KR100965757B1 - Flange hemming apparatus using roll - Google Patents

Abstract

PURPOSE: A flange hemming apparatus using rolls is provided to secure hemming quality through simultaneous four-stage hemming and to reduce the load of a hemming robot by minimizing the moving trace. CONSTITUTION: A flange hemming apparatus comprises a head body(10), a driving part(12), a rotational plate(14), first through fourth hemming rolls(18), and first and second assist rolls(20,21). The driving part is fixed to a base(11) of the head body. The rotational plate is coupled with an output shaft(13) of the driving part. The first through fourth hemming rolls are arranged at the angular intervals of 90° on the front side of the rotational plate. The assist rolls are installed on two supports(19a,19b) at the interval of 90°.

Description

Flange hemming apparatus using roll

The present invention relates to a flange hemming apparatus using a roll, and more particularly, to a flange hemming apparatus using a roll that can efficiently perform a hemming operation on a vehicle body panel using a robot arm.

In general, a car manufacturer requires a process of assembling 2 to 30,000 parts several times.

For example, in the case of the car body, as a first step in the automobile manufacturing process, the product panel is produced through various kinds of press equipment, and then moved to the car body factory to assemble each part of the product panel. The body of the form is formed.

As described above, in order to mold the body panel, after pressing the molding process in a certain form through various press equipments, presses such as trimming, piercing, flanging, and hemming In the process, subsequent processing operations such as cutting, hole making, bending and bending are performed.

The end parts of the sunroof, door, hood, trunk lid, wheel arch, and fender of the vehicle are processed by the hemming process, and the welding surface is secured to the local part to compensate for the lack of joint strength caused by the hemming and face welding. Work to secure the bonding strength.

In addition, after the edge of the inner panel is flanged and clinched into the inner part during the hemming operation, a hemming sealer is applied to the gap formed by the clinching, and a hemming operation is performed while the inner panel is inserted. Through the painting process, it is heat cured to exhibit adhesive performance.

Up to now, the hemming method is to install the mold of the panel in a press-type dedicated machine, the outer panel and the inner panel are put into the mold, and then the press die is lowered to fold and combine the panel ends.

In the case of such a hemming method, since an expensive mold having a shape similar to that of forming a panel must be manufactured, initial capital investment is largely disadvantageous, and the size of the press body is considerable, which is disadvantageous in the layout configuration inside the factory.

In addition, in the case of a multi-vehicle mass production line to respond while changing the mold, productivity is reduced because a lot of time and effort according to the replacement of the mold.

In order to solve such problems, a roll hemming system using a robot arm has recently been applied.

The roll hemming system performs a hemming operation by rolling a roll according to the behavior of the robot arm by attaching a roll head to the robot arm. The roll hemming system places the inner panel inside the folded outer panel and angles the flange to the drop angle. After bending, the hemming is performed by pressing with a hemming punch to plastically deform the inner panel and the outer panel.

The conventional roll hemming system consists of four roll heads at each position of the head body, that is, a primary roll head, a secondary roll head, a tertiary roll head, and a fourth roll head separately. Hemming operation is performed by using the movement of the robot arm.

However, the conventional roll hemming system has a disadvantage in that the efficiency of the hemming operation associated with the movement trajectory of the robot arm is lowered because each roll head is provided separately.

For example, because the roll head (including the back-roll roll) that performs each hemming performs the corresponding hemming operation at a fixed position, the robot arm must rotate each time to make a corresponding hemming operation for each roll head. In other words, the efficiency of the hemming work is greatly reduced, such as a separate teaching program for each step.

In addition, there is a disadvantage that it is difficult to ensure the quality of the hemming as desired because the connection between the hemming operation for each molding step is inferior.

