JPH09239457A - Deep drawing method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an intermediate product having high working degree by pushing the outer ridge of the intermediate product with a punch having a shrinkable mechanism in the radial direction in this working end along an inclining part arranged in a die. SOLUTION: The outer ridge 11a of a work having outward opening shape (the intermediate product) 11 is pushed with the punch 22 having the shrinkable mechanism in the radial direction in the working end 24 of the punch along the inclining part 21 arranged in the die 20. At the same time, the force is developed in the pushing direction of the outer ridge 11a along the inclining surface 21 of the die 20 by moving in the shrinking direction toward the center of die 20 on a line segment crossing at the right angle to the direction of the press. By this method, a redrawing work of a disk blank 10 can be executed with two processes of a first drawing and a second drawing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep drawing method and apparatus for drawing or redrawing a deep drawn product or a high draw ratio component.

[0002]

2. Description of the Related Art Conventionally, a deep drawing method or a redrawing method for forming a seamless bottomed container from a flat blank has been widely used as a mass production method in which a press drawing method using a press and a die is most suitable. ing. FIG.
FIG. 6 is an explanatory diagram showing a conventional redrawing process.

From φ100 disc blank 1 to deep drawn product 5
In order to obtain, the practical limit drawing of deep drawn steel plate is 0.55
Since it is ˜0.60, first, after passing through the first drawing (drawing ratio = 55/100 = 0.55) for obtaining the cylindrical cup-shaped product 2 of φ55 from the disk blank 1 of φ100, redrawing is performed. The practical limit of redrawing of deep drawn steel sheet is 0.75
Since it is 0.80, from the first diaphragm to the fourth diaphragm, while maintaining this practical limit diaphragm = 0.75 to 0.80, the cylindrical cup-shaped product 2 of φ55 to the cylindrical cup-shaped product of φ41 of the first diaphragm The second diaphragm (drawing ratio = 41/55 = 0.
75), and a third diaphragm (cylindrical ratio = 31/41 = 0.7) that changes the cylindrical cup-shaped product 3 of φ41 into the cylindrical cup-shaped product 4 of φ31.
5), φ31 cylindrical cup-shaped product 4 to φ23 deep-drawn product 5
4th diaphragm (drawing ratio = 23/31 = 0.75)
Two drawing processes were required.

FIG. 22 is an explanatory view showing redrawing of a conventional flanged component. Also in this case, similarly to FIG. 21, the disk blank 1 was subjected to the first drawing (drawing ratio = 55/100 = 0.55) to obtain the flanged component 6 of φ55 based on the practical drawing drawing of the deep drawn steel plate. Then re-squeeze. Φ of the first diaphragm (drawing ratio = 55/100 = 0.55)
The second drawing (drawing ratio = 41/55 = 0.7) from the flanged component 6 of 55 to the flanged component 7 of φ41.
5), a third aperture stop having the φ7 flanged component 7 as the φ31 flanged component 8 (drawing ratio = 31/41 = 0.
75), and a fourth diaphragm (reduction ratio = 23/31 =) in which the flanged component 8 of φ31 is replaced with the flanged component 9 of φ23.
It required four drawing steps of 0.75).

[0005]

As shown in FIG. 21 and FIG. 22, in the conventional deep-drawing method, a deep-drawing product or a high-drawing ratio component cannot be obtained unless multi-steps are required as a result of the practical limit drawing. I couldn't get it. Moreover, FIG.
In the case of the conventional deep-drawing product 5 shown in FIG. 1, a so-called shock line is generated in the cylindrical portion as shown in the conventional product of FIG. That is, the hardness distribution in the vertical direction of the cylindrical portion repeats hard and soft.

Further, in the conventional flanged component shown in FIG. 22, shock lines are generated in the flange portions 7a, 8a, 9a as shown in the second to fourth apertures. That is, the hardness distribution in the radial direction of the flange portion is repeatedly hard and soft. The present invention has been made to solve such conventional problems, and an object thereof is to provide a deep drawing method and an apparatus therefor capable of obtaining an intermediate step product or part having a high working degree with a small number of working steps. Especially.

