JPH0732060A - Die device - Google Patents

Abstract

PURPOSE:To provide a die device, in which working oil can directly be given to the tip part of a punch for pressing and working member. CONSTITUTION:In one pair of pressing die devices arranging an upper die 50 so as to be vertically movable, the punch 28 fixed to the base part of a lower die 60, a die 16 formed in the upper die and the lower die are constituted. Further, this pressing die device is composed of a stripper plate 30 arranged so as to have the distance for the base part and boring a through-hole 34 so as to be possible to pass through the tip part of the punch, and an oil passage 40 for introducing the working oil into the stripper plate is formed and also, an injection hole 42 extended from the oil passage is opened in the inner wall surface of the through-hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus, and more specifically, it is composed of a pair of press dies each having an upper die or a lower die formed so as to be vertically movable, and presses a work material such as a metal plate. Regarding mold equipment.

[0002]

2. Description of the Related Art Conventionally, heat radiating fins used in the heat radiating portion of heat exchangers such as automobile coolers and room coolers are
For example, it is manufactured through the press working process shown in FIG. 5 proposed in JP-A-3-128131. In the pressing step, after the conical portion 2 is formed on the metal plate 1 (step of FIG. 5 (I)), the conical portion 2 is formed mainly by extending the thin plate portion near the apex to form the flat portion 4. The container portion 3 has a truncated cone shape or a cylindrical shape [step of FIG. 5 (II)]. Next, after the flat portion 4 of the container portion 3 is subjected to a drilling process and a burring process to form a projecting piece 7 on the periphery of the drilling hole 6 [step of FIG. 5 (III)], the projecting piece 7 and the collar 8 are formed. An ironing process is performed to form a colored through hole having a predetermined height [steps of FIGS. 5 (IV) and 5 (V)]. Then, if necessary, the tip of the collar 9 is bent to form a collar 10 [Fig. 5 (VI)].
Process of].

This press working process is carried out by using a die device shown in FIG. The metal plate supplied from the direction of the arrow A to this mold device moves intermittently and moves up and down. The upper mold mounted on the upper mold substrate 100 and the lower mold substrate 2 in a stopped state.
Stage 102, 10 consisting of a lower die mounted on
After passing through 4, 106, 108, and 110, it is taken out in the direction of arrow B. Of these stages, stage 10
5 in the process of FIG. 5 (I), the process of FIG. 5 (II) in the stage 104, and the process of FIG.
In the process (III) and the stage 108, FIG.
In the step (V) and the stage 110, as shown in FIG.
Each of the steps I) is performed. A punch and / or a die suitable for each process are attached to each of these stages, and FIG. 7 shows a partial cross-sectional view of the stage 108 for performing the ironing process of FIGS. 5 (IV) and (V).

The stage 108 is composed of an upper die 300 and a lower die 400, and a die 116 is fixed by plates 112 and 114 constituting the upper die 300. The die 116 is provided so that its tip projects slightly downward from the surface of the plate 114 that forms the lower surface of the upper die 300.
The knockout 118 biased in the direction 00 is inserted. In addition, the plate 1 that forms the base of the lower mold 300
A punch 128 for ironing is fixed to the lower mold 300 with a tip portion protruding from the cylindrical member 126 by a member 132 inserted in the cylindrical member 126 fixed by 22 and 124. At the tip of the punch 128, a tip 138 having a diameter smaller than the diameter of the punch 128 is a guide portion of the punch 128, and the inning process is performed by a corner 136 of the punch 128. Lower mold 3
A stripper plate 130 is urged in the direction of the upper mold 300 by an urging member (not shown) in the vicinity of the tip of the punch 128 fixed to the base of the stripper 00, and a predetermined distance is provided between the stripper plate 130 and the base. Has been. The stripper plate 130 is formed with a through hole 134 through which the tip of the punch 128 can pass, and when the load is not applied to the stripper plate 130, the tip of the punch 128 is below the upper surface of the stripper plate 130. like,
The stripper plate 130 is aligned.

