A processing method of split metal sealing ring
A technology of metal sealing ring and processing method, which is applied in the field of mechanical processing, can solve the problems of unstable parts size, long processing process flow, and large processing stress, and achieve the goals of improving the dimensional stability of parts, shortening processing time, and increasing utilization rate Effect
Active Publication Date: 2019-03-01
AECC AVIATION POWER CO LTD
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Problems solved by technology
According to the current processing technology, after the workpiece is cut along the lap joint, a small half needs to be discarded, and the lap joint surface is milled, and the residual processing stress is large. Although it has been heat-treated, the thickness of the part is thin and it is easy to deform.
Therefore, after the entire part is processed, the material utilization rate is only 22.2%, and the processing process is long, the part size is unstable, and the processing efficiency is low
Method used
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Embodiment Construction
[0027] The present invention will be further explained below in conjunction with specific embodiments and accompanying drawings.
[0028] The present invention comprises the following steps:
[0029] 1) see figure 2 , the bar is processed into a tubular part with a length of 100-150mm, and the inner hole and outer circle radius of the tubular part are respectively reserved with a machining allowance of 1mm. The material of the tubular part is 1Cr11Ni2W2MoV, and the hardness HB is 311-388;
[0030] 2) Vacuum heat treatment is carried out on the tubular parts, and the hardness HB after vacuum heat treatment is 302-363;
[0031] 3) Use wire cutting to cut the tubular parts to get the metal sealing ring rough parts, leaving 0.15mm allowance on one side in the thickness direction, and ensure the flatness of the parts in the thickness direction of 0.01mm and the parallelism of 0.01 when used for double-sided truss grinding mm and lap length tolerance, the thickness of the step is...
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Abstract
The invention discloses a machining method for a split type metal sealing ring. The machining method aims at shortening the technological process, improving the dimensional stability of parts and increasing the utilization ratio of materials. According to the technical scheme, the machining method comprises the following steps that 1), a bar is machined into a tubular part, and the follow-up machining allowance is retained for an inner hole and an outer circle of the tubular part; 2), the tubular part is subjected to vacuum heat treatment; 3), the tubular part is cut through linear cutting, metal sealing ring coarse parts are obtained, and the machining allowance during double-sided honing is retained for the step thickness of the metal sealing ring coarse parts; 4), step face grinding treatment is conducted on the metal sealing ring coarse parts; 5), the two metal sealing ring coarse parts are paired and combined for double-sided honing; and 6), the paired combined metal sealing ring coarse parts are subjected to inner hole boring and outer circle grinding successively, and the split type metal sealing ring is obtained.
Description
technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a processing method of a split metal sealing ring. Background technique [0002] The split metal sealing ring is a metal sealing form commonly used in aero-engines. It is formed by lapping two semi-rings to form a full circle. The size and shape accuracy of the parts are required to be high. The flatness and parallelism are required to be 0.01mm, and the thickness tolerance is 0.02; the roughness of the two overlapping mating surfaces The requirement is Ra0.8. At present, the processing technology adopted is: inner car, outer circle, cutting-flat end face-cutting-milling step surface-heat treatment-grinding step surface-pairing-truss grinding plane-boring inner hole-grinding outer circle. According to the current processing technology, after the workpiece is cut along the lap joint, a small half needs to be discarded, and the lap joint surface is mille...
Claims
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IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/01
Inventor 杨能阁莫战海孙辉张亚军韩新艳杨飞飞路江英段瑞斐
Owner AECC AVIATION POWER CO LTD