7results about How to "Improve dimensional accuracy" patented technology

The utility model relates to a novel civil air defence door frame pre -buried sleeve pipe combined steel form, including front formwork subassembly, rear formwork subassembly and a plurality of pre -buried sleeve pipes, and front formwork subassembly and rear formwork subassembly all include a pair of left, right distribution's vertical formwork, and a block horizontal formwork is established between a pair of vertical formwork top, and the inside end between the vertical formwork of front, rear formwork subassembly component is located same side and is equipped with inside end closing plate, and the inside end face of vertical formwork and the outside end face of inside end closing plate are pasted together, and the horizontal formwork bottom between the horizontal formwork of front, rear formwork subassembly component is equipped with top closing plate, and top closing plate and inside end closing plate are perpendicular distribution, and the left and right two ends bottom surface of top closing plate respectively with the top surface of inside end closing plate located same side are pasted together. The utility model effectively improves the size accuracy of the civil air defence door frame wall after pouring concrete, makes the right angle of civil air defence door frame wall left, right inside end, the right angle of civil air defence door frame wall top left, right two ends all get good guarantee, avoids the normal installation of subsequent civil air defence door frame being affected.

This invention relates to a method for preparing capillary seamless steel tubes, comprising the following sequential steps: S100. Selecting austenitic stainless steel seamless tubes as tube blanks, the outer diameter of the tube blanks being 8mm-15mm, the wall thickness being 0.5mm-1.2mm, and the wall thickness accuracy being ±0.015mm; S200. Using a drawing machine with a long mandrel, cold-drawing the tube blanks from S100, when the deformation compression rate of a single cold drawing is 30%-75%, performing internal and external surface cleaning and solution treatment; repeating the above treatment until a capillary seamless steel tube with an outer diameter of 3.8mm-4.2mm and a wall thickness of 0.125mm-0.3mm is obtained. Drawing the billet; wherein the hardness of the long mandrel is 780HV-860HV, and the diameter accuracy of the long mandrel is ±0.005μm; S300. Using a drawing machine with a moving mandrel, the moving drawing billet obtained in S200 is cold drawn. When the deformation compression rate of a single cold drawing is 30%-75%, the inner and outer surfaces are cleaned and solution treated; repeat the above treatment to obtain a capillary seamless steel tube with an outer diameter of 0.59mm-1mm, a wall thickness of 0.05mm-0.09mm, and a wall thickness accuracy of ±0.003mm; S400. The capillary seamless steel tube obtained in S300 is subjected to external grinding treatment to obtain the final product.

This invention relates to the field of pipe-ending machine technology, specifically to a pipe-ending machine, comprising a worktable with an isolation frame on its surface. The worktable is hollow with an open bottom, and the isolation frame has a through groove at its top. A top frame is provided above the isolation frame, and a support frame is provided on the side of the worktable away from the isolation frame. A pulley table is provided on the surface of the support frame, and limiting components are provided on both sides of the pulley table. After the pipe-ending cutting operation is completed, the output end of the control rotating motor drives the lead screw to rotate in the opposite direction. When the lead screw rotates, it drives the moving seat to move away from the pipe. At this time, the pull rope wrapped around the surface of the collecting roller gradually loosens, and the traction force on the moving rod decreases, thereby causing the moving rod to drive the baffle to slowly move downward in the vertical direction. During the downward movement of the baffle, the waste material generated by pipe cutting is pushed by the pipe-ending blade to coil around the inner wall of the isolation frame, causing the waste material to fall below the isolation frame, thereby improving the efficiency of the pipe-ending cutting operation.

The invention discloses a full-automatic rapid carton sealing machine, and relates to the technical field of carton sealing machines, the full-automatic rapid carton sealing machine comprises a first conveying belt, a first mounting rack, a clamping plate, a carton pushing mechanism, a second conveying belt, a second mounting rack, an adjusting mechanism, a control end, a length detection mechanism and a carton body, the center of the outer wall of the first conveying belt is fixedly connected with the first mounting rack; clamping plates are slidably connected to the front end and the rear end of the top of the first conveying belt correspondingly, a box pushing mechanism is fixedly connected to the right side of the front end of the first conveying belt, an adjusting mechanism is arranged, three sets of adhesive tape are overlapped through workers, the overall strength and pressure resistance of box sealing are improved, and the risk of seal cracking in the transportation and carrying process is reduced; meanwhile, it is ensured that the thin or weak adhesive tape can provide the enough carton sealing effect, then the three sets of clamping detection mechanisms are arranged in an inclined mode through the electromagnetic clutches, and therefore adhesion of the multiple sets of adhesive tape is completed at a time, the adjusting frequency of the carton sealing machine is reduced, and carton sealing continuity and production efficiency are improved.

The utility model relates to the technical field of high-voltage bushings, and discloses an explosion-proof environment-friendly cabinet surface metal grounding bus connecting bushing, which comprises an epoxy resin insulating main body, a conducting rod is arranged in an inner cavity of the epoxy resin insulating main body in a penetrating manner, and two shielding nets are arranged in the inner cavity of the epoxy resin insulating main body close to the middle position. The two shielding nets are arranged up and down, an explosion-proof layer mounting surface is arranged on the periphery of the epoxy resin insulation main body close to the middle position, the shielding net structure is adopted, one shielding net is used for indicating the electrification state of the switch, when a high-voltage conductor is electrified, the induction capacitor generates a low-voltage electric signal, and the prompting and warning effects are achieved by connecting a high-voltage electrification display; the switch equipment does not need to be specially configured with a high-voltage sensor; and secondly, an extremely non-uniform electric field is changed into a slightly non-uniform electric field through the shielding net, the electric field intensity of the part is reduced, and the sleeve can safely penetrate through the metal plate due to the shielding effect.

The invention provides a manufacturing method of a mask plate and the mask plate. The manufacturing method comprises the following steps: providing a stacking structure; taking the hard mask layer as a mask, removing a part of the shading material layer to transfer a pattern of the hard mask layer to the shading material layer to obtain a first intermediate, and forming a groove in the shading material layer by the pattern; removing the hard mask layer in a first target removal duration, and extending the depth of the groove to remove a part of the phase shift material layer to obtain a second intermediate; measuring the critical dimension of the shading material layer in the second intermediate; according to the key size, the target size and a preset configuration relation, determining a second target removal duration, the preset configuration relation being used for representing a corresponding relation between the removal duration and a size difference value, and the size difference value being a difference between the key size of the shading material layer and the target size of the phase shift material layer; and continuously removing a part of the phase shift material layer of the second intermediate with a second target removal duration to obtain the mask plate. Therefore, the size accuracy of the mask plate can be effectively improved.

The utility model discloses an ultrasonic reflection type measuring pipeline which comprises a water meter pipe section, a second-stage reflector plate component device and two ultrasonic transducer assemblies are installed on the water meter pipe section, and a first-stage reflector plate component device and a third-stage reflector plate component device are installed in the water meter pipe section. And the second-stage reflector plate component device is fixed through the second-stage reflector plate fixing device. The ultrasonic water meter reflector plate structure device has the advantages that the ultrasonic water meter reflector plate structure device is of a split type and is installed on a water inlet and a water outlet of a water meter pipe section and the inner wall of a middle reducing pipe, meanwhile, the reducing pipe in the middle of a water meter pipe section body forms an ultrasonic measuring pipeline of the whole water meter, and the whole ultrasonic wave propagation path is in a W shape; the problems that the water flow field is unstable, the pressure loss of the water meter is large, and ultrasonic measurement is inaccurate due to the fact that the periphery of the reflector plate is easily wound by foreign matter are solved.