Online measuring method and device for cutter radius compensation value of numerical control milling precision inferior arc

Abstract

The invention discloses an online measuring method and device for a cutter radius compensation value of a numerical control milling precision inferior arc, and the method comprises the steps: placing a standard block with a groove on a workbench, determining an auxiliary circle through a measuring needle in a lever indicator, and enabling the auxiliary circle to be tangent to the midpoint of the inferior arc; determining a corresponding X value and a corresponding Y value according to the origin coordinate value of the inferior arc and the center coordinate value of the auxiliary circle; moving the machine tool workbench to enable a machine tool spindle to reach the center position of the auxiliary circle; then moving a machine tool spindle to enable a measuring needle in the lever indicator to be in contact with the inferior arc, recording the grid degree of the dial plate deviating from the zero position, and calculating the actual radius of the inferior arc through the recorded grid degree; and finally, calculating the actual radius and the theoretical radius of the inferior arc, and calculating a corresponding compensation value according to the machining precision of the inferior arc. The online measuring method and device have the advantages of being simple in structure, convenient to operate and use, capable of improving the machining efficiency and precision, high in practicability and suitable for application and popularization.

Description

Technical field [0001] The present invention relates to machining techniques, and in particular relates to one kind of the tool radius compensation precision CNC milling minor arc-line measuring method and apparatus. Background technique [0002] In the field of mechanical processing, it will be related to different types of structural parts, in the aeronautical field, to involve a number of complex shaped structure member, such as figure 1 Latch hook part shown as a typical shaped member, because the shape of curved surfaces, can not be measured using conventional measuring tools, can be measured by projection and coordinate. Depending on design requirements, the parts A, B, C are three minor arc and minor arc of the machining accuracy at a relatively high requirement refers minor arc of less than a semicircular arc. [0003] For such shaped member, when the NC machining center, when the program has completed the shape, dimensions do not know how, and are not measured on the mac...

AI Technical Summary

Problems solved by technology

[0003] For this kind of special-shaped parts, when processing in the CNC machining center, when the outline program is finished, the outline dimensions are not known, and there is no way to measure them on the machine tool. The outline dimensions can only be measured by projection. If the outline dimensions are not When qualified, secondary processing must be carried out

During the secondary processing, it is necessary to clamp and align the workpiece again. If the state of the workpiece is inconsistent with that of the first clamping, the compensation value and the measured value will be found to be inconsistent through the secondary processing of the CNC, which will cause the workpiece to be scrapped.

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