NARROW HOLE ELECTRIC DISCHARGE MACHINE

• Main Author: FUJITA KUNIO
• Format: Patent
• Language: English; Japanese
• Published: 06.04.2017
• Subjects: MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL; TRANSPORTING; WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL

PROBLEM TO BE SOLVED: To provide a narrow hole electric discharge machine that allows a small-size pipe electrode to be easily inserted through a seal member to be attached to an electrode holder without damaging the electrode.SOLUTION: The narrow hole electric discharge machine, which discharges electricity between a pipe electrode and a work-piece to process a narrow hole in the work-piece while distributing processing liquid into the pipe electrode, comprises: an electrode holder 10 that moves the pipe electrode as a whole with a feeding shaft relatively to the work-piece; a through-hole 26 through which is passed a pipe electrode 30; and a taper part 24 which engages with the electrode holder 30. The taper part 24 is provided with a seal member 20 having a slit 24a and a nut 18 that presses the seal member 20 together with a collet 16 that grasps the pipe electrode 30.SELECTED DRAWING: Figure 2 【課題】小径のパイプ電極を損傷することなく、容易にシール部材に挿通して電極ホルダに取り付け可能な細穴放電加工機を提供すること。【解決手段】パイプ電極中に加工液を流通させながら、該パイプ電極とワークとの間で放電させ、ワークに細穴を加工する細穴放電加工機が、送り軸で全体パイプ電極をワークに対して相対移動させる電極ホルダ１０と、パイプ電極３０を通す貫通穴２６と、電極ホルダ３０と係合するテーパ部２４とを有し、該テーパ部２４にスリット２４ａを形成したシール部材２０と、パイプ電極３０を把持するコレット１６とともにシール部材２０を押圧するナット１８とを具備する。【選択図】図２