KR101020824B1 - Roller hemming apparatus - Google Patents

Abstract

According to the present invention, the heating unit is integrally configured to preheat the flange portion of the outer panel when hemming the panel in which the light metal is used, so that the flange portion of the preheated outer panel is completed using the hemming roller. To minimize cracking in hemming parts

A roller hemming device mounted on an arm tip of a robot and hemming and forming a flange portion of an outer panel with respect to the tip of an inner panel, wherein an upper portion is connected to an arm tip of the robot, and a hemming roller means is mounted on one side of the lower arm to hemming. A pressurizing unit for providing a constant pressing force to the roller means; And a heating unit rotatably mounted on the other side of the lower part of the pressurizing unit and preheating the flange portion before hemming molding of the flange portion through the hemming roller means.

Outer panel, inner panel, flange part, hemming forming, roller hemming, heating unit, preheating

Description

Roller Hemming Device {ROLLER HEMMING APPARATUS}

The present invention relates to a roller hemming device, and more particularly, when hemming a panel made of a light metal and composed of an inner panel and an outer panel, the panel is heated in advance so as to increase the temperature of the panel prior to the molding process and then hemmed. The present invention relates to a roller hemming device for preventing the occurrence of internal and external cracks in a hemming molded part.

In general, 2 to 30,000 parts are manufactured through several assembly processes until the automobile manufacturer produces the automobile.

In particular, the car body is the first step in the automobile manufacturing process. After producing product panels through various kinds of press devices, the car body is moved to a car body factory, where each part of the product panels is assembled to form a white body (BIW) body. .

In order to form the panel as described above, after pressing the molding process to a certain form through various press equipments, cutting, pressing process such as trimming, piercing, flanging, hemming, etc. Through the process of hole machining, bending, bending.

1 is a process state diagram of a hemming operation using a roller hemming device according to the prior art, the conventional roller hemming device 100 is mounted to the tip of the arm 103 of the robot 101 made of a multi-joint arm is the robot 101 The flange F portion of the outer panel 109 is folded to the tip of the inner panel 107 while moving along the edges of the inner panel 107 and the outer panel 109 on the jig 105 by the operation of Heming will be processed.

The roller hemming device 100 is an arm of the robot 101 moving along the style line of the jig 105 (ie, the edge line of the panel) that supports the inner panel 107 and the outer panel 109. 103) The driving motor 111 is attached to the tip, and the hemming roller 113 is mounted to the rotating shaft of the drive motor 111.

In order to hemm the inner panel 107 and the outer panel 109 using the roller hemming device 100 configured as described above, the inner panel 107 and the outer panel 109 are first placed on the jig 105. ) Is clamped through a clamping unit (not shown).

Subsequently, at the tip of the arm 103 of the robot 101 that performs the operation set by the robot control panel 300 for each molded article, the hemming roller 113 is formed by the inner panel 107 and the outer according to the set angle of the robot 101. The flange F of the outer panel 109 is pressed while moving the edge of the panel 109 to complete the hemming molding.

However, the conventional roller hemming device as described above simply hemmes the flange portion of the outer panel through the hemming roller, and when hemming the flange portion of the outer panel manufactured by using a lightweight metal due to the weight reduction demand of the vehicle body, There is a problem that cracks are generated outside the hemming molded part.

In addition, in order to minimize the occurrence of cracks in the hemming molded part, by inserting a separate wire inside the hemming molded part can artificially reduce the curvature of the hemming molded part, but as the size of the hemming molded part is increased, the merchandise is lowered, mass production It is also difficult to apply because it is not suitable for the application method.

Therefore, the present invention has been invented to solve the problems as described above, the object of the present invention is to integrally configure the heating unit to preheat the flange portion of the outer panel in the hemming molding of the panel using the light metal As a result, the hemming molding is completed by using the hemming roller of the flange portion of the preheated outer panel, thereby providing a roller hemming device that minimizes the occurrence of cracks in the hemming molding portion.

