A kind of stud welding machine
Technical field
The utility model relates to electric welding machine, specifically, relates to a kind of stud welding machine that is used for the body of a motor car welding.
Background technology
Be used for fixing clue at body of a motor car, need welding screw on the different position of vehicle body, generally on vehicle body, have 30~300 not wait, and distribution does not have rule, kind many yet, the situation that exists omission in welding is many, causes and does over again, and has increased production cost.
For addressing the above problem, adopt desk checking at present, in order to ensure quality, increase amount of testing, but still depositing the omission phenomenon.
The utility model content
Technical problem to be solved in the utility model is at the deficiencies in the prior art, to provide a kind of stud welding machine that can detect welding screw quantity automatically.
For solving the problems of the technologies described above, the technical solution of the utility model, a kind of stud welding machine, comprise welding machine main frame, welding machine controller, welding gun with the welding machine controller is connected is characterized in that: be equipped with the counting and detecting device that detects welding screw quantity between described welding machine controller and welding plate.
A kind of stud welding machine, described counting and detecting device by programmable controller (PLC), be located at forming of welded piece below near switch, alarm, SR, the input of described programmable controller is respectively with welding machine controller, SR be connected near switch, and its output is connected with alarm.
A kind of stud welding machine adopts said structure, is equipped with counting and detecting device between described welding machine controller and welding plate.Welding machine controller output weld pulse signal is given programmable controller.Owing to counter in the programmable controller and the stud welding numerical value of setting in advance compare, detect welding screw quantity automatically, when the detection number equated with setting quantity, counting and detecting device did not feed back; Fashionable when discrepancy of quantity, alarm sends leakage welding signal, thereby realizes the quality control automation, and the control reliability reaches 100%, has improved the uniformity that vehicle body is made.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is a kind of stud welding machine structural representation of the utility model;
In Fig. 1,1, the welding machine main frame; 2, welding machine controller; 3, welding gun; 4, double-screw bolt; 5, welding plate; 6, programmable controller; 7, near switch; 8, SR; 9, alarm.
The specific embodiment
As shown in Figure 1, a kind of stud welding machine comprises welding machine main frame 1, and welding gun 3 is connected with welding machine main frame 1 by welding machine controller 2, is equipped with the counting and detecting device that detects welding screw quantity between described welding machine controller 2 and welding plate 5.Described counting and detecting device, by programmable controller 6, be fixed on and be positioned at welding the forming of plate 5 belows on the welding tooling near switch 7, alarm 9, SR 8, the input of described programmable controller 6 respectively with welding machine controller 2, be installed on the welding post SR 8 and be connected near switch 7, its output is connected with alarm 9.
Before the welding, to weld on the plate 5 needs in the welding screw 4 quantity input programmable logic controllers 6, in the time will weld plate 5 and be placed on the welding tooling, and welding plate 5 and close near switch 7, make near switch 7 and signal to programmable controller 6, programmable controller 6 begins to prepare counting.When welding gun 3 welding screws 4, welding machine controller 2 sends a pulse signal and gives programmable controller 6 as count signal, and welding gun 3 every work are once sent a count signal.After welding finishes, remove welding plate 5, near the signal condition change of switch 7 outputs, the counter in the programmable controller 6 compares with the technology numerical value of setting in advance, and quantity equates that counting and detecting device does not feed back; When discrepancy of quantity fashionable, programmable controller 6 output signals, alarm 9 begins to report to the police, and reminds the operator, this welding plate 5 exists that to leak weldering defective, the operator presses SR 8, closes alarm 9.