ApplicationNo. 06/795699 filed on 10/11/1985
US Classes:219/69.2, Vibrating electrodes or workpiece219/69.14Dielectric composition and purification
ExaminersPrimary: Pellinen, A. D.
Assistant: Evans, Geoffrey S.
Attorney, Agent or Firm
International ClassesB23H 7/26 (20060101)
B23H 9/14 (20060101)
B23H 9/00 (20060101)
Foreign Application Priority Data1984-02-15 JP
AbstractAn electrical discharge boring machine including: a main unit (12) which is moved vertically relative to a workpiece (W); a rotary chuck (14) attached to the lower part of the main unit (12) for holding a hollow bar electrode (16); a guide (36) for slidably guiding the hollow bar electrode (16) near the workpiece (W); a nozzle unit (40) provided on the lower part of the guide for supplying a machining liquid; a rotary joint (28) for introducing the machining liquid into the hollow bar electrode; and a connection (34) for supplying electric power for electrical discharge machining to the hollow bar electrode.