Accordingly, the present invention has been made in view of the above, and a new form of roll hemming means and method for arranging a plurality of rolls on one roll head to sequentially perform a hemming operation step by step while sequentially rotating each roll. By implementing the four-step hemming operation on the body panel, it is possible to ensure excellent hemming quality, especially the hemming operation corresponding to each roll by rotating the roll while the robot arm is fixed. The purpose of the present invention is to provide a flange hemming device using a roll that can improve the efficiency of the overall hemming operation, such as being able to effectively perform a four-step hemming operation with only one step teaching program.

Flange hemming device using a roll provided in the present invention for achieving the above object is a head plate, a drive unit fixedly installed on the base of the head body, a rotating plate rotatably coupled to the output shaft of the drive unit, respectively in front of the rotating plate The first hemming roll, the second hemming roll, the third hemming roll and the fourth hemming roll, which are arranged at intervals of 90 ° and perform stepwise hemming sequentially by the rotational operation of the rotating plate, are installed extending toward the front of the head body. Each roll is installed on two supporting objects and is formed to include a first auxiliary roll, a second auxiliary roll, and the like, which are selectively paired with each hemming roll while maintaining a 90 ° interval to each other. It features the ability to continuously perform hemming work step by step with the head.

Here, it is preferable to attach the whole roll head including the head body or the like to the robot arm to perform hemming, or to attach to the structure so that the robot arm can carry out the hemming while holding the panel.

In the case of the roll head, a four-step hemming operation may be performed by a one-step teaching program of the robot arm.

Flange hemming device using a roll according to an embodiment of the present invention provides the following advantages.

First, since it is composed of one roll head, the four-step hemming operation can be efficiently performed only by the one-step teaching program of the robot arm.

Secondly, the four-step hemming operation can be performed collectively with one roll head, which ensures excellent hemming quality and shortens the time required for hemming.

Third, the movement trajectory of the robot arm can be minimized, thereby reducing the load caused by the robot during hemming.

Fourth, the roll head may be attached to the robot arm for hemming, and the roll head may be attached to the structure, and the robot arm may be hemmed while holding the panel.

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

1 is a perspective view showing a roll head according to an embodiment of the present invention, Figures 2 and 3 are a perspective view and an enlarged view showing a state in which the roll head according to an embodiment of the present invention attached to the robot arm.

As shown in Figs. 1 to 3, the roll hemming system of the present invention provides a rotary plate operated by a motor on one roll head, and four hemming rolls are installed on the rotary plate at intervals of 90 °, It is composed in such a way that hemming can be performed step by step.

To this end, a disc-shaped head main body 10 is provided, and a front base 11 of the head main body 10 which extends from the center to the front is installed at the same time, and two long extending from the outer side to the front. Supports 19a and 19b are installed.

At this time, the two support (19a, 19b) is a part for supporting the first and second auxiliary roll 20 and the second auxiliary roll 21, which will be described later, respectively, are positioned at a 90 ° interval to each other, in particular one support That is, the support 19a supporting the first auxiliary roll 20 is supported by the structure connected to the rod of the cylinder 22, and moves the position in the front and rear direction together with the first auxiliary roll 20 mounted on the front side. It becomes possible.

Here, the cylinder 22 is supported in a horizontal position on the front of the head body 10 by the rear pin structure.

In addition, the base 11 is provided with a driving unit 12, in which the driving unit 12 is a driving means combining a motor and a reduction gear, and serves to rotate the rotating plate 14 mounted on the output shaft 13. Will be

The motor of the drive unit 12 is preferably applied to a step motor capable of rotation control by dividing by 90 ° every 1 step hemming progression.

Here, one step means an operation in which one hemming roll performs hemming once.

A rotating plate 14 serving as an index (split 90 °) while supporting four hemming rolls is provided, and the rotating plate 14 is mounted to the output shaft 13 of the drive unit 12.

Accordingly, by the operation of the drive unit 13, the rotating plate 14 is able to rotate by 90 degrees, or in some cases 180 degrees.

Four hemming rolls that substantially perform each step of hemming work, that is, a primary hemming roll 15, a secondary hemming roll 16, a tertiary hemming roll 17, and a fourth hemming roll 18 are provided. Each hemming roll is installed in a predetermined arrangement on the rotating plate 14.

