Thread tapping machine tool

Details Thread tapping machine tool Thread tapping machine tool

1986-03-14

1988-04-26

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Means to drive tool

Including means to move tool along tool-axis

10139R, 408112, B23G 118, B23G 308

Patent

active

047401206

ABSTRACT:
A thread cutting work station includes a carriage assembly mounted on guideways for guided movement under the control of a linear actuator between an initial, home position and a forward position for cutting threads in or upon a workpiece. A collet is connected to a drive motor and carries a tap for thread cutting. In operation, the linear actuator accelerates the carriage assembly from the initial, home position along the guideways towards the workpiece with the rotating tap entering the to-be-threaded bore to initiate the thread cutting operation with the subsequent feed rate controlled by the rotating tap. After completion of the thread cutting step, the drive motor is reversed to withdraw the tap from the threaded bore, and the linear actuator is controlled to rapidly move the carriage assembly to its initial position. The use of a separate linear actuator to advance and retract the carriage assembly allows for the rapid advance and retraction of the tap to and from the to-be-threaded bore to increase overall efficiency.

REFERENCES:
patent: 2902890 (1959-09-01), Staples
patent: 2930261 (1960-03-01), Emrick
patent: 3389413 (1968-06-01), Van Den Kieboom
patent: 3564970 (1971-02-01), Larsen
patent: 4179231 (1979-12-01), Hadden

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