4results about How to "Smooth welding surface" patented technology

The invention discloses an induction heating brazing machine which comprises a power supply cabinet, a hose and a brazing machine, an induction heating circuit is arranged in the power supply cabinet, a water pump and a circulating cooling water tank are arranged in the power supply cabinet, one end of the hose is connected with the power supply cabinet, the other end of the hose is connected with the brazing machine, and a water inlet pipe, a water return pipe, an anode cable and a cathode cable are arranged in the hose. The brazing machine comprises a shell and an induction coil, one end of the shell is provided with an end plate, the end plate is provided with an anode copper sleeve and a cathode copper sleeve, the induction coil is made of a copper pipe, and one end of the induction coil made of the copper pipe is connected with the anode copper sleeve. The invention has the following technical effects: 1, flammable and explosive gas is not needed, and no safety risk is caused to human body and property; harmful gases such as carbon monoxide and carbon dioxide are not generated, and the method is environment-friendly; thirdly, the welding surface is flat, and the welding quality is high; the coil is cooled in a water passing mode, and the coil is prevented from being burnt out in the heating process.

This invention discloses an internally threaded steel pipe, its processing technology, and processing device. The internally threaded steel pipe includes a stainless steel inner tube (1), which is formed by rolling stainless steel strip. The inner wall of the stainless steel inner tube (1) is provided with thread teeth (2). The number of thread teeth (2) is multiple and they are distributed in a ring along the inner wall of the stainless steel inner tube (1). A thread groove is formed between adjacent thread teeth (2). This invention can reduce the production cost of internally threaded pipes for air conditioners and improve their service life.

The invention discloses a duplex stainless steel metal type flux-cored wire for a 3D printing flange structural part and a method. Flux core alloy components in the metal type flux-cored wire comprise, by mass, 22%-28% of chromium powder, 1%-2% of titanium powder, 2%-4% of aluminum powder, 6%-8% of molybdenum powder, 2%-3% of copper powder, 5%-7% of niobium powder, 0.03% of carbon powder, 1%-2% of manganese powder, 0.3%-0.6% of silicon powder, 0.1%-0.2% of chromium nitride and the balance iron powder, and the sum of the mass percentages of the components is 100%. The duplex stainless steel structural part obtained through 3D printing is attractive in shape, excellent in mechanical property and good in corrosion resistance, and the use requirements of flange structural parts are completely met.

The utility model discloses a wear-resistant ceramic welding backing, which relates to the technical field of welding and comprises a ceramic backing body, the ceramic backing body comprises a backing main body, a welding groove is formed at the top end of the backing main body, and tin foil paper and adhesive paper are arranged at the bottom end of the backing main body. The outer wall of the gasket body is sequentially covered with a metal reinforcing layer and a whisker wear-resisting layer, and a rib wire assembly is laid in the gasket body. According to the wear-resistant ceramic welding backing ceramic, the outer wall of the backing body is sequentially covered with the metal reinforcing layer and the whisker wear-resistant layer, the metal reinforcing layer optimizes and improves the mixing proportion of silicon carbide and graphite, the hardness and the wear resistance of the ceramic are correspondingly improved, the whisker wear-resistant layer is made of calcium carbide whiskers, and the material is high in friction coefficient and good in wear resistance. The wear resistance and the heat resistance are high, and the wear resistance of the ceramic liner body is further improved; and by arranging the rib wire assembly, the whole ceramic gasket body can be completely taken down so as to be convenient to use.