KR101634159B1 - Welding jig working system and semi-automatic welding system using the same - Google Patents

Abstract

Disclosed is a welding jig operation system which can improve precision since a worker can work continuously on the spot without location movement and a welding robot can perform welding at one welding position without a large swing from side to side, and can reduce manufacturing costs since multiple jigs can use an equal transfer unit, and enables the worker to increase the work position and the number of welding robots easily. The welding jig operation system includes: a rotation table which is installed to rotate around a center rotary shaft on the spot; the multiple welding jigs which are installed on the rotation table in intervals, and hold components for welding; an index rotation device comprising an intermittent rotation unit to rotate the rotary shaft intermittently in a fixed time interval by receiving power of an index gear motor through the index gear motor and a power delivery unit; and a support frame which provides an installation place of the index rotation device and supports the index rotation device.

Description

TECHNICAL FIELD [0001] The present invention relates to a welding jig operating system and a semi-automatic welding system using the same,

The present invention relates to improvements in welding systems, and more particularly to improvements in welding jig operating systems and semi-automatic welding systems using the same.

Various shapes of bracket assemblies are used in automobiles. It is necessary to weld two or more parts that are complicated in shape or difficult to integrate into one piece. Particularly, spot welding is widely used to manufacture various types of bracket assemblies which are widely used in the intake and exhaust systems of an automobile engine.

The related art will be described with reference to FIGS. 1 and 2. FIG.

1 is a perspective view of a welding system for explaining a conventional welding method.

Conventionally, a pair of rails 20 are provided in front of the welding robot 10 and left and right rails 20 are mounted on movable rails 30 provided with jigs 32 on the respective rails 20 so as to be attached to parts such as various bracket assemblies The welding operation is performed. The welding robot 10 turns the welding head toward the moving base 30 moved forward and then moves the moving base 30 to the moving base 30, The welding of the parts mounted on the jig 32 is performed.

At this time, the other movable base 30 is stopped in front of the worker 40, and the worker 40 releases the welded bracket assembly from the jig 32 while the welding robot 10 is welding A bracket for new welding, and the like are mounted on the jig 32.

After the welding robot 10 completes the welding operation, the movable table 30 is retracted toward the operator, and the movable table 30 in front of the operator advances toward the welding robot 10. The welding robot 10 turns the welding head toward the newly arrived moving table 30 and welds the parts mounted on the jig 32 on the moving table 30. [

Since the two moving tables 30 for providing the brackets for welding the welding robot 10 alternately between the welding robot 10 and the worker 40 are installed at left and right intervals, The worker 40 is required to separate the welded bracket assembly and the like from the jig 32 while moving the worker 40 back and forth so that the parts such as the bracket to be welded are mounted on the jig 32 You must do the work.

That is, in the conventional method, since the welding is performed at two different welding positions, the welding robot 10 moves the welding head a lot, thereby reducing the precision of the welding operation and causing a lot of errors. Also, since the mobile unit for moving the movable stand 30 and the movable stand 30 forward and backward is complicated and requires a pair of left and right, the installation cost is large and the space is also large.

In addition, since the worker must work while moving to the left and right, the work efficiency is lowered.

2 is a side view showing another example of a conventional welding system.

The movable table 30 on which the jig 32 is mounted is mounted on the support table 36 by the welding robot 10 using the cylinder mechanism 34 ). However, the work efficiency and accuracy of welding are also inferior, and the apparatus for moving the movable table 30 must be separately provided.

In addition to the above, there is a prior art disclosed in the registered patent publication of Registration No. 10-0552613 (the name of the invention: a device for inserting a panel part for a spot welding robotic system, inventor: Park, Ki-Cheol) Have.

An object of the present invention is to provide a welding jig operating system that enables an operator to work without moving left and right, and a semi-automatic welding system using the same.

Another object of the present invention is to provide a welding jig operating system having high welding precision because the welding position is defined as one place, and a semi-automatic welding system using the same.

It is a further object of the present invention to provide a welding jig operating system capable of increasing or decreasing the number of jigs and the number of welding robots according to the type of work without requiring a pair of transfer devices for moving the jigs, .

It is still another object of the present invention to provide a welding jig operating system which can position a jig in an accurate welding position and has excellent stability, and a semi-automatic welding system using the same.

It is still another object of the present invention to provide a welding jig operating system capable of using a plurality of welding robots as a single system and a semi-automatic welding system using the same.

