KR101991398B1 - Spot welding System - Google Patents

Abstract

The present invention relates to a spot welding system implemented to be capable of spot-welding multiple points of a target object concurrently, comprising: a welder welding the target object; a fixture fixating the target object during a welding work of the welder; and a controller controlling the welder and the fixture. The present invention can spot-weld multiple points of the target object concurrently to shorten welding time and increase productivity. In addition, the present invention can move a multi-joint robot arm to align two welding positions where spot welding angles are different to be capable of actively performing concurrent welding even under various welding situations.

Description

[0001] Spot welding system [0002]

TECHNICAL FIELD OF THE INVENTION [0002] The present invention relates to a spot welding system, and more particularly, to a spot welding system implemented so that a plurality of points of an object can be simultaneously spot welded.

In order to assemble the body assembly and the like in the mass production process of a vehicle, a welding process for joining a plurality of body panels by spot welding is performed.

Korean Patent No. 10-0563415 (registered on Mar. 16, 2006) discloses a high-precision micro spot welding system in which the movable electrode tip is positioned approximately on the same axis as the pressure axis, thereby enabling more accurate spot welding. According to the disclosed technique, there are provided a base having a horizontal structure in which a jig for supporting a frame and an object to be welded is placed, a driving part provided in the head part of the frame, a pressurizing shaft part extending downward toward the base and movable up and down by a driving part, At least one movable electrode tip means detachably installed at the lower end of the movable electrode tip means and pressed toward the workpiece on the base by the descent of the pressing shaft portion; Wherein the movable electrode tip means includes a tip holder having a central region through which a central axis of the pressure applying shaft passes through being electrically insulated with respect to the pressing shaft portion, And a movable electrode tip.

Korean Patent No. 10-1882974 (Registered Jul. 23, 2018) discloses a spot welding system having a common body configured to allow a movable arm to move linearly and to mount and dismount various types of arms. According to the disclosed technique, there are provided a body frame having a fixed arm mounting portion at one longitudinal end of the front portion, a rail provided in the longitudinal direction on the body frame, a slider which is seated on the rail and movable along the longitudinal direction of the body frame, A ball screw arranged in the longitudinal direction of the frame, a fixed arm detachably mounted on the fixed arm mounting portion; And a movable arm detachably mounted on the slider, wherein the slider is configured to reciprocate along the rail by a rotational force of the ball screw, the slider including: a block on which the movable arm is mounted; And a sliding base provided below the block and resting on the rail.

In the conventional technique as described above, it is necessary to separately weld one welding spot while moving with respect to one welding object. Therefore, in order to match the two welding positions where the welding time is increased and the spot welding angle is different, It is difficult to cope with various welding situations and production efficiency is inferior.

Korea Patent No. 10-0563415 Korean Patent No. 10-1882974

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a spot welding system in which a plurality of points of an object can be simultaneously spot welded.

As means for solving the above-mentioned problems, according to one aspect of the present invention, there is provided a welder for welding an object; A fixture for fixing an object during welding of the welder; And a controller for controlling the welder and the fixture.

In one embodiment, the controller includes: a power supply for supplying power necessary for the welder and the fixture; And a controller which is driven by receiving power from the power source and controls driving of the welding machine and the fixing device.

In one embodiment, the control unit includes a power conversion unit for converting power supplied from the power unit into power required for the welding machine.

In one embodiment, the welder comprises: a spot weld for spot welding an object; And a robot arm portion for forming the spot welded portion on one side and bringing the spot welded portion into contact with an object.

In one embodiment, the robot arm portion is formed as a multi-joint and is rotatable and angularly adjustable.

In one embodiment, the robot arm portion includes cylinder means for adjusting the length of the spot welded portion.

In one embodiment, the spot welded portion is characterized by having a plurality of spot means for spot welding each of a plurality of points of the object.

In one embodiment, the spot welder is characterized in that each of the spot means is connected in parallel to the power converter means so that the same power source is applied to each of the spot means.

In one embodiment, the power source conversion means simultaneously inputs the converted power source to the spot means so that the same power source is simultaneously applied to the spot means.

In one embodiment, the control unit includes: resistance detection means connected to the spot means, for detecting a resistance in the spot means; Processing means, connected to the resistance detection means, for comparing the resistance value detected by the resistance detection means with a preset reference resistance value to determine whether or not an abnormality has occurred; And output means connected to the processing means for outputting an abnormality judged by the processing means.

In one embodiment, the resistance detection means includes: a plurality of resistance detection lines, connected to the respective spot means, for detecting resistance of the spot means; And a resistance detection board connected to the resistance detection line for applying a resistance value detected by the resistance detection line to the processing means.

