Model kernel making process
A manufacturing method and mold core technology, applied in the field of mold core manufacturing, can solve the problems of residual stress, long processing cycle, difficult precision requirements, etc., and achieve the effects of reducing surface stress, shortening processing cycle, and high degree of automation
Inactive Publication Date: 2008-02-20
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
Therefore, the processing of mold cores forming digital camera lenses must also achieve the same or even better accuracy. However, mold cores forming aspheric lenses generally only have one symmetry axis, and cannot be processed by the grinding method during spherical processing; The radius of curvature of each point is different, so it is not easy to correct
Therefore, for products that require high precision and irregular surfaces, such as mold cores of camera lenses, if processed by traditional machining methods, not only the processing cycle is long, the precision is not high, but also there is residual stress
And for micro-products such as optical lens mold cores that require high precision, it is difficult to achieve the corresponding precision requirements through correction through mechanical processing methods
Method used
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[0008] Referring to FIG. 1 , the electron beam processing machine 100 used in the mold core manufacturing method of the present invention includes a vacuum chamber 1 , an electron beam generator 10 and a focusing acceleration device 20 .
[0009] The left side wall of the vacuum chamber 1 is provided with an air inlet pipe 11, which can be introduced into an inert gas, such as argon, and the right side wall is provided with a gas outlet pipe 12, and the bottom is provided with two clamps 31 for fixing the raw material of the mold core. This embodiment is a camera The mold core of lens lens 30.
[0010] The mold core 30 can be made of tungsten carbide. Tungsten carbide has high hardness and high melting, high mechanical impact resistance, small thermal expansion coefficient, high temperature is not easy to react with optical glass, good processing performance, easy to process into high precision and high surface finish. Surface and other advantages.
[0011] The electron beam ...
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Abstract
The model kernel making process is to use electronic beam the electronic beam generator produces in machining model kernel. In vacuum or inert gas atmosphere and under the control of computer, electronic gun is driven to machine model kernel. Compared with available mechanical method, the said making method has greatly reduce surface stress, fine machined surface, high automation degree and shortened making period.
Description
【Technical field】 [0001] The invention relates to a manufacturing method of a mold core, in particular to a manufacturing method of a lens mold core. 【Background technique】 [0002] As a high-precision optical product, camera lenses, especially digital camera lenses used in portable electronic devices such as mobile phones, require lightness, thinness, precision, and durability. The thickness of an aspheric lens required by a general digital camera lens is about 1 mm, and the radius It is about 20 mm, and the surface processing accuracy is required to reach 1 micron. Therefore, the processing of mold cores forming digital camera lenses must also achieve the same or even better accuracy. However, mold cores forming aspheric lenses generally only have one symmetry axis, and cannot be processed by the grinding method during spherical processing; The radius of curvature of each point is different, so it is not easy to correct. Therefore, for products that require high precisio...
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IPC IPC(8): B23P15/24B23H9/02
Inventor 陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD