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Method and apparatus for eliminating free clearances in a press shutheight adjustment mechanism

  • US 6,715,409 B2
  • Filed: 05/22/2002
  • Issued: 04/06/2004
  • Est. Priority Date: 05/22/2002
  • Status: Active Grant
First Claim
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1. A press machine, comprising:

  • a frame structure with a crown and a bed;

    a slide guided by said frame structure for operative reciprocating movement in opposed relation to said bed;

    a drive assembly attached to said frame structure for operatively reciprocating said slide;

    a bolster assembly mounted to said bed;

    a shutheight adjustment mechanism configured within said press machine and arranged to controllably adjust the press shutheight between said slide and said bed;

    said shutheight adjustment mechanism comprising a male threaded member threadedly engaging a female threaded member, wherein at least one of said threaded members being rotatable relative to the other of said threaded members to change the press shutheight, said shutheight adjustment mechanism operatively including at least one clearance space defined between respective threaded portions of said male threaded member and said female threaded member; and

    means for inducing a deformation activity in at least one of said male threaded member and said female threaded member sufficient to effectuate a substantial interlocking engagement between, at least in part, the respective threaded portions of said male threaded member and said female threaded member, wherein said deformation inducement means includes a hydraulic assembly arranged to compress said female threaded member by applying pressurized fluid along a periphery thereof and/or expand said male threaded member by hydraulically pressurizing an interior space thereof.

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