76results about How to "Uniform internal stress" patented technology

The invention discloses an environmental friendly, wear resistant and sound-absorbing double-layer-structure waterproof wood-plastic floor, and relates to the technical field of wood-plastic floor production. The environmental friendly, wear resistant and sound-absorbing double-layer-structure waterproof wood-plastic floor comprises a base material layer and a decorative layer. The base material layer is made from the following raw materials, by mass, 50 to 55 parts of straw powder, 35 to 40 parts of hard resin, 12 to 15 parts of amino resin, 10 to 13 parts of modified bamboo powder, 5 to 8 parts of calcium carbonate, 4 to 6 parts of chlorinated paraffin, 3 to 5 parts of polyvinyl alcohol, 3 to 4 parts of polyester fiber, 2 to 4 parts of magnesium hydroxide, 2 to 3 parts of nanometer sponge, 1 to 2 parts of triethanolamine, 8 to 11 parts of glycerol and 10 to 13 parts of ethanol. The decorative layer is made through steps of immersing color or texture decorative paper in an adhesive, and paving the dried and solidified decorative paper on the base material layer, wherein the adhesive is made from the following raw material by mass. The environmental friendly, wear resistant and sound-absorbing double-layer-structure waterproof wood-plastic floor has a double-layer structure which is a structure of a novel wood-plastic floor, the surface of the decorative layer is flat and smooth, so the wood-plastic floor is easy to maintain and clean, good in wear resistance and corrosion resistance. The base material layer can stop moisture, so defects that a present floor easily bents, deforms, shrinks in dry conditions and expands in wet conditions.

The present invention belongs to the field of cutting tool, and relates to cutting tool for stone material, cement, glass and ceramic product. The production process of composite diamond saw blade substrate includes the technological steps of: preparing two single saw blade substrates, combined dot welding, quenching and tempering, finish machining, secondary tempering and finishing grinding to form the composite diamond saw blade substrate product. The present invention has the advantages of homogeneous hardness, high production efficiency and less crack forming possibility of the composite substrate.

The invention discloses a method for producing wood composite floor which includes the following steps: prepressing the base material for not less than 20 seconds at pressure above 8MPa and temperature above 100 degree Centigrade; cooling the base material, sanding the base material according to the required thickness with grinding belt whose mesh is above 100m, then choosing one side of the base material as decorative surface, and sanding the decorative surface with grinding belt whose mesh is above 200m to obtain a base material with a thickness tolerance of +/-0.3mm and an angularity of less than 2%; combining the base material, the faced layer, the balance layer into a blank, heat pressing for not less than 20 seconds at the temperature above 150 degree Centigrade and pressure above 5Mpa; then cooling the treated base material for 8 hours or longer, cutting and machining into the finished product in the mortising machine.

The invention discloses a solid wood. The figure of flat plane direction of splicing plate (2) is trapezoid. The height direction of said trapezoid is the longitudinal direction of wood fiber. Two ends of splicing plate (2) are the big end (3) and the small end (4) of splicing plate respectively according to the long bottom margin and the short bottom margin of trapezoid. Big ends (3) and small ends (4) of adjacent splicing plates (2) are arranged in cross with each other. The invention makes wood with difference in different position be distributed reasonably so as to make inner stress and deformation of product uniform. The invention makes full use of the natural figure of original material produce product so as to improve the using rate of wood. It makes full use of the natural figure of original material splice product to decrease the processing volume and improve the producing efficiency.

The invention discloses toughened ceramic for an insulator and a preparation method of the toughened ceramic. The toughened ceramic is prepared from, by weight, 2-3 parts of aluminum borate whiskers, 70-80 parts of silicon carbide micro powder with the proper size, 20-30 parts of aluminum nitride micro powder with the proper size, 1-1.5 parts of calcium fluoride powder, 10-15 parts of carbon powder, 10-15 parts of molybdenum silicide, 6-8 parts of ethyl orthosilicate, 3-5 parts of absolute ethyl alcohol, 3-5 parts of purified water and 1.5-2.5 parts of thermoplastic phenolic resin. By means of the steps of raw material preparation, insulator pre-preparation, insulator sintering and completing, the high-tenacity insulation ceramic with the volume resistivity larger than or equal to 2*1,013 omega-cm, the dielectric strength larger than or equal to 750 kV/cm, the thermal conductivity larger than or equal to 25 W/m.K, the bending strength larger than or equal to 400 Mpa, the Young modulus larger than or equal to 320 Gpa and the breaking tenacity larger than or equal to 25 Mpa is formed. The toughened ceramic is good in economical efficiency, resistant to high temperature oxidation and high in breaking tenacity, and the functions of main materials complement one another.

