Internal supporting type fixture for turning external circles of thin-wall parts and application of fixture

Abstract

The invention relates to an internal supporting type fixture for turning external circles of thin-wall parts and an application of the fixture. The fixture comprises multiple supporting device units;the supporting device units are connected through telescopic axial connecting components; each supporting device unit comprises a supporting device mounting disk, multiple supporting disks and radialtelescopic arms; a gear is arranged inside each supporting device mounting disk; a rack is arranged at one end of each radial telescopic arm; one end of each radial telescopic arm is inserted in the circumferential side surface of the corresponding supporting device mounting disk to mesh with the corresponding internal gear, and the other end of each radial telescopic arm is fixedly connected withthe corresponding supporting disk; the length of the radial telescopic arms is adjusted by the aid of a rocker arm inserted in the supporting device mounting disks, so that the supporting disks are controlled to support the inner walls of the thin-wall parts. Compared with the prior art, the fixture has the advantages that the roundness and the straightness of the parts can be well guaranteed, and machining of the external circles of different series of thin-wall pipe fittings can be met.

Description

technical field [0001] The invention relates to a numerically controlled lathe mechanical equipment, in particular to an inner support fixture for turning the outer circle of thin-walled parts and its application. Background technique [0002] At present, when processing thin-walled parts, due to the thin thickness and low rigidity of thin-walled parts, large processing errors are caused during clamping and processing. The current processing methods for thin-walled parts are to ensure the roundness by cutting off the thin-walled parts at the deformed part, which greatly increases the production cost. When existing lathes process thin-walled parts, due to the small thickness and poor rigidity of the thin-walled parts, large vibrations will occur during the processing, resulting in large errors in the straightness of the machined surface. [0003] Patent CN205834846U discloses a jig for processing precision thin-walled tubular parts, including a mandrel body, rubber rings and...

AI Technical Summary

Problems solved by technology

[0002] At present, when processing thin-walled parts, due to the thin thickness and low rigidity of thin-walled parts, large processing errors are caused during clamping and processing

The current processing method of thin-walled parts is to ensure the roundness by cutting off the thin-walled parts at the deformation point, which greatly increases the production cost

When existing lathes process thin-walled parts, due to the small thickness and poor rigidity of the thin-walled parts, large vibrations will occur during the processing, resulting in a large error in the straightness of the machined surface

[0003] Patent CN205834846U discloses a jig for processing precision thin-walled tubular parts, including a mandrel body, rubber rings and metal rings are arranged at intervals on the circumference of the mandrel body, and the rubber rings and metal rings are arranged along the axis of the mandrel body. One end of the mandrel body is connected to the sliding sleeve through a spigot, and the mandrel body port at the end of the sliding sleeve is connected to the lock nut through threads. The clamp realizes the clamping of parts on the mandrel body by rotating the compression nut. , fixed, the inner hole of the part is supported through the expansion of the rubber ring in the diameter direction. This invention sets a flexible support in the internal control of the part, which will cause a large error in the straightness of the processed surface

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