JP3112747U - X-type welding machine - Google Patents

Abstract

An object of the present invention is to use a gun bracket as a secondary conductor for welding current and reduce the weight, reduce the cost, and easily adjust the condition without requiring parts such as shunts and bus bars to energize the fixed arm. Thus, an X-type welding machine that can be applied to arms having different dimensions is provided.
A rocking arm is formed of a two-part body, and at least three parts in a lateral direction are provided in a part of a rear member 13 in which a front member 15 is held and a part of a gun bracket 2 in which a fixed arm 5 is held. Thus, a plurality of mounting holes 9 and 16 are formed in the vertical direction, and the front member and the fixed arm are held by the fastening tool 7 inserted into at least two mounting holes selected from these mounting holes, and welded. An X-type welding machine in which one of the secondary current terminals 17 from the transformer 6 is connected to the gun bracket, and a welding current conduction path is provided between the welding transformer and the fixed arm via the gun bracket.
[Selection] Figure 1

Description

  The present invention relates to an X-type welding machine in which a pressure driving device for a swing arm, a fixed arm, and a welding transformer for conducting a welding current to both the arms are held by a gun bracket.

  Conventionally, in an X-type welder, a gun bracket simply holds a swing arm drive unit, a fixed arm, and a transformer that conducts welding current to both of these arms. Conduction is performed using a shunt, a bus bar or the like between the transformer and each arm, and the fixed arm is held on a pivot formed on the gun bracket. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 11-267850

  By the way, in the above conventional technique, a shunt or bus bar is also used for energizing the fixed arm. Therefore, there are restrictions on the installation site of the fixed arm equipped with these due to the form of the X-type welder, and the shunt or bus bar Such parts become necessary parts and cost increases. In addition, since the fixed arm and the swing arm are held at predetermined positions of the pivot, there is a problem that the adjustment of the arm cannot be adjusted, and furthermore, when a new arm is employed, it is difficult to align the center.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to use a gun bracket as a secondary conductor of the welding current, and to shunt and busbars to energize the fixed arm. It is intended to provide an X-type welding machine that can be reduced in weight, reduced in cost, easy to adjust, and applicable to arms of different dimensions. is there.

  In order to achieve the above object, an X-type welding machine according to the present invention includes a swing arm, a rear member whose rear end is pivotally supported by a pressure driving device and whose front lower end is pivotally supported by a gun bracket, and a rear end. The front part is composed of two parts of a front member that is held by the rear member and the electrode member is attached to the front end part, and at least three or more in the vertical direction in the part of the rear member that holds the front member A plurality of front member mounting holes are formed in the mounting bracket, and the front member is held by a fastener that is inserted into at least two mounting holes selected from these mounting holes. At least 3 or more fixed arm mounting holes in the vertical direction are formed in the part, and the fixed arm is held by a fastener that is inserted into at least two or more mounting holes selected from these mounting holes. Transformer for welding One of al of the secondary current terminal connected to the gun bracket, is characterized in that between the welding transformer fixed arm and a conductive path for welding current through the gun bracket.

  In addition, the adjustment of the position of the electrode on the fixed arm side corresponds to the vertical displacement of the fixed arm mounting position by the length of the shank, and the vertical movement of the swing arm mounting position swings. The adjustment of the position of the electrode on the arm side corresponds to the length of the shank.

  In the X-type welding machine according to the present invention, at least three or more in the lateral direction and the longitudinal direction in each of the part of the rear member that holds the front member of the swing arm and the part of the gun bracket that holds the fixed arm A plurality of stages of arm mounting holes are formed in the arm, and the arm is held by a fastener inserted through at least two mounting holes selected from these mounting holes, and one of the secondary current terminals from the welding transformer is gunned. Since it is connected to the bracket and a welding current conduction path is provided between the welding transformer and the fixed arm via the gun bracket, the fixed arm can be selected and attached to the mounting hole of the gun bracket at any location up and down or left and right. In addition, since the front member of the swing arm can be selected and attached to the mounting hole of the rear member either up or down or left and right, the arm condition can be easily adjusted arbitrarily. The X-type welder can be applied to different types of arms, and there are no particular restrictions on the form of the X-type welder, no need for parts such as shunts and bus bars to energize the fixed arm, and the cost of the gun bracket is reduced. Compared to shunts, bus bars, and the like, the capacity is large and it is easy to cool, so the conductive path is not overheated even with air cooling.

