976results about How to "Reduce extrusion pressure" patented technology

The invention relates to a continuous extrusion machining device used for a magnesium alloy sheet strip with a weak basal texture and an extrusion machining method. The device comprises an extrusion system mainly composed of a pressure motor, an extrusion telescopic head, a male die and a female die, and multiple inclined steps gradually getting close to the axis of a die cavity are arranged at the two sides below the upper middle portion in the die cavity of the female die and are distributed asymmetrically. In the extrusion machining process, a magnesium alloy blank is placed in the die cavity of the female die and extruded by the descending male die, and as the male die descends continuously, the magnesium alloy blank is gradually thinned to form a magnesium alloy sheet with the weak basal texture. Due to step-by-step grain refinement and basal texture weakening, extrusion force in the extrusion process is greatly reduced, the average grain size of the magnesium alloy is greatly reduced compared with that of a magnesium alloy extruded normally, and the (0002) basal texture is reduced to 8.2 from 27.6 compared with that of a sheet obtained through normal extrusion.

The invention provides an image sensing chip packaging structure. The packaging structure comprises an image sensing chip which has a first surface and a second surface, which are opposite, wherein the first surface is provided with an image sensing area and a welding pad arranged around the image sensing area; a through hole running from the second surface to the welding pad; an electrical wiring layer arranged along the inner wall of the through hole and extending to the second surface, wherein the electrical wiring layer is electrically connected with the welding pad; a solder resist layer filling the through hole and covering the electrical wiring layer, wherein an opening is formed in the solder resist layer, and the bottom portion of the opening exposing the electrical wiring layer; a guide welding pad covering the inner wall of the opening and the bottom portion of the opening and extending to the solder resist layer, wherein the guide welding pad is electrically connected with the electrical wiring layer; and welding bumps arranged on the guide welding pad, wherein the welding bumps are electrically connected with the guide welding pad. The structure reduces the defects of the image sensing chip electrical wiring layer.

The invention discloses high-plasticity two-phase yttrium-containing magnesium-lithium-aluminum alloy and a preparation method thereof. The alloy comprises the following specific components in percentage by weight: 9.50-10.80% of Li, 3.00-5.00% of Al, 0.50-0.70% of Y, 0.10-0.30% of Zr and the balance of Mg; the alloy has the structural characteristics that an alpha phase, a beta phase and a precipitated phase exist at the same time, wherein the alpha phase is a Mg-based solid solution and is in a close-packed hexagonal structure, the beta phase is a Li-based solid solution and is in a body-centered cubic structure, and the precipitated phase is a rare earth compound Al2Y; and the alloy has the characteristics of low density, high plasticity and higher strength. The preparation method disclosed by the invention is a normal-temperature plastic deformation method which combines casting with equal channel angular extrusion or traditional extrusion deformation process; and compared with the traditional high-temperature deformation process, the preparation method has good practicality and is simpler and more convenient to operate, and can be used for effectively lowering the production cost, thus the preparation method has good industrial production prospects.

A method for preparing the germinated embryo rice from non-glutinous rice includes such steps as spreading said rice to become thin layer, immersing in water, germinating, passivating in the water at 70-100 deg.C, washing, and antistaling packing or drying including hot air baking and microwave drying. Its apparatus is composed of container with openable cover or door, and rice spreading unit.

The invention belongs to an extrusion forming technique of non-ferrous materials. The precise extrusion forming technique of a thin-wall long-tube part blank comprises two procedures, namely, a primary reverse extrusion and a secondary reverse extrusion; the primary reverse extrusion obtains a primarily extruded tube blank (18) by adopting a primary male die (7) and a primary concave die (8) by virtue of a primary backing-out punch (4), the secondary reverse extrusion is carried out by adopting a secondary fixed male die (16), a secondary movable male die (12), a secondary concave die (6) by virtue of a secondary backing-out punch (14); the secondary movable male die (12) is placed into the primarily extruded tube blank (18), the secondary fixed male die (16) moves downward along the secondary movable male die (12) to extrude the primarily extruded tube blank (18), therefore, the secondary reverse extrusion is completed. The thin-wall long-tube part blank produced by adopting the technique of the invention has the advantages that the internal quality, dimensional accuracy and the utilization ratio of materials are greatly improved, and the production efficiency is improved and the production cost is lowered.

