Machining method for profiled hole of handle type workpiece

Abstract

The invention relates to a machining method for a profiled hole of a handle type workpiece, and belongs to the technical field of mechanical manufacturing. Electric spark machining is a machining method based on pulse discharge between tool electrode and workpiece electrode, taking the electric corrosion phenomenon as a means, using the electric heat energy to remove metal and enable the workpieceinto shape. During electric spark machining, when the tool electrode approaches tool electrode of the workpiece under control of an automatic control system and reaches a certain distance with the workpiece electrode, liquid medium between electrodes is broken down by a pulse power supply and pulse discharge occurs, thus the workpiece is eroded out of small pits, electric corrosion products are discharged from the liquid medium to the exterior of a discharge gap, meanwhile insulation is restored between the electrodes after a short interval, and by repeating the process over and over again, the workpiece can be machined with a shaped hole in the shape of the tool electrode. According to the machining method for the profiled hole of the handle type workpiece, fast and accurate machining for the profiled hole of the handle type workpiece can be realized, and the requirements of the inner cavity shape and degree of symmetry are met.

Description

technical field [0001] The invention relates to a processing method for a special-shaped hole in a handle workpiece, which belongs to the technical field of mechanical manufacturing. Background technique [0002] In many products, there is a similar handle workpiece, which is matched with the shaft, and the fixed fit between the two plays an important role in the opening and closing of the product. This type of handle has relatively high requirements for special-shaped holes, and generally has a requirement for symmetry, and the symmetry is not greater than 0.1mm. Usually the processing scheme of the handle parts is: first turn and mill the shape, drill the rough hole in the inner cavity, push and expand the inner cavity, and the fitter repairs the file to the special-shaped hole. [0003] At present, the processing methods of special-shaped holes are mainly rough machining by turning, milling and drilling, semi-finishing by push and expand fitter, and finishing by fitter t...

AI Technical Summary

Problems solved by technology

This processing method is inefficient, requires high skill of the operator, and it is difficult to guarantee the shape and symmetry of the inner cavity of the part.

Images