For example, the primary hemming roll 15 is disposed at the 0 ° position of the rotating plate 14 in the form of a disc, and the secondary hemming roll 16, 180 is located at the 90 ° position along the clockwise direction. The fourth hemming roll 18 is disposed in the ° position, and the third hemming roll 17 is disposed in the 270 ° position, respectively.

Here, the primary hemming roll 15 serves to perform initial bending (about 30 to 45 °), and the secondary hemming roll 16 serves to perform flange intermediate bending (about 80 to 90 °). , The third hemming roll 17 serves to perform the flange three-stage bending (about 130 ~ 140 °), the fourth hemming roll 18 serves to perform the complete flange bending (180 °).

Accordingly, by the rotation of the rotating plate 14, each hemming roll is able to hemming sequentially while moving to the next step by rotating 90 ° every one step.

In addition, two auxiliary rolls which are paired together with the hemming rolls and hemming together are provided, that is, a first auxiliary roll 20 and a second auxiliary roll 21 positioned while maintaining a 90 ° interval to each other. .

The first auxiliary roll 20 and the second auxiliary roll 21 are installed on the respective support bases 19a and 19b in the head main body 10, and any one hemming roll is rotated by the rotation of the rotating plate 14. When he is placed where he is, hemming of the panel is possible with this hemming roll.

The roll head configured as described above, that is, the entire head body 10 including each hemming roll, an auxiliary roll, a driving unit, and the like, can perform a hemming operation in two operating methods.

For example, the roll head 100 may be attached to the robot arm 110 and the body panel may be operated in a hemming operation while being fixed on the bed, or the roll head 100 may be fixed to the structure. And the hemming operation in the state of holding the body panel with the robot arm 110 can be operated.

Here, when hemming is performed by attaching the roll head 100 to the robot arm 110, there is an advantage in that a four-step hemming operation may be sequentially performed by a one-step teaching program of the robot arm 110.

That is, in the past, in order to perform the four-step hemming operation, that is, each step from the first hemming to the fourth hemming, all the 1 to 4 step teaching programs of the robot arm 110 were required. By using the rotation method of each hemming roll indexed by the rotating plate 14, it becomes possible to perform a 4 step hemming operation only by the one-step teaching program of the robot arm 110. FIG.

Therefore, the process of performing the hemming operation using the roll head of the roll hemming system configured as described above will be described.

4 to 7 is a front view, a plan view and a side view showing the first to fourth hemming process of the roll head according to an embodiment of the present invention.

First, the hemming of the vehicle body panel 120 is made based on an area in which the hemming block is located, and the hemming block at this time is the first hemming block 130 and the second hemming block disposed at 90 ° intervals. 140, where the first hemming block 130 has a first hemming, while the second hemming block 140 includes a second hemming, a third hemming, and a fourth hemming.

As shown in FIG. 4, the first hemming roll 15 and the first auxiliary roll 20 are shown here.

The primary hemming roll 15 and the first auxiliary roll 20 are positioned toward the vehicle body panel 120 supported by the first hemming block 130, and the vehicle body panel 120 is moved by the movement of the robot arm 110. The first hemming for is in progress.

Primary hemming is the operation of initial bending (30-44 °) of the corners, sharps and sharps of the panel.

As shown in FIG. 5, the second hemming roll 16 and the second auxiliary roll 21 are shown here.

The secondary hemming roll 16 and the second auxiliary roll 21 are positioned toward the vehicle body panel 120 supported by the second hemming block 140, and the vehicle body panel 120 is moved by the movement of the robot arm 110. A second hemming is in progress.

At this time, the second hemming after the first hemming can be made by hemming only by rotating the posture of the robot arm 110 by 90 ° without rotating the rotating plate 14.

Secondary hemming is the process of performing two-step intermediate bending and finishing of flanges with panel flanges of 80-90 °.

As shown in FIG. 6, the third hemming is performed by the third hemming roll 17 and the second auxiliary roll 21.