A welding jig operating system according to the present invention comprises a rotary table installed to be rotatable about a central axis of rotation; A plurality of welding jigs provided at intervals on the rotary table to hold parts for welding; And an intermittent rotating means for intermittently rotating the rotary shaft at predetermined time intervals by receiving the power of the index gear motor through the index gear motor and the power transmitting means. And a support frame for supporting the index rotating device, wherein the rotary table is intermittently rotated by the rotating shaft, and the plurality of welding jigs provided on the rotating table are rotated one by one The welding robot alternately transfers the welding robot to a welding position capable of performing a welding operation on the parts mounted on the jig.

Position detecting means for detecting that the welding jig is out of a predetermined position on at least one or two or more of the supporting frame, the index rotating device, and the rotating shaft; And the driving unit of the index gear motor stops driving the index gear motor when the non-position determining unit receives the non-position determining signal from the non-position determining unit.

Wherein the non-position determining means comprises: a welding position confirming plate fixed to the outer circumferential surface of the rotating shaft and rotated together with the rotating shaft and having a plurality of grooves or holes formed at predetermined angular intervals along an edge thereof; And a photosensing device for confirming whether or not the welding position confirming plate is in a correct position through a light emitting portion and a light receiving portion disposed above and below the groove or hole of the welding position confirming plate.

The apparatus according to claim 1, further comprising a fixed auxiliary means for preventing shaking of the rotary table when the rotary table is stopped, wherein the fixed auxiliary means is fixed to the outer surface of the rotary shaft or the bottom surface of the rotary table, And a cylinder mechanism having a rotary table stage gear and a rod which is provided in the support frame or the index rotating device and has an end inserted into the concave groove to hold the rotary table stage gear so as not to move.

And the rod end portion is formed to correspond to a part of the inner portion of the concave groove so that the rod end portion enters the concave groove, It is preferable to finely adjust the position of the lens.

The jig includes a mounting table for mounting and supporting components to be welded, a pressing means for pressing or gripping the component mounted on the mounting table toward the mounting table, and a pressing means for pushing or pulling one side of the pressing means, And a cylinder mechanism for fixing or releasing the components.

Further comprising a fixed auxiliary means for preventing the rotation of the rotary table when the rotary table is stopped, wherein the fixed auxiliary means is connected to the non-predetermined position determining means and the fixed position signal is applied from the non- It is possible to operate for a predetermined time to prevent the rotation of the rotary table.

A welding system according to the present invention comprises: a welding robot; And a welding jig operating system according to any one of claims 1 to 6 provided in front of the welding robot.

The welding robot may be a spot welding robot.

According to the present invention, an operator can continuously perform the work of fixing the parts to be welded to the welding jig after moving the parts that have been welded from the jig, without moving the position, so that the work efficiency is excellent.

In addition, according to the present invention, the welding robot can be welded only at one welding position without swinging left and right, so that the welding robot is excellent in accuracy of welding and a semi-automatic welding system can be constructed using a relatively inexpensive welding robot.

In addition, according to the present invention, the configuration for moving the welding jig is not complicated, and a plurality of jigs can use the same transporting means, thereby reducing the manufacturing cost.

In addition, according to the present invention, it is possible to easily increase the number of welding robots and the position of the worker in one welding jig operating system without increasing the number of welding jig operating systems.

Further, according to the present invention, the ability to cope with the occurrence of an error is excellent, and the jig can be stably positioned at an accurate welding position, so that a good welding result can be obtained.

1 is a perspective view of a welding system for explaining a conventional spot welding method,
2 is a side view showing another example of a conventional welding system;
3 is a plan view for explaining a welding system according to the present invention,
4 is a side view of a welding jig operating system according to the present invention,
5 is a plan view of the welding position confirmation plate,
6 is a plan view of the rotary table stage gear,
7 is a block diagram for explaining a configuration of a welding jig operating system according to the present invention,
8 is a flowchart showing an operation process of the welding system with reference to the first welding jig,
FIG. 9 is a flowchart showing an operation procedure of the welding system based on the second welding jig.

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

FIG. 3 is a plan view for explaining a welding system according to the present invention, FIG. 4 is a side view of a welding jig operating system according to the present invention, FIG. 5 is a plan view of a welding position confirmation plate, Fig. 7 is a block diagram for explaining a configuration of a welding jig operating system according to the present invention. Fig.

