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Title:
LASER BEAM MACHINE
Document Type and Number:
Japanese Patent JP3187147
Kind Code:
B2
Abstract:

PURPOSE: To prevent the collision of a top end of nozzle and an object to be worked by maintaining the present distance within a definite time when an electrostatic capacity over than the standard value is detected with a height sensor.
CONSTITUTION: A nozzle top end 5C of a torch part 5 of a laser beam machine 1, that is, a height sensor nozzle part 9 controls by changing an electrostatic capacity value generated due to the distance with the object to be worked 8 into a voltage value with a signal treatment circuit 15. When a plasma, etc., is generated during working with laser beam, in the electrostatic capacity obtained with the central electrode 9b of a torch part 5, if its value is rapidly detected over the standard range value, the output of the present value hold circuit 23 is supplied to the Z axis servo motor 6 with a delay timer 21 within the prescribed time. Therefore, during the prescribed time that the plasma is to be finished, the distance of the object to be worked 8 and the nozzle top end 5C can be kept in the present state.


Inventors:
Fukuda, Masaki
Application Number:
JP1992000191293
Publication Date:
July 11, 2001
Filing Date:
June 26, 1992
Export Citation:
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Assignee:
TOYO DENSHI KK
International Classes:
B23K26/00; B23K26/046; (IPC1-7): B23K26/00
Attorney, Agent or Firm:
佐々木 功 (外1名)



 
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