JP4663953B2 - Press working method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention generally relates to a press working method and apparatus, and more particularly to a progressive press working method and apparatus. The present invention is suitable for, for example, a pressing method and apparatus used for manufacturing a motor core.
[0002]
[Prior art]
There is a motor core 400 as shown in FIG. 7 as a piece-like press product formed from a strip-like material. FIG. 7 is a perspective view showing an example of the motor core 400. FIG. 7A shows a case where a crimped shape is not formed, and FIG. 7B shows a case where a crimped shape 410 is formed. ing. In addition, in the case of the motor core 400 in which the crimped shape 410 is formed as shown in FIG. 7B, as shown in FIG. The motor core 400a is used.
[0003]
As a method of obtaining a piece-shaped press product from a strip-shaped material, a progressive press processing method that continuously performs multiple stages of press processing at a plurality of positions in the feed direction while feeding the material at a fixed pitch in the longitudinal direction. However, it is widely used to increase the efficiency of productivity.
[0004]
The progressive press processing method is basically based on the process of obtaining a predetermined contour shape (ie, the outer peripheral shape of the pressed product), and is basically a blanking press method (principle is "shear cutting") and an outer slit press method (principle) Are roughly divided into two types: “slit-out”. Here, with reference to FIG.8 and FIG.9, the total blanking press method and an outer periphery slit method are demonstrated. FIG. 8 is a schematic diagram showing the processing steps of the total punching press method. FIG. 9 is a schematic diagram showing the processing steps of the outer periphery slit press method. 8 and 9 show only a machining step for obtaining a predetermined contour shape among the press work of a plurality of stages.
[0005]
As shown well in FIG. 8, the total blanking press method is a gold comprising a punch 2000 corresponding to the outer peripheral shape of the pressed product and a die 2100 having a receiving hole 2110 offset by a larger clearance than the punch 2000. By using the mold 2300, the transport carrier 3000 is disposed between the punch 2000 and the die 2100 and movably with respect to the die 2100, and the punch 2000 is inserted into the receiving hole 2110 of the die 2100 to thereby transport the transport carrier. In this method, the area corresponding to the outer peripheral shape of the pressed product is removed from 3000 to obtain the pressed products 3100 and 3100a.
[0006]
On the other hand, as shown in FIG. 9, the outer peripheral slit press method is composed of a plurality of punches 4000a to 4000d and a die 4100 having receiving holes 4110a to 4110d offset by a larger clearance than the punches 4000a to 4000d. Using the mold 4300, a carrier carrier 3000 is disposed between the punches 4000a to 4000d and the die 4100 and movable relative to the die 4100, and the punches 4000a to 4000d are placed in the receiving holes 4110a to 4110d of the die 4100. By inserting the removed parts 3002a to 3002d having a shape corresponding to the outer shape of the punches 4000a to 4000d from the transport carrier 3000, the holding lead part 3200 for connecting the press product and the transport carrier 3000 remains. Divided between the outer peripheral shape as the conveying carrier 3000 of pressed products Te is a method of obtaining a peripheral shape of the pressed products.
[0007]
[Problems to be solved by the invention]
However, as shown in FIG. 8, the total blanking press method can obtain the outer peripheral shape of the press product 3100 in one press processing step, but the individual press product 3100 falls off from the transport carrier 3000. Continuity advantageous for conveyance and positioning accuracy to the apparatus 2500 in the next process such as marking is lost. Moreover, when laminating | stacking so that several sheets of a press product may be piled up, it is very difficult to laminate | stack the press product which fell out from the conveyance carrier, superimposing an outer diameter accurately. FIG. 10 is a schematic view showing an example in which the press product 3100 obtained by the total punching press method is handed over to the next step mainly by manual work.
[0008]
Moreover, FIG. 11 shows the case where it completes in the press process by performing the combined process of lamination | stacking and crimping joining within the metal mold | die 2600 on the assumption that it becomes an individual piece among the total punching press methods. In this case, the machining process is simplified without relying on the next process, but there are many problems. In particular, in addition to the conventional punching process, rotation, laminating mechanism and related parts for caulking and bonding are built in the mold, so that the mold itself is positioned as a special design and production, and the mold 2600 rear part Because of the mechanism 2700 disposed in the press, the load balance of the press punching is deteriorated, and the quality of the press product or the life in the mold is often deteriorated. Further, in order to control the mechanism 2700, one control unit 2800 is required for one press unit (for example, if there are two press units, another control unit 2800 ′ is required). Therefore, it has the disadvantages that it tends to be expensive and the press work becomes complicated.