[0007]

According to a first aspect of the present invention, in a deep drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided on a die, the outer edge of a deformed product or an intermediate product is It is characterized in that an intermediate step product or a component is obtained by pushing the work end along a slanted portion provided on the die with a punch having a mechanism capable of contracting in the radial direction.

According to a second aspect of the present invention, in a deep drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided in a die, the work material is appropriately broken within a central portion of the work material. Punch with a mechanism that allows the working edge to be contracted in the radial direction along the inclined part provided on the die while pressing with the second punch adjusted to various working forces, along the outer edge of the deforming product or the intermediate process product. It is characterized in that an intermediate process product or part is obtained by pressing with.

According to a third aspect of the present invention, in a deep drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided on the die, the outer edge of a deformed product or an intermediate process product is provided on the die. At the same time as the work end is pushed by a punch having a mechanism capable of contracting in the radial direction along the inclined portion, a second force adjusted to an appropriate action force within the range where the work material does not break at the center of the work material It is characterized in that an intermediate process product or a part is obtained by pushing with a punch of.

A fourth aspect of the present invention is a deep drawing apparatus having a punch mechanism in which a working end can be radially contracted along an inclined portion provided on the die according to any one of the first to third aspects. In the mechanism of the punch, the working end of which can be contracted in the radial direction along the inclined portion provided in the die, the punch piece is divided into three or more pieces in the circumferential direction and each of the punch pieces has an appropriate gap. It is characterized in that it is attached so as to be horizontally movable in the radial direction.

A fifth aspect of the present invention is a deep drawing apparatus having a punch mechanism in which a working end can be radially contracted along an inclined portion provided on the die according to any one of the first to third aspects. In the mechanism of the punch, the working end of which can be contracted in the radial direction along the inclined portion provided in the die, the punch piece is divided into three or more pieces in the circumferential direction and each of the punch pieces has an appropriate gap. It is characterized in that it is mounted rotatably in the radial direction on the side opposite to the working end.

A sixth aspect of the present invention is a deep drawing apparatus having a punch mechanism in which a working end can be radially contracted along an inclined portion provided on the die according to any one of the first to third aspects. In the punch mechanism, the working end of which can be contracted in the radial direction along the inclined portion provided on the die has an appropriate width in a direction that equally divides the circumference from the working end of the punch toward the opposite end side. The present invention is characterized in that three or more slits are provided, and a part of the opposite end side is allowed to be displaced in the radial direction only by the working end of one punch which is connected while being elastically bent.

(Operation) Claim 1, Claim 4, Claim 5,
According to the invention of claim 6, the outer edge of the deformed product or the intermediate process product is pushed by a punch having a mechanism in which the working end can be radially contracted along the inclined portion provided on the die, whereby the height is increased at once. It is possible to obtain an intermediate process product or part having a high degree of processing.

According to the second, third, fourth, fifth and sixth inventions, the outer edge of the deformed product or the intermediate process product is worked along the inclined portion provided on the die. At the same time as pressing with a punch that has a mechanism that allows the end to contract in the radial direction, at the same time as pressing with a second punch adjusted to an appropriate acting force within the range where the specific processed material does not break in the center of the processed material, By the synergistic effect of, it is possible to obtain intermediate process products or parts with high workability all at once.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the deep drawing method according to claim 1. In this embodiment, a case will be described in which a deep-drawn product 12 of φ23 is obtained similarly to the deep-drawn product 5 by the fourth drawing in the conventional deep drawing method shown in FIG.

In order to obtain a deep drawn product 12 from a disk blank 10 of φ100, the practical limit drawing of a deep drawn steel plate is 0.5.
Based on 5 to 0.60, first, a die (not shown) having an inclined surface corresponding to the inclined surface 21 of the die 20 shown in FIG. 1st diaphragm with 11 (drawing ratio = 75/1
00 = 0.75).

