials comprises the meet at right angles trough with straight angle roll of groove of steel band roll bending, it is characterized in that, also comprises:

At least one pair of is with the acutangulate dovetail groove roll of trough with straight angle recurvation, its top roll and lower roll respectively have the cutter rib of acute angle, a side of cutter rib is positioned at the sagittal plane of roll, another side is the inclined-plane, the lower roll of top roll cutter rib correspondence position has corresponding acute angle conduit, and the top roll of lower roll cutter rib correspondence position has corresponding acute angle conduit;

At least one pair of shaping roller, its top roll is fluted, and lower roll has boss, and the block piece of the lateral thrust of providing is provided in the outside.

7. according to the roll bending equipment of the described cold-bending dovetail groove in fireproofing accurate steel materials of claim 6, it is characterized in that described block piece is catch roller or edge-on roller.