37results about How to "Guaranteed roughness requirements" patented technology

The invention provides a non-spherical surface element shaping and processing method by using a numerical control tangent revolution method and a device thereof, and relates to an optical element processing technique. The processing method and the device can always conduct the tangent point processing for the meridional profile curve of any designed and given axisymmetrical non-spherical surface (including higher order and quadric spherical surface) and spherical surface element, so as to obtain a theoretical continuous smooth high precision surface without corrugation. The tangent point processing of the non-spherical surface is realized through the rotation of a workpiece and an abrasive wheel, and the numerical control linkage of an oscillating shaft, a workpiece shat and an abrasive axle. The tangent point processing of the spherical surface is realized through the rotation of the workpiece and the abrasive wheel, the oscillation of the oscillating shaft and the fixation of the abrasive axle at a certain distance. The processing technique has the advantages of good commonality, high precision and processing efficiency, easily ensured surface roughness and surface texture, low processing cost and the like.

The present invention discloses surface quenched chrome plated wound and welded roller making process, which includes the steps of hot winding, bottoming welding and processing bevel, coarse turning, surface quenching, semi-finish turning, assembling welding, finish machining and post-treatment. The process of the present invention is suitable for making roller of 500-1200 mm diameter, 25 mm wall thickness and 2050-2200 mm length, and roller surface is treated through quenching, sand blasting to roughen and chrome plating. The present invention has the advantages of saving in material, low making cost and short production period.

The invention discloses a chute machining method for the inner wall face of a case of an aero-engine. The method comprises the following steps that a, a five-axis numerical control machine tool is selected as machining equipment; b, the tool assembly manner is improved, a through-connection angle head is used for carrying out through connection on a tool on a machine tool spindle, and the machine tool spindle stretching into the case in the axial direction of the case and the tool for machining the inner wall face of the case in the radial direction of the case are formed; c, the tool is selected, the diameter of a handle of the tool ranges from phi6 to phi10, the diameter of a cutting part ranges from phi4 to phi7, the length-diameter ratio of the tool ranges from 1:7 to 1:10, and therefore tool vibration brought by through connection of the tool in the machining process is reduced; d, a chute machining process path is selected, and a circulation machining manner is adopted so as to guarantee the surface roughness of chutes and improve the machining efficiency; and e, all chute design positions on the inner wall face of the case are machined, and the formed case is obtained. The requirements for the sizes and the roughness of the chutes are guaranteed; and tool consumption is greatly reduced, and the machining cost is reduced.

The invention provides a steel rolling motor shaft shoulder end face movable turning device. The steel rolling motor shaft shoulder end face movable turning device comprises a transverse feeding device and a longitudinal feeding device; the straight line between the point of a turning tool and the center of a motor shaft is regulated to parallel to the axis line of a lead screw II, so that a motor rotates, steel rolling motor shaft shoulder end face turning can be realized on working site, time, labor and cost are saved, and the flatness and the roughness of the technical requirements can be ensured; and because the steel rolling motor shaft shoulder end face movable turning device is movably arranged on the plane of a bearing seat and a bottom plate is fixed by using screw holes in the plane of the bearing seat, the device is convenient for disassembly and assembly.

The invention discloses a lifter bore drilling cutter assembly and a lifter bore machining method. The cutter assembly comprises an internal-cooled pilot step drill bit and a heavy-metal hot shrink-fit shank. The internal-cooled pilot step drill bit is of a step structure with internal cooling holes and specifically comprises a core bit, an expanding section, a chamfering section and a drill bit shank, wherein the diameter of the core bit is the smallest to enable the core bit to avoid cross main oil passage holes when the core bit drills the bottom hole of the lifter bore; the internal cooling holes are formed in the end part of the core bit; the expanding section is close to the core bit; the chamfering section is connected with the expanding section; and the internal-cooled pilot step drill bit is installed on the heavy-metal hot shrink-fit shank through the drill bit shank. By machining the bottom hole of the lifter bore through the heavy-metal hot shrink-fit shank in cooperation with internal-cooled pilot step drill bit, the problems that the cutter is unevenly stressed and the elliptical aperture is apt to occur during the machining of offset cross lifter bores are well solved. In addition, by using a diamond honing reamer to hone and ream the lifter hole, the requirement on the roughness of the lifter hole is satisfied and the durability of the cutter is improved.

