KR101557705B1 - Welding tip change apparatus for spot welding - Google Patents

Abstract

A welding tip replacing apparatus for spot welding is disclosed. A welding tip replacing apparatus for spot welding according to an embodiment of the present invention includes: a base frame installed in a worksite provided with a spot welder having upper and lower welding guns; A mounting plate mounted on an upper portion of the base frame; A welding tip removing unit mounted on one side of the upper surface of the mounting plate for clamping and removing a welding tip mounted on the upper welding gun or the lower welding gun through a cylinder operation; And a welding unit which is mounted on the upper surface of the mounting plate at a position spaced apart from the welding tip detaching unit and supplies the welding tip to be mounted to the upper and lower welding guns, Tip supply unit.

Description

[0001] WELDING TIP CHANGE APPARATUS FOR SPOT WELDING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding tip exchanging apparatus for spot welding, and more particularly, to a welding tip exchanging apparatus for spot welding that enables a new welding tip to be automatically exchanged when a welding tip mounted on a spot welding gun is worn will be.

Generally, during the assembly process of a vehicle body, spot resistance welding is widely used as a method of welding two panels. Such spot resistance welding forms electric resistance by applying pressure to the panel surface, Is an electric resistance welding.

The spot resistance welding is usually performed by a welding robot, and a spot welding gun is provided at the tip of the welding robot.

1, the spot welding gun includes a fixed electrode rod 1 (i.e., a holder) and a movable electrode rod 3 (i.e., a shank) And a welding gun driving device is provided so as to generate a pressing force for driving the movable electrode rod (3).

The welding tip 5 is fitted to the tip of the fixed electrode rod 1 and the movable electrode rod 3. The diameter of the tip of the welding tip 5 is, for example, 6 mm and the diameter of the other portion is about 16 mm .

The spot welding gun welds the two-panel panel 10 to be welded between the fixed electrode rod 1 and the movable electrode rod 3.

When the panel 10 is sandwiched between the movable electrode rod 1 and the fixed electrode rod 3 repeatedly as described above, the tip of the welding tip 5 is worn by pressure and heat, The welding tip (5) must be replaced periodically as welding failure will occur if it exceeds the allowable limit.

However, in the related art, when the welding tip 5 is replaced, a worker is manually replaced using a pipe wrench and a hammer, so that the replacement time is lengthened, resulting in deterioration in productivity and replacement failure.

In addition, when the worker directly enters the work line and exchanges the welding tip in the spot welding gun mounted on the robot, the worker is exposed to a great deal of risk. When the welding tip 5 is replaced by using the hammer, A partial breakage may occur or a position where the upper and lower welding guns are misaligned may occur.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art. Accordingly, it is an object of the present invention to provide a welding apparatus and a welding method for welding a welding tip mounted on upper and lower welding guns of a spot welding machine, To provide a welding tip supply device for spot welding that can shorten the time required for welding tip replacement and alignment and automate the replacement process.

According to an aspect of the present invention, there is provided an apparatus for exchanging a welding tip for spot welding, comprising: a base frame installed in a worksite provided with a spot welder having upper and lower welding guns; A mounting plate mounted on an upper portion of the base frame; A welding tip removing unit mounted on one side of the upper surface of the mounting plate for clamping and removing a welding tip mounted on the upper welding gun or the lower welding gun through a cylinder operation; And a welding unit which is mounted on the upper surface of the mounting plate at a position spaced apart from the welding tip detaching unit and supplies the welding tip to be mounted to the upper and lower welding guns, Wherein the welding tip removing unit is mounted on an upper portion of the mounting plate and has an insertion hole for inserting the worn weld tip mounted on the upper and lower welding guns on one side thereof; A supporting portion integrally projecting from one side of the insertion hole toward the upper side of the clamping block and supporting one side of the welding tip inserted into the insertion hole; A clamper rotatably mounted on one side of the clamping block on the opposite side of the support unit with the rotation center being eccentric; A connecting bar having one end connected to one side of the clamper and a connecting hole formed at the other end; And a clamping cylinder mounted on the clamping block, the clamping block including a working rod, a tip of the working rod mounted on a clevis mounted on the connecting hole of the connecting bar, and a clamping cylinder mounted on the clamping block.

delete

The support portion may be formed with a round-shaped support groove on one side corresponding to the insertion hole.