3 to 7, the welding system 200 according to the present invention is equipped with a welding robot 210 and a welding jig operating system 100.

As the welding robot 210, a spot welding robot is mainly used. By using the welding jig operating system 100 according to the present invention, which will be described later, the welding robot 210 can perform the welding operation with only the minimum movement required for the welding operation, And the welding efficiency is excellent. In addition, since it is not necessary to swing the welding head as much as to the left and right, a relatively inexpensive welding robot 210 can be used.

The welding jig operating system 100 according to the present invention includes a plurality of welding jigs provided in the rotary table 110 while intermittently rotating the rotary table 110. In this embodiment, the first and second welding jigs 120a and 120b, For precisely transferring the welding robot 210 to the welding position capable of performing the welding operation on the welding parts P such as the brackets mounted on the first and second welding jigs 120a and 120b alternately one by one will be.

A welding jig operating system 100 according to the present invention includes a rotary table 110. The rotary table 110 is installed so as to be rotatable about the rotation axis S of the center. On the rotary table 110, first and second welding jigs 120a and 120b are provided with an interval therebetween. The first and second welding jigs 120a and 120b serve to hold welding parts P for welding. In this embodiment, two jigs are provided at intervals of 180 degrees .

Referring to FIG. 4, the first and second welding jigs 120a and 120b include a mounting table 121 for mounting and supporting a welding component P to be welded, a welding component P For pushing or holding the welding component P toward or away from the mounting table 121 by pushing or pulling one side of the pressing member 123 and the pressing member 123 to fix or unlock the welding component P . The operation of the cylinder mechanism 125 is controlled by the operator in such a manner that the operator directly operates the jig reaching the front of the robot (W), and is automatically released from the specific rotation angle via the switch or sensor, .

The welding jig operating system 100 according to the present invention is equipped with an index rotating device 130. The index rotating device 130 is for intermittently rotating the rotating shaft S fixed at the center of the rotating table 110 at predetermined time intervals and includes an index gear motor 131 for providing rotational power, And intermittent rotating means 133 for intermittently rotating the rotary shaft S by receiving the power of the index gear motor 131 through the power transmitting means 132.

The index gear motor 131 decelerates the driving speed of the motor and outputs speed reduction gears for decelerating the rotation speed. It is desirable that the power transmitting means 132 be provided with a clutch so as to be able to interrupt the power transmission if necessary.

The intermittent rotating means 133 receives the reduced rotational power through the power transmitting means 132 and converts the power transmitting direction through 90 degrees from horizontal to vertical through a bevel gear or the like, (S) is rotated at a predetermined angle (180 degrees in this embodiment) for a certain period of time and then rotated 180 degrees. The index rotating device 130 that performs the above-described operation can easily assemble the accessories sold in the market to a person skilled in the art. And those which are assembled together and sold in the market may be used.

The welding jig operating system 100 according to the present invention is provided with a support frame 140 that provides a place for installing the index rotating device 130 and supports the index rotating device 130. [

The welding jig operating system 100 according to the present invention includes the non-position determining means 150. This undetermined position checking means 150 is for checking that the first and second welding jigs 120a and 120b are out of position. In this embodiment, the non-position determining means 150 is installed to be shared with the index rotating device 130 and the rotating shaft S.

In this embodiment, the non-position determining means 150 is shown in Figs. 4 and 5 (see Figs. 5 and 5) in which a plurality of grooves 152 or holes are formed along the periphery of the rotating shaft S, Through the light emitting portion and the light receiving portion which are supported by the welding position confirmation plate 151 and the index rotating device 130 as shown in FIG. 6A and arranged above and below the groove or hole of the welding position confirmation plate 151, ) Or the second welding jig 120b has moved to the welding position precisely. The undetermined position determining means 150 preferably generates a positive position signal when the first and second welding jigs 120a and 120b are in a correct position and generates a non-position signal when the first and second welding jigs 120a and 120b are not a positive position, Send it to where you need it.

In this embodiment, the welding position confirmation plate 151 is fixed to the rotation axis S, but may be fixed to the rotation table 110 at any time. A plurality of holes or the like may be formed at intervals of a predetermined angle in a portion extending downward from the rotary table 110. [ The photosensing device 153 may also be installed in the support frame 140 rather than in the indexing device 130.

