APPARATUS FOR AUTOMATICALLY WELDING AND METHOD FOR CONTROLLING THE SAME

PURPOSE: An automatic welding apparatus and a method for controlling the same are provided to prevent an error generated in measuring pulling capacity by obtaining pulling capacity with measuring pressure change until regular distance, thereby increasing the reliability of a welding process. CONSTITUTION: An automatic welding apparatus includes a body part(110) having a clamp(111) clamping a fixed plastic pipe and a conveyance plastic pipe, a cylinder(112) conveying the conveyance plastic pipe to the fixed plastic pipe with predetermined oil pressure, and a distance measuring part(114) sensing the conveyed distance of the plastic pipe; a hydraulic apparatus applying predetermined pressure to the cylinder and having linear comparison characteristic of hydraulic pressure and time according to the quality of the plastic pipes; a chamfering element(130) chamfering both ends of the plastic pipes and having a chamfering blade(132) having predetermined angle from the center axis to the outside; a heating apparatus(140) heating both ends of the plastic pipe at the settled temperature band, and a compensation circuit(144) sensing the temperature for preventing overheat; and a welding control apparatus(100) controlling the operation of the hydraulic apparatus, the chamfering element, and the heating apparatus to melt and unite the plastic pipes in response to the preliminarily set welding parameter and a welding operation signal, storing the result, and checking the inferiority of a welding work process according to the signal outputted from the distance measuring part.