JP2003200297A - Multistage forming die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save labor and time in exchanging a die, to economize on setting a press line, and to cope with forming of many kinds of products in small quantities. <P>SOLUTION: The invention relates to a multistage forming die to be mounted on a press performing various kinds of press working on a blank. The die is constituted of a plurality of unit dies that share such various kinds of press working and that are each made exchangeable with other unit dies carrying out a different press working. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing process and a forming process for a base plate such as a thin low carbon steel plate, a copper plate, and an aluminum plate which are sequentially fed by a roll feeder or the like in a fixed length unit. forming)
The present invention relates to a multi-stage molding die that is mounted on a press machine and used when a desired product is formed by sequentially performing press processing such as processing.

[0002]

7 to 9 show an example of a conventional multi-stage molding die. 7 is a side view thereof, FIG. 8 is a sectional view taken along line AA of FIG. 7, and FIG. 9 is a sectional view taken along line BB of FIG. Both are schematic views.

In FIG. 7, reference numeral 31 is an upper die attached to a slide of a press machine via an upper bolster 32, and 33 is a lower die attached to a bed of the press machine via a lower bolster 34. The conventional multi-stage molding die is composed of the upper die 31 and the lower die 33. P is a strip-shaped blank plate sequentially fed in the direction of the arrow by the roll feeder in units of the length L of the press stages S _{1 to} S ₅ described later on the lower die 33.

The upper die 31 has a structure that elastically absorbs or cushions the impact applied when the blank P is pressed onto the lower die 33 to be molded.

The base plate P is a plate material (hereinafter referred to as a base plate) to be pressed such as a thin low carbon steel plate, a copper plate, an aluminum plate.

As shown in FIG. 8, the upper die 31 and the lower die 33 have five press stages S _{1 to} S ₅ having the same length L and width W.
It is divided into.

The upper die 31 and the lower die 33 of each of the press stages S _{1 to} S ₅ press-form the blank plates P sequentially fed in units of the length L of the stages S _{1 to} S ₅ , The dies K _{1 to} K ₅ are formed by performing different press workings on them.

That is, as shown in FIG. 9, the die K ₁ is "drilled" by punching three round holes 35 in the base plate P,
In the die K _2, the blank P is “punched” in the slot 36.
The metal mold K ₃ is formed by "cutting" in which a U-shaped cut 37 is formed in the base plate P, and the metal mold K ₄ is formed by the cut 3 of the base plate P.
A "bending process" is performed in which the bending piece 38 of No. 7 is bent at a right angle downward at the broken line portion. The die K5 is subjected to "cutting" in which a notch 39 is formed in the base plate P, and the product is separated from the base plate P.

[0009]

According to the above-mentioned example, the conventional multi-stage molding die has a pair of upper and lower dies 31 and 33.
Is divided into five press stages S _{1 to} S ₅ and die K ₁ to
K ₅ is provided, and the desired product is formed by performing different press workings on the blank plates P sequentially fed by the length units of the stages S _{1 to} S ₅ with these molds, so that the same specifications are obtained. With the above product, molding can be performed efficiently.

However, if the specifications of the press work performed by _one die K ₁ among the press work performed by each die K _{1 to} K ₅ are changed, the upper die 31 and the lower die 33 are all removed from the press machine. , Only the mold K ₁ part has to be replaced with the other upper and lower molds with the new specifications. This is because only the mold K ₁ part cannot be replaced.

Therefore, there are the following problems. (1) It takes time and effort to replace the multi-stage molding die. (2) Only by partially changing the specifications of the press working, a multi-stage molding die for that purpose has to be newly manufactured, which results in a high die cost. (3) Since it takes time and labor to replace the mold and the mold cost is high, it is not possible to cope with the molding of a wide variety of products in small quantities. (4) If you are trying to mold a wide variety of products in small quantities,
Since it is necessary to prepare a multi-stage molding die for each product, the number of molding lines increases and a large equipment space is required.

The present invention aims to solve such a conventional problem.

