JPH0581166B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc-shaped flat part having a cross section on its tip surface that is parallel to a cross section of a cylindrical shaft part and bulges out from the cross section of the cylindrical shaft part; The disc-shaped flat part has an oval-shaped flat part that is U-bent in the center of the other end of the flat part, and is connected between the disc-shaped flat part and the oval-shaped flat part and with the other of the oval-shaped flat parts. The present invention relates to a method for processing a lead terminal, which is an integral electronic component having a cylindrical shaft portion up to the other end.

Prior Art In order to manufacture lead terminals having the shapes shown in FIGS. 9 and 10, flattening of the oval-shaped flat part from the direction perpendicular to the wire rod axis, trimming of the oval-shaped flat part, and The U-bending of the wire, the hedging of the disc-shaped flat part on the end face of the tip end from the axial direction of the wire, and different types of processing must be performed in a well-ordered combination. Conventionally, each process was processed using multiple machines such as a single press machine. It was done by

Problems to be Solved by the Invention The lead terminals shown in FIGS. 9 and 10 have a full length
Because the parts are small, about 17 mm in diameter, they are difficult to handle in conventional one-off processing where each process is performed in one department.
It was difficult to handle the work because it was difficult to position it for ejection or processing. For this reason, machining efficiency was not improved and workability was very poor.

Means for Solving the Problems The present invention provides a method in which the raw material is sequentially sent out as a wire for a certain length, various processes are applied to the wire, the wire is cut immediately before the final processing, and the wire is cut until the final forming process. It is characterized by the fact that it has been adopted.

That is, in the present invention, the raw material of the wire shown in FIG. 1A is flattened using a forming apparatus to flatten the central part of the wire into the oval shape shown in FIGS. 1B and 7. Subsequently, both sides of the oval-shaped flat part shown in FIGS. 1C and 8 are cut to a constant width by trimming. Further, the oval-shaped flat portion shown in FIG. 3 is subjected to a U-bending process. Thereafter, the end face of the tip of the wire is subjected to a preliminary crushing process as shown in FIG. 4, and then cut to a fixed size as shown in FIG. 5, and the cutting member is transferred in a direction perpendicular to the axis of the wire. Then, the disk-shaped flat portion shown in FIG. 6 is flattened to produce lead terminals shown in FIGS. 9 and 10.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 10.

The flattening process of the oval-shaped flat part shown in FIG. 1B and FIG.
10, 10, and 10, the punch 12 and die 14 are pressed to flatten the central portion of the wire W to a desired thickness from the direction perpendicular to the wire axis.

The trimming process shown in Fig. 1C and Fig. 8 is as follows:
The oval-shaped flat part processed above is transferred so as to engage with the lower end of the trimming die 20 shown in FIG. After pressing to the surface, trimming punch 21
is pressed to shear the oval-shaped flat part and enter the inner part of the die holes 22, 22 provided in the trimming die 20 to cut it into a constant width.

In the U-bending process of the oval flat part shown in FIG. 3, the wire rod W is fed out to a fixed length through the cutting die 38 as shown in FIG. material clamp 31,
31 (The material clamps 31, 31 are held by the wire rod W
If necessary, the wire W is held slightly loosely so that the cylindrical end of the wire can return to the oval flat part by U-bending. ), the third
By pressing the U-bending punch 32 and U-bending die 34 shown in the figure, a desired U-bending process is performed on the oval-shaped flat portion from the direction perpendicular to the axis of the wire.

When performing this U-bending process, if necessary, depending on the bending state of the U-bending process, the tip of the wire rod W is shaped into an oval shape from the direction opposite to the tip surface using a preliminary crushing punch 36 shown in FIG. By pressing lightly toward the flat part, U-bending can be easily formed.

In addition, the wire rod feeding shown in Figure 1 A → B → C → D involves sequentially feeding the wire a fixed length in the direction toward the tip along the wire axis using a feeding device such as a gripper feed (not shown). .

The preliminary crushing process shown in FIG. 4 is performed on the wire rod W shown in FIG.
are the material clamps 30, 30 and the material clamp 31,
31, the U-bending punch 32, and the U-bending die 34 fix and hold the wire, then use a preliminary crushing punch 36 shown in FIG. Perform preliminary crushing from the direction opposite to.

