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Hot-filament chemical vapor deposition batch preparation method of complicated-shape diamond coated cutting tool

A diamond coating and complex shape technology, which is applied in metal material coating process, coating, gaseous chemical plating, etc., can solve coating difficulties, poor heat conduction, and unsuitable CVD diamond coating complex shape carbide tools Batch preparation equipment and other issues

Inactive Publication Date: 2011-05-18
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the drill bit and the milling cutter are both slender shafts, which have poor thermal conductivity, which brings difficulties to the deposition of diamond coating by hot wire CVD
[0005] After searching the literature of the prior art, it was found that Chinese Patent Application No. 200310108306.0 describes a "device for preparing a diamond coating on an integral carbide rotary tool", which discloses a rotary shaft that can drive a tool to rotate The monolithic carbide tool diamond coating device, but the special deposition device specially made by the above technology is only an experimental equipment for a single monolithic carbide tool diamond coating with complex shapes, and is not suitable as a CVD diamond-coated complex shape cemented carbide tool. Batch preparation device

Method used

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  • Hot-filament chemical vapor deposition batch preparation method of complicated-shape diamond coated cutting tool
  • Hot-filament chemical vapor deposition batch preparation method of complicated-shape diamond coated cutting tool
  • Hot-filament chemical vapor deposition batch preparation method of complicated-shape diamond coated cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the CVD diamond coating is plated on the milling cutter for processing graphite, the diameter of the tool shank is φ4, the length of the blade is 30 mm, and the total length of the tool 5 is 100 mm. The structure of the cooling base of the sandwich cutter 5 used in this embodiment is: the copper block size is high, wide and long 30 × 30 × 100 mm, the corresponding size of graphite is 30 × 20 × 100 mm, and the thickness is a molybdenum sheet of 0.4 mm 1. Cut into 35×100mm, and drill 40 φ4.2 holes (hole depth: 40mm) at even intervals on the cooling base, so as to install and insert 40 milling cutters upright. The molybdenum sheet 1 covers the graphite block 2 to protect the graphite from being corroded by H atoms.

[0024] The first step, place the blade of the above-mentioned long handle milling cutter in Murakami agent for ultrasonic corrosion, the formula (weight ratio) of the corrosion solution: potassium ferricyanide: potassium hydroxide: ...

Embodiment 2

[0033] Plating CVD diamond coating on the milling cutter for processing graphite, the diameter of the tool shank is φ1, the length of the blade is 20mm, and the total length of the tool 5 is 50 millimeters. The structure of the cooling base of the sandwich cutter 5 used in this embodiment is: the copper block size is high, wide and long 30 × 30 × 100 mm, the corresponding size of graphite is 30 × 10 × 100 mm, and the thickness is a molybdenum sheet of 0.2 mm 1 Cut into 35×100 mm, drill 50 φ3.2 holes (hole depth 25 mm) evenly spaced on the cooling base, so as to install and insert 50 milling cutters upright.

[0034] The first step is to take 50 long-handle milling cutters mentioned above and carry out the same pretreatment as in Example 1. Insert the 50 milling cutter handles into the sandwich cooling base in 5 rows, 10 in each row, and place them on the hot wire. 5 On the water-cooled platform 4 of the CVD reaction chamber, the deposition of the diamond coating begins.

[00...

Embodiment 3

[0037] The CVD diamond coating is plated on the drill bit for processing carbon fiber reinforced composite materials. The diameter of the tool shank is φ6, the length of the blade is 35mm, and the total length of the tool 5 is 60 millimeters. The structure of the cooling base of the sandwich cutter 5 used in this embodiment is: the copper block size is high, wide, and long 30 × 30 × 100 mm, the corresponding size of graphite is 30 × 15 × 100 mm, and the thickness is a molybdenum sheet of 0.5 mm 1. Cut into 35×100 mm, and drill 35 φ6.2 holes (hole depth: 25 mm) evenly spaced on the cooling base, so as to install and insert 35 drill bits upright.

[0038] The first step is to take 35 long-handle milling cutters mentioned above, and carry out the pretreatment with Example 1. Insert 35 drill bit handles into the sandwich-type cooling base, 7 in each row, and place them in the 5CVD reaction chamber of the hot wire. On the water-cooled platform 4, the deposition of the diamond coati...

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Abstract

The invention discloses a hot-filament chemical vapor deposition batch preparation method of a complicated-shape diamond coated cutting tool in the technical field of mechanical machining, comprising the steps of: placing a sandwich type foundation on which the cutting tool is arranged on a CVD (Chemical Vapor Deposition) equipment water-cooling worktable through inserting a cutting tool holder of a pretreated complicated-shape hard alloy cutting tool; adopting two lines of hot filaments, wherein the upper line of hot filaments is as high as the nose of the hard alloy cutting tool and the lower line of hot filaments is as high as the bottom of the cutting edge of the cutting tool; and filling hydrogen and acetone and depositing a diamond coating on the surface of the complicated-shape hard alloy cutting tool. According to the the invention, the surface temperature of an underlayer at the cutting edge can be effectively reduced, the rate of the deposition is not decreased and the quality of the diamond coating is improved.

Description

technical field [0001] The invention relates to a method in the technical field of mechanical processing, in particular to a method for batch preparation of complex-shaped diamond-coated tools by hot-wire chemical vapor deposition. Background technique [0002] With the development of workpiece materials in the direction of lightweight and composite, high-silicon aluminum (lead) alloys, metal (ceramic) matrix composites, ceramics, carbon and graphite composites, other fiber-reinforced composites, laminate flooring and other difficult-to-process materials Used extensively in industries such as automotive, aerospace and tooling. Integral rotary tools based on WC-Co cemented carbide materials, such as twist drills, end mills and other complex-shaped tools, are widely used, and these tools wear seriously when processing the above-mentioned difficult-to-machine materials at high speed, and the processing Accuracy and surface quality are difficult to guarantee. [0003] Chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/27C23C16/44C23C16/458
Inventor 孙方宏张文骅张志明沈荷生郭松寿
Owner SHANGHAI JIAO TONG UNIV
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