Expanding core clamp with high coaxiality and using method thereof

Abstract

The invention discloses an expanding core clamp with high coaxiality. The expanding core clamp is used for clamping a workpiece from an inner cavity and comprises a supporting concentric shaft, a limiting taper end which sleeves one side of the concentric shaft, and a movable taper end which sleeves the other side of the concentric shaft; the limiting taper end is fixedly mounted with the concentric shaft; the movable taper end can slide along the concentric shaft; the side, close to the movable taper end, of the concentric shaft is provided with an external thread; a locking nut is arranged on the external thread of the concentric shaft; a tubular taper expanding core sleeves the portion, between the limiting taper end and the movable taper end, of the concentric shaft; a plurality of slits are uniformly processed in the two sides of the taper expanding core along the length direction; and the slits divide the taper expanding core into a first expanding core clack group close to the limiting taper end and a second expanding core clack group close to the movable taper end. The expanding core clamp is convenient for workpiece clamping, can rapidly finish the workpiece clamping, andenables the workpiece processing to keep high coaxiality.

Description

technical field [0001] The invention belongs to the technical field of core expansion fixtures, and in particular relates to a core expansion fixture with high coaxiality and a use method thereof. Background technique [0002] In the processing of some tubular parts, the precision is extremely high. Taking the aerial bomb as an example, in the processing and production of the shell of the aerial bomb, the processing precision of the shell of some aerial bombs is extremely high, so as to ensure that the bomb enters and exits. The smooth operation of the magazine, release, launch or explosion requires the machining accuracy error of the shell to be within the millimeter level. [0003] The shape of the shell of the aerial bomb shell is mostly a curve that adapts to the fluid mechanics. In order to ensure the integrity of the outer wall of the shell, in the CNC turning process, it is necessary to cut out the shape of the shell from the beginning to the end with one knife. There...

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Problems solved by technology

[0004] In addition, if the ordinary two ends are fixed in opposite directions, due to the difference in the diameter of the inner cavity of the shell of the aerial bomb shell, the coaxiality between the shell of the aerial bomb shell and its inner cavity is often low, resulting in the problem of unqualified products.

[0005] Moreover, due to the higher and higher processing precision requirements in production orders, the product failure rate is getting higher and higher. After investigation, it is found that the current expanding core fixtures cannot meet the current processing needs due to the difficulty in ensuring high coaxiality.

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