In the subsequent cutting process shown in FIG. 5, after the preliminary crushing punch 36 moves back and forth after the preliminary crushing process is completed, the material clamps 30, 30 and the material clamps 31, 31
Then, while the wire is held fixed by the U-bending punch 32 and the U-bending die 34, the entire wire is moved in the direction perpendicular to the wire axis, and the material clamps 30, 30 and the cutting die 38
The wire rod including the oval flat part and the pre-crushed part is cut to a predetermined length by shearing between the parts. Subsequently, while the cutting member is fixedly held by the material clamps 30, 30, 31, 31, the U-bending punch 32, and the U-bending die 34, the entire cutting member is transferred to the next step in the direction perpendicular to the wire axis.

The flattening process of the disk-shaped flat part shown in FIG. 6 is carried out by pressing the flattening punch 39 on the preliminary crushing part of the member cut to a fixed length in FIG. 5 from the direction opposite to the end surface. Then perform the desired flattening process and shape. Thereafter, from the completed member formed as described above, a flattening punch 39, material clamps 30, 30,
After the material clamps 31, 31, the bending punch 32 and the U-bending die 34 are separated, and the finished part is ejected by means not shown, the material clamps 30, 3 are removed.
0, material clamp 31, 31, U bending punch 32
and the U-bending die 34 respectively form the wire rod W shown in FIG.
The material clamp 30, 30 and material clamp 3
The wire is returned to the state before being held at steps 1 and 31, and is ready for the next wire processing.

This is a method of processing the lead terminals shown in FIGS. 9 and 10 by automatically and continuously reproducing the forming process from the wire by repeating the operations described in the above embodiments.

Effects The present invention is a processing method that can automatically and continuously form the wire material to the final disc-shaped flat part in forming processing that requires action on the wire material in the direction perpendicular to the wire rod axis and in the wire rod axial direction. Therefore, multiple molding devices that were previously required can now be configured with a single molding device, and parts supply and discharge that were required between the multiple molding devices that were required in the conventional technology can now be configured with a single molding device. Also, transportation and positioning of parts are no longer necessary, making it easy to simplify and increase efficiency of the device.

Therefore, space saving, manpower saving, energy saving, etc. can be easily achieved, and parts can be provided at low cost.

[Brief explanation of the drawing]

In Figure 1, A indicates the start of feeding the wire, B indicates the flattening of the oval-shaped flat part, C indicates the trimming of the oval-shaped flat part, and D indicates the end of the wire at the next forming process after trimming. FIG. 3 is a plan view showing the machining shape and the machining form up to the state where the machine is sent out, in a state where the machining of each process is completed. FIGS. 2 to 4 are plan views showing the processed shape and form from before the oval flat part U-bending process to the preliminary crushing process of the tip part, in a state where each process is completed. FIG. 5 is a plan view showing the processing shape and processing state in which the cutting member is transferred after the fixed-size cutting processing. FIG. 6 is a plan view illustrating the processed shape and form of flattening of a disk-shaped flat part in a state in which the processing is completed. FIG. 7 is a side view of FIG. 1B showing the processed shape of the oval flat part flattening process. FIG. 8 is a side view of FIG. 1C showing the processing shape and form of oval flat part trimming processing. FIGS. 9 and 10 are a plan view and a side view showing the completed shape of the lead terminal. The arrows shown in FIGS. 1 to 6 indicate the direction of the pressing action of the material clamp and forming tool in the respective steps. 10...Material clamp, 12...Punch, 14
...Die, 20...Trimming die, 21...Trimming punch, 30,31...Material clamp,
32...U bending punch, 34...U bending die, 3
6... Preliminary crushing punch, 38... Cutting die, 39
...Flat crushing punch, W...Wire rod.

Claims (1)

[Claims] 1. For wire rods that are sent out sequentially for a certain length,
After forming an oval-shaped flat part in the center of the wire rod by flattening from a direction perpendicular to the wire axis, the oval-shaped flat part is trimmed to a constant width from a direction perpendicular to the wire axis, and then the oval-shaped flat part A U-bending process is applied to the part from a direction perpendicular to the axis of the wire rod, and then a preliminary crushing process is performed to the tip part of the wire from a direction opposite to the end surface of the tip part of the wire rod, and then the oval-shaped flat part and the preliminary crushing part are After cutting in the direction perpendicular to the wire rod axis to a predetermined length, the cutting member is then transferred in the direction perpendicular to the wire rod axis, and the preliminary crushing portion of the cutting member is flattened from the direction opposite to the end face. 1. A method for processing a lead terminal, which comprises manufacturing a lead terminal by molding a disk-shaped flat part.