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Safety operating procedures for special processing machine tools

Special processing machine tools that are widely used in production mainly include EDM machine tools and wire EDM machine tools. Therefore, here we mainly elaborate on the safe operating procedures of these two special processing machine tools.

1. Safety operating procedures for EDM machine tools

 

(1) Before starting the machine, read the instruction manual of the machine tool carefully. Do not machine the machine tool at will before you are familiar with the operation of the machine tool to avoid safety accidents.

 

(2) Pay attention to check the discharge gap before processing, that is, a certain distance must be maintained between tools connected to different polarities and the workpiece to form a discharge gap. Generally it is about 0.01~0.1mm.

 

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

 

(4) Ensure that the voltage pulse waveform output by the pulse power supply applied to the workpiece and tool electrode 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) Discharge must be carried out in a liquid medium with certain insulating properties.

 

(7) During operation, pay attention to checking the filter element of the working fluid system filter. If it is clogged, replace it in time to ensure that the working fluid can automatically maintain a certain degree of cleanliness.

 

(8) For flammable working fluids, pay attention to fire prevention during use.

 

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

 

2. Safety operating procedures for wire EDM machine tools

Since wire EDM is developed on the basis of EDM, it uses linear electrodes (molybdenum wire or copper wire) to cut the workpiece through spark discharge. Therefore, the safety operating procedures for wire EDM machine tools are mostly the same as those for EDM forming machine tools. In addition, please pay attention to the following during operation:

 

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

 

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

 

(3) During electrical discharge machining, the working fluid must fully surround the electrode wire to prevent wire breakage due to the heat generated when the electrode wire passes through a large pulse current.

 

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

 

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

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