The invention discloses a preparation method of quartz glass. The method comprises the steps of: (a) heating quartz particles to partial melting to form a porous quartz body; (b) subjecting the porous quartz body obtained in step (a) to dehydration treatment so as to obtain a dehydrated porous quartz body; and (c) heating and sintering the porous quartz body obtained in step (b) to form the quartz glass. The invention relates to the technical field of preparation of a quartz glass material from quartz sand or quartz powder through oxyhydrogen flame, as a breakthrough, quartz sand at a semi-molten state is sprayed to the porous quartz body, and the porous quartz body is dehydrated, the hydroxy content is greatly reduced to less than 15ppm, or even below 5ppm, thus improving the purity of the prepared quartz glass material without significant increase of the preparation cost by a simple preparation process and preparing the high purity quartz glass.

The invention provides a plate material, a solid wood composite floor base material and a column material made from branch materials and round rod materials, and a manufacturing method. A core material is formed by splicing half-square round battens; each half-square round batten is a square round batten material obtained by cutting the front, back, left and right surfaces of the a round bar material into bastard faces and forming a circular arc between the two adjacent bastard faces; the square round batten material is sawed into two symmetrical halves by through a center axial line and a bastard face center line to become two half-square round battens with the same cross sections; a part of a plurality of square round batten materials and/or half-square round battens and/or half-square round battens is combined according to requirements; the adjacent bastard faces are bonded to form the required column material, plate material or solid wood composite floor base material. Through the ingenious design and the simple process, the branch materials and the rod materials are made into various materials, so that the wood utilization rate is greatly improved; the precious wood resources are saved; the importing rare hardwood is reduced; the plate material cost is reduced. The purpose is wide; the solid-wood composite floor base material and various plate materials can be manufactured; partition walls, furniture, floor slabs, upright posts and cross beams can be made.

The invention discloses a toughened glass insulator and a fabrication method thereof. The insulator at least can resist lightning steep slope peak 6,000kV/s and can stand repeated circulation impact of -50 to 50 DEG C in a standard load condition, a standard load can be still supported after self explosion at 0 DEG C, the surface pressure stress is not lower than 150Mpa, the impact strength of an U-shaped gap is not lower than 20J/cm<2>, and the light transmittance is not lower than 98%. On the basis that lead glass belonging to toughened glass, lanthanum oxide and bismuth oxide which are used for improving chemical stability and light transmittance of glass are added, zirconium oxide and titanium oxide which are used for improving acid and alkali resistance, light transmittance and radiation protection capability of the glass are also added, and the toughened glass insulator is finally fabricated through tempering under the protection of nitrogen. The toughened glass insulator has the advantages of good electrical property, high automatic fracture toughness, high light transmittance, good integrated mechanical property, long service lifetime and good economy.

The invention relates to thin size high-strength steel for engineering machinery. The steel is prepared from the following components in percentage by mass: 0.07%-0.10% of C, 0.15%-0.30% of Si, 1.2%-1.6% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0%-0.08% of Nb, 0%-0.07% of V, 0.06%-0.13% of Ti, 0.1%-0.2% of Cr, 0.1%-0.2% of Mo, 0.08%-0.15% of Nb+V+Ti, 0.25%-0.35%of Mo+Cr, and the balance Fe and impurities. The the strip shape control method is characterized in comprising blast furnace molten iron, molten iron desulfurization, converter smelting, LF+RH refining, continuous casting, hot charging and hot conveying, heating, rolling, cooling, coiling, flattening, tempering heat treatment and straightening process. According to the steel, the yield strength is greater than 690 MPa, the tensile strength is greater than 785 MPa, and the impact work at minus 20 DEG C is greater than 100 J.

