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A method for improving the surface integrity of high-volume metal matrix composites

A composite material and surface processing technology, which is applied in metal processing equipment, manufacturing tools, grinding machines, etc., can solve the problem of surface morphology of processed materials, surface roughness, surface residual stress, surface finish that cannot meet expectations, and diamond tools that cannot be rough. Processing, diamond tools increase processing costs and other issues, to achieve the effect of less surface impurities, low cost, and small tool wear

Active Publication Date: 2016-06-29
潍坊国科经贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of the reinforcing phase, the hardness of the composite material is greatly improved, and some traditional processing tools (tungsten carbide tools, etc.) and methods (electric discharge machining, wire cutting, etc.) will cause great damage to the surface of the cutting material. And large surface roughness and surface residual stress are too high, so that the high-temperature oxidation, pits, bumps and scratches on the surface of the processed material are obvious. The surface morphology, surface roughness, surface residual stress, surface The smoothness cannot meet the expected requirements; the hard reinforcing phase particles have a serious abrasive wear effect on the processing tool, and the tool life is too short. The use will greatly increase the processing cost, and the diamond tool cannot rough the workpiece

Method used

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  • A method for improving the surface integrity of high-volume metal matrix composites
  • A method for improving the surface integrity of high-volume metal matrix composites
  • A method for improving the surface integrity of high-volume metal matrix composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step: use homogeneous, high-hardness, high-flatness sintered ceramic diamond grinding head cutter;

[0033] Step 2: Use a milling machine or a machining center, control the spindle speed to 2000r / min, the feed rate to 400mm / min, and the back cutting amount to 0.5mm;

[0034] The third step: use a milling machine or a machining center to perform rough grinding and milling on the titanium carbide particle-reinforced aluminum matrix composite material with a volume of 40%;

[0035] Step 4: Select a grinding head tool with homogeneous, high hardness, and high flatness sintered ceramic diamond particles to perform fine grinding and milling on the sample after rough grinding and milling;

[0036] Step 5: Use a milling machine or machining center, control the spindle speed to 4000r / min, the feed rate to 400mm / min, and the amount of back cutting to 0.5mm;

[0037] Step 6: Use a milling machine or a machining center to finely grind and mill the titanium carbide partic...

Embodiment 2

[0043] The first step: use homogeneous, high-hardness, high-flatness sintered ceramic diamond grinding head cutter;

[0044] Step 2: Use a milling machine or machining center, control the spindle speed to 3000r / min, the feed rate to 300mm / min, and the back cutting amount to 0.3mm;

[0045] The third step: use a milling machine or a machining center to perform rough grinding and milling on the boron nitride particle-reinforced copper-based composite material with a volume of 50%;

[0046] Step 4: Select a grinding head tool with homogeneous, high hardness, and high flatness sintered ceramic diamond particles to perform fine grinding and milling on the sample after rough grinding and milling;

[0047] Step 5: Use a milling machine or machining center, control the spindle speed to 6000r / min, the feed rate to 300mm / min, and the back cutting amount to 0.3mm;

[0048] Step 6: Use a milling machine or a machining center to finely grind and mill the boron nitride particle-reinforced ...

Embodiment 3

[0054] The first step: use homogeneous, high-hardness, high-flatness sintered ceramic diamond grinding head cutter;

[0055] Step 2: Use a milling machine or machining center, control the spindle speed to 3500r / min, the feed rate to 350mm / min, and the back cutting amount to 0.4mm;

[0056] The third step: use a milling machine or a machining center to perform rough grinding and milling on the titanium boride particle-reinforced magnesium-based composite material with a volume of 60%;

[0057] Step 4: Select a grinding head tool with homogeneous, high hardness, and high flatness sintered ceramic diamond particles to perform fine grinding and milling on the sample after rough grinding and milling;

[0058] Step 5: Use a milling machine or machining center, control the spindle speed to 7000r / min, the feed rate to 350mm / min, and the back cutting amount to 0.4mm;

[0059] Step 6: Use a milling machine or a machining center to finely grind and mill the titanium boride particle-rein...

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Abstract

The invention provides a method for improving processed surface integrity of high-volume-fraction metal-matrix composite and belongs to the technical field of aerospace material processing. The method comprises the following steps: coarse grinding and milling, and fine grinding and milling are performed on the high-volume-fraction metal-matrix composite by using a specially-made grinding head tool, which is used for sintering diamond particles; the coarse grinding and milling are performed for enabling processed samples to basically reach size required by processing, and basically guaranteeing surface smoothness and surface roughness; on the basis of the coarse grinding and milling, the fine grinding and milling are performed for further improving surface roughness of material, reducing surface appearance damage, realizing high surface smoothness, and reducing residual stress on a surface layer. The grinding head tool for sintering diamonds overcome the defects that the surface of a workpiece of the high-volume-fraction metal-matrix composite is damaged seriously, the surface roughness is too large, the reduce residual stress on the surface layer is too large, and the tool is required to be repaired and replaced continuously during processing by using a conventional tool; the grinding head tool is compared with the diamond tool, the cost is reduced greatly, and the grinding head tool can be applied to coarse processing.

Description

technical field [0001] The invention relates to a method for improving the integrity of the processed surface of a high volume metal matrix composite material, which belongs to the technical field of aerospace material processing. Background technique [0002] High-volume ceramic particle-reinforced metal matrix composites (especially silicon carbide particle-reinforced aluminum-matrix composites) have high specific stiffness, high specific strength, good dimensional stability, good thermal conductivity, wear resistance and corrosion resistance, etc. Series of advantages, so it is widely used in aviation, aerospace, automobile manufacturing, weapons, optical precision instruments and other fields. However, due to the addition of the reinforcing phase, the hardness of the composite material is greatly improved, and some traditional processing tools (tungsten carbide tools, etc.) and methods (electric discharge machining, wire cutting, etc.) will cause great damage to the surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P13/02
CPCB24B19/00B24B55/02
Inventor 崔岩刘书奎王理华
Owner 潍坊国科经贸有限公司