A power tool includes a motor having an output shaft, an extensible member driven by the motor, a working assembly movable in response to contact with a distal end of the extensible member, a first sensor configured to detect a home position of the extensible member, a second sensor configured to detect rotation of the motor output shaft, and a controller in electrical communication with the first and second sensors. The controller is configured to drive the motor output shaft in a first rotational direction a predetermined number of revolutions counted by the second sensor, thereby displacing the extensible member from the home position. The controller is also configured to drive the motor output shaft in an opposite, second rotational direction to thereby return the extensible member until the home position is detected by the first sensor.

A power tool includes a motor having an output shaft, an extensible member driven by the motor, a working assembly movable in response to contact with a distal end of the extensible member, a first sensor configured to detect a home position of the extensible member, a second sensor configured to detect rotation of the motor output shaft, and a controller in electrical communication with the first and second sensors. The controller is configured to drive the motor output shaft in a first rotational direction a predetermined number of revolutions counted by the second sensor, thereby displacing the extensible member from the home position. The controller is also configured to drive the motor output shaft in an opposite, second rotational direction to thereby return the extensible member until the home position is detected by the first sensor.

A method for producing an oil supply pipe in which occurrence of cracks can be prevented at the time of forming a threaded portion in a metal pipe is provided. A method for producing an oil supply pipe in which a first rotating shaft 13, a first circumferential surface 14, and one first ridge portion 15 are provided, and in which, using a first forming roller 11 having the first ridge portion 15 spirally provided to have a length of less than one turn in a circumferential direction of the first circumferential surface 14 and a second forming roller 21 having a second rotating shaft 23, a second circumferential surface 24, and a second ridge portion 25 and the second ridge portion 25 spirally provided in a circumferential direction of the second circumferential surface 24, a threaded portion formed of a spiral protrusion is formed in an inner circumferential surface of a metal pipe by inserting the metal pipe to the second forming roller 21, disposing the first rotating shaft 13 and the second rotating shaft 23 so that they are parallel to each other, and pressing a material forming the metal pipe between the second ridge portions 25 using the first ridge portion 15 while rotating the first forming roller 11 and the second forming roller 21 is provided.

After holding a metal pipe 10 using a clamping die 5, a primary formed portion 11a corresponding to the preforming surface portion 5c is formed on the metal pipe 10 by pressing an end portion of the metal pipe 10 with a pressing die 6 in a direction of a cylinder center line C1. A final formed portion 11b is formed on the metal pipe 10 by moving an outer forming die 7 to press an outer circumferential surface of the metal pipe 10 with the outer forming die 7 after aligning a rib portion 7c with the primary formed portion 11a, while moving an inner forming die 8 to press an inner circumferential surface of the metal pipe 10 with the inner forming die 8 after aligning a recessed groove portion 8c with the primary formed portion 11a.

After holding a metal pipe 10 using a clamping die 5, a primary formed portion 11a corresponding to the preforming surface portion 5c is formed on the metal pipe 10 by pressing an end portion of the metal pipe 10 with a pressing die 6 in a direction of a cylinder center line C1. A final formed portion 11b is formed on the metal pipe 10 by moving an outer forming die 7 to press an outer circumferential surface of the metal pipe 10 with the outer forming die 7 after aligning a rib portion 7c with the primary formed portion 11a, while moving an inner forming die 8 to press an inner circumferential surface of the metal pipe 10 with the inner forming die 8 after aligning a recessed groove portion 8c with the primary formed portion 11a.

A power tool includes a motor having an output shaft, an extensible member driven by the motor, a working assembly movable in response to contact with a distal end of the extensible member, a first sensor configured to detect a home position of the extensible member, a second sensor configured to detect rotation of the motor output shaft, and a controller in electrical communication with the first and second sensors. The controller is configured to drive the motor output shaft in a first rotational direction a predetermined number of revolutions counted by the second sensor, thereby displacing the extensible member from the home position. The controller is also configured to drive the motor output shaft in an opposite, second rotational direction to thereby return the extensible member until the home position is detected by the first sensor.

An apparatus has a corrugating device through which a pipe is moved producing corrugation in the circumferential direction of the pipe by rotation. The corrugating device has a corrugator head which is rotatable about its axis, and a hollow shaft on which the corrugator head is firmly fitted and via which the corrugator head is driveable in rotation. A vibration measuring means is connected mechanically to the corrugating device for automatically detecting mechanical vibrations of the rotating corrugating device. The vibration measuring means simultaneously detects measured values for vibrations of the hollow shaft which are characteristic of the state of the hollow shaft bearings and measured values for vibrations of the corrugator head which are characteristic of the balancing thereof. A display apparatus displays the measured values detected thereby and/or evaluation results based on the measured values is furthermore provided.

An apparatus has a corrugating device through which a pipe is moved producing corrugation in the circumferential direction of the pipe by rotation. The corrugating device has a corrugator head which is rotatable about its axis, and a hollow shaft on which the corrugator head is firmly fitted and via which the corrugator head is driveable in rotation. A vibration measuring means is connected mechanically to the corrugating device for automatically detecting mechanical vibrations of the rotating corrugating device. The vibration measuring means simultaneously detects measured values for vibrations of the hollow shaft which are characteristic of the state of the hollow shaft bearings and measured values for vibrations of the corrugator head which are characteristic of the balancing thereof. A display apparatus displays the measured values detected thereby and/or evaluation results based on the measured values is furthermore provided.

One embodiment of a brake press for bending and forming sheet metal is disclosed. The brake press includes a movable frame including an upper cross member and a lower cross member and a stationary press positioned between the upper and lower cross members. A punch edge secured to the upper cross member moves towards and away from a die positioned on the stationary press to bend a sheet metal workpiece into a desired configuration, In some embodiments, a hydraulic control assembly provides precise and accurate control of the brake press.

One embodiment of a brake press for bending and forming sheet metal is disclosed. The brake press includes a movable frame including an upper cross member and a lower cross member and a stationary press positioned between the upper and lower cross members. A punch edge secured to the upper cross member moves towards and away from a die positioned on the stationary press to bend a sheet metal workpiece into a desired configuration, In some embodiments, a hydraulic control assembly provides precise and accurate control of the brake press.