5results about How to "Meet technical requirements" patented technology

The application relates to the technical field of nuclear fuel assembly manufacturing, and particularly discloses a nuclear fuel assembly casting type upper tube seat machining clamp and a machining method, wherein the tube seat blank is placed on a bottom plate, a positioning top block is pushed, four positioning pins below a positioning push rod are centered with positioning holes of the tube seat blank; then a positioning rod B is screwed to shorten the distance with a positioning rod A; then locking screws and fastening bolts on the edge frame of a positioning frame plate are locked to fix the tube seat blank on the bottom plate, positioning is realized; finally, the positioning rod B is completely screwed out of the positioning rod A, the bottom plate, the positioning frame plate and the tube seat blank are integrally taken out and fixed on a machining equipment. The machining clamp and the machining method satisfy the positioning clamping and machining requirements of the casting type upper tube seat, the upper tube seat after machining completely satisfies the drawing and technical condition requirements, and the machining scheme satisfies the engineering production.

The invention provides an on-chip variable resistance device structure and electronic equipment. The on-chip variable resistance device structure comprises a substrate, a nitride epitaxial layer, an electrode structure layer and a gate structure layer, wherein the nitride epitaxial layer is formed on the substrate; the electrode structure layer and the gate structure layer are formed on the nitride epitaxial layer; the electrode structure layer comprises a first electrode and a second electrode, the nitride epitaxial layer comprises a channel layer and a barrier layer which are used for forming a heterojunction interface, and the gate structure layer comprises a first semiconductor layer and a third electrode which are stacked and formed on the barrier layer, and a separation groove formed in the first semiconductor layer. By regulating and controlling the extension path and the structure parameter of the separation groove on the barrier layer and combining the applied voltage of the third electrode, the concentration and the distribution of two-dimensional electron gas at the heterojunction interface and the dynamic control of a conductive channel can be realized, so that the wide-range and high-precision dynamic adjustment of the on-chip resistance device structure on-resistance is realized, and the on-chip resistance device is suitable for large-scale production. The technical requirements of a high-performance integrated system on the on-chip variable resistor are met, and the on-chip variable resistor has important application value.

This utility model discloses a fixture for a front-end decorative strip module of an automobile fender, including a fixture body and a positioning component disposed on the fixture body. The fixture body includes a first inspection area, a second inspection area, and a third inspection area for inspecting three main parts of the front end of the fender: the top, the middle, and the bottom. The first and third inspection areas are respectively located at both ends of the second inspection area. The positioning component includes multiple positioning blocks and magnetic blocks disposed on the fixture body, and also includes a positioning pin disposed in the first inspection area. The fixture body is positioned at the front end of the fender by the positioning component, and the gap between the fixture body and the front end of the fender after positioning is used to measure the surface height difference and contour gap value of the front end of the fender. This simulates the fit between the contact parts of the subsequent assembled parts, identifies possible gap surface difference fit problems in advance, and determines whether the dimensions of the front end of the fender meet the design requirements at the body-in-white stage.

The application provides an ultrathin ultrawide low-temperature steel plate and a production method thereof. The chemical composition of the steel plate comprises, in percentage by mass, C: 0.06%-0.09%, Si: 0.15%-0.25%, Mn: 1.10%-1.20%, P≤0.012%, S≤0.003%, Cr: 0.10%-0.20%, Ni: 0.20%-0.35%, Nb: 0.015%-0.025%, Ti: 0.005%-0.015%, Alt: 0.02%-0.05%, T.O≤0.002%, N≤0.005%, H≤0.00015%, and the balance is iron and inevitable impurities. The continuous casting billet with the aforementioned chemical composition of the steel plate is subjected to the processes of heating, descaling, rolling, cooling and straightening to obtain the ultrathin ultrawide low-temperature steel plate. The inclusion size of the continuous casting billet is less than or equal to 35 microns, and the center segregation grade is better than the B class 1.0 grade.

This invention relates to the field of bamboo powder and polymer composite materials, specifically to a biodegradable film and bag modified bamboo powder / PBAT composite material and its preparation method. The composite material comprises the following raw materials in parts by weight: 5-20 parts modified bamboo powder, 0-6 parts polylactic acid resin, 65-85 parts PBAT polyester resin, 5-15 parts inorganic filler, and 0.5-2 parts lubricating dispersant. The modified bamboo powder is obtained by grinding bamboo powder in a disc mill, simultaneously adding a liquid ester coupling agent via spray, and then modifying it with ultraviolet irradiation. In this invention, during the ultrafine grinding of bamboo, an ester coupling agent is introduced via atomization, followed by ultraviolet irradiation to induce a free radical reaction, enhancing the hydrophobic modification effect of the ultrafine bamboo powder. This achieves efficient dispersion of the bamboo powder in the PBAT resin carrier, solving the problem of easy agglomeration, while ensuring excellent and stable blown film processing performance. The composite material can be applied to film and bag products such as mulch films, shopping bags, garbage bags, pet bags, and express delivery bags.