JPH0439880A - Manufacturing of terminal - Google Patents

Abstract

PURPOSE:To efficiently form a high-quality plating terminal by forming a terminal with the secondary processing of bending etc. applied after a plate-like primary processing hoop material is formed and a roll-like primary processing hoop material is sent in order to be plating-treated. CONSTITUTION:A press processing feed hole 4 and a broken-out section contact part 5, in which a punched broken-out section becomes the blade surface 11 of a U-shaped slot pressure contact blade 8 after forming to be made as an electric contact, are punched to form a plate-like primary processing hoop material 3 leaving the other punched part 7. Then the primary processing hoop material 3 is again made the roll of a plate material to be sent to a plating layer in order to be plating-treated, then is carried in order to secondary processing pressing utilizing the feed hole 4, and the punching and the bending for the other remaining punched part 7 are applied to form a pressure contact terminal 1 with plating having a required shape. This efficiently forms a terminal having high quality plating.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for manufacturing a terminal that is attached to an electric wire or the like and used for electrical continuity.

``Prior Art'' In order to improve the performance of electrical contact parts, terminals are usually plated on the surface of a metal plate, and plated terminals are formed using the following two methods.

Specifically, one of them is a pre-plating method in which a plate material that has been plated in advance is pressed and formed into a terminal of a desired shape;
Another method is a post-plating method in which a plate material that is not plated is press-worked to form a terminal in a desired shape, and then the formed terminal is plated.

``Problems to be Solved by the Invention'' However, the former pre-plating method of one or more conventional molding methods is, for example, in the case of the pressure contact terminal 1 shown in FIG.

Since the blade surface 11 of the pressure welding blade 8 of the U-shaped slot, which is the point of contact with the electric wire conductor, comes into contact with the fractured surface during press punching, a plating condition exists. In addition, in the latter post-plating method, the conical contact portion 9 that fits with the mating female terminal is made of a flat plate material.
Since the terminal is formed by 80° close bending, the plating liquid penetrates into the inside of the close contact by capillary action, and the plating liquid that adheres to the inside causes deterioration of the terminal over time. Since the terminals are plated, it is difficult to make the plating thickness uniform, and furthermore, there are problems such as deformation of the terminal shape.

The present invention provides a method for manufacturing a terminal that overcomes the drawbacks of the conventional means described above.

"Means for Solving the Problems" The molding method of the present invention that solves the above technical problems is as follows: "In molding a plated terminal of a desired shape, a flat hoop material is progressively fed to form a "pressing hole". A flat plate-shaped primary processed hoop material is formed by punching out at least [the fractured surface contact area where the punched fractured surface forms an electrical contact after terminal forming], and the roll-shaped primary processed hoop material is progressively fed and subjected to plating treatment. death.

After that, secondary processing such as bending is performed to form the terminal.

"Function" According to the manufacturing method of the present invention described above, at least the "broken surface contact area where the punched broken surface forms an electrical contact after forming the terminal" is plated on a previously punched flat plate-shaped primary hoop material. This eliminates the presence of plating at the fracture surface contact area and the unnecessary penetration and adhesion of the plating solution.

Since the plating process is carried out by progressively feeding the primary processed hoop material of the rolled flat plate, the plating film thickness is uniform and there is no risk of deformation. This enables efficient progressive feeding by utilizing the "press feed holes" formed in advance during the primary processing.

"Example" Hereinafter, a detailed explanation will be given with reference to an example. First, referring to FIG. 1 showing an example applied to the molding of a press-contact terminal 1, a flat hoop material 6 as a molding base material is progressively fed to form a press-forming feed hole 4 and a punched fracture surface after molding. The fracture surface contact area 5 which becomes the blade surface 11 of the U-shaped slot pressure contact blade 8 and becomes an electrical contact is punched out, and the primary processed hoop material 3 of the flat plate is formed by leaving the other punched area 7 indicated by the dotted line in the figure. . Then, this primary processed hoop material 3 is made into a roll of flat material again, and is fed progressively to the plating layer for plating treatment, and then progressively fed to the secondary nibless using the feed hole 4, and the remaining material is The other punched parts 7 are punched and bent.

A plated pressure contact terminal 1 having a desired shape is molded.

Next, FIG. 2 shows another embodiment applied to the molding of crimp terminals 2, and the primary processed hoop material 3 of this embodiment also has a feed hole 4 for press working and a punched fractured surface after molding. A fracture surface contact portion 5 that will become an electrical contact of the glue receptacle-shaped contact portion 10 is punched out, and a flat primary hoop material 3 is formed, leaving the other punched portion 7 indicated by the dotted line in the figure. Then, the primary processed hoop material 3 is plated using the same procedure and method as in the embodiment shown in FIG. 1, and is then subjected to secondary processing to form a plated crimp terminal 2 having a desired shape.

Both the embodiments in FIGS. 1 and 2 have the above-mentioned effect, and since the fracture surface contact area 5, which is a functionally important point, is plated after punching in the primary process, a plated layer of the required thickness exists. During the plating process, there are no overlapping parts of the plate material where the plating solution can easily penetrate and remain, and since the plating process is carried out by progressive flat plate feeding, the plating film thickness is uniform and the harmful plating solution is removed. Non-delivery remaining is eliminated.

The plating process and secondary processing after the plating process are
By utilizing the feed holes 4 for press processing formed by the primary processing, the flat plate roll material can be progressively fed and processing can be carried out efficiently.

In addition, in the above structure of the present invention, the primary processing hoop material 3 may be subjected to shape cutting of the terminal except for one bending process in addition to the above-mentioned feed hole 4 and fracture surface contact area 5, and in short, the primary processing It is sufficient if the hoop material 3 has a flat plate shape and can be rolled up.

"Effects of the Invention" As explained above, the terminal manufacturing method of the present invention eliminates the presence of plating on the contact area and the adhesion of harmful plating liquid, makes the plating film thickness uniform, and improves the plating quality of the terminal. do. This also has the effect of efficiently molding the high-quality plated terminals.

[Brief explanation of the drawing]

Fig. 1 shows a crimp terminal according to an embodiment of the present invention, (A) is a perspective view thereof, (B) is a plan view of its primary processed hoop material, Fig. 2 A crimp terminal according to another embodiment of the present invention , (A) is a perspective view thereof, (B) is a plan view of the primary processed hoop material,
Figure 3: Perspective view of a pressure contact terminal made by the conventional forming method Main symbols: : Pressure contact terminal, : Crimp terminal, 3 Kneaded hoop material, feed hole for nibless processing, 5 : Fractured surface contact area, : Flat hoop material , 7: Other punching parts. = U-shaped slot pressure welding blade, : Conical 2: Crimp terminal 3, primary processing hoop material 4, feed hole for nibless processing 5: fracture surface contact area, 10: receptacle-shaped contact area Sumitomo Wiring Systems, Ltd.

Claims (1)

[Claims] (1) In forming a plated terminal of a desired shape, the flat hoop material is progressively fed to create a "press feed hole" and at least a "broken surface contact area where the punched broken surface forms an electrical contact after forming the terminal" A flat plate-shaped primary processed hoop material is formed by punching, the roll-shaped primary processed hoop material is progressively fed and plated, and then a terminal is formed by performing secondary processing such as bending. A method for manufacturing a terminal characterized by: