JPS63242424A - Multiblank blanking die and its manufacture - Google Patents

Abstract

PURPOSE:To reduce die cost and to improve working efficiency by forming a punch member and die member by dividing them with plural co-axial cylindrical members respectively. CONSTITUTION:A punch supporting base 12 is arranged by fixing it to a die base P10 and the punch P18 composed of a reference punch 14, an outside retainer P16 and plural split cylindrical bodies is arranged on the supporting base 12. Meanwhile, a die supporting base D12 is fixed to the die base D10 and the die D18 consisting of a reference die D14, inner side retainer D16 and plural cylindrical bodies is respectively set up on the supporting base D12. In the case of blanking a blank of same outer diameter, the specified number of split cylindrical bodies P18 are drawn from the large diameter side of a punching die P so as to obtain the diameter of the die P conforming thereto and the dies P, D are formed by drawing the specified number of split cylindrical bodies D18 from the small diameter side of the die D. Since the die is formed with the combination of the punch and die members, the die cost is reduced and working efficiency is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multi-type blank punching mold and a manufacturing method thereof, and is particularly suitable for preparing a blank as a material for drawing and forming for various prototypes. The present invention relates to a multi-type blank punching mold and a manufacturing method suitable for easily producing such a mold.

[Prior Art] Conventionally, such a blank punching die punches a blank of a predetermined shape from a plate-shaped material using a combination of a male-shaped integrated punch and a female-shaped integrated die. It has been known.

[Problems to be Solved by the Invention] However, even when obtaining a small number of blanks with many different diameters, such as blanks for prototyping, a punch having a diameter that matches the types of blanks with different diameters is required. It was necessary to prepare a combination of dies and dies, and obtain blanks for each.

Therefore, in order to obtain a small number of blanks, many types of punching dies are required, which increases production costs.
The waste of storage space was also a problem that could not be ignored.

An object of the present invention is to solve these conventional problems and to provide a die for punching various types of blanks, which is inexpensive and does not require storage space.

Another object of the present invention is to provide a method for manufacturing a multi-species blank punching die, which makes it possible to manufacture such a multi-species blank punching die extremely efficiently.

[Means for Solving the Problems] In order to achieve the above object, in a first form of the present invention, in a punching die provided with a punch member and a die member, the punch member and the die member are arranged in a plurality of concentric shapes. It is characterized by being formed by dividing into cylindrical members.

In the second embodiment of the present invention, two disc-shaped members for punches or dies are prepared, each of the two disc-shaped members is divided into concentric cylinders having mutually different diameters, and each of the divided disc-shaped members is The split disc-shaped members are held between two jig plates, each of the sandwiched disc-shaped members is cut together with one of the jig plates, concentric cylindrical members are cut out, and the cut-out concentric cylindrical members are combined with each other to form a punch member. Alternatively, it is characterized by forming a die member.

Note that in this specification, the term "circle" is used with the concept that it includes not only perfect circles but also deformed circles such as ellipses.

[Function] According to the first embodiment of the present invention, in order to obtain a blank with a predetermined diameter, a predetermined number of concentric cylindrical members on the large diameter side are removed from the punch member, and a predetermined number of concentric cylindrical members on the large diameter side are removed from the punch member, and By removing a predetermined number of concentric cylindrical members on the small diameter side,
A punching die can be formed to match the diameter of the blank, thereby easily punching a blank of a predetermined diameter.

According to the second embodiment of the present invention, two disc-shaped members are prepared for each use, one for punch and one for die. Then, each of the two disc-shaped members is divided into concentric cylinders having mutually different diameters by, for example, wire electric discharge machining.

Thereafter, each of the divided disc-shaped members is sandwiched between two jig plates, and cut together with one of the jig plates using a lathe or the like in this state to cut a concentric cylindrical member of a predetermined shape and size. put out. In this way, since there is no need to set each concentric cylinder in a processing machine, it is possible to obtain a punch member or die member that is extremely accurate and free from distortion.

