32results about How to "High flatness precision" patented technology

An optical element includes a light guide plate that has therein a light transmissive flat plate member on which a transflective layer is formed, and a layer of a light transmissive adhesive or a light transmissive resin layer that uniformly covers the light guide plate. The refractive index of the layer of the adhesive or the resin layer is set to a refractive index different from that of the light guide plate. A first surface of the layer of the adhesive or the resin layer that is on the light exit surface side of the light guide plate is kept parallel with a second surface of the layer of the adhesive or the resin layer that is on the opposite side to the light exit surface side of the light guide plate.

The invention relates to a vacuum suction table of a double-layer structure. The vacuum suction table comprises a frame, a bottom plate, a panel and honeycomb cores; the bottom plate is provided with bottom plate suction openings and the panel is covered with small adsorption holes; the vacuum suction table is characterized in that the inner region of the frame includes air duct regions and installation regions, the air duct regions and the installation regions are independent mutually, the air duct regions are internally provided with air duct suction openings which are communicated with the bottom plate suction openings in a one-to-one correspondence mode, the installation regions correspond to the honeycomb cores one to one, and the frame is filled with corrugated cores located above the honeycomb cores, each corrugated core includes an upper end face, a lower end face and supporting connection faces, each upper end face is combined with the supporting connection faces located at the two sides of the upper end face to form an aeration area which is communicated with the corresponding air duct region, the upper end faces are connected with the panel and provided with small air holes A which are communicated with the small adsorption holes in a one-to-one correspondence mode, a part of lower end faces are in connection with the corresponding honeycomb cores in a covering mode, and the other part of the lower end faces are connected with the corresponding air duct regions. The vacuum suction table is high in strength, internal gas paths are small in windage resistance, energy loss is low, and adsorption force is large and uniform.

The invention discloses a method for milling a precise cavity plane of a thin-wall aluminum-magnesium cartridge receiver of an aircraft engine. The method comprises the following steps: (a) selecting a diamond material and a milling blade with a smoothening edge, so that the plane cutting speed is increased, and the cutting efficiency is improved; (b) polishing the smoothening edge of the milling blade to form an angle alpha with a machined surface on the machined thin-wall aluminum-magnesium cartridge receiver; (c) optimizing milling machining parameters according to the milling blade and the smoothening edge of the milling blade; (d) fixing the machined thin-wall aluminum-magnesium cartridge receiver in a point supporting manner; and (e) carrying out surface milling machining on the precise cavity plane of the fixed machined thin-wall aluminum-magnesium cartridge receiver by virtue of the optimized milling machining parameters, so as to obtain the formed precise cavity plane of the thin-wall aluminum-magnesium cartridge receiver. According to the method, the plane cutting speed can be increased, the cutting efficiency can be improved, meanwhile, the cutting force can be decreased, and the friction between a cutter and machined parts is reduced, so that the vibration, cutter relieving and deformation of the plane in the machining cutting can be reduced, and finally the precision requirement of a big plane is guaranteed.

The invention discloses a foldable small-hole large-face machine plus anti-scraping tool, which includes an end cover, a knife seat, a joint and a knife bar; the knife bar is connected to the main shaft on the machine tool, and the joint is installed on the knife bar. The lower end of the knife seat is movably mounted on the joint, and the upper end of the knife seat is movably mounted on the end cover, and a forming blade is installed on the knife seat, and the knife seat can rotate between the end cover and the joint; when the end cover, the knife When the seat and the joint are connected together in turn, the rotation of the main shaft on the machine tool drives the corresponding rotation of the knife rod, so that the automatic folding and unfolding of the forming blade between the end cover and the joint is realized. The foldable small-hole large-face machine plus anti-scraping tool of the present invention realizes the automatic folding and unfolding function of the tool holder by using the machine tool spindle, cancels the manual loading and unloading process, simplifies the machining process of small-hole large-face structure, releases labor force, and improves Machine efficiency.

The present application relates to a road surface detection method, device, computer equipment and storage medium. The method includes: acquiring a ground point cloud of the road surface to be detected; constructing a grid map according to the ground point cloud, determining the two-dimensional ground points covered by each grid in the grid map; acquiring the ground point cloud of each grid The height value of the two-dimensional ground points covered by each grid, and the flatness of the road surface to be detected is determined according to the height value of the two-dimensional ground points covered by each grid. By adopting the method, road surface detection with higher precision can be realized.

