36results about How to "Reduce extrusion force" patented technology

The invention relates to a machining method of a high-quality large-diameter thin-wall barrel body. The machining method comprises the following steps. Firstly, isothermy or hot die anti-extrusion technology is utilized, and anti-extrusion is performed on an alloy forging rod. Secondly, machining is performed on the inner and outer surfaces of a spinning barrel billet, and finish turning is performed on the inner surface of the barrel bottom of the barrel billet. Thirdly, multi-pass brute force thinning spinning is performed on the machined spinning barrel billet, and the spinning is hot spinning or cold spinning. Fourthly, intermediate heat treatment is performed on a spinning semi-finished product, and the intermediate heat treatment is annealing or solution treatment. Fifthly, the third step and the fourth step are performed repeatedly and alternatively so that finished product spinning is performed. Sixthly, scouring and cleaning are performed on the barrel body, and finished product heat treatment is performed. Seventhly, polishing of the inner and outer surfaces of the barrel body after heat treatment in the sixth step is performed, and a finished product barrel body is obtained. By adoption of the machining method of the high-quality large-diameter thin-wall barrel body to machine a large-diameter thin-wall metal barrel body without welding lines, organization is even and fine, comprehensive performance is high, the process is short, product additional values are high, and good application and popularizing prospects and certain economic and social benefits are achieved.

The invention discloses a drawing die coil inserting apparatus of a motor stator iron core. The drawing die coil inserting apparatus comprises a work bench arranged at a rack, a stator clamping device arranged at a rack and a drawing device can move in and out of the stator clamping device. The stator clamping device is fixed at the work bench. An inserting die includes guide bars, a kidney-shaped pedestal, a kidney-shaped cover plate, a connecting rod, and a locking device; insertion slots are formed in the peripheral surfaces of the pedestal and the cover plate at intervals; and one end of each guide bar is fixed in the insertion slot of the pedestal and the other end of each guide bar is arranged in the insertion slot of the cover plate in a clearance fit mode. A through hole passing through two axial end surfaces of the cover plate is formed in the cover plate. One end of the connecting rod is fixed at the axial end surface, opposite to the cover plate, of the pedestal; and the other end of the connecting rod passes through the through hole of the cover plate and the connecting rod and the cover plate are fastened together by the locking device. Besides, a drag hook seat connecting the drawing device is arranged at the axial end surface, away from the cover plate, of the pedestal. According to the invention, line insertion is carried out on all-phase windings by multiple times, thereby preventing the enameled wires in the windings from being damaged.

The invention provides an extrusion die and a method for extrusion molding inside and outside reduction blank by the same, which relate to a die and a method for extrusion molding blanks by the die, and are aimed to solve the problems that the adoption of the common blank extrusion molding die and method cannot mold a workpiece with an external shape of one end of a larger diameter and the other end of a smaller diameter, and the workpiece with an internal hole end of a larger diameter, a bottom part of a smaller internal diameter and a long axial length. The die is characterized in that a second assembly is arranged on a lower die seat; a first assembly is arranged on a second assembly; the die holes of a first lower die and a second lower die are combined to form into a lower die cavity; a cushion block and a discharging plate are detachably connected with a first pre-stressed ring; a convex die is arranged in the lower die cavity; the connection part of the convex die is arranged in a stepped through hole of a fixing plate of the convex die; and the fixing plate of the convex die is detachably connected with the cushion block and an upper die seat. The method comprises the following steps of blanking, turning, heating, extruding and annealing treatments, wherein the heating temperature is between 1100 DEG C and 1150 DEG C. With the adoption of the extrusion die and the method provided by the invention, the extrusion molding of inside and outside reduction blanks can be realized.

The invention discloses an asymmetric extrusion die and a blank formation method thereof. The asymmetric extrusion die comprises a male die and a female die; the male die comprises a top plate, a joint plate and an extrusion rod; the female die is of a circular truncated cone-shaped structure externally and is hollow internally, a die cavity is formed inside the female die and is sequentially divided into an extrusion-into section, a first asymmetric extrusion section, a uniform extrusion section, a second asymmetric extrusion section and an extrusion-out section from an extrusion inlet. According to the asymmetric extrusion die and the blank formation method thereof, one sides of blanks are extruded but the other sides of the blanks are not extruded through asymmetric extrusion channels, and therefore uneven shear deformation is generated, and shear deformation facilitates formation of equiaxial small grains of material under the effect of three-dimensional pressure stress; through the asymmetric extrusion effect of two opposite directions, the shapes of the extruded blanks are normal, the material is saved, and the energy consumption is lowered.

