53results about How to "Resolve rebound" patented technology

The invention relates to a resilience control method for the moulding top surface of a car roof. The method is used in the process of punching and forming a set of moulds of a full car roof and a skylight car roof, and includes the step of respectively punching a full car roof workpiece and a skylight car roof workpiece by selecting the common mould by N steps of working procedures, N is an integer larger than zero, the moulding surface of a mould core of the common mould is a first compensation moulding surface, and the shape of the first compensation moulding surface is identical with the shape of a punched moulding surface in any working procedure in the N steps of working procedures of punching the full car roof workpiece and the skylight car roof workpiece before resilience; and after the N steps of punching working procedures are accomplished, at least one mould core and one stripper plate of the mould are replaced, a new mould core and a new stripper plate are used for punching the skylight car roof workpiece by M steps of working procedures after replacement, M is an integer larger than zero, and the resilience volume of the skylight car roof workpiece is different from the resilience volume in the N steps of punching working procedures.

The invention discloses a method and a device for forming plates through gradual approximation bending on a three-dimensional numerical control plate bending machine (1). The method comprises the following steps of: performing targeted iteration gradual approximation bending by utilizing a resilience rule of a plate (5), comparing a shape of an actually formed curved surface B of the plate (5) subjected to pressing resilience with a shape of a theoretical target curved surface S through online measurement, and setting an approximation bending pressing curved surface C for limited approximation pressing according to an error offset value h after resilience. By the device, an online laser three-dimensional coordinate measuring instrument (4) connected with a computer is arranged on the three-dimensional numerical control plate bending machine (1). Complex mechanical calculation is not needed, the problem of bending resilience of a ship plate can be rapidly solved on line in real time, as long as the approximation bending pressing is performed for 1 to 3 times generally, the requirement on machining accuracy can be met, the problem of resilience of a numerically controlled bent plate is rapidly and effectively solved, the forming accuracy of a three-dimensional curved surface ship plate is guaranteed, and the method and the device have simple and rapid effects.

The invention discloses a method for straightening the flame of a large-deformation automobile drive axle housing. The method is characterized in that a deformed axle housing is put on a detection platform to measure the axle housing deformation; sand is fully filled in an inner cavity of the deformed axle housing, the deformed axle housing is sealed and is then put on a 'V'-shaped piece fixed bearing, the other parts of the deformed axle housing are kept suspended in the air, the back side of a working surface of the deformed axle housing is put upwards, and loading application force points for assisting the straightening are positioned on two end positions, at which an axle housing spring seat assembly is installed; and heating wires which have the same length and width and are symmetrically distributed are marked on the axle housing along the longitudinal direction sequentially, acetylene flame is used to move from one ends to the other ends of the heating wires to heat, after each heating is completed, water is adopted to cool the axle housing, and flame heating and loading force applying are repeatedly carried out until the axle housing deformation reaches the tolerance allowed range of the axle housing design. By the method, the material shaping reserve consumption can be effectively avoided, and accordingly, the reutilization ratio of the large-deformation drive axle housing is increased.

The invention discloses an electromagnetic repulsion mechanism built through angle steel. The electromagnetic repulsion mechanism is characterized in that a permanent magnet mechanism is arranged at the left side of an angle steel frame; a plurality of vacuum contacts are arranged at the right side of the angle steel frame; a rotating angle steel mechanism is arranged at the upper end of the anglesteel frame; a movable iron plate is arranged at the left side of the rotating angle steel mechanism; the permanent magnet mechanism is arranged at the lower part of the movable iron plate; a plurality of movable conducting rods are arranged at the right side of the rotating angle steel mechanism; the lower end of each movable conducting rod is opposite to one vacuum contact; a plurality of repulsion mechanisms are arranged on the angle steel frame; and each repulsion mechanism is located between the plurality of movable conducting rods and the plurality of vacuum contacts. An original repulsion mechanism is improved, so that repulsion coil epoxy boards of the repulsion mechanism are uniform in stress, springback when the movable conducting rods and the vacuum contacts are opened and closed is avoided and the influence on the life of the vacuum contacts is reduced; and meanwhile, the electromagnetic repulsion mechanism has the characteristics of being high in strength, good in reliability and beneficial to assembly.

