41results about How to "Solve the scratch" patented technology

The invention relates to a guide pipe submerged-arc welding positioning device and method. The guide pipe submerged-arc welding positioning device comprises a workbench, and a first butt joint mechanism and a second butt joint mechanism are arranged in a containing groove in the workbench; a first clamping mechanism and a second clamping mechanism are arranged on the upper end face of the workbench, a positioning mechanism is arranged on one side of the upper end face of the workbench, through fixing of a plurality of pressing blocks, it is effectively guaranteed that the first pipeline and the second pipeline are located on the same central axis, and accurate butt joint of the end faces of the first pipeline and the second pipeline is also guaranteed; and pipelines with different diameters can be fixed, so that the practicability is improved, and the functionality is increased.

The invention discloses a polishing cloth trepanning device and method, and relates to the technical field of polishing machines, the polishing cloth trepanning device comprises a bracket and an adjusting seat, the bracket is provided with a first cutter body, a cloth pressing body and an expansion body, the bracket is installed from the outlet end of a liquid guide hole of a polishing disc, the first cutter body is used for cutting the polishing cloth at the outlet end of the liquid guide hole, and the cloth pressing body is used for pressing the cloth at the outlet end of the liquid guide hole. The cloth pressing body is used for pressing the cutting edge of the polishing cloth into the liquid guide hole and abutting against the inner wall of the outlet end of the liquid guide hole. The adjusting seat is arranged from the inlet end of the liquid guide hole, and the adjusting seat is matched with the expansion body, so that the expansion body is tightly supported on the inner wall of the liquid guide hole after being matched, and the bracket is fixed in the liquid guide hole. According to the polishing cloth tapping device, accurate finishing and fixing of the polishing cloth at the position of the liquid guide hole are achieved, and the problems that the polishing cloth is degummed and a wafer is scratched due to improper manual finishing are effectively avoided.

The utility model discloses a hot pressing device, and belongs to the technical field of hot pressing equipment. According to the hot-pressing device, before hot pressing, a hot-pressed product can be placed on the lower hot-pressing block and descends along with the lower hot-pressing block, so that the hot-pressed product falls on the lower hot-pressing plate; after hot pressing, the lower hot-pressing block can lift a hot-pressed product on the lower hot-pressing plate, so that the manipulator can feed and discharge materials conveniently, and the hot-pressing plate, the manipulator and the hot-pressed product can be prevented from being scratched; the upper hot-pressing block can abut against the top of the product, so that the product is prevented from shifting when ascending and descending along with the lower hot-pressing block, the positioning precision of the product is guaranteed, and interference with a mechanical arm is avoided.

The utility model discloses a mine is poured and is sealed and is with display screen and battery's image processing camera of is safe type, including camera housing, the front end both sides symmetry of camera housing are equipped with the casing, the inside rotation -connected of two casing has the film winding drum, and the transparent protective film is wound between two film winding drums, through the cooperation of transparent protective film and replacement mechanism, the problem of secondary pollution, lens scratch caused by traditional cleaning brush is solved thoroughly. The protective film is always accurate to cover the lens area through the double restraint of guide roller and limiting groove on the limiting plate, and the continuous tension of the clockwork box is matched, so that the film body is flat and wrinkle-free, and the light transmission is stable. The integrated display screen and the key can display the shooting image, the equipment state and the parameter in real time, the operator can judge the shooting effect on site without exporting data, and invalid operation is reduced.

The invention provides a pipe bending assembly and a pipe bending machine, relates to the technical field of pipe bending machines, and solves the technical problem of low production efficiency caused by collision between a bending die and a bent pipe in the returning process after bending in the prior art. The pipe bending assembly and the pipe bending machine comprise a clamping assembly used for clamping a liquid inlet pipe; the bending assembly comprises a bending die, a bending die moving assembly and a bent pipe driving assembly, the bending die is connected with the bending die moving assembly, and the bending die moving assembly drives the bending die to move in a reciprocating mode so that the bending die can be close to or away from the liquid inlet pipe; the bending die moving assembly is arranged on the pipe bending driving assembly, and the pipe bending driving assembly drives the bending die moving assembly and the bending die to rotate by a preset angle so as to bend the liquid inlet pipe. According to the pipe bending assembly and the pipe bending machine, it is effectively guaranteed that the production progress is conducted normally, and the production efficiency is improved.

