15results about How to "Guaranteed geometric tolerance" patented technology

The invention provides a machining method for a three-petal type stator machining assembly with two-stage blades of an aero-engine. The machining method can solve the problems that the two-stage blades in a three-petal type stator are difficult to machine, parts are large in deformation after spraying and combined machining, and the shape and position sizes such as the blade profile tolerance, the flow channel profile tolerance and the concentricity of assembly parts at the front end and the rear end of the stator are out of tolerance. The method comprises the following steps of blank inspection, rough turning of an inner shape and an outer shape, rough milling of an outer shape, milling, finish milling, clamp trimming, finish trimming, finish turning, finish milling, finish turning, inspection, spraying, turning of a large-end coating, turning of a small-end coating, grinding of a blade tip, clamp trimming of a mark, fluorescent penetrant inspection and final inspection. The method is characterized in that: The working procedures between the outer shape rough milling step and the inspection step specifically comprise segmentation, stress relief heat treatment, joint surface and hole milling, grinding, combination, benchmark trimming, two end and inner shape fine turning, outer shape finish milling, splitting, blade shape finish milling, clamp trimming, combination, large end benchmark fine trimming, small end finish turning, small end lace and hole finish milling and large end finish turning. .

The invention discloses a machining tool and method for a positioning hole in the end face of a thin-wall part, and belongs to the field of machining. The machining tool comprises a machining table and a positioning assembly. The machining table is provided with a plurality of sliding grooves. The positioning assembly comprises a positioning seat, a plurality of bottom pressing modules and a plurality of top pressing modules, the positioning seat is placed on the machining table, an outer flange is arranged at the bottom of the positioning seat, each bottom pressing module comprises a first sliding block, a first supporting column and a first pressing plate, the first sliding blocks are slidably inserted into the sliding grooves, the first supporting columns are placed on the machining table, and the first pressing plates are arranged on the first supporting columns. Each top pressing module comprises a second sliding block, a second supporting column, a second pressing plate and a connecting rod, the second sliding blocks are slidably inserted into the sliding grooves, and the second supporting columns are placed on the machining table. According to the machining tool for the positioning hole in the end face of the thin-wall part, the thin-wall part is not prone to deformation in the actual machining process, and the dimensional tolerance and the form and location tolerance of the thin-wall part are guaranteed.

The invention relates to a tool for turning a high-speed motor stator spigot and a machining method of the tool, and relates to the technical field of high-speed motor stator machining.The tool comprises a stator mandrel, a tensioning part is integrally formed on the outer wall of the stator mandrel, a stator tensioning sleeve is arranged on the outer wall of the tensioning part in a sleeving mode, and the stator tensioning sleeve comprises a connecting ring and a plurality of tensioning strips; the plurality of tensioning strips are fixedly connected with the connecting ring at one end of the connecting ring, the plurality of tensioning strips are uniformly distributed in the circumferential direction of the connecting ring, the outer walls of the tensioning strips abut against the inner wall of the stator core, the inner walls of the tensioning strips abut against the outer wall of the tensioning part, the outer diameter of the tensioning part is gradually reduced in the axial direction of the tensioning part, and the wall thickness of the tensioning strips is gradually increased in the reducing direction of the outer diameter of the tensioning part. The motor base has the effects of ensuring the coaxiality of the spigots at the two ends of the motor base and the stator core and reducing the production cost.

The utility model discloses a steering shaft inner supporting tool and a steering shaft clamping machining method, and belongs to the technical field of tool clamps. The steering shaft inner supporting tool comprises a flange plate, a clamping core rod, a double-end connecting thread sleeve and a conical pull rod which are coaxially arranged, the double-end connecting thread sleeve is axially and movably arranged in a center hole of the flange plate, and the front end of the clamping core rod extends into the center hole of the flange plate to be in threaded connection with the flange plate. The front end of the conical pull rod penetrates through an inner hole of the clamping core rod and is in threaded connection with the double-end connecting thread sleeve; the outer conical surface of the rear end of the conical pull rod abuts against the inner conical surface of the conical hole in the rear end of the clamping core rod. The outer cylindrical surface of the rear end of the clamping core rod is used for sleeving a steering shaft, and at least one tensioning groove is radially formed in the outer cylindrical surface in a penetrating mode. When the inner supporting tool is used for clamping the steering shaft, the contact area of the steering shaft and the tool is large, clamping is stable, the steering shaft is completely exposed out of the tool, one-time forming of the outer surface of the steering shaft and a shaft hole is facilitated, and therefore the form and location tolerance of machined parts is improved.

The invention relates to the technical field of semiconductor processing, and particularly discloses a sand blasting method for protecting a disc body product, which comprises the following steps: processing a to-be-blasted surface of a to-be-blasted part to a size required by a drawing, then processing a non-blasted surface opposite to the to-be-blasted surface, and reserving a certain processing allowance, then, according to the roughness requirement of the drawing, the to-be-sandblasted surface is subjected to sandblasting treatment, the to-be-sandblasted part obtained after sandblasting is completed is machined again, it is guaranteed that the flatness of the to-be-sandblasted part meets the drawing requirement, the to-be-sandblasted surface obtained after machining again is protected, and the non-sandblasted surface is machined to the size needed by the drawing; and finally, the two to-be-sandblasted side faces of the to-be-sandblasted part are sandblasted, and the sandblasted to-be-sandblasted faces are repaired. The device can adapt to the situation that the to-be-sandblasted surface deforms after sandblasting treatment, so that the flatness of the to-be-sandblasted part meets the drawing requirement, the form and location tolerance of the finished product state of the protective disc body product is effectively ensured, and the use requirement of a user is met.