The clamper is formed in a circular block shape and can be knurled for a predetermined period around the outer circumferential surface of the clamping cylinder which is rotationally moved toward the insertion hole during operation of the clamping cylinder.

The connection hole may be formed in the shape of a slot having a long hole along the longitudinal direction at the center of the other end of the connection bar.

The clamping cylinder may be formed of a pneumatic cylinder whose working pressure is pneumatic.

The clamping cylinder may be a hydraulic cylinder whose hydraulic pressure is an operating pressure.

The welding tip mounted on the tip of the upper welding gun is inserted downward from the upper portion of the insertion hole and the welding tip mounted on the tip of the lower welding gun can be inserted from the lower portion of the insertion hole toward the upper portion.

Wherein the welding tip supply unit is mounted on the other side of the upper surface of the mounting plate in a direction perpendicular to the welding tip removing unit and has a first end opened and a space formed therein; A plurality of welding tips provided on the upper and lower sides of the loading hole, the loading holes being formed in the loading hole, the loading holes being formed at one end of the loading hole, holder; Welding tip alignment means installed in the loading hole inside the welding tip holder to prevent each of the welding tips from being separated from the loading hole while being aligned inside the loading hole of the welding tip holder; And a supply cylinder mounted to the other end of the housing and connected to the other end of the welding tip holder to selectively project the welding tip holder from the housing with the operating rod inserted into the housing .

The welding tip holder may be formed with a diaphragm that divides an upper portion and a lower portion at an inner center of the loading hole.

The welding tip aligning means may be mounted on the upper and lower portions of the loading hole, respectively, with the diaphragm interposed therebetween.

The loading hole may be formed at the center of one end of the welding tip holder in a slot shape along the longitudinal direction.

Wherein the welding tip alignment means comprises an alignment cap movably mounted within the loading hole at the other end of the welding tip holder and in contact with the welding tip; And an elastic member interposed between the loading hole and the alignment cap, the elastic member providing an elastic force to the alignment cap.

The alignment cap may be formed such that a tip corresponding to the welding tip is rounded.

The elastic member may include a coil spring having one end supported by the loading hole and the other end supported by the alignment cap.

The supply cylinder may be made of a pneumatic cylinder fixed to the housing through a screw connection, and the operation pressure of which is pneumatic.

The supply cylinder may be a hydraulic cylinder whose hydraulic pressure is the operating pressure.

As described above, according to the welding tip exchanging apparatus for spot welding according to the embodiment of the present invention, the welding tips of the upper and lower welding guns are automatically replaced when the welding tips mounted on the upper and lower welding guns of the spot welding machine are worn , It is possible to shorten the time required for replacement and alignment of the welding tip, to improve the productivity by automating the replacement process, and to prevent occurrence of defective replacement of the welding tip.

In addition, by automating the welding tip replacement work, which has conventionally been performed manually, it is possible to prevent the operator from being exposed to the risk factors, thereby preventing the occurrence of safety accidents and securing the safety of the worker. It is possible to prevent a phenomenon that the position of the upper and lower welding guns of the upper and lower welding guns is changed.

In addition, since the welding tips mounted on the upper and lower welding guns can be replaced with one welding tip exchanging apparatus, there is also an effect of reducing manufacturing costs such as the labor cost of the worker according to the conventional manual work.

1 is a configuration diagram of a spot welding gun according to the prior art.
2 is a perspective view of a welding tip changing apparatus for spot welding according to an embodiment of the present invention.
3 is a plan view of a welding tip removing unit applied to a welding tip replacing apparatus for spot welding according to an embodiment of the present invention.
4 is a perspective view of a welding tip clamper in a welding tip removal unit applied to a welding tip replacement apparatus for spot welding according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view taken along line AA of Fig. 2, and is a cross-sectional view of a welding tip feeding unit applied to a welding tip exchanging apparatus for spot welding according to an embodiment of the present invention.
FIGS. 6 and 7 are operational states of a welding tip removing unit applied to a welding tip replacing apparatus for spot welding according to an embodiment of the present invention.