[0009]
On the other hand, since the outer peripheral slit press method can deliver the transport carrier formed with the outer peripheral shape of the pressed product to the next process in a hoop shape, it is possible to maintain advantageous continuity in transport and positioning accuracy. However, the number of processing steps increases because it is necessary to form the outer peripheral shape of the press product in several steps depending on the strength of the transport carrier (for example, in FIG. 9, the outer peripheral shape of the press product is obtained. 2 steps are required for this purpose). The increase in the number of processing steps is limited due to restrictions on the press size and mold size, and in many cases cannot be handled (that is, the number of processing steps (multi-stage press processing) is limited, and it is necessary to form the outer shape of the pressed product. No process can be divided). In addition, a plurality of punches are required to divide between the outer peripheral shape of the pressed product and the conveyance carrier while leaving the holding leads, which increases the die cost.
[0010]
Furthermore, as shown in FIG. 8, when the pitch of the press product in the total blanking press method (distance between the centers of adjacent press products) is P1, the pitch of the press product in the outer peripheral slit press method is P1 + X. This is because the outer peripheral slit press method requires waste meat for strengthening the rim in the feeding direction of the carrier to form a slit-shaped part to be removed on the carrier. The amount of carrier (material) used is increased, resulting in an increase in cost. As shown in FIG. 9, scraps 3004a to 3004d are generated by punching the removed portions 3002a to 3002d from the transport carrier 3000. Therefore, in the case of a large press product, the scraps 3004a to 3004d are also large and discharged. Many problems arise in processing.
[0011]
[Means for Solving the Problems]
Accordingly, it is a general object of the present invention to provide a new and useful press working method and apparatus for solving such conventional problems.
[0012]
More specifically, an object of the present invention is to provide a pressing method and apparatus capable of obtaining a predetermined contour shape without increasing the number of processing steps and cost.
[0013]
The press working method as one aspect of the present invention is a press working method for obtaining an individual press product from a strip-shaped material, and the individual press product from the strip-shaped material. of A holding lead portion is formed by punching two adjacent portions of the portion corresponding to the outer periphery at a plurality of symmetrically arranged positions, and connecting the strip-shaped material and the individual pressed product between the two portions. Pre-punching step to form and said press product of Except for the holding lead part, the strip-like material of the part corresponding to the outer periphery Using a die having an outer peripheral shape forming punch and a receiving hole into which the outer peripheral shape forming punch is inserted By removing all the parts, the pressed product of the piece is separated from the strip-like material, leaving the holding lead part, and the holding lead part has the holding lead part. Downset processed A step of cutting the outer peripheral shape so that the strip-like material and the pressed product of the individual pieces can be connected together In the outer peripheral shape cutting step, the receiving hole has a notch extending outside the outer peripheral shape forming punch in a region where the holding lead portion is formed. To do. According to this press working method, the amount of scrap generated in the holding lead portion can be reduced, and the pitch of individual pieces (the distance between the centers of adjacent individual pieces) without reducing the strength of the strip-like material. Can be prevented from spreading. Further, the preliminary punching step may be performed in another pressing step for forming a built-in mechanism necessary for the piece.
[0014]
The metal mold | die as another side surface of this invention is a metal mold | die which obtains an individual press product from a strip-shaped material, Comprising: The said individual press product from the said strip-shaped material of A pair of rod-shaped holding leads that punch two adjacent portions corresponding to the outer periphery and form a holding lead portion that connects the strip-like material and the individual pressed product between the two portions. Forming punch and the press product of The strip-shaped material is separated from the strip-shaped material, leaving the retaining lead portion, by removing the strip-shaped material except the retaining lead portion corresponding to the outer periphery. In addition, in the holding lead portion, the holding lead portion is Downset processed An outer peripheral shape forming punch that allows the strip-shaped material and the individual press product to be connected to each other in a state of being pressed, a holding lead forming receiving hole into which the holding lead forming punch is inserted; Peripheral shape formation where a punch for forming the outer peripheral shape is inserted Receipt And the plurality of pairs of punches are arranged symmetrically at a plurality of positions corresponding to the outer periphery of the individual press product. ,in front Peripheral shape formation Receipt The Hole In a region where a holding lead portion for connecting the strip-shaped material and the piece is formed The outer peripheral shape forming punch extends outside. Has a notch. According to such a mold, a desired outer peripheral shape can be obtained in the strip-shaped material in one processing step while leaving the holding lead portion formed in the strip-shaped material. Further, the holding lead portion can be formed on the band plate-like material.
