KR20150079017A

KR20150079017A - Round bender

Info

Publication number: KR20150079017A
Application number: KR1020130168958A
Authority: KR
Inventors: 조국래; 이문용
Original assignee: 주식회사 성우하이텍
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-08

Abstract

The round vendor is started. A round bender according to an embodiment of the present invention includes a plurality of bending roll units disposed along a process line between two side bender frames for curvature forming an intimate forming beam, The upper and lower bending rolls being configured to be rotationally driven between the two side bender frames, wherein the forming beam is curved through a gap between the upper and lower bending rolls and curvature-shaped at a certain curvature, Variable bending roll unit for changing the radius of curvature with respect to a certain section of the shaping beam while the press bending roll moves back and forth upward by the cam action of the cam block and the cam slider.

Description

Round Bender {ROUND BENDER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curvilinear molding apparatus, and more particularly, to a round bender for curvilinear molding by varying a radius of curvature at an end of a forming beam curvature-shaped at a predetermined curvature.

In general, a molded product having a certain curvature such as a bumper beam for a vehicle is formed by forming a straight beam of a forming beam through a roll forming method, and then curved in a predetermined curvature while being passed through a curvilinear molding apparatus.

In a general roll forming method, a roll former unit in which a roll former constituting a pair of an upper forming roll and a lower forming roll by loosening a coil is passed through a roll former unit arranged in a row in multiple stages and is bent and formed into various shapes. And is applied to manufacture a straight type forming beam bent in various shapes.

1 is a schematic view of a general roll forming system and its steps.

Referring to FIG. 1, the roll forming system and its process are carried out in an uncoil step S1, in which an uncoiler 1 for uncoiling a fed coil 10 is arranged in front of a process line.

A straightener 2 is provided behind the uncoiler 1 in the process direction to extend the coil 10 unwound from the uncoiler 1 to the flat panel 20 to proceed the straightening step S2 .

A brake press 3 for forming holes for various purposes is provided on the panel 20 supplied from the straightener 2 in the process direction of the straightener 2 to proceed with the piercing step S3.

A roll forming unit 4 composed of at least seven roll formers R1 to R7 (not shown) is disposed behind the brake press 3 in the process direction, and the uncoiler 1, the straightener 2 And the panel 20 supplied through the brake press 3 are successively subjected to a roll forming step S4 in which a forming beam 30 is formed by bending and shaping.

The laser welder 5 irradiates the welding portion of the forming beam 30 by using the laser beam outputted from the laser oscillator 5a and proceeds to the welding step S5 in the rear of the roll forming unit 4 in the process direction .

A bending step S6 of forming a forming beam 40 having a predetermined curvature by passing a forming beam 30 through a round bender 6 with a curvature forming device is provided behind the laser welding machine 5 Go ahead.

At the rear of the round bender 6 in the process direction, a cutting press 7 is provided, and a cutting step S7 is performed in which the forming beam 40 is cut according to the standard of finished products for commercialization.

2 is a side view of a general round vender.

Referring to FIG. 2, the round bender 6 includes five stages of bending roll units.

The first bending roll unit BR1 is constituted by a pair of upper and lower bending rolls in the upper and lower parts in the process direction on the bender frame 6a, ) Through the welding step S5 to guide the forming beam 30 supplied.

The second bending roll unit BR2 is also formed by paired upper and lower bending rolls in the process direction of the first bending roll unit BR1 on the bender frame 6a, ) In the radial direction of the curvature.

The third, fourth and fifth bending roll units BR3, BR4 and BR5 are arranged in order behind the process direction of the second bending roll unit BR2 on the bender frame 6a along the radius of curvature to be formed , Each of which is constituted by a pair of upper and lower bending rolls.

The forming beam 30 passes through the third, fourth, and fifth bending roll units BR3, BR4, and BR5 and is formed into a forming beam 40 having a predetermined curvature.

The bumper beam 50 for a vehicle as shown in Fig. 3 is produced through such a roll forming system and its processes.

The bumper beam 50 is disposed in the vehicle width direction from the front and rear of the vehicle, and is connected to a front side member (not shown) through a stay (not shown) or the like.