The utility model relates to the technical field of wire stripping equipment, and particularly discloses a wire stripping device, which comprises a charging seat, and a wire clamping structure and a wire stripping structure which are arranged on two sides of the top of the charging seat, the wire clamping structure comprises a fixing ring fixedly connected to the charging seat, a connecting seat which is arranged at the top of the fixing ring and is provided with an internal thread, and a fixing piece which is in threaded connection with the connecting seat and can extend into the fixing ring, the wire stripping structure comprises a wire stripping circular ring fixedly connected with the charging seat and a wire melting ring rotationally connected to the wire stripping circular ring, and an adjusting seat is fixedly connected to the wire melting ring; the adjusting seat is provided with a wire melting column with the position capable of being adjusted, the end portion of the wire melting column is provided with a heating head used for softening a cable, and the wire cutting device further comprises a cutting structure used for cutting the softened cable when the wire scraping ring is rotated, and the wire cutting device solves the problems that when an existing device is used for cutting, the cutting depth is not easy to control, and a metal wire is scratched.

The present invention relates to a cold rolling device with edge heating function in the field of aluminum strip cold rolling technology, comprising a mounting frame, wherein two working rollers for cold rolling materials are arranged at intervals on the inner side of the mounting frame, and the roller shafts of the working rollers are rotatably connected to the mounting frame, and the two working rollers are rollingly abutted against each other on the opposite sides thereof, and the roller shafts of the supporting rollers are rotatably connected to the mounting frame; it also comprises a power device capable of driving the working rollers to rotate, and a heating device for heating the corresponding ends of the working roller bodies. In the present invention, since the mounting member is correspondingly connected to the mounting groove, and the mounting groove is located on the end face of the working roller body, the mounting member is at least partially located inside the working roller body, so that the heat loss can be effectively reduced, and the technical problem of a large amount of heat being wasted in the prior art is solved, and the energy-saving effect is achieved, and the phenomenon of excessively high ambient air temperature will not occur.

The application discloses a kind of detection methods based on engine cold test machine's cylinder bore scratch, it is related to engine detection field, comprising: acquisition measured engine under constant speed condition Torque data, extract the maximum, minimum and average of the torque of each cylinder;When torque data is out of limit, determine target cylinder, and calculate the difference between its maximum and minimum, obtain single cylinder torque span value;If the span value exceeds the determination limit, then trigger exhaust back pressure test link, acquisition target cylinder single cylinder exhaust peak pressure;If the peak pressure is lower than the peak pressure of normal cylinder, and difference reaches abnormal drop threshold, then determine that there is cylinder bore scratch.The present application effectively amplifies weak fault signal by combining torque span feature and exhaust back pressure feature, without disassembly, cylinder bore scratch and pure mechanical bearing defect can be accurately distinguished, and the sensitivity and accuracy of online detection of mass production line are improved.

The utility model belongs to touch -sensitive screen laminating technical field's touch -sensitive screen laminating prevents the device of gold finger scratch. Including device body (1), be provided with open area (2) on device body (1), be provided with device through -hole (3) on the device body (1) of open area (2) periphery, be provided with device placement recess (5) on laminating machine mesa (4), device placement recess (5) bottom surface sets up vacuum through -hole (6), when the touch -sensitive screen laminating prevents the device of gold finger scratch is clamped in device placement recess (5), every device through -hole (3) and a vacuum through -hole (6) position correspond. The utility model discloses the touch -sensitive screen laminating prevents the device of gold finger scratch, simple structure, ensure that touch -sensitive screen gold finger part will not contact with any material in touch -sensitive screen laminating process, effectively solve gold finger scratch problem, improve the yield of touch -sensitive screen, and dismount and install easy, will not influence production efficiency.

