KR101044089B1 - Lengthwise spot welding apparatus - Google Patents

Abstract

PURPOSE: A longitudinal spot welding apparatus is provided to minimize a recess formed on the rear welded portion of an object by implementing spot welding while transferring a plurality of welding materials arranged in the longitudinal direction of the object. CONSTITUTION: A longitudinal spot welding apparatus comprises a base(110), a vertical support stand(120), a support tray(130), a drive motor(140), welding guns(150), guide members(160), a movable electrode, a height control member, and an elastic member. The base is formed with parallel guide rails(111) on top. The vertical support stand is installed in the longitudinal direction of the base. The support tray is set on the guide rails to receive and transfer an object. The drive motor transfers the support tray back and forth. The welding guns are arranged in the vertical support stand and vertically moved up and down. The guide members are installed under the welding guns to arrange welding materials and guide the welding materials linearly in welding. The movable electrode is wired with cables and located at an angle to contact or separate from the bottom of the support tray. The height control member is installed on the base to control the height of the movable electrode. The elastic member elastically supports the guide rod of the movable electrode.

Description

Longitudinal spot welding apparatus

The present invention relates to a spot welding apparatus, and more particularly, to arrange a plurality of base materials in a single direction in the longitudinal direction of the attachment object to enable uniform spot welding, as well as to the attachment object during welding. The present invention relates to a longitudinal spot welding apparatus capable of minimizing concave dents occurring at the back side welded portion.

In general, in a device for attaching a metal plate by welding, a spot welding machine stacks a metal plate to be welded, aligns the ends of the electrodes with the metal plate above and below, and concentrates current and pressing force on the minute portions of the metal plate. In this case, the welding is performed by locally heating and applying a predetermined pressure at the same time.

That is, the spot welding device is achieved by resistance welding to the minute point of the metal plate to be welded, and the length is long, and in order to attach the base material of the welding target to the attachment object of a size long and difficult for the operator to handle directly In order to weld by placing more than one base material of the same welding object, in particular, the fixing jig must be accompanied by the welding device.

For reference, the welding objects described above correspond to a plurality of gap holding parts (single pieces of base material) on the metal plate material (corresponding to the object to be attached) for the purpose of preventing deformation of the door from external pressure in the door made of metal plate material, for example. To attach).

In the conventional spot welding, in the case of a gantry type (type C type) welding apparatus having a single movable electrode and a fixed electrode, it is difficult to perform spot welding of a relatively large area or a long attachment object as described above.

In consideration of the above, there is a device in which the attachment object is placed, the attachment object is moved in steps by a predetermined length, and the base material to be welded is placed thereon so that the base material is arranged in a large number, but each welding is performed. It is difficult to accurately attach and weld the object base material to the object to be attached, and in particular, when the base material and the object to be attached are thin plates, the pressure applied to the movable electrodes against the fixed electrodes during welding is different. There was a problem that the post processing is required because the concave (dent) is left in the weld.

The present invention has been invented in view of the conventional problems as described above, by arranging a plurality of base materials produced in a single piece in the longitudinal direction of the object to be attached to enable uniform spot welding, as well as welding Longitudinal spot welding device to minimize post-machining work mf by minimizing concave dent generated at the back side welding part of the object to be attached during test The purpose is to provide.

According to the present invention for achieving the above object, in the longitudinal spot welding apparatus,

The spot welding apparatus includes: a base having parallel guide rails on both upper sides thereof; A vertical support installed in the longitudinal direction of the base; A support tray seated on the guide rail of the base for seating and transporting the attachment object; A drive motor for conveying the support tray forward and backward; A plurality of welding guns installed in a plurality of arrays from a vertical support and installed vertically in a downward direction; A guide member spaced apart from the lower part where the welding gun is installed, to place a welding base material to be welded to the attachment object, and to guide the base material in a straight line during welding; It is wired from the welding gun to the vertical support via a cable, the lower portion is formed to be inclined so as to be in close contact or spaced from the lower portion of the support tray, the inclined lower surface and the movable electrode is arranged a plurality of guide rods; A plurality of height adjusting members installed from a base to vertically adjust the movable electrodes; It consists of a plurality of elastic members for supporting the guide rod of the movable electrode to give elasticity, wherein the support tray is provided with a through hole for positioning the attachment object in the center, one side of the through hole according to the length of the attachment object A plurality of supporting variable members are installed to support the bottom of the front and rear of the object to be attached, and a rack gear is provided on one side of the lower support tray, and the rack gear is reciprocated by being engaged with the pinion gear provided in the driving motor. This is achieved by providing a spot welding device.

