A Processing Technology of Large Flange with Cone Sealing Structure

Abstract

The invention relates to the technical field of machining, and discloses a processing technology of a large flange with a conical surface sealing structure. The processing technology comprises a flange outer conical surface rough lathe, a flange outer conical surface semi-finish lathe and a flange outer conical surface finish lathe, wherein the flange outer conical surface semi-finish lathe and the flange outer conical surface finish lathe are mounted on one numerical control vertical lathe; operation of the flange outer conical surface semi-finish lathe is completed at least through two-timefeed cutting; technological parameters of the last-time feed cutting of the flange outer conical surface semi-finish lathe are the same as technological parameters of feed cutting of the flange outerconical surface finish lathe; after the flange outer conical surface semi-finish lathe completes operation, the flange is placed on a high-precision three-coordinate detector to be detected, and processing errors of the flange outer conical surface semi-finish lathe are recorded; and during flange outer conical surface finish turning, the errors are compensated in the feed procedure of turning processing. According to the processing technology, ultrahigh-precision processing of flange outer conical surfaces is achieved, production cost is reduced, and the delivery date is shortened.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a processing technology of a large flange with a tapered sealing structure. Background technique [0002] Such as figure 1 Described is a flange with a tapered surface sealing structure in a certain valve body part. The material of the flange is alloy structural steel. The flange is provided with an outer tapered surface. A positioning inner spigot and a positioning outer spigot are respectively provided, and an inner taper hole connected with the inner hole of the flange is also arranged at the positioning outer spigot of the flange. The above-mentioned flanges are large flanges with an outer diameter exceeding 1 meter. Since the outer cone surface of the flange needs to cooperate with the valve body parts, the taper and roundness requirements of the outer cone surface are relatively high, and the design accuracy cannot be achieved by conventional turning. [00...

AI Technical Summary

Problems solved by technology

[0004] However, the use of the matching grinding process requires the design and manufacture of a dedicated large matching grinding tool. On the one hand, the cost of the large matching grinding tool is high and the manufacturing cycle is long; on the other hand, the matching grinding is labor-intensive and inefficient , unable to meet customer delivery cycle requirements

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