Method of manufacturing a female terminal
View Patent ↗A method for manufacturing a female electrical terminal includes, according to one embodiment, blanking of strip of conductive material and forming a wire connecting portion to receive an electrical wire. The blank may include a contact arm extending into an area adjacent the wire connecting portion. The contact arm extends into this area from a terminal connecting portion at a predetermined angle. The contact arm may be straightened and folded prior to bending the terminal connecting portion into a tubular member for receiving the tab of a male terminal. The step of straightening the contact arm can be performed using a special coining process that applies pressure to the conductive material around the shoulder causing the conductive material to flow within a confined area allowing the contact arm to be straightened.
1. A method for manufacturing a female terminal for receiving a male terminal, the method comprising:
blanking a strip of conductive material to provide a pre-formed terminal cutout having a wire connecting portion at one end, a terminal connecting portion at another end, and a contact arm extending from the terminal connecting portion, at a shoulder, toward the wire connecting portion at an angle permitting the contact arm to reside adjacent the wire connecting portion;
forming the wire connecting portion upwards to form a claw for receiving a core conductor and a sheath of an electrical wire;
straightening the contact arm at the shoulder so that the contact arm's longitudinal axis is generally parallel to the female terminal's longitudinal axis, wherein the claw forming step provides a vacancy for the contact arm to reside after the straightening step;
folding the contact arm at the shoulder along the longitudinal axis of the contact arm toward a front edge of the terminal connecting portion;
bending the terminal connecting portion into a tubular member having opposing side walls and an upper portion opposing a bottom portion defining a terminal insertion opening, the contact arm being folded to cantilever from the upper portion into the tubular member toward the terminal insertion opening forming a resilient spring that contacts the male terminal upon insertion.
2. The method of claim 1 , wherein the straightening step comprises coining the contact arm at the shoulder such that the conductive material flows within a confined area straightening the contact arm.
3. The method of claim 1 , wherein the contact arm is angled approximately 5 to 10 degrees from the female terminal's longitudinal axis.
4. The method of claim 3 , wherein the contact arm is angled approximately 7 degrees from the female terminal's longitudinal axis.
5. The method of claim 1 , wherein the spring force of the contact arm is adjusted by varying the width of the contact arm.
6. A method for manufacturing a female terminal for receiving a male terminal, the method comprising:
blanking a strip of conductive material to provide a pre-formed terminal cutout having a wire connecting portion at one end, a terminal connecting portion at another end, and a contact arm angularly extending from the terminal connecting portion, at a shoulder, toward an area adjacent the wire connecting portion;
forming the wire connecting portion upwards to form a claw for receiving a core conductor and a sheath of an electrical wire;
coining the contact arm at the shoulder so that the contact arm's longitudinal axis is generally parallel to the female terminal's longitudinal axis, wherein forming the wire connecting portion into the claw makes room for the contact arm to be straightened;
folding the contact arm at the shoulder along the longitudinal axis of the contact arm toward a terminal insertion opening of the terminal connecting portion;
bending the terminal connecting portion into a box-shaped member having opposing side walls and an upper portion opposing a bottom portion defining the terminal insertion portion, the contact arm being folded to cantilever from the upper portion into the box-shaped member toward the terminal insertion opening forming a resilient spring that contacts the male terminal upon insertion.
7. The method of claim 6 , wherein the contact arm is angled approximately 5 to 10 degrees from the female terminal's longitudinal axis.
8. The method of claim 7 , wherein the contact arm is angled approximately 7 degrees from the female terminal's longitudinal axis.
9. The method of claim 6 , wherein the spring force of the contact arm is adjusted by varying the width of the contact arm.