The invention provides a crucible and a preparation method thereof. The crucible comprises: a crucible body, a first coating, a second coating and a third coating, wherein the crucible body comprisesa bottom wall and a side wall; the first coating layer is arranged on the bottom wall and the side wall for preventing metal impurities from diffusing to crystalline grains in the crucible body, the second coating is arranged on the outside of the first coating layer on the side wall, the second coating layer is used to assist in nucleating the crystalline grains within the crucible body; the third coating is arranged on the outside of the first coating layer on the bottom wall, the third coating layer is used to assist in separating the crystalline grains within the crucible body from the crucible body. The crucible of the invention can effectively reduce diffusion of the metal impurities in the crucible body into polycrystalline crystals located in the crucible body, so that purity of the prepared polycrystalline silicon is high.

The invention relates to friction welding material adding equipment. The friction welding material adding equipment comprises a machine base, a rotating device, a shaft shoulder, an extrusion rod, a shaft sleeve and an extrusion device. The invention further provides a method for carrying out material adding manufacturing by adopting the friction welding material adding equipment. According to the friction welding material adding equipment, high-quality material adding manufacturing of metal materials such as aluminum alloy can be achieved, and the material utilization rate and the production efficiency are improved.

The invention relates to a multi-convex die step-by-step reverse extrusion forming method. A multi-convex die is composed of an inner convex die and an outer convex die, and steps of discharging, blank making, step-by-step reverse extrusion and subsequent processing are included. The multi-convex die step-by-step reverse extrusion forming method is characterized in that according to step-by-step reverse extrusion, the inner convex die and the outer convex die are used for extruding blank metal at least once, the blank metal generates flow deformation under the action of the multi-convex die, the stroke of the inner convex die and the outer convex die is controlled to obtain a hollow member with the bottom being the solid flat bottom or concave bottom or convex bottom. According to the multi-convex die step-by-step reverse extrusion forming method, in one die, forming manufacturing of the hollow parts with the flat bottoms, the convex bottoms, the concave bottoms and the like can be achieved; and the extrusion forming contact area is reduced, the extrusion forming force is reduced, and the amount of extrusion deformation can be improved.

The invention discloses a wire inserting mold of a motor stator iron core. The wire inserting mold comprises guide strips, a kidney-shaped base, a kidney-shaped cover plate, a connecting rod and a locking device. Slots are formed in the outer circumferential face of the base and the outer circumferential face of the cover plate at intervals respectively, one end of each guide strip is fixed to the corresponding slot in the base, the other end of each guide strip is in clearance fit with the interior of the corresponding slot in the cover plate, a through hole penetrating through the two axial end faces of the cover plate is formed in the cover plate, one end of the connecting rod is fixed to the axial end face, facing the cover plate, of the base, the connecting rod and the cover plate are integrally fastened through the locking device after the other end of the connecting rod penetrates through the through hole in the cover plate, and a dragging hook base connected with a wire dragging device is arranged on the axial end face, deviating from the cover plate, of the base. By means of the wire inserting mold, wire inserting of windings with various phases is carried out in a multi-time mode, and varnished wires in the windings are prevented from being damaged.

The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a low flow vent configured with a pressure equalizing configuration allowing for reduced extrusion forces along the low flow vent, allowing vertical movement of a float shaft at high valve gas pressures with reduced forces.

The lightning arrester comprises a shell, an insulating cylinder is arranged in the shell, a plurality of resistor discs are stacked in the insulating cylinder, at least one end of the insulating cylinder is provided with springs matched with the resistor discs in a jacking mode, and the resistor discs are divided into at least two resistor disc sets which are sequentially arranged in the stacking direction. A supporting pad is arranged between any two adjacent resistor disc groups, the supporting pad is a conductor, the supporting pad is adaptively arranged in the insulating cylinder, and the supporting pad is supported on the cylinder wall of the insulating cylinder when the insulating cylinder is transversely arranged. Compared with the prior art, when the lightning arrester is horizontally placed and transported, the damage of the resistor disc caused by vibration generated during transportation can be avoided, and the damage of the lightning arrester caused by the damage of the resistor disc can be avoided.