The invention provides a disposable wearing article having a structure capable of reducing the coating amount (amount of use) of an adhesive and suppressing occurrence of defective products. In addition, the invention provides a manufacturing apparatus and a manufacturing method for easily and inexpensively producing such a disposable wearing article. In the case of a waist gather rubber (30), the adhesive is applied to the outer back sheet and the inner back sheet (1, 2) only in tension areas (TA1, TA2), and a free area (FA) in a relaxed state is formed in a non-adhered state with the back sheet (1, 2). When the wearing article is worn, wrinkles are formed substantially only by the contraction of the tension areas (TA1, TA2) of the wrinkles (30). The free area (FA) in the slack state and the non-adhered state is cut in two at the intermediate position. Each of the cut pieces (301, 301) is integrally connected to an adjoining tension area (TA1, TA2) in a tensioned state and in an adhered state.

A cold precision forging process for a bevel gear is disclosed, and comprises the steps of: cutting the blanking by cylindrical bars; cutting a conical degree on a segmental length of the blank as segmental pre-form for positioning the blank in a die; performing spheroidization for the machined blank to reduce the hardness, then scouring and descaling, phosphorizing, saponifying and lubricating; the first cold precision forging step comprises: upsetting-extruding segmental tooth form in an extrusion mould to obtain a first extrusion which is used as the blank of the second first cold precision forging step; performing spheroidization again for the first extrusion, then scouring and descaling, phosphorizing, saponifying and lubricating; the second cold precision forging step comprises: upsetting-extruding all tooth forms in the extrusion mould to obtain the coarse material of the bevel gear; machining and shaping the coarse material of the bevel gear and cutting unnecessary materials on the end surface to obtain finished products of the bevel gear. The invention further provides an extrusion mould. The invention has higher production efficiency, reduces the material waste, lowers the cost and improves the mechanical property.

The invention discloses a brazing flux-containing aluminum alloy soldering wire and a preparation method thereof, which belong to the technical field of brazing materials. The soldering wire consists of uniformly mixed aluminum silicon brazing material powder and fluoride brazing flux powder, wherein the content of the aluminum silicon brazing material powder is 93 to 85 percent; the content of fluoride brazing flux powder is 7 to 15 percent; the aluminum accounts for 88 percent and the silicon accounts for 12 percent of the aluminum silicon brazing material powder; the fluoride brazing flux powder is potassium aluminum fluoride mixed salt consisting of KF-AlF3 series; and the molar ratio of AlF3 to KF is 44.5 to 55.5. The preparation process comprises the following steps of: preparing the aluminum silicon brazing material powder and the fluoride brazing flux powder; uniformly mixing the two kinds of powder, and performing cold isostatic pressing and vacuum sintering to prepare a blank; and extruding and drawing the blank on a thermal extruder to obtain a product. The soldering wire and the method have the advantages of shortening processing time and reducing waste treatment, along with high surface accuracy, no need of head rolling machine between passes, high material utilization ratio and high performance of soldering process.

The present invention provides an extrudable reinforced resin-containing composition comprising resin capable of plastic flow, reinforcing material, and a lubricant composition comprising oxidized polyethylene wax, ester wax, and amide wax. Also provided are the lubricant composition, and extrusion methods and extruded products based on the present compositions.

The invention discloses an extrusion forming mould for annular ribs of magnesium alloy shell parts. The extrusion forming mould mainly comprises an upper mould plate, a mandrel, a split male mould pull rod, split male moulds, tension springs, a male mould sliding guide rail, a split male mould sliding bottom plate, a supporting plate and a cylindrical female mould, wherein the head part of the mandrel is conical, a center hole is formed in the axial direction of the mandrel, one end of the split male mould pull rod is inserted in the center hole, the other end of the split male mould pull rod is fixed on the split male mould sliding bottom plate, the at least two split male moulds are symmetrically arranged around the split male mould pull rod, are fixedly connected with the split male mould pull rod through the tension springs and are arranged in a radial sliding groove of the split male mould sliding bottom plate through the male mould sliding guide rail, a wedge-shaped inclined plane adapting to the conical head part of the mandrel is arranged at the inner side of each split male mould, an arc-shaped extruding bulge is arranged at the arc-shaped wall surface of the outer side of each split male mould, and the arc length of each extruding bulge is more than the distance between each two adjacent extruding bulges. According to the extrusion forming mould, all the split male moulds do radial movement by virtue of the axial movement of the mandrel, metal flows in the radial direction, and thus the annular ribs are generated.