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.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

And throughout the specification, when an element is referred to as " comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", " unit of means ", " part of item ", " absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

FIG. 2 is a perspective view of a welding tip exchanging apparatus for spot welding according to an embodiment of the present invention, FIG. 3 is a plan view of a welding tip removing unit applied to a welding tip exchanging apparatus for spot welding according to an embodiment of the present invention, 4 is a perspective view of a welding tip clamper in a welding tip detaching unit applied to a welding tip exchanging apparatus for spot welding according to an embodiment of the present invention, Fig. 5 is a sectional view taken along the line AA in Fig. 2, Sectional view of a welding tip feeding unit applied to a welding tip exchanging apparatus for spot welding according to the present invention.

Referring to the drawings, a welding tip replacing apparatus 100 for spot welding according to an embodiment of the present invention includes a welding tip 105 mounted at the tip of a welding gun 101, 103 of a spot welder The time for replacement and alignment of the welding tip 105 is shortened by automatically replacing the welding tip 105 mounted on the upper, lower, upper, and lower welding guns 101, 103, and automating the replacement process .

1, a welding tip replacing apparatus 100 for spot welding according to an embodiment of the present invention includes a base frame 110, a mounting plate 115, a welding tip removing unit 120, And a welding tip feeding unit 130. [

First, the base frame 110 is installed in a workplace equipped with a spot welder (not shown) having upper and lower welding guns 101 and 103.

The mounting plate 115 is formed in a rectangular plate shape, and is mounted on the upper portion of the base frame.

In the present embodiment, the welding tip removing unit 120 is mounted on one side of the upper surface of the mounting plate 115 facing the upper and lower welding guns 101 and 103, and the upper welding gun 101 Or in a state in which the welding tip 105 is mounted on the lower welding gun 101, the welding tip 105 which has been used and is worn is clamped and removed.

The welding tip removing unit 120 includes a clamping block 121, a supporting portion 123, a clamper 125, a connecting bar 127, and a clamping cylinder 129, as shown in Figs. .

First, the clamping block 121 is mounted on the upper portion of the mounting plate 115 and has an insertion hole (not shown) for inserting the worn-out welding tip 105 mounted on the upper and lower welding guns 101 and 103, (122) is formed.

The supporting part 123 integrally protrudes from one side of the insertion hole 122 toward the upper side from the clamping block 121 and supports one side of the welding tip 105 inserted into the insertion hole 122 do.

Here, the support part 123 may have a round support groove 124 formed on one side corresponding to the insertion hole 122.

The upper welding gun 101 is inserted in the lower portion of the insertion hole 122 downward so that the welding tip 105 mounted on the tip of the upper welding gun 101 is inserted downward, The tip 105 may be inserted upward from the bottom of the insertion hole 122.

The support groove 124 supports one side of the upper end of the welding tip 105 when the upper welding gun 101 is inserted into the upper portion of the insertion hole 122, The upper end of the welding tip 105 is supported when the lower welding gun 103 is inserted upward.

In this embodiment, the clamper 125 is rotatably mounted on one side of the clamping block 121 on the opposite side of the support portion 123 in a state where the rotation center C is eccentrically rotated, The welding tip 105 inserted into the hole 122 is clamped while being supported by the support groove 124 of the support portion 123.

Accordingly, the outer surface of the clamper 125 can be moved toward the insertion hole 122 on the clamping block 121 while being rotated around the eccentric rotation center C.

One end of the connecting bar 127 is connected to one side of the clamper 125 and at the other end of the connecting bar 127 is formed a slot 126 having a long slot shape along the longitudinal direction at the other end of the connecting bar 127 .

The clamping cylinder 129 includes an actuating rod and a tip of the actuating rod is mounted on a clevis 128 mounted on a connecting hole 126 of the connecting bar 127. The connecting rod 127, And is mounted to one side of the clamping block 121 at a position corresponding to the clamping block 121.

The clamping cylinder 129 selectively rotates the clamper 125 connected to the connecting bar 127 through the forward and backward reciprocating operation toward the insertion hole 122 with respect to the eccentric rotation center C .

Here, the clamping cylinder 129 may be a pneumatic cylinder having an operating pressure of pneumatic pressure, but the present invention is not limited thereto, and hydraulic pressure capable of replacing the pneumatic pressure may be applied.

4, the clamper 125 is formed in the shape of a circular block. When the clamping cylinder 129 is operated, the connecting bar 127 rotates the rotation center C for a predetermined interval around the outer circumferential surface that is rotationally moved toward the insertion hole 122.