  The X-type welder makes it possible to adjust the arm depth by selecting the mounting holes on the swing arm and gun bracket on the top, bottom, left, and right, while using the gun bracket as a welding current conduction path. The omission of was realized.

  FIG. 1 is a schematic configuration diagram of an X-type welding machine according to the present invention, and FIG. 2 is a schematic cross-sectional view along AA in FIG.

  In the figure, reference numeral 1 denotes an X-type welding machine. A gun bracket 2 of the welding machine 1 includes a pressure driving device 4 of a swing arm 3, a fixed arm 5, and a welding transformer 6 that conducts a welding current to both arms. Are held by nuts 7, 7,. Further, insulating plates 8, 8,... Are disposed between the pressure driving device 4 and the welding transformer 6 and the gun bracket 2.

  The gun bracket 2 is made of, for example, an aluminum alloy. A plurality of mounting holes 9, 9,... For holding the fixed arm 5 are formed on one end side of the gun bracket 2, and the other end side is a robot (not shown). )) Is provided.

  The swing arm 3 has a rear member 13 whose rear end is pivotally supported 11 by the pressure driving device 4 and whose front lower end is pivotally supported 12 by the gun bracket 2, and a rear end thereof is held by the rear member 13. It consists of a two-part body of a front member 15 to which an electrode member 14 is attached at the front end.

A plurality of mounting holes 16, 16,... For holding the front member 15 are drilled in a portion of the rear member 13 that holds the front member 15, and the mounting holes 16, 16,. At least three (4 in the figure) in the horizontal direction and a plurality of stages (3 in the figure) are formed in the vertical direction (in FIG. Used for fixing).
The front member 15 can be reliably held by using two mounting holes 16, but at least three or more in the lateral direction are required to change the holding portion.

Also, the mounting holes 9, 9,... Are at least three in the horizontal direction and formed in a plurality of stages in the vertical direction (in FIG. 1, two mounting holes 9, 9 on the lower stage and the front side are fixed to the fixing arm 5. Used).
The fixed arm 5 can be reliably held by using two mounting holes 9, but at least three or more in the lateral direction are required to change the holding portion.

  One terminal 17 of the secondary current terminal of the welding transformer 6 is connected to the gun bracket 2 and a fixed arm 5 is connected to the gun bracket 2 to make the gun bracket 2 a secondary conductor of the welding current. The other terminal 19 of the secondary current terminal on the rectifier 18 side of the welding transformer 6 is connected to the swing arm 3 through a conductive plate 20 and a shunt 21 as usual.

The pressure driving device 4 includes, for example, a motor, a screw shaft, and a nut. The pressure driving device 4 converts rotation of the motor into a linear motion of the pressure rod 22, and the linear motion is the pressure driving device. The oscillating arm 3 is caused to oscillate through a pressure rod 22 attached to the tip of 4. Further, welding electrodes 23 and 24 are attached to the tips of both arms 3 and 5, respectively.
The pressurizing drive device 4 may be a pressurizing drive device using fluid pressure composed of a cylinder and a piston.

  In the X-type welding machine having the above-described configuration, first, the pressure driving device 4 is driven to move the tip of the swing arm 3 downward, and a workpiece (not shown) is interposed between the electrodes 23 and 24. Hold. During the welding operation, as described above, the work is sandwiched between the electrodes 23 and 24, and the welding transformer 6 is operated while the swing arm 3 is kept in a pressurized state, thereby rectifying the welding transformer 6. The welding current thus conducted is conducted from the other terminal 19 of the secondary current terminal to the swing arm 3 through the shunt 21 as a direct current, and is sent from the welding electrodes 23 and 24 to the fixed arm 5, and thereafter the fixed arm. A current is conducted from 5 to one terminal 17 of the secondary current terminal of the welding transformer 6 connected to the gun bracket 2 by using the gun bracket 2 as a secondary conductor via the gun bracket 2.

  As described above, in FIG. 1, the fixed arm 5 is fastened and held in the lower and front two of the mounting holes 9, 9,... Formed in the gun bracket 2. .. Are tightened and held at the upper and two front holes 16, 16,.

  In order to narrow the lateral feel, the fastening to the two front sides of the mounting holes 9, 9,... And the two front sides of the mounting holes 16, 16,. By pushing in the front member 15 and shifting the tightening portion backward, the lateral feel becomes narrow.

