WO2011037418A2

WO2011037418A2 - Welding device for automobile body

Info

Publication number: WO2011037418A2
Application number: PCT/KR2010/006516
Authority: WO
Inventors: 구준모
Original assignee: 주식회사 일지테크
Priority date: 2009-09-28
Filing date: 2010-09-24
Publication date: 2011-03-31
Also published as: KR101078619B1; WO2011037418A3; KR20100036194A

Abstract

The present invention relates to a device for welding parts of an automobile body, and comprises a plurality of welding positions; a transfer unit for transferring a work piece to a welding position; a workpiece retaining and fixating unit; a support unit for allowing rotation of the fixating unit; and a control unit for controlling the rotation of the fixating unit and moving the transfer unit; wherein the device simplifies the welding process and reduces work time and space required for installation.

Description

Welding device for automobile body

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus for a vehicle body, and more particularly, to a welding apparatus for a vehicle body, which can shorten the working time by simplifying a welding process and reduce the space required for installing the welding apparatus.

In general, industrial robots are installed in production lines that handle the processing, assembly, and finished products of parts at production sites that produce various products, and require processes such as unloading, unloading, transfer, loading, etc. For example, it is mainly applied to the ejection process or welding process of an injection molding, and a vacuum adsorption device is attached to the robot arm to pick up small components, such as a semiconductor element or an electronic circuit chip component.

1 is a schematic plan view of a typical automobile body welding line.

2 is a schematic plan view of a vehicle body welding line in which a general two-stage shuttle is formed.

Referring to FIGS. 1 and 2, in the case of a processing assembly facility of an automobile body for welding, processing, and assembling parts such as an automobile body, a machining process for welding an automobile body is performed from A01 to A11 processes using a robot. Thus, the car body parts are partially welded by each process, and the car body parts welded by each process can be processed by welding the car body in a desired form while repeating the process of transferring to the next process using a robot.

The conventional process of welding the vehicle body is made from the process A01 to A11 process by welding while transferring the vehicle body parts for each process using a robot.

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

In general, a welding device for a vehicle body performs a welding process while transferring a product to be welded by a robot in each process, which takes a long time for the parts to be transferred by the robot, and the welding time of the parts in each process is different. There is a problem that the robot is unnecessarily rested and the working time becomes long.

In addition, in order to transfer the welded automobile parts to the next process, the robot and the idle jig (IDLE JIG) must be installed in the middle part, so there is a problem of low space utilization.

Therefore, there is a need for improvement.

It is an object of the present invention to provide a welding device for a vehicle body that can simplify the welding process and reduce the space required for installing the welding device.

In order to achieve the above object, the present invention, the main body is provided with a plurality of welding positions, the transfer unit is provided to be movable in the main body to move the work object to the welding position, and the work object supplied by the transport unit The constraining part, the support part installed in the main body and the fixing part rotatably installed, and the workpiece being rotated by the fixing part according to the data set during the welding process and the welding object is completed by the conveying part. It provides a welding device for a vehicle body comprising a control unit for moving to the welding position of the.

In addition, the main body, the base plate is provided with a first guide rail so that the conveying unit is slidably installed, the vertical frame is installed on the base plate and forms a boundary between the welding position and the support is installed, and the vertical frame It is characterized in that it comprises a horizontal frame is provided in the second guide rail so that the conveying unit is slidably installed.

The transfer unit may include a support plate slidably installed on the first guide rail or the second guide rail, a support plate having a protrusion on which a work object is supported, and installed between the support plate and the support plate. The lifting cylinder is characterized in that it comprises a drive unit for sliding the support plate.

The fixing unit may include a clamp rotatably installed on the support unit, and a cylinder for rotating the clamp to restrain an object interposed between the clamps.

The support part may include a support bracket installed on the vertical frame, a follower installed on the support bracket and rotatably installed on the support bracket, and a power installed on the vertical frame to provide power for rotation of the follower. And characterized in that it comprises a moving part and a transmission unit for transmitting the driven portion by varying the rotational speed of the power provided by the moving part.

The driven unit may include a driven shaft installed with the clamp and rotatably installed on the support bracket, and a driven pulley installed on the driven shaft.

The main driving unit may include a driving motor installed on the support bracket, a main driving shaft connected to the rotation shaft of the driving motor and rotatably installed on the support bracket, a main driving pulley installed on the main driving shaft, and the main driving shaft. It characterized in that it comprises a driving belt for connecting the pulley and the transmission.