The support variable member according to the invention is characterized in that the variable stand is installed to be movable back and forth in the guide provided integrally from the fixing bracket fixed on the support tray.

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The guide member according to the present invention is fixed at both ends by brackets from both sides of the vertical support, and is formed as a fastening screw so as to move left and right in accordance with the position of the welding base material from the long hole is arranged in the longitudinal direction, and the long hole on the holder The first guide member is fixedly installed, and the first guide member is provided on the lower portion of the first control member to support the longitudinal direction of the welding base material with respect to the attachment object, and a pair of first and second guide rollers facing each other back and forth. , The pneumatic cylinder is vertically installed on both sides of the upper portion of the fixing stand in which the first guide member is installed, and the fixing plate formed with a long hole in the longitudinal direction is connected to the end of the operating rod side of the pneumatic cylinder, and the left and right sides of the fixing plate are movable. The second adjusting rod is fixedly installed as a fastening screw, and a welding cap to be attached to the attachment object is provided at the lower portion of the second adjusting rod. And it characterized in that the first composed of the second guide members each having a third guide roller for guiding a straight line while pressing.

The height adjusting member according to the present invention is installed from the base, and a support for supporting the elastic member in the longitudinal direction, and a plurality of arrangements are provided on the support, the side of the movable rod is provided with a push rod inclined on one side of the movable electrode It is characterized by consisting of a pneumatic cylinder for pushing up the inclined lower portion, and a contact switch installed on the pedestal to limit the maximum stroke distance of the push rod.

The elastic member according to the present invention includes a guide tube body for guiding through a guide rod provided under the movable electrode, a compression spring installed on the guide rod penetrating the guide tube body, and a compression spring mounted at an end of the guide rod. It is characterized by consisting of a stopper for supporting.

The long-range spot welding apparatus according to the present invention supports a plurality of welding base materials made of a single piece in the longitudinal direction of the object to be attached, so that uniform spot welding can be performed while the welding is performed. Minimized concave dent eliminates the need for additional post-processing, and reduces the effort of binding welding base metal to the attachment object during the same product operation, thereby significantly improving work efficiency.

1 is a perspective view showing a spot welding apparatus of the present invention;
2 is a front view showing a spot welding apparatus according to the present invention,
Figure 3 is a side view showing a spot welding apparatus according to the present invention,
Figure 4 is a bottom view showing a guide member according to the present invention,
5 is a side view showing the guide member in FIG. 4;
6 is a front view showing an extract of a state in which the welding base material is guided through the first guide member according to the present invention;
7 is a front view showing an extract of a state in which the welding base material is guided through the second guide member according to the present invention;
8 is a front view showing an extract of the movable electrode and the elastic member according to the present invention;
9 and 10 are a partial side view showing a state in which the welding gun and the movable electrode according to the present invention is spaced or in close contact with the attachment object,
11 is a perspective view illustrating a variable support member on a support tray according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 to 11.

Longitudinal spot welding apparatus 100 according to the present invention,

A base 110 having parallel guide rails 111 at both upper sides thereof; A vertical supporter 120 installed in the longitudinal direction of the base 110; A support tray 130 which is settled on the guide rail 111 of the base 110 to seat and transport the attachment object D; A drive motor 140 for conveying the support tray 130 back and forth; A plurality of welding guns (150) installed from the vertical support member (120) and installed vertically in a downward direction; And a guide member 160 disposed to be spaced apart from the lower part where the welding gun 150 is installed to arrange the welding base materials M1 and M2 to be welded to the attachment object D, and to guide the base materials M1 and M2 in a straight line during welding. ; The cable is wired from the welding gun 150 through the vertical supporter 120, and the lower portion is inclined to be in close contact with or spaced apart from the lower portion of the support tray 130, and a plurality of guide rods 171 are provided on the inclined surface. Two movable electrodes 170; A plurality of height adjusting members 180 installed from a base 110 to vertically adjust the movable electrode 170; It is composed of a plurality of elastic members 190 to support the guide rod 171 of the movable electrode 170 to impart elasticity.