In recent years, there has been a tendency to apply a multi-step curvature to the bumper beam 50 for the sake of preventing sophisticated design of the vehicle and interference with other components of the bumper unit.

As shown in FIG. 3, the bumper beam 50 applying the multi-stage curvature is formed by curvilinear molding at both ends with a smaller radius of curvature than the central portion.

That is, the bumper beam 50 has a first curvature portion 51 having a first radius of curvature equal to the predetermined radius of curvature, and a second curvature portion 51 located at both ends of the first curvature portion 51, And a second curvature portion 52 having a second radius of curvature.

However, since the conventional round bender 6 shown in Fig. 2 can form only the forming beam 40 having one curvature, the second curvature 40 is formed at both ends of the bumper beam 50 as shown in Fig. In order to form the part 52, an additional bending operation must be performed through a separate bending unit.

Therefore, there is a problem that the production cost of the bumper beam is increased, and the installation cost for installing a separate bending unit is increased.

It is an object of the present invention to provide a round bender capable of producing a forming beam having a first curvature portion and a second curvature portion by improving a conventional round bender without additionally providing a separate bending unit.

In one or more embodiments of the present invention, there is provided a round bender comprising a plurality of bending roll units disposed along a process line between two side bender frames for curvilinear forming an intensional forming beam, Wherein the forming beam is configured to curvature at a constant curvature through a gap between the upper and lower bending rolls, wherein the forming beam is curvilinearly formed at a predetermined curvature between the upper and lower bending rolls, And a curvature variable bending roll unit for changing the radius of curvature with respect to a certain section of the forming beam while the press bending roll is moved back and forth upward by the cam action of the cam block and the cam slider have.

In addition, the curvature-variable bending roll unit may include a press bending roll in which the rotary shaft is disposed at a lower portion of the rear space between the two side bender frames so as to be movable forward and backward through a slider in a slide groove of the side bender frame; A cam slider connected to the lower side of the slider and vertically moved, the cam slider having a first slope; A cam block which is horizontal with the cam slider and has a second inclined surface in cam contact with the first inclined surface; And a driving motor connected to the cam block by a screw shaft and reciprocating the cam block horizontally; &Lt; / RTI >

The pressing bending roll may be rotatably mounted on the slider through a bearing unit.

The driving motor may be a servo motor capable of controlling the rotational speed and the rotational direction.

The embodiment of the present invention can improve a conventional round bender without additionally providing a separate bending unit to produce a forming beam having the first curvature portion and the second curvature portion.

Accordingly, the production process and the production cost are reduced, and the installation cost due to the additional bending unit is not required.

1 is a schematic view of a general roll forming system and its steps.
2 is a side view of a general round vender.
3 is a perspective view of a bumper beam produced through a typical roll forming system and process.
4 is a side view of a round bender according to an embodiment of the present invention.
5 is a state before operation of a curvature-variable bending roll unit applied to a round bender according to an embodiment of the present invention.
6 is an operational state diagram of a curvature variable bending roll unit applied to a round bender according to an embodiment of the present invention.

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

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

In the following description, the names of the components are denoted by the first, second, etc. in order to distinguish them from each other because the names of the components are the same and are not necessarily limited to the order.

As shown in Fig. 1, the round bender 6 according to the embodiment of the present invention curves the forming beam 30 of the straight pipe which is applied to the roll forming system and formed by roll forming.

1, a roll forming system to which a round bender 6 according to an embodiment of the present invention is applied, and a roll forming process using the roll forming system, includes an uncoiler 1 for uncoiling the coil 10, And proceeds to the uncoil step S1.

A roll forming unit 4 composed of at least seven roll formers R1 to R7 (not shown) is disposed behind the brake press 3 in the process direction, (Step S4) of performing roll forming in the shape of a forming beam 30 to be obtained by successively bending and forming the first and second resin films 20 and 20.

A round bender 6 according to an embodiment of the present invention is provided behind the laser welder 5 in the process direction to pass the forming beam 30 so that the forming beam 40 The bending step S6 is performed.

Further, a cutting press 7 is provided behind the round bender 6 in the process direction, and a cutting step S7 for cutting the forming beam 40 according to the standard for the finished product is carried out.

