KR20150073807A

KR20150073807A - Roll forming method

Info

Publication number: KR20150073807A
Application number: KR1020130161915A
Authority: KR
Inventors: 최수영; 이문용
Original assignee: 주식회사 성우하이텍
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2015-07-01

Abstract

Disclosed is a roll forming method capable of removing a cutting step in a postpocess, and improving a quality of a cut part of the products by placing the sheet materials cut from a coil in accordance to a size of the products in a cutting step before a roll forming step into the roll forming step. According to an embodiment of the present invention, the roll forming method comprises: (S1) an uncoiling step of uncoiling a coil as a material through an uncoiler in a front side of a processing line; (S2) a feeding step of feeding the coil in a process running direction while straightening the coil uncoiled from the uncoiler to a flat panel; (S3) a piercing step of piercing multipurpose holes for the assembly of beams to be formed on the panel received from the feeding step using a piercing press behind the feeding step; (S4) a cutting step of cutting the panel received from the piercing step to a predetermined sized sheet using a blanking press behind the piercing step; (S5) a roll forming step of roll-forming the pierced sheets to a single forming beam to be desired by successively bending the sheets using a roll forming unit having at least a 10-stepped roll former behind the cutting step; and (S6) a bending step of bending the roll-formed single forming beams to form beams at a predetermined curvature and a predetermined length by forming the single forming beams through a round bender at the predetermined curvature behind the roll forming step.

Description

[0001] ROLL FORMING METHOD [

The present invention relates to a roll forming method, and more particularly, to a roll forming method in which, in a roll forming forming step, a sheet forming step is preceded by a cutting step before a roll forming step, .

Generally, the roll forming method is a method in which a roll former unit which rolls a coil and constitutes a pair of an upper roll and a lower roll is passed through a roll former unit which is arranged in a row in multiple stages and is bent and formed into various shapes. A straight type beam current which is bent and formed into various shapes is produced.

FIG. 1 is a process flowchart of a roll forming method according to the prior art for achieving the roll forming method.

That is, in the roll forming method according to the related art, an uncoil step (S101) for uncoiling a coil (C) to be a material is performed in advance of the process line through an uncoupler, and a coil ) Is fed to the panel P of the flat plate while feeding it.

A piercing step (S103) for forming holes for various purposes for assembling the beam to be formed in the panel (P) supplied from the feeding step (S102) by using a piercing press at the back of the feeding step (S102) .

Following the piercing step (S103), the pierced panel (P) is successively folded and formed through a roll forming unit on which at least ten rollers are disposed, and the roll forming The roll forming step (S104) is performed.

Thereafter, in the rear of the roll forming step S104, a bending step S105 is performed in which the formed beam B1 formed by the roll forming is curved by a round bender and is bent into a forming beam B2 having a predetermined curvature .

Following the bending step (S105), a cutting step (S106) for cutting the curved forming beam (B2) to a predetermined standard is performed through a cutting press to produce a molded product (F) having a predetermined length.

FIG. 2 shows an example of a molded product F produced through such a roll forming method. In FIG. 2, the bumper beam 200 is shown to be bent in a predetermined shape along the longitudinal direction and formed by roll forming.

However, in the case where the molded product F produced by the above-described roll forming method has a closed end face, the internal pressurizing process is performed by the cutting press in the final cut step S106 in the process direction in which all the shapes of the molded product F are prepared. There is a problem that the cut surface CF is cut by the cutting edge and the shape of the cut surface CF is distorted.

Accordingly, the shape of the crushed cut surface CF must be machined to conform to the specifications through the post-processing by the operator, which causes the productivity to be lowered.

In the embodiment of the present invention, in the roll forming step, the sheet material obtained by preliminarily cutting the coil to the size of the product before the roll forming step is introduced into the roll forming step before the roll forming step, And a roll forming method for improving the quality of a cut portion of the product.