For reference, the attachment object (D) applied to the spot welding apparatus 100 according to the present invention is a door made of a metal material, showing an example of the front panel constituting the door, here the welding base material (M1, M2) As shown in the example attached to the door, the welding base material (M1) is a single piece formed by bending the upper and lower portions in the opposite direction to the vertical iron piece, the welding base material (M2) is a single piece formed by bending one side of the iron piece in a triangle Is shown as an example.

The support tray 130 is provided with a through-hole 131 for positioning the attachment object (D) in the center, one side of the through-hole 131 supports the bottom before and after the attachment object according to the length of the attachment object (D) A plurality of support variable members 132 for the arrangement is installed, the bottom gear side of the support tray 130 is provided with a rack gear 133, the rack gear 133 is a pinion gear provided in the drive motor 140 ( 141 and configured to reciprocate. The drive motor 140 is installed on the vertical support 120 in contact with the base 110.

In addition, the support variable member 132 is installed on the guide 132-2 integrally provided from the fixing bracket 132-1 fixed on the support tray 130 so that the variable stand (132-3) can be moved back and forth. do.

On the other hand, the guide member 160 is fixed to both ends by the bracket (B) from both sides of the vertical support 120, as shown in Figures 4 to 6 attached, the long stand 161a is formed in the longitudinal direction ( 161 and the first adjusting unit 162 is fixedly installed as a fastening screw S so as to be movable left and right according to the position of the welding base material B from the long hole 161 on the fixing stand 161, respectively. A first guide member having a pair of first and second guide rollers R1 and R2 facing and supporting the longitudinal direction of the welding base material M1 with respect to the object to be attached to the lower part of the base 162 facing each other. 160-1 and pneumatic cylinders 163 are vertically installed on both upper sides of the fixing table 161 on which the first guide member 160-1 is installed, and at the end of the operating rod side of the pneumatic cylinders 163. The fixing plate 164 formed with the long hole 164a in the longitudinal direction is connected and installed in the long hole 164a of the fixing plate 164. The second adjusting member 165 is fixedly installed as the fastening screw S, and the lower part of the second adjusting member 165 is in a straight line while pressing the welding base material M2 to be attached to the attachment object D. It consists of a second guide member (160-2) provided with a third guide roller (R3) for guiding.

It is a structure for guiding and supporting the welding base material (M1) by setting the position of the first guide member (160-1) in the left and right direction through the long hole (161a) of the fixed object, the second guide member (160-2) Is to be adjusted to the left and right direction through the long hole (164a) of the fixing plate 164 to determine the position that can support the welding base material (M2).

The first and second guide rollers R1 and R2 are laterally disposed to support both sides of the vertical iron piece of the welding base material M1 as corresponding first and second guide rollers R1 and R2, and at the same time Through the first and second guide rollers (R1, R2) is to be horizontally guided in a straight line.

The height adjusting member 180 is installed from the base 110, the support 181 for supporting the elastic member 190 in the longitudinal direction, and a plurality of arrangements are installed on the support 180, the operating rod side Pneumatic cylinder 183 is provided on one side is inclined to push up the inclined lower portion of the movable electrode 170, and is installed on the pedestal 181 to the maximum stroke distance of the rod 182 It is composed of a limiting contact switch 184.

That is, the height of the movable electrode 170 can be adjusted according to the position of the contact switch 183.

As shown in FIG. 8, the elastic member 190 is an auxiliary component that is easy to position the movable electrode 170 positioned upward, to the original state again. The elastic member 190 includes a guide rod 171 provided under the movable electrode 170. Guide tube 191 for guiding through, a compression spring 192 installed on the guide rod 171 penetrating the guide tube 191, and a compression spring 192 is mounted to the end of the guide rod 171 It consists of a stopper 193 for supporting.

In the drawing, reference numeral 152 denotes a high voltage generator that generates a high voltage current in the welding gun.

Referring to the operation according to the use of the spot welding apparatus of the present invention configured as described above is as follows.

First, the object to be attached is settled and set on the support tray provided on the base of the welding apparatus.

The attachment object is supported by and fixed as a support variable member 132 facing the upper front and back sides of the support tray along its length.

The support variable member 132 is a variable band (132-3) to the guide (132-2) integrally provided from the fixing bracket (132-1) fixed on the support tray 130 as shown in FIG. If the object to be attached is short relative to the through hole range of the support tray, the variable bar 132-3 is advanced to the through hole side.