The knurled surface of the outer circumferential surface of the clamper 125 clamps the welding tip 105 together with the support groove more stably when the welding tip 105 is clamped.

The welding tip supplying unit 130 is mounted on the upper surface of the mounting plate 115 at a position spaced apart from the welding tip removing unit 120 and is connected to the welding tip 105 to be mounted on the upper and lower welding guns 101, 105 that have been detached.

The welding tip supply unit 130 includes a housing 131, a welding tip holder 133, a welding tip aligning means 136, and a supply cylinder 139, as shown in Fig.

First, the housing 131 is mounted on the other side of the upper surface of the mounting plate 115 in a direction perpendicular to the welding tip removing unit 120, one end is opened, and a space S is formed therein.

The welding tip holder 133 is inserted into one end of the opening of the housing 131 so as to be slidably mounted. The one end of the welding tip holder 133 has a predetermined section loading hole 134 formed along the longitudinal direction thereof. A new welding tip 105 to be mounted on a plurality of welding guns 101 and 103 is provided on the upper and lower sides of the welding guns 101 and 103, respectively.

In the present embodiment, the loading hole 134 may be formed in the shape of a slot having a slot along the longitudinal direction at the center of one end of the welding tip holder 133.

In the welding tip holder 133, a diaphragm 135 may be formed at an inner center of the loading hole 134 to divide the upper and lower portions along the longitudinal direction.

The diaphragm 135 is installed in the upper and lower rows of the loading hole 134 so that the upper and lower welding guns 101 and 103 can be loaded with new welding tips 105, The upper and lower portions of the loading hole 134 are divided in the longitudinal direction.

The welding tip aligning means 136 is installed in the loading hole 134 inside the welding tip holder 133 and each of the welding tips 105 is inserted into the loading hole 133 of the welding tip holder 133 134 from being disengaged from the loading hole 134 in an aligned state.

The welding tip aligning means 136 is mounted on the upper and lower portions of the loading hole 134 with the partition 135 therebetween and is provided with welding tips 105 ).

Here, the welding tip alignment means 136 includes an alignment cap 137 and an elastic member 138.

First, the alignment cap 137 is located at the other end of the plurality of welding tips 105 mounted movably inside the loading hole 134 at the other end of the welding tip holder 133 And the distal end is in contact with the last welding tip (105).

Here, the alignment cap 137 may be formed on the welding tip 105 so as to be smoothly loaded on the loading hole 134 while minimizing damage or friction to the welding tip 105 when the welding tip 105 is in contact with the welding tip 105. [ May be formed so as to be rounded.

The elastic member 138 is interposed between the loading hole 134 and the alignment cap 137 and provides an elastic force to the alignment cap 137. The elastic member 138 has one end supported by the loading hole 134, And the other end may be a coil spring supported at the rear end of the alignment cap 137.

The supply cylinder 139 is attached to the other end of the housing 131 and connected to the other end of the welding tip holder 133 with the operating rod inserted into the housing 131, The welding tip holder 133 protrudes from the opened end of the housing 131 at a certain time only when the welding tips of the welding tips 101 and 103 are replaced.

Here, the supply cylinder 139 may be a pneumatic cylinder fixed to the other end of the housing 131 through a screw connection, and the operation pressure may be a pneumatic pressure. However, the present invention is not limited thereto, The application of the hydraulic pressure will be possible.

That is, the welding tip feeding unit 130 configured as described above is configured such that the upper and lower welding guns 101 and 103, from which the worn out welding tip 105 is removed through the operation of the welding tip removing unit 120, The welding tip holder 133 is protruded from the housing 131 by a predetermined amount so that the upper and lower welding tips 105 are exposed one by one by the operation of the supply cylinder 139. [

Then, the welding guns 101 and 103 are moved toward the opposite side from the top or bottom of the new welding tip 105 exposed in the state of being loaded on the welding tip holder 133 by the behavior of the robot, (105) is attached to the tip of each welding gun.

The welding guns 101 and 103 are moved upward or downward from the welding tip holder 133 by the action of the robot equipped with the spot welding machine so that the new welding tip 105 can be moved .

Hereinafter, the operation and operation of the welding tip replacement apparatus 100 for spot welding according to the embodiment of the present invention will be described in detail.

