Contact chip regenerating device and contact chip regenerating method

Abstract

A device (1) is provided with a first die (2), a second die (3), and a press machine (4). The second die (3) has a plastic processing hole (3a) in which a core metal (3f) is arranged on a hole center line (C1). The plastic processing hole (3a) has an inner circumferential surface on which three ridges (3b) are provided at regular intervals in the circumferential direction of the hole center line (C1). As the first and second dies (2), (3) are moved closer to each other, the core (3f) is inserted into the guide hole (10a) of the contact chip (10) and the ridges (3b) cause the tip-end side of the contact chip (10) to be pressed and plastically deformed until coming into contact with the core (3f).

Description

technical field [0001] The present invention relates to a contact tip regeneration device and a contact tip regeneration method for regenerating a contact tip whose tip-side inner peripheral surface of a guide hole for guiding a welding wire is in a worn state after repeated arc welding. Background technique [0002] Conventionally, an arc welding torch is used for arc welding, and a copper contact tip for supplying a welding current to an object to be welded via a welding wire is attached to the torch. The contact tip is in the shape of a slender rod, and a guide hole for guiding the welding wire during welding is formed through the center line of the contact tip. [0003] However, if arc welding is repeated, the tip-side inner peripheral surface of the guide hole on the contact tip wears due to friction with the welding wire, causing the hole diameter of the guide hole on the tip-side of the contact tip to increase. In this way, the position of the welding wire in the gui...

AI Technical Summary

Problems solved by technology

[0003] However, if arc welding is repeated, the tip side inner peripheral surface of the guide hole on the contact tip is worn due to friction with the welding wire, resulting in an increase in the diameter of the guide hole on the tip side of the contact tip.

In this way, the position of the welding wire in the guide hole is easy to change during arc welding, and the contact state between the welding wire and the inner peripheral surface of the guide hole is unstable, so the welding current flowing from the contact tip to the object to be welded through the welding wire becomes unstable. This in turn will lead to a decrease in welding quality

Therefore, the contact tip that has undergone repeated arc welding is usually removed from the welding torch and replaced periodically, but there is a problem that the cost of the parts increases

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