The preparation method of the yellowing-resistant nylon particle composite material comprises the following steps: S1, weighing 100 parts by weight of nylon, and adding the nylon into a reaction kettle; s2, adding 2, 2, 2-trifluoroethanol as a solvent into the reaction kettle, and stirring to form a uniform nylon dissolving solution; s3, conveying the nylon dissolving solution into a spray dryer through a peristaltic pump, and performing atomization, drying and powder collection under the protection of nitrogen; s4, placing the powder in a vacuum drying oven, and drying at 25 DEG C for 3 hours to obtain nylon powder; s5, mixing the nylon powder with the following raw materials in parts by weight: 1-2 parts of an ultraviolet light absorber, 1-2 parts of a hindered phenol antioxidant, 2-4 parts of adipic acid, 0.5-1.5 parts of sebacic acid, 0.1-0.5 part of dicumyl peroxide and 8-10 parts of silane coupling agent modified mica powder; and S6, carrying out melt blending on the mixture obtained in the step S5 in a twin-screw extruder to obtain the yellowing-resistant nylon particle composite material.

This invention discloses a slitting device for producing narrow strips of aluminum, relating to the field of aluminum cutting technology. It includes a machine tool with a conveying unit assembly and a winding unit assembly. The conveying unit assembly conveys aluminum sheets, and the winding unit assembly winds the slit aluminum sheets into narrow strips onto the winding unit assembly. The machine tool also has a cutting unit located between the conveying unit assembly and the winding unit assembly. In this invention, by integrating the fan blade and the circular cutting blade onto the same primary drive shaft, the fan blade rotates synchronously with the blade to form a directional airflow. This airflow not only blows away electrostatically adsorbed debris from the blade surface, preventing the debris from scratching the aluminum sheet and increasing the defect rate, but also cools the blade, extending its service life.

The utility model belongs to the technical field of automobile machining, and particularly relates to an automobile metal basket forming device which comprises a workbench. The top of the workbench is rotationally connected with a guide wheel. A pair of guide wheels are symmetrically arranged at the top of the workbench; an adjustable bending assembly is arranged at the top, close to the guide wheels, of the workbench. The top, away from the guide wheel, of the workbench is provided with a sweeping assembly. The workbench is provided with a dust removal assembly through a cleaning assembly. In the step, the surface of the plate is swept through the sweeping assembly, and dust or foreign matter attached to the surface of the plate is sucked away through the dust removal assembly, so that a metal basket body forming structure with a cleaning function is formed, and the function that the plate is subjected to dust removal and cleaning before bending operation is achieved; the problem that dust or foreign matter adheres to the surface of the plate, and consequently the surface of the plate is scratched is solved, the cleanliness of the surface of the plate is improved, and the machining quality of the metal basket is improved.

The invention provides a motor rotor assembly tool which comprises a guide rod assembly, the guide rod assembly comprises a core rod and a sleeve, the sleeve is arranged on the periphery of the core rod in a sleeving mode, the hardness of the core rod is larger than that of the sleeve, the guide rod assembly is of a cylinder structure, one axial end of the guide rod assembly can be connected with a rotor, and the other axial end of the guide rod assembly can be connected with the rotor. The other axial end of the guide rod assembly is inserted into a shaft hole in the motor shell so that the rotor can be guided and pulled into the shaft hole, and the shaft hole comprises a shaft hole of a stator and a shaft hole of a bearing. According to the invention, it can be ensured that the whole assembly is not greatly bent due to forced reasons and the like, and the guiding effect on the rotor is improved, so that the assembly centering effect on the motor rotor is improved, and the situation that the rotor deviates from the center position and scratches a bearing is prevented; the problems that the rotor cannot be centered, so that the rotor deviates from the central position, and the rotor is scratched with a bearing are solved.

The utility model belongs to the technical field of cleaning equipment, and discloses a dust collection auxiliary device and a cleaning machine, the dust collection auxiliary device comprises a dust collection channel, a dust collection nozzle is arranged on the dust collection channel, the dust collection auxiliary device is arranged on the dust collection nozzle, the dust collection nozzle comprises a nozzle part, an adjusting part and a connecting part, one end of the connecting part is connected with the dust collection channel, and the other end of the connecting part is connected with the dust collection channel. One end of the dust collection auxiliary device is connected with the dust collection part, the other end of the dust collection auxiliary device is connected with the adjusting part, the adjusting part is connected with the nozzle part, and the dust collection opening of the nozzle part faces the passing substrate to collect dust. The suction force of the dust collection device is more uniform by arranging the air hole sheet; the guide wheel or the guide rod and the semicircular design of the dust suction port solve the problem that the surface of a product sucked by the dust suction device is scratched.

