Machining technology for high-precision outer conical surface thin wall sleeve
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A processing technology and technology of the outer cone surface, which is applied in the field of high-precision outer cone surface thin-walled sleeve processing technology, can solve the problems of high precision requirements and easy deformation, and achieve the goals of avoiding force deformation, reducing deformation, and excellent manufacturing methods Effect
Inactive Publication Date: 2014-01-08
CRRC QISHUYAN CO LTD
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The main difficulty is that the wall is thin, the precision is high, and it is easy to deform during processing. Compared with the general taper ring gauge, the shape is just opposite
[0003] After investigation, there is currently no domestic manufacturer that can produce this type of high-precision outer cone thin-walled sleeve, and can only rely on imports.
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[0025] A high-precision outer tapered thin-wall sleeve processing technology, including the following process: blank→spheroidizing annealing→rough turning→quenching and tempering→semi-finishing turning→finishing turning→drilling→stress relief→surface grinding→rough grinding→two Secondary stress relief→grinding surface→turning spiral groove→grinding surface→fine grinding→wire cutting→turning end face→engraving serial number→testing→qualified product→press fitting→checking taper fit→printing serial number of paired parts→cleaning→oiling → Storage. In this plan, through two grindings and corresponding stress relief heat treatment, the coarse grinding amount is 0.5~0.6mm, and the fine grinding amount is about 0.2~0.3mm. can be produced as figure 2 The high-precision outer tapered thin-walled sleeve that meets the technical requirements can make the roundness of the inner hole reach 0.012, and the coaxiality between the outer tapered surface and the inner hole reach 0.02. But in...
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Abstract
The invention relates to the technical field of high-precision part machining process, in particular to a machining technology for a high-precision outer conical surface thin wall sleeve. The machining technology includes the following technology processes of workblank preparing, spheroidizing annealing, rough turning, thermal refining, semi-finish turning, finish turning, hole drilling, distressing, plane grinding, rough grinding, secondary distressing, plane grinding, spiral groove turning, plane lapping, accurate grinding, wire-electrode cutting, end face turning, serial number engraving, detecting, qualified product obtaining, press fitting, conical surface fit detecting, part matching and serial number printing, cleaning, lubricating oil coating and warehousing. A double-end vertical type numerical control grinder is adopted as a finishing machine, and through the machining methods of rough grinding and accurate grinding or rough grinding, semi-accurate grinding and accurate grinding, the technical requirements of the high-precision outer conical surface thin wall sleeve can be met; through the corresponding distressing heating processing technology, residual stress in the machining process is removed, deformation in the machining process can be reduced, the yield of products is improved, and finally the good manufacturing method of the high-precision outer conical surface thin wall sleeve is provided.
Description
technical field [0001] The invention relates to the technical field of high-precision parts processing technology, in particular to a high-precision processing technology for outer tapered thin-wall sleeves. Background technique [0002] A high-precision outer cone thin-walled sleeve is involved in the assembly of the flywheel flange of the crankshaft accessory of the imported locomotive. The diameter of the outer cone is φ223.18, the straightness is 0.01, and the roughness is Rz4; Degree 0.012, roundness of inner hole 0.012, roughness Rz4; coaxiality of outer cone surface and inner hole 0.02. The main difficulty is that the wall is thin, the precision is high, and it is easy to deform during processing. Compared with the general taper ring gauge, the shape is just opposite. [0003] After investigation, at present, there is no domestic manufacturer that can produce this type of high-precision outer cone thin-walled sleeve, and can only rely on imports. Contents of the in...
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