초록 ▼

Deviations from desired shape of plasticly deformable objects are corrected within narrow tolerances by a method wherein the real shape of the object is sensed, whereupon the deviation from the desired shape is determined and a correction length corresponding to the deviation is defined, after which

Deviations from desired shape of plasticly deformable objects are corrected within narrow tolerances by a method wherein the real shape of the object is sensed, whereupon the deviation from the desired shape is determined and a correction length corresponding to the deviation is defined, after which the object in a straightening operation is subjected to a shape correction corresponding to the correction length. At least one measurement transmitter (4) is disposed to sense the real shape of the object (2) and deliver a corresponding output signal which is fed to a unit (6,8,9) for comparison with information about the desired shape of the object stored in the unit for determining the deviation, the unit delivering an output signal defining a correction length corresponding to the deviation, the output signal controlling a straightening device (12,14,16,18,20,22,24) to carry out a correction of the shape of the object corresponding to the correction length. The method and the apparatus are adaptive as the shape of the object (2) is sensed after the shape correction and the relationship between correction length and deviation in the shape is modified in response to a possibly remaining deviation in the shape.

대표청구항 ▼

An apparatus for correcting deviation of a plastically deformable object from a desired shape, said apparatus comprising; (A) at least one measurement transmitter for sensing the real shape of an object and delivering a corresponding output signal; (B) a data processing unit connected to said measur

An apparatus for correcting deviation of a plastically deformable object from a desired shape, said apparatus comprising; (A) at least one measurement transmitter for sensing the real shape of an object and delivering a corresponding output signal; (B) a data processing unit connected to said measurement transmitter for receiving said output signal; (C) a memory connected to said data processing unit and adapted to store a predetermined relationship between deviation in the shape and correction length, said data processing unit being adapted to store information about the desired shape of the object for comparison of the sensed shape of the object represented by said output signal from said measurement transmitter with the desired shape of the object for determining the deviation in the shape, and from said relationship stored in said memory determining the size of the correction length corresponding to said determined deviation of the shape, and delivering a corresponding output signal; (D) and a straightening device connected to said data processing unit for receiving said output signal therefrom and comprising at least one straightening member to carry out a corrective forming of the object determined by said correction length, said straightening member comprising a hydraulicly driven straightening shoe arranged between two supports opposite to said shoe and separated in the longitudinal direction of the object, said supports being displaceable in the longitudinal direction of the object and said displacement of said supports being controllable from said data processing unit to positions of said supports along the longitudinal direction of the object which are optimal for the shape correction in question; said measurement transmitter being arranged to sense the real shape of the object after the straightening operation and deliver to said data processing unit a second output signal for determining possibly remaining deviation in the shape of the object after the straightening operation, said data processing unit being arranged to then form the difference between the deviation in the shape before and after said straightening operation and change said predetermined relationship stored in said memory by multiplication of the actual correction length by a factor reciprocally proportional to said difference.