A roller hemming device according to an embodiment of the present invention for achieving the above object is a roller hemming device mounted on the arm tip of the robot and hemming the flange portion of the outer panel with respect to the tip of the inner panel. A pressurizing unit having an upper portion connected to a front end thereof, and a hemming roller means mounted at a lower side thereof to provide a constant pressing force to the hemming roller means; And a heating unit rotatably mounted on the other side of the lower portion of the pressing unit, and preheating the flange portion before hemming molding of the flange portion through the hemming roller means, wherein the pressing unit has an upper surface at the tip of the arm of the robot. A mounting plate on which it is mounted; A housing formed in a cylindrical shape and having an upper end mounted on a lower surface of the mounting plate; A pressurized motor installed downward in the mounting plate in the housing; A pressure control block connected to an upper surface of the housing by a first screw mounted to the rotating shaft of the pressure motor, the pressure adjusting block being movable upward and downward in the housing; A main supporter having one end inserted into the lower portion of the housing; A spring interposed between the pressure control block and the main supporter; A load cell mounted between the spring and the pressure control block and measuring a pressure transmitted from the main supporter through the spring and outputting a signal to a controller; And an upper surface is fixedly mounted on the other end of the main supporter, the lower end may be made of a connection block to which the hemming roller means and the heating unit are respectively mounted.

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An auxiliary supporter may be mounted between the housing and the connection block at predetermined intervals along its circumference.

The hemming roller means and the heating unit are respectively mounted on one side of the lower end of the connection block and the other side adjacent to each other, and may be mounted in a state in which the hemming roller means and the heating unit are vertically disposed with respect to the connection block.

The hemming roller means is a mounting shaft mounted to one side of the lower end of the connection block; And a hemming roller rotatably inserted into the mounting shaft and contacted with the flange portion of the outer panel during hemming molding.

The heating unit is connected to one end is fixed to the other end of the lower end of the connection block; A rotating housing formed in a hexahedron shape having a mounting space therein, the other end of the connecting rod being inserted into one side thereof, and rotatably mounted about the connecting rod through a first driving means; And a heating member disposed at a lower surface of the rotary housing so as to be vertically movable from a lower surface of the rotary housing through a second driving means connected to a moving block and generating heat by applying current. It can consist of;

The rotating housing may have a mounting hole formed at one side to insert the connection rod, and an insertion groove may be formed at the bottom thereof to insert the moving block.

The first driving means includes a first driven gear mounted to the other end of the connecting rod in the mounting space of the rotary housing; And a first driving motor mounted to the mounting space corresponding to the first driven gear, and having a first driving gear mounted at the front end of the rotating shaft to be engaged with the first driven gear.

The second driving means includes a second screw one end is connected to the upper surface of the moving block; A second driven gear mounted to the other end of the second screw in the mounting space; And a second driving motor mounted to the mounting space corresponding to the second driven gear, and having a second driving gear mounted at the front end of the rotating shaft to be engaged with the second driven gear.

The heating member is formed in a disk shape, the upper surface is connected to the moving block, the lower body body portion is formed in the groove; A coil unit mounted to the groove and electrically connected to the robot and generating heat according to the presence or absence of electric force; A plurality of mounted at a predetermined interval along the outer circumference of the body portion, the position sensor connected to the controller; may be made.

According to the roller hemming device according to the present invention as described above, the flange portion of the preheated outer panel by integrally configuring the heating unit to preheat the flange portion of the outer panel during the hemming molding of the panel using the light metal By completing the hemming molding using the hemming roller, the workability is improved, and there is an effect of minimizing the occurrence of cracks in the hemming molded part.

In addition, when the hemming molding operation through the pressing unit, by completing the hemming molding while maintaining a constant pressing force on the hemming roller, the flange portion of the outer panel is hemmed evenly with respect to the inner panel, thereby improving the merchandise.

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

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that various equivalents and modifications may be present.

Figure 2 is a perspective view of a roller hemming device according to an embodiment of the present invention, Figure 3 is a cross-sectional view taken along the line AA of Figure 2, showing the configuration of the pressure unit in the embodiment of the present invention, Figure 4 is the present invention Figure 5 is a step-by-step operating state diagram of the pressurizing unit according to the embodiment, Figure 5 is a cross-sectional view taken along the line BB of Figure 2, a cross-sectional view showing the configuration of a heating unit according to an embodiment of the present invention.

