Automatic centering fixture for workpiece with revolution boss and/or hole

Abstract

The invention discloses an automatic centering fixture which comprises a base plate, at least one internal clamping device, at least one external clamp and a centering drive device, wherein a plurality of guide rails are radically and uniformly arranged on the base plate; an automatic centering slide block is arranged on each guide rail in a sliding manner; each internal clamping device is fixed on the corresponding automatic centering slide block so as to achieve the centering effect through tightly clamping the workpiece from an inner hole or propping against the workpiece from the outer outline of a revolution boss; the external clamps are radically mounted on the base plate so as to clamp the workpiece from the outer outline of the revolution boss; and the centering drive device is used for driving the automatic centering slide blocks to slide along the guide rails, so as to enable the internal clamping devices to be suitable for inner holes with different diameters and to achieve the clamping of the workpieces. Due to the adoption of the fixture provided by the invention, the workload and time for clamping and centering the workpiece with the revolution boss and / or the hole are greatly reduced, and the centering is accurate and the clamping is reliable.

Description

technical field [0001] The invention relates to the field of clamps in mechanical cutting, in particular to a clamp for automatic centering and locking of parts with rotary bosses or rotary holes. Background technique: [0002] In mechanical cutting, in order to ensure the machining accuracy of the workpiece, there must be accurate positioning between the processing machine tool and the workpiece, that is, the precise clamping and positioning of the workpiece is an important factor to ensure the machining accuracy. Especially for parts with revolving bosses and / or revolving holes, such as large-scale revolving parts, etc., it is usually necessary to perform axis positioning during processing, and to perform multiple clamping and positioning. The selection of clamping fixtures for such parts Very important. [0003] At present, there is no special fixture for the positioning between the on-site processing machine tool and large parts. Generally, it is the fixture that comes ...

AI Technical Summary

Problems solved by technology

However, this positioning fixture needs to be threaded on the workpiece to be clamped before clamping, so as to fix the positioning member on the workpiece, and the process is complicated

The fixture is only positioned and clamped for one type of workpiece, and cannot be adjusted according to the aperture or diameter of the workpiece. Workpieces of different sizes or shapes need to be equipped with different fixtures, which has poor flexibility.

In addition, it is difficult for this fixture to ensure accurate centering of workpieces with rotary bosses or holes

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