3results 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.