The invention discloses an ultra-long guide rail for a three-coordinate measuring machine. The ultra-long guide rail comprises branch guide rails and front and rear bases for the branch guide rails, wherein four bolt holes for arranging full-thread screws are formed in a lower bottom plate of each of the front and rear bases, and threaded holes are formed in vertical plates and upper bottom plates of the front and rear bases; an elastic adjusting bolt is arranged in one threaded hole of each vertical plate, and rigid adjusting bolts are arranged in the other threaded holes of each vertical plate; a square hole is formed in each of the two ends of each of main and auxiliary lateral surfaces of each branch guide rail, and a pair of stepped holes communicated with the corresponding square holes is formed in each of the front and rear end faces of each branch guide rail; springs are arranged in the stepped holes of the spliced end faces; the full-thread screws penetrate through the springs in the stepped holes; the two ends of the full-thread screws are positioned in the corresponding square holes respectively, and are locked by nuts. The ultra-long guide rail is high in planeness accuracy, straightness and splicing seam bonding accuracy, strong in splicing seam bonding strength, small in bonding seam thickness, simple in structure, easy to assemble, free of maintenance and low in cost, influence on accuracy when air bearings pass through bonding seams is avoided, and the accuracy, comprising the planeness and the straightness, of the guide rail is kept unchanged when temperature is changed.

The invention relates to a two-step forming method for pre-pressing and maintaining a thin plate glass, which belongs to the field of liquid crystal display panel glass substrate and panel forming. It installs a pair of pre-pressing rollers with narrow slits parallel to the cross-sectional direction of the molten glass ribbon under the outlet of the high-temperature molten glass, and pre-presses the molten glass ribbon left by the outlet of the molten glass with narrow slits. Under it are installed two crawlers composed of flat track shoes that run relatively synchronously, and the pre-pressed glass liquid belt is introduced into it, and after extrusion, shaping and gradually cooling and annealing, it becomes the extrusion gap of the flat track shoes on the same track. Thick sheet glass. As shown in Figure 1. Because of the forced pressing of mechanical molds, the thickness and flatness precision of thin plate glass can be guaranteed. The surface of the glass sheet is controlled by the surface quality of the extruded flat die, so mirror precision can be achieved. This molding method is a molding technology for flat display substrates and touch panel glass of mobile phones, car GPS, PDA, learning machines, notebook computers and other products.

The invention belongs to the technical field of construction machines and devices for CFG (cement fly-ash gravel) piles in a roadbed and roadbed reinforcement projects and particularly relates to a pile head cutting machine for CFG piles, and the machine provided by the invention is used for solving the problems that the existing cutting machine is incomplete in performances and can not meet the pile head cutting requirement of the CFG piles. The pile head cutting machine for the CFG piles comprises a control system, the control system further comprises a vertical fine adjustment control system for a cutting saw, the vertical fine adjustment control system comprises a vertical transmission lead screw, the vertical transmission lead screw, an upper screw nut which is fixed opposite to a vertical support frame and a lower screw nut which can slide relative to the vertical support frame and be fixed relative to the vertical support frame are matched and connected, and the lower screw nut is connected with an electric motor through a connecting part. By adopting the pile head cutting machine for the CFG piles, the three-dimensional cutting control in the circumferential direction, radial direction and vertical direction can be realized during the cutting process, the stable performances of the device during the cutting process can be ensured, the work efficiency of standardized operation is improved, the operation space is reduced, and the air dust pollution is reduced during the construction.

The invention belongs to a multi-functional aluminum and aluminum alloy plate full-width hydraulic leveling machine. The machine comprises a drive motor, a speed changer (2), a hydraulic station (14) and an operation table (11), wherein the drive motor and the speed changer (2) are connected with gantry wheels (15); the gantry wheels (15) are arranged at the lower end of a traveler gantry (4) and is in movable contact with a working table (1); the upper plane of the working table (1) is provided with a plurality of groups of movable anvil block components (5); the right end of each movable anvil block component (5) is provided with a movable anvil block drive device (13); the upper plane of the working table (1) is also provided with a plurality of hydraulic supporting plate oil cylinders (3); a hydraulic station (8) is arranged in the middle of an upper cross beam of the traveler gantry (4); pressing head movable motor driving mechanisms (7) are arranged on the two sides of the hydraulic station (8); pressing heads (6) are arranged on the lower sides of the pressing head movable motor driving mechanisms (7); a displacement sensor (9) is arranged on the right side of the pressing heads (6). The machine has the advantages of compact structure, low investment, high flatness accuracy and more functions.

By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced. The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus 5 after a master carrier 3, 4 bearing transfer information and a slave medium 2 to be transferred are brought into confronted close contact and received within a holder 10, wherein said holder 10 has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3 / 12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2 when the width of close contact area between the slave medium and master carrier is defined as 1 m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.