The invention discloses a self-locking bending machine and a machining process thereof, and relates to the technical field of plate machining, the self-locking bending machine comprises a mounting assembly, the mounting assembly comprises a workbench and an outer frame, the outer frame is located above the workbench, and the outer frame and the workbench are fixedly connected through a supporting rod; the two sets of air cylinders are symmetrically arranged on the inner top of the outer frame; and the self-locking assembly comprises two rectangular frames fixedly arranged in the outer frame, and the rectangular frames are sleeved with movable shells in a sliding mode. When the air cylinder moves to the minimum distance or the maximum distance, the mounting shafts can be pushed to enable the mounting plates to rotate, so that the pressing shafts and the rolling wheels enter the limiting openings, one of the mounting plates is in a horizontal state, the movable shell is in a self-locking state, and the situation that a material plate rebounds and a cutter falls off due to damage of the air cylinder is effectively prevented.

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 relates to the field of downhole pressure dividing tools for fracturing oil and gas fields, and particularly relates to a bridge plug with a sand production prevention function for fracturing and a using method thereof. The bridge plug comprises a center pipe, a seat sealing push cylinder, a base, a ball seat, a sealing rubber cylinder, a seat sealing cylinder, a locking part and anexplosive, wherein the outside of the center pipe is sequentially sleeved with the base, the locking part, the seat sealing push cylinder, the sealing rubber cylinder, the ball seat, the seat sealingcylinder and the explosive from bottom to top, the explosive, the seat sealing cylinder, the ball seat and the sealing rubber cylinder are in contact with each other, the lower end of the seat sealingpush cylinder is in contact with the locking part and is located in the locking part, the top end of the seat sealing push cylinder is located in the sealing rubber cylinder, and the inner circumferential surfaces of the explosive, the seat sealing cylinder, the ball seat, the sealing rubber cylinder and the seat sealing push cylinder are in clearance fit with the center pipe. According to the bridge plug, the problems of high-speed erosion damage of returned solid substance to a wellhead, an oil extraction pipeline and a gas pipeline and blockage of the inner diameter of a bridge plug by thereturned solid substance and the like are effectively solved, and the bridge plug capable of preventing blockage is achieved.

The invention belongs to the field of pipeline processing, and particularly relates to a pipeline part flaring punch die. The pipeline part flaring punch die comprises a die front section, wherein thedie front section is provided with a flaring part and an insertion part; a locking part is arranged between the flaring part and the insertion part; the size of the flaring part is larger than the internal size of a pipeline, and the size of the locking part is smaller than the internal size of the pipeline; and the pipeline sequentially passes through the insertion part, the locking part and theflaring part in the pipeline flaring process, and is subjected to flaring operation through the flaring part. The assembly consistency and positioning accuracy of assembly of the pipeline flared by the flaring die and a normal pipeline are effectively improved.

The invention belongs to the technical field of machining equipment, and particularly relates to a mold positioning device and a mold. The mold positioning device comprises a male mold fixing module, a female mold fixing module and a female mold fixing plate fixing module, the male mold fixing module is used for being connected with a male mold, and the female mold fixing module is used for being connected with a female mold; and the female mold fixing plate fixing module is used for being connected with a female mold fixing plate, the male mold fixing module is in contact connection with the female mold fixing module, and the female mold fixing module is arranged to be switched between a limiting state and a sliding state. According to the mold positioning device disclosed by the embodiment of the invention, the female mold fixing module and the female mold fixing plate fixing module are in limiting fit, so that product damage caused by the fact that a female mold rebounds to steal a main parting surface is avoided, and the quality of an injection product is ensured. Besides, the position of the female mold relative to a shifting plate is fixed, so that the gap between the female mold and the shifting plate is not changed, a manipulator can accurately enter the space between the female mold and the shifting plate to take out a rake, and the manipulator cannot be damaged due to interference.