In one or more embodiments of the present invention, an uncoil step (S1) is performed to uncoil the material through the uncoiler in front of the process line; A feeding step (S2) of feeding a coil unwound from the uncoiler to a process advancing direction while spreading the coil to a flat panel; A piercing step (S3) for piercing holes for various uses for assembling the beam to be shaped into the panel supplied from the feeding step using a piercing press, behind the feeding step; A cutting step (S4) of cutting a panel supplied from the piercing step to a predetermined length by using a blanking press at the back of the piercing step and cutting it into a sheet of a predetermined standard; (S5) in which the pierced-formed sheet is subjected to roll-forming in the shape of a single-piece molding beam to be obtained by successively bending-molding the pierced-formed sheet through a roll-forming unit having at least 10 roll- ); And a banding step (S6) of forming the single-piece forming beam that has been roll-formed from the roll forming step to a predetermined curvature through a round bender and bending the single-piece forming beam to a shaping beam of a predetermined curvature and a predetermined length at the rear of the roll forming step .

Further, the forming beam may have a plurality of closed end faces.

In the cutting step S4, the panel supplied from the piercing step may be cut to a predetermined length using a laser cutter, and cut into sheets of a predetermined standard.

In the cutting step S4, the panel supplied from the piercing step may be cut to a predetermined length using a running cutter, and cut into sheets of a certain standard.

In the embodiment of the present invention, in the roll forming step, the sheet material obtained by preliminarily cutting the coil so as to match the size of the product before the roll forming step is introduced into the roll forming step to exclude the cutting step in the subsequent step And the quality of the cut portion of the product can be improved.

In addition, in the cutting step, the panel material of the flat plate is cut, not the forming beam, so that the durability of the cutting press against the cutting edge can be preserved and the quality of the material can be minimized by minimizing the amount of deformation due to the material property and cutting. It is effective.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a process flow diagram of a roll forming method according to the prior art; Fig.
2 is an exemplary view of a bumper beam produced according to a roll forming method of the prior art.
3 is a step-by-step process diagram of a roll forming method according to an embodiment of the present invention.
4 is an exemplary view of a bumper beam produced according to the roll forming method of an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the present invention is not limited to the illustrated embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention. .

In order to clearly explain the embodiments of the present invention, parts that are not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 3 is a step-by-step process chart of a roll forming method according to an embodiment of the present invention, and FIG. 4 is an exemplary view of a bumper beam produced according to the roll forming method of the embodiment of the present invention.

Referring to FIG. 3, the roll forming method according to the embodiment of the present invention includes an uncoiling step S1, a feeding step S2, a piercing step S3, a cutting step S4, a roll forming step S5, and a bending step S6 are sequentially performed.

The uncoil step S1 releases the coil that becomes the material through the uncoiler at the front of the process line.

As such, the coil unwound from the uncoiler is fed to the feeding step S2.

In the feeding step S2, the coil unwound from the uncoiler is fed to the flat panel P and fed to the process advancing direction.

The feeding step S2 may be performed using a facility such as a straightener.

From the feeding step S2, the flat panel P spread flat is supplied to the piercing step S3.

The piercing step S3 is a step of piercing a plurality of holes for assembling the beam to be formed on the panel P supplied from the feeding step S2 by using a piercing press at the rear of the feeding step S2, .

In the piercing step S3, the above-described piercing press can be applied, but a break press or the like can be applied.

The pierced panel P from the piercing step S3 is supplied to the cutting step S4.

In the cutting step S4, the panel P fed from the piercing step S3 is cut to a predetermined length using a blanking press at the back of the piercing step, and cut into a sheet S having a predetermined size.

Here, in the cutting step S4, the panel P may be cut into the sheet S by using a blanking press, but it may be cut using a laser cutter or a running cutter instead of the blanking press.

In addition, the sheet S to be cut by the blanking press is cut in accordance with the length of the final molded product F in its standard.

The sheet S cut from the cutting step S4 is supplied to the roll forming step S5.

The roll forming step S5 is a step in which at least ten or more roll formers are disposed behind the cutting step S5 in such a manner that the sheet S is pierced in the piercing step S3 and cut in the cutting step S4 And then subjected to roll-forming in the shape of the single-piece molding beam B to be obtained by successively bending-molding through the roll-forming unit.