The invention provides a turning method. The method comprises the following step: turning the outer surface of a niobium alloy target material or a niobium alloy target material by adopting a turning tool, wherein the front angle of the turning tool is 20-40 degrees, the rear angle is 4-15 degrees, the main deflection angle is 45-60 degrees, the auxiliary deflection angle is 45-90 degrees, and the blade inclination angle is 10-25 degrees. By selecting the front angle, rear angle, main deflection angle, auxiliary deflection angle and blade inclination angle of the turning tool, cuttings can be discharged from processed surfaces, so that the cuttings are prevented from sticking to the tool, and the cutting difficulty is lowered. The invention further provides a turning tool. The front angle of the turning tool is 20-40 degrees, the rear angle is 4-15 degrees, the main deflection angle is 45-60 degrees, the auxiliary deflection angle is 45-90 degrees, and the blade inclination angle is 10-25 degrees.

The invention discloses a mould for extruding aluminum alloy. The mould comprises a flow guide mould and a section mould, which are arranged at the front and the back along a fluid direction, wherein the corresponding cavity sizes of the flow guide mould and the section mould are designed according to parts, the flow guide mould consists of a sinking table and a transition cavity, the sinking table is in an inner cone structure, the front end of the transition cavity is in a counter bore structure, the diameter size of the counter bore structure is less than the diameter of an external circle, the rear end of the counter bore structure further adopts a broadsiding structure, and a connection place between the cavity and the flow guide mould is in an inverted cone structure. The mould disclosed by the invention has the beneficial effects that the flow guide mould of the side broadsiding of the first counter bore is designed, an ingot is peeled by the side broadsiding of the first counter bore, the extrusion force and broadsiding pre-deformation can be reduced, the high-precision forming can be carried out by the inverted cone section mould, and the extrusion force can be further reduced as well as the tissue can be further improved.

The invention provides a preparation method for ultra-fine grain pure titanium through equal channel angular pressing. According to the invention, test conditions are improved on the basis of the prior art, a to-be-extruded sample is designed to be a copper-wrapped titanium rod, so frictional force generated during contact between the sample and a channel is reduced during extruding; extruding force is decreased to no more than 150 KN, so experimental operability is improved, and refining of industrial pure titanium can be finished at room temperature under small extruding force through equal channel angular pressing. At room temperature, the phenomena of restoring and recrystallization softening of crystal grains during refining hardly occur, so a substantial crystal grain refining effect is obtained and a high-strength industrial pure titanium block can be obtained through few times of extruding. According to results of testing of mechanical properties of the prepared ultra-fine grain pure titanium, the ultra-fine grain pure titanium has substantially improved comprehensive mechanical properties, block ultra-fine grain pure titanium can be used in practice, and the application scope of the ultra-fine grain pure titanium is broadened.

The invention discloses a manufacturing technology of automobile asymmetrical universal joint fork based on cold extruding technology, comprising the following steps: (1) a cylindrical bar stock is adopted for shearing and blanking; (2) spheroidizing annealing is carried out on a blank so as to reduce blank rigidity, then oxide scale is removed by acid washing, and phosphating, saponification and lubrication treatment is carried out to obtain cylindrical blank; (3) direct-extrusion sealing shaping calibration is carried out to extrude and shape the cylindrical blank so as to obtain the needed asymmetrical shape of the bottom half of the universal joint fork; (4) extruded pieces obtained after direction extrusion are performed with spheroidizing annealing, then oxide scale is removed by acid washing and phosphating, saponification and lubrication treatment is carried out; and (5) backward-extrusion shaping is carried out: furcation is formed by backward extrusion, and the furcation of the universal joint fork freely extends upwards; the redundant parts of the furcation end surface are processed and cut off by a successor. The invention also provides a special mould for realizing the manufacturing technology. The invention improves material utilization factor, has high production efficiency, improves production environment, and has high precision of workpiece size and favourable surface quality.

A seven-level adjustable reciprocating type electrorheological fluid damper mainly comprises a positive-pole conducting wire, a negative-pole conducting wire, a positive-pole piston cylinder cover, a negative-pole piston cylinder cover, positive-pole conducting rubber, negative-pole conducting rubber, a piston rod, an insulating piston cylinder, a positive pole, a negative pole, a backflow control path, a small piston, a middle piston, a large piston and electrorheological fluid. The positive-pole conducting rubber and the negative-pole conducting rubber replace sealing materials and play a role in sealing and conducting. Installation forms of the small piston, the middle piston and the large piston are determined by borne damping force, wherein when the damping force is large, stress is not clear, and movement speed is high, the dual-piston or three-piston form is adopted; when the damping force is small, the single-piston form is adopted. The backflow control path replaces a throttling control valve, no external electric field exists, the electrorheological fluid bears the force and flows between the positive pole and the negative pole through the backflow control path, and the seven-level adjustable reciprocating type electrorheological fluid damper is a hydraulic damper; when an external electric field is applied and shearing efficiency is high, apparent viscosity of the electrorheological fluid of the backflow control path changes, the section area of the backflow control path becomes smaller, the backflow control path is even blocked completely, and the electrorheological fluid effectively controls an engineering system by proving shearing force and extruding force.