The invention belongs to the field of metallurgical industry automatic control, and relates to a method for improving the MRG speed of temper rolling of different steel grades, which is characterized by comprising the following steps of: 1, selecting supplied materials; 3, a temper mill brings in steel coil data from an uncoiler, a straightener straightens a steel plate, the temper mill selects a recoiling or leveling process mode, tension control is carried out on a feeding roller at an outlet, tension coiling of a coiling machine is completed, and trolley transportation is finished. When special steel varieties are rolled, L1 head and tail speed automatic adjustment control is input, the coil loosening phenomenon of a coiling machine is eliminated, the equipment failure time is saved, the problems of large gaps and scratches of steel coils are solved, the product surface qualification rate is increased, and good benefits are obtained. The method is suitable for being used in hot rolling leveling process control.

The utility model relates to the technical field of detection equipment, in particular to motor vehicle tail gas collection and detection equipment which comprises a tail gas detector and an extension hose, a runner pipe assembly is fixedly connected to one side of the extension hose, a fixing assembly is installed on the outer side of the runner pipe assembly, and the runner pipe assembly comprises a grip. The fixing assembly comprises a pull handle, a straight rod is fixedly connected to the left side of the pull handle, an extending block is fixedly connected to the left side of the straight rod, a moving cylinder is fixedly connected to one side of the extending block, an embedding hole is formed in the inner side of the moving cylinder, and a rubber sealing ring is fixedly connected to the inner side of the embedding hole. According to the tail gas detection device disclosed by the utility model, the inner wall of the exhaust pipe is prevented from being scratched through expansion type fixation, the tail gas detection device is suitable for various exhaust pipes, the loss is reduced, and a safe, reliable and economical tail gas detection scheme is provided.

The utility model provides a central bolt multi-section vibration assembly device, which relates to the technical field of central bolt assembly lines and comprises a support, a lifting positioning mechanism, a vertical vibration mechanism, a clamping vibration mechanism and a detection judgment module. The lifting positioning mechanism is arranged on the support, the vertical vibration mechanism is connected to the lifting positioning mechanism, and the clamping vibration mechanism comprises a clamping part and a high-frequency vibration part; the clamping part is fixedly connected to the vertical vibration mechanism, and the high-frequency vibration part is fixedly connected to the clamping part; and the detection and judgment module is fixedly connected to the clamping part. The utility model has the advantages that the reject ratio in the assembly process is reduced, and the problems that the product is scratched and the assembly is failed and abnormal due to a smaller gap between the sleeve and the valve core and the assembly is failed and abnormal due to the fact that the valve core spring cannot correctly fall into the spring groove are solved.

The invention belongs to the technical field of chip processing, and particularly discloses a wear-resistant rubber-coated fastening steel ring and a preparation method thereof, the wear-resistant rubber-coated fastening steel ring is applied to a fastening steel ring with an additional silica gel protection layer for grinding a silicon wafer CMP, the diameter of the fastening steel ring is 150-300mm, the thickness of the fastening steel ring is 1.5-4mm, the fastening steel ring comprises a steel ring body and the silica gel protection layer, and the silica gel protection layer is coated on the outer surface of the steel ring body. According to the wear-resistant rubber-coated fastening steel ring and the preparation method thereof disclosed by the invention, the wear-resistant rubber-coated fastening steel ring is applied to a fastening steel ring of an additional silica gel protective layer required by grinding a silicon wafer CMP, and the fastening steel ring and silica gel are combined as raw materials through a plate vulcanization method to prepare the high-performance silica gel-coated fastening steel ring for CMP grinding; a layer of product coated with silica gel is additionally arranged on the surface of the fastening steel ring, so that the fastening steel ring is physically isolated due to the coating of the silica gel when the fastening steel ring touches an external retainer metal ring, and the problem that the fastening steel ring is scratched is solved.

