53results about How to "Resolve rebound" patented technology

The invention relates to a bending die with swing male dies. The bending die with the swing male dies comprises an upper die, the swing male dies, a workpiece ejector and a female die. The workpiece ejector is columnar and fixed to the lower surface of the upper die. The upper die is provided with two male die grooves. Each swing male die is arranged in the corresponding male die groove. The two swing male dies are arranged oppositely. The female die is provided with two grooves corresponding to the swing male dies. The two sides of the female die are each provided with a boss. After the structure is adopted, the bending die with the swing male dies is simple in structure, convenient to operate, high in working efficiency and capable of effectively solving the problem that bent parts rebound.

The invention discloses a U-shaped rivet joint, which is characterized in that the rivet joint takes a shape of an inverted U-shaped structure, a bayonet is arranged downwards, the lower end of the tail of the rivet joint is provided with a connecting hole, and the side wall which is axially opposite to the connecting hole is provided with a screwed hole. The invention also discloses a connector used for connecting the U-shaped rivet joint and a rivetter, which is characterized in that the connector takes a shape of a column-table structure, the head of the connector is a column which is provided with a key slot and in transition fit with the connecting hole on the U-shaped rivet joint in a transition way, the tail of the connector is a round table which has one concave station respectively at the left side and the right side which are matched with two bosses at the tail of the U-shaped rivet joint, and the radial center of the round table is provided with a screwed hole. As the bayonet of the U-shaped rivet joint can escape from the non-open part, the riveting of the non-open part can be realized; the U-shaped rivet joint and the connector adopt the transition fit connection, as the two can move relatively, the rebound problem of the rivet joint can be solved.

The invention discloses a large-diameter PVDF pipe elbow forming process. It includes the steps of blanking, heating, continuous heating, bending, cooling and reclaiming. The invention adopts a constant temperature method to heat the PVDF pipe material in a continuous rolling manner, so that the inside and outside of the pipe are heated fully and evenly. By controlling the temperature of the pipe to be heated and softened, the bending method of the filler is used when the pipe is bent, which effectively controls the distortion of the cross-sectional shape of the pipe when it is bent. Defects such as wrinkling and large cross-sectional thickness error; and through effective control of the ambient temperature, the heating temperature of the pipe, the preheating temperature of the mold and the filler, the size of the pipe after bending and forming is kept consistent; in addition, after bending and forming The bent pipe is kept in the mold for heat preservation process. Through the control of temperature and time, the internal stress is eliminated, and the springback problem of the pipe can be effectively solved, so that high-quality PVDF bent pipe can be manufactured, which is suitable for various occasions.

The invention discloses middle frame shaping equipment and a middle frame shaping method for an electronic product. The equipment comprises an upper mold plate and a lower mold plate; a middle frame blank part is shaped when the upper mold plate and the lower mold plate are assembled; the equipment further comprises upper pressure needle arrays which are distributed at the bottom of the upper moldplate, and / or lower pressure needle arrays which are distributed at the top of the lower mold plate; and the upper pressure needle arrays and / or the lower pressure needle arrays comprise a pluralityof columnar pressure needles which are arranged in a spaced manner so as to provide a plurality of dispersed stress contact points for the shaped middle frame blank part. The middle frame shaping equipment and the middle frame shaping method for the electronic product achieve a good shaping effect on a middle frame product and are high in precision and relatively low in cost.

The invention discloses a mold for hot bending and forming trough type solar concentrating collector parabolic mirrors and a manufacturing method thereof. The mold comprises a plurality of support plates and a support plate fixing device, wherein the plurality of support plates form a trough-shaped space fixing structure through the support plate fixing device; the support plates are sunk part structures obtained by cutting a whole steel plate according to a parabolic mirror molded line; a plurality of open slots are formed in cutting end faces of molded line sides of the support plates; corresponding formed steel pipes are arranged in the open slots corresponding to the adjacent support plates; the formed steel pipes are fixedly arranged tangent to end openings of the open slots through a steel pipe fixing device. The mold is simple in structure, reasonable in design and simple to manufacture, and is capable of effectively reducing production energy consumption and efficiently hot bending and forming glass of trough type parabolic mirrors.

