JPS6056385A - Method of forming lead pin with middle collar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention eliminates the operation of taking the forming pin material into the forming tie by forming the lead pin with an inner flange, and in particular, by incorporating the sliding movement of the forming die. This has been designed to improve work efficiency and provide lead pins with good HR/'+ quality.

The molding of this god's cloth in the past was
The wire rod cut in a predetermined -J method by the cutter is transferred to the forming tie position, and after being pushed into the forming hole using the first punch, flanging treatment is performed using the second forming punch. This is what I did.

However, in the case of the shaped wire horn, it is necessary to take steps to accurately position the cut wire into the forming hole. 111th place 1+ considering the required 3 hits! z 1111 This drastically reduces the working efficiency per unit and makes it difficult to form a single bin smoothly.

In particular, it is difficult to accurately position the separated wire in front of the forming hole, which causes the wire to bend when pushed into the forming hole, resulting in the inconvenience of not being able to accurately push and position the wire into the hole. This is what I brought 2.

In addition, the sheared surface of the wire often becomes a helical part, and it is common for the sheared edge to develop a bulge, which makes it difficult to press the wire into the forming hole. l,
-It is something.

Furthermore, in the conventional method of cutting an extruded wire by applying it to a cutting piece and cutting it by force or force, the wire itself is bent considerably, which causes the wire to enter the forming hole in a circular or circular manner. This was seen as an obstacle to its introduction.

Forming method 1.1 of the lead pin according to the present invention: This method was specially devised in view of the inconveniences in the prior art, and it is possible to move the forming tie itself, which was previously considered to be a fixed device. With this equipment and L7, the wire rod is cut and moved to the forming throat punch section with the wire rod inserted into this forming die, and the operation of taking in the VJ broken wire material into the forming hole is completely eliminated by the J-free system. A description of how to handle and take in cut wire rods.
1- It effectively avoids the disadvantages of the prior art and promises smooth mass production of lead pins with good molding density.

The pin forming according to the present invention includes the following:1. In order to achieve the desired effect, a swaging forging machine with a molding tie movably installed in front of the cutting piece is designed to have a particularly effective structure. The wire is extruded in the direction in which the forming guide is installed, and the width is determined by inserting the extruded wire into the forming hole of the forming tie using a pin inserted into the forming hole. A step of inserting the swaging wire material corresponding to the width of the wire, a step of shearing the inserted wire material by moving the forming tie in a direction perpendicular to the extrusion direction of the wire material, and a step of moving the swaging wire material to the middle flange forming position. The process of extruding the extruded wire with the pin until it reaches ``rl f+'', the process of crushing and flushing the extruded wire with the tie and forming punch, and the process of ejecting the molded product with the pin, and the following specific steps are performed. It(4) for these examples.
However, considerable design changes were planned.

Hereinafter, one embodiment of the traditional molding method for the lead pin according to the present invention will be described with reference to the drawing (1).
) indicates the forming goo, (1) a indicates the forming hole, (2) indicates the ejector pin, (3) indicates the cutting piece, (4) indicates the forming punch, and m indicates the processed wire. be.

Therefore, the material feeding hole (3) is formed using an appropriate method so that the wire opening is directed from the inside of the Zino piece (3) toward the front end surface.
Extrude sequentially from a and place 1i on the front of this 9J piece (3)! 7
The molded material is forced into the hole (1) a in the molding die (]) which is positioned so as to be in contact with the molded material.

By passing through the hole (3) a, the wire m pushed in this way is bent, warped, etc. In addition to being easy to introduce, it also provided good 4i'i results during subsequent molding.

In addition, addition II to be introduced 1. The width of the base of the material has been adjusted in advance using the ejecting pin (2),
In addition, since warping and bending of the wire rod m introduced into the hole (1) a is suppressed, accurate swaging dimensions are guaranteed. In other words, in the conventional example, when the wire was sheared by 1 μm while in contact with the cutting piece, the wire itself warped and was bent, resulting in variations in shear dimensions, which resulted in the formation of the wire rod pin. It is b that has affected the quality of the product.

