Rotary indexing device for electrical discharge machining of three-edged needle

The invention belongs to the technical field of three-edged needle production and machining, and discloses a three-edged needle electric discharge machining rotary dividing device which comprises a fixing base, a fixing shaft connected to the upper end of the fixing base, a rotary workbench and a rotary motor driving the rotary workbench to rotate along the central axis of the fixing shaft. And at least two needle body clamping mechanisms which are distributed circumferentially are arranged on the rotary worktable. The needle clamping device is horizontally and rotationally connected to the rotary workbench, along with rotation of the rotary workbench, the indexing gear connected to the needle clamping device is meshed with the fixed sector gear, the needle clamping device is driven to accurately rotate by 120 degrees, accordingly, rotary indexing work is completed, batch indexing can be achieved every time, and the production efficiency is effectively improved. 本发明属于三棱针生产加工技术领域，公开了一种三棱针放电加工旋转分度装置，包括固定座、连接于固定