3results about How to "Reduce stress concentration points" patented technology

This invention discloses a semiconductor quartz component polishing device, relating to the field of quartz component polishing technology. The device includes a main body, inside which a polishing assembly and a rotating assembly coaxially arranged with the polishing assembly are installed. A mounting arm is mounted on the rotating end of the rotating assembly, and a ball head seat is mounted at the bottom of the mounting arm. A positioning assembly capable of vertical rotation is installed inside the ball head seat. Through the arrangement of the polishing assembly and the positioning assembly, the quartz rod is positioned, allowing the polishing assembly to first polish the end of the quartz rod. Then, combined with the cooperation of the rotating assembly and the electric push rod, the entire circumference of the quartz rod's end face can be uniformly and continuously contacted with the polishing assembly. This eliminates the need for manual polishing of the quartz rod by hand, efficiently chamfering the end of the quartz rod, eliminating quality fluctuations caused by inconsistent polishing force and path during manual polishing, effectively removing micro-cracks, scratches, and unevenness left from cutting, and reducing potential stress concentration points.

This invention relates to the field of green special refractory ceramics technology, and particularly to a green refractory thermal shock resistant converter slag-blocking sliding plate and its preparation method. The raw materials for the aforementioned green refractory thermal shock resistant converter slag-blocking sliding plate, by weight, include: 50-80 parts of tabular corundum particles, 10-20 parts of fine tabular corundum powder, 1-3 parts of α-alumina micro powder, 5-10 parts of zirconium mullite, 5-10 parts of dispersed graphite, 1-2 parts of carbon fiber, 1-2 parts of silica micro powder, 1-2 parts of titanium powder, 1-5 parts of boron nitride, 1-5 parts of boron carbide, and 1-3 parts of phenolic resin; the raw materials for the dispersed graphite include: flake graphite powder, ferric nitrate, urea, potassium nitrate, and surfactant; the mass ratio of flake graphite powder, ferric nitrate, urea, potassium nitrate, and surfactant is 5-10:1-3:1-3:1-2:1-2. The thermal shock resistance, compressive strength, and high-temperature flexural strength of the converter slag-blocking sliding plate obtained by this invention are simultaneously improved.

This invention relates to the field of cable technology and proposes a water-blocking cable and its preparation method. A water-blocking cable comprises, from the inside out, a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer, a metal shielding layer, a water-blocking layer, and an outer sheath layer. The outer sheath layer comprises the following components by weight: 15-20 parts of tetrafluoroethylene rubber, 40-50 parts of chlorosulfonated polyethylene, 20-30 parts of ethylene-butyl acrylate copolymer, 20-30 parts of filler, 1-3 parts of vulcanizing agent, 0.5-1.5 parts of co-vulcanizing agent, and 4-6 parts of stabilizer; the chlorine content in the chlorosulfonated polyethylene is 26wt%-35wt%; and the butyl acrylate content in the ethylene-butyl acrylate copolymer is 27wt%-35wt%. This technical solution solves the problem of poor impact resistance of the outer sheath layer in existing water-blocking cables.