The invention relates to an inlay type combined die structure comprising a die sleeve, wherein a back pad is arranged in the die sleeve; a die body is arrange on the back pad in the die sleeve; a forming groove is arranged on the die body; an inlaid piece slot is arranged in the forming groove; an inlaid piece is arranged in the inlaid piece slot; the upper forming surface of the forming groove is shaped like an arc; the inlaid piece is of a + shape or a linear shape or a +- shape; the inlaid piece slot is a through hole on the die body; the die body is made from a material with good toughness; and the inlaid piece is made from an abrasion-proof material. By adopting the structure, the inlay type is adopted to replace an integral type, so that stress concentration is avoided and the phenomenon that root is easy to break off does not happen; the mold is processed by adopting wire cutting, so that the processing is easy, the polishing can be carried out, the roughness requirement of the mold can be guaranteed, the service life of the mold is prolonged and the factory cost of products is reduced.

The invention relates to an investment casting method of a knotter rack. The investment casting method is characterized by comprising the steps of 1) establishing a three-dimensional model of the knotter rack through three-dimensional software; 2) carrying out data processing on the three-dimensional model through hierarchical processing software; 3) sending model manufacturing data obtained after data processing into a rapid forming machine for rapid formation of a rack model; 4) carrying out investment casting through adopting the rack model as a wax model, so as to obtain a metal casting of the knotter rack; and 5) carrying out machining treatment on the metal casting. According to the investment casting method, a rapid forming technology and an investment casting technology are combined, so that the metal casting of the knotter rack can be obtained in a short time, and the manufacturing cycle is shortened; the rack model is manufactured through adopting the rapid forming technology, so that the manufactured rack model is high in accuracy, the used time is short, the wax model is not required to be developed, and the cost is reduced; and besides, the metal casting of the knotter rack is manufactured through adopting investment casting, so that the knotter rack with complex axial spatial position can be manufactured.

The invention discloses a special automatic extruding machine for a belt pulley inner hole. In order to solve the problems of cumbersome operation and low efficiency of an existing inner hole extruding device, according to the special automatic extruding machine for the belt pulley inner hole provided by the invention, a pressure generating device (4) is connected with a working table (7) throughthree stand columns (3) fixed onto a rack (21); a steel ball conveying device (2) is arranged on the working table (7); an outlet of a steel ball circulating pipeline (13) on the steel ball conveyingdevice (2) is arranged on one side of a feeding direction of an ejector rod (17) of the pressure generating device (4) and faces the working table (7); an inlet of the steel ball circulating pipeline(13) is connected with the working table (7); a workpiece clamping device (14) is arranged in the middle position on the working table (7); workpiece guiding plates (15) are arranged on two sides of ahorizontal direction of the upper surface of the working table (7); the workpiece clamping device (14) is arranged between the working table (7) and the workpiece guiding plates (15); a control console (9) is arranged in front of the working table (7); a feeding conveyor belt (1) and a discharging conveyor belt (6) are arranged on two ends of the working table (7).

The invention relates to a machining process for a thin-wall annular part of IC equipment. Step I, the inner diameter and outer circle of a part are roughly machined through a machine tool. The 2 mm allowance is reserved for the inner diameter and the outer diameter. The length of five parts can be machined through one material, and the end face is roughly machined. Step II, heat treatment is performed. Step III, the end face, the outer circle and the inner hole are subjected to finish machining. A workpiece is cut off through a cut-off tool. Step IV, hot melt glue is adopted for fixation. Theouter circle R angle is subjected to finish machining in place. According t to the machining process, during rough machining, the allowance is reserved, and the reasonable allowance is reserved for finish machining. The roughness requirement is guaranteed in the machining process, and the influence of polishing on the part size is avoided. The part is fixed with the hot melt glue through a vertical lathe, and the R angle is subjected to finish machining.

