What is the discharge gap of wire cutting? [Zhikai CNC]
Wire EDM is a commonly used metal cutting process that uses the high temperature and high energy generated by electric spark discharge to cut metal materials into the desired shape. The discharge gap of wire EDM is one of the important parameters that affect the cutting effect and quality.
1. Principle
Wire EDM is a non-contact cutting process that uses the thermal effect of electric spark discharge to cut metal materials into the desired shape. The principle is to generate high-energy electric spark discharge through the discharge gap between the molybdenum wire and the workpiece, so that the metal material is partially melted and evaporated, thereby achieving the purpose of cutting.
The discharge gap of wire EDM refers to the distance between the molybdenum wire and the workpiece, and is also one of the important parameters of electric spark discharge. The size of the discharge gap directly affects the size and distribution of the discharge energy, and then affects the cutting speed, cutting quality and molybdenum wire wear.
2. Influencing factors
1. Material thickness and properties
The selection of the discharge gap requires comprehensive consideration of multiple factors. The first is the thickness and properties of the material. Generally speaking, the thicker the material, the larger the discharge gap needs to be to ensure that the discharge energy can be fully transferred to the inside of the material. The properties of the material will also affect the selection of the discharge gap. For example, a material with a higher hardness requires a larger discharge gap.
2. Requirements for cutting speed and cutting quality
The second is the requirements of cutting speed and cutting quality. The size of the discharge gap will directly affect the cutting speed and cutting quality. Generally speaking, the larger the discharge gap, the faster the cutting speed, but the cutting quality may decrease. The smaller the discharge gap, the better the cutting quality, but the cutting speed may decrease. Therefore, it is necessary to select a suitable discharge gap according to the specific cutting requirements.
3. Molybdenum wire wear and discharge stability
In addition, factors such as molybdenum wire wear and discharge stability need to be considered. The size of the discharge gap will directly affect the wear of the molybdenum wire. The larger the discharge gap, the faster the molybdenum wire wears. The stability of the discharge gap will also affect the stability of the cutting quality. The smaller the discharge gap, the better the discharge stability. Suzhou Zhikai CNC Technology Co., Ltd.'s independently developed high-frequency pulse power supply has low molybdenum wire loss. When the machine tool is in normal condition, it can effectively cut 200,000-300,000 square wires (18-17 wires).
In summary, the discharge gap of EDM wire cutting is one of the important parameters that affect the cutting effect and quality. When selecting the discharge gap, it is necessary to comprehensively consider factors such as the thickness and properties of the material, the requirements for cutting speed and quality, molybdenum wire wear and discharge stability to achieve the best cutting effect and quality.
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