A punch member or die member is formed by combining two sets of concentric cylindrical members cut out as described above.

The punch member or die member thus obtained is set and used as described in the first embodiment.

[Implementation row] Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, P is a punch mold, D is a die mold, and the cross section of the left half with respect to the center line is shown. The punch die P includes a die base P10 and this die base PI.
A punch support base P12 whose tightening is fixed by a fixing means such as a bolt at O, an annular step P12A provided on this punch support base P12 &: a reference punch P14 into which the bottom peripheral part is fitted;
It has an outer retainer P16 that is fastened to the punch support base P12 by fixing means such as bolts, and a punch P18 that is divided into a plurality of concentric cylinders.

The mold base P10, the punch support base P12, and the inner retainer P14 each have holes PIO^, PL2B, and P14B for attaching tools, which will be described later, in their centers.

The punch P1B, which is divided into a plurality of cylindrical bodies, is each formed to have the same cross-sectional shape in the radial direction, and has an annular recessed step P18^ on the lower side in the drawing to prevent the punch from being pulled out.
and an annular convex step portion P18B. This annular concave step P18^ is connected to the annular convex step P1 of the adjacent punch.
8B, and the annular recessed step P18A of the innermost punch
fits into the annular convex step P14A of the reference bunch P14, and the annular convex step P18B of the outermost punch fits into the outer retainer P.
It fits into the annular recessed step pHi^ of No. 18.

Therefore, this outer retainer P16 is attached to the punch support base P12.
By fastening with bolts or the like, the annular convex stepped portion P18B of the outermost punch functions as a pull-out stop.

However, in this embodiment, the punch P18 is approximately 5 inches long.
It consists of 20 divided cylindrical bodies with a thickness of . Note that a button die P22 is further fitted inside the reference bunch P14.

On the other hand, the die mold includes a mold base D1o, a die support D12 which is fixed to the mold base 010 by fixing means such as bolts, and an annular flat groove D12A provided in the die support [112]. A reference die D14 whose bottom part is fitted and fastened with a bolt or the like, an inner retainer [116] whose tightening is fixed to the die support base 012 by a fixing means such as a bolt, and a die [118] which is divided and formed into a plurality of cylinders. has.

Note that the mold base D10, the die support stand 012, and the inner retainer [116 each have holes DIOA, DI2B, and 016A for attaching tools, which will be described later, in their centers.

The die I) 18, which is divided into cylindrical bodies, is formed to have the same cross-sectional shape in the radial direction, similarly to the punch P18 described above, and has an annular recessed step D on the upper side in the drawing.
18A and an annular convex step D18B. The annular concave step portion 018 is fitted with the annular convex step portion DI8B of the adjacent die, and the annular convex step portion DI8B of the innermost die is fitted.
B fits into the annular recessed step 016^ of the inner retainer 016.

Therefore, by fastening this inner retainer D1B to the die support base 012 with bolts or the like, the annular convex stepped portion D18A of the innermost die functions as a pull-out stop.

However, the die 018 is approximately 5a+m similar to the punch P1B.
It is composed of 21 divided cylindrical bodies with a thickness of There is.

In addition, P2O and 020 are respectively outer retainers P
This is a stripper made of urethane rubber or the like that is attached to the upper surface of 1B and the inner retainer DIS.

Next, the mode of use of one embodiment of the present invention having the above structure will be explained with reference to FIG.

First, when punching a blank with a certain outer diameter, a predetermined number of split cylindrical bodies P18 are extracted from the large diameter side in order to obtain the diameter of the punch die P that matches the diameter, and an outer retainer P1B that matches the dimensions is attached to the punch support base P12. Tighten to secure the punch. On the other hand, in die molding, a predetermined number of divided cylindrical bodies D18 are extracted from the small diameter side, and an inner retainer D16 that matches the dimensions thereof is tightened to the die support base 012 to fix the die.

