Method for controlling an intermittently operating screw tool

Details Method for controlling an intermittently operating screw tool Method for controlling an intermittently operating screw tool

2006-02-21

2006-02-21

Noori, Max (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

Reexamination Certificate

active

07000486

ABSTRACT:
In the method for controlling an intermittent screw process first a torque mode (DMM) is applied in which the torque is continuously measured. Upon attainment of a pre-torque (MF) a rotation angle mode (DWM) is carried out in which the rotation angle is measured. Proceeding from the rotation angle α=0 (corresponding to the pre-torque (MF)) the rotation angle (α) is counted up during each stroke. In this connection that torque (MHE) is stored which has been reached at the end of the stroke. During the next stroke the angle (α) is continued to be counted only when the torque (MHE) at the stroke end of the previous stroke has been reached again. Upon attainment of a target angle (αz) the screw process is terminated.

REFERENCES:
patent: 5589644 (1996-12-01), Becker et al.
patent: 5631823 (1997-05-01), Layer et al.
patent: 5862724 (1999-01-01), Arata et al.
patent: 5868208 (1999-02-01), Peisert et al.
patent: 6070506 (2000-06-01), Becker
patent: 6167606 (2001-01-01), Mueller et al.
patent: 6167788 (2001-01-01), Schonberger et al.

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