In one embodiment, the anchor includes: a body portion; A seating part formed on an upper surface of the body part to seat a lower portion of the object; And a fixing part formed at one side of the body part and fixing the object placed on the seat part so as not to be detached.

In one embodiment, the seat portion is characterized in that the electrode is formed such that the lower surface of the object to be seated on the inside is in contact with the seat. And when the spot means contacts the upper surface of the object, the spot means is energized with the seat portion through the object and spot-welded.

In one embodiment, the fixing portion includes: pivotable fixing means formed rotatably on one side of the main body portion, for pressing and fixing or releasing the upper surface of the object; A cylindrical fixing means formed on the other side of the body portion for pressing and fixing or releasing one side of the object placed on the seat portion; And an elevating means for supporting the lower surface of the object and raising the object to be processed and releasing the object from the receiving portion.

In one embodiment, the object is a pipe formed in a tubular shape in which the front end side, the intermediate side and the rear end side are not parallel to each other or a side of the pipe, and a plurality of the pipes are connected to each other, Lt; / RTI >

According to the effects of the present invention, it is possible to spot-weld a plurality of points of an object at the same time, thereby shortening the welding time and increasing the productivity. In addition, since the articulated robot arm is moved in order to align the two welding positions at different angles of spot welding, it is possible to provide a system capable of actively welding simultaneously to various welding situations, thereby improving the welding efficiency and improving the welding quality And mass production is possible.

1 is a view for explaining a spot welding system according to an embodiment of the present invention.
Fig. 2 is a view for explaining the welding machine shown in Fig. 1. Fig.
Fig. 3 is a view for explaining the spot means shown in Fig. 2;
4 is a view for explaining the controller in Fig.
5 is a view for explaining the fixing device in Fig.
6 is a view for explaining an object of a spot welding system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

The meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Now, a spot welding system according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view for explaining a spot welding system according to an embodiment of the present invention.

Referring to FIG. 1, a spot welding system 1000 includes a welder 100, a fixture 200, and a controller 300.

The welding machine 100 fixes and welds the object W to the fixture 200.

The fixing device 200 serves to fix the object W at the welding of the welding machine 100.

The controller (300) controls the welder (100) and the fixture (200).

In one embodiment, the controller 300 includes a power supply unit 310 and a control unit 320.

In one embodiment, the power supply unit 310 serves to supply necessary power to the welder 100 and the fixture 200.

In one embodiment, the control unit 320 is driven by receiving power from the power source unit 310 and controls driving of the welding machine 100 and the fixture 200.

In one embodiment, the control unit 320 includes a power conversion means 321. [

In one embodiment, the power conversion unit 321 serves to supply power from the power unit 310 and convert the power to the power required by the welder 100.

In one embodiment, in the spot welding system 1000, the control unit 320, which receives the welding command from the operator after placing the object W in the fixture 200, generates a fixed signal power, The fixture 200 fixes the object. When the object W is fixed to the fixture 200 in the above-described process, the control unit 320 generates a welding signal power, the power of the power unit 310 is transformed into a welding power source through the power conversion unit 321, The control unit 320 generates a fix release signal power and the fixture 200 receives the fix release signal power and supplies the fixture release signal power to the object W. [ Unfreeze.

Fig. 2 is a view for explaining the welding machine shown in Fig. 1. Fig.

Referring to FIG. 2, the welder 100 includes a spot weld 110 and a robotic arm 120.

The spot welded part 110 is formed on one side of the robot arm part 120 to perform spot welding of the object W.

The robot arm part 120 forms a spot welded part 110 on one side and plays a role for bringing the spot welded part 110 into contact with the object W. [

In one embodiment, the robot arm 120 is formed of a multi-joint and is rotatable and angularly adjustable so that welding can be performed even when there is a welding point on the inclined surface of the object W.

In one embodiment, the robotic arm 120 includes cylinder means 121 for adjusting the length of the spot weld 120 to enable active welding for various welding situations.

Fig. 3 is a view for explaining the spot means shown in Fig. 2;

Referring to FIG. 3, spot weld 110 includes spot means 111.

In one embodiment, a plurality of spot means 111 are provided and serve to spot weld each of a plurality of points of the object W, respectively.

In one embodiment, the spot weld 110 may connect each of the spot means to the power conversion means 321 in parallel so that the same power is applied to each of the spot means 111.

In one embodiment, the power conversion means 321 simultaneously inputs the converted power to the spot means 111 so that the same power source is applied to each of the spot means 111 at the same time.

4 is a view for explaining the controller in Fig.

4, the control unit 320 may further include a resistance detection unit 323, a processing unit 324, and an output unit 325 in one embodiment.