3, a first curvature portion 51 having a first radius of curvature is formed at the center portion of the roll forming system and its process, particularly, the round bender 6 according to the embodiment of the present invention, And a second curvature portion 52 having a second radius of curvature smaller than the first radius of curvature at both ends of the bumper beam 50 are formed.

4 is a side view of a round bender according to an embodiment of the present invention.

4, the round bender 6 according to the embodiment of the present invention includes five bending roll units BR1 to BR5, and is configured to vary the forming beam 30 of the straight pipe formed by roll forming Curvature molding. In the embodiment of the present invention, five bending roll units BR1 to BR5 are applied, but the present invention is not limited thereto.

The round bender 6 according to the embodiment of the present invention includes a base 61, a side bender frame 63 (one side not shown), and first to fifth bending roll units BR1 to BR5 disposed along the process line do.

The base 61 is installed on the mounting table of the roll forming system in the process direction, and the both side bender frames 63 (one side not shown) are spaced apart from the base 61 at regular intervals and are also installed in the process direction.

The two side bender frames 63 are connected to each other via a plurality of connecting rods 67 so as to maintain an interval therebetween.

The first bending roll unit BR1 is composed of a pair of a first upper bending roll UR1 and a first lower bending roll LR1 vertically in the process direction between the both side bender frames 63, Thereby guiding the forming beam 30.

Each of the first upper bending roll UR1 and the first lower bending roll LR1 is rotatably supported by a slider SR As shown in Fig.

The second bending roll unit BR2 includes a second upper bending roll UR2 and a second lower bending roll LR2 vertically behind the first bending roll unit BR1 between the two side bender frames 63, And supports the forming beam 30 in a radial direction of curvature.

The second upper bending roll UR2 and the second lower bending roll LR2 are rotatably supported by a slider SR (not shown) provided at both ends of the rotary shaft S so as to be slidable in the respective slide grooves SG of the both- As shown in Fig.

The sliders SR applied to the first bending roll unit BR1 and the second bending roll unit BR2 are divided into upper and lower sliders SR, And the position is adjustable by keeping the fixed state in the slide groove (SG) of the bender frame (63).

The third and fourth bending roll units BR3 and BR4 are disposed between the third lower bending roll UR3 and the third lower bending roll UR3 behind the second bending roll unit BR2 between the two side bender frames 63, The fourth lower bending roll LR3, the fourth upper bending roll UR4, and the fourth lower bending roll LR4 are sequentially formed along a radius of curvature to be formed. While passing the forming beam 30, .

The third and fourth bending roll units BR3 and BR4 are arranged such that both ends of the rotary shaft S of each of the third and fourth lower bending rolls LR3 and LR4 are inserted into the respective slide grooves SG And is rotatably installed at the lower portion of each moving block MB provided so as to be slidable on the moving block MB.

Each of the third and fourth upper bending rolls UR3 and UR4 is provided with a slider SR (not shown) provided so as to be slidable in a slide hole SH formed on the upper side of each of the moving blocks MB, Respectively.

The fifth bending roll unit BR5 includes a fifth upper bending roll UR5 and a fifth lower bending roll UR5 corresponding vertically behind the fourth bending roll unit BR4 between the two side bender frames 63 LR5 are formed to form a predetermined curvature while passing the forming beam 30 together with the third and fourth bending roll units BR3 and BR4.

That is, the fifth upper bending roll UR5 and the fifth lower bending roll LR5 are provided such that both ends of the respective rotary shafts S are slidably mounted on the respective slide grooves SG of the both-side bender frame 63, (SR).

The fifth bending roll unit BR5 includes a pressure bending roll GR, a cam slider 70, a cam block 71, and a drive motor M. [

The pressurizing bending roll GR is supported by a slider SR slidably provided in a slide groove SG formed at each lower side of the both-side bender frame 63 of the rotary shaft S through a bearing unit BU And is rotatably installed.

The cam slider 70 is connected to the lower side of the slider SR and is vertically moved. A first inclined surface 73 is formed on the side opposite to the slider SR.

The cam block 71 is formed with a second inclined surface 75 which is horizontal with the cam slider 70 and in cam contact with the first inclined surface 73.