In addition, the transmission unit, a transmission shaft rotatably installed on the support bracket, a first transmission pulley connected to the transmission shaft and the main belt is connected, and is installed on the transmission shaft and the diameter of the first transmission pulley The second transfer pulley is formed differently, characterized in that it comprises a transmission belt for connecting the second transfer pulley and the driven pulley.

Welding apparatus for a vehicle body according to the present invention can reduce the number of robots for transporting the vehicle body has the advantage of reducing the space required for the welding device.

In addition, the welding device for a vehicle body according to the present invention, since the fixing portion is supported by the vehicle body during the welding process proceeds, the time required for the welding process can be reduced the amount of driving of the robot when welding a large number of parts in one body There is an advantage to reduce.

In addition, the welding device for a vehicle body according to the present invention, since the fixing portion for supporting the vehicle body is rotated when welding a large number of parts in one vehicle body is not excessively driven to approach the welding portion of the vehicle body to prevent malfunction and damage of the robot There is an advantage that can be prevented.

1 is a schematic plan view of a typical automobile body welding line.

3 is a front view of a welding apparatus for a vehicle body according to an embodiment of the present invention.

Figure 4 is a side view of a welding device for a vehicle body according to an embodiment of the present invention.

5 is a plan view of a welding device for a vehicle body according to an embodiment of the present invention.

Figure 6 is an enlarged front view extracting the main part of the welding apparatus for a vehicle body according to an embodiment of the present invention.

7 is an enlarged plan view of an extract of a main part of a welding apparatus for a vehicle body according to an embodiment of the present invention.

8 is an enlarged perspective view of an extract of a main portion of a welding apparatus for a vehicle body according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a welding device for a vehicle body according to the present invention.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom.

Therefore, the definitions of these terms should be made based on the contents throughout the specification.

3 is a front view of a welding apparatus for a vehicle body according to an embodiment of the present invention, Figure 4 is a side view of a welding apparatus for a vehicle body according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention The top view of the welding apparatus for automobile bodies.

6 is an enlarged front view of an extract of the main part of the welding apparatus for a vehicle body according to an embodiment of the present invention, Figure 7 is an enlarged by extracting the main portion of a welding apparatus for a vehicle body according to an embodiment of the present invention 8 is a plan view, and FIG. 8 is an enlarged perspective view illustrating an essential part of a welding apparatus for a vehicle body according to an embodiment of the present invention.

3 to 8, the welding apparatus for a vehicle body according to an exemplary embodiment of the present invention includes a main body 10 provided with a plurality of welding positions P10 and P20, and movably installed in the main body 10. And transfer portions 20 and 20 'for moving the workpiece to welding positions P10 and P10, a fixed portion 46 for restraining the workpiece to be supplied by the transfer portions 20 and 20', and the main body 10. And a support part 40 installed at the fixing part 46 so as to be rotatably installed, and rotating the fixing part 46 in accordance with the data set during the welding process, and transferring the workpiece to which the welding process is completed. The control part 60 which moves to next welding position P10, P20 by ") is included.

When the work object is supplied to the transfer parts 20 and 20 'by the transfer robot 70, the transfer parts 20 and 20' are moved to the welding positions P10 and P20 to supply the work object to the fixing part 46, The work object is constrained by the operation of the fixing part 46.

Subsequently, the welding robot 80 approaches the welding part of the work object and performs a welding process. When the welding process is completed on a part of the work object, the work object is rotated by the operation of the support part 40 to the other part of the work object. The welding process will proceed.

Since the work object is rotated by the operation of the support part 40 while the work object is fixed by the fixing part 46, the work object is continuously moved without moving the work object or moving the welding robot 80 to the other side of the work object. The welding process can be performed.

As described above, the welding process may be performed on a plurality of welding portions provided on one side of the workpiece while the workpiece is rotated by the operation of the support 40.

After the welding process is completed, the work object is separated from the fixing part 46 and transferred to the transport parts 20 and 20 ', and the work object is moved to the next welding position P10, by the operation of the transport parts 20 and 20'. P20).

Therefore, the welding process as described above is made to a plurality of welding sites provided on the other side of the work object.