The welding jig operating system 100 according to the present invention is provided with an alarm means 160. The alarm means 160 is adapted to issue an alarm signal when an abnormal positioning signal is received from the abnormal position confirmation means 150 so that an operator or a person in charge can check the state of the welding jig and modify the position of the welding jig. The alarm means 160 also applies an error signal to the driving unit of the index gear motor 131 to stop the driving of the index gear motor 131.

Preferably, the welding jig operating system 100 according to the present invention further includes fixing auxiliary means 170 for preventing the rotation of the rotary table 110 when the rotary table 110 is stopped. The fixed auxiliary means 170 is fixed to the bottom surface of the rotary table 110 via the bolts B as shown in the outer circumferential surface of the rotary shaft S or as shown in Fig. 4 and is provided with concave grooves 172 And a rod 174 which is provided on the index rotating device 130 and has an end inserted into the concave groove 172 to hold the rotary table stage gear 171 so as not to move, And a mechanism 175. In some cases, the cylinder mechanism 175 may be provided with a support frame on the support frame 140. For a more solid support, the cylinder mechanism 175 may be provided on the opposite side. In some cases, the fixed auxiliary means 170 may be configured to be connected to the non-position determining means 150 so as to be activated when a positive position signal is applied thereto.

Referring to FIG. 6, the concave groove 172 is formed to be gradually narrowed from the outside to the inside, and is laterally symmetrical. The end of the rod 174 corresponding to the end of the rod 174 has a shape corresponding to a part of the inner portion of the recessed groove 172 so that the position of the rotary table 110 becomes more accurate as the end of the rod 174 enters the recessed groove 172 There is also an advantage of fine adjustment to the position.

In the case of using the rotary table 110 as described above, two welding robots 210 are arranged adjacent to each other at intervals of 90 degrees, and the first and second welding jigs 120a and 120b are arranged at intervals of 90 degrees and four Two welding robots 210 can be installed in one welding jig operating system 100 or in one welding system 200 if the worker W is provided at two places at intervals of 90 degrees Welding can be performed. At this time, the worker can be placed one person or two persons.

8 is a flowchart showing the operation of the welding system with reference to the first welding jig.

First, the worker mounts a part P to be welded to the first welding jig 120a (S1). When the mounting of the part P is completed, the cylinder mechanism 125 corresponding to the operation means of the first welding jig 120a is operated to fix the part to be welded to the first welding jig 120a (S2). The index gear motor 131 is driven to operate the index rotating device 130 to rotate the rotating table 110 by 180 degrees (S3). Preferably, after the execution of step S3, the fixed auxiliary means 170 is actuated to stably fix the rotary shaft S and the rotary table 100.

The non-position determining means 150 determines whether the first welding jig 120a is out of the welding position, that is, whether the first welding jig 120a is in a non-position (S4).

If it is determined that the position is not the predetermined position, the related signal is applied to the driving unit of the alarm unit 160 and the index gear motor 131 (S5). Accordingly, the alarm means 160 issues an alarm signal, and the driving portion of the index gear motor 131 stops driving the index gear motor 131. [ Sometimes, a method of shutting off power transmission by operating the clutch may be used (S6). An operator or the like rotates the rotary table 110 or the like to correct the position of the first welding jig 120a to the correct position. Of course, when the position of the first welding jig 120a is modified, the position of the second welding jig 120b is also modified (S7). Thereafter, the process returns to step S4. However, these steps S6 and S7 hardly occur.

If not, the welding robot 210 performs the welding according to the programmed state (S8). After a predetermined time has elapsed, the fixed auxiliary means 170 is operated to release support to the rotary shaft (S) and the rotary table (100). The rotary shaft S, which has stopped rotating for a predetermined time, is rotated 180 degrees again by the index rotating device 130, and the rotary table 110 is also rotated 180 degrees and then stopped for a predetermined time (S9). Accordingly, the worker W operates the operating means of the first welding jig 120a to separate the welded parts from the first welding jig 120a (S10). If the welding operation is to be continued (S11), the process returns to step S1, and the process ends.

FIG. 9 is a flowchart showing an operation procedure of the welding system based on the second welding jig.

The second welding jig 120b is positioned at the welding position in front of the welding robot 210 by performing step S9 in Fig. At this time, the fixed auxiliary means 170 operates. The operation of the fixed auxiliary means 170 can be automatically operated by using a switch, a position detecting sensor or the like.