The roller hemming device 1 according to the exemplary embodiment of the present invention integrates the heating unit 40 so as to preheat the flange portion F of the outer panel 5 in advance when forming the hemming of the panel in which the light metal is used. In this configuration, as the flange portion F of the preheated outer panel 5 completes the hemming molding using the hemming roller 33, the occurrence of cracking is minimized in the hemming molding portion.

To this end, the roller hemming device 1 according to the embodiment of the present invention is basically mounted to the tip of the arm 3 of the robot, as shown in FIG. The pressurizing unit 10 and the heating unit 40 are largely composed to hemming the flange portion F of 5).

In this embodiment, the pressing unit 10 is connected to the upper end of the arm (3) of the robot, hemming roller means 30 is mounted on the lower one side to provide a constant pressing force to the hemming roller means (30). Done.

As shown in FIG. 3, the pressure unit 10 is basically a mounting plate 11, a housing 13, a pressure motor 15, a pressure control block 17, a main supporter 19, and a spring ( 21), the load cell 23, and the connection block 25.

First, the mounting plate 11 is mounted on the top end of the arm (3) of the robot (not shown).

An upper end of the housing 13 is mounted on a lower surface of the mounting plate 11, and the housing 13 is formed in a cylindrical shape.

The pressurized motor 15 is installed downward in the mounting plate 11 in the housing 13, and the first screw 14 is mounted on the rotating shaft.

In this embodiment, the pressure control block 15 is connected to the upper surface through the first screw 14 is mounted so as to move up, down in the interior of the housing (13).

Here, the pressurized motor 15 is preferably made of a servo motor capable of adjusting the rotation direction and the rotation angle of the rotary shaft according to the control signal of the controller 9, and the first screw 14 clockwise or clockwise By rotating in the opposite direction, the pressure adjusting block 17 is moved up and down.

Meanwhile, one end of the main supporter 19 is slidably inserted into the main supporter 19 from the bottom of the housing 13.

Here, the housing 13 has a locking jaw 16 is formed along the periphery of the inner peripheral surface on one side of the lower end, and the main supporter 19 is caught by the upper end of the locking jaw 16 so as not to be separated from the housing 13. A locking protrusion 20 is formed along the outer circumferential surface of one side of the upper end.

The spring 21 is interposed between the main supporter 19 and the pressure control block 17.

The load cell 23 is mounted on the bottom surface of the pressure adjusting block 17 between the spring 21 and the pressure adjusting block 17.

The load cell 23 measures the pressure transmitted from the main supporter 19 through the spring 21 and outputs the measurement signal to the controller 9.

The load cell 23 is a generic term for a force transducer in which an electrical output is generated in proportion to its size when a load is applied, and is a semiconductor device used to measure the weight or pressure applied to the load cell 23.

Since the load cell 23 is made of a load measuring device of a known technique widely used in the art, more detailed description of the configuration will be omitted herein.

That is, the controller 9 receives the measurement signal from the load cell 23 received the pressure of the main supporter 19 through the spring 21 so that the pressing unit 10 maintains a constant pressing force. The pressurized motor 15 is operated.

Then, the rotational force of the pressure motor 15 is transmitted to the pressure control block 17 through the first screw 14 to move the pressure control block 17 up and down inside the housing 13. Accordingly, the pressing force applied to the main supporter 19 through the spring 21 is kept constant.

On the other hand, the connection block 25 is the upper surface is fixedly mounted on the other end of the main supporter 19, the hemming roller means 30 and the heating unit 40 is mounted on the lower end, respectively.

Here, a plurality of auxiliary supporters 27 are mounted between the housing 13 and the connection block 25 at regular intervals along the circumference thereof.

The hemming roller means 30 and the heating unit 40 are respectively mounted on one side of the lower end of the connection block 25 and the other side adjacent to each other so as to be mounted vertically with respect to the connection block 25. It is preferable.

In the present embodiment, the hemming roller means 30 is mounted to the mounting shaft 31 mounted on one side of the lower end of the connection block 25, and rotatably inserted into the mounting shaft 31, when hemming, The hemming roller 33 which contacts the flange part F of the outer panel 5 is comprised.

