Honda Motor Co., Ltd.

Yohei Teragaito

Hiroshi Miwa

Yoshito Otake

Takuya Furuno

Takuya Hino

A welding gun includes a proximity restricting mechanism that is provided between a shaft and a cover member in a manner to surround the shaft and to be displaceable relative to the shaft in an axial direction in accordance with expansion and contraction of the cover member, and that restricts the cover member from approaching too closely the shaft.

Resistance welding apparatus

A welding gun includes: a moving mechanism portion (ball screw mechanism) for moving a movable electrode back and forth; a motor that includes a rotor and drives the moving mechanism portion to move the movable electrode back and forth; and a brake mechanism that prevents rotation of the rotor during a braking operation, wherein the brake mechanism includes an annular brake disc that is attached to an outer peripheral surface of the rotor and rotates integrally with the rotor, and a clamping portion that prevents rotation of the brake disc by clamping the brake disc during the braking operation.

In the present invention, while a welding current is applied with respect to a laminate body comprising thick metal plates and thin metal plates, a first welding pressure (F) with respect to the laminate body from an upper tip contacting the metal plate and a second welding pressure (F) with respect to the laminate body from a lower tip contacting the metal plate are changed relative to each other. Specifically, F&#x3c;Fin a first step which is an initial period of welding, F=Fin a second step which is an intermediate period of welding, and F&#x3e;Fin a third step which is a final period of welding.

Spot welding method and device

To provide a welding gun capable of improving the durability by effectively bearing the load in the thrust direction, and capable of providing a heavyweight and large-sized movable gun arm, even in a small-sized main body unit. A welding gunof a guide groove type is provided with a thrust direction guide mechanism including: two guide pinsandprovided to an arm holderin an integrated manner by penetrating first and second guide groovesand; bracketsandbeing fixedly provided to the end portions of the guide pinsand, and having a length sufficient to traverse the first and second guide groovesandin a direction orthogonal to the axis line of the guide pinsand; and thrust bearing membersandbeing provided to the end portions of the bracketsand, abutting on a side plateof a gun body, so as to be movable along the first and second guide groovesand

Welding gun

A welding gun equipped with a retaining unit, which includes a first retaining member and a second retaining member, and retains a stationary gun arm and a movable gun arm. A retaining hole for retaining the stationary gun arm, guide grooves for insertion of rolling members provided on an arm holder that retains the movable gun arm, connecting member insertion holes into which connecting members connecting the first retaining member and the second retaining member are inserted, and a retained member insertion hole for inserting a retained member retained by a moving member that moves the retaining unit to a welding operation location, are formed in the first retaining member and the second retaining member, and the regions where these components are formed are set as thick-walled regions having a greater thickness than other regions. Thus, adequate rigidity is ensured while avoiding an increase in weight.

A protective cover used in a guide groove-type welding gun is provided with: a cover body into which a movable gun arm is inserted, said cover body being of a flame-retardant fabric, covering at least a gun body, having an open-ended tubular shape, and being capable of following changes in shape; the first strings that can allow the mobile gun arm to project and maintain the upper end opening in a narrow-mouthed state; and the second string that can allow the fixed gun arm to project and maintain the lower end opening in a narrow-mouthed state. Thus, sputter depositions and the like that occur during welding are reliably prevented from penetrating the gun body, further improving the durability of the welding gun.

Growing community of inventors

Tochigi-ken, Japan

Yohei Teragaito