By the rotation of the rotating plate 14 in a clockwise 180 ° rotation, the tertiary hemming roll 17 is located toward the vehicle body panel 120 supported by the second hemming block 140 while mating with the second auxiliary roll 21. By the movement of the robot arm 110, the third hemming with respect to the vehicle body panel 120 proceeds.

The third hemming is a three-step bending of the flange of the panel by 130 ~ 140 °.

As shown in Fig. 7, the fourth hemming roll 18 and the second auxiliary roll 21 show a state where the fourth hemming is performed.

When the rotating plate 14 is rotated 90 ° clockwise again after the third hemming, the fourth body hemming roll 18 is paired with the second auxiliary roll 21 and is supported by the second hemming block 140. Positioned toward the side 120, the fourth hemming with respect to the vehicle body panel 120 proceeds by the movement of the robot arm (110).

The fourth hemming is the complete bending of the panel flanges by 180 °.

Here, in the case of the first auxiliary roll 20, it is possible to appropriately move the front and rear positions through the operation of the cylinder 22 to avoid interference with the hemming rolls due to the rotation of the rotary plate 14.

As described above, in the roll hemming system of the present invention, a roll set may be radially formed on one roll head to bend the panel in four steps, and a hemming operation of bending the angle to 0 ° based on the panel state 180 ° may be performed. have.

1 is a perspective view showing a roll head according to an embodiment of the present invention

2 is a perspective view illustrating a state in which a roll head is attached to a robot arm according to an embodiment of the present invention;

3 is an enlarged view showing a state in which a roll head is attached to a robot arm according to an embodiment of the present invention;

4 is a front view, a plan view, and a side view showing a primary hemming process of a roll head according to an embodiment of the present invention.

5 is a front view, a plan view and a side view showing the secondary hemming process of the roll head according to an embodiment of the present invention

6 is a front view, a plan view, and a side view showing a tertiary hemming process of the roll head according to one embodiment of the present invention;

7 is a front view, a plan view, and a side view illustrating a fourth hemming process of a roll head according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: head body 11: base

12: drive unit 13: output shaft

14: rotating plate 15: primary hemming roll

16: secondary hemming roll 17: tertiary hemming roll

18: 4th hemming roll 19a, 19b: support

20: first secondary roll 21: second secondary roll

22: cylinder

Claims (5)

A head body 10 constituting the main body of the roll head; A driving unit 12 fixedly installed on the base 11 of the head body 10; A rotating plate (14) rotatably coupled to the output shaft (13) of the drive unit (12); Primary hemming rolls 15, secondary hemming rolls 16, and tertiary, each of which is disposed at 90 ° intervals in front of the rotating plate 14 and sequentially performs hemming step by step by rotating the rotating plate 14. Hemming roll 17 and quaternary hemming roll 18; A first auxiliary which is installed on two supports 19a and 19b extending forwardly of the head main body 10 and selectively pairs with each hemming roll while maintaining a 90 ° interval to each other. A roll 20 and a second auxiliary roll 21; Including, Flange hemming device using a roll, characterized in that to perform the step-by-step hemming operation continuously with one roll head. 2. The flange hemming of claim 1, wherein the entire support 19a including the first auxiliary roll 20 is connected to and supported by the rod of the cylinder 22 to move the position in the front-rear direction. Device. 2. The hemming roll 16 of claim 1, wherein each hemming roll disposed on the rotating plate 14 is rotated clockwise with respect to the primary hemming roll 15 disposed at a 0 ° position. Flange hemming device using a roll, characterized in that arranged in the order of the fourth hemming roll (18) at the 180 ° position, the third hemming roll (17) at the 270 ° position. The roll head of claim 1, wherein the entire head body 10 including the hemming rolls and the auxiliary rolls is attached to a robot arm to perform hemming, or attached to a structure to perform hemming. Used flange hemming device. The flange hemming device using a roll according to claim 1, wherein a hemming operation of four steps can be performed by a one-step teaching program of the robot arm.

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