| 摘要 |
An improved EDM method and apparatus in which a hydrocarbon liquid such as kerosene is decomposed, outside of an EDM gap, to produce therefrom gases containing gaseous hydrocarbons, which gases are injected into the machining gap immersed in a deionized water liquid coolant. The liquid hydrocarbon is so decomposed, e.g. thermally, as to yield these gases which contain 30 to 85% hydrogen and the balance essentially the gaseous hydrocarbons. The thermal decomposition uses heating the liquid hydrocarbon at a temperature not in excess of 300 DEG C. The liquid hydrocarbon decomposition gases may be entrained in a stream of a deionized water for delivery into the EDM gap whose region is immersed in a continuous volume of the deionized water. The decomposition of the liquid hydrocarbon may be carried out in a separate thermal decomposition system connected to the machining gap via a continuous conduit communicating a source of the liquid hydrocarbon with the machining gap.
|
