Thin-wall part supporting device and milling stability forecasting method

Abstract

The invention relates to the field of advanced manufacturing and particularly relates to a thin-wall part supporting device and a milling stability forecasting method. According to the thin-wall part supporting device, the support postures with different spatial shapes can be completed on a support table by cooperation between a matching button and a ring rail and between the matching button and a sliding rail; thin-wall parts can be effectively supported and fixed; more accurate modal parameters can be attained by clamping through the support device, so that the stability limit which is forecasted by using a radial basis function is more accurate; the thin-wall part supporting device is more suitable for production and is capable of providing reliably theoretical support for actual operators.

Description

technical field [0001] The invention relates to the field of advanced manufacturing, in particular to a supporting device for thin-walled parts and a method for predicting milling stability. Background technique [0002] As our country continues to integrate into the global market, the manufacturing industry is facing more and more competitive pressure. High-speed cutting technology has emerged and has been widely used in the manufacture of complex parts in the fields of aviation, aerospace, ships, molds and automobiles. Wall parts are typical complex parts, and they are used more and more in the industrial field. Due to the weak rigidity of thin-walled parts, chatter is prone to occur during milling, which seriously affects the surface quality of the workpiece, reduces the service life of the machine tool and the tool, and may cause damage to the machine tool. Predict the chatter stability of the milling process, choose the appropriate processing conditions, can control th...

AI Technical Summary

Problems solved by technology

Due to the weak rigidity of thin-walled parts, chatter is prone to occur during milling, which seriously affects the surface quality of the workpiece, reduces the service life of the machine tool and the tool, and may cause damage to the machine tool

Predict the chatter stability of the milling process, choose the appropriate processing conditions, can control the occurrence of chatter, improve processing efficiency, and reduce processing costs. At present, when predicting stability, it is necessary to obtain machine tool-spindle- The modal mass, modal damping, modal stiffness and other parameters of the tool-workpiece system, but the acquisition of these parameters is affected by the clamping posture and state of the workpiece. Due to the weak rigidity of thin-walled parts, the acquisition of modal parameters is often It is not accurate enough, especially in the hammering test, the applicability of ordinary fixtures is poor, and it cannot meet the experimental requirements, which greatly increases the manufacturing cost

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