31results about How to "Reduce springback" patented technology

The invention relates to a reel-to-reel hot rolling forming device for fine structures of polymer thin film products. The device is characterized by comprising a frame, an unwinding module, a preheating module, a forming / shape-preserving module, a tensioning force adjusting module and a winding module, wherein the frame is mechanically connected with the preheating module, the forming / shape-preserving module and the tensioning force adjusting module; the tensioning force adjusting module is connected with the forming / shape-preserving module; being unwound by the unwinding module, a to-be-processed thin film substrate is heated by the preheating module, then enters into the forming / shape-preserving module for hot pressing and cooling formation, is imprinted, and is finally wound around the winding module. Compared with the prior art, the reel-to-reel hot rolling forming device has the advantages that the joint degree between the substrate and a mould during shape preserving and cooling processes is enhanced; the microstructure resilience on the surface of a thin film is reduced; the forming precision is improved; and suitability for mass production of large-area thin film devices is achieved.

The invention relates to the technical field of protective films, in particular to a protective film capable of not rebounding after being hot-pressed and a preparation method thereof. The protective film comprises a protective film layer, a protective glue layer, a using film layer and a stripping film layer which are sequentially attached from top to bottom; the using film layer comprises a UV hard glue layer attached to the lower surface of the protective glue layer, a first UV soft glue layer attached to the lower surface of the UV hard glue layer, a substrate layer attached to the lower surface of the first UV soft glue layer, a second UV soft glue layer attached to the lower surface of the substrate layer and a stripping glue layer attached to the lower surface of the second UV soft glue layer, and the lower surface of the stripping glue layer is attached to the upper surface of the stripping film layer. The protective film has the good hot-press molding property and is high in sizing capacity after being hot-pressed.

The invention belongs to the technical field of rivetless riveting, and in particular relates to a device and method for riveting martensitic steel plates without rivets. The device includes: an upper mold, a lower mold, a punch, a holder, an upper laser heater, a lower laser heater, a thermistor and a cooling water channel. The centers of the upper mold and the lower mold are provided with through holes. The upper mold and the lower mold are symmetrically arranged on the upper and lower sides. Both the head and the support head can move freely in their respective through holes. The upper laser heater is set on the bottom surface of the punch, the lower laser heater is set on the top surface of the holder, the upper mold and the lower mold are equipped with thermistors and cooling channels, and the punch is close to the upper laser heater. A cooling water channel is also provided at the position of the support head and the position close to the lower laser heater. The rivet formed by the above-mentioned device and the underlying material are interlocked to ensure high connection strength.

The invention relates to an electromagnetic braking system for a rapid compressor. The electromagnetic braking system comprises a central control unit, a braking cylinder made of a magnetic separationmaterial, a pushing rod penetrating through the braking cylinder, an electromagnetic braking circular ring fixed to the braking cylinder, an electromagnetic braking piston fixed to the pushing rod, afirst light shading plate, a second shading plate, a photoelectric sensor and an electromagnetic braking control circuit, wherein the first light shading plate and the second shading plate are fixedto the pushing rod, and the photoelectric sensor is fixed nearby the pushing rod. Circumferentially-wound electromagnetic coils are embedded on the electromagnetic braking circular ring and the electromagnetic braking piston correspondingly; the two light shading plates are fixed to the corresponding positions on the pushing rod when baking needs to be started and needs to be completed, the distance between the two light shading plates is equal to the braking distance l, and the photoelectric sensor is arranged at the first light shading plate when braking is started; and the photoelectric sensor sends detection signals on the two light shading plates into the central control unit.

The invention discloses a method for manufacturing an artificial heart valve stent, which solves the problem of manufacturing errors in the mechanical manufacturing of the valve stent in the prior art, and has the beneficial effects of convenient processing and accurate manufacturing of the valve stent. The specific solutions are as follows: 1. A method for manufacturing an artificial heart valve stent, comprising selecting a valve prototype reference plane, and modeling based on the selected valve prototype reference plane; creating a model according to the valve prototype reference plane according to the valve leaflet distribution of the artificial heart valve stent, and using half of the valve prototype reference plane to create a model. The space intersection line of the inverted conical surface and the rotating surface whose apex angle is the set angle is the reference valve stent curve, and the single leaflet shape is obtained by combining the height of the leaflet, the free edge of the leaflet and the plane angle of the joint; Copy, make each valve leaflet evenly distributed at a set angle, complete the modeling of the artificial heart valve stent, convert the built model into the file required by the printer, and input the file into the printer; print through the printer.

The application relates to an auxiliary device for opening and closing an electronically controlled door, which includes a door body and a frame body. A through hole matching the door body is opened on the side of the frame body. The hinge covers the through hole, the side of the frame body away from the hinge is provided with a trigger component, the side of the frame body away from the hinge is provided with a slot, and the door body is provided with a linkage component and a locking component. The component is connected with the locking component. When the door is closed, the door body moves and abuts against the trigger component, the trigger component moves and abuts against the linkage component, and the linkage component moves synchronously and drives the locking component to screw into the slot. The application has the effect of being convenient for the electric control door to lock the door.

