Taiyuan Huaxin Cheng you elaborate production of oil casing pipe welding unit should pay attention to the problem of strength and toughness in the weld is also a big problem, hydraulic press manufacturer, the general production of oil casing pipe unit, the toughness of the weld metal toughness by the mother, the chemical composition of the base material and welding technology of. When the reduction in raw material strip in C, S, P, Cr element content, etc., can be improved weld toughness; when controlling the welding 程中亮 line width, angle and streamline the welding process content of nonmetallic inclusions, also It can significantly improve the toughness of welds; in addition, by controlling the cooling pipe hot stretch reducing after the oil casing may improve the welding seam and the pipe body strength and toughness in other regions. Strict quality control strip edge and welding process is the main way to solve the weld gray spots, before the adoption of the weld heat treatment and hot stretch reducing whole body heating can reduce the tendency pipe weld seam tubing and casing appear gray spots. Gray Leaf Spot Weld: Weld gray leaf spot is present in the plane of defective weld fusion line, welded pipe production fracture when the general was flat gray porphyritic, hydraulic press, usually round, oval or elongated. Gray leaf spot on the chemical composition of the weld zone, morphology, stress distribution is large, seriously affecting the mechanical properties of the oil casing. The main factors of gray leaf spot welds are welding the chemical composition of the base material, welding temperature, welding speed, extrusion amount, before the opening angle and welding strip edge shape and surface quality. Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. is a high-tech enterprise specialized in the design, development and manufacture of equipment Longitudinal spiral welded pipe equipment, cold-formed steel equipment, sheet and pipe finishing equipment and high-precision slitting line equipment. Taiyuan Huaxin Cheng for you to resolve high-frequency welded pipe welding position sensor and impedance frequency welded Welding inseparable impedance sensor and the use of hydraulic machine price, both in welding are pivotal position in the welding Technology is both the positions of the sensor and resistor relevant, as long as the right position, you can both play a good role. Today the rich Ruiwo for everyone to talk about the position sensor impedance placed it! The first is the high-frequency welding pipe machine placement resistor is known, resistor that is the magnet, hydraulic machine parts, resistor placement not only have a significant impact on the welding speed, and the welding quality is also affected. Welding speed welding technology is one of the important three elements, the impedance can be said to be the pivotal position. According Huaxin Cheng proved the best position that is placed inside the sensor impedance is below tube, which coincides with the center line of the head and squeeze rollers or the molding direction adjustment 20 ~ 40mm, can increase the back impedance tube, reducing its circulating current losses and improve the welding voltage. When using single-turn sensor, the sensor hang on each side of a small resistor, so as to enhance the welding field, also makes the tube edge proximity effect enhanced welding speed can be increased 4 ~ 5m per minute. This is due to the impedance of the front end position just at the centerline of squeeze rollers, flaring strength and flattening strength is best. When more than a squeeze roll toward the center line sizing mill side, flaring intensity and strength decreased partial pressure. But not at the center line of the side of the molding machine, but also to reduce the strength of the weld. Hydraulic press manufacturer | Huaxin Cheng Electrical and Mechanical Services (certified) | hydraulic press provided by Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. (www.tyhxc.com) (www.tyhxc.net) is Jinzhong, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In Huaxin Cheng electromechanical leadership with the staff warmly welcome all inquiries negotiations to create a better future Huaxin Cheng electromechanical.