38results about How to "Good consistency of precision" patented technology

The invention provides a drilling method for a carbon grid assembly of an iron propeller, belongs to the field of iron propeller manufacturing, and relates to a mechanical processing method of pairs of drill holes of the carbon grid assembly under one-time clamping by utilizing a mode for cooling drill holes through a step drill and external sprayed high-pressure liquid nitrogen. The method comprises the steps that firstly, the spherical-crown-shaped carbon grid assembly is clamped on a machine table in a 'sandwich' mode, the step drill is used for different diameters of small holes in pairs of the carbon grid assembly at a time, and the high-pressure liquid nitrogen is used for cooling processing to reduce the cutting temperature; then, drilling of other carbon grid array holes is completed under the control of a numerical control system. The method effectively reduces burrs and lamination defects which are caused by drilling by adding upper and lower supporting plates of the carbon grid assembly, the liquid nitrogen is used for cooling processing to greatly reduce the temperature of a cutting area, and oxidation, ablation and other defects of the carbon grid assembly are effectively restrained; the position precision of the array holes of the carbon grid assembly is ensured by using the step drill to process the holes in pairs at a time, the processing efficiency is high, andthe precision uniformity is good.

The invention discloses a sloping cover sleeve product machining clamp. The sloping cover sleeve product machining clamp comprises a locating block, locating clamping jaws, a guide rod and a base, wherein the locating block comprises a lug boss raised in the middle and a supporting platform arranged on the edge; the locating block and the base are fixedly arranged, and center shafts of the locating block and the base are intersected; the base is fixedly connected to a machine tool; the lug boss is of a hollow structure, and through holes are formed in the side surfaces of the lug boss in directions vertical to the center shaft; the locating clamping jaws are arranged in the through holes, and first wedge-shaped surfaces are formed at one sides, which face to the center shaft of the lug boss, of the locating clamping jaws; and the guide rod is arranged in the hollow structure of the lug boss, the top of the guide rod is supported against the first wedge-shaped surfaces, and the bottom of the guide rod is connected to a feed shaft of the machine tool. The sloping cover sleeve product machining clamp has the advantages of good repeatability and accuracy consistency, high machining efficiency and reliability, good appearance quality of product surfaces, high size accuracy, good machining stability, high degree of automation, low cost, and easy maintenance and assembly and has good economic benefits.

The invention provides a special planer for slide valve processing and its processing method, comprising: planer support mechanism, automatic rotation mechanism and planer movement mechanism; the automatic rotation mechanism includes tension screw and at least a pair of conical Elastic tire expansion; the planer support mechanism is set on the automatic rotation mechanism to fix and support the automatic rotation mechanism; the automatic rotation mechanism is simple in structure and can realize the intermittent movement of the slide valve, while ensuring that the slide valve is placed twice terminal neutrality requirements. The planer kinematic mechanism is provided with a planer that slides up and down, and the planer performs left-right reciprocating linear motion in the axial direction, and vertically moves up and down in the radial direction. The invention is used to solve the problems in the prior art that the machining of the outer circle of the slide valve of the vacuum pump has a low degree of automation, low machining efficiency and difficulty in ensuring consistent precision.

The invention relates to a multi-hole drilling transmission mechanism which can be used for processing a plurality of holes at the same time, belonging to the technical field of machining; the multi-hole drilling transmission mechanism comprises an upper plate, a middle plate and a lower plate, wherein a plurality of drilling rod shafts are respectively and rotatablely supported on the middle plate and the upper plate; the drilling rod shafts are respectively and fixedly provided with a drill bit; the lower plate is provided with drilling rod holes, and the drill bits can respectively and conveniently pass through the drilling rod holes in a corresponding way; the middle plate and the upper plate are also respectively provided with a plurality of support sleeve mechanisms which are used for relatively fixing the upper plate and the middle plate; the lower plate is provided with a plurality of guide pillars which are respectively and correspondingly matched with inner holes of the support sleeve mechanism up and down in a sliding way; two hollow shaft sleeves are respectively and rotatablely supported at the centers of the middle plate and the upper plate; two thread guide sleeves which are respectively sheathed in the hollow shaft sleeves in a matching way and can synchronously rotate together with the hollow shaft sleeves are rotatablely supported on the lower plate; a lifting screw rod shaft matched with the thread in each thread guide sleeve passes through each hollow shaft sleeve; the upper ends of the lifting screw rod shafts are connected with the upper plate in a rotary support way; the hollow shaft sleeves are connected with the drilling rod shafts by a main transmission mechanism in a transmission way; and hollow shaft sleeves are connected with the lifting screw rod shafts by a feeding mechanism in a transmission way.

The invention discloses a machining device used for machining an anti-clamp groove of an ultrathin diamond cutting piece. The machining device comprises a workpiece clamping unit, an electrolytic power supply, spraying nozzles, an electrolytic circulation filter unit, a conductive grinding head moving guide unit, a grinding rotation unit, a fixed platform and a grinding force loading unit; a workpiece is connected to an anode of the electrolytic power supply, the two conductive grinding heads are connected with a cathode of the electrolytic power supply, and the two conductive grinding heads are symmetrically arranged on both sides of the workpiece; and four springs with the same specification are adopted to apply same flexible pressing force to the left conductive grinding head and the right conductive grinding head, the two spraying nozzles are mounted on the inclined upper portion of the tangent position of the two conductive grinding heads and the workpiece, and circulating electrolyte supplying is conducted through the electrolytic circulation filter unit. According to the machining device used for machining the anti-clamp groove of the ultrathin diamond cutting piece, machining of the double-face annular anti-clamp groove is achieved through the machining mode of simultaneous rotating of the workpiece and the two conductive grinding heads, the machining precision and thesurface quality of the anti-clamp groove are improved, symmetry of the anti-clamp groove is better, and the machining efficiency of the workpiece is higher.

The invention discloses a method for machining half-and-half casings of a gas compressor of an aero-engine. The method comprises the following steps that a, flatness processing is carried out on the longitudinal faying surfaces of the two half-and-half casings, wherein plane processing is carried out on the two half-and-half casings after rough machining in a mode that the base levels abut against each other so as to ensure the flatness of the longitudinal faying surfaces of the two half-and-half casings; b, the mutual location degree processing is carried out on corresponding screw installation holes in the longitudinal faying surfaces of the two half-and-half casings, wherein finish machining is carried out on at least part of screw installation holes which are correspondingly formed, and screws provided with locating cylindrical surfaces are arranged in the screw installation holes after the finish machining in a matched mode; c, the screws are assembled in the screw installation holes of the longitudinal faying surfaces of the two half-and-half casings according to the preset optimized assembly sequence; d, the two half-and-half casings form an integrated casing of the gas compressor. The method for machining the half-and-half casings of the gas compressor of the aero-engine adopts the half-and-half casing combined deformation control technology, combined deformation of the half-and-half casings is eliminated, the accuracy of consistency of repeated combination is good, and the application prospects are wide.