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CVD diamond thick-film ophthalmology scalpel manufacturing device and manufacturing method

A diamond thick film and manufacturing device technology, applied in the field of tools, can solve the problems of inapplicability to precision and ultra-precision machining, deep surface damage layer, slow polishing speed, etc., to overcome processing difficulties, high diamond surface quality, and low grinding pressure Effect

Active Publication Date: 2011-07-20
SHENZHEN XINYUNXIANG PRECISION CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]First, the polishing speed is extremely slow, and it takes several days to polish a diamond film
The second is the poor quality. The surface roughness of the polished diamond film can only reach the order of Ra 0.1 μm, which is far from the mirror surface, let alone the nanometer surface.
At the same time, due to the severe impact during mechanical polishing, a deep surface damage layer will also be produced.
It is no longer suitable for precision and ultra-precision machining

Method used

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  • CVD diamond thick-film ophthalmology scalpel manufacturing device and manufacturing method
  • CVD diamond thick-film ophthalmology scalpel manufacturing device and manufacturing method
  • CVD diamond thick-film ophthalmology scalpel manufacturing device and manufacturing method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: as Figure 1-3 Shown, a kind of manufacture method of CVD diamond thick film ophthalmic scalpel comprises the following steps:

[0032] Step 1: Cut the CVD diamond thick film material by laser method, and cut it into the required size;

[0033] Step 2: Shape grinding and polishing; using planetary grinding and polishing, the speed is 60 rpm, and the pressure is 1Kpa;

[0034] Step 3: Thickness grinding and polishing; grinding into thin slices, speed 3000 rpm, pressure 200Kpa; natural diamond is a typical brittle material, CVD diamond thick film is relatively more brittle, and because of its polycrystalline structure, the grinding hardness is The average hardness of diamond does not have the softest direction like natural diamond (the difference in grinding hardness between the soft and hard directions on the diamond grain is more than 100 times), so grinding is more difficult. In the process of grinding it into a thin sheet of 0.2X1X6mm, the diamond is e...

Embodiment 2

[0050] Embodiment 2: structure as embodiment 1,

[0051] The invention uses the original planetary grinding and polishing method, thermochemical grinding method and ultra-high-precision air bearing as the main shaft of the grinding and polishing machine. The diamond thick film material is brittle, the hardness is average, there is no softest direction, and the technical difficulty of being easy to damage realizes the high-precision requirements of the ophthalmic scalpel. After the completion of the project, it will open a new era of domestic diamond scalpels, fully meet the processing accuracy and sharpness requirements of imported diamond scalpels, replace traditional metal blades, and greatly reduce the damage to the eyes caused by ophthalmic surgery.

[0052] The typical shape of diamond tip part of diamond ophthalmic scalpel is as follows figure 1 Shown: Its external dimensions are 0.2X1X6mm, the tip angle is 45°, and the blade wedge angle is 38°. The straightness of the...

Embodiment 3

[0068] A CVD diamond thick-film ophthalmic scalpel with an external dimension of 0.2X1X6mm; a blade tip angle of 45° and a blade wedge angle of 38°; the blade’s straightness reaches 0.1 μm, which is perfect under a 500-5000 times microscope; The radius of the blade arc is 0.05μm; the surface roughness of the tool is less than Ra0.005μm.

[0069] Or a CVD diamond thick film ophthalmic scalpel with a tip angle of 35° and a blade wedge angle of 30°; the straightness of the blade reaches 0.1 μm; the radius of the arc of the blade is 0.05 μm; the surface roughness of the blade is less than Ra0.005 μm.

[0070] Or a CVD diamond thick film ophthalmic scalpel with a tip angle of 50° and a blade wedge angle of 40°; the straightness of the blade reaches 0.1 μm; the radius of the blade arc is 0.05 μm; the surface roughness of the blade is less than Ra0.005 μm.

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Abstract

The invention discloses a CVD diamond thick-film ophthalmology scalpel manufacturing device and a manufacturing method, which belong to the technical field of instrument. A planetary grinding-polishing mode is adopted, and the device comprises a grinding disc, a heater, a bracket, a force measuring strain gauge, a temperature measuring sensor, a fixture, an air inlet pipe, a shaft, a bearing, a worktable, a support, a motor and a pulley; the shaft is fixed on the support by the bearing, the support is connected and fixed with the worktable, and one end of the shaft is provided with the pulleyand is connected with the motor which is provided with a pulley by a belt; and the other end of the shaft is fixedly connected with the grinding disc. The invention has the advantages of utilizing the high-temperature diffusion principle of diamond, innovatively introducing a thermochemical diffusing-grinding mode to grind the CVD diamond thick-film ophthalmology scalpel, overcoming long-standingproblems of machining the CVD diamond thick film and obtaining good grinding speed, high diamond surface quality, precise shape precision and blade quality.

Description

technical field [0001] The invention relates to a CVD diamond thick-film ophthalmic scalpel manufacturing device and a manufacturing method, belonging to the technical field of tools. Background technique [0002] CVD thick film diamond scalpels are mainly used in ophthalmology fields such as cataract restoration of vision. At present, the knives used in cataract surgery in my country are mainly metal blades (if the patient proposes to use a diamond scalpel, a high fee will be charged), which seriously damages the tissue, prolongs the healing period, and affects the treatment effect. The straightness of the scalpel blade made of diamond can reach 0.01 μm, that is, it is perfect under a microscope of 500-5000 times; Atoms are arranged regularly, which is far smaller than a single cell. Therefore, the blade only divides a single cell into two during the operation, without hurting the adjacent cells and tissues, and will not cause bleeding. The edges of the incision are extrem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F9/007
Inventor 刘晓明
Owner SHENZHEN XINYUNXIANG PRECISION CUTTING TOOLS CO LTD
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