[0015]
According to still another aspect of the present invention, there is provided a press working apparatus comprising a strip-like material. Pieces Fragment Press products The above-mentioned die and a material supply unit for quantitatively feeding the plate-like material into the die. According to such a press working apparatus, the above-described mold is provided as a part of the constituent elements, and the same effect is obtained.
[0016]
Further objects and other features of the present invention will become apparent from the preferred embodiments described below with reference to the accompanying drawings.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, a press working method and apparatus which are an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a schematic configuration diagram of a press working apparatus 100 according to the present invention. The press processing apparatus 100 is a progressive press processing apparatus that continuously performs a plurality of stages of press processing at a plurality of processing positions to obtain individual pieces having a desired outer peripheral shape from a strip-shaped material, and is well illustrated in FIG. As shown, the material supplier 110 and the mold 120 are provided. However, the present invention is not limited to these examples, and each constituent element may be alternatively substituted as long as the object of the present invention is achieved. For example, although the press processing apparatus 100 of this embodiment has illustrated the case where the motor core 400 as shown in FIG. 7 is manufactured as a piece-like press product, it is applied to other press products. It does not prevent it.
[0018]
The material supplier 110 supplies a strip-shaped material 300. The material supply device 110 has, for example, a belt-shaped material 300 wound around and held in advance on a cylindrical shaft core 112, and has a rotation mechanism (not shown). A rotating mechanism (not shown) supplies a strip-shaped material 300 toward the mold 120.
[0019]
As shown in FIG. 2, the mold 120 includes an outer peripheral shape forming punch 130, a holding lead forming punch 140, and a die 150. (For the sake of convenience, the outer peripheral shape forming punch 130 will be referred to as the first punch 130, and the holding lead forming punch 140 will be referred to as the second punch 140.) The mold 120 includes the first punch 130 and the second punch 140. Pressing is performed on the transport carrier 300a transported between 140 and the die 150. However, the mold 120 includes not only the first punch 130 and the second punch 140 but also a plurality of punches (not shown) for forming the product shape 304 necessary for the motor core 400 at a plurality of processing positions. Simultaneous press working of steps. Here, FIG. 2 is a schematic exploded perspective view of a main part of the mold 120 of the press working apparatus 100. In FIG. 2, for convenience, the transport carrier 300 a is shown below, but in reality, it is transported between the first punch 130 and the second punch 140 and the die 150.
[0020]
The first punch 130 punches the motor core 400 (that is, the outer peripheral shape of the motor core 400) from the transport carrier 300a in cooperation with a die 150 described later. The first punch 130 has a shape corresponding to the outer peripheral shape of the motor core 400. For example, in the present embodiment, the first punch 130 has convex portions 132 corresponding to the three convex portions 420 of the motor core 400. The first punch 130 uses a high-hardness material having a hardness for punching at least the transport carrier 300a. The first punch 130 is disposed at the subsequent stage of the second punch 140 at the processing position.
[0021]
The second punch 140 cooperates with a die 150 to be described later to punch out at least two portions (removed portion 308) of the outer peripheral shape of the motor core 400 from the transport carrier 300a, and punched two locations (removed portion 308). ), A holding lead portion 306 for connecting the carrier 300a and the mower core 400 is formed. The second punch 140 is composed of, for example, a pair of rod-shaped punches, and has a substantially square cross-sectional shape as shown in FIG. FIG. 3 is a schematic sectional view of the second punch 140.