Welding base materials to be welded to the attachment object (D) in the state in which the attachment object is placed as described above are supported by placing in parallel in the longitudinal direction of the attachment object (D) through the guide member 160 installed on the vertical support.

The welding base material M1 is positioned between the first and second guide rollers R1 and R2 on the side of the first adjusting member 162 constituting the first guide member 160-1 so that the welding base material M1 is perpendicular to the welding base material M1. Both sides of the iron piece to be supported as the first and second guide roller (R1, R2).

The welding base material M2 for the attachment object D is bent so that one side is triangulated by the third guide roller R3 on the side of the second adjuster 165 constituting the second guide member 160-2. The third guide roller R3 is supported on the welding base material.

The third guide roller R3 is welded by lowering the fixed plate 164 on which the second control unit 165 is arranged by the pneumatic cylinders 163 provided on both sides of the upper stand 161. The upper surface of the base material (M2) to be in contact with, the left and right adjustment is the welding base material (M2) in a state in which the second control unit 165 is set in advance through the long hole (164a) formed in the fixed plate 164 Support).

As described above, the support tray 130 in the state in which the respective welding base materials M1 and M2 are set to the attachment object D is attached to the driving motor 140 provided in the vertical support 120 in contact with the base 110. It can be moved by the movement of the rack gear 133 of the support tray 30 side engaged with the pinion gear 141 installed on the rotation shaft of the drive motor 140 by the drive, which can be moved in one direction according to the welding speed. Can be.

The welding made with the movement of the support tray 130 is descended by a plurality of welding guns 150 arranged upside down on the vertical support 120 to the joints of the respective welding base materials placed on the upper part of the attachment object D. In close contact with the bottom of the support tray 130, the movable electrode 170 is positioned upward as shown in FIG. 10 to be in contact with the bottom surface of the attachment object D placed on the support tray 130.

The movable electrode is adjusted upward or downward by the height adjusting member 180, and is made by the advance operation of the push rod 182 provided on the working rod side by the operation of the pneumatic cylinder 183 constituting the height adjusting member.

The upper surface of the rod 182 is inclined, and the lower surface of the movable electrode 170 is inclined to the opposite side, so that the movable electrodes 170 are upward as the inclined portions intersect and cross each other, and the backward operation of the rod 182 is performed. It is a structure which descends and is spaced apart from the attachment object D at the time.

The operation of separating the movable electrode from the bottom surface of the object to be attached is quickly performed by the elastic member 190 provided in the guide member 160.

The elastic member 190 penetrates through the guide rod 171 provided below the movable electrode 170 as a guide tube 191, the compression spring 192 is installed on the guide rod 171 The compressed state is maintained by the stopper 193 supported on the lower side, and spaced apart by the restoration of the compression spring 192 during the backward operation of the pusher 182 as described above, and the welding gun is lifted separately to attach the object D. ) Is spaced apart.

On the other hand, the contact switch 184 provided on the pedestal 181 is the welding gun 150 and the movable electrode 170 is attached to the target (D) and the welding base material (M2) in accordance with the state that the contact is turned on as the push rod advances By making electricity in the state of), the welding resistance is automatically generated so that the respective welding base metals can be welded at the same time.

The movable electrode 170 is made of a copper material that is advantageous in power supply, and the cable is connected to the negative terminal of each welding gun 150 installed on the vertical support 120 side, the welding gun 150 And the movable electrode 170, the instantaneous spot is generated by the resistance transferred from the high voltage generator 152 to attach the corresponding welding base material M1 and M2 to the attachment object D.

As described above, the welding base materials M1 and M2 are moved to the corresponding first to third guide rollers R1 to R3 in a state where the support tray 130 is moved by the driving motor 140. The support is moved in a straight state and welding is performed in close contact and separation operation of the welding gun 150 and the movable electrode 170.

As described above, in the state in which the plurality of welding base materials M1 and M2 are disposed on the attachment object D, a series of spot welding is performed by one step at the same time as the movement is performed by the first guide member 160-1 and the second. Resistance welding by the same high voltage through the guide member 160-2 appears uniformly, whereby the welding part is also welded uniformly, eliminating the dent generated in the existing spot welding so that no separate post-processing is required.

Moreover, since the long-range spot welding apparatus 100 according to the present invention welds each of the welding base materials while guiding them in a straight line, the welding base materials can be performed without the need for temporarily fixing or using a binding member to the attachment object. It is possible to improve the productivity of the product for workability.