This invention relates to the field of positioning technology for thin-walled workpieces, and discloses a positioning device for preventing offset of thin-walled workpieces based on CNC machine tools. It aims to solve the technical problems of easy deformation during positioning of thin-walled workpieces and poor adaptability of traditional clamping blocks. The device includes a CNC machine tool body, a rotating chuck, an adjustment drive assembly, a push rod assembly, and a tensioning positioning assembly. A frustum-shaped push block converts rotational motion into linear motion via a screw and nut mechanism. This, in conjunction with a limiting assembly, drives the push rod assembly to synchronously and uniformly extend and retract radially, causing a spring steel sheet with a pre-positioned section to achieve curvature self-adaptation. The pre-positioned section is a sliding compensation arc surface section, adapting to thin-walled pipes of different diameters while maintaining surface contact. The device has two sets of staggered tensioning positioning rings, forming a full-circumferential, gapless support for the inner wall of the pipe. This device avoids stress concentration problems caused by line contact, effectively preventing deformation of thin-walled pipes, balancing positioning firmness and deformation prevention requirements, and significantly improving the processing qualification rate and production efficiency of thin-walled pipes.

The utility model discloses a high-precision clamp for a CNC machine tool. The high-precision clamp comprises a base, an upper clamping mechanism, a lower clamping mechanism, a supporting mechanism and a positioning mechanism, wherein the upper clamping mechanism and the lower clamping mechanism are used for clamping sheet metal accessories; the supporting mechanism is used for supporting the sheet metal accessories; the multiple upper clamping mechanisms and the multiple lower clamping mechanisms are arranged, the upper clamping mechanisms and the lower clamping mechanisms interact with each other and clamp the outer edges of the metal plate accessories, and the multiple supporting mechanisms are located at the bottoms of the metal plate accessories. The multiple positioning mechanisms abut against the side face of the outer edge of the metal plate accessory. The upper clamping mechanism and the lower clamping mechanism are matched to clamp the outer edge of a metal plate accessory, the supporting mechanism supports the bottom, the positioning mechanism limits the installation position, multi-directional constraint is formed, and accurate positioning and firm clamping of the metal plate accessory are achieved through the synergistic effect of all the mechanisms. And the dimensional precision, form and location tolerance and the like of the machined surface meet the requirements.

The utility model relates to worm wheel machining equipment technical field, concretely relates to a worm wheel machining lathe, including the body and power structure, the body one end longitudinal rotation is provided with the rotating shaft, and the rotating shaft is fixedly provided with the workstation on the top of body, the rotating shaft upper end is provided with the worm wheel stop piece, and the lower end is connected with power structure, the body top and both sides all are provided with displacement transmission structure, and displacement transmission structure transmission is connected with the mounting seat, two opposite the mounting seat are provided with the external circle milling assembly and ring groove milling assembly respectively, and the other mounting seat is provided with the end face milling assembly and longitudinally rotates, the external circle milling assembly, ring groove milling assembly and end face milling assembly all are connected with power structure. The utility model only needs to clamp worm wheel workpiece once to complete the multiple milling process, eliminates the error due to multiple clamping, improves the precision of worm wheel machining.

This utility model discloses a lathe with interpolation function, comprising a frame, a first platform, a second platform, a first spindle assembly, and a second spindle assembly. The second spindle assembly is equipped with a first moving mechanism. Both the first and second spindle assemblies are equipped with chucks. The second platform has two second moving mechanisms, each of which is equipped with a third moving mechanism. Each of the third moving mechanisms is equipped with an interpolation mechanism, and each interpolation mechanism is equipped with a tool magazine mechanism. This utility model utilizes dual-spindle machining with the first and second spindle assemblies. The first moving mechanism enables the reciprocating movement of the second spindle, and the independently controllable second and third moving mechanisms allow for simultaneous parallel machining of two workpieces, full machining of the same workpiece, or collaborative machining of the same workpiece, improving production efficiency. The interpolation mechanism is used for error compensation, improving machining accuracy and quality.

The machining technology for machining the multiple high-precision sliding block type parts comprises the following steps that S1, a material is roughly milled, and a square block material is obtained; s2, according to machining requirements, defining an end face with more machining elements as a large end face and an end face with less machining elements as a small end face, and firstly machining the large end face; s3, the materials are turned over and placed on a first clamp, and small end face machining is conducted; and S4, the materials are placed on a second clamp to be subjected to fine treatment. By means of the clamp, the same tool machining track can be combined, the tool changing frequency and the idle stroke distance are reduced, the machining time of a single product is shortened, the production efficiency is improved, the clamp is simple in structure and convenient to operate, multiple products can be machined through one-time clamping, the part size precision and the form and location tolerance can be better guaranteed, and the labor intensity of workers is relieved. Consistency of part position precision is improved, cutter abrasion is relieved, and cutter consumption is reduced. The problems that existing sliding block type parts are low in machining efficiency, not high in positioning accuracy and complex in operation are solved.

