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Matrix heat softening effect based high-efficiency high-precision milling technology of composite material

A thermal softening and milling technology, applied in milling machine equipment, manufacturing tools, details of milling machine equipment, etc., can solve the problems of difficult to achieve high machining accuracy requirements, low machining efficiency, tool wear and other issues

Inactive Publication Date: 2014-03-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] At present, the ordinary milling method is usually used for low-speed milling of aluminum-based silicon carbide materials. The processing efficiency is low, the tool wear is serious, and the surface roughness Ra value of the processed workpiece is generally greater than 1 μm, which makes it difficult to meet high processing accuracy requirements.

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  • Matrix heat softening effect based high-efficiency high-precision milling technology of composite material
  • Matrix heat softening effect based high-efficiency high-precision milling technology of composite material

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Embodiment Construction

[0007] to attach figure 2 The processing of a typical part of an aluminum matrix composite material with a SiC volume fraction of 65% is taken as an example. The complete processing process is divided into two steps: rough milling and fine milling. The tool used is a PCD tool with a particle size of 10 μm. The blunting standard of the tool is VC=0.6mm. The overhang length L of the rough / finishing tool is 3 times the tool diameter d. The end surface of the tool is shown in the attached figure 1 shown. The specific implementation process is as follows:

[0008] 1. Install the end mill on the corresponding tool position of the CNC milling machine, and install the 2mm thick cuboid workpiece on the milling machine table.

[0009] 2. The position of the workpiece is measured by the contact positioning probe of the CNC milling machine, and the coordinates of the workpiece center are obtained, and then the tool cutting coordinate point and the circular tool path are determined acco...

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Abstract

A matrix heat softening effect based milling technology of a high-volume-fraction (above 30%) SiC particle reinforced aluminum matrix composite material part is characterized in that milling process parameters, a PCD cutter granularity, a cutter glazing standard, a coarse / fine finishing cutter overhanging length / diameter, and the geometric dimension and shape of the above cutter are optimized in the invention in order to finally realize the high-efficiency high-precision milling of the material part, so the processed workpiece surface roughness Ra value stably reaches below 0.4mum.

Description

technical field [0001] The invention solves the problems of low processing efficiency, low processing precision and fast tool wear of aluminum-based composite materials reinforced by SiC particles with high volume fraction, and belongs to the field of metal cutting processing technology. Background technique [0002] Aluminum-based silicon carbide composites have excellent mechanical and physical properties such as high specific strength and specific stiffness, low thermal expansion coefficient, low density, high yield strength, good dimensional stability, thermal conductivity, wear resistance, and fatigue resistance, making them It is widely used in aerospace, automobile, military, electronics, sports equipment and other fields. However, the current aluminum matrix composites reinforced with high volume fraction SiC particles have problems such as low processing efficiency and precision, severe tool wear, etc., which seriously restrict their industrial application. [0003...

Claims

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Application Information

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IPC IPC(8): B23C3/00
Inventor 解丽静王西彬王涛彭松孙峰史兴宽付纳新
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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