The invention discloses a shock hydraulic composite forming process for a small feature part of a complex part. The shock hydraulic composite forming process is a new forming process which intersects with a shock forming technology and a hydroforming technology and extends and develops from both of the two technologies, having advantages of both of hydro plastic forming and shock energy forming. The shock hydraulic composite forming process is defined as follows: performing the shock forming after the hydroforming is finished, utilizing momentarily released high energy of a shock source to compress high pressure liquid in a forming liquid room to obtain a surged pressure value which is transmitted to formed blanks in form of shock waves, so as to perform the new manufacturing process of elasticoplastic deformation of the part. Due to one-step installation, processing procedure is reduced, which helps to realize monolithic forming of a complex large curved surface part and guarantees positional accuracy of complex parts with various sizes. Meanwhile, the shock time is very short, which reduces requirements in terms of intensity and tightness of the device. The shock hydraulic composite forming process has a wide application prospect in fields such as aeronautics and astronautics, and automobile in aspects of forming, reforming and the like of large complex components with small feature sizes such as small convex hull, small pressing mark, and small holes.

The invention relates to the technical field of cooling devices, in particular to a cooling fin and an air cooling structure. The cooling fin includes: a base plate; supporting ribs formed by extending from the surface of the bottom plate to the direction far away from the bottom plate; and a first assembly part or a second assembly part which is suitable for being connected with the second assembly part or the first assembly part on another adjacent cooling fin in a clamping mode. According to the cooling fin, the heat dissipation area can be increased, forced air cooling resistance can be reduced, the heat dissipation amount is further increased, the cooling fin can be combined and assembled in an end-to-end connection mode, an air cooling heat dissipation channel can be conveniently formed, and the machining difficulty of an integral radiator is reduced.

The invention discloses a forming mold of a vehicle tubular punching welding part. The forming mold comprises a lower mold module and an upper mold module; an edge punching mechanism (4), an interval punching mechanism (5), a punching forming mechanism and a shearing forming mechanism (12) are straightly arranged between the upper mold module and the lower mold module in sequence; a product blank plate (1) passes through the edge punching mechanism (4), the interval punching mechanism (5), the punching forming mechanism and the shearing forming mechanism (12) in sequence for blanking formation; upper molds of all mechanisms are all connected to the same one upper mold plate as a large upper mold plate (2), and lower molds of all mechanisms are all connected to the same one lower mold plate as a large lower mold plate (3); the large lower mold plate (3) is fixedly connected to a worktable; and the large upper mold plate (2) is fixedly connected to an output end of a driving part slidingly connected with an equipment frame. After the structure is adopted, the production efficiency is greatly improved, and meanwhile, the number of operators is largely reduced, so that the production cost is reduced.

The invention provides a method for preparing bamboo tableware with homogenized bamboo slices. Every 2 to 3 vascular bundles in the straight direction is used as the basis for opening, drying, cutting, punching into tableware blanks, and molding. The process is: closing the mold, and opening the contact surface between the mold and the cut bamboo pieces. Steaming holes, Under the water vapor of 0MPa and the temperature of 100°C, the cut bamboo pieces are steamed with steam, and then the tableware shape is molded to complete the surface steaming and fast pressing. The mold is water-cooled and cooled to 90° C. to 100° C., and then polished, cleaned and packaged to obtain bamboo slices homogenized bamboo tableware. The invention reduces product specification differences, improves product use performance, and solves the problem of product cracking caused by insufficient performance of bamboo strips on the yellow side of the bamboo.

The invention discloses a small fast compressor based on electromagnetic control, which is mainly composed of a main combustion chamber system, a power system and an electromagnetic control circuit. The main combustion chamber system consists of a gland and a two-layer sleeve, and heat transfer oil flows through the gap between the two sleeves to heat the combustion chamber. The power system includes a cylinder block, a power cylinder gland, a brake ring, a power piston, a drive ring and a laser distance sensor. The laser ranging sensor measures the distance through the center hole of the power cylinder gland, and thereby realizes the control of the compression process. The electromagnetic control circuit includes a DC power supply, a sliding rheostat and five switches. The DC power supply provides current; the sliding rheostat is used to adjust the circuit current, thereby changing the magnitude of the electromagnetic force between the coils; the three switches are used as on-off switches for the circuit, and the other two Together as a switch, they are responsible for changing the direction of the current flow in the coil, thereby changing the direction of the electromagnetic force. The fast compressor of the present invention has a simpler and more compact structure and a more efficient working process.

The invention relates to a control method based on an electromagnetic braking system of a fast compressor. The applicative electromagnetic braking system of the fast compressor comprises a central control unit, a braking cylinder made of a magnetic separation material, a pushing rod penetrating through the braking cylinder, an electromagnetic braking circular ring fixed to the braking cylinder, anelectromagnetic braking piston fixed to the pushing rod, a first light shading plate, a second shading plate, a photoelectric sensor and an electromagnetic braking control circuit, wherein the firstlight shading plate and the second shading plate are fixed to the pushing rod, and the photoelectric sensor is fixed nearby the pushing rod. The control method comprises the following steps that the braking distance l is estimated preliminarily according to the magnitude of a current capable of being provided, electromagnetic force between two electromagnetic coils and the initial velocity v of apushing rod combination during braking, a small part of restore distance delta l is still formed between the piston and an upper stop point after braking is completed, the electromagnetic braking piston and the electromagnetic braking circular ring are further fastened, the two second shading plates and the photoelectric sensor are mounted, and when braking is started, the distance between the twoelectromagnetic coils meets the formula of L=l+delta l.