Method for joining a shield terminal to a shielded cable

• US 6,643,926 B2
• Filed: 05/16/2001
• Issued: 11/11/2003
• Est. Priority Date: 08/25/1998
• Status: Expired due to Term

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Sakaguchi, Tadahisa, Kuwayama, Yasumichi
• Primary Examiner(s): Vo, Peter
• Assistant Examiner(s): NGUYEN, DONGHAI D
• Application Number:
  US09/855,728
• Publication Number:
  US 20010020540A1
• Time in Patent Office: 909 Days
• Field of Search: 298/60, 298/61, 298/62, 298/63, 298/64, 298/65, 298/66, 298/67, 228/11.1, 228/115, 228/110.1, 228/234.1, 219/56, 219/56.1, 219/56.22, 219/91.2, 219/85.1
• US Class Current: 29/863
• CPC Class Codes: H01R 4/024 comprising preapplied solder
• CPC Class Codes: H01R 4/18 by crimping H01R4/01, H01R4/2495 take precedence; for coaxial cables H01R9/0518
• CPC Class Codes: H01R 43/0207 Ultrasonic-, H.F.-, cold- or impact welding
• CPC Class Codes: H01R 43/0228 without preliminary removing of insulation before soldering or welding
• CPC Class Codes: H01R 43/048 Crimping apparatus or processes H01R43/042 takes precedence
• CPC Class Codes: Y10T 29/49185 of terminal
• CPC Class Codes: Y10T 29/4919 Through insulation

Abstract

In a shield terminal joining structure for joining a shield terminal to a prescribed grounding position along a shielded cable that is formed by an inner core wire made of a conductor, an inner insulation covering that covers the inner core wire, a braid that is provided around the outside periphery of the inner insulation covering, an outer insulation covering that covers the braid, resistive welding is performed while crimping parts of the shield terminal to the outer covering of the shielded cable at the grounding position, so as to melt away part of the outer insulation covering, enabling a weld to be made between the crimping parts and the braid of the shielded cable.

Claims

1. A method for joining a shield terminal to a prescribed position on a shielded cable, the method comprising the steps of:

providing the shielded cable having an inner core wire made of a conductor, an inner insulation covering that covers the inner core wire, a braid that is provided around an outside periphery of the inner insulation covering, and an outer insulation covering that covers the braid;

setting a crimping part of the shield terminal over the outer insulation covering at a grounding position at an end of the shielded cable;

causing a pre-heating current to flow between a pair of electrode tips while pressure is applied between the electrode trips so as to crimp the crimping part, thereby softening the outer insulation covering and removing the outer insulation covering by means of the applied pressure; and

causing a welding current to flow between the pair of electrode tips, so as to achieve a weld between the crimping part of the shield terminal and the braid, wherein the welding current is different from the pre-heating current and the welding and pre-heating currents do not flow to the inner core wire.

2. A method for joining a shield terminal to a prescribed position on a shielded cable, the method comprising:

providing the shielded cable having an inner core wire made of a conductor, an inner insulation covering that covers the inner core wire, a braid that is provided around an outside periphery of the inner insulation covering, and an outer insulation covering that covers the braid;

setting a crimping part of the shield terminal over the outer insulation covering of the shielded cable at the prescribed position on the shielded cable;

applying pressure to the crimping part by a pair of electrode tips to crimp the crimping part;

causing a pre-heating current to flow between the pair of electrode tips while applying pressure to the crimping parts, thereby removing the outer insulation covering by means of the applied pressure; and

causing a welding current to flow between the pair of electrode tips to weld the crimping part of the shield terminal to the braid, wherein the welding current is different from the pre-heating current and the welding and pre-heating currents do not flow to the inner core wire.

3. The method according to claim 2, wherein the prescribed position is a grounding position along the shielded cable, and setting the crimping part includes setting the crimping part at the grounding position.

4. The method according to claim 2, wherein the prescribed position is an intermediate position along the shielded cable, and setting the crimping part includes setting the crimping part at the intermediate position.

5. The method according to claim 2, wherein the crimping part has an inner surface and a low-melting-point substance applied to the inner surface, and the method comprises melting the low-melting-point substance thereby further increasing the weld between the crimping part and the braid.