On the upper surface of the stripper plate 130, the metal plate 1 having the projecting piece 7 formed on the periphery of the hole 6 shown in FIG. 5 (III) is mounted, and the ironing shown in FIGS. 5 (IV) (V) is carried out. Processing is applied. At this time, the upper die 300 moves downward and presses the stripper plate 130 downward by the tip surface of the die 116, shortens the distance between the upper die 300 and the base portion, and passes the tip of the punch 128 through the through hole 134 to pass the stripper plate. It projects on the upper surface of 130. Further, by moving the upper die 300 downward, the tip of the punch 128 protruding from the upper surface of the stripper plate 130 enters the die 116 while pushing the knockout 118 upward against the biasing force of the spring 120. , Dice 1
The projecting piece 7 is subjected to the ironing process with the inner wall surface of 16. As shown in FIG. 8, the ironing process ends when the corner 136 formed at the tip of the punch 128 passes through the projecting piece 7.

In addition to the upper and lower mold stages 108 shown in FIG. 7, each of the upper and lower mold stages provided with punches and / or dies suitable for each process is arranged in the order of processes. According to the provided mold device shown in FIG. 6, the through hole with collar of a predetermined height can be formed by passing the metal plate 1 from the direction of arrow A to the direction of arrow B. By the way, in the press working shown in FIG. 6, in order to improve the press workability, press working oil is applied to the metal plate supplied to the die device. This press working oil has been conventionally removed by CFC cleaning or the like after the press working. However, recently, from the viewpoint of global environment protection, the use of CFC liquid is restricted, and therefore volatile press working oil that can eliminate CFC cleaning even in press working is being used. On the other hand, since volatile press working oil easily scatters, the volatile press working oil applied to the metal plate before being supplied to the die device is almost scattered when the press working is performed at each stage. Therefore, the press workability may be significantly reduced.

In order to prevent such deterioration of workability,
The inventors of the present invention have proposed a mold device shown in FIG. 9 in Japanese Patent Application No. 2-243005. In this mold device, the punch 128 and the member 13 fixed to the lower mold are used.
2, and the oil passages 138 and 140 are formed in the knockout 118 inserted into the upper die 116, and the oil passage 13 is formed.
The press working oil is supplied to the punch 128 and the metal plate 1 via 8, 140.

[0008]

According to the mold apparatus shown in FIG. 9, when press working is performed at each stage, the press working oil is applied to the press working place of the metal plate 1 placed on the stripper plate 130. It is possible to prevent the situation where press working is performed on the metal plate 1 on which the press working oil is almost scattered. However, as shown in FIG. 9, when the front end surface of the punch 128 and the lower surface of the knockout 118 contact each other, the openings of the oil passages 138 and 140 are closed and the press working oil is not ejected, so that during the ironing process. Cannot apply the pressing oil to the punch 128. In addition, the tip surface of the punch 128 and the knockout 11
Oil passage 13 shown in FIG.
Although the press working oil is jetted out via Nos. 8 and 140, the press working oil cannot be directly sprayed to the corner portion 136 of the punch 128 to be subjected to the ironing work. For this reason,
In the conventional die device, it is not possible to directly apply the press working oil to the place where the press working oil is required, that is, the tip of the punch to perform the press working and the work material portion to be pressed. It required a large amount of processing oil.
Therefore, an object of the present invention is to provide a die apparatus that can directly apply the press working oil to the tip of the punch to be pressed and the work material part to be pressed, which requires the press working oil most. To do.

[0009]

As a result of studies to achieve the above object, the present inventors formed an oil passage in a stripper plate provided near the tip of the punch, and the tip of the punch passes therethrough. By opening an injection hole from the oil passage on the inner wall surface of the through hole, it was found that the press working oil can be directly applied to the punch tip portion subjected to the press working and the work material portion subjected to the press working, and the present invention was reached. did. That is, the present invention comprises a pair of press dies in which an upper die or a lower die is provided so as to be movable up and down, and constitutes a pair of press dies in a die device for pressing a work material such as a metal plate. A punch fixed to one base of the mold, a die provided in the other mold constituting the pair of press dies, the tip of the punch being insertable, and a die to which the punch is fixed. A plate that constitutes one side and is provided at a distance from the base, and when an upper die and a lower die that constitute the pair of press dies are close to each other, between the base and The stripper plate is formed with a through hole through which the tip of the punch can pass so that the distance between the punch and the tip of the punch protrudes from the die side surface of the plate and enters the die. stripper In rate, together with the oil passage pressing oil is conducted is formed, the injection holes extending from the oil passage is in the mold apparatus characterized by being open to the inner wall surface of the through hole.

[0010]

According to the present invention, the press working oil can be jetted into the through hole formed in the stripper plate.
Therefore, the pressing oil can be directly applied not only to the portion where the processed material is pressed, but also to the tip of the punch that passes through the through hole and directly presses the processed material. . Therefore, according to the mold apparatus of the present invention, the press working oil can be efficiently applied only to the place where the press working oil is most needed.