FIGS. 6 and 7 are operational states of a welding tip removing unit applied to a welding tip replacing apparatus for spot welding according to an embodiment of the present invention.

First, as shown in Fig. 6, the upper welding gun 101 or the lower welding gun 103 equipped with the welding tip 105, which is worn and replaced, The insertion hole 122 of the clamping block 121 inserts the welding tip 105 which requires replacement from the top to the bottom or from the bottom to the top.

Then, when the insertion of the welding tip 105 is completed, the clamping cylinder 129 advances the operating rod to move the operating rod to the connecting bar 127 connected via the clevis 128, The connection bar 127 is rotated.

At this time, the operating rod of the clamping cylinder 129 moves the clevis 128 freely on the connection hole 127 of the connection bar 127 to smoothly transmit the operating force to the connection bar 127 .

The clamper 125 is rotated toward the insertion hole 122 with respect to the rotation center C eccentrically rotated by the connecting bar 127 to be rotated so that a certain portion of the outer circumferential surface processed by the knurling process contacts the welding tip 105 The welding tip 105 is moved to the support groove 124 of the support portion 123 so that one side of the welding tip 105 is supported by the support groove 124. Then, 105 are clamped.

When the clamping of the welding tip 105 is completed through the clamper 125, the robot with the not shown spot welding machine moves and the upper and lower welding guns 101 and 103 are moved from the insertion hole 122 The worn out welding tip 105 is completely removed from the front ends of the upper and lower welding guns 101 and 103.

When the movement of the upper and lower welding guns 101 and 103 is completed, the clamping cylinder 129 is moved backward to return the clamper 125 to the initial position, The clamping of the welding tip 105 which has been clamped in the inserted state is released and the worn out welding tip 105 with the removal from each welding gun 101 and 103 is discarded to the floor of the workshop.

That is, the process as described above is repeated to automatically remove the worn out welding tip 105 from each welding gun 105.

On the other hand, the upper and lower welding guns 101 and 103, which have been completely removed from the welded tip 105, are moved to the welding tip feed unit 130 by the behavior of the robot to which the spot welder is connected, The supply unit 130 causes the welding tip holder 133 to protrude from the housing 131 at a certain distance so that the upper and lower welding tips 105 are exposed one by one by the operation of the supply cylinder 139. [

Then, the welding guns 101 and 103 are moved toward the opposite side from the top or bottom of the new welding tip 105 exposed in the state of being loaded on the welding tip holder 133 by the behavior of the robot, (105) is attached to the tip of each welding gun.

The welding guns 101 and 103 are moved upward or downward from the welding tip holder 133 by the action of the robot equipped with the spot welding machine so that the new welding tip 105 can be moved .

Therefore, when the welding-tip replacing apparatus 100 for spot welding according to the embodiment of the present invention as described above is applied, welding (not shown) of the top and bottom welding guns 101 and 103 By automatically replacing the welding tips 105 mounted on the upper and lower welding guns 101 and 103 at the time of abrasion of the tip 105, the time for replacing and aligning the welding tips 105 is shortened, It is possible to improve the productivity by automating the process and to prevent occurrence of defective replacement of the welding tip.

In addition, by automating the welding tip replacement work which has conventionally been carried out by hand, it is possible to prevent the worker from being exposed to the risk factors, thereby preventing the occurrence of the safety accident and ensuring the stability of the worker, Or the position of the upper and lower welding guns 101 and 103 of the spot welding machine can be prevented from being changed.

In addition, since the welding tip 105 mounted on the upper and lower welding guns 101 and 103 can be replaced by one welding tip changing apparatus 100, it is possible to replace the manufacturing costs such as the labor cost of the operator Can be saved.

