Special processing machines that are widely used in production mainly include EDM machines and EDM machines. Therefore, the safety operation procedures of these two special processing machines are mainly explained here.

1. Safety operation procedures for EDM machine tools

(1) Before starting the machine, carefully read the instruction manual of the machine tool. Before you are familiar with the machine tool operation, do not move the machine tool at random to avoid a safety accident.

(2) Check the discharge gap before processing, that is, the tool and the workpiece connected to different polarities must be kept at a certain distance to form a discharge gap. Generally, it is about 0.01 to 0.1 mm.

(3) The clamping and correction of the tool electrode must ensure that the tool electrode feed machining direction is perpendicular to the table plane.

(4) It is guaranteed that the voltage pulse waveform of the pulse power supply output on the workpiece and the tool electrode applied in the liquid medium is unidirectional.

(5) There must be sufficient pulse discharge energy to ensure that the metal at the discharge site is melted or vaporized.

(6) The discharge must be carried out in a liquid medium having a certain insulating property.

(7) Pay attention to check the filter element of the working fluid system filter during operation. If there is any blockage, replace it in time to ensure that the working fluid can maintain a certain degree of cleanliness automatically.

(8) For the use of flammable type of working fluid, pay attention to fire prevention during use.

(9) To achieve civilized production, after the processing operation is finished, the work site must be cleaned, the machine tool cleaned, and the system power supply must be cut off before leaving.

2. Safety operation rules for WEDM machine tools

Since the wire EDM is developed on the basis of EDM, it uses a wire electrode (molybdenum wire or copper wire) to cut the workpiece by spark discharge. Therefore, the safe operating procedures of the WEDM machine are mostly the same as those of the EDM machine. In addition, the operation should also pay attention to:

(1) When winding, ensure that the wire has a certain pre-tightening force to reduce the vibration amplitude of the wire electrode during processing and improve the machining accuracy.

(2) Check the working fluid system with a deionized resin cartridge to ensure that the working fluid can automatically maintain a certain resistivity.

(3) At the time of electric discharge machining, it is necessary to sufficiently surround the electrode wire with the working fluid to prevent the wire from being broken due to heat generated when the wire is passed through a large pulse current.

(4) Strengthen the daily inspection, protection and lubrication of the mechanical devices of the machine tools.

(5) To achieve civilized production, after the processing operation is finished, the work site must be cleaned, the machine tool cleaned, and the system power supply must be cut off before leaving.

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