The hemming roller means 30 hamming the flange portion F of the outer panel 5 with respect to the inner panel 7 by a robot (not shown), and receives a constant pressing force from the pressing means 10. The flange portion F is evenly hemmed.

Looking at the operation of the pressure unit 10 configured as described above, first, as shown in (S1) of Figure 4, the hemming roller 33 of the hemming roller means 30 is in contact with the flange portion (F) the plan The branch part F is formed by hemming.

While the hemming molding of the flange portion F proceeds in this state, and as shown in FIG. 4 (S2), when the deformation of the flange portion F occurs, the connection block 25 is formed by the hemming roller 33. ) Is raised and at the same time, the main supporter 19 and the auxiliary supporter 27 are also raised to the housing 13 side.

Accordingly, the distance between the housing 13 and the connecting block 25 is narrowed by changing from D1 to D2.

Then, the spring 21 is compressed by the main supporter 19, and the spring 21 transmits the pressing force transmitted from the main supporter 19 to the load cell 23.

The load cell 23 measures the pressing force of the main supporter 19 transmitted through the spring 21 and outputs the measurement signal to the controller 9. The controller 9 outputs the load cell ( The pressure motor 15 is driven by the measurement signal of 23 to rotate the first screw 14 clockwise.

Then, the pressure control block 17 is moved upward from the inside of the housing 13, as shown in (S3) of Figure 4, the length of the first screw 14 is shortened from L1 to L2, As a result, the compression of the spring 21 is released, and the state is changed to the state as shown in FIG. 4 (S1).

In this case, the pressing force applied to the hemming roller 33 through the main supporter 19 is maintained the same as before the deformation of the flange portion F occurs, thereby forming a hemming molding of the flange portion F at a constant pressing force. You can do it.

On the other hand, the heating unit 40 is rotatably mounted on the connection block 25 of the pressing unit 10 in a state perpendicular to the hemming roller means 30.

The heating unit 40 has a function of preheating the flange portion F before hemming molding of the flange portion F through the hemming roller means 30.

In the present embodiment, the heating unit 40, as shown in Figure 5, basically consists of a connecting rod 41, a rotary housing 43, and a heat generating member 45.

First, one end of the connection rod 41 is fixed to the other end of the lower end of the connection block 25.

The rotary housing 43 is mounted at the other end of the connecting rod 41.

The rotary housing 43 is formed in a hexahedral shape having a mounting space 46 therein, and the other end of the connection rod 41 is inserted into a predetermined section at one side thereof, and the connection rod (1) through the first driving means 47. 41) is rotatably mounted.

The heating member 45 is installed on the lower surface of the rotary housing 43, the heating member 45 is disposed perpendicular to the connection rod 41 on the lower surface of the rotary housing 43, the moving block ( It is mounted to be movable up and down from the lower surface of the rotary housing 43 through the second drive means 51 connected to 49.

The heat generating member 45 receives a current from the robot (not shown) to generate heat.

Here, the rotating housing 43 has a mounting hole 53 is formed on one side so that the connection rod 41 is inserted, the insertion groove 55 is formed on the lower surface so that the moving block 49 is inserted.

The mounting hole 53 has a fixing portion 57 formed along the outer circumference of the outer surface so that the other end of the connecting rod 41 is not inserted and separated, and the connecting rod 41 corresponds to the fixing portion 57. Preferably, the locking groove 59 is formed along the outer circumferential surface at the position.

In the present embodiment, the first driving means 47 is a first driven gear 61 mounted on the other end of the connecting rod 41 in the mounting space 46 of the rotary housing 43, and the first The first driving motor 65 is mounted in the mounting space 46 corresponding to the driven gear 61 and the first driving gear 63 is mounted at the front end of the rotating shaft to be engaged with the first driven gear 61. Is done.

The second driving means 51 is mounted to the second screw 67 having one end connected to an upper surface of the moving block 49 and the other end of the second screw 67 in the mounting space 46. A second drive gear 71 is mounted in the mounting space 46 in correspondence with the second driven gear 69 and the second driven gear 69, and is engaged with the second driven gear 69 at the front end of the rotating shaft. ) Is mounted to the second driving motor 73.