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 will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: welding tip changing device 101: upper welding gun
103: Lower welding gun 105: Welding tip
110: base frame 115: mounting plate
120: welding tip removing unit 121: clamping block
122: insertion hole 123:
124: support groove 125: clamper
126: connection hole 127: connection bar
128: Clevis 129: Clamping cylinder
130: welding tip supply unit 131: housing
133: welding tip holder 134: loading hole
135: diaphragm 136: welding tip alignment means
137: alignment cap 138: elastic member
139: Supply cylinder

Claims (17)

A base frame installed in a worksite provided with a spot welder having upper and lower welding guns;
A mounting plate mounted on an upper portion of the base frame;
A welding tip removing unit mounted on one side of the upper surface of the mounting plate for clamping and removing a welding tip mounted on the upper welding gun or the lower welding gun through a cylinder operation;
And a welding tip mounted on the other side of the upper surface of the mounting plate at a position spaced apart from the welding tip detaching unit for supplying the welding tip to be mounted on the upper and lower welding guns, And a supply unit,
The welding tip removing unit
A clamping block mounted on an upper portion of the mounting plate and having an insertion hole for inserting the worn-out welding tip mounted on the upper and lower welding guns on one side thereof;
A supporting portion integrally projecting from one side of the insertion hole toward the upper side of the clamping block and supporting one side of the welding tip inserted into the insertion hole;
A clamper rotatably mounted on one side of the clamping block on the opposite side of the support unit with the rotation center being eccentric;
A connecting bar having one end connected to one side of the clamper and a connecting hole formed at the other end; And
A clamping cylinder mounted on the clamping block, the clamping block including a working rod, a tip of the working rod mounted on a clevis mounted on a connecting hole of the connecting bar;
And a welding tip for welding the welding tip for spot welding. delete The method according to claim 1,
The support
And a round-shaped support groove is formed in one side surface corresponding to the insertion hole. The method according to claim 1,
The clamper
Wherein the clamping cylinder is formed in a circular block shape and is knurled for a predetermined period around an outer peripheral surface of the clamping cylinder which is rotationally moved toward the insertion hole during operation of the clamping cylinder. The method according to claim 1,
The connection hole
Wherein the connection bar is formed at the center of the other end of the connection bar in a slot shape having a long hole along the longitudinal direction. The method according to claim 1,
The clamping cylinder
And a pneumatic cylinder whose working pressure is pneumatic. The method according to claim 1,
The clamping cylinder
And a hydraulic cylinder having an operating pressure as hydraulic pressure. The method according to claim 1,
The upper welding gun
Wherein the welding tip mounted on the tip is inserted downward from the top of the insertion hole and the welding tip mounted on the tip of the bottom welding gun is inserted from the bottom to the top of the insertion hole. Exchange device. The method according to claim 1,
The welding tip supply unit
A housing mounted on the other side of the upper surface of the mounting plate in a direction perpendicular to the welding tip removing unit, the housing having one end opened and a space formed therein;
A plurality of welding tips provided on the upper and lower sides of the loading hole, the loading holes being formed in the loading hole, the loading holes being formed at one end of the loading hole, holder;
Welding tip alignment means installed in the loading hole inside the welding tip holder to prevent each of the welding tips from being separated from the loading hole while being aligned inside the loading hole of the welding tip holder; And
A supply cylinder mounted on the other end of the housing and connected to the other end of the welding tip holder to selectively project the welding tip holder from the housing with the operating rod inserted into the housing;
And a welding tip for welding the welding tip for spot welding. 10. The method of claim 9,
The welding tip holder
And a diaphragm that defines an upper portion and a lower portion is formed at an inner center of the loading hole. 11. The method of claim 10,
The welding tip alignment means
And the welding holes are mounted on the inside and the bottom of the loading hole with the diaphragm interposed therebetween. 10. The method of claim 9,
The loading hole
Wherein the welding tip holder is formed at the center of one end of the welding tip holder in a slot shape having a long hole along the length direction thereof. The method according to any one of claims 9 to 11,
The welding tip alignment means
An alignment cap movably mounted within the loading hole at the other end of the welding tip holder and in contact with the welding tip;
An elastic member interposed between the loading hole and the alignment cap, the elastic member providing an elastic force to the alignment cap;
And a welding tip for welding the welding tip for spot welding. 14. The method of claim 13,
The alignment cap
And a tip corresponding to the welding tip is rounded. 14. The method of claim 13,
The elastic member
Wherein one end is supported by the loading hole and the other end is formed by a coil spring supported by the alignment cap. 10. The method of claim 9,
The feed cylinder
And a pneumatic cylinder which is fixed to the housing through a screw connection and whose operating pressure is pneumatic. 10. The method of claim 9,
The feed cylinder
And a hydraulic cylinder having an operating pressure as hydraulic pressure.

Images