[0022]
2 and 3, the second punch 140 is formed so that the holding lead portion 306 to be formed sufficiently connects the transport carrier 300a and the motor core 400 in strength, and the removed portion 308 is removed. The vertical diameter a, the horizontal diameter b, and the width c are set so that the scrap 310 generated from the above becomes a small amount. The vertical diameter a and the width c of the second punch 140 are the lengths in the vertical and horizontal directions of the holding lead 306, and the vertical diameter a and the horizontal diameter b of the second punch 140 are the parts to be removed 308 (that is, generated). Amount of scrap 310 to be produced). That is, the first punch 130 separates the motor core 400 (the outer peripheral shape thereof) from the transport carrier 300a, but the holding lead. Part 306 Is bent in the same manner as in the downset process and holds the motor core 400. Therefore, if the vertical diameter a of the second punch 140 is set to be short, the downset process cannot be performed sufficiently, and the carrier carrier 300a. Therefore, if the width c of the second punch 140 is set to be short, the holding lead portion 306 is cut during downset processing (the width c is set to be long). If it does, a big force will be needed for a downset process, or the outer periphery shape of the motor core 400 cannot be isolate | separated from the conveyance carrier 300a). Further, if the longitudinal diameter a and the lateral diameter b of the second punch 140 are set to be long, the scrap 310 generated from the removed portion 308 of the transport carrier 300a increases and the transport direction of the transport carrier 300a is caused by the removed portion 308. The holding lead portion 306 cannot be formed if useless meat for strengthening the edge is required in the direction of arrow A and the lateral diameter b is set short. Therefore, by setting the vertical diameter a, the horizontal diameter b, and the width c of the second punch 140 in a well-balanced manner according to the size of the motor core 400, the holding lead portion 306 having sufficient strength is formed and generated. The amount of scrap 310 to be made is small, and the pitch of the motor cores 400 (the distance between the centers of adjacent motor cores 400) is determined as described above (FIG. 8) without requiring wasteful meat for strengthening the edges. ), And can be set to P1.
[0023]
The second punch 140 is disposed symmetrically at a position corresponding to the diameter corresponding to the outer periphery of the motor core 400. Accordingly, the holding lead portions 306 are also formed symmetrically, and the motor core 400 is connected to the transport carrier 300a in a well-balanced manner without being inclined. In the present embodiment, since the motor core 400 has the three convex portions 420 (the convex portions 132 of the first punch 130), the motor core 400 is disposed at three positions between the three convex portions 420 at a 120 ° pitch. . For example, when the motor core 400 has four convex portions, the second punch 140 is disposed at four positions between the four convex portions at a 90 ° pitch, and when the motor core 400 has five convex portions. The second punches 140 are arranged at a pitch of 72 ° at five locations between the five convex portions. The second punch 140 can move in the arrow B direction.
[0024]
The die 150 supports the transfer carrier 300a so as to be movable, cooperates with the first punch 130, punches out the motor core 400 (that is, the outer peripheral shape of the motor core 400) from the transfer carrier 300a, and cooperates with the second punch 140. Thus, the holding lead portion 306 is formed. The die 150 has a first receiving hole 152 into which the first punch 130 is inserted, and a second receiving hole 154 into which the second punch 140 is inserted. However, the die 150 corresponds not only to the first receiving hole 152 and the second receiving hole 154 but also to a plurality of punches (not shown) for forming the product shape 304 necessary for the motor core 400 at a plurality of processing positions. A receiving hole (not shown) is provided. The die 150 is disposed such that the first receiving hole 152 and the second receiving hole 154 are located directly below the first punch 130 and the second punch 140.
[0025]
The first receiving hole 152 has a notch 152a in a region where the holding lead portion 306 is formed. As shown in FIG. 4A, the cutout portion 152a is formed by increasing the clearance C in the region where the holding lead portion 306 is formed to be larger than the clearance C ′ in other regions. The cutout portion 152a is formed to have a size including a part of the removed portion 308 (a position corresponding to the second punch 140) of the transport carrier 300a and the holding lead portion 306. As a result, when the first punch 130 is inserted into the first receiving hole 152, the transport carrier 300a is not punched in the notch 152a, and the holding lead 306 is downset as shown in FIG. 4B. It is bent in the same manner as the processing to connect the carrier 300a and the motor core 400 (that is, when the first punch 130 is inserted into the first receiving hole 152, only the region having the clearance C ′ is hit from the carrier 300a. The region having the clearance C is set so as to remain without being punched from the transport carrier 300a). 4 is an enlarged plan view of a main part of the first punch 130 and the die 150, and FIG. 4A shows the relationship of the clearance C between the notch 152a and the first punch 130. FIG. FIG. 4B is a schematic view showing the holding lead portion 306 that has been downset by the notch portion 152a. 4C is a schematic plan view of the carrier 300a in which the holding lead portion 306 is formed and the outer peripheral shape of the motor core 400 is divided, and FIG. 4D is a FF in a region F in FIG. 'Shows the side shape. 4C and 4D, the carrier 300a and the motor core 400 are connected by the notch 152a of the first receiving hole 152 while the holding lead 306 is bent. It will be understood that
[0026]
The second receiving hole 154 punches the portion to be removed 308 from the transport carrier 300 a by inserting the second punch 140, and forms a holding lead portion 306 between the portions to be removed 308. The second receiving hole 154 is set with a certain clearance C ′ so as to punch out the removed portion 308 from the transport carrier 300a.
