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Welding lower electrode device

A technology of electrode device and electrode clamp, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of inaccurate stroke judgment, stroke position error, spring characteristic change, etc. Eclipse effect

Inactive Publication Date: 2010-10-20
SMK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the technique described above, if a device such as an air cylinder unit is used as a device for urging the rod upward, there is a problem that the device becomes large and the device configuration is expensive.
On the other hand, if a spring or the like is used to urge the rod and the positioning pin, there is a problem that although the structure of the device becomes cheaper, the load on the spring becomes larger each time the rod and the positioning pin repeat the lifting stroke. The characteristics will change, and an error will occur in the detection of the stroke position, so that the stroke cannot be judged accurately

Method used

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Embodiment Construction

[0028] Embodiments of the present invention will be described with reference to the drawings.

[0029] The lower electrode device for welding according to the present invention is characterized in that the structure of the device is simplified to achieve compactness of the whole device, and it is possible to accurately judge defects during welding. The air cylinder unit and other components are used to assist the spring force by the air pressure used to prevent foreign matter from intruding into the electrode clamp tube.

[0030] That is, if figure 1 As shown, the lower electrode device 1 for welding of the present invention includes an electrode clamping tube 3 screwing the lower electrode 2, a rod 4 that can be lifted and lowered inside the electrode clamping tube 3, and a spring 5 that applies force to the rod 4 upwards. A water supply and drainage unit 6 is arranged at the lower end of the above-mentioned electrode clamp tube 3, and the water supply and drainage unit 6 is...

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Abstract

An object of the present invention is to reduce the size of an entire device by simplifying a device configuration, and also accurately measure the stroke position of a rod. A lower electrode 2 is mounted on an upper portion of an electrode holder tube 3. A rod 4 that is vertically movable within the electrode holder tube 3 is divided into a first rod 4a and a second rod 4b. The rod 4 is urged upward by a compressed spring 5 that is interposed between a spring receiving seat 14 fixed to the upper end surface of the second rod 4b and an insulating adapter 7. Pressurized air supplied from a pressurized air supply pipe 15 to assist the urging force is received by a pressure receiving portion on the lower surface of the spring receiving seat 14, thereby assisting the spring 5 to urge the rod 4 upward. A magnetic sensor 10 is disposed below the second rod 4b, and a lower end portion of the second rod 4b is directly connected to a detector 17 of the magnetic sensor 10.

Description

technical field [0001] The present invention relates to a welding lower electrode unit having a simple and compact structure, which is used in combination with an upper electrode unit when, for example, welding nuts, bolts, etc. to a plate-shaped workpiece. Background technique [0002] Conventionally, as a lower electrode unit used in combination with an upper electrode unit for welding nuts and the like to a plate-shaped workpiece, there is known a technique in which positioning pins are moved up and down in the electrode holder and a rod that is urged upward is arranged. On the other hand, a perforated plate-shaped workpiece, nuts, etc. are placed on the lower electrode, and the positioning pins are passed through each hole to protrude upward. By lowering the upper electrode and pressing the nut, etc., the plate-shaped workpiece and the nut, etc. In close contact, by detecting the up and down stroke position of the rod at this time, defects during welding, defects in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/04
CPCB23K11/0053B23K35/0288B23K35/0205
Inventor 日高胜人
Owner SMK CO LTD
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