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Two dimension moving three dimension rotating virtual shaft machine tool

A virtual axis machine tool, three-dimensional rotation technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems that are not suitable for processing large, complex curved surfaces, difficult to achieve large inclination angle processing, and complex CNC programming. Good structural shock resistance and cutting stability, realizing large inclination angle machining, and good processing technology

Inactive Publication Date: 2004-07-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the virtual axis machine tool based on the 6-SPS parallel mechanism also has disadvantages such as small working space, difficulty in realizing large inclination angle machining, complex and difficult NC programming, and easy interference between legs.
Therefore, the existing virtual axis machine tools are not suitable for machining large parts with complex surface types

Method used

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  • Two dimension moving three dimension rotating virtual shaft machine tool
  • Two dimension moving three dimension rotating virtual shaft machine tool
  • Two dimension moving three dimension rotating virtual shaft machine tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The principle of embodiment 1 is attached figure 1 As shown, the overall structure is figure 2 Shown. The virtual axis machine tool of this embodiment consists of a frame 6, a fixed platform 7 fixed on the frame, a movable platform 11 for installing cutting tools, a worktable 12 that can drive a workpiece to move in the Y direction, and both ends are respectively connected and fixed. The platform and the movable platform consist of 5 connecting legs. The 5 connecting legs, the movable platform and the fixed platform form a spatial parallel closed chain structure. The connecting leg 10 is designed with two moving pairs, one of which is the outer moving pair 4, which is driven by the servo motor 8 and is connected to the fixed platform 7 through the components of the moving pair. Under the action of the outer moving pair 4, the connecting leg can perform translational and telescopic movements in the X direction. The other moving pair is the follower inner moving pair, and t...

Embodiment 2

[0043] The overall structure of the virtual axis machine tool of this embodiment is as attached image 3 As shown, the overall structure and the structure of a connecting leg 10 containing two moving pairs are the same as those of Embodiment 1, except that a moving pair is designed with four legs with the same structure. The structural legs are all fixed-length The rod 19 and an outer moving pair are composed of a guide rail 20 set on the frame 6, a ball screw 18, and a ball nut slider 17 configured with the guide rail and the ball screw. The slider 17 is in the servo motor 16 and the ball screw 18 can slide up and down along the guide rail. One end of the fixed-length rod 19 is connected to the slider 17 through a Hooke hinge, and the other end is connected to the movable platform 11 through a spherical hinge. This embodiment can also enable the cutting tool on the movable platform to obtain two-dimensional movement and three-dimensional rotation.

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Abstract

A machine tool with 2D-moving and 3D-rotating virtual shafts is composed of a fixed platform, a movable platform for installing cutting tool to it, and a bench carrying workpiece to move in single direction. The fixed and movable platforms are linked via 5 legs containing moving pairs. One of 5 legs has two moving pairs and one ball joint to be linked to the movable platform. One of two moving pairs is linked with the fixed platform. Another 4 legs are linked to the fixed platform via Hooke's hinges and to the movable platform via ball joints. Its advantages are five-shaft linkage, simple structure,and high stability and precision.

Description

1. Technical Field [0001] The invention belongs to the technical field of numerical control machine tool manufacturing, and particularly relates to a novel virtual axis numerical control machine tool structure design. 2. Technical background [0002] The traditional CNC machine tool adopts a tandem mechanical structure. The disadvantages of this machine tool structure are the heavy structure, many parts, long transmission chain, bulky, complex structure, high cost, and uneven stress and thermal deformation of each part of the machine tool. The combined action of tension, pressure, bending moment, and torque in the machining process causes deformation and vibration of the machine tool, and the accumulation of errors leads to a reduction in machining accuracy. In addition, due to the heavy and bulky parts, the increase in speed and acceleration during processing is limited. [0003] The existing virtual axis machine tool based on the 6-SPS parallel mechanism as the prototype, becau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q41/04
Inventor 徐礼钜范守文李翔龙田贵云
Owner SICHUAN UNIV
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