Series-multiple connection type flat lower-mobility virtual axis machine tool

Abstract

A hybrid plane lower-mobility virtual axis machine tool belongs to the technical field of mechanical manufacturing. The main structure of the hybrid plane lower-mobility virtual axis machine tool generally includes a fixed platform, an AC axis, a movable platform, four connection branched chains, two sliding seats and two upright posts. A parallel connection part of the machine tool has two translational freedom degrees on a plane, while a series connection part (that is, the AC axis) has two rotation freedom degrees in a space. In order to apply the machine tool in the processing industry successfully, a relatively weak link, that is, the static stiffness of the non-plane direction, of the structure needs to be improved. In the invention, four connecting bars are used for strengthening the connection branched chains, the integrity is improved, and the whole static stiffness, especially the static stiffness of the non-plane direction, of the machine tool is enhanced. The invention can raise the static stiffness of the non-plane direction of the machine tool and is characterized by small motion mass, low manufacturing cost, easy maintenance, and so on.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a hybrid plane virtual axis machine tool with few degrees of freedom that can process complex curved surfaces on large workpieces. Background technique [0002] Virtual axis machine tool is a research hotspot in machine tool manufacturing industry worldwide in recent years. In order to overcome the shortcomings of traditional six-degree-of-freedom virtual-axis machine tools such as small working space, poor machining accuracy, and complex kinematic design, people gradually began to choose virtual-axis machine tools with less degrees of freedom for the processing industry. Among them, the planar virtual axis machine tool with few degrees of freedom based on the planar two-degree-of-freedom parallel mechanism has been widely valued and applied, and relevant manufacturers have developed several prototypes that can be used in actual production. [0003] This type of machine too...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantage of relatively weak static stiffness in the non-plane direction of the hybrid plane virtual axis machine tool with few degrees of freedom, and use four connecting rods to reinforce the structure of the machine tool, so as to improve the static stiffness of this type of machine tool in the non-plane direction the goal of

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