Processing of Lathe Chuck Clamping Plate by Electrical Discharge Machining
Electrical discharge machining, which is abbreviated as EDM, is a machining process to remove metal by melting or burning with electric sparks generated between the workpiece and a tool electrode. This process is suitable for the processing of hard materials and those that are difficult to cut by other processing methods, such as lathe chuck clamping plate. EDM processing technology is simple and versatile, suitable for precision machining and complex shapes that are difficult to be machined by conventional machining technology, especially when processing difficult-to-cut materials, extra-hard materials and porous materials, as well as small parts or fine holes.
The EDM processing of the lathe chuck clamping plate is similar to other processing in the general precision design. The EDM processing adopts a fixture for positioning and clamping, which meets the positioning accuracy and rigidity requirements of the finished product. In the EDM process, a single electrode can be used, and when necessary, a series of electrodes can be used for EDM. It can be used for machining in different directions, which is suitable for complex parts and forming surfaces.
In EDM processing, the accuracy of EDM machining is determined by the position accuracy of the machining fixture, which is computed as follows. The accuracy of the chuck clamping plate machining is determined by the accuracy of the machining fixture, which is calculated as (L-W)/2, where L is the size of the fixture, and W is the positioning accuracy requirements of the finished product.
In the EDM processing of the lathe chuck clamping plate, the tool selection should be reasonable. Generally, copper or copper alloy with good electrical and thermal conductivity is used as the tool material. Since the tool electrode contains a thin surface layer of copper oxide, which has a poor electrical conductivity, it should be regularly replaced to ensure reliable EDM connections are made. Generally, the tool electrode should be aged when used. Before the aging process, the surface of the tool must be polished smooth, so as to facilitate the discharge. The aging temperature of the tool electrode is generally 120 to 150 degrees Celsius, and the aging time is about ⅓ of the EDM processing time.
In the EDM processing process, the processing direction and anti-processing direction should be carefully considered. When processing in thin plates, it is necessary to use a composite jerk cutting method to reduce the cutting width and the wavy of the cutting edge, that is, cutting of the electrode in one direction and cutting in the opposite direction. In the model operation of the EDM, the allowable machining parameters such as processing current, pulse interval and spark gap should be set according to different processes.
The EDM process of the lathe chuck clamping plate basically adopts the post-processing of spark erosion. Since the effect of the spark erosion process on the surface finish is unsatisfactory, after the spark erosion, it is necessary to use sandblasting processing to ensure the surface finish requirements. After processing, it is necessary to observe the surface quality of the processed parts, etc., to confirm that the machined surface meets the design requirements, and the electrodes used must be fully inspected to ensure that the processing accuracy and surface quality are preferred.
Finally, the above is a brief introduction to the EDM processing technology of the lathe chuck clamping plate. Through this processing method, it can process some materials or parts that are difficult to process through conventional machining technology, and improve the accuracy and speed of parts machining, and make up for the defect of small part or large rim machining. EDM processing technology is widely used in the processing of automobile industry, aviation industry, manufacturing industry, etc.
