High-frequency-response hydraulic servo tool bar system for boring and machine tool with same

Abstract

The invention discloses a high-frequency-response hydraulic servo tool bar system for boring and a machine tool with the same. The high-frequency-response hydraulic servo tool bar system solves the problem that in the prior art, piston special-shaped hole machining equipment is not suitable for high-frequency-response application occasions, and has the effects that the hydraulic servo tool bar system is added to serve as a third virtual shaft, a tool bar is controlled to move in the radial direction, and then the effect of non-circular hole machining is achieved. According to the technical scheme, the hydraulic servo tool bar system comprises an eccentric variable body and a hydraulic station, wherein the hydraulic station comprises a servo valve connected with the eccentric variable body,the servo valve is used for controlling hydraulic oil to obtain the pressure intensity which is in linear relation with a voltage signal according to an input voltage signal, the hydraulic oil acts on an oil cavity in the eccentric variable body, and the eccentric variable body realizes radial displacement compensation of a boring tool under the action of the hydraulic oil.

Description

technical field [0001] The invention relates to the field of boring equipment, in particular to a high-response hydraulic servo cutter bar system for boring and a machine tool with the system. Background technique [0002] The characteristics of the non-circular special-shaped hole surface are: the longitudinal section is a trumpet shape with both ends upturned; the cross section is non-circular, including ellipse and other asymmetrical curves. The servo control of the tool position during the boring process is the key to realize the machining of non-circular surface and special-shaped holes. [0003] According to the different radial feeding methods of the tool, the current domestic and foreign piston special-shaped hole processing equipment can be divided into: oblique cut type, mechanical imitation type and servo deformation tool rod type, etc. in, [0004] 1. The oblique cut type means that when the direction of the tool rotation axis is inclined to the axis direction ...

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Problems solved by technology

[0006] (2) It is impossible to change the relative position of the tool relative to the axis of the tool holder (or the axis of the spindle), and the radial feed movement cannot be realized;

[0007] (3) Combining with other feeding methods described later, it can form the boring of "flare mouth + fixed ellipticity" special-shaped pin holes, but it is difficult to adapt to the machining of variable ellipse and irregular non-circular shapes.

However, the wedge-shaped slider mechanism has friction and structural rigidity problems, and is also not suitable for high-response applications.

[0013] Zhejiang University, Shanghai Jiaotong University, etc. have also conducted research on other types of elastic deformation methods, and conducted experiments, and achieved some results, but have not yet formed a mature mechanism that can be applied to production

Japan's Kanzaki and Longze companies used the elastic deformation body of NT company to realize the boring of the special-shaped pin hole of the bell mouth, but there is no report on the high-speed precision boring of the complex three-dimensional space surface

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