[0011]

The present invention will be described in more detail with reference to the drawings.
A mold apparatus according to an embodiment of the present invention is a mold apparatus that forms the through holes with collars shown in FIG. 5, and the mold apparatus is schematically shown in FIG. Since the description of FIG. 6 has been given above, it is omitted here. The stage 108 shown in FIG.
FIG. 1 is a partial cross-sectional view of a stage for performing the ironing process of FIGS. 5 (IV) and 5 (V). In FIG.
The stage 108 is composed of an upper mold 50 and a lower mold 60, and the dice 16 are fixed by the plates 12 and 14 constituting the upper mold 50. The die 16 is provided so that the tip thereof projects slightly downward from the surface of the plate 14 forming the lower surface of the upper die 50, and a knockout 18 biased downward by a spring 20 is inserted into the die 16. . In addition, the plate 22 forming the base of the lower mold 50,
The member 28 inserted into the tubular member 26 secured by 24 secures the punch 28 for the ironing process to the lower die 50 with the tip portion protruding from the tubular member 26.

At the tip of the punch 28, the punch 28
The tip 38 formed to have a diameter smaller than the diameter of the punch 28 is a guide portion of the punch 28, and the corner portion 36 of the punch 28 is subjected to the ironing process.
Done by A biasing member (not shown) is provided near the tip of the punch 28 fixed to the base of the lower mold 50 in this manner.
The stripper plate 30 is urged in the upper mold direction by a predetermined distance from the base portion. The stripper plate 30 is formed with a through hole 34 through which the tip of the punch 28 can pass.
When the load is not applied to 0, the tip of the punch 28 should be below the upper surface of the stripper plate 30,
The stripper plate 30 is aligned. On the upper surface of the stripper plate 30, the metal plate 1 having the projecting pieces 7 formed on the periphery of the hole 6 shown in FIG. 5 (III) is mounted, and the ironing process shown in FIGS. 5 (IV) (V) is performed. To be done.

In the present embodiment, two oil passages 40, 40 sandwiching the through hole 34 are formed in the stripper plate 30, and the ejection holes 4 extending from each of the oil passages 40, 40.
2, 42 are opened on the inner wall surface of the through hole 34. Mist-shaped press working oil is conducted to the oil passages 40, 40, and is ejected toward the tip of the punch 28 via the ejection holes 42, 42. In this embodiment, four jet holes 42 are provided between each of the oil passages 40, 40 and the through hole 34 as shown in FIG. 2, and each jet hole 42 is in a tangential direction of the through hole 34. It is formed so that press working oil is ejected. Therefore, the press working oil is ejected in a spiral shape from each of the ejection holes 42 into the through hole 34, and the press working oil is applied to the tip end portion of the punch 28 and the protruding piece 7 formed on the metal plate 1.

By the way, the lower mold 6 of the stage 108 is usually used.
Since a plurality of punches 28 are fixed to 0, a plurality of through holes 34 are also formed in the stripper plate 30. For this reason, as shown in FIG. 3, the oil passages 40 connected to the press-working oil conduction holes 44 formed on both sides of the stripper plate 30 are connected to the through holes 34 formed in the stripper plate 30. Two injection holes 42 are formed so as to be sandwiched, and each of the through holes 34 extends from each of the oil passages 40. This press oil passage hole 44, 44
Is supplied with mist-like press working oil from the directions of arrows C and D. Since the stripper plate 30 is provided so as to be movable up and down, the press working oil passage hole 44,
The mist-shaped press working oil is supplied to the 44 through a flexible tube.

As shown in FIG. 1, the stripper plate 3
The punch 28 is attached to the protruding piece 7 of the metal plate 1 placed on 0.
Is subjected to ironing processing. At this time, oil passage 4
The press working oil conducted to 0 and 40 is ejected into the ejection holes 42 and 4
The press working oil can be directly applied to the inside of the projecting piece 7 and the tip end portion including the corner portion 36 of the punch 28 by being sprayed into the through hole 34 via 2. Next, the upper die 50 moves downward and the tip surface of the die 16 presses the stripper plate 30 downward to shorten the distance between the upper die 50 and the base portion so that the tip portion of the punch 28 projects to the upper surface of the stripper plate 130. . Further, as the upper die 50 moves downward, the tip of the punch 128 protruding to the upper surface of the stripper plate 130 passes through the hole 6 and moves the knockout 18 upward against the biasing force of the spring 20. While pushing up to the inside of the die 16, the protruding piece 7 is subjected to the ironing process with the inner wall surface of the die 16. The ironing process ends when the corner 36 of the tip of the punch 28 passes through the protruding piece 7. In the present embodiment, even during the ironing process, the punch 2 that brings the press working oil sprayed from the spray holes 42, 42 into contact with the projecting piece 7.
It can be directly sprayed on the eight parts, and the press workability can be improved.

