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Crimping die and crimped electrical connection therefrom

  • US 4,991,289 A
  • Filed: 06/23/1989
  • Issued: 02/12/1991
  • Est. Priority Date: 06/23/1989
  • Status: Expired due to Term
First Claim
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1. A method for crimping a terminal member whereby an annular recess is formed, the method comprising the steps of:

  • selecting a pair of die members adapted to cooperate with each other member when positioned in opposing relationship therewith along a crimping axis, said two die members being reciprocally movable relative to each other along said axis during a stroke to apply crimping force to said electrical connection, each of said die members having an essentially hemispheric concave crimping surface with a selected desired radius so that upon completion of the crimping portion of a stroke, a symmetrical essentially cylindrical recess is defined having an axis orthogonal to said crimping axis;

    each of said die members further including a bifurcated plate section extending integrally from said crimping surface, said plate section having major surfaces facing along said recess axis and said plate section including edge surfaces defining a slot having an axis parallel to said cylindrical recess axis and having a bottom defined by said crimping surface, said edge surfaces extending initially tangentially outwardly from sides of said crimping surface, said plate sections of said opposing die members being parallel to each other and offset from each other along said cylindrical recess axis so that portions thereof pass by each other during a said stroke;

    positioning a terminal member having an outer diameter at least larger than the diameter of said cylindrical recess and having a wire inserted therein between said opposing die members and parallel to said cylindrical recess axis; and

    urging said opposing die members together along said crimping axis until said crimping stroke is completed and said crimping surfaces define a crimped electrical connection cylindrical in shape and having a diameter equal to said cylindrical recess diameter;

    wherebyan annular recess is formed in said crimped terminal.

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