Flaky graphite electrode machining technique for injection mold

Abstract

The invention provides a flaky graphite electrode machining technique for an injection mold. By adoption of the flaky graphite electrode machining technique for the injection mold, the problems that during numerical-control milling of thin-walled graphite electrodes with reinforcing rib sizes, the upper ports of semi-finished electrodes are prone to brittle breakage frequently, and the sizes are not standard are solved. From the thought angle of systematic techniques, reasonable machining techniques are sought for discussion on the aspects of pretreatment of graphite materials, reasonable selection of tools and machining parameters, reasonable arrangement of numerical-control milling steps, selection of a special high-speed graphite machining machine, compiling of numerical-control programs and the like, a specific machining method and specific technological parameters are given, and a beneficial reference is provided for mold enterprises for graphite electrode machining; and automatic production can be achieved, production cost of similar electrodes is reduced effectively, and working efficiency is improved.

Description

technical field [0001] The invention relates to a processing method for a thin-sheet graphite electrode of an injection mold. Background technique [0002] As an EDM electrode material, graphite has been widely used in the mold industry due to its advantages of high machinability, light weight, fast forming, extremely small expansion rate, small loss, and easy trimming; , especially like figure 1 The size of the upper end shown is 1.2mm, the root size is 1.5mm, and the height is 30-40mm. When thin-walled graphite electrodes with the size of ribs commonly used in products are CNC milled, the semi-finished electrodes often have the following problems: 1) The top of the graphite electrode The top surface of thin-walled ribs is easy to break; 2) The size of the upper end is 1.2mm, and it is difficult to process in place; the above problems are usually dealt with in actual production, such as using fine sand to correct them, which is simple, rough, and time-consuming Therefore,...

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Problems solved by technology

[0002] As an EDM electrode material, graphite has been widely used in the mold industry due to its advantages of high machinability, light weight, fast forming, extremely small expansion rate, small loss, and easy trimming; , especially like figure 1 The size of the upper end shown is 1.2mm, the root size is 1.5mm, and the height is 30-40mm. When thin-walled graphite electrodes with the size of ribs commonly used in products are CNC milled, the semi-finished electrodes often have the following problems: 1) The top of the graphite electrode The top surface of thin-walled ribs is easy to break; 2) The size of the upper end is 1.2mm, and it is difficult to process in place; the above problems are usually dealt with in actual production, such as using fine sand to correct them, which is simple, rough, and time-consuming Therefore, it is necessary to find a reasonable processing method from the perspective of systematic process methods to improve the processing yield of electrodes and improve production efficiency.

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