585results about How to "Prevent springback" patented technology

A vehicular impact absorbing apparatus includes a pair of tubular guide rails having a guide slit longitudinally formed at the upper part of each guide rail fixed to the ground. Sliders are movably mounted in the guide rail at predetermined intervals, the upper part of each slider is laid on the upper part of the guide rail through the guide slit. Cushion units are mounted on the upper part of each slider. Each cushion unit is elastically deformed by vehicular impact while retracting along the guide rail. Cushion pins are mounted across the guide rails at predetermined intervals between the sliders that also absorb the kinetic energy of an impact by being broken by the rearward retracting slider. A stopper is installed around the rear end of the guide rail for stopping the retracting cushion units. A successive cushion and deceleration of the impact is possible in this arrangement.

The invention discloses a forming method of a titanium alloy thin-walled casing. The forming method comprises the steps as follows: a concave mold is fixed on the workbench of a press; a titanium alloy plate 0.2-4 mm in thickness is placed on the concave mold, a lining plate is arranged above the titanium alloy plate, and an edge pressing ring is placed on the lining plate; an electromagnetic coil is fixed on the sliding block of the press, and the electromagnetic coil is contacted with the edge pressing ring since the sliding block on the press runs downwards; the electromagnetic coil is subjected to discharge by adopting an electromagnetic forming method, the lining pate deforms under the action of the electromagnetic force generated by the electromagnetic coil and further prompts the formation of a titanium alloy plate film, and a titanium alloy thin-walled casing 0.2-4 mm in wall thickness is obtained. The forming method has a simple method and a good formation effect. Resilience of the titanium alloy can be effectively avoided by adopting the method to form the titanium alloy thin-walled casing, and finally, the titanium alloy thin-walled casing with high size precision is formed.

The invention relates to a method for manufacturing fast-growing wood sheet, in particular to a manufacturing method for modifying a fast-growing poplar board, belonging to the technical field of sheet manufacture. The invention has the advantages of small internal stress of a compressed carbonized poplar board manufactured by the method and good stability of the size of the board, thereby ensuring the quality of a compressed carbonized wood. The invention overcomes the defects of a fast-growing poplar sheet, such as low density, low hardness, low strength, easy corrosion, difficult direct use and the like, improves the density of the sheet by carrying out compression and densification for the poplar sheet, carries out carbonization on the compressed poplar sheet on the condition of pressurization, and eliminates the compression stress inside the sheet so as to prevent springback of the sheet and improve the size stability, density and strength. The poplar board manufactured by the method can be directly used as a sheet. The compressed carbonized poplar board can be partially or entirely used to replace high-quality precious wood, thereby relieving the contradiction between continuously reduced precious wood resources and increasing demand for wood.

The invention relates to multistage marine water quality stratified sampling equipment and a sampling method thereof. The multistage marine water quality stratified sampling equipment comprises a floating plate, a pay-off device and a sampling device, wherein the floating plate is of a rectangular structure, the pay-off device is installed at the upper end of the floating plate, the sampling device is arranged below the floating plate, and the sampling device is connected with the pay-off device through a steel wire rope. The problems as follows are solved: when the existing equipment is usedfor sampling the ocean water quality, the sampling effect is poor and the sampling is inaccurate, and stratified sampling cannot be effectively carried out on seawater with different depths, which isnot conducive to the study of ocean water quality; and the existing equipment cannot effectively seal the sampled seawater when sampling the ocean water quality, so that the sampled seawater is easilymixed with seawater in areas with different depths, the sample is inaccurate, and the accuracy of a water sample analysis result is influenced.

The invention discloses a plate warm electro-hydraulic high-speed impact-quasi static hydraulic composite forming device and a plate forming method achieved by adopting the device and relates to the field of metal material processing forming to solve the problems that forming of plates and complex parts is difficult, film attaching is poor, and deformation is not even. A vacuum pump is used for pumping out gas in a female die cavity; a fluid injection device is adopted for injecting high-temperature-resisting liquid to a liquid chamber; a heating device is used for heating the female die cavity, the high-temperature-resisting liquid in the liquid chamber is heated, preheating on a to-be-processed plate is completed, and heat preservation is conducted on the to-be-processed plate; an electromagnetic forming system is used for conducting discharging forming on the to-be-processed plate; high-pressure warm liquid is slowly injected into the liquid chamber under the quasi static condition, and quasi static hydraulic forming is conducted on the to-be-processed plate; and the high-pressure warm liquid in the liquid chamber is cooled to the room temperature within a period of time, waste liquid is recycled, an electro-hydraulic forming die is opened, and the to-be-processed plate is taken away. The device and the method are used for forming plates.