The rotating shaft of the driving motor M is composed of a screw shaft MS and is connected to the cam block 71 in a horizontal direction to reciprocate the cam block 71 horizontally.

That is, the slider SR on which the pressure bending roll GR is installed is configured to move back and forth along the slide groove SG according to the rotation control of the drive motor M.

This is because the cam block 71 reciprocates horizontally while vertically moving the cam slider 70, which is in cam-contacting relation through the first and second sloping faces 73 and 75, vertically and downwardly, SR are moved back and forth together with the pressure bending roll GR.

The fifth bending roll unit BR5 forms a certain curvature while passing the forming beam 30 together with the third and fourth bending roll units BR3 and BR4, And the pressing bending roll GR is moved forward and backward by the drive control of the forming beam 30 to change the radius of curvature with respect to a certain section of the forming beam 30 to form the curved variable bending roll unit.

Here, the driving motor M may be a servo motor capable of controlling the rotational speed and the rotational direction, but is not limited thereto.

Hereinafter, the operation of the round bender 6 having the above-described configuration will be described with reference to Figs. 5 and 6. Fig.

FIG. 5 is a state before operation of a curvature variable bending roll unit applied to a round bender according to an embodiment of the present invention, and FIG. 6 is an operational state diagram of a curvature variable bending roll unit applied to a round bender according to an embodiment of the present invention .

5, the round bender 6 according to the embodiment of the present invention is configured such that, in the rear of the laser welding machine 5 of the roll forming system, 5 bending roll unit BR1 to BR5, the center portion and the both ends are curvilinearly formed into a forming beam 50 (see Fig. 3) having a different curvature.

That is, the forming beam 30 is guided through the first upper bending roll UR1 and the first lower bending roll LR1 of the first bending roll unit BR1 to form the second bending roll unit BR2 And is cloud-supported in the radial direction of curvature by the upper bending roll UR2 and the second lower bending roll LR2.

The shaping beam 30 passes through the third, fourth and fifth bending roll units BR3, BR4 and BR5 and is formed at a constant curvature. The radius of curvature of the shaping beam 30 6, the drive motor M rotates in the forward direction to cam the cam block 71 and the cam slider 70. [0052]

At this time, the pressing bending roll (GR) is advanced toward the forming beam (30) to change the radius of curvature of the molding beam (30) to be formed.

That is, the forming beam 30 passing through the fifth upper bending roll UR5 and the fifth lower bending roll LR5 is pressed against the forming beam 30 while the pressing bending roll GR moves forward Curvature is formed so that the radius of curvature of the constant section is smaller than the radius of initial curvature.

Accordingly, when the curvature adjustment is required for each section, the forming beam 30 can control the curvature of the driving motor M by controlling the driving motor M in the forward and backward direction. Thus, as shown in FIG. 3, The bumper beam 50 having the first curvature portion 51 having a radius of curvature and the second curvature portion 52 having a second radius of curvature smaller than the first radius of curvature at both ends can be produced at one time in the process.

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.

1: Uncoiler 2: Straightener
3: Brake press 4: Roll forming unit
5: Laser welder 6: Round bender
7: Cutting press 10: Coil
20: panel 30, 40: forming beam
50: bumper beam 51: first bending portion
52: second curvature portion 61: base
63: Bender frame 67: connecting rod
70: cam slider 71: cam block
73: first inclined plane 75: second inclined plane
BR1 to BR5: First to fifth bending roll units
UR1 to UR5: first to fifth upper bending rolls
LR1 to LR5: first to fifth lower bending rolls
S: rotation axis SG: slide groove
SR: Slider AB: Adjustment bolt
MB: moving block SH: slide hole
BU: Bearing unit M: Motor
MS: Screw shaft GR: Pressure bending roll

Claims

A round bender comprising a plurality of bending roll units disposed along a process line between two side bender frames for curvilinear forming a straight forming beam,
Wherein the plurality of bending roll units each include upper and lower bending rolls for rotationally driving between the two side bender frames, and the forming beam is curved through a gap between the upper and lower bending rolls at a predetermined curvature ,
And a curvature variable bending roll unit for changing the radius of curvature with respect to a certain section of the forming beam while the press bending roll is moved back and forth upward by the cam action of the cam block and the cam slider at the end of the processing line Round vendor.

