Online following diameter measurement method and device in following grinding

Abstract

The invention relates to an online following diameter measurement method and a device in following grinding. The method is to enable two jaws of a double-jaw measurement head to be always elastically clamped on the outer diameter of a processed cylinder in the grinding process; the rotating degree of freedom of the processed cylinder corresponding to the double-jaw measurement head is retained; the eccentric revolving processed cylinder drives the double-jaw measurement head to perform the following motion along with the processed cylinder; the device is to coaxially hinge the double-jaw measurement head with a V-shaped body and to hinge cylinders at the two ends between the two; the two-way actions or stationary actions of the cylinders are used for realizing that the measurement head is close to and far from the V-shaped body or is relatively fixed with the V-shaped body; a rotating valve is arranged on an oil return way of an oil cylinder corresponding to the building process of the V-shaped body; a valve rod of the rotating valve is coaxially fixed with a rotating shaft of a swing arm; and when the swing arm downwards swings to a preset position before a terminal, the valve rod rotates to a position of rightly closing the oil return way. The device is higher in measurement precision compared with a device using a single-point measurement head; and the V-shaped body can quickly, stably and accurately joined on a workpiece, so that the reliability is higher, and the cost is low.

Description

technical field [0001] The invention relates to an on-line diameter measurement method and device used in the field of machining, and is especially suitable for on-line measurement of the diameter of a machined part in an eccentric running state during machining. Background technique [0002] The grinding process of crankshaft connecting rod neck is mainly divided into concentric grinding and following grinding. The main journal is used as the center of rotation, while the connecting rod neck is rotated in an eccentric state, and then the grinding wheel is ground in a reciprocating linear synchronous motion of advancing and retreating in a direction perpendicular to the center of rotation. [0003] At present, the on-line measuring devices used in follow-up grinding of crank pin neck are all measuring devices using single-point measuring head. The general use of single-point probes in concentric grinding of outer circles is as follows: Figure 6 As shown, the single-point m...

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the above-mentioned defects in the prior art, the present invention provides a brand-new method and device for measuring the diameter on-line during follow-up grinding. The problem of smooth and accurate lapping on the workpiece with absolutely no possibility of failure, while the cost of the device is very low

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