[0027]
As described above, the first punch 130 and the second punch 140 and the die 150 (that is, the first receiving hole 152 and the second receiving hole 154) constitute the holding formed on the transport carrier 300a. While leaving the lead portion 306, the outer peripheral shape of the motor core 400 can be obtained on the transport carrier 300a in one processing step (that is, while applying the total removal method). Therefore, the conveyance carrier 300a can be discharged in a hoop shape in which the conveyance carrier 300a and the motor core 400 are connected by the holding lead portion 306 without increasing the number of processing steps. However, in the present embodiment, the notch 152a is provided on the die 150 side, that is, in the first receiving hole 152, but the cross section is recessed in the region where the holding lead portion 306 of the first punch 130 is formed. The same effect can be obtained even if a cutout portion having a shape (that is, a portion where the cutting edge is missing) is provided.
[0028]
Hereinafter, the operation of the press working apparatus 100 will be described with reference to FIGS. 2 and 5. FIG. 5 is a flowchart for explaining the operation of the press working apparatus 100. However, the press processing apparatus 100 simultaneously performs a plurality of stages of press processing at a plurality of processing positions. a Will be described with attention until one motor core 400 is obtained.
[0029]
First, a plurality of punches (not shown) of the mold 120 are lowered with respect to the strip-shaped material 300 that is quantitatively fed in the direction of arrow A from the material feeder 110, and the pilot hole 302 and the motor core 400 are required. A product shape 304 or the like to be formed is formed.
[0030]
When the transport carrier 300a in which the pilot hole 302 and the product shape 304 are formed is transported under the second punch 140, the second punch 140 is lowered and inserted into the second receiving hole 154 of the die 150. Then, at least two parts of the outer peripheral shape of the motor core 400 (removed part 308) are punched from the carrier 300a, and the holding lead part 306 is formed between the two removed removed parts 308 (step). 1002). Here, the holding lead portion 306 is formed where there is no problem in use (performance) of the motor core 400. Further, the removed portion 308 punched out from the transport carrier 300a to form the holding lead portion 306 is formed to such an extent that the edge strength of the transport carrier 300a is not lowered. Therefore, the pitch of the motor cores 400 (the distance between the centers of adjacent motor cores 400) can be set to P1, and an increase in the cost of the transport carrier can be prevented without causing wasteful meat. In addition, since the scrap 310 generated from the part 308 to be removed of the transport carrier 300a is very small relative to the amount of scrap generated by the conventional outer peripheral slit press method, the discharge process can be performed without any problem. Further, since the removal target portion 308 to be punched out in forming the holding lead portion 306 is very small, it can be included in other steps (that is, the step of forming the product shape 304 of the pilot hole 302 and the motor core 400). It is possible to prevent an increase in processing steps.
[0031]
Next, after the transport carrier 300a on which the holding lead portion 306 is formed is transported under the first punch 130, the first punch 130 is lowered and inserted into the first receiving hole 152 of the die 150 for holding. The outer peripheral shape of the motor core 400 is divided from the carrier 300a, leaving the lead portion 306 for use (step 1004). As a result, the motor core 400 (peripheral shape) can be obtained in a single machining step, and is held by the notch 152a provided in the first receiving hole 152 while applying a so-called blanking press method. The lead portion 306 for use can be left. Therefore, the outer peripheral shape of the motor core 400 can be obtained in a state where the transport carrier 300a and the motor core 400 are connected by the holding lead portion 306 without increasing the number of processing steps, and the transport and positioning accuracy in the next process can be obtained. An advantageous continuity can be maintained. As shown in FIG. 2, the holding lead portion 306 is bent in the same manner as in the downset process, and connects the carrier 300a and the motor core 400. a However, the amount of the depression depends on the length of the holding lead 306 (that is, the size of the second punch 140) and the amount of cutting edge insertion. The adjustment is made so as not to affect the conveyance of the carrier 300a.
