Internal support vibration suppression device and deformation measurement method for thin-walled annular workpiece

Abstract

The invention provides an inner support vibration suppression device and a deformation measurement method suitable for a thin-walled annular workpiece, comprising a top cover, an auxiliary support assembly, a tooling base and a data acquisition control device, and a cylinder in the auxiliary support assembly drives the support head to support On the inner surface of the annular workpiece, it plays a role in suppressing vibration. Under the action of the milling machine cutting force, the annular workpiece is deformed, and the support head is displaced accordingly. The displacement sensor can measure the displacement of the support head to obtain deformation data. , the annular workpiece releases the residual stress, which leads to deformation again. At this time, the support head is extended again, so that the displacement sensor measures the displacement of the support head and then retracts, and the cycle reciprocates to measure the time series change data of the deformation after processing, so as to obtain the deformation measurement of the annular workpiece. data. The present invention provides auxiliary support for the annular workpiece 60 during the machining process, improves the local rigidity and damping of the workpiece, and further ensures the machining quality of the workpiece.

Description

technical field [0001] The invention relates to a machine tool tooling fixture, belonging to the technical field of aviation manufacturing, in particular to an inner support vibration suppression device and a deformation measurement method suitable for a thin-walled annular workpiece. Background technique [0002] Annular thin-walled parts are key components in aero-engines. With the continuous development of the aviation manufacturing industry, higher and higher requirements are placed on the machining accuracy of such key parts. Most of the annular thin-walled parts have complex structures and many surface features, making it difficult to use turning. Due to the low rigidity, during the milling process, under the action of cutting force, the workpiece is prone to chatter, springback and other phenomena, reducing the surface quality. Such phenomena reduce the efficiency of high-speed cutting. Therefore, in the processing of annular thin-walled parts, it is necessary to ad...

AI Technical Summary

Problems solved by technology

However, compared with the cylinder, the vibration suppression effect of the motor is poor, and the cost is high, and in the actual processing process, the waterproof problem of the motor needs to be considered. Compared with the cylinder with the same support force, the motor is larger and there is often reserved space too small to install

However, no matter which method is used, due to the use of different types of sensors and controllers, the wiring is cumbersome and not suitable for actual processing

The use of automatic auxiliary support devices depends on external processors or machine tool CNC systems, and the independence is not high

[0005] Patent document CN209175307U discloses a fixture for annular thin-walled parts, which includes: a cylindrical fixture support, an L-symmetrical step is arranged on the outer side of its upper end surface along the circumference and is not higher than the upper end surface, and the annular thin-walled part is placed On the step; at least three limit blocks, the limit blocks are evenly distributed around the circumference and fixedly arranged on the clamp support, one end of which is arranged on the upper end surface of the clamp support, and the end of the The side surface is in close contact with the inner ring surface of the annular thin-walled part; at least three pressing blocks, the pressing blocks and the limiting block are evenly spaced and fixed on the fixture support, and one end of the pressing block Press the upper end face of the annular thin-walled part, but this design cannot measure the stress relief deformation of the finished workpiece

Images