The main body 10 is provided with a base plate 11 having a first guide rail 14 'and a base plate 11 so that the transfer parts 20 and 20' are slidably installed, and the welding positions P10 and P20. The second guide rail 14 is provided so that the vertical frame 12 and the support part 40 is installed, and the second guide rail 14 is installed on the vertical frame 12 and the conveying parts 20 and 20 'are slidably installed. A horizontal frame 13.

The base plate 11 is formed of a plate having a long rectangular shape in the left and right direction, the vertical frame 12 is installed in the vertical direction at the corner of the base plate 11, and horizontal to connect the top of the vertical frame 12 The frame 13 is installed.

Accordingly, the base plate 11, the vertical frame 12, and the horizontal frame 13 have a rectangular grid shape.

Here, since a separate vertical frame 12 is installed in the center portion of the base plate 11 to form a first welding position (P10) from one end of the base plate 11 to the center portion, from the other end of the base plate 11 To the center portion, the second welding position P20 is achieved.

Since the first guide rail 14 ′ and the second guide rail 14 extend from the first welding position P10 to the second welding position P20, the

transfer units

20 and 20 ′ may move the first guide rail 14 ′. ) And the second guide rail 14 moves the work object from the first welding position P10 to the second welding position P20.

The

transfer part

20, 20 ′ is a support plate on which the

support plates

22, 22 ′ slidably installed on the guide rails 14, 14 ′, and the protrusions 26, 26 ′ on which the work object is supported ( 28, 28 ', the lifting cylinders 29, 29' installed between the support plates 22, 22 'and the support plates 28, 28', and a drive unit for sliding the

support plates

22, 22 '. (30, 30 ').

When the driving signal is received from the controller 60, the

support plates

22 and 22 ′ slide along the guide rails 14 and 14 ′ by the operation of the driving

units

30 and 30 ′ to transfer the workpiece.

After the transfer of the workpiece is completed, the rod protrudes from the lifting cylinders 29 and 29 'and supplies the workpiece to the fixing part 46.

The transfer units 20 and 20 'include a first transfer unit 20' installed on the base plate and a second transfer unit 20 installed on the horizontal frame 13.

The second conveying unit 20 is a support plate 22 is connected to the second guide rail 14 is formed on the bottom of the horizontal frame 13, the support plate 22 and the rod of the lifting cylinder 29 protrudes downward Is installed on.

In addition, since the protrusion 26 provided on the support plate 24 of the second transfer part 20 protrudes downward, a support clamp 28 for mounting the object to the protrusion 26 is installed.

The fixing part 46 includes a clamp 46a rotatably installed on the support part 40, and a cylinder 46b for rotating the clamp 46a to restrain the work object interposed between the clamps 46a.

When the rod protrudes from the cylinder 46b, one end of the clamp 46a is pushed, so that the pair of clamps 46a are rotated to closely contact each other, thereby restraining the work object interposed between the clamps 46b.

The lifting cylinders 29, 29 'and the cylinder 46b are operated by the working fluid supplied from the hydraulic supply unit 50, and the position of the work object in the control unit 60 by the signal transmitted from the sensing unit (not shown). Determine and determine the hydraulic pressure supply unit 50 in accordance with the signal transmitted from the control unit 60.

The fixing part 46 is installed at the lower portion of the vertical frame 12 so that the pair of fixing parts 46 maintain a gap, thereby restraining both end portions of the workpiece to be supplied by the first transfer part 20 ′.

In addition, the fixing part 46 is installed on the upper part of the vertical frame 12 so that the pair of fixing parts 46 to maintain the interval to rest both ends of the workpiece to be supplied by the second conveying part 20. .

The support part 40 includes a support bracket 44 installed on the vertical frame 12, a follower 45 installed on the support bracket 44, and a fixing part 46 rotatably installed, and a vertical frame 12. ) Is installed in the main drive unit 42 for providing power for the rotation of the driven unit 45, and the transmission unit for varying the rotational speed of the power provided from the main drive unit 42 to the driven unit 45 ( 43).

The welding process proceeds while the work object is constrained by the fixing part 46, and when the welding process is completed on a part of the work object, the moving part 42 is driven in response to a signal from the control unit 60. The power generated by) rotates the driven part 45 past the transmission part 43.

The driven part 45 includes a driven shaft 45b on which a clamp 46a is installed and rotatably installed on the support bracket 44, and a driven pulley 45a provided on the driven shaft 45b.