Next, a deep-drawn product 12 having the same diameter as the deep-drawn product processed by the conventional fourth drawing is obtained from the processed product 11 having the outward opening shape of φ75. This aperture ratio is 23/75 = 0.30. In this second drawing, as shown in FIG. 2, the outer edge 11a of the processed product 11 having the outer diameter of φ75 of the first drawing is punched along the inclined portion 21 provided on the die 20 at the punch working end 2.
4 is pushed by the punch 22 having a mechanism capable of contracting in the radial direction, and at the same time, the inclined surface 21 of the die 20 is moved by the movement in the direction of contracting on the line segment orthogonal to the direction of the press toward the center of the die 20. As a result, a force was generated in the direction of pushing the outer edge 11a, and the force was pushed into the hole 23 in the central portion of the die 20, and a deep-drawn product 12 with high workability could be obtained all at once.

As described above, according to the present embodiment, the outer edge 11a of the processed product (intermediately processed product) 11 having the outer opening shape is attached to the die 2
At the same time as the punch working end 24 is pushed by the punch 22 having a mechanism capable of contracting in the radial direction along the inclined portion 21 provided at 0, the die 20 is moved along the line segment orthogonal to the direction of the press.
The die 20 moves due to the contracting movement toward the center of the die 20.
As a result, a force is generated in the direction in which the outer edge 11a is pushed along the inclined surface 21 of the disk blank 10. Therefore, the redrawing process of the disk blank 10 (see FIG. 21), which conventionally requires four steps, is performed using the first drawing and the second drawing. This can be done in two steps.

FIG. 3 shows an embodiment of the deep drawing method according to claim 2 or claim 3. In this embodiment, FIG.
A case of obtaining a deep-drawn product 12 of φ23 similarly to the deep-drawn product 5 by the fourth drawing in the conventional deep drawing method shown in 1 will be described. In this embodiment, a deep drawn product 13 equivalent to the deep drawn product 12 of FIG. 1 is obtained from the disc blank 10 at once.

Therefore, in this embodiment, as shown in FIG. 4, in addition to the punch 22 shown in FIG. 2, a second punch 25 is added on the axis of the hole 23 at the center of the die 20. . Therefore, the disc blank 10 placed on the die 20
Is pressed by the second punch 25 in the direction of the die 20 to form an intermediate process product 14 having a shape similar to the outwardly-opened processed product 11 shown in FIG. After that, the outer edge 14a is pushed in, and thereafter, the center portion of the intermediate step product 14 is pushed into the hole 23 in the center portion of the die 20 by the second punch 25 to be a deep-drawing product 13 with a high degree of workability. It

As described above, according to this embodiment, the disc blank 10 is pressed in the direction of the die 20 by the second punch 25, and the intermediate product having the same shape as the processed product (intermediately processed product) 11 having the outward opening shape is formed. Processed product 14 and its outer edge 14a is die 20
At the same time as the punch working end 24 is pushed by the punch 22 having a mechanism capable of contracting in the radial direction along the inclined portion 21 provided at the same time, it contracts toward the center of the die 20 on the line segment orthogonal to the direction of the press. The movement of the die 20 causes a force in the direction of pushing the outer edge 11a along the inclined surface 21 of the die 20, and the pressing force of the second punch 25 causes the central portion of the intermediate step product 14 to move to the center of the die 20. Hole 2
Since it is pushed into 3, the re-drawing process (see FIG. 21) of the disk blank 10 which has conventionally required four steps can be performed in one step.

FIG. 5 shows the hardness distribution of the deep-drawn product 13 obtained according to this embodiment. In this deep drawn product 13, there is no so-called shock line in the cylindrical portion. That is, the hardness distribution in the vertical direction of the cylindrical portion only gradually changes gradually, and hard and soft are not repeated.