This utility model discloses an isolation device with an adjustable hinge, comprising: a three-sided sealing strip, an isolation plate, a connecting plate, and a hinge support frame. A hinge fixing member is provided on the lower end face of the isolation plate, and a hinge is provided on the hinge support frame. A first connecting hole is provided at the upper end of the hinge. A third hinge connector passes through the first connecting hole to fix the connecting plate to the isolation plate. The hinge fixing member has a first hinge connecting hole and a second hinge connecting hole. The first hinge connector and the second hinge connector pass through the first hinge connecting hole and the second hinge connecting hole respectively to fix the connecting plate to the isolation plate. The first hinge connecting hole and the second hinge connecting hole are oblong holes. The length of the first hinge connecting hole is greater than the diameter of the first hinge connector, and the length of the second hinge connecting hole is greater than the diameter of the second hinge connector. This application solves the problem of the sealing strip being scratched when the partition is opened due to hinge rotation by providing oblong holes in the first and second hinge connecting holes.

The utility model relates to the technical field of paper mounting machines, and discloses a paperboard feeding structure of a high-speed paper mounting machine, which comprises a side plate, a first support rod is fixedly mounted on the inner side of the side plate, a second support rod is fixedly mounted on the inner side of the side plate, and a deviation rectifying mechanism is arranged outside the first support rod. A paper feeding mechanism is arranged at the top of a first supporting rod, the position of a moving plate is conveniently adjusted by rotating a rotating wheel, so that the position of a deviation rectifying conveying belt is conveniently adjusted according to the size of corrugated paper, a motor is conveniently installed through an arranged motor installing frame, and through an arranged first chain wheel and an arranged second chain wheel, the paper feeding mechanism is convenient to adjust. According to the corrugated paper conveying device, the rotating roller is conveniently driven to rotate through the chain, so that corrugated paper is conveniently conveyed, under cooperation of the supporting plate, the first supporting roller and the second supporting roller, the deviation rectifying conveying belt is conveniently supported, and under cooperation of the paper pressing block, the paper pressing frame and the balls, the corrugated paper is conveniently limited.

The utility model discloses a positioning nut for high-pressure oil pipe detection, and belongs to the technical field of high-pressure oil pipe detection. A positioning nut for high-pressure oil pipe detection comprises a threaded connection portion, one end of the threaded connection portion is fixedly connected with a collimation portion, a first cavity is formed in the threaded connection portion, a second cavity is formed in the collimation portion, the first cavity is communicated with the second cavity, the second cavity is cylindrical, and the difference between the diameter of the second cavity and the outer diameter of a high-pressure oil pipe is not larger than 0.4 mm. The end, away from the threaded connection part, of the collimation part is fixedly connected with a protection pad, the hardness of the protection pad is smaller than that of the high-pressure oil pipe, a third cylindrical cavity is formed in the middle of the protection pad and communicates with the second cavity, and the diameter of the third cavity is the same as that of the second cavity. Whether the axis of the end of the high-pressure oil pipe is on the axis of the external bolt or not can be judged by arranging the threaded connection part and the collimation part at the end of the high-pressure oil pipe in a sleeving mode and rotating the threaded connection part to the external bolt.

The invention relates to a method for improving scratches on the surface of a heavily B-doped silicon wafer, which belongs to the technical field of silicon wafer processing, and comprises the following operation steps of: 1, proportioning an SC1 cleaning solution with the ratio of cleaning agent NH4OH to H2O2 being (1: 2)-(1: 3); 2, cleaning the silicon wafer before polishing to reduce the adhesion of particles on the surface of the silicon wafer; and 3, putting the silicon wafer into a waterwheel after cleaning, wherein the silicon wafer is immersed in the water level. And fourthly, before fine polishing, the mass ratio of the fine polishing liquid abrasive particles to the pure water is controlled to be (1: 15)-(1: 20). And fifthly, during fine polishing, the flow of the polishing solution is controlled to be 2-10 L / min, and the use time of the fine polishing cloth is controlled to be within 35 hours. The method has the advantages of convenient operation, high efficiency and good operation stability. The problem that the surface of the heavily-doped B silicon wafer is scratched is solved by reducing adhesion of particles on the surface of the silicon wafer and improving a fine polishing process during polishing.

