Apparatus for crimping electrical terminals

• US 5,671,528 A
• Filed: 02/09/1996
• Issued: 09/30/1997
• Est. Priority Date: 02/17/1995
• Status: Expired due to Term

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Endo, Takayoshi, Hatagishi, Yuji
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): COLEY, ADRIAN
• Application Number:
  US08/598,805
• Time in Patent Office: 599 Days
• Field of Search: 29/753, 29/761, 29/748, 29/33 M, 29/863, 72/413
• US Class Current: 29/753
• CPC Class Codes: H01R 43/058 Crimping mandrels
• CPC Class Codes: Y10S 72/712 Electrical terminal crimper
• CPC Class Codes: Y10T 29/49185 of terminal
• CPC Class Codes: Y10T 29/5193 Electrical connector or terminal
• CPC Class Codes: Y10T 29/53235 Means to fasten by deformation
• CPC Class Codes: Y10T 29/5327 Means to fasten by deforming

Abstract

An anvil (5) has a receiving surface (20) to receive an electrical terminal (4) and a punching hole (6) penetrating through the anvil (5) with an opening in the receiving surface (20). A crimper (2) has a curved surface to crimp the terminal (4). An auxiliary punch (8) has a protrusion (7) that can pass through the punching hole (6) to extend from the opening in the receiving surface (20). A wire core portion (25) is crimped to the electrical terminal (4) between the crimper (2) and the anvil (5). Then, the auxiliary punch (8) strikes out a crimped portion (21) to form a concave portion (27) in the state that the crimped portion (21) is compressed by the crimper (2) and the anvil (5).

Claims

1. A terminal crimping apparatus for crimping a conductive barrel of an electrical terminal to a stripped wire composed of a plurality of cores comprising:

an anvil having a receiving surface to receive the terminal and a punching hole penetrating through said anvil with an opening in the receiving surface;

a crimper having a curved surface to crimp the terminal;

wherein said crimping is performed between said crimper and said anvil;

an auxiliary punch having a protrusion that can pass through said punching hole to extend from the opening in the receiving surface, wherein said protrusion has a sectional area radially smaller than a base block of said auxiliary punch, and said base block has a sectional area larger than said punching hole to prevent said base block from entering said punching hole.

2. A terminal crimping apparatus as claimed in claim 1, further comprising a press that upwardly moves said auxiliary punch.

3. A terminal crimping apparatus as claimed in claim 2, wherein said auxiliary punch is upwardly biased by a coil spring.

4. A terminal crimping apparatus as claimed in claim 1, wherein said protrusion of said auxiliary punch is a crest-shaped protrusion.

5. A terminal crimping apparatus as claimed in claim 4, wherein said protrusion has a foremost end with a flat surface.