Then, a workpiece is placed between the two molds and punched to obtain a blank B.

Therefore, blanks of various diameters can be easily obtained by varying the number of divided cylindrical bodies extracted from the punch and die.

Note that this figure shows the state in which the blank has been punched out, and when the die is pulled upward, the blank B and the waste material B1 are automatically removed from the mold by the elastic force of the strippers P20 and 020, respectively. It comes off.

Next, a second usage mode for obtaining a blank with locating holes using the blank punching die according to the present invention will be explained using FIG. 4.

In this example, the tool mounting hole DIOA of the die mold,
Pierce punch D22 is inserted through D12B and D18A and fixed to die base D10. Further, a stripper D24 is arranged around this pierce bunch D22.

The configuration other than this is the same as previously described in FIG. 3. When punching is performed under such a combination, a blank B having a predetermined diameter is obtained as described above, and a locate hole is punched in the center using the pierce bunch D22 and the button die P22.

Furthermore, the embodiment shown in FIGS. 5 and 6 is for making it possible to form a blank with a smaller diameter than the embodiment shown in FIGS. 1 and 2, and the punch mold P
In this case, a divided cylindrical punch P18A, a small punch P14B with a smaller diameter than the reference punch P14, and a locate pin P14 are provided in place of the reference punch P14 shown in the first diagram.
G is shown in FIG. 5, and in the die molding, a split cylindrical die 0188 provided in place of the inner retainer D16 shown in the first drawing, a small diameter inner retainer DI6B, and a retainer support cylinder 016C are shown in FIG. show.

The examples shown here may be rearranged and used as necessary.

Next, the above-mentioned punch member P18 and die member 018
An example of the manufacturing method will be explained based on FIGS. 7 to 12.

As shown in FIG. 7, first, two disk-shaped members Pi, P2゜DI, D2 are used for the punch and the die.
Prepare. Die steel or the like is used as this material. This disc-shaped member PI, P2,01. D2 is a cross-shaped protrusion PIA and P2A for preventing rotation in the diametrical direction.

It is equipped with DI^ and D2A respectively. The disk-shaped members PI and DI are connected to the other disk-shaped members P2. The radius corresponding to half the thickness of the cylindrical member described above is set larger than D2.

Next, as shown in FIG. 8, small holes PIB, PIB, . . . for wire cut electrical discharge machining are drilled in the disc-shaped member PI (representatively only the disc-shaped member P1 is shown). Thereafter, heat treatments such as quenching and tempering are performed as necessary to strengthen the member. 2. After that, as shown in Fig. 9, concentric cylinders pLI and pi are formed by wire-cut electric discharge machining.
-2,..., PI-n. This divided disk-shaped member P1 is first held between two jig plates A and B as shown in Fig. 1θ. Along with having A1,
The outer circumferential portion has an outer circumferential wall A2 having a height equivalent to the plate thickness of the disc-shaped member P1, and this outer circumferential wall A2 and the jig plate B are fastened together with bolts or the like.

In this state, first, the innermost cylindrical member Pi-
Cutting the inner peripheral part of n. As shown in an enlarged view on the right side, a part of the jig A and the jig B are cut together over the entire inner circumferential portion, and an annular recessed step PL-nA is further cut and formed together with the jig B. This cut portion is indicated by diagonal lines. Cylindrical member P
After completing the inner diameter cutting for I-, jig B
When the inner circumference of the next cylindrical member pt-n-+ is reached, the cylindrical member Pi- is removed, and then the inner diameter of the cylindrical member px-o- is cut as described above. Follow the same steps as above.

When the inner diameter cutting of all the cylindrical members is completed in this way, as shown in FIG. A jig C having a platform C2 with a height corresponding to the plate thickness of
and a jig E to clamp the disc-shaped member P1. At this time, there will be a gap between each cylindrical member PI-, PI-2, ... due to the inner diameter cutting, but the cross-shaped protrusion PIA and the anti-rotation groove prepared in advance will exist. A predetermined positioning is achieved by engagement with C1.