The invention provides a self-flow castable wet-spraying machine and a wet-spraying method based on the wet-spraying machine. According to the distance from a construction site to the wet-spraying machine, a conveying pressure is adjusted; a blanking valve is adjusted to determine blanking quantity, and a water injection pump is started to determine water injection amount; a secondary stirring motor is firstly started, then a primary stirring motor is started, and materials are put and stirred; an air source pressure is adjusted to reach 0.5 MPa, and a coagulant conveying mechanism normally operates; after the materials are fed into a secondary stirring feeding hopper, the materials are further confirmed, a conveying button is turned on after no error is confirmed through checking, and a material pumping unit begins to work and convey materials. The wet-spraying process is compared with a dry-spraying process, the material rebounding problem in dry spraying is solved, resources are saved, and a site construction environment is obviously improved. By comparing the wet-spraying process with the dry-spraying process, formwork links are saved, the mechanization and automation degree of production is remarkably improved, labors are liberated from a 'dirty, hard, tiring and dangerous' working environment, and the construction time is greatly shortened.

The invention discloses a small diameter PVDF pipe elbow forming process. Including blanking, heating, continuous heating, bending and cooling steps. The invention adopts a constant temperature method to heat the PVDF pipe material, so that the inside and outside of the pipe are fully and evenly heated. By controlling the temperature of the pipe to be heated and softened, the pipe is bent by one-time extrusion molding with filler bending, which effectively controls the cross-sectional shape of the pipe when it is bent. Distortion, wrinkling, and large errors in cross-section thickness; and through effective control of the ambient temperature, the heating temperature of the pipe, and the preheating temperature of the mold and filler, the size of the pipe after bending and forming can be kept consistent; in addition, the bending made After molding, the bent pipe is kept in the mold for natural cooling. Through the control of temperature and time, the internal stress is eliminated, and the springback problem of the pipe can be effectively solved, so that high-quality PVDF bent pipe can be manufactured, which is suitable for various occasions. application.

The invention relates to installation equipment for a radiator water chamber of a combustion engine, in particular to a roller press for installing the radiator water chamber of the combustion engine. The roller press comprises two case bodies which are arranged side by side. Longitudinal guide rails are arranged in each case body. The longitudinal guide rails in each case body are connected with a longitudinal sliding plate in a slidable mode. A transverse sliding plate is arranged on each longitudinal sliding plate. One end of each transverse sliding plate is connected with a rolling wheel. The other end of each transverse sliding plate is connected with a cam mechanism which is used for driving the transverse sliding plate to feed in the transverse direction. The longitudinal sliding plates do reciprocating motion along the longitudinal guide rails through driving mechanisms which are connected with the bottoms of the longitudinal sliding plates. The driving mechanisms in the two case bodies are connected through a second chain wheel and chain transmission mechanism. Any driving mechanism is connected with a motor through a first chain wheel and chain transmission mechanism. A main slice to be pressed and the water chamber to be pressed are arranged between the two case bodies and are formed by the rolling wheels on the two case bodies through rolling. The rolling wheels of the roller press can run automatically, can automatically complete press fitting to the main slice and the water chamber, can automatically stop after rolling is completed, and can work in a reciprocating mode. The roller press is free from empty running strokes and high in working efficiency.

The invention relates to a lamina lifter, which effectively solves the problem that the rongeur is inconvenient to use, difficult to operate, and poor in effect during the operation of opening the door and opening the lamina in posterior cervical surgery, and the lamina tends to rebound when it is lifted , leading to the problem of dangerous accidents, the hook body has a free end and a connecting end, the length of the free end of the hook body is less than the length of the connecting end, the top of the hook body is flat, the connecting end of the hook body and the handle are connected in a V shape, V-shaped The opening and the opening of the hook body are in opposite directions, and the free ends of the handle and the hook body are respectively placed on both sides of the connecting end of the hook body. The problem of springback when opened avoids the occurrence of medical accidents and improves the safety of surgery.