48results about How to "Meet tolerance requirements" patented technology

The invention discloses an existing railway line mileage lofting method based on an aerial survey technique. The method comprises the following steps of extracting of discrete point coordinates, forward projecting of the coordinates, complete railway mid-line generating, line mileage valuating, backward projecting of the coordinates and mileage lofting. According to the existing railway line mileage lofting method, accumulation of manual measurement errors and occurrence of gross errors are weakened, labor input is reduced, the working efficiency is improved, and train operation accidents caused when railway signals are disturbed by a steel rule are avoided; traditional existing line on-line operation can be replaced, the error tolerance requirement of railway mileage measurement can be met, and the mileage lofting precision can meet the standard requirement of 1 / 2,000.

The invention provides an opening method of a CFRP (Carbon Fiber Reinforced Plastics) and a CFRP work-piece. The opening method of the CFRP comprises the steps of using a first drill bit with a diamond coating to drill, wherein the revolving speed of the first drill bit is 2,500-3,500 / min, the feed rate is 200-280mm / min, and the cutting depth is 5-9mm, when the drilling is carried out; using a second drill bit with a diamond coating to perform broaching, wherein the revolving speed of the second drill bit is 1,500-3,500r / min, the feed rate is 120-200mm / min, and the cutting depth is 2-6mm, when the broaching is carried out. According to the opening method of the CFRP provided by the invention, the drill bits with the diamond coatings are adopted to drill, so that the CFRP can be quickly and smoothly cut, and the excessive temperature of tools can be prevented; furthermore, a way of drilling and then broaching is adopted to open the hole, and the used drill bits are adjusted according to pore sizes, so that the opening speed is fast, the hole wall of the opened hole is smooth, and the opening quality is good.

The invention belongs to aerospace product machining technology equipment and particularly discloses a positioning support device for stir friction welding of a storage box cylinder section circular seam. A central shaft disk is arranged above a rotating base seat, a support ring is arranged in the center of the central shaft disk, a top ring is arranged above the central shaft disk, a connecting disk is arranged above the central support ring, long support rods are arranged outside the connecting disk, a short support rod is connected with the rear end of each long support rod, and internal threaded holes are arranged in two ends of left end and right end of a double-stud structure of an adjusting sleeve and respectively connected with the long support rods and the short support rods; the rotating base seat is a perpendicular long positioning rod and a pressing rod, and a pressing plate is arranged above the pressing rod; and a perpendicular short positioning rod is installed between the short support rods and the rotating base seat. Due to the cyclic structure which is formed by the long support rods and the short support rods is adopted, products on a cylinder section can be positioned and supported, positioning error is effectively reduced, and tolerance requirements of welding can be met, and at the same time, parameters in the welding process are stable, internal stress and deformation are small, and positioning support device is further favorable for preventing weldments from being pierced through by a stirring needle.

A six-axis linkage space shaking electric discharge machining method in the field of numerical control machining technology, by classifying the margin of the workpiece after preliminary machining, that is, the margin between the workpiece surface and the surface to be processed is divided into multi-level shaking surfaces and graded. Reduce the discharge standards between the levels, and then convert the pose data corresponding to the reference plane obtained from the equidistant planes at each level to obtain the NC machining code of the electrode movement, and smooth the surface of the workpiece to the design requirements by shaking the electrode. Dimensional accuracy and surface roughness. The invention uses CAD / CAM software to analyze shaking errors, plan shaking trajectories, generate corresponding shaking data, and realize shaking processing involving up to six axes at the same time.

The invention discloses a manufacture method of mutability material adhesive tape die cutting products. The method includes the steps: 1) primary back rolling: fitting a roll-shaped abrasive tape withroll-shaped release paper to form a first fitting coiled material, and enabling a take-up direction of the first fitting coiled material to be opposite to a pay-off direction of the roll-shaped abrasive tape; 2) primary standing: standing the first fitting coiled material for 12 hours or more; 3) secondary back rolling: peeling the release paper in the first fitting coiled material to perform pay-off, fitting the release paper with second release paper to perform pay-off to form a second fitting coiled material, and setting a pay-off direction of the second fitting coiled material opposite tothe take-up direction of the first fitting coiled material; 4) secondary standing: standing the second fitting coiled material for 12 hour or more; 5) fitting, die cutting and forming: peeling the release paper in the second fitting coiled material to perform pay-off, fitting the release paper with third release paper, and performing cutting to form the products. According to the method, telescopic deformation of the adhesive tape can be effectively controlled, and the die cutting accuracy of the products is improved, so that the yield of the products is improved.

The invention discloses a machining device of an insulating end ring. A round milling cutter is installed at the position of a drill bit of a radial drilling machine; a rotating workbench can be rotationally fixed to a workbench of the radial drilling machine; each clamping piece comprises a bottom plate, two vertical clamping plates fixed to the upper end face of the bottom plate, and a clamping bolt connected to the vertical clamping plates; the three or more clamping pieces are evenly and detachably fixed to the rotating workbench along the same circumference; three or more cushion blocks are connected to the bottom plates of the clamping pieces in a clamped manner; one end of the upper end face of the cushion block located at the position of a fracture of a phenolic aldehyde fiber container is high, the other end of the upper end face of the cushion block located at the position of the fracture of the phenolic aldehyde fiber container is low, and the height difference is the height difference of the two ends at the position of the fracture of the phenolic aldehyde fiber; and the heights of the rest of the cushion blocks are sequentially decreased from the position close to the high end of the cushion block at the position of the fracture to the lower end of the cushion block at the position of the fracture, and a curve formed after the upper end faces of the cushion blocks are smoothly connected is the same as end ports, different in height, of the machined insulating end ring in shape. The insulating end ring machined through the machining device is high in accuracy, easy to operate, capable of saving manpower, safe, high in work efficiency and high in universality.