Automatic dust collection device for machining

The automatic dust collection device comprises a machining box, a fixing shell is fixedly arranged on the back face of the machining box, an air pump is installed on the inner top wall of the fixing shell, a collection box is placed in the fixing shell, and a material guide partition plate is rotationally connected to the front inner wall of the machining box. According to the machining box for crystal polishing, the flow dividing cover is arranged in the machining box for crystal polishing, air can be discharged downwards through the air outlet holes in the surface of the flow dividing cover in the polishing and polishing process of crystals, and dust generated by polishing is blown downwards to the surface of the material guiding partition plate; polishing liquid sprayed in the machining process is filtered through a screening and filtering net on the surface of a material guiding partition plate, the filtered polishing liquid enters the portion, below the material guiding partition plate, of the machining