[0032]
As shown in FIG. 6, the hoop-shaped transport carrier 300a obtained in this way can be delivered to the next-stage apparatus 500 that performs marking or the like while maintaining advantageous continuity in terms of transport and positioning accuracy. . FIG. 6 is a schematic view showing an example in which a semi-finished motor core product is delivered to the next process with the hoop-shaped transport carrier 300a obtained by the press working apparatus 100.
[0033]
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.
[0034]
【The invention's effect】
According to the present invention, an individual piece having a desired outer shape can be obtained in a state where it is connected to a transport carrier, so that it is possible to maintain advantageous continuity in terms of transport and positioning accuracy. Moreover, since it is possible to reduce the number of steps and scrap for obtaining a desired outer peripheral shape, it is possible to suppress the cost increase of molds and materials and the problem of scrap discharge processing.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a press working apparatus according to the present invention.
FIG. 2 is a schematic exploded perspective view of a main part of a mold of the press working apparatus shown in FIG.
FIG. 3 is a schematic cross-sectional view of a second punch shown in FIG.
4 is an enlarged plan view of a main part of the first punch and the die shown in FIG. 2. FIG.
FIG. 5 is a flowchart for explaining the operation of the press working apparatus shown in FIG. 1;
6 is a schematic view showing an example in which a semi-finished product is delivered to the next process with a hoop-shaped transport carrier obtained by the press working apparatus shown in FIG. 1. FIG.
FIG. 7 is a perspective view showing an example of a motor core as a press product.
FIG. 8 is a schematic view showing a processing step of a total punching press method.
FIG. 9 is a schematic view showing a processing step of the outer periphery slit press method.
FIG. 10 is a schematic view showing an example in which a press product obtained by a total punching press method is handed over to the next step mainly by manual work.
FIG. 11 is a schematic configuration diagram of a press working apparatus of a total blanking press method incorporating a composite work.
[Explanation of symbols]
100 Press processing equipment
110 Material feeder
120 mold
130 First punch
140 Second punch
150 die
152 First receiving hole
152a Notch
154 Second receiving hole
300 Strip material
300a Carrier
306 Holding lead
400 motor core

Claims (3)

A press working method for obtaining a pressed product from a strip-shaped material,
The strip plate material is punched at a plurality of symmetrically arranged two locations in the portion corresponding to the outer periphery of the individual press product , and the strip plate material and the two pieces are placed between the two locations. A preliminary punching step for forming a holding lead portion for connecting the pressed product of the pieces;
Using a die having an outer peripheral shape forming punch and a receiving hole into which the outer peripheral shape forming punch is inserted , except for the holding lead portion, in a portion corresponding to the outer periphery of the pressed product. By removing the whole, the pressed product of the piece is separated from the strip-like material leaving the holding lead portion, and the holding lead portion is downset processed in the holding lead portion. pressed products of the band plate-like material and the individual pieces are perforated and an outer peripheral shape cutting step to allow coupling in the state,
In the outer peripheral shape cutting step, the receiving hole has a notch portion extending outside the outer peripheral shape forming punch in a region where the holding lead portion is formed . A mold for obtaining individual press products from a strip-shaped material,
Two adjacent portions in the portion corresponding to the outer periphery of the individual pressed product are punched from the strip-shaped material, and the strip-shaped material and the individual pressed product are connected between the two locations. A plurality of pairs of rod-shaped holding lead forming punches that form holding lead portions; and
The strip plate-like material is entirely removed except for the holding lead portion corresponding to the outer periphery of the press product , thereby leaving the holding lead portion and removing the individual pieces from the strip plate-like material. Forming an outer peripheral shape that divides the pressed product and allows the strip-shaped material and the individual pressed product to be connected in the holding lead portion in a state where the holding lead portion is downset. For punch,
And a die having a peripheral shape forming accept hole the a holding lead forming receiving hole the holding lead forming punch is inserted peripheral shape forming punch is inserted,
The plurality of pairs of punches are arranged symmetrically at a plurality of positions corresponding to the outer periphery of the individual press product,
Before Kigaishu shape forming accept holes, Oite a region holding lead portion connecting the pieces and the strip-like material is formed, notches extending outwardly of the outer peripheral shape forming punch Mold with parts. A press working device for obtaining individual press products from a strip-shaped material,
A mold according to claim 2;
A press working apparatus comprising: a material supply unit that quantitatively feeds the plate-like material into the mold.

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