Method for precision mold temperature control and property control and precision mold

Abstract

The invention discloses a method for precision mold temperature control and property control and a precision mold. The method for precision mold temperature control and property control comprises thefollowing steps that (1) according to the fact that an optical part has a structure on one face or structures on two faces, a nickel phosphide Ni-P coating is prepared on the working face of an uppermold and / or a lower mold; 2) an optical part microstructure is machined on the nickel phosphide Ni-P coating; 3) a fluid channel is formed in the upper mold and / or the lower mold with the optical partmicrostructure, where the fluid channel is used for introducing cooling liquid; and 4) the circulating cooling liquid is introduced into the fluid channel, and the temperature of the upper mold and / or the lower mold is controlled to be lower than 350 DEG C. According to the method, precipitation of nickel crystals can be controlled by reducing the temperature during mold forming machining so as to maintain the forming precision of a mold, and then the service life of the mold is prolonged.

Description

technical field [0001] The invention relates to the field of processing and forming molds for optical parts, in particular to a method for temperature control of precision molds and precision molds thereof. Background technique [0002] The ultra-precision manufacturing of molds is the primary basis for realizing the precision forming technology of optical components. Nickel phosphide Ni-P material, hardness can reach 500-600HV, good high-temperature service performance, and good cutting performance, through single-point diamond cutting technology, the surface roughness can be better than 10nm, and the shape error is better than 0.3 The optical surface of μm is an ideal material for forming molds. The forming process of optical parts needs to heat the material and the mold together above the transformation temperature of the optical material, control the forming pressure to copy the shape of the mold surface to the material surface, and then cool down to take out the optica...

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Problems solved by technology

[0003] However, after the existing precision molds for optical parts are used for a period of time, the precision of the formed optical parts will decrease, and the mold needs to be replaced or repaired. Therefore, the existing precision molds for optical parts have a long service life. Shorter problem; Chinese patent application publication number CN 105385999 A discloses a method for prolonging the cycle life of lens mold steel, by depositing diamond-like carbon on the surface of the mold steel, and improving the SP through process improvement 3 The content of the bond can significantly improve its hardness and other properties and prolong its service life. That is to say, the patent document improves the performance of the die steel by improving the material properties of the die surface to increase the service life. However, it avoids the mold The problem of steel wear does not involve how to improve the forming accuracy of optical parts, and does not disclose how to improve the service life of the mold from the aspect of forming accuracy

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