Method of and means for spacing control of plasma arc torch

Electric heating – Metal heating – By arc

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

219124, B23K 910

Patent

active

040177076

ABSTRACT:
A method of automatically maintaining a selected spacing for a plasma arc torch from a workpiece is disclosed which takes advantage of the fact that at any given setting of a plasma arc power supply the current in the arc varies inversely and the voltage across the arc varies directly in relation to the spacing of the plasma arc torch from the workpiece. According to such method, the current and voltage of the power supply for the torch are sensed in operation, a signal representative of each comparable to the other is generated and one of such signals is inverted with respect to the other of such signals. The signals are then summed with each other and with a third comparable selectively adjustable signal and the difference signal is used to control the spacing of the torch from the workpiece. A preferred embodiment of the control means for practicing the invention is described as included in a commercial plasma arc apparatus and includes means for shutting down the apparatus if an extreme condition occurs such as reaching the end of the workpiece or extinguishment of the arc. Means for protecting the control means during ignition of the arc, for enabling manual control of the plasma arc torch and for interfacing between the control means according to this invention and prior art control means are disclosed.

REFERENCES:
patent: 3233076 (1966-02-01), Vilkas
patent: 3262006 (1966-07-01), Sciaky et al.
patent: 3443057 (1969-05-01), Allen et al.
patent: 3538299 (1970-11-01), Daggett
patent: 3564333 (1971-02-01), Cramer et al.
patent: 3596050 (1971-07-01), Tikijian
patent: 3777115 (1973-12-01), Kazlauskas et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of and means for spacing control of plasma arc torch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of and means for spacing control of plasma arc torch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and means for spacing control of plasma arc torch will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1282609

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.