The invention discloses a manufacturing method of an asymmetric thin-wall high-precision bearing ring with a high-chromium-molybdenum steel structure, and relates to the technical field of bearing machining. The problems that after an existing thin-wall bearing outer ring of an asymmetric structure is turned, the form and location tolerance of a positioning groove and a locking boss of the end face exceeds the design requirement, the production qualification rate is too low, and cost is increased are solved. The machining method comprises the steps that turning is conducted, specifically, the appearance of the bearing outer ring is turned, and 0.2 mm machining allowance is reserved on each surface; grinding, wherein the machining allowance of all the surfaces of the workpiece is removed through grinding; hard turning: performing hard turning on the workpiece by using a numerical control lathe; hard milling of a plane C: a boss of the workpiece and the plane C are subjected to hard milling in a machining center, and 0.1-0.2 mm machining allowance is reserved during hard milling of the plane C; final grinding of the plane C: removing the machining allowance of the plane C of the workpiece through grinding; and hard milling of the plane A groove: the plane A groove of the workpiece is hard milled in the machining center. The method is used for machining the thin-wall bearing outer ring of the asymmetric structure.

The present invention discloses a multi-segment cabin forming method and device, wherein the method comprises: S101, installing a boss on the outer side of a spherical head to obtain a spherical bulkhead; S102, numbering all segmented cabins in sequence, and respectively welding spherical bulkheads at both ends of odd-numbered segmented cabins to obtain odd-numbered welded segmented cabins; S103, respectively performing external water pressure tests on all odd-numbered welded segmented cabins, and when all odd-numbered welded segmented cabins meet the external water pressure test, entering S104; S104, welding even-numbered segmented cabins between all odd-numbered welded segmented cabins in the order of numbers to obtain a combined cabin; S105, performing an external water pressure test on the combined cabin, and when the combined cabin meets the external water pressure test, a target sealed cabin is obtained. The method improves the precision of segmented shell docking and effectively controls the problems of large welding volume and shell welding deformation caused by internal fillet welding.

A large-size pyramid machining technology comprises the steps that firstly, a pyramid is formed through forging according to the figure 2, and the machining amount is reserved; 2, roughly turning the pyramid on a heavy horizontal lathe to the rough turning size of the figure 1; thirdly, the pyramid subjected to rough turning is subjected to overall thermal refining; fourthly, the pyramid is subjected to finish turning on a heavy horizontal lathe to reach the finish turning drawing size in the figure 3; fifthly, pyramid surface machining is conducted on three-axis machining equipment through an indexing rotary head, and a rotary head base is manufactured to be connected with a driving rotary head and a driven rotary head; step 6, roughly adjusting and fixing the connecting line angle of the rotary head; seventhly, the precision of the rotation angle is guaranteed through an indexing rotation head; and eighthly, the rotary head base is adjusted back, and the axis of the workpiece is parallel to the X axis of the machining equipment. According to the large-size pyramid machining technology, the large-size pyramid can be effectively machined on three-axis equipment, the machining precision of the large-size pyramid is ensured, and the economical efficiency and feasibility of pyramid machining are improved.

The application discloses a mechanical mechanism zero position adjustment tool, and relates to the technical field of zero position adjustment tools, comprising a base, a sliding block, a cushion block for providing auxiliary support for a mechanical mechanism, a first variable-diameter pin shaft, a second variable-diameter pin shaft, at least one adjustable cushion block for keeping the mechanical mechanism in a horizontal state and a vernier caliper; wherein the base is provided with a guide rail and a mounting block, and the left end of the guide rail is connected with the right end of the mounting block. The application can meet the pin shaft hole requirements of different specifications of mechanical mechanisms by adjusting the diameters of the first variable-diameter pin shaft and the second variable-diameter pin shaft, meet the zero position length requirements of different mechanical mechanisms by changing the position of the sliding block, and keep the mechanical mechanism in a horizontal and stable state during measurement by adjusting the height of the adjustable cushion block.

The invention discloses a tower crane standard knot main angle steel machining tool for a horizontal boring machine, which comprises a plurality of positioning devices, a supporting cross beam and a pressing device, the positioning devices are arranged on a workbench of the horizontal boring machine, and the positioning devices are arranged left and right at intervals; the supporting cross beam is horizontally arranged on the rear sides of the multiple positioning devices. The bottoms of the pressing devices are connected with a workbench of the horizontal boring machine, and the middles of the pressing devices are connected with the supporting cross beam. The processing method comprises the following steps: S1, fixing the length; s2, processing one surface of the end part; s3, processing the middle position; and S4, processing the other surface of the end part. The method can meet the machining requirements of standard knot main angle steel of different specifications, reduces the cost, and is high in machining precision and good in quality.