Process and equipment for the production of semi-finished sections of accurate weight or volume for cold working or hot forming
AssigneeRolf Peddinghaus
InventorsJoachim Wepner, Jochen Zuhlke
Life of this patent
Estimating the term…
Abstract
A process and apparatus for producing sections of accurate weight or volume which includes the providing of a computer which receives various signals including the length, weight and density of a sheared off section and in response to such conditions varies the position of a length stop to insure that sections of accurate weight and volume are continuously obtained. The length stop mechanism is regulated by controlling the movement of a plurality of clamping devices which operate in conjunction with the axial movement of the material to be severed. The clamping devices are hydraulically operated.
Claims10
Equipment for shearing off semi-finished sections, such as billet sections, to close weight tolerances for subsequent cold working and hot forming, from an elongated workpiece by means of shears for semi-finished sections, said equipment comprising:
- a frame;
- a length stop movably mounted on said frame for engaging the end of the workpiece to be severed;
- servo-motor means for adjusting the location of said length stop with respect to the end of the workpiece;
- an hydraulically actuated restraining means for locking said length stop against movement relative to said frame after adjustment and for releasing the length stop prior to the next adjustment, respectively;
- hydraulic control circuit means for actuating said restraining means to alternately lock and release the length stop as required during the work cycle;
- weighing means for determining the weight of the immediately preceding sheared off section;
- computer means for controlling the equipment during the severing process to adjust the location of said length stop with the servo-motor, as a function of the actual weight of the immediately preceding sheared-off semi-finished section, to a first length corresponding to the set weight of the semi-finished section;
- said computer means including first means for determining said first length by digital computation from parameters including (1) the difference between the fed values for the set weight and the actual weight and (2) the fed values for (a) the cross-sectional dimensions and (b) the density of the material of the workpiece;
- said computation including a correction factor for the cross-sectional dimensions;
- and said computer means including second means for operating said hydraulic control circuit means for actuating said restraining means in a given time interval and corresponding to the work cycle.
Dependencies are inferred from the claim text.