The invention discloses a vertical disc milling cutter device. The vertical disc milling cutter device comprises a cutter handle and a cutter disc, wherein one end of the cutter disc is detachably andfixedly connected with one end of the cutter handle, at least five blade grooves are circumferentially formed in the periphery of the other end of the cutter disc at intervals, a finishing blade is fixedly connected with the interior of at least one blade groove through an adjusting bolt, and rough blades are fixedly connected with the interiors of at least four blade grooves through fixing bolts. According to the vertical disc milling cutter device, the machining effect of a combined surface of a cylinder body and a top cover is improved.

The invention discloses an auxiliary mechanism of return discs of an axial plunger pump, and relates to the technical field of axial plunger pumps. The auxiliary mechanism comprises a wear-resistant disc, a plurality of wear-resistant protective plates and a plurality of connecting assemblies, wherein the wear-resistant disc comprises an annular plate and a plurality of lug-shaped protruding plates arranged in the circumferential direction of the outer edge of the annular plate, and one wear-resistant protective plate is arranged below each lug-shaped protruding plate; one connecting assemblyis used for connecting one wear-resistant protective plate and one lug-shaped protruding plate, and the connecting assemblies are used for fixing the wear-resistant protective plates and the wear-resistant disc to an end cover; each wear-resistant protective plate comprises an arc-shaped main body plate and an arc-shaped supporting plate arranged on the lower portion of the inner side of the arc-shaped main body plate; the return discs are placed between the wear-resistant disc and the wear-resistant protective plates, and the arc-shaped supporting plates are used for supporting the return discs; and the inner side faces of the arc-shaped main body plates are used for positioning the return discs. According to the auxiliary mechanism of the return discs of the axial plunger pump, an oil film gap of a sliding shoe pair can be guaranteed, the reliable return of a plunger can be guaranteed, and the later maintenance cost can be saved.

The invention relates to a base station anti-interference band-pass filter in a low-intermodulation and high-power DCS frequency band. The base station anti-interference band-pass filter comprises a filter body A, a filter body B, and a pair of connectors. The filter body A comprises a filter housing and a filter cover plate integrally casted therewith. Resonant cavities are disposed on the filterhousing. Connector mounting holes are disposed at both ends of the filter housing. The filter body B is connected to the lower end of the filter body A. The filter body B includes a filter bottom plate. Resonant columns are integrally casted on the filter bottom plate and are in one-to-one correspondence with the resonant cavities. The pair of connectors is installed at the connector mounting holes. According to the base station anti-interference band-pass filter, in order to increase the contact surface of the product, the cover plate and the cavities are directly casted into one body, the bottom plate and the resonant columns are directly casted into one body. The casting can ensure the roughness requirement of the product and reduce micro-discharge between the cover plate and the cavities so as to ensure the performance indexes of the product.

The invention belongs to the field of machining, and particularly relates to equipment applied to vertical machining center grinding machining for machining a special-shaped part and outer circles ofany radian. The equipment is composed of a hexagon socket cap screw, locating pins, a small pressing plate, a large pressing plate and a grinding wheel; the equipment is characterized in that a workpiece is positioned and fixed on a bottom plate through the locating pins, the small pressing plate and the large pressing plate; the workpiece is connected with a numerical control rotary table throughthe bottom plate, and the outer circle axis of the workpiece is ensured to coincide with the rotation center of a rotating table; in the machining process, the rotating table drives the workpiece todo reciprocating rotation motion, and the rotation radian is equal to the radian of the machined outer circle; and meanwhile, a machine tool spindle drives the grinding wheel to rotate at a high speedto serve as main cutting motion, and grinding machining of the outer circle of the incomplete radian is achieved through the combined motion of the main cutting motion and the reciprocating rotationmotion of the numerical control rotary table; and in conclusion, the equipment is convenient, stable and reliable to use and high in working efficiency, the labor intensity of workers is reduced, andthe machining quality is greatly improved.