The present invention discloses a laser cutting machine for sheet metal, which relates to the technical field of sheet metal processing, including a machine base, a material pushing assembly and a transmission assembly, wherein a material storage trough is provided in the machine base, a laser cutting assembly for cutting sheet metal parts is arranged in the machine base, an active roller is rotatably connected in the machine base, a support platform is arranged in the machine base, a plurality of material storage assemblies for placing sheet metal parts are vertically and equidistantly arranged in the material storage trough, each of the material storage assemblies comprises two material storage plates rotating in the opposite direction, each of the material storage plates is provided with a reset component for driving the material storage plate to reset to a horizontal state, the material pushing assembly is driven by the rotation of the active roller to push a sheet metal part at the bottom layer in the material storage trough toward the support platform, and the transmission assembly is driven by the rotation of the active roller to make the two material storage plates of each of the material storage assemblies in the material storage trough rotate in the opposite direction from bottom to top, so that the sheet metal parts on the two material storage plates of each of the material storage assemblies fall to the bottom.

The invention belongs to the technical field of papermaking, and particularly relates to a preparation method of a nylon wear-resistant papermaking dry net, which comprises the following specific steps: S1, mixing dried nylon chips with graphene powder according to a certain proportion, adding other auxiliaries (silane coupling agent and active agent SDBS) in parts by weight, 95-99.5 parts of polyester chips and 0.5-5 parts of talcum powder in the mixing process, and uniformly mixing to obtain a nylon wear-resistant papermaking dry net; 5-10 parts by weight of a silane coupling agent and 0-5 parts by weight of an active agent SDBS; s2, extruding through a screw extruder, molding through a cooling device, and carrying out stretching, heat setting and oiling treatment to prepare monofilaments; according to the step, a monofilament cooling structure is formed by arranging a cooling platform, a water cooling box, a water distribution pipe, a water inlet header pipe and a water drainage pipe, the function of keeping the temperature consistent when monofilaments are cooled is achieved, the problem that the water temperatures of all parts are inconsistent when the monofilaments are cooled is solved, and the material machining quality is improved; and the condition of inconsistent monofilament uniformity caused by inconsistent temperature during monofilament cooling is reduced.

The utility model relates to a turnover type transfer appliance device special for a threshold stiffening beam, and belongs to the technical field of transfer. The device provided by the utility model comprises three assembly bodies, namely a frame assembly (1), a pressing rod assembly (2) and a stand column seesaw assembly (3), the device is made of an aluminum alloy material, is light in weight, has a weight reduction effect of about 30%, is corrosion-resistant and long in service life, and can be recycled; the device mainly adopts a welding and screw joint mixed connection scheme, the whole frame adopts welding to reduce the problems of interference with bolts and the like in the structure overturning process, and a multi-layer division overturning movable grillwork structure is adopted to fix the number of transferred workpieces, so that accurate statistics and counting are facilitated; meanwhile, foam is adopted on each storage cavity for pressing the workpieces, so that the workpieces are prevented from falling off; a connecting rod linkage mechanism is designed, so that the use efficiency is improved.

The embodiment of the utility model provides a sliding and rolling display device which comprises a sliding and rolling device and a flexible display module, the sliding and rolling device is used for assisting the flexible display module in sliding rolling and unfolding, the flexible display module comprises a flexible display panel and a flexible circuit board, and the flexible display panel comprises a first end and a second end; the sliding and rolling device comprises a housing used for supporting a non-rolling and non-sliding part of the flexible display panel; the sliding rail is arranged on the side, away from the flexible display module, of the machine shell, and the machine shell is in sliding connection with the sliding rail; the first supporting structure is in sliding connection with the sliding rail, is connected with the side, away from the first end of the flexible display panel, of the machine shell and is used for supporting the rolling and sliding part of the flexible display panel; the second supporting structure is connected to the side, close to the second end of the flexible display panel, of the first supporting structure, is slidably connected to the sliding rail and is used for supporting and fixing the flexible circuit board, and the risk that the flexible circuit board scrapes a rear shell of the display device due to warping in the moving process of the sliding and rolling device can be reduced.