The invention relates to a method for producing highly dimensionally stable half shells from a cut board, wherein the half shell is pre-formed by deep-drawing in a first die (28, 46), optionally using at least one hold-down (56), wherein the first die (28, 46) has at least one stamp (48), one die floor (50), one die supporting surface (52) and a frame region and wherein the pre-formed half shell (30, 60) is then finally formed in a second die (34, 62), particularly in a calibration tool. In addition, the invention relates to a device for producing a half shell. The problem of specifying a method which simplifies the production of highly dimensionally stable half shells is solved in that the board is cut having a positive dimensional deviation in the specified tolerance range, in consideration of the desired final form of the pre-formed and finally formed half shell, before deep-drawing, the die floor (50) of the first die (28, 46) is moved relative to the die supporting surface (52), the board is clamped between the die floor (50) and the stamp (48) of the first die (28, 46) and the board is guided in being deep-drawn.

The invention relates to the technical field of peripheral equipment of a punch, in particular to a deflection type servo feeding line, which comprises an uncoiler, a transitional rack and a deflection type feeding host machine, wherein the deflection type feeding host machine comprises a main frame and an integral leveling and sizing host machine arranged on the main frame. A clamping feeding unit, a leveling unit and a sizing unit in the deflection type feeding host machine of the whole servo feeding line are integrated so as to reduce the occupied space, and the leveling and sizing operations of a plate are closely approached so as to improve the sizing accuracy and the acceptability of punched products. More significantly, the integral leveling and sizing host machine is integrally arranged on the deflectable deflection main frame, and the integral leveling and sizing host machine can be accurately controlled to deflect along the width direction of the plate according to the need so as to make the plate move in the width direction for a punch to stamp in the corresponding width direction, so the production efficiency is improved, the plate can be fully utilized, and plate waste is minimized.

The invention discloses a precise micro-forming device and a method thereof based on a laser continuous stamping plasticine technology. The device comprises a laser loading system, a plastic forming system and a computer control system. The laser loading system comprises a nanosecond laser, a reflection mirror and a focusing lens. The plastic forming system comprises a sample system, a clamp body, a three-dimensional moving platform and a base. The computer control system comprises a three-dimensional moving platform controller, a laser controller and a computer. According to the device and the method, plasticine is used for transmitting impact force, in a multi-time impact process, the plasticine and a workpiece are attached together gradually, stress on the workpiece is even, scratching cannot happen, surface quality of the workpiece is improved, and meanwhile according to the characteristic that the plasticine deforms in an plastic mode after being stressed, the workpiece and a micro mould can be attached with each other, rebounding of the workpiece is avoided, and forming precision of the workpiece is guaranteed.

The present invention provides a spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4 A made of a nickel alloy and an inner layer 4 B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4 B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.

The invention discloses an efficient damping device for mechanical equipment. The efficient damping device comprises a fixing plate and a fixing base, a fixing block is welded to the middle position of the top of the fixing base, a hydraulic driver is arranged at the middle position of the top of the fixing block, the top of the hydraulic driver is connected with the fixing plate through a stretchable rod, the tops of the fixing block are located on the two sides of the hydraulic driver and are connected with the fixing plate through second damping springs, and three sets of connecting rods are welded to the outer side of the fixing block at equal intervals. According to the efficient damping device, the bottom of a containing plate is connected with the fixing plate through a first damping spring, magnet blocks are arranged at the bottom of the containing plate and the top of the fixing plate, magnetic poles of the magnet blocks are opposite, meanwhile, the bottom of the fixing plateis connected with the fixing plate through the second damping springs, the damping effect is better due to multiple damping, the object vibration strength is reduced, and damage to objects and loadersis prevented.

The invention discloses a middle peeling device and peeling method for wire materials. The middle peeling device for the wire materials comprises an axial cutter set which is used for enabling axial incisions to be formed on the middle portion rubber of the wire materials and a radial cutter set which is used for enabling radial incisions to be formed on the middle portion rubber of the wire materials; the radial cutter set is also used for peeling the middle portion rubber of the wire materials from the wire materials along the axial incisions. According to the middle peeling device and peeling method for the wire materials, the rubber with peeled openings on the middle portions of the wire materials is directly cut off, so that rubber springing back caused by only forming the incisions is avoided and stability of the peeled openings is improved.

The invention provides a novel pipe pushing and pulling device. The device comprises a base, a pipe pushing and pulling mechanism and a walking mechanism are arranged on the base, the pipe pushing andpulling mechanism is rotatably mounted on the base, the walking mechanism comprises walking wheels and moving plates on the lower portions of the walking wheels, the walking wheels are connected withthe base through lifting hydraulic cylinders, and can completely shrink into the base, walking hydraulic cylinders arranged in the moving direction of the walking wheels are arranged on the moving plates, and two ends of the walking hydraulic cylinders are connected with the moving plates and the walking wheels. According to the technical scheme, through the lifting hydraulic cylinders, supporting stress of the walking wheels and the base can be switched, in cooperation with the walking hydraulic cylinders, stepping walking is achieved, the pipe pushing and pulling pipe mechanism is rotatablymounted on the base, a pushing and pulling mechanism is controlled to do 360-degree rotation in the horizontal direction, and multi-station pipe feeding of the pushing and pulling mechanism can be achieved.

