44 results about "Weld quality assurance" patented technology

The invention relates to a cladding defect repair welding process of a stainless steel composite plate, which belongs to the technical field of metal welding, and specifically relates to a cladding defect repair welding process of a stainless steel clad plate aiming at the cladding defect of a stainless steel clad plate. It is characterized in that: remove the defective cladding material; remove the base material, so that a step is formed between the base material and the cladding material; the groove surface and the bottom of the weld are transitioned with rounded corners; the base welding is welded by electrode arc welding; Welding of the transition layer adopts short-arc operation; welding of cladding and cover surface adopts electrode arc welding. It overcomes the defects that cracks are easy to appear in surfacing welding, and the welding heat process has adverse effects on the performance of the heat-affected zone of the base metal. It can effectively avoid cracks at the interface between the base material and the cladding material, ensure the height of the base weld, and will not damage the cladding. It is beneficial to ensure the welding quality of cladding.

The invention relates to a butt welding device for stamping plate parts. The butt welding device for the stamping plate parts comprises a welding platform, a pair of press disks, a pair of limiting columns and a welding device, wherein the press disks and the limiting columns are arranged at the transverse ends of the welding platform, and the welding device is arranged on one side of the weldingplatform. The limiting columns comprise at least a pair of guide wheels horizontally opposite arranged; and the press disks comprise rectangle matrixes and press blocks extending outward from the sides of the matrixes, and the press blocks of the pair of press disks are opposite to each other. According to the butt welding device of the stamping plate parts, the two parts stamped out of the largerparts separately are facilitated to be welded, the welding quality of the welding place is ensured, and the actually seamless joint after welding is ensured; meanwhile, the shape of the periphery ofthe welding place is ensured to be aligned, and deforming does not appear due to the residual stress of welding; and meanwhile, the functions of automatic alignment and welding are achieved, and the production efficiency is improved. Through the beneficial effects, the integral forming of the large stamping parts after separating and stamping can be realized, and the cost of mold tools can be reduced and the quality of products produced can be improved at the same time.

The invention relates to a processing method for a ball valve in a refrigeration system, comprising the following steps: firstly, sending the processed copper connecting pipe, valve body and valve cover into a special welding system for standby; The valve body and valve cover are preheated. After the preheating is over, the welding torch and the flame nozzle are used for welding. After the welding is completed, three cooling water pipes are used to spray cooling water to gradually cool the welding place. The cooled workpiece is taken out manually, and the welding of the valve body, valve cover and copper connection pipe is completed. The advantage of the present invention is that: the processing method of the present invention is based on a special welding system, and then cooperates with the temperature and time of preheating, and the temperature and time of welding, so as to improve the welding quality and ensure the stability of welding. The temperature and other parameters are controlled, so that the welding place can be cooled rapidly, and the welding place will not be affected by the rapid cooling, so as to ensure the quality of welding.

A design method for solving the production deviation of QFN packaged parts, which relates to the server field, the steps are as follows: the pins on the bottom surface of the packaged parts are extended to both sides to form an extended horizontal pin and a vertical pin is provided in the vertical direction; The inside of the extension horizontal pin is provided with a large-area hollow. A gap is provided in the middle of the vertical pin. There are multiple horizontal notches extending left and right on both sides of the gap. The invention can solve the problem of production deviation of QFN-type packaged parts: for example, the center of gravity is easily unstable. After the welding is completed, the problem of deviation occurs, resulting in the parts not being in good contact with the PCB. After improvement, this Such parts will not be misaligned during production, and at the same time, the welding area can be increased, the welding quality can be improved, and the welding reliability can be ensured, thus ensuring the stability and safety of the product.