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Inner-cooling lengthened spade drill with tool bit replaceable

Liu LI'Na ; Cao Xiaohui ; Zhao Hongliang ; Zou Weiguang ; Sun Fusheng ; Sun Jin 29 October 2014

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  • Title:
    Inner-cooling lengthened spade drill with tool bit replaceable
  • Author: Liu LI'Na ; Cao Xiaohui ; Zhao Hongliang ; Zou Weiguang ; Sun Fusheng ; Sun Jin
  • Subjects: Performing Operations ; Transporting ; Machine Tools ; Metal-Working Not Otherwise Provided FOR ; Turning ; Boring ; Medicine ; Sciences ; Chemistry
  • Description: The utility model relates to an inner-cooling lengthened spade drill with a tool bit replaceable. The inner-cooling lengthened spade drill with the tool bit replaceable comprises a spade drill tool bar and a spade drill blade. The spade drill blade is connected with the spade drill tool bar through a specific screw in a fastening mode, an inner-cooling hole is machined in the center of the spade drill tool bar, two chip removal straight grooves are symmetrically formed in the surface of the spade drill tool bar in the opening direction by 120 degrees, and two end inner-cooling holes are further symmetrically machined in the cutting end of the spade drill tool bar and allow cooling liquid to be discharged in time to promote the drill bit to be cooled in time. The problem that inner-cooling holes of a lengthened spade drill rod are difficult to machine is solved; compared with a traditional method that a deep hole drill is used for machining deep holes, the advanced process method that the holes are drilled in a segmented mode and then welded and the holes are made through after welding is carried out is adopted, because of the machining method, machining cost is reduced, the spade drill is not restricted by machining conditions, and common devices and common twist drills can be used for machining; machining procedures are reduced, machining duration is shortened, machining cost is lowered, and economic benefits are increased.
  • Creation Date: 29 October 2014
  • Language: English
  • Source: Espacenet (European Patent Office)

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