Two pairs of clamps 46a are installed on the driven shaft 45b, and the cylinder 46b is connected to each clamp 46a, so that the driven shaft 45b rotates after the work object is constrained by the clamp 46a. When the work object is rotated about the driven shaft (45b).

The main drive part 42 includes a drive motor 41 installed on the support bracket, a main drive shaft 42a connected to the rotation shaft of the drive motor 41, and rotatably installed on the support bracket 44, and a main drive axis 42a. It includes a main pulley (42b) and a main belt (42c) for connecting the main pulley (42b) and the transmission portion (43) installed in the).

When power is applied to the drive motor 41, the main shaft 42a and the main pulley 42b are rotated, and the power of the drive motor 41 is transmitted by the main belt 42c wound around the main pulley 42b. Is delivered).

The transmission part 43 includes a transmission shaft 43a rotatably installed on the support bracket 44, a first transmission pulley 43b connected to the transmission shaft 43a and connected to the driving belt 42c, and a transmission. The transmission belt 43d, which is installed on the shaft 43a and connects the second transfer pulley 43c formed to have a diameter different from that of the first transfer pulley 43b, and the second transfer pulley 43c and the driven pulley 45a. It includes.

Since the power transmitted by the driving pulley 42b is transmitted to the first transmission pulley 43b, the transmission shaft 43a is rotated, and the second transmission pulley 43c installed on the transmission shaft 43a is rotated to transmit the belt. The power of the drive motor 41 is transmitted to the driven pulley 45a by 43d.

Since the diameter of the first transmission pulley 43b is larger than that of the second transmission pulley 43c, the rotation speed of the transmitted power is reduced.

Looking at the operation of the welding device for a vehicle body according to an embodiment of the present invention configured as described above are as follows.

When the welding process is started, the workpiece is seated on the projection 26 'of the first transfer part 20' positioned at the first welding position P10 by the transfer robot 70.

When the work object seated on the projection 26 'is sensed by the sensing unit, a signal is transmitted to the control unit 60, and the rod protrudes from the lifting cylinder 29' according to the signal transmitted from the control unit 60. The object is supplied to the fixing part 46.

When the workpiece is supplied to the second transfer unit 20 by the transfer robot 70, the support clamp 28 is applied in accordance with a signal transmitted from the controller 60 after the workpiece is placed in close contact with the protrusion 26. It works.

Therefore, the work object is interposed between the protrusion 26 and the support clamp 28 to achieve the restraint of the work object.

Thereafter, the rod protrudes from the lifting cylinder 29 and is supplied to the fixing portion 46 while the workpiece is moved downward.

When the work object is disposed between the clamps 46a of the fixing part 46, the work object is interposed between the pair of clamps 46a while the rod protrudes from the cylinder 46b according to the signal of the controller 60.

When the restraint of the workpiece is completed, the welding robot 80 approaches the workpiece and performs a welding process according to a signal transmitted from the controller 60.

When the welding process is completed on one side of the workpiece, power is applied to the drive motor 41 according to the signal of the controller 60, and the power of the drive motor 41 is driven by the main drive part 42, the transmission part 43, and the like. It is transmitted through the driven part 45 to rotate the fixing part 46.

When the work object is rotated by the rotation of the fixing part 46, the welding robot 80 again approaches the work object and the welding process is performed on the other side of the work object.

As described above, in this embodiment, when the welding process is performed on the other side of the workpiece after the welding process is performed, the arm of the welding robot 80 is not bent or rotated to restrain the workpiece. The government 46 is rotated.

Therefore, excessive force is not required for the welding robot 80, thus preventing malfunction and damage of the welding robot 80, and the welding robot 80 may skip the bending or rotating operation and thus the time required for the welding process. Is reduced.

When the welding process is completed on the other side of the workpiece, the lifting cylinders 29 and 29 'are driven in response to a signal from the control unit 60 so that the support plates 24 and 24' approach the workpiece to the fixed portion 46. The constrained work object is transferred to the

transfer parts

20, 20 ′.

When the workpiece is moved to the

transfer unit

20, 20 ′, the

support plates

22, 22 ′ slide along the guide rails 14, 14 ′ according to a signal transmitted from the controller 60, thereby welding the workpiece. The position P20 is moved.

In the workpiece to be moved to the second welding position P20, the welding process as described above is performed on the other side of the workpiece.

In this embodiment, since the workpiece is moved by the transfer units 20 and 20 'in the main body 10, a plurality of welding processes are performed, thereby reducing the number of transfer robots 70.

