Electric heating – Metal heating – For bonding with pressure
Patent
1993-07-13
1994-05-31
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
B23K 920
Patent
active
053171233
ABSTRACT:
The invention keeps welding time constant by appropriately setting the time of stud descent determined by the de-energization of lift means so as to obtain stable quality of welding. A stud welding machine has a welding gun having a collet to hold a stud and a lift coil to lift the stud from a base material. A control device is connected to a power source and the welding gun and functions to supply power from the power source to the welding gun to produce a pilot arc and later a main arc. The control device energizes the lift coil to lift the stud to a predetermined height to produce the pilot arc and the main arc, and it de-energizes the lift coil so as to bring the stud into press-contact with the base material to make the weld. The control device has a voltage detector to detect that the stud is in press-contact with the base material and to stop the power supply from the power source to the welding gun upon receipt of a press-contact signal from the detector. The control device is provided with a counter to measure descent time from the de-energization of the lift coil to the press-contact of the stud with the base material, and a calculator to calculate an average value of descent times measured N times. A sequence controller adjusts the timing of de-energization of the lift coil by using the calculated average value.
REFERENCES:
patent: 4297560 (1981-10-01), Netzsch
patent: 4988842 (1991-01-01), Van Allen
patent: 5030815 (1991-07-01), Glorioso
Emhart Inc.
Murphy Edward D.
Shaw Clifford C.
LandOfFree
Controller for a stud welding machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controller for a stud welding machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller for a stud welding machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1629045