In this state, first, the outermost cylindrical member P1.
−+ External diameter cutting is performed. In this case as well, cutting is performed together with the jig C, and after first forming the annular convex step portions PI- and B, cutting of the outer peripheral portion is performed. The cut portion is indicated by diagonal lines.

In this way, all cylindrical members pt-,, pt-,
.

When the outer cutting of Pi- is completed, a disc-shaped member pt is obtained in which the wall thickness of each cylindrical member PI-n and the gap are equal to each other.

Next, regarding the disc-shaped member P2, the disc-shaped member P2 described above is also described.
When processing is performed using the same procedure as described in Section 1, individual cylindrical members P2. ．． A disc-shaped member P2 having the same wall thickness n and the same gap is obtained. However, since these disc-shaped members P1 and P2 had different diameters corresponding to half of the wall thickness of the individual cylindrical members as described above, when these two are combined, the diameter of the disc-shaped member PI is different. One punch member P18 is formed by fitting the cylindrical portion of the disc-shaped member P2 into the gap and complementing each other. Therefore, as shown in FIG. 12, both end faces of the punch member P18 are ground to obtain the final punch member P18. Note that the manufacturing method completely similar to the manufacturing method described for the punch member P18 is also applied to the die member [118].

[Effects of the Invention] As is clear from the above description, according to the first embodiment of the present invention, blanks of various predetermined dimensions can be obtained easily by simply changing the combination of the punch member and the die member. Since a punching mold of a predetermined diameter can be formed, the cost can be extremely low compared to manufacturing the molds individually.

Further, according to the second embodiment of the present invention, since the cutting process is performed while being held in a jig, the number of man-hours required for the set is reduced compared to processing the cylindrical members constituting the punch or die individually. This is advantageous in terms of dimensional errors and can be manufactured efficiently.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a plan view showing a punch die in the lower half and a die die in the upper half, and Fig. 3 is a diagram showing the use of the embodiment of the present invention. 4 is a sectional view for explaining another embodiment of the present invention, FIG. 5 is a sectional view for explaining another embodiment of the punch, and FIG. 6 is a sectional view for explaining another embodiment of the punch. A cross-sectional view showing another embodiment of the die, FIG. 7 is a cross-sectional view showing the preparation state of the disk-shaped member, FIG. 8 is a perspective view showing the disk-shaped member for punching, and FIG. 9 is a division into concentric cylinders. A cross-sectional view and a perspective view of a disc-shaped member to explain the process, FIG. 1O is a cross-sectional view of the disc-shaped member to explain the inner diameter cutting process, and FIG. FIG. 12 is a cross-sectional view of the punch member for explaining the process of grinding both end faces. P...Punch mold, D...Die mold, Pi2...Punch support base, Pi4...Reference punch, Pi6...Outer retainer, Pi8...Punch member, 012...Die Support stand, DI4...Reference die, 018...Inner retainer, DI8...Die member, Pi, P2...Disc-shaped member for punch, DI, D2...
・Disc-shaped member for die. A, B, C, E...jigs. Figure 1 Figure 5 Figure 7 Figure 9

Claims (2)

[Claims] (1) A multi-type blank punching mold comprising a punch member and a die member, characterized in that the punch member and die member are divided into a plurality of concentric cylindrical members. (2) Prepare two disc-shaped members for a punch or die, divide each of the two disc-shaped members into concentric cylinders with mutually different diameters, and divide each of the divided disc-shaped members into two disc-shaped members. Clamp them between jig plates, cut each of the clamped split disk-shaped members together with one of the jig plates to cut out concentric cylindrical members, and combine the cut concentric cylindrical members with each other to form a punch member or A method for manufacturing a multi-type blank punching die, the method comprising forming a die member.