The invention discloses a ceramic insulator with a built-in tough frame and a manufacturing method thereof. The ceramic insulator comprises the following raw materials in parts by weight: 50-60 parts of silicon carbide powder, 10-15 parts of carbon powder, 10-15 parts of silicon dioxide, 6-8 parts of tetraethyl orthosilicate, 3-5 parts of anhydrous ethanol, 3-5 parts of pure water and 1.5-2.5 parts of thermoplastic phenolic resin. A central radial basket-shaped fiber touch frame woven from graphitized carbon fiber is implanted at the center of the ceramic insulator. The ceramic insulator disclosed by the invention has a volume resistivity of not less than 5 *10<12>.cm and a dielectric strength of not less than 650 kv/cm, a thermal conductivity of not less than 45 omega/m .K, a bending strength of not less than 550Mpa, a Young's modulus of not less than 400Gpa, and a fracture toughness of not less than 30Mpa. The ceramic insulator disclosed by the invention has the advantages of good internal thermal conductivity, good frame structure support, and good impact resistance and high temperature oxidation resistance.

The invention relates to an electro-optic compound port machine pony roll high-voltage cable, which consists of three main high-voltage wire cores, an optical cable, an earthing core, a wadding core, a saddle-shaped skeleton strip, reinforcing layers and an outer sheath. The main high-voltage wire cores, the optical cable, the earthing core and the wadding core are positioned on the saddle-shaped skeleton strip; the optical cable, the earthing core and the wadding core are respectively positioned between two adjacent main high-voltage wire cores of three main high-voltage wire cores; and the reinforcing layer are covered outside the main high-voltage wire cores, the optical cable, the earthing core and the wadding core. A liner layer is filled in the interstice in the reinforcement layer, the outer sheath is arranged outside the reinforcing layer; in addition, the invention also relates to a method for producing the cable. The cable of the invention has the characteristics of no electric induction, less space occupation and long service life.

An LED is provided, the LED comprising a lighting assembly and a light bead. The light bead encases the lighting assembly. A cross-section of an upper portion of the light bead is an asymmetric shape with respect to the projection of a normal of the lighting assembly on the cross-section of the upper portion of the light bead, while a cross-section at the lower portion of the light bead perpendicular to the axis is a symmetric shape with respect to the projection of the normal of the lighting assembly on the cross-section at the lower portion of the light bead. The lighting assembly is located at a symcenter of the lower portion of the light bead. The aforementioned LED can increase its visible range, and can ensure an even distribution of the internal stress surrounding the lighting assembly. An LED packaging method is also provided.

A seat reclining device (1) includes a spiral spring (9) made of a wire (9A) and formed in a spiral shape having a first engaged portion (91) and a second engaged portion (92), a first engaging member (7) and a second engaging member (8) characterized in that one/each of the first engaging member and the second engaging member includes an extending direction supporting member (s) supporting the first engaged portion and/or the second engaged portion, from the opposite end side of the wire in an extending direction thereof, a first supporting member (o) supporting the first engaged portion and/or the second engaged portion from outside of the wire, and a second supporting member supporting (i) the first engaged portion and/or the second engaged portion from inside of the wire in a normal direction thereof.

The invention discloses a solid wood composite floor board baseplate connected by a plurality of integrated slats, and strengthening layers are added at the upper and the lower surfaces. The solid wood composite floor board baseplate is characterized in that the integrated slats comprise two longitudinally integrated slats positioned at both ends of the integrated baseplate; a plurality of transversely integrated slats mutually connected between the two longitudinally integrated slats, wherein at least two edges connected with the transversely integrated slats are in finger joint with the integrated slates or wood laths, wherein the transversely integrated slats are in approach grafting, the two longitudinally integrated slats and the transversely integrated slats are in approach grafting or finger joint, the upper and the lower surfaces are respectively attached with a strengthening layer so that each of the integrated slats of the longitudinally integrated slats and the transversely integrated slats is fully attached up and down or left and right. The solid wood composite floor board baseplate has uniform internal stress and small deformation, can be widely applied in processing floorboard, stair board and table top, and can be widely applied to attaching solid wood coating, melamine or aluminum oxide mask.

