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One-axis stepping and three-axis linkage space curved surface milling method

A three-axis linkage and curved surface technology, which is applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problems of shape accuracy and surface quality machining, difficulty in controlling the curved surface of machining tool workpieces, and different cutting speeds for removal volume, etc., to achieve The effect of stable surface quality, improved surface quality, and efficient continuous cutting

Inactive Publication Date: 2014-04-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spatial surface parts usually adopt sintering, casting, forging and other manufacturing methods, but the shape accuracy and surface quality still require subsequent machining
Because the space surface is relatively complex, it is very difficult to control the attitude of the processing tool and the position of the workpiece surface, especially in places with different curvatures of the space surface of the workpiece, the shape accuracy and surface quality will exist due to the different working conditions of the processing tangent point Unstable factors such as different removal rates and different cutting speeds
At present, the control method of acceleration and deceleration of the milling cutter is mainly considered, and the control technology of the cutting condition of the tangential point is rarely involved.

Method used

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  • One-axis stepping and three-axis linkage space curved surface milling method
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  • One-axis stepping and three-axis linkage space curved surface milling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A 4-axis machining center (VMC850L) is adopted, the main axis is the Z axis, which can interpolate up and down, the workbench can interpolate horizontally on the X axis and the Y axis, and the A axis indexer is installed on the workbench, and the axis line of the A axis is aligned with the X axis. Axis coincidence, can be used for interpolation rotation. A spherical milling cutter 1 with a radius of 4mm is installed on the axis 2 of the milling machine. The material of the milling cutter is SMG tungsten steel with Al-Ti-N coating. The workpiece 3 (artificial hip joint prosthesis handle) is 7075 aluminum-zinc-magnesium-copper It is a high-strength aluminum alloy with a hardness of HRC55, a length of 420mm, and a diameter of 100mm. It is installed on the A-axis indexer. The center line of the workpiece 3 coincides with the axis line of the A-axis. The processed space surface is designed as a three-dimensional artificial hip joint prosthesis handle. model, such as figure ...

Embodiment 2

[0021] A 4-axis machining center (HASS VF-2) is adopted, the Z-axis of the main shaft can interpolate up and down, the worktable can interpolate horizontally with the X-axis and Y-axis, the A-axis indexer is installed on the worktable, and the axis line of the A-axis is in line with the The X-axis coincides and can be used for interpolation rotation. A spherical milling cutter with a radius of 5mm is installed on the main shaft 2. The material of the milling cutter is cBN. The workpiece 3 (artificial hip joint prosthesis handle) is SKD11 die steel with a hardness of HRC55. It is 420mm long and 100mm in diameter. It is installed on the A-axis indexer. The line coincides with the axis line of the A axis, and the processed space surface is designed as a three-dimensional model of the artificial hip joint prosthesis handle, such as figure 1 shown. First, along the Z-axis direction, the upper and lower curved surface parts are divided into 4 parts by the center line of the workpie...

Embodiment 3

[0023] A 4-axis machining center (HASS VF-2) is adopted, the Z-axis of the main shaft can interpolate up and down, the worktable can interpolate horizontally with the X-axis and Y-axis, the A-axis indexer is installed on the worktable, and the axis line of the A-axis is in line with the The X-axis coincides and can be used for interpolation rotation. A spherical milling cutter with a radius of 3mm is installed on the spindle 2, the material of the milling cutter is PCD, and the workpiece 3 (artificial hip joint prosthesis handle) is titanium alloy, with a length of 380mm and a diameter of 100mm, and is installed on the A-axis indexer. The axis lines coincide, and the processed space surface is designed as a three-dimensional model of the artificial hip joint prosthesis stem, such as figure 1shown. First, along the Z-axis direction, the upper and lower curved surface parts are divided into 4 parts by the centerline of the workpiece for rough machining, and the amount of axial ...

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Abstract

The invention discloses a one-axis stepping and three-axis linkage space curved surface milling method. The method comprises the following steps: a spherical milling cutter of which a working spherical surface is distributed with cutting blades is fixed on a milling machine spindle; a three-claw chuck is fixed on a horizontal work bench capable of carrying out horizontal interpolation motion along an X axis and a Y axis; a work-piece of which the section is round is fixed on the three-claw chuck, and can rotate around a central line of the work-piece; interpolation motion is carried out to drive the work-piece in the X-axis direction and fixed after stepping of an interval of 0.01-10mm when the work-piece is milled; the spherical milling cutter carries out interpolation motion of the Y axis and the Z axis and rotary interpolation motion along the track of the cutter and cuts the work-piece along the track curve of a two-dimensional knife; the offset angle alpha formed by a normal direction on a cutting point of the space curved surface and the rotation axis of the spherical milling cutter is adjusted to be an acute angle. By adopting the one-axis stepping and three-axis linkage space curved surface milling method, the fairness of the processed space curved surface can be improved, and a shape error and the surface roughness of the processed space curved surface are reduced.

Description

technical field [0001] The invention relates to a milling processing method, in particular to a space curved surface milling processing method with one-axis stepping and three-axis linkage, and belongs to the technical field of high-precision and high-surface-quality manufacturing of components. Background technique [0002] Artificial joint prostheses, engine crankshafts, and aerospace parts mostly use complex arbitrary curved surfaces in space, but their shape accuracy and surface quality directly affect their working performance. Spatial surface parts usually adopt sintering, casting, forging and other manufacturing methods, but the shape accuracy and surface quality still require subsequent machining. Because the space surface is relatively complex, it is very difficult to control the attitude of the processing tool and the position of the workpiece surface, especially in places with different curvatures of the space surface of the workpiece, the shape accuracy and surfa...

Claims

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Application Information

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IPC IPC(8): B23C3/08
Inventor 谢晋黎宇弘李青杨林丰
Owner SOUTH CHINA UNIV OF TECH