The method according to claim 1,
The curvature-variable bending roll unit
A press bending roll in which a rotary shaft is disposed in a slide groove of the both-side bender frame so as to be movable forward and backward through a slider through a slider at a lower portion of a rear space between the both-side bender frames;
A cam slider connected to the lower side of the slider and vertically moved, the cam slider having a first slope;
A cam block which is horizontal with the cam slider and has a second inclined surface in cam contact with the first inclined surface; And
A driving motor connected to the cam block through a screw shaft and reciprocating the cam block horizontally;
Lt; / RTI >

3. The method of claim 2,
The press bending roll
Wherein the slider is rotatably mounted to the slider through a bearing unit.

3. The method of claim 2,
The drive motor
A round bender consisting of a servo motor capable of controlling the number of revolutions and the direction of rotation.

1. A round bender for curvilinearly shaping a forming beam of an intrinsic tube,
Base;
Side bender frame spaced apart from the base at regular intervals;
A first bending roll unit (BR1) having a pair of upper and lower bending rolls in the upper and lower parts in the process direction between the two side bender frames to guide the forming beam;
A second bending roll unit BR2 configured to pair the upper and lower bending rolls in the process direction of the first bending roll unit BR1 between the both side bender frames to roll the forming beam in the radial direction of curvature, ;
A pair of upper and lower bending rolls are sequentially arranged in the process direction of the second bending roll unit BR2 between the both side bender frames along the radius of curvature to be formed, Third and fourth bending roll units BR3 and BR4 for molding; And
A pair of upper and lower bending rolls are sequentially arranged in the process direction of the fourth bending roll unit BR4 between the both side bender frames along a radius of curvature to be formed, (BR3, BR4), a predetermined curvature is formed while passing the forming beam,
A cam slider and a cam block which are brought into cam contact by the driving of the motor at the rear of the lower bending roll move the pressure bending roll upward and downward to change the radius of curvature with respect to a certain section of the forming beam, A bending roll unit BR5;
Lt; / RTI >

6. The method of claim 5,
The curvature-variable bending roll unit
A press bending roll in which a rotary shaft is disposed in a slide groove of the both-side bender frame so as to be movable forward and backward through a slider through a slider at a lower portion of a rear space between the both-side bender frames;
A cam slider connected to the lower side of the slider and vertically moved, the cam slider having a first slope;
A cam block which is horizontal with the cam slider and has a second inclined surface in cam contact with the first inclined surface; And
A driving motor connected to the cam block through a screw shaft and reciprocating the cam block horizontally;
Lt; / RTI >

6. The method of claim 5,
The press bending roll
Wherein the slider is rotatably mounted to the slider through a bearing unit.

6. The method of claim 5,
The drive motor
A round bender consisting of a servo motor capable of controlling the number of revolutions and the direction of rotation.

At least three or more bending roll units are arranged along the process line in a pair between upper and lower bending rolls between upper and lower side bender frames which are spaced apart at regular intervals on the base so as to form curved forming beams of the tube In the round-vendor,
The bending roll unit at the end of the process line
A pair of upper and lower bending rolls arranged behind the process direction to form a predetermined curvature while passing a forming beam to be formed;
A press bending roll disposed at a lower portion between the two side bender frames such that the rotary shaft is movable in the slide groove of the side bender frame through a slider in a forward /
A cam slider connected to a lower side of the slider and having a first inclined surface;
A cam block which is horizontal with the cam slider and has a second inclined surface in cam contact with the first inclined surface; And
A driving motor connected to the cam block through a screw shaft and reciprocating the cam block horizontally; Including,
Wherein the pressing bending roll is moved upward by the cam slider and the cam block in accordance with driving of the driving motor to change the radius of curvature to a smaller value with respect to a predetermined section of the forming beam.

10. The method of claim 9,
The press bending roll
Wherein the slider is rotatably mounted to the slider through a bearing unit.

10. The method of claim 9,
The drive motor
A round bender consisting of a servo motor capable of controlling the number of revolutions and the direction of rotation.