Processing method of lens cone inner wall die

Abstract

The invention relates to a processing method of a lens cone inner wall die. The processing method of the lens cone inner wall die comprises that six inclined squeeze blocks which are matched with a six prismoid in a sliding mode through clamping grooves are processed, and a cylindrical insert embryo combination with a supporting platform is spliced by the six inclined squeeze blocks and the six prismoid; the lower portion of the cylindrical insert embryo combination is hooped by a fixture; the cylindrical insert embryo combination is fixed with the fixture; a plurality of copper electrodes which have the same shape with parts of the inner wall of a lens cone are processed by using a three-axis numerical controlled machine; and the plurality of copper electrodes are aimed at the upper portion of the cylindrical insert embryo combination in a one-by-one mode, and the lens cone inner wall die which matched with the inner wall of the lens cone is processed by using electric sparkling discharge. Due to the fact that the copper electrodes are processed through the method of three-axis numerical controlled machine rotary process and then the lens cone inner wall die is processed through an electric sparkling discharge method, compared with a lens cone inner wall die processed by a five-axis numerical controlled machine, the processing method of the lens cone inner wall die has the advantage of being low in cost.

Description

【Technical field】 [0001] The invention belongs to the technical field of mold design and manufacture, and relates to a mold processing method for the inner wall of a lens barrel. 【Background technique】 [0002] The lens of a digital camera can be stretched, and the lens barrel is a mechanism that supports and maintains a set of spherical and aspheric lenses to achieve imaging. Through the adjustment of several moving parts, the rotational movement in the circumferential direction is converted into axial movement to ensure the accuracy of the camera. Focusing, forming an ideal imaging quality, and realizing the telescopic zoom function of the lens barrel, the core parts are the irregular three-dimensional spiral zoom groove set on the inner wall of the lens barrel injection molded part and the sliding boss set on the outer wall of the lens barrel. The sliding boss of the barrel is slidably matched with the other zoom grooves. For the molds that form these irregular three-dime...

AI Technical Summary

Problems solved by technology

[0002] The lens of a digital camera can be stretched, and the lens barrel is a mechanism that supports and maintains a set of spherical and aspheric lenses to achieve imaging. Through the adjustment of several moving parts, the rotational movement in the circumferential direction is converted into axial movement to ensure the accuracy of the camera. Focusing, forming an ideal imaging quality, and realizing the telescopic zoom function of the lens barrel, the core parts are the irregular three-dimensional spiral zoom groove set on the inner wall of the lens barrel injection molded part and the sliding boss set on the outer wall of the lens barrel. The sliding boss of the barrel is slidably matched with the other zoom grooves. For the molds that form these irregular three-dimensional spiral zoom grooves, and the inner wall of the lens barrel also has right-angle sliding grooves, if the three-axis CNC machine tool is used to rotate the processing, Since the diameter of the tool is determined, it is impossible to process a right-angled corner, so it is difficult to complete it with a three-axis CNC machine tool.

It must be processed by five-axis CNC machine tools, and because of the high cost of five-axis CNC machine tools, the cost of lens barrel molds processed by five-axis CNC machine tools is also very high

[0003] And because there is an indented zoom groove on the inner wall of the lens barrel, and the zoom groove is 360° all around, divided into three sections by 120°, and the inner wall of the lens barrel is a cylindrical structure, so the rotating The demoulding cannot be completed, so the internal core-pulling structure needs to be used when demoulding. The traditional method is to use a five-axis CNC machine tool to process the cylindrical mold base into a cylindrical mold with a zoom groove that matches the inner wall of the lens barrel. After the mold base of the convex strip is cut into six slider inserts of different sizes, due to material loss during cutting, it will be difficult to splice the cut inserts into the original combination of cylindrical insert blanks of the same size. Therefore, it is necessary to combine a cylindrical insert blank to cut out three slider inserts that meet the specifications, and then combine another cylindrical insert blank to cut another three slider inserts that meet the size specifications. pieces to ensure that the diameter of the combination of cylindrical inserts formed by the six slider inserts after splicing is the same as the diameter of the combination of cylindrical insert blanks. One of the mold blanks processed by CNC machine tools with the internal texture structure of the lens barrel is wasted, resulting in huge waste and high production costs

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