The invention relates to a special maintenance device for realizing locomotive shunting operation at a railway locomotive maintenance field and the special maintenance device allows railway locomotives to complete parallel shunting operation. A locomotive moving platform is a large and medium device in the rail transit industry and has a large size. According to a traditional manufacturing method,parts can only be produced in factories and transported to the field to be assembled and welded for forming, so the mutual parallelism and perpendicularity of wheelsets of a walking part of the locomotive moving platform can not be ensured resulting in rail gnawing, deviation and other situations during the operation process of the locomotive moving platform and an influence on the safe and reliable operation of the locomotive moving platform. An integral locomotive moving platform of the invention adopts the integral manufacturing in a manufacturing plant to ensure the parallelism, perpendicularity and stable operation of the wheelsets during the operation process of the integral locomotive moving platform assembled on site and the avoidance of hunting, rail gnawing and other situations,and can achieve the reliable bidirectional connection of rails of the integral locomotive moving platform. By virtue of the integral manufacturing, disassembled transportation, fixing pins for fixingpositions, bolts for jointing and assembling and welding for forming, the integral locomotive moving platform reduce the on-site workload, shorten the assembling time and improve the installation efficiency. The integral locomotive moving platform has a neat and delight exterior, and the wiring is safe and reliable.

The invention relates to a production method of a novel environment-friendly wood-plastic floor. The production method includes the steps of firstly, adding amino resin, polyvinyl alcohol, ethanol and a thermal stabilizer into a high-speed mixing machine, performing thermal-insulation mixing for a certain period of time, naturally cooling, adding a lubricating agent, adding the materials into a ball milling machine, and performing ball milling to obtain coating liquid; secondly, premixing a PVC plastic raw material, plasticizer, an acrylate impact modifier and straw powder to obtain a first mixture; thirdly, mixing the first mixture with modified bamboo powder, calcium carbonate, a titanate coupling agent and an anti-aging agent to obtain a second mixture; fourthly, using a double-screw extruder and a molding die to perform high-temperature extrusion molding on the second mixture, using the molding die for molding, and performing water cooling, traction and cutting to obtain a base plate; fifthly, coating the surface of the base plate with the coating liquid obtained in the first step to obtain the novel environment-friendly wood-plastic floor. The novel environment-friendly wood-plastic floor is high in wear resistance and corrosion resistance.

The invention belongs to the technical field of environmental vibration and noise control, and discloses a preparation method of a semi-ellipsoidal pot box vibration absorber filled with iron tailingsand and ceramsite mixed particles. The vibration absorber is a pot box with an inner cavity with a box cover in a semi-ellipsoid shape, the semi-ellipsoidal pot box is loosely filled with mixed particles with the volume ratio of 70%, and the mixed particles are composed of the following components of, 60% of original tailing sand particles, 30% of ceramsite and 10% of nano iron tailing sand. According to the method, the semi-ellipsoidal pot box structure capable of effectively dissipating external vibration energy during horizontal vibrating in each direction and the particle proportion in the pot box can be obtained; the novel concept that the waste iron tailing sand is used as the main energy consumption particles of the vibration absorber is achieved; and a new recycling way of the waste iron tailing sand is obtained, the pollution of the iron tailing sand to the environment can be reduced, and the damage of the vibration and the noise to the environment can be reduced. In conclusion, the comprehensive performance of all aspects of the semi-ellipsoidal pot box vibration absorber filled with the iron tailing sand and the ceramsite mixed particles is excellent, and the absorber has a good application prospect.

The present invention relates to hard alloy brazing plate and bore bit. The brazing plate has a brazing plate body and locating fins in the same height on two sides of the body to ensure the brazing plate body fixed in the center of the slot for homogeneous brazing seam, high brazing seam strength, the homogeneous elimination of the high temperature stress of the hard alloy brazing plate during the brazing, stable performance, homogeneous strength and no cracking. Or, the brazing plate has symmetrical inward notches on two sides to raise the raise the radial shock resistance and wear resistance of the brazing plate and ensure the homogeneous radial wear. The bore bit with the hard alloy brazing plate embedded in the fixing slot has high product quality, and long service life of driving length up to 800-900.