The utility model relates to the technical field of board placing jigs, and discloses a PCB placing jig corresponding to a divider, which comprises a box body, the box body comprises a bottom plate, a top plate and two side plates connected between the bottom plate and the top plate, and a plurality of slide rails are arranged between the two side plates; the fixing mechanism comprises a first fixing mechanism and a second fixing mechanism which are oppositely arranged, the first fixing mechanism is fixedly connected with one side plate, the second fixing mechanism penetrates through the sliding rail to be movably connected, the fixing mechanism comprises an end plate, a limiting mechanism and a plurality of rotating shafts, and the rotating shafts are arranged at intervals in the vertical direction and fixed to the end plate; each rotating shaft is provided with a plurality of supporting parts, the limiting mechanism comprises a plurality of limiting assemblies which are arranged at equal intervals with the rotating shafts, and the rotating shafts are limited to drive the supporting parts to rotate between the first position and the second position. The jig is matched with a mechanical arm to act, automatic layering is achieved, and the problems of scratching and static electricity generation caused by PCB stacking are effectively solved.

A multifunctional can opener comprises a handle, a driving mechanism and a cutting mechanism, the driving mechanism comprises a base, a driving wheel, a rotating shaft rod, a fixing piece, a rotary knob and a cover plate, the base is provided with a fixing piece hole site, a main chuck, a bottle opener and a crowbar, the fixing piece is arranged in the fixing piece hole site, and the two ends of the fixing piece protrude out of the surfaces of the upper side and the lower side of the base; a shaft hole is formed in the middle of the fixing part, a rotating shaft rod is arranged in the shaft hole, the bottom end, arranged in the shaft hole, of the rotating shaft rod is connected with a driving wheel, the top end of the rotating shaft rod is connected with a rotary knob, and after the rotating shaft rod is connected with the driving wheel and the rotary knob, the driving wheel can rotate by 360 degrees back and forth by operating the rotary knob. The cutting mechanism comprises a sliding plate, a cutting knife wheel and a guide wheel, the sliding plate is provided with an auxiliary chuck and a limiting hole, the sliding plate is movably connected with the base, the cutting knife wheel and the guide wheel are movably connected to the sliding plate, and the limiting hole is arranged at the bottom end of the fixing piece in a sleeving mode and makes contact with the bottom of the fixing piece.

The invention discloses a demolding device for a plastic product injection mold, and relates to the technical field of injection molds, the demolding device comprises a movable mold, a fixed mold, a mounting plate, a mold closing cylinder, a mounting rack, a mold core and a demolding unit; the mounting plate is fixed on the injection molding machine and is used for mounting and fixing other components; the mold closing cylinder is fixed on the mounting plate and is used for driving the moving mold to move and realizing opening and closing of the mold; the mounting frame is fixed at the end part of a piston rod of the mold closing cylinder, and guide rods are fixed at four corners of the mounting frame, penetrate through the mounting plate and are fixedly connected with the movable mold; the mold core is arranged in the cavity of the movable mold, and the middle of the mold core is of a conical structure and used for molding the shape of an injection product; the demolding unit is provided with shovel plates which are arranged in the circumferential direction, located on the outer side of the mold core and used for demolding injection-molded products; the technical effects that the pressure distribution is uniform, the risk of scratching or extruding the surface of a product is reduced, the demolding efficiency is improved, the stability is improved, and the production efficiency is improved can be achieved.

The invention discloses an auxiliary positioning tool for a headlamp of a rail transit vehicle and an installation method, solves the problem that the installation efficiency of the headlamp is low in the prior art, and has the beneficial effects that the headlamp does not need to be carried repeatedly, and the installation efficiency of the headlamp is improved. Comprising a main frame assembly, the main frame assembly is in a frame shape and has the same radian as a headlamp mounting base, a headlamp can be clamped in the hollow position of the main frame assembly, the shape of the main frame assembly is consistent with the shape of a headlamp shell, the outer side face of the main frame assembly is matched with the headlamp mounting base, and the main frame assembly is provided with a first opening. The fastener penetrates through the headlamp shell and is connected with the first opening; positioning assemblies are arranged on the two opposite sides, away from the outer side face of the headlamp mounting base, of the main frame assembly correspondingly, the positioning assemblies are higher than the headlamp mounting base, and the positioning assemblies are detachably connected with the main frame assembly.