The invention relates to the technical field of production device of metal plates, and particularly to a three-in-one straightening and feeding machine and straightening and feeding method thereof. A decoilder machine, a feeding machine, a straighter machine and a shear gauge are integrated in the three-in-one precision-type material-frame straightening and feeding machine. Compared with independent devices, the three-in-one precision-type material-frame straightening and feeding machine has the advantages that the occupied space is small, the next procedure of straightening sheet metal is cutting length so that the design of foundations or pits are not needed. The three-in-one precision-type material-frame straightening and feeding machine can be easy to install and shift and the time lag is short, so that the rebound caused by internal stress of metal plates which are straightened can be prevented and the deformation of the metal plates can be avoided. Accordingly, the accuracy of cutting length can be improved and the enterprise operating cost can be reduced greatly.

The invention discloses an ingot rod device for holding textile bobbins. The ingot rod device comprises a hollow rod body, openings formed in the rod body, three of more stretching and contracting components capable of stretching and contracting in the openings and a matched mechanism allowing the stretching and contracting components to stretch and contract. The stretching and contracting components comprise rods and are evenly distributed along the circumference, the matched mechanism makes the stretching and contracting component have the tendency of moving towards the interior of the rod body, and the ingot rod device further comprises a conical rod capable of being inserted into the rod body. The conical rod is inserted into the rod body, each stretching and contracting component moves toward the exterior of the rod body and exerts pressure on the inner wall of the corresponding bobbin continuously, and thus the function of folding the corresponding bobbin is achieved. By means of the ingot rod device, the bobbins different in inner diameter can be reliably fixed to a spindle, and normal operation of textile work can be maintained.

The invention discloses a multi-connection-rod jumping mechanism. The multi-connection-rod jumping mechanism comprises a rack, a multi-connection-rod mechanism, an elastic element, an energy storage assembly and a triggering device. The energy storage assembly is used for stretching the elastic element in a non-return mode. The triggering device can relieve the non-return function of the energy storage assembly to make the elastic element rebound. Resilience of the elastic element is used for driving the multi-connection-rod mechanism to be subjected to momentary deformation and pushing the multi-connection-rod mechanism to move upwards to achieve jumping through reactive force of connection rods and the ground during deformation. The multi-connection-rod jumping mechanism is simple in structure and capable of walking on a flat terrain and jumping when running into a barrier, ditches and other complex rugged terrains, and thus the passing performance of a robot is improved greatly.

The invention discloses an easy-to-tear type polypropylene packing bag and a manufacturing method thereof. The packing bag comprises a heat-seal layer which is made of polypropylene film through one-way orientation stretching. The manufacturing method comprises the following steps: firstly, polypropylene film which meets sanitary requirements is taken as the material, and one-way orientation stretching is performed to the polypropylene film after the polypropylene film is heated to 100 to 600 DEG C, and the stretch ratio is 1.1 to 5; secondly, temperature reduction treatment performed to the film which is processed through orientation stretching, concretely the temperature of the film which is processed through orientation stretching is quenched to the environment temperature; thirdly, corona treatment is performed to the film which is stretched, to ensure the surface tension of the film to be larger than 38 dynes, thereby a shaped easy-to-tear type polypropylene packing film is obtained, and is rolled; fourthly, the film is superposed on a required additional layer to obtain the wall layer of the packing bag, namely, a composite layer structure; and fifthly, the wall layer is folded and a plurality sides are sealed to form a bag shape with an opening to obtain a finished packing bag. When the packing bag is torn along the stretching direction of the heat-seal layer, the opening is in a straight-line shape.

The invention discloses a riveting pressing forming device for a cover plate of an automobile clutch booster. The riveting pressing forming device for the cover plate of the automobile clutch booster comprises a base plate, wherein a positioning base is arranged on the base plate; a positioning cylinder is arranged rightly opposite to the positioning base; a pressing block is arranged on the positioning cylinder; a riveting cylinder is arranged on the base plate; the output end of the riveting cylinder is connected with the riveting assembly; a pressing cylinder is arranged below the base plate of the corresponding riveting cylinder; the output end of the pressing cylinder is connected with the pressing assembly; the riveting assembly comprises an installing base and a hinging pressing head; the installing base is fixedly installed on the base plate; the hinging pressing head are hinged with the installing base and the output end of the riveting cylinder; an installing plate is fixedly arranged on the base plate; the end part of the riveting cylinder is hinged with the installing plate; the pressing assembly comprises a pressing plate; the pressing plate is fixedly connected with the output end of the pressing cylinder vertically; and the pressing cylinder is fixed below the base plate through a fixing plate. The riveting pressing forming device for the cover plate of the automobile clutch booster has good riveting quality; in the riveting process, the damage to an electrophoretic paint layer at a cover plate forming position is avoided; the consistency of products is good; and the production efficiency is high.