30results about How to "Uniform distribution of internal stress" patented technology

The discrete profile mold unit for heat plate formation includes upper mold, which has several closely arranged ram heads comprising screw connected to the template and matched head capable of shifting along the screw; lower mold, which has also several closely arranged ram heads comprising screw connected to the template and matched head capable of shifting along the screw. The ram heads in the upper mold and those in the lower mold are corresponding to each other and may be in the same or different axle. The present invention has the features of simple structure, low cost, convenient operation and maintenance, and adjustable ram head height.

Discrete surface die device for sheet metal thermoforming. There are several closely arranged punches on the upper die (1). The punches are composed of a screw (4) connected to the template (3) and a head body (5) matched with the screw. The head body (5) can move along the screw ( 4) Displacement; there are several closely arranged punches on the lower mold (2), the punches are composed of a screw (7) connected to the template (6) and a head body (8) matched with the screw rod, the head body (8) It can be displaced along the screw rod (7); the punches on the upper and lower dies are corresponding, and the corresponding punches on the upper and lower dies can be on the same axis or staggered from each other. It has the characteristics of simple structure, low cost, convenient operation and maintenance, and the punches can be adjusted to meet various heights. The corresponding punches are misplaced, which can not only prevent some punches from being overstressed or dead, but also make the sheet metal The number of stress points on the projection surface is increased, which is conducive to the more uniform forming of the sheet and the uniform distribution of internal stress, reducing the amount of springback after forming.

The invention discloses an impact-resistant ceramic insulator and a manufacturing method thereof. The impact strength of the insulator is not lower than 1.5J / cm 2 , the volume resistivity is not less than 1×10 14 Ω·cm, dielectric strength not less than 750kV / cm, thermal conductivity not less than 20W / m·K, flexural strength not less than 600Mpa, Young's modulus not less than 450Gpa, fracture toughness not less than 55Mpa; The finished insulator has a multi-layer buffer and support structure through multiple sintering methods for each 4mm-5mm, which can withstand multi-angle and high-frequency impact energy, and micro-structuring on the surface of the insulator, which is convenient on the one hand. In order to be used, on the other hand, the impact resistance is also increased; the impact-resistant ceramic insulator of the present invention has good economy, impact resistance, high fracture toughness, and good comprehensive mechanical properties.

The invention discloses a method for manufacturing a titanium-forge flange tee joint. The method comprises the following steps that (1) material preparation is conducted through matching of O-grade titanium sponge and an oxygen bag; (2) firstly, the titanium sponge and the oxygen bag are subjected to piezoelectric electrode treatment, so that an electrode block is obtained, and then an electrode is formed by welding; (3) the obtained electrode is placed in a vacuum electric-arc furnace for secondary smelting treatment, so that a titanium ingot is obtained; (4) heat preservation is conducted on the titanium ingot; (5) the titanium ingot is subjected to upsetting-drawing forging through an oil press, and a titanium square block is obtained after four-time upsetting, four-time drawing are conducted and two-time repeated heating treatment ; (6) the titanium square block is ground and checked, and thus a finished square block is obtained; (7) the finished square block checked to be qualified is machined, and thus a primarily-machined titanium-forge flange tee joint is obtained; and (8) the primarily-machined titanium-forge flange tee joint is subjected to external dimension checking, the diameter of a flange and the wire interval of a hole are checked in sequence, surface polishing treatment is conducted if the primarily-machined titanium-forged flange tee joint is flawless, and thus the titanium-forge flange tee joint is obtained. According to the method for manufacturing the titanium-forge flange tee joint provided by the invention, the problem that the compressive properties of a titanium-cast tee joint and a titanium-welded tee joint are insufficient is solved.

The method includes following steps: adding certain quantity of solution of thorium nitrate into tungsten oxide so as to prepare doped powder of tungsten oxide; deoxidizing the obtained doped powder of tungsten oxide to obtain powder of thorium - tungsten; acid cleaning powder of thorium - tungsten to remove impurity, and producing sintered body of powder of thorium - tungsten; using press work toobtain thorium -tungsten filament with needed diameter, and content of thorium dioxide being 0.7-1.1 wt%, and enwinding thorium -tungsten filament by using wire coil; Finally, straightening filament.The invention raises the rate of finished products, and optimizes working performance of tungsten winding.

The invention provides a titanium connection sealing ring for deep sea oil drilling equipment, which comprises a circular ring body, the central hole of the ring body is a peripheral surface, and there are circular rings along the circumferential direction of the outer circular surface of the ring body. Shaped bosses, platforms, inclined end faces and flat end faces, the inner peripheral surface can be threaded according to user requirements to connect oil pipelines or use on other equipment. It also provides a processing method for the titanium connecting sealing ring, which mainly includes the steps of sponge titanium material preparation, vacuum melting titanium ingot, forging square, heating forging, heat treatment and machining. The measured tensile strength of the invention is 565MPa, the yield strength is 460MPa, the elongation is 25.2%, the reduction of area is 44%, and the technical performance is significantly improved. It can be used reliably in deep seas from 1000m to 3000m deep or deeper, can withstand huge deep sea pressure and oil and gas transmission pressure, can also improve the service life and production efficiency of drilling equipment, and can also avoid corrosion, damage, oil leakage Pollution of the marine environment.