The invention discloses a multi-purpose double-roller continuous rheological forming device for liquid metal, which is mainly used for double-roller continuous rheological forming of plates, strips, pipes, profiles, wires, composite materials and wrapping materials. The device consists of a motor, a half coupling, a decelerator, a gear box, a main machine, a cooling water tank and a coiling machine, wherein the main machine consists of a stander, an upper working roller, a lower working roller, a feeding shoe, an extrusion shoe, a die in a cavity of the extrusion shoe, and rotating speed sensors at shaft heads of the upper working roller and the lower working roller of the main machine. An annular groove of the upper working roller is mutually matched with an annular lug boss of the lower working roller. The feeding shoe is arranged at the feeding end of the main machine, and the feeding shoe and the annular groove of the upper working roller form a feeding cavity. A metal material enters into a roller gap between the two working rollers through the feeding cavity. When producing pipes, profiles, wires and wrapping materials, the extrusion shoe is arranged at the discharging end of the main machine, and an extrusion forming die can be arranged in the cavity of the extrusion shoe. The device can realize quick continuous rheological forming of the liquid metal, and can also be used for direct forming of a semi-solid metal material.

The invention relates to a manufacturing method of a hot forming rim. The manufacturing method comprises following manufacturing steps of A1, rim round pipe forming, wherein a metal plate is used for manufacturing a closed round pipe with the closed circumferential direction; A2, rim workblank forming, wherein the closed round pipe is manufactured into a rim workblank with the diameter smaller than the rim designed diameter; A3, rim workblank pre-expanding, wherein the rim workblank is subject to pre-expanding, and the diameter of the expanded rim reaches 99.5% to 99.9% of the designed diameter; A4, rim workblank heating, wherein the rim workblank is heated to the designed temperature; A5, expansion finishing, wherein through the expansion manner, the diameter of the workblank reaches the designed size; A6, stamping and hardening, wherein the strength of the rim workblank is improved to above 1300MPa. Before heating, pre-expanding is carried out, the expansion amount during hot forming is reduced, the size precision of the rim is improved, and the expanding traces are reduced; the precision of out-of-roundness of the rim is improved; after heating, the manner of expansion finishing and stamping and hardening is adopted, and the forming precision and the forming strength are more effectively improved.

The invention discloses a foldable backboard structure and display device. The foldable backboard structure comprises a backboard, the backboard comprises a folding area and non-folding areas which are located on the two sides of the folding area, and a micro structure is arranged on the part, close to one side of a displaying layer, of the folding area; an elastic component is included, and the elastic component is arranged on the side, away from the displaying layer, of the folding area. According to the display device, by arranging the micro structure on the side, close to the displaying layer, of the backboard folding area, the squeezing force on other membrane layers by the inner surface of the backboard is reduced in the state where a screen is folded inwards, waves are reduced, theelastic component is arranged on the side, away from the displaying layer, of the folding layer, a display screen of the foldable display device can be pulled to reach a flat state by using better deformation restoring capability of the elastic component, and the folding restoring capability of the foldable display device is enhanced.

The invention discloses a mechanical pretreatment system for municipal domestic waste comprehensive treatment (marsh production). The system comprises a coarse crushing unit, a vertical shaft hammer type grinding unit and a dry-wet component extrusion and separation unit which are arranged in sequence. The units are sequentially connected through a conveying machine. The invention further discloses a mechanical pretreatment process for municipal domestic waste comprehensive treatment adopting the mechanical pretreatment system. The process comprises the process steps of coarse crushing, vertical shaft hammer type grinding and dry-wet component extrusion and separation. The technical defects that organic matter separation efficiency is low and the impurity content is high according to existing domestic waste comprehensive treatment mechanical pretreatment are overcome, the waste receiving adaptability is high, the equipment integration degree is high, continuous stable operation is achieved, various kinds of domestic waste with complex ingredients are used as raw materials, dry and wet components are produced to meet different follow-up technological requirements, coordinated treatment of various kinds of municipal domestic waste is achieved, and the system and the process are suitable for being applied and popularized.