The first and second drive motors 65 and 73 are preferably made of a servo motor capable of adjusting the rotation direction and the rotation angle of the rotation shaft by the control signal of the controller 9.

On the other hand, in the present embodiment, the heat generating member 45 is composed of a body portion 75, a coil portion 77, and a position sensor 79.

First, the body portion 75 is formed in a disk shape, the upper surface is connected to the moving block 49, the groove 76 is formed on the lower surface.

The coil portion 77 is mounted on the body portion 75 through the groove 76 to be electrically connected to the robot (not shown), and to generate heat depending on the presence or absence of electric force.

In addition, a plurality of position sensors 79 are mounted at predetermined intervals along the outer circumferential surface of the body portion 75, and connected to the controller 9 to determine a distance from the flange portion F of the outer panel 5. The signal is measured and output to the controller 9.

Here, the controller 9 rotates the first and second drive motors 65 and 73 in the forward or reverse directions, respectively, by comparing the signals output from the position sensors 79 with a preset value. Accordingly, the heat generating member 45 maintains a predetermined interval and a predetermined angle with the flange portion (F).

Hereinafter, the operation and action of the roller hemming device according to an embodiment of the present invention configured as described above will be described in detail.

6 is a step-by-step operating state diagram of the roller hemming device according to an embodiment of the present invention.

First, the heating unit 40, as shown in (S10) of Figure 6, to heat the flange portion (F) of the outer panel 5 to be hemming molded through the heat generating member 45, in this case The coil portion 77 maintains a predetermined distance from the flange portion F through the position sensors 79.

Thereafter, the hemming roller 33 of the hemming roller means 30 is contacted with the flange portion F preheated through the heating unit 40 by the robot, which is not shown. The flange portion F is hemmed.

When the primary hemming molding of the flange portion F is completed, the heating unit 40 is hemmed at a primary set angle through the first driving means 47, as shown in FIG. 6 (S20). The flange portion (F) is rotated about the connection rod 41 to match the angle to heat the flange portion (F) again.

 Thereafter, the hemming roller 33 performs the second hemming molding so that the flange portion F preheated through the heating unit 40 is angled at 90 ° with respect to the inner panel 7. .

When the secondary hemming molding of the flange portion (F) is completed, the heating unit 40, as shown in (S30) of Figure 6, again to match the angle of the flange portion (F) the first drive means ( 47 is rotated about the connecting rod 41, and in this state the hemming roller 33 is hemming the flange portion (F) at the third set angle by the robot again.

When the tertiary hemming molding of the flange portion F is completed, the heating unit 40, as shown in (S40) of Figure 6, the third hemming molded to match the angle of the flange portion (F) 1 through the drive means 47 is rotated about the connecting rod 41, in this state the hemming roller 33 is the outer panel (5) with respect to the inner panel (7) by the robot (not shown) Hemming molding is completed by pressing the flange portion F of

Here, the heating unit 40 is rotated to correspond to the set angle through the first drive means 47 corresponding to the flange portion (F) which is hemmed at a set angle through the respective position sensors (79) In addition, the second driving means 51 maintains a constant distance from the flange portion (F).

That is, the heating unit 40 preheats the flange portion F of the outer panel 5 through the heating unit 40 in advance, thereby increasing the ductility of the flange portion F, and the pressing unit. 10 provides a constant pressing force to the hemming roller 33 of the hemming roller means 30.

Therefore, when the roller hemming device 1 according to the embodiment of the present invention configured as described above is applied, the flange portion F of the outer panel 5 is formed during hemming of the panel in which the lightweight metal is used. By integrally configuring the heating unit 40 to preheat, the workability is improved as the flange portion F of the preheated outer panel 5 is finished using the hemming roller 33 to complete the hemming molding. Minimization of cracking in the molded part.

In addition, during the hemming molding operation through the pressure unit 10, the hemming molding is completed while maintaining a constant pressing force on the hemming roller 33, whereby the flange portion F of the outer panel 5 is the inner panel 7. Hemming molded evenly with respect to) improves the marketability.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this and is given by the person of ordinary skill in the art to the following, Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a block diagram of a roller hemming device according to the prior art.