In addition, since a pair of transfer units 20 and 20 'are installed, the welding process can be simultaneously performed on the work objects supplied by the respective transfer units 20 and 20', thereby reducing the time required for the welding process. .

When the work object is alternately transferred by the first transfer unit 20 'and the second transfer unit 20, the transfer unit 20, 20' of any one of the first transfer unit 20 'and the second transfer unit 20 is transferred. As a result, when the workpiece is transferred, a welding process may be performed on the workpiece supplied by the other transfer units 20 and 20 '.

Therefore, it is possible to perform a continuous operation by driving one of the transport robot 70 and the welding robot 80, it is possible to reduce the time that the transport robot 70 and the welding robot 80 is stopped.

As a result, it is possible to provide a welding apparatus for a vehicle body that can simplify the welding process and reduce the space required for installing the welding apparatus.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand.

In addition, although the welding apparatus for an automobile body has been described as an example, this is merely exemplary, and the welding apparatus of the present invention may be used for a product other than the automobile body.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: main body 11: base plate

12: vertical frame 13: horizontal frame

14 ': 1st guide rail 14: 2nd guide rail

20 ': first transfer unit 20: second transfer unit

22, 22 ': Support plate 24, 24': Support plate

26, 26 ': protrusion 28: support clamp

29, 29 ': lifting cylinder 30, 30': drive part

40: support portion 41: drive motor

42: main shaft 42a: main shaft

42b: Cast pulley 42c: Cast belt

43: transmission unit 43a: transmission shaft

43b: first delivery pulley 43c: second delivery pulley

43d: transmission belt 45: driven part

45a: driven pulley 45b: driven shaft

46: fixing part 46a: clamp

46b: cylinder 50: hydraulic pressure supply

60 control unit 70 transfer robot

80: welding robot

Claims

A main body provided with a plurality of welding positions;

A transfer part installed to be movable in the main body and moving the work object to a welding position;

A fixing part for restraining a work object supplied by the transfer part;

A support part installed on the main body and the fixing part rotatably installed; And

And a control unit for rotating the fixing unit according to the data set during the welding process and moving the work object having the welding process completed to the next welding position by the transfer unit.
The method of claim 1, wherein the main body,

A base plate provided with a first guide rail such that the transfer unit is slidably installed;

A vertical frame installed on the base plate and forming a boundary between the welding positions and the support part; And

Welding device for a vehicle body characterized in that it comprises a horizontal frame is installed on the vertical frame and the second guide rail is provided so that the conveying unit is slidably installed.
The method of claim 2, wherein the transfer unit,

A support plate slidably installed on the first guide rail or the second guide rail;

A support plate having a protrusion for supporting a work object;

A lifting cylinder installed between the support plate and the support plate; And

Welding device for a vehicle body, characterized in that it comprises a drive for sliding the support plate.
The method of claim 2, wherein the fixing unit,

A clamp rotatably installed on the support; And

Welding device for a vehicle body characterized in that it comprises a cylinder for rotating the clamp to restrain the workpiece interposed between the clamp.
The method of claim 4, wherein the support portion,

A support bracket installed on the vertical frame;

A driven part installed on the support bracket and rotatably installed with the fixing part;

A main unit installed in the vertical frame and providing power for rotation of the driven unit; And

Welding device for a vehicle body characterized in that it comprises a transmission for transmitting the driven portion by varying the rotational speed of the power provided by the main drive.
The method of claim 5, wherein the follower,

A driven shaft on which the clamp is installed and rotatably installed on the support bracket; And

Welding device for a vehicle body characterized in that it comprises a driven pulley installed on the driven shaft.
The method of claim 6, wherein the main body,

A drive motor installed on the support bracket;

A main shaft connected to the rotation shaft of the drive motor and rotatably installed on the support bracket;

A main pulley installed on the main shaft; And

Welding device for a vehicle body, characterized in that it comprises a main belt for connecting the main pulley and the transmission.
The method of claim 7, wherein the delivery unit,

A transmission shaft rotatably installed on the support bracket;

A first transfer pulley connected to the transfer shaft and to which the main belt is connected;

A second transfer pulley installed on the transmission shaft and configured to have a diameter different from that of the first transfer pulley; And

Welding device for a vehicle body characterized in that it comprises a transmission belt for connecting the second transfer pulley and the driven pulley.