Thread clamping fixture

In the actual production and maintenance process, it is often necessary to machine some parts with external threads. In the production practice, the ordinary method has been used for processing, but there are many problems: 1 directly clamping the external thread, easy to clip Injury the external thread part, affecting the thread fit. 2 When the copper lining is indirectly clamped, the positioning accuracy is difficult to control and the production efficiency is low. 3 screw the external thread into the internal thread of the blind hole, and work

Overshot Assembly

Overshot go into the heart of the drill pipe, the slider move up, make the tube socket head can be inserted into the center, when on the slider move up tight, using friction lift drill, remove loose again after the slider, by means of the connection string to slide along the block should tighten, set aside the center pipe, but in front of the salvage must first determine the bit in the bottom of the hole position, can be in a thin plate with bolts tight end of drill pipe, Drop the drill pipe to the bottom of the hole and press it on the drill bit. After waiting for a moment, it is proposed that the relative position of the drill bit at the bottom of the hole and the center of the rotary plate of the drill can be determined by observing the indentation left by the center pipe of the drill bit on the board, and then move the drill or rotary plate so that the center of the rotary plate is directly in front of the center pipe of the injured head, so as to ensure that the fishing device can be inserted into the center pipe accurately.

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