2 is a perspective view of a roller hemming device according to an embodiment of the present invention.

3 is a cross-sectional view taken along the line A-A of Figure 2, showing the configuration of the pressing unit in the embodiment of the present invention.

4 is a step-by-step operating state diagram of the pressurizing unit according to the embodiment of the present invention.

5 is a cross-sectional view taken along the line B-B of Figure 2, a cross-sectional view showing the configuration of a heating unit according to an embodiment of the present invention.

6 is a step-by-step operating state diagram of the roller hemming device according to an embodiment of the present invention.

Claims (10)

In the roller hemming device mounted on the arm tip of the robot, hemming the flange portion of the outer panel with respect to the tip of the inner panel, A pressurizing unit having an upper portion connected to an arm tip of the robot and having a hemming roller means mounted at a lower side thereof to provide a constant pressing force to the hemming roller means; And A heating unit rotatably mounted on the other side of the lower side of the pressurizing unit, and preheating the flange portion before hemming molding of the flange portion through the hemming roller means, The pressurizing unit A mounting plate having an upper surface mounted on an arm tip of the robot; A housing formed in a cylindrical shape and having an upper end mounted on a lower surface of the mounting plate; A pressurized motor installed downward in the mounting plate in the housing; A pressure control block connected to an upper surface of the housing by a first screw mounted to the rotating shaft of the pressure motor, the pressure adjusting block being movable upward and downward in the housing; A main supporter having one end inserted into the lower portion of the housing; A spring interposed between the pressure control block and the main supporter; A load cell mounted between the spring and the pressure control block and measuring a pressure transmitted from the main supporter through the spring and outputting a signal to a controller; And The upper surface is fixedly mounted on the other end of the main supporter, the lower end portion of the roller hemming device, characterized in that consisting of the connecting block to which the hemming roller means and the heating unit is mounted. delete The method of claim 1, Roller hemming device, characterized in that the auxiliary supporter is mounted between the housing and the connecting block at a predetermined interval along the circumference. The method of claim 1, And the hemming roller means and the heating unit are mounted on one side of the lower end of the connection block and the other side adjacent to each other, and are mounted in a state in which the hemming roller means and the heating unit are arranged vertically with respect to the connection block. The method of claim 1, The hemming roller means A mounting shaft mounted at one side of the lower end of the connection block; And And a hemming roller rotatably inserted into the mounting shaft, the hemming roller being in contact with the flange portion of the outer panel during hemming molding. The method of claim 1, The heating unit A connecting rod having one end fixed to the other end of the lower end of the connecting block; A rotating housing formed in a hexahedron shape having a mounting space therein, the other end of the connecting rod being inserted into one side thereof, and rotatably mounted about the connecting rod through a first driving means; And A heat generating member disposed vertically on the lower surface of the rotary housing and movable up and down from the lower surface of the rotary housing through a second driving means connected to a moving block and generating heat by applying current; Roller hemming device, characterized in that consisting of. The method of claim 6, The rotating housing is a roller hemming device, characterized in that the mounting hole is formed on one side so that the connecting rod is inserted, the insertion groove is formed on the lower surface to insert the moving block. The method of claim 6, The first driving means A first driven gear mounted to the other end of the connecting rod in a mounting space of the rotary housing; And And a first drive motor mounted to the mounting space corresponding to the first driven gear, and having a first drive gear mounted at the distal end of the rotating shaft to be engaged with the first driven gear. The method of claim 6, The second driving means A second screw having one end connected to an upper surface of the moving block; A second driven gear mounted to the other end of the second screw in the mounting space; And And a second drive motor mounted to the mounting space corresponding to the second driven gear, and having a second drive gear mounted at the front end of the rotating shaft to be engaged with the second driven gear. The method of claim 6, The heating member A body portion formed in a disc shape and having an upper surface connected to the moving block and having a groove formed on the lower surface; A coil unit mounted to the groove and electrically connected to the robot and generating heat according to the presence or absence of electric force; Roller hemming device comprising a plurality of position sensors are mounted at a predetermined interval along the outer circumference of the body portion, the position sensor is connected to the controller.

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