[0013]

A multi-stage molding die provided by the present invention to achieve the above object is as follows.
It has the configuration described in (5) (hereinafter referred to as the first invention). (1) A plurality of press stages and at least one idle stage are divided into the same length and width and set in a line. (2) Each press stage is provided with a die for press-molding a base plate, which is sequentially fed in units of the length of the stage, with an upper die and a lower die, and subjecting each to different press workings. It is set up. (3) The dies arranged on each of the press stages are unit dies having one and / or two or more of them as constituent units. (4) Each unit die is composed of an upper die and a lower die that are biased by a spring to be held in an always open position, and can be relatively moved up and down by pressing and releasing the slider on the bed. In addition, the lower mold is removable from the bed. (5) With the configuration described in (4) above, each of the unit molds can be replaced with another unit mold that applies different press workings to the base plate.

Further, another multi-stage molding die provided by the present invention to achieve the above object is as follows (1) to (5).
It has the configuration described in (hereinafter referred to as the second invention). (1) A plurality of press stages and at least one idle stage are divided into the same length and width and set in a line. (2) Each press stage is provided with a die for press-molding a base plate, which is sequentially fed in units of the length of the stage, with an upper die and a lower die, and subjecting each to different press workings. It is set up. (3) A part of the molds arranged on each press stage is a unit mold having one and / or two or more molds among them as a constituent unit, and the rest is , A fixed mold consisting of an upper mold attached to a slider and a lower mold attached to a bed. (4) Each unit die is composed of an upper die and a lower die which are biased by a spring to be held at an always open position, and can be relatively moved up and down by pressing and releasing the slider on the bed. In addition, the lower mold is removable from the bed. (5) With the configuration described in (4) above, each of the unit molds can be replaced with another unit mold that applies different press working to the base plate.

The press working referred to in the first and second aspects of the invention involves shearing.
ring processing and forming processing.
This press working is performed in multiple stages on the raw plates that are sequentially fed.

The above-mentioned shearing includes, for example, punching, drilling, cutting, etc., and the forming includes, for example,
There are processes such as bending, drawing, and overhanging. The multistage molding in the present invention is performed by a combination of these processes.

The base plate referred to in the present invention is a thin low carbon steel plate,
It is a target material for shearing and forming such as copper plate and aluminum plate.

The products molded by the multi-stage molding die of the present invention are components such as cases and frames used in automobiles, vehicles, machines, electronic devices, audio equipment and the like.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
Embodiments will be described with reference to the drawings.

[0020]

Embodiment 1 FIGS. 1 to 3 show a multi-stage molding die according to an embodiment of the first invention. This multi-stage molding die is used for molding side plates of a car stereo case. 1 is a side view thereof, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. All are shown schematically.

In FIG. 1, U ₁ , U ₂ , and U ₃ are attached to the bed of the press machine through the lower bolster 1.
They are a first unit mold, a second unit mold and a third unit mold which will be described later. Reference numeral 2 is an upper bolster provided on the slide of the press machine. The multi-stage molding die of the example is
It is composed of these three unit dies U _{1 to} U ₃ .

The unit mold U ₁ is composed of an upper mold 3 and a lower mold 4, both of which are guided by four guide posts 5 and are held so as to be vertically movable relative to each other, and each guide post 5
The coil spring 6 fitted in the spring is urged by the spring and is always held in the open position. Holding in the open position is performed by a stopper pin (not shown).

The unit mold U ₁ is assembled with the upper mold 7 and the lower mold 8, and the unit mold U ₂ is assembled with the upper mold 9 and the lower mold 10 in the same configuration as the unit mold U ₁ , respectively.

P is fed onto the lower molds 4, 8, and 10.
It is a base plate. That is, the stage S described later₁~ S_Fiveof
First unit gold by roll feeder in units of length L
Type U ₁To the third unit mold U₃Will be sent to
It is a strip-shaped blank. The upper molds 3, 7, 9 are the lower molds of the blank plate P.
Impact applied when molding by pressing on 4, 8, 10
Is elastically absorbed or buffered.

The unit dies U _{1 to} U 3 are positioned on the lower bolster 1 at the flange portions 4 a, 8 a, 10 a of the lower dies 4, 8, 10 and are detachably attached to the bolster 1 by bolts. ing. Positioning is done by rocket pins.

Each of the unit dies U _{1 to} U ₃ is driven by a slide that moves up and down in synchronization with the movement of the blank P fed in units of the length L of the stage.

The unit dies U _{1 to} U ₃ are arranged in this order from the upstream side to which the blank P is fed to the downstream side, and have the same length L and width as shown in FIG. W first and second
Are divided into the idle stages I ₁ and I ₂ and the first to fifth press stages S _{1 to} S ₅ .