The wire m' thus swaged and cut is taken into the hole (1)a (yc); by moving the forming guide (1), the processed wire m is connected to the cutting piece (3) and the forming tie (1). It is sheared at the contact surface. During such shearing, the wire m is reliably held in holes (1) a and (3) a, thereby preventing unevenness in shearing qlY,i, and also preventing paring in the target plane. , which reliably prevents the induction of lotus faces.

Next, the ejector pin (2) is operated on the moving forming guide (1) to cut the wire m to the required width J, that is,
Draw the holes (
1) It protrudes from a, and is received by a forming punch (4), and the punch (4) is flanged by a dynamic seam.

Punch at the end of the flancing process (4)
Pull it! The pin (2) is operated again to cause the inner flange-equipped lead pinot a to protrude.

Lead pin forming method 1 according to the present invention; J1↑ on h diagonally
It is designed to have a basic effect on the above-mentioned characteristics, and in particular, it eliminates the need for lowering movements by the first and second punches, and improves work performance in a medium time (l/). In order to make the equipment faster and cheaper, the wire rod In was sheared and punched using Form F;, which was incorporated into the forming tie. This simplifies standardization in terms of quality.Also, the wire rod is inserted into the forming tie until the final forming process, which eliminates the occurrence of defective products during the forming process.
It was possible to particularly reduce the

These days, this type of lead pin is used in various electrical devices. There has been a huge demand for energy in the past, and there has been a boom in particular interest in lowering product costs and making quality uniform. Also, this kind of lead pins are usually glued to a long and thin wire-shaped one, and then pushed into the hole at 1 when it is aligned with the mountain.
``1st grade // (, 7) 1st difficulty) It's 1st grade. Especially the wire rod stirring Ml<,l! ′, :・Line length Ka2
・In the case, the ζ■j piece is
The force at 7 degrees is a little less than 11, and the canter's movement is 1 pa [direction ゛9, ↓ cut the lid to F7/kuutsuki] 1, then Ba [ko,
4. The cross section shall be perpendicular to the length direction of the wire.4. The shear plane of the lotus is made into // and brought to 0
There is e.

Also, of course, the cut wire rod is bent to the right, and guided to the hole position of the To1 type guide, and the IF
It is said that it is extremely difficult to fit it exactly in the exact position of the closet, and also due to the relationship between
This is due to bending due to poor insertion, resulting in the formation of a distorted shape, resulting in a damaged product due to multiple plantings.

In the present invention, it is possible to effectively mass-produce and fold wire rods that are as thin as possible, have dimensional accuracy and quality, and have good IJf even for wire rods with a high risk of bending. Therefore, the incidence of defective products in the molding process is low, and since the cost of equipment is relatively high, it is possible to provide a low-profile lead pin.

[Brief explanation of drawings]

Figures 1 to 4 are broken-down, first-plane views of essential parts showing the operating state of a typical embodiment of the molding method according to the present invention, and Figures 5A to C are perspective views of the molded product. be. In the figure, (1)...forming die, (2)...ejection pin, (3)...υ piece, (4)...forming punch, m
. . . Added lumber, a . . . Lead pin is shown. Figure l Figure 2 Figure 3 BC Figure 4

Claims (1)

[Claims] In a swaging forging machine in which a forming die is movably installed in front of a cutting piece, the processed wire is sequentially extruded from the inner side of the cutting piece in the direction in which the forming die is installed, and this extrusion A step of inserting the wire rod into the forming hole of the forming tie by an amount equivalent to the width of the base body determined by a pin loosely inserted into the box, and inserting the forming tie in a direction perpendicular to the extrusion direction of the wire rod. a step of moving and shearing the inserted wire; a step of pushing out the swaging wire with the pin until it reaches the middle flange forming position;
and a forming force method for a lead pin with a middle tsuba, which is characterized by comprising a step of performing JL crushing and flushing with a forming punch, and a degree of protrusion of the molded product by the pin.