In one embodiment, the resistance detection means 323 is connected to the spot means 111 and serves to detect resistance in the spot means 111. [

In one embodiment, the processing means 324 is connected to the resistance detection means 323, and compares the resistance value detected by the resistance detection means 323 with a preset reference resistance value to determine whether the abnormality is abnormal do.

In one embodiment, the output means 325 is connected to the processing means 324 and serves to output the anomaly determined by the processing means 324.

In one embodiment, the resistance detection means 323 includes a resistance detection line 323a and a resistance detection substrate 323b.

In one embodiment, a plurality of resistance detection lines 323a are connected to each of the spot means 111 and serve to detect the resistance of the spot means 111. [

In one embodiment, the resistance detection board 323b is connected to the resistance detection line 323a and plays a role of applying the resistance value detected by the resistance detection line 323a to the processing means 324.

5 is a view for explaining the fixing device in Fig.

Referring to FIG. 5, the fixing device 200 includes a body 210, a seat 220, and a fixing part 230.

The main body 210 is formed with a seating part 220 on its upper surface to form a fixing part 230 on which the object W is placed and on which the object W is fixed.

The seating part 220 is formed on the upper surface of the main body 210 and serves to seat the lower part of the object W. [

The fixing part 230 is formed on one side of the body part 210 and fixes the object W placed on the mounting part 220 so as not to be detached.

Referring to FIG. 5, an electrode 220a is formed in the seating part 220 so that the lower surface of the object W to be placed on the inner side is in contact with the lower surface.

In one embodiment, when the spot means 111 contacts the upper surface of the object W, the spot means 111 is energized with the seating portion 220 via the object to effect spot welding.

Referring to FIG. 5, in one embodiment, the securing portion 230 includes a rotatable securing means 231, a cylindrical securing means 232, and a lifting means 233.

In one embodiment, the rotatable fastening means 231 is rotatably provided on one side of the body 210, and functions to press and fix or unfasten the upper surface of the object W.

The cylindrical fastening means 232 is formed on the other side of the body portion 210 and is configured to press and fix one side of the object W seated on the fastening portion 220 Role.

The lifting means 233 supports the lower surface of the object W and serves to lift the object W that has been subjected to the process and move it away from the seating portion 220.

6 is a view for explaining an object of a spot welding system in an embodiment of the present invention.

6, in one embodiment, the object is placed on one side of a pipe P or a pipe P formed in a tubular shape whose front end side, the stop side and the rear end side are not parallel to each other, (B) to be connected to the pipe (P) or fixed to the pipe (P). Further, the shape of the pipe P and the bracket B is not limited to this, and can be configured in various forms.

As described above, the embodiment of the present invention is not limited to the above-described apparatus and / or method, but may be implemented by a program for realizing a function corresponding to the configuration of the embodiment of the present invention and a recording medium on which the program is recorded And the present invention can be easily implemented by those skilled in the art from the description of the embodiments described above. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: spot welding portion
111: Spot means
120: robot arm part
121: Cylinder means
200: Retainer
210:
220:
230:
300: controller
310:
320:
321: Power conversion means

Claims (5)

A welder for welding the object;
A fixture for fixing an object during welding of the welder; And
And a controller for controlling the welder and the fixture,
The controller includes: a power supply unit for supplying power necessary for the welding machine and the fixture; And a control unit that is driven by receiving power from the power source unit and controls driving of the welding machine and the fixing unit,
Wherein the control unit includes a power conversion unit for converting power supplied from the power unit into power required for the welding machine,
The welding machine includes:
A spot welding portion for spot welding an object; And
And a robot arm portion for forming the spot welded portion on one side and causing the spot welded portion to contact the object.
The spot welding portion
And a plurality of spot means for spot welding each of a plurality of points of the object,
Wherein each of the spot means is connected to the power conversion means in parallel so that the same power source is applied to each of the spot means,
Wherein the power conversion means simultaneously inputs the converted power to the spot means so that the same power source is simultaneously applied to each spot means,
The fixture includes:
A body portion;
A seating part formed on an upper surface of the body part to seat a lower portion of the object; And
And a fixing part formed at one side of the body part and fixing the object placed on the seat part so as not to be detached,
The fixing unit includes: a rotatable fixing means formed to be rotatable on one side of the main body, for pressing and fixing or releasing the upper surface of the object; A cylindrical fixing means formed on the other side of the body portion for pressing and fixing or releasing one side of the object placed on the seat portion; And an elevating means for supporting the lower surface of the object and raising the object to be processed and releasing it from the seat portion.
The apparatus according to claim 1,
And a bracket that is seated on one side of the pipe and connects a plurality of the pipes to each other or is fixed to the pipe. Spot welding system.
delete delete The seat according to claim 1,
And an electrode is formed so that the lower surface of the object to be seated on the inner side is in contact with the lower surface of the object.

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