The non-position determining means 150 confirms whether the second welding jig 120b is in a non-position or not (S21). Here, the non-position determining means 150 does not recognize whether the first welding jig 120a or the second welding jig 120b is present at the welding position, To confirm. That is, the non-position determining means 150 serves to check whether the rotation axis S or the rotation table 110 rotates at an accurate angle.

If it is determined that the position is not the predetermined position, the related signal is applied to the driving unit of the alarm means 160 and the index gear motor 131 (S22). Accordingly, the alarm unit 160 issues an alarm signal, and the driving unit stops driving the index gear motor 131 (S23). An operator or the like rotates the rotary table 110 or the like to correct the position of the first welding jig 120a to the correct position. Of course, when the position of the first welding jig 120a is modified, the position of the second welding jig 120b is also modified (S24). Thereafter, the process returns to step S21. Here, steps S23 and S24 hardly occur.

If not, the welding robot 210 performs welding on the part P mounted on the second welding jig 120b as programmed (S25). The support by the post-welding assistant means 170 is released and the rotary shaft S for which rotation for a predetermined period of time is stopped is again rotated 180 degrees by the index rotary device 130 and the rotary table 110 is rotated 180 degrees And then stops for a predetermined time (S26). Simultaneously with the stopping, the fixed auxiliary means 170 operates. Here, step S26 corresponds to step S3 in Fig.

Thus, the worker W operates the cylinder mechanism 125, which is the operating means of the second welding jig 120b, to separate the welded parts from the second welding jig 120b (S27). If the welding operation is to be continued (S28), the process of FIG. 8 is performed on the second welding jig 120b (S29), and the process ends.

The present invention is likely to be used to construct a semi-automatic welding system that semi-automatically welds the bracket assembly components used in automobiles.

100: welding jig operating system 110: rotary table
120a: first welding jig 120b: second welding jig
130: Index rotating device 131: Index gear motor
132: Power transmission means 133: Intermittent rotation means
140: support frame 150: non-stationary position checking means
151: welding position confirmation plate 160: alarm means
170: fixed auxiliary means 171: rotary table stage gear
172: concave groove 175: cylinder mechanism
200: welding system 210: welding robot
S: Rotation axis W: Worker

Claims (9)

A rotary table provided so as to be rotatable about its central axis; A plurality of welding jigs provided at intervals on the rotary table to hold parts for welding; And an intermittent rotating means for intermittently rotating the rotary shaft at predetermined time intervals by receiving the power of the index gear motor through the index gear motor and the power transmitting means. And a support frame for supporting the index rotating device and providing a place for installing the index rotating device,
The rotary table is intermittently rotated by the rotation shaft and the plurality of welding jigs provided on the rotary table are alternately rotated one by one to a welding position in which the welding robot can perform a welding operation on the parts mounted on the welding jig In the welding jig operating system for transferring,
Position detecting means for detecting that the welding jig is out of a predetermined position on at least one or two or more of the supporting frame, the index rotating device, and the rotating shaft; And the driving unit of the index gear motor stops driving the index gear motor when receiving the non-position determining signal from the non-position determining means,
Wherein the non-position determining means comprises: a welding position determining plate fixed to the outer circumferential surface of the rotating shaft and rotated together with the rotating shaft and having a plurality of grooves or holes formed at predetermined angular intervals along an edge thereof; And a photosensor for confirming whether or not the welding position confirming plate is in a correct position through a light emitting portion and a light receiving portion disposed above and below the groove or hole of the welding position confirming plate,
Further comprising fixing auxiliary means for preventing the rotation of the rotary table when the rotary table is stopped,
Wherein the fixed auxiliary means comprises a rotary table stage gear which is fixed to the outer circumferential surface of the rotary shaft or the bottom surface of the rotary table and has concave grooves formed along the outer circumferential surface thereof and a rotary table stage gear fixed to the support frame or the index rotary device, And a cylinder mechanism having a rod for holding the rotary table stage gear so as not to move,
Wherein the fixed auxiliary means is connected to the non-position detecting means and is operated for a predetermined time when the correct position signal is applied from the non-position detecting means to prevent the rotation of the rotating table. delete delete delete delete delete delete Welding robots; And
And a welding jig operating system according to claim 1, which is installed in front of the welding robot. The semi-automatic welding system according to claim 8, wherein the welding robot is a spot welding robot.

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