100: spot welding device 110: base
111: guide rail 120: vertical support
130: support tray 132: variable support member
140: drive motor 150: welding gun
160: guide member 160-1: first guide member
160-2: second guide member 170: movable electrode
180: height adjustment member 190: elastic member
A; Attachment object M1, M2: Welding base material

Claims (6)

In the longitudinal spot welding apparatus,
The spot welding device 100
A base 110 having parallel guide rails 111 at both upper sides thereof;
A vertical supporter 120 installed in the longitudinal direction of the base 110;
A support tray 130 which is settled on the guide rail 111 of the base 110 to seat and transport the attachment object D;
A drive motor 140 for conveying the support tray 130 back and forth;
A plurality of welding guns (150) installed from the vertical support member (120) and installed vertically in a downward direction;
And a guide member 160 disposed to be spaced apart from the lower part where the welding gun 150 is installed to arrange the welding base materials M1 and M2 to be welded to the attachment object D, and to guide the base materials M1 and M2 in a straight line during welding. ;
The cable is wired from the welding gun 150 through the vertical supporter 120, and the lower portion is inclined to be in close contact with or spaced apart from the lower portion of the support tray 130, and a plurality of guide rods 171 are provided on the inclined surface. Two movable electrodes 170;
A plurality of height adjusting members 180 installed from a base 110 to vertically adjust the movable electrode 170;
And a plurality of elastic members 190 which support the guide rod 171 of the movable electrode 170 to impart elasticity.
The support tray 130 is provided with a through-hole 131 for positioning the attachment object (D) in the center, one side of the through-hole 131 supports the bottom before and after the attachment object according to the length of the attachment object (D) A plurality of support variable members 132 for the arrangement is installed, the bottom gear side of the support tray 130 is provided with a rack gear 133, the rack gear 133 is a pinion gear provided in the drive motor 140 ( 141 is a rectangular spot welding device characterized in that the reciprocating conveyance.
delete The method of claim 1,
The support variable member 132 is a variable band 132-3 is installed on the guide 132-2 integrally provided from the fixing bracket 132-1 fixed on the support tray 130 to move back and forth. Rectangular spot welding device.
The method of claim 1,
The guide member 160 is fixed to both ends by the bracket (B) from both sides of the vertical support 120, the support 161 is formed with a long hole (161a) arranged in the longitudinal direction,
According to the position of the welding base material (B) on the fixing stand 161, the first adjusting unit 162 is fixedly installed as a fastening screw S so as to be movable left and right, respectively, and the first adjusting unit 162. The first guide member 160-1 provided with a pair of first and second guide rollers R1 and R2 facing and supporting the longitudinal direction of the welding base material M1 with respect to the attachment object at the lower portion thereof. )Wow,
The pneumatic cylinder 163 is vertically installed on both upper sides of the fixing table 161 in which the first guide member 160-1 is installed, and the operating rod side end of the pneumatic cylinder 163 has a long hole 164a in the longitudinal direction. The formed fixing plate 164 is connected and installed, and the second adjusting unit 165 is fixedly installed as a fastening screw (S) in the long hole 164a of the fixing plate 164 to be movable left and right, and the second adjusting unit 165. The second guide member (160-2) is provided with a third guide roller (R3) for guiding in a straight line while pressing the welding base material (M2) to be attached to the attachment object (D). Rectangular spot welding device.
The method of claim 1,
The height adjusting member 180 is installed from the base 110, the support 181 for supporting the elastic member 190 in the longitudinal direction,
A plurality of arrangements are installed on the pedestal 180, and a pneumatic cylinder 182 having one side inclined on an operation rod side is provided to push up the inclined lower portion of the movable electrode 170, and a pneumatic cylinder 183;
Longitudinal spot welding apparatus, characterized in that consisting of a contact switch 184 is installed on the pedestal (181) to limit the maximum stroke distance of the push rod (182).
The method of claim 1,
The elastic member 190 is a guide tube 191 for guiding through the guide rod 171 provided below the movable electrode 170, and
Compression spring 192 is installed on the guide rod 171 penetrating the guide pipe 191,
Longitudinal spot welding apparatus, characterized in that consisting of a stopper (193) mounted to the end of the guide rod (171) to support the compression spring (192).

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