The first and second press stages S ₁ and S ₂ are set on the first unit mold U ₁ , and the third and fourth press stages S ₃ and S ₄ are on the second unit mold U 1. ₂ is set and the fifth press stage S ₅ is the third unit mold U ₃
Is set to. The first idol stage I ₁ is the first
And the second unit mold U ₁ , U ₂ , and the second idle stage I ₂ is the second and third unit mold U ₂ ,
It is set during U ₃ .

The set first to fifth press stages S
_{1 to} S ₅ are provided with dies K _{1 to} K ₅ that perform different press workings on the fed raw plate P, respectively.

Among these molds K _{1 to} K ₅ , the mold K ₁ ,
K ₂ is composed of an upper mold 3 and a lower mold 4, molds K ₃ and K ₄ are composed of an upper mold 7 and a lower mold 8, and a mold K ₅ is composed of an upper mold 9 and a lower mold 1.
It is composed of 0 and.

Therefore, the first unit mold U ₁ has 2
It is a composite mold with _two molds K ₁ and K ₂ as its constituent units.
The unit mold U ₂ is a composite mold having two molds K ₃ and K ₄ as constituent units. The third unit mold U ₃ is a single mold having one mold K ₅ as a constituent unit.

As shown in FIG. 3, the die K ₁ is attached to the base plate P by 3
"Drilling" is performed to make _two round holes "a", and the die K2 is "punching process" of the elongated hole b in the base plate P. The metal mold K ₃ is "cut" in which a U-shaped cut c is made in the base plate P.
The mold K ₄ is subjected to “bending” in which the three bent pieces d of the notch c of the base plate P are bent downward at right angles at the broken line portion. The die K ₅ is a "cutting process" in which a notch e is made in the base plate P
Then, the product is separated from the base plate P.

FIG. 4 shows the first unit mold U shown in FIG.
Replace ₁ and shows a fourth unit mold U ₄ to be used. This unit mold U ₄ has a base plate P as shown in FIG. 4 in place of the mold K ₂ for punching the elongated hole b in the base plate P on the _second press stage S ₂ of the first unit mold U ₁ . A metal mold K ₆ for punching the three round holes f shown is provided. Other configurations are the first
It is the same as the unit mold U ₁ of.

FIG. 5 shows the second unit mold U shown in FIG.
₂ replaced by a shows the unit mold U ₅ of the 5 to be used. This unit mold U ₅ is the third unit mold of the second unit mold U ₂ ,
The fourth press stages S ₃ and S ₄ are provided with molds K ₇ and K ₈ instead of the molds K ₃ and K ₄ .

As shown in FIG. 5, the die K ₇ is a die for making a notch h having four bending pieces g in the base plate P, and the die K ₈ has the four bending pieces g. It is a mold that is bent downward at a right angle at the broken line. Other configurations are the same as those of the _second unit mold U ₂ .

The fourth and fifth unit dies U ₄ and U ₅ are composed of the first and second units, which are used when part of the press working of the blank P is changed or when part thereof is changed. It is used by replacing the molds U ₁ and U ₂ . Although not shown, a replacement unit die can be prepared for the third unit die U ₃ in preparation for a change in press working.

Since the multi-stage molding die of the first embodiment has the above-described structure, it is driven by the base plate P sequentially fed in units of the length L of the stage in accordance with the timing of its movement. Different press workings can be performed by the _five molds K _{1 to} K ₅ to continuously form the desired product.

Then, for example, the second press stage S
_When the long hole b punched out in ₂ is changed to three round holes 5, the press line can be easily changed by replacing the first unit mold U ₁ with the fourth unit mold U ₄ .

Further, for example, the third press stage S3
The cut e with the three bent pieces d
When changing to a notch h having one bent piece g, and accordingly bending the four bent pieces g on the fourth press stage S ₄ , the second unit mold U ₂ The press line can be easily changed by replacing the press line with the fifth unit U ₅ .

[0040]

[Embodiment 2] FIG. 6 shows a multistage molding die according to an embodiment of the second invention. This mold is used for molding a side plate of a car stereo case, as in the first embodiment. FIG. 6 is a side view of the die and corresponds to FIG. 1.