At this time, in the roll forming step S5, the sheet S to be fed is formed by a multi-step bending process through a forming roll with a forming beam B having an open end face or at least one closed end face.

Thus, the forming beam B, which is formed by the roll forming in the roll forming step S5, is supplied to the bending step S6.

The bending step S6 is a step of forming the single-piece forming beam B, which has been roll-formed and formed after the roll forming step S5, into a predetermined curvature through a round bender, To produce the final molded product (F).

Therefore, according to the roll forming method according to the embodiment of the present invention having the above-described steps, the cutting step S4 is performed prior to the roll forming step S5 in the roll forming forming step, The sheet material preliminarily cut with the coil is put into the roll forming step S5.

Accordingly, it is possible to exclude the previous cutting step in the subsequent step, and the cutting operation can be performed on the panel P of the flat panel, so that the quality of the cut part of the final product can be ensured.

Referring to FIG. 4, in particular, when the final product has a plurality of closed end faces such as the bumper beam 10, there is no deformation of the cut face CF, and it can be produced in a standard meeting specifications.

In addition, in the cutting step preceding the roll forming step, durability of the cutting press with respect to the cutting edge can be preserved by cutting the flat panel P rather than the forming beam B, So that the product quality can be guaranteed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

C: Coil
P: Panel
S: Sheet
B, B1, B2: forming beam
F: Molded product
CF: section
10, 100: Bumper beam

Claims

In the roll forming method,
An uncoiling step S1 for loosening a coil to be a material through an uncoiler in front of the processing line;
A feeding step (S2) of feeding a coil unwound from the uncoiler to a process advancing direction while spreading the coil to a flat panel;
A piercing step (S3) for piercing holes for various uses for assembling the beam to be shaped into the panel supplied from the feeding step using a piercing press, behind the feeding step;
A cutting step (S4) of cutting a panel supplied from the piercing step to a predetermined length by using a blanking press at the back of the piercing step and cutting it into a sheet of a predetermined standard;
(S5) in which the pierced-formed sheet is subjected to roll-forming in the shape of a single-piece forming beam to be obtained by successively bending-molding the pierced-formed sheet through a roll forming unit having at least ten rollers disposed thereon );
And a banding step (S6) of forming the single-piece forming beam that has been roll-formed from the roll forming step to a predetermined curvature through a round bender and bending the single-piece forming beam to a shaping beam having a predetermined curvature and a predetermined length at the rear of the roll forming step.

The method according to claim 1,
The shaping beam
And a plurality of closed end faces.

The method according to claim 1,
The cutting step (S4)
Wherein the panel fed from the piercing step is cut to a predetermined length by using a laser cutter and cut into a sheet of a predetermined standard.

The method according to claim 1,
The cutting step (S4)
Wherein the panel supplied from the piercing step is cut to a predetermined length using a running cutter, and cut into a sheet of a predetermined standard.

In the roll forming method,
An uncoiling step of loosening the coil as a material through an uncoiler in front of the process line;
A feeding step of feeding a coil unwound from the uncoiler to a process advancing direction while spreading the coil with a flat panel;
A cutting step of cutting a panel supplied from the feeding step using a blanking press at a rear side of the feeding step to a predetermined length and cutting it into a sheet of a predetermined standard;
A roll forming step of forming the pierced molded sheet by roll forming in the shape of a single piece molding beam to be obtained by successively bending the pierced molded sheet through a roll forming unit in which at least ten or more roll formers are disposed;
And a bending step of bending the single-piece forming beam formed by roll-forming at a predetermined curvature through a round bender at a rear side of the roll forming step and bending the single-piece forming beam into a forming beam having a predetermined curvature and a predetermined length.

6. The method of claim 5,
The shaping beam
And a plurality of closed end faces.

6. The method of claim 5,
The cutting step
Wherein the panel fed from the piercing step is cut to a predetermined length by using a laser cutter and cut into a sheet of a predetermined standard.

6. The method of claim 5,
The cutting step
Wherein the panel supplied from the piercing step is cut to a predetermined length using a running cutter, and cut into a sheet of a predetermined standard.