On the other hand, in the case of the conventional deep-drawing product 5 shown in FIG. 21, a so-called shock line is present in the cylindrical portion as shown in the conventional product of FIG. That is, the hardness distribution in the vertical direction of the cylindrical portion repeats hard and soft. In the embodiment shown in FIG. 3, the case where the deep-drawn product 13 is obtained from the disk blank 10 in one step has been described, but the outward-opened processed product 11 shown in FIG. 1 may be used. In this case, during the drawing process shown in FIG.
3 will be pressed on the axis.

FIG. 6 shows another embodiment of the deep drawing method according to claims 1 to 3. In this embodiment, the flanged member 1 of φ23 is similar to the flanged member 9 by the fourth drawing in the conventional deep drawing method shown in FIG.
A case of obtaining 5 will be described. In order to obtain the flanged member 15 from the disc blank 10 of φ100, first, an inclination corresponding to the inclined surface 21 of the die 20 shown in FIG. By using a die (not shown) having a face, a disc blank 10 of φ100 to a workpiece 11 having an outward opening shape of φ75 (see FIG. 1).
The same as the above), the first diaphragm (drawing ratio = 75/100 = 0.
75).

Next, similarly to FIG. 2, the outer edge 11a of the φ75 outer-opening shaped workpiece 11 of the first drawing is connected to the inclined portion 2 provided on the die 20.
1, the punch working end 24 is pushed by the punch 22 having a mechanism capable of contracting in the radial direction, and at the same time, the punch working end 24 is contracted toward the center of the die 20 on the line segment orthogonal to the direction of the press. As a result, a force is generated along the inclined surface 21 of the die 20 in the direction of pushing the outer edge 11a, and the force is pushed into the hole 23 at the center of the die 20 to obtain the processed product 16.

Next, the processed product 16 could be flanged to form the flanged component 15. As described above, according to the present embodiment, since the flange processing is performed after the processed product 16, the shock line is not generated in the flange 17. FIG. 7 shows another embodiment of the deep drawing method according to claims 2 and 3. In this embodiment, a case will be described in which a flanged member 15 of φ23 is obtained similarly to the flanged member 9 by the fourth drawing in the conventional deep drawing method shown in FIG.

In the present embodiment, the second blank 25 is used without forming the workpiece 11 having the outer opening shape shown in FIG.
Was processed, and finally the processed product 16 was flanged to obtain a flanged component 15. Also in this embodiment, since the flange 16 is processed after the processed product 16, the flange 17 is processed.
There is no shock line.

8 to 10 show an embodiment of the deep drawing apparatus according to claim 4. Here, FIG. 8 is a view of the deep drawing apparatus according to the present embodiment as viewed from below. Reference numeral 20 denotes a die, and the die 20 is provided with an inclined portion 21 and a hole 23 at the center. Reference numeral 30 represents a punch mechanism. The punch mechanism 30 is provided with a punch working end 3 along the inclined portion 21 of the die 20.
6 has a structure capable of contracting in the radial direction, and is provided with an annular base 31 having a through hole 32 in the center and an appropriate gap divided into 14 in the base 31 in the circumferential direction. It is composed of a groove 33 and a punch piece 34 attached to the groove 33 so as to be horizontally movable in the radial direction.

The punch piece 34 has a large-diameter sliding portion 3 on its upper portion.
5 and a punch working end 36 is provided at the bottom. According to this embodiment, as shown in the left half of FIG.
For example, as in the embodiment shown in FIG. 2, the first diaphragm φ7
After placing the workpiece 11 of the outer open shape 5 on the inclined surface 21 of the die 20, when the punch mechanism 30 is pressed toward the die 20 by a pressing device (not shown), each punch piece 34
Punch work end 36 of the outer edge 1 of the processed product 11 having an outward opening shape
1a is pushed along the inclined portion 21 provided on the die 20, and at the same time, as shown in the right half of FIG.
Moves in a direction of contracting toward a center of the die 20 on a line segment orthogonal to the direction of the press, whereby a force is generated along the inclined surface 21 of the die 20 in a direction of pushing the outer edge 11a, and the die 20 It is possible to obtain the deep-drawn product 12 with a high degree of workability by pushing it into the hole 23 at the center of the product.

