Nittan Valve Co., Ltd.

Takehiro Okuno

Ryo Onose

Koichi Homma

Koji Sakane

Onose Ryo

A machining apparatus capable of drilling a long workpiece from an end surface of a diameter-expanded part and drilling a short workpiece from an end surface of a stem part without inverting orientation of a collet and a sleeve in a chuck device is provided, as well as a method of using the same, and a chuck device for the machining apparatus. A deep hole drilling machine and a chuck device are included with a sleeve and a collet included inside the chuck device, and the collet and the sleeve each have both end openings opened toward the outside of the chuck device. The opening on one end side of each of the sleeve and the collet is directed to the deep hole drilling machine, and the collet is disposed on the other end side of the sleeve.

Chuck device

To provide a method of friction welding and an apparatus of friction welding in which a length of time for manufacturing one product is reduced as much as possible regardless of the dimension errors of works. The fast forwarding distance Lxis calculated for the fast forwarding by using the results of measuring the dimensions of works W, Wunder the condition of the constant slowly forwarding distance Lx, Thereby, for the work of a legitimate dimension and even for the work having a dimension smaller than the legitimate dimension, the elongation of the slowly forwarding distance is prevented compared with the work having the longer dimension than the legitimate dimension, and the relative proportion of the fast forwarding distance Lxis increased by making shorter the specified slowly forwarding distance.

Method of friction welding and apparatus of friction welding

A burring apparatus for a friction welding machine comprises a clamp unit provided at the front end of a horizontal main spindle, for holding work piece Wcoaxial with the main spindle, a clamp unit provided at the front end of a slide movable to and away from the main spindle in the direction of the axis of the main spindle and a doughnut-shaped cutter for shearing off a burr. Work piece Wis moved forward together with the slide until work piece Wcomes into contact with work piece Wso that the mated ends of work pieces Wand Ware friction welded together to form a joint work piece W. The burr formed on the jointed work piece W is sheared off by the cutter. The jointed work piece W is then liberated from the main spindle.

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Hadano, Japan

Takehiro Okuno