The invention provides an extruding terrace die which is formed by assembling a pre-diverging die, a wedge pressing die and a terrace die core shaft. Firstly, the pre-diverging die is used for realizing the pre-distribution of metal plastic flow volumes, reducing the remain of forged pieces and increasing the utilization rate of materials; the wedge pressing die compels a metal to plastically flow under the action of the wedge pressing force, and as the plastic flow process of the metal is added, the influence on the mechanical properties of the formed part caused by machining is avoided and the purpose of improving the mechanical properties of the formed part is achieved; the terrace die core shaft and a concave die are combined to form a closed cavity so as to restrain the further radial flow of the deformed metal, as a result, the contact area between the terrace die and the deformed metal is reduced and the extruding forming force is reduced.

The invention relates to a bicycle front fork shock eliminator locking device. The bicycle front fork shock eliminator locking device is arranged on a bicycle front fork and comprises an actuating device, a moving device and a locking device body. The actuating device can rotate and is arranged on the moving device in a sleeving mode. The locking device body comprises a deformable unit and a fixed unit. One of the deformable unit and the fixed unit is assembled on the actuating device, and the other one of the deformable unit and the fixed unit is arranged on the moving device. When the actuating device rotates, the deformable unit can be selectively switched between the locking state with squeezing of the fixed unit and the unlocking state without squeezing of the fixed unit so that the actuating device and the moving device can be set to the moving state with mutual actuation or the positioned state without mutual actuation. Accordingly, the bicycle front fork can selectively start or stop the front fork shock eliminating function.

The invention discloses a disposable tube core for a laryngoscope. The disposable tube core comprises a connecting terminal, a tube body, a positioner and a probe. The connecting terminal and the probe are fixedly connected at two ends of the tube body respectively, and the positioner slidably connected with the tube body is located between the connecting terminal and the probe; the connecting terminal comprises an audio connector; the probe electrically connected with the audio connector is used for acquiring image information; the frictional resistance between the positioner and the tube body prevents the positioner from sliding relative to the tube body to realize positioning; the tube body is flexible; the audio connector is connected with a connector of an external display device, andis used for transmitting the image information acquired by the probe to the display device for observation by medical staff. In the working process, the outer wall of the tube body is bent after being squeezed by the inner wall of the throat, the tube body is inserted along the throat to reduce the squeezing force on the inner wall of the throat, and operations such as shaping and epiglottis bypassing are facilitated.

The invention discloses a tunnel diversion system suitable for a water-rich stratum and a construction method. The tunnel diversion system comprises an annular channel steel structure which is arranged between two truss I-shaped steel of a primary support and corresponds to the outline of a tunnel. Water outlets in the two ends of the annular channel steel structure communicate with the center drainage ditch through the side wall water collecting wells and the transverse buried grooves in sequence. In the tunnel excavation process, it is found that strand-shaped water flows out of the surrounding rock surface or the primary support surface, a water outlet and drainage groove can be formed between two truss I-shaped steel in front of and behind a concentrated water outlet point, and an annular channel steel structure is arranged in the drainage groove for water drainage. According to the method, construction is simple, pre-judgment expanding excavation is not needed, universality is high, the annular channel steel structure is buried in the gap between the two truss I-shaped steel for drainage, the annular drainage capacity of the tunnel and the reliability of the drainage structure are greatly improved, the drainage requirement of the water-rich stratum tunnel can be effectively met, and practicability is high.

The invention discloses a composite metal plate, which comprises a shell, wherein the outer shell comprises a first shell and a second shell; and the left side upper end and the right upper end of the first shell are each provided with a groove, and the inside of the two grooves is slidably mounted with a fixing part, the upper end of the fixing part is fixedly connected with the second shell, the inside of the shell is provided with a shock absorber, and the hollow composite metal plate is divided into two parts, and a buffer space is reserved between the two shells, and the shell is supported by adding corrugated paper and arc elastic plate, so as to reduce the pressing force of the plate and avoid the deformation.

The invention discloses an ear acupuncture magnetic therapy health device. The ear acupuncture magnetic therapy health device comprises two magnet units having an embossed cross section, wherein one end of the magnet unit protruding outward is an N pole, and the other end of the other magnet unit protruding outward is an S pole. The ear acupuncture magnetic therapy health device has the advantagesof small volume, light weight, convenient carrying, simple structure, convenient use and no pain, low cost and high comfort, and no need of a professional physician, a user can complete the treatmentby self-operation, and the effect is obvious.