FIG. 1 shows an outline of the stage 108 for performing the ironing process, but the steps shown in FIG. 5, that is, the step of forming the conical portion 2 on the metal plate 1 [step of FIG. 5 (I)]. A step of forming the flat portion 4 by extending the conical portion 2 mainly in the thin plate portion near the apex to form the truncated cone or cylindrical container portion 3 [step of FIG. 5 (II)], the flat portion of the container portion 3 The stripper plate is also used in the stage of performing each step of the step [step of FIG. 5 (III)] in which the protruding piece 7 is formed on the peripheral edge of the hole 6 by performing the drilling processing and the burring processing on the step 4. . Therefore, as shown in FIG. 1, by forming an oil passage through which the press working oil is conducted in the stripper plate and opening an injection hole extending from the oil passage on the inner wall surface of the through hole, the most pressing work is performed. The press oil can be efficiently applied only to the places where oil is required.

In the embodiment described above, the four injection holes 42 are formed in the through hole 34, but as shown in FIG. 4, it may be two or one. Good. Further, although the punch 18 is fixed to the lower mold 60, it may be fixed to the upper mold 50 that is vertically movable. in this case,
The stripper plate 30 may be fixed to the upper mold 50 side or the lower mold 60 side. Further, as shown in FIG. 9, an oil passage may be formed inside the punch 28, the knockout 18, and the like. It should be noted that, although the present embodiment has been described with respect to the mold device that molds the radiation fins used in the heat radiation portion of the heat exchanger, this embodiment is not applicable to any mold device that includes a stripper plate. Of course.

[0018]

According to the present invention, since the press working oil is applied to the work material and the punch immediately before the press working is performed by the punch, the press workability is improved even if the volatile press working oil is used. Can be improved. Moreover, since the press working oil can be efficiently applied only to the places where the press working oil is most necessary and the use amount of the press working oil can be reduced as much as possible, the press working cost can be reduced. it can.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view illustrating a stage for ironing processing that constitutes a mold device according to the present invention.

FIG. 2 is a partial plan sectional view illustrating an oil passage and an injection hole formed in the stripper plate shown in FIG.

FIG. 3 is a partial plan sectional view illustrating an oil passage and an injection hole formed in a stripper plate having a plurality of through holes.

FIG. 4 is a partial plan sectional view showing another embodiment.

FIG. 5 is an explanatory diagram for explaining a manufacturing process of a radiation fin used for a radiation portion of the heat exchanger.

FIG. 6 is a schematic diagram for explaining an outline of a mold device that performs a manufacturing process of the radiation fin shown in FIG.

FIG. 7 is a partial vertical cross-sectional view illustrating the structure of a conventional ironing stage that constitutes the mold device shown in FIG.

8 is a partially enlarged vertical cross-sectional view for explaining the structure of the conventional ironing stage shown in FIG.

9 is a partially enlarged vertical cross-sectional view for explaining an improved example of the conventional ironing processing stage shown in FIG.

[Explanation of symbols]

 16 die 18 punch 30 stripper plate 34 through hole 40 oil passage 42 injection hole 50 upper mold 60 lower mold

Claims (1)

[Claims] 1. A mold apparatus comprising a pair of press dies provided with an upper die or a lower die so as to be movable up and down, and forming a pair of the press dies in a die device for pressing a work material such as a metal plate. A punch fixed to one of the bases, a die provided in the other mold that constitutes the pair of press dies, and a tip portion of the punch formed so that the tip can be inserted, and one of the molds to which the punch is fixed. And a plate provided with a distance from the base portion, the distance between the base portion when the upper die and the lower die constituting the pair of press dies are close to each other. A stripper plate having a through hole through which the tip of the punch can pass so that the tip of the punch protrudes from the side surface of the die of the plate and enters the die. Pre In DOO, together with the oil passage pressing oil is conducted is formed, the mold apparatus, wherein the injection holes extending from the oil passage is opened to the inner wall surface of the through hole.