The invention relates to traceless bending equipment. The equipment comprises an upper die and a lower die which are used for bending a metal plate; the upper die comprises an upper die plate, a sliding block seat and sliding blocks, the sliding block seat is fixed below the upper die plate in an up-down movable mode, the sliding blocks are arranged on the two transverse sides of the sliding block seat, bending punches are formed on the two transverse sides of each sliding block, and the sliding block seat moves up and down to drive the sliding blocks to move in the transverse direction; and the lower die comprises a base, a lower die plate fixed to the base, a precursor block arranged on the lower die plate and capable of moving up and down, a forming block arranged on the transverse outer side of the precursor block, a baffle fixed to the lower die plate and located on the transverse outer side of the forming block, and an elastic piece of which one end abuts against the baffle and which provides transverse elastic force for the forming block, a matching inclined surface is arranged on the transverse outer side of the precursor block, and the forming block is provided with a forming inclined surface corresponding to the matching inclined surface. Traceless bending can be achieved, and springback after bending is avoided.

The invention provides a three-layer composite floor. The three-layer composite floor sequentially comprises a surface plate, core plates and a bottom plate from top to bottom. The surface plate at least comprises a high-density layer and a transition layer from top to bottom. The average density, on the thickness cross section, of the high-density layer is 0.65-0.75 g/cm<3>, and the density, on the thickness cross section, of the transition layer is gradually decreased from the side close to the high-density layer to the side close to the core plates. The high-density heavy layer and the transition layer are naturally connected in a same material mode. The three-layer composite floor has the characteristics that surface smoothness is good, the product stability is good, and surface wave traces are not prone to occurring.

The invention relates to a combined multi-connected sample preparation instrument of a remolded soil cutting ring sample and a sample preparation method. The combined multi-connected sample preparation instrument comprises a sample pressing device and a pressurizing device, and the sample pressing device comprises a base, a cutting ring, an extension cylinder, a sample pressing piston and a combined body. A sampling groove, an exhaust hole and other parts are arranged on the base. During use, a permeable stone is placed at the upper part of the base, so that gas contained in a loose soil sample can be effectively discharged. The extension cylinder comprises an upper hoop cylinder and a lower positioning ring, the inner diameter of the hoop cylinder is the same as that of the cutting ring, the inner diameter of the positioning ring is matched with the outer diameter of the cutting ring, and the extension cylinder is matched with the cutting ring for use, so that disturbance to a sample can be effectively reduced; the combined body is formed by combining the base and the sample pressing piston, simultaneous preparation of a plurality of samples can be achieved, and the sample preparation efficiency is improved. According to the invention, the defects of non-uniform remolded soil sample preparation, difficulty in demolding and sampling, sample rebound, incapability of performing subsequent test operation and the like at present are overcome, and a plurality of standard homogeneous cutting ring samples suitable for various indoor soil tests can be accurately, simply and quickly prepared at the same time.

The invention relates to the technical field of pipe fitting forming, in particular to a forming method of a flat pipe fitting. The forming method comprises the following steps that A, edge rolling isconducted, wherein a plate is bent and rolled, the two ends of the plate are welded, and the plate forms a closed ring body through a welding seam; B, radial forming is conducted, wherein a mold corematched with the preset shape of the pipe fitting is added into the welded closed ring body, then the side wall of the pipe fitting is pressed to make the radial section of the pipe fitting achieve apreset shape, and the welding seam is made to avoid the inflection point position of the closed ring body on the radial section in the process; and C, axial forming is conducted, wherein after the radial section of the pipe fitting is formed, the front end and the rear end of the pipe fitting are cut correspondingly to make the pipe fitting achieve a preset shape in the axial direction. Accordingto the forming method, the plate is connected into the closed ring body through the welding seam, the grinding amount is greatly reduced, the mold core is added into the pipe fitting, the interior and the exterior of the pipe fitting are formed simultaneously, the problem of part springback is solved, the workload of manual shape correction is reduced, the pipe fitting forming effect is better, the quality guarantee of products is enhanced while the production efficiency is improved, and mass production of the flat pipe fitting is achieved.

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.