In the multistage molding die of the second embodiment, the first unit die U ₁ and the third unit die U ₃ of the first embodiment are fixed dies.

That is, the first unit mold U₁Oke
Upper mold 3 to the upper bolster 2, lower mold 4 to the lower bolster 1,
Each is installed. Also, the third unit money
Type U ₃The upper mold 9 in the above is the upper bolster 2 and the lower mold 10 is the lower
Each is attached to the bolster 1. Above mold
3 and lower mold 4 and upper mold 9 and lower mold 10 are all made of one piece of gold.
Mold, that is, not configured as a unit mold. So
Other configurations are the same as in the first embodiment. Therefore, the same
The same reference numerals are attached to a part.

The mold of Example 2 is the second unit mold U.
₂Can be exchanged, so press work change in this part
Will be easier. Therefore, the mold of Example 2 is
Unit mold U₂Pressing performed in, that is, the third,
Fourth press stage S₃, S _FourChanges in press processing
Suitable for molding that requires only one.

[0044]

As described above, according to the present invention, a die for sequentially performing various types of press working on a base plate in a stepwise manner is composed of a plurality of unit dies that share the various types of press working. Since the respective unit dies are configured to be replaceable with other unit dies that share a different press working, the following effects can be obtained. (1) If there is a partial change in the press working of the blank,
Since it is only necessary to replace the unit mold of that part, it does not take time and effort to set up the press line corresponding to the new specifications. (2) If there is a partial change in the press working of the blank,
Since it can be replaced with another unit mold that can handle that part, setting up a new press line does not cost much. (3) For the same reason as (2), it is possible to easily cope with the molding of a wide variety of products in small quantities. (4) Since a new press line does not have to be set up every time a partial change occurs in the press working of the blank plate, a large equipment space is not required.

[Brief description of drawings]

FIG. 1 is a side view of a multi-stage molding die according to a first embodiment.

2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a plan view of a replacement unit mold.

FIG. 5 is a plan view of a replacement unit mold.

FIG. 6 is a side view of the multi-stage molding die according to the second embodiment.

FIG. 7 is a side view of a conventional multi-stage molding die.

8 is a sectional view taken along line AA of FIG.

9 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

_{U 1, U 2, U 3} , U 4, U 5 first to fifth unit die 1 lower bolster second upper bolster 3, 7, 9 upper mold 4, 8, 10 lower mold 4a, 8a, 10a flange portion 5 Guide Post 6 Coil Spring P Base Plates S _{1 to} S ₅ 1st to 5th Press Stages I ₁ and I ₂ 1st and 2nd Idle Stage L Length W Widths K _{1 to} K ₈ Molds a and f 3 round holes b oblong holes c U-shaped notches d 3 bent pieces e, h notches g 4 bent pieces

Claims (2)

[Claims] 1. A plurality of press stages and at least one idle stage are divided into the same length and width and set in a line, and each press stage is sequentially fed in units of the length of the stage. A die for press-molding the plate with an upper die and a lower die and performing different press workings on each is arranged, and the die arranged on each of the press stages is one of them and / or Alternatively, it is a multi-stage molding die which is a unit die having two or more dies as constituent units, wherein each of the unit dies is spring-biased to be held in an open position at all times on a bed. It is composed of an upper mold and a lower mold that can move up and down relative to each other by pressing and releasing the pressure by sliding, and the lower mold can be attached to and detached from the bed, and can be replaced with other unit molds that perform different press working on the base plate. Is characterized by Multi-stage molding die. 2. A plurality of press stages and at least one idle stage are divided into the same length and width and set in a line, and each press stage is sequentially fed in units of the length of the stage. The plate is pressure-molded by an upper mold and a lower mold, and dies for performing different press workings are respectively arranged on the plate. A part of the dies arranged on each press stage is It is a unit mold having one and / or two or more molds as a structural unit, and the rest is a fixed mold composed of an upper mold attached to a slider and a lower mold attached to a bed. In the multi-stage molding die, each of the unit dies is biased by a spring to be held in an always open position, and an upper die that can be relatively moved up and down by pressurizing by sliding on the bed and releasing it. Consists of a lower mold and a lower mold The multi-stage molding die is characterized in that it can be attached to and detached from the bed and can be replaced with other unit dies that perform different press working on the base plate.