  Further, in order to narrow the vertical feeling, the fixing portion 5 is pulled up with the tightening portion of the mounting holes 9, 9,. Whether the front member 15 of the swing arm 3 is pulled down or whether the fixed member 5 is pulled up and the front member 15 of the swing arm 3 is pulled down at the same time may be adopted corresponding to the surrounding environment.

  When the dimensions of the fixed arm 5 are changed, an appropriate hole among the mounting holes 9, 9,... May be selected so that the electrodes 23, 24 are matched.

  According to this device, at least three or more in the lateral direction are vertically arranged in each of the rear member 13 portion where the front member 15 of the swing arm 3 is held and the gun bracket 2 portion where the fixed arm 5 is held. A plurality of mounting holes 16, 16... Or mounting holes 9, 9,... Are formed in the direction, and at least two or more mounting holes 16, 16 selected from these mounting holes 16, 16. Since the arm is held by the fastening tool 7 inserted through 9, 9, 9, the fixed arm 5 can be selectively attached to the mounting holes 9, 9,... Further, since the front member 15 of the swing arm 3 can be selected and attached to the mounting holes 16, 16... Of the rear member 13 in the up / down direction or the left / right direction, the arm condition can be easily adjusted and the dimensions are different. Fixed The fixed arm 5 can be freely connected to any part of the gun bracket 2 and is assembled without any particular restrictions on the form of the X-type welder, so that the fixed arm 5 can be energized. There is no need for parts such as shunts and busbars, so the weight is reduced and the cost is reduced.

  Further, since the gun bracket 2 through which the secondary current is conducted is used as a secondary conductor of the welding current, the current conduction is good, and the gun bracket 2 has a larger volume and is easier to be cooled than a shunt or bus bar. The gun bracket 2 does not require a cooling device such as a water-cooled pipe because the conductive path is not overheated even by air cooling.

  In this embodiment, the DC current is supplied from the welding transformer 6 to the X-type welding machine 1. However, in this invention, the AC current is supplied from the welding transformer to the welding machine. Is also applicable.

  In FIG. 1, a plurality of shanks 25 having different lengths are prepared as the shank 25 to which the electrode 24 on the fixed arm 5 side is attached and the shank 26 to which the electrode 23 on the swing arm 3 side is attached.

  When the electrode 23 and the electrode 24 are wrinkled due to the change in the vertical feeling as described above, for example, when the fixed arm 5 is lifted, a short shank 25 is used, and when the swing arm 3 is pulled down, the electrode is short. A process such as using the shank 26 may be performed so that the electrodes 23 and 24 are matched.

It is a schematic block diagram of the X-type welding machine which concerns on this invention. It is AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X-type welding machine 2 Gun bracket 3 Oscillating arm 4 Pressurizing drive device 5 Fixed arm 6 Welding transformer 7 Fastening tool 9,16 Mounting hole 13 Oscillating arm rear member 15 Oscillating arm front member 17 For welding Transformer secondary current terminal 25, 26 Shank

Claims (2)

  In an X-type welding machine in which a pressure driving device for a rocking arm, a fixed arm, and a welding transformer that conducts a welding current to both the arms are held by a gun bracket, the rocking arm is pressure driven at the rear end. A rear member whose front lower end is pivotally supported by the apparatus and whose rear lower end is pivotally supported by the gun bracket and a rear member whose rear end is held by the rear member and an electrode member is attached to the front end are constituted by two parts. At least three or more front member mounting holes in the vertical direction and multiple stages of front member mounting holes in the vertical direction are formed in the portion of the rear member where the member is held, and inserted into at least two or more mounting holes selected from these mounting holes The front member is held by a tightened tool, and at least 3 or more fixed arm mounting holes in the vertical direction are formed in the part of the gun bracket where the fixed arm is held. At least selected The fixed arm is held by a fastener inserted into two or more mounting holes, one of the secondary current terminals from the welding transformer is connected to the gun bracket, and the gap between the welding transformer and the fixed arm is interposed via the gun bracket. An X-type welding machine characterized by having a conduction path for welding current. Adjust the position of the fixed arm side electrode to the vertical displacement of the fixed arm mounting position by the length of the shank, and adjust the vertical position of the swing arm mounting position to the swing arm side. The X-type welding machine according to claim 1, wherein the adjustment of the position of the electrode is made to correspond to the length of the shank.

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