The deep drawing apparatus according to this embodiment is shown in FIG.
In the case of applying to the deep drawing method shown in (1), the second punch 25 is inserted using the through hole 32. 11 to 1
3 shows one embodiment of the deep drawing apparatus according to claim 5.
Here, FIG. 11 is a view of the deep drawing apparatus according to the present embodiment as viewed from below. Reference numeral 20 denotes a die, and the die 20 is provided with an inclined portion 21 and a hole 23 at the center.

Reference numeral 40 represents a punch mechanism. Punch mechanism 40
Has a structure in which the punch working end 47 is rotatable in the radial direction along the inclined portion 21 of the die 20, and has an annular base plate 41 having a through hole 42 at the center, and the base plate 41 in the circumferential direction. The rotary receiver 43 is divided into 24 pieces and provided with an appropriate gap, an annular support portion 44 arranged on the lower side of the rotary receiver 43, and the rotary receiver 43 and the support portion 44. It is composed of a punch piece 45 which is attached to the rotation supporting portion so as to be freely rotatable in the radial direction.

The punch piece 45 is provided with a disk-shaped rotating portion 46 on the upper portion and a punch working end 47 on the lower portion. According to the present embodiment, as shown in the left half of FIG. 12, for example, as in the embodiment shown in FIG.
When the punching mechanism 40 is pressed toward the die 20 by a pressing device (not shown) after being placed on No. 1, the punch working end 47 of each punching piece 45 causes the outer edge 11a of the workpiece 11 having an outward opening shape to move to the die 20. At the same time as pushing along the inclined portion 21 provided, as shown in the right half of FIG. 12, the punch working end 47 moves on the line segment orthogonal to the direction of the press of the die 20.
It rotates toward the center of the die 20 as indicated by the arrow, and as a result, a force is generated along the inclined surface 21 of the die 20 in the direction of pushing the outer edge 11a, and the force is pushed into the hole 23 in the central portion of the die 20 and then all at once. It is possible to obtain a deep-drawn product 12 with high workability.

The deep drawing apparatus according to this embodiment is shown in FIG.
When applied to the deep drawing method shown in (1), the second punch 25 is inserted using the through hole 42. 14 to 2
Reference numeral 0 indicates an embodiment of the deep drawing apparatus according to claim 6.
Here, FIG. 14 is a view of the deep drawing apparatus according to the present embodiment as viewed from below. Reference numeral 20 denotes a die, and the die 20 is provided with an inclined portion 21 and a hole 23 at the center.

Reference numeral 50 represents a punch mechanism. Punch mechanism 50
Has a structure in which the punch working end 56 can be displaced in the radial direction along the inclined portion 21 of the die 20, and has an annular base 51 having a through hole 52 in the center, and the base 51 in the circumferential direction. A slit 53, which is divided into 24 pieces and provided with an appropriate gap, an annular support portion 54 arranged on the lower side of the slit 53, and an annular portion 56 is attached to the annular support portion 54. The circular punch 55 and the circular support portion 56 that supports the circular portion 56 of the circular punch 55.

The annular punch 55 is shown in FIGS.
0, the through hole 60 of the cone-shaped main body 57
24 punches 62 are formed by providing 24 slits 59 from the outer peripheral portion 61 to the outer peripheral portion 61 and providing an annular connecting portion 58 between the outer peripheral portion 61 and each slit 59. Each punch piece 62 is provided with a punch working end 63 at the bottom.

According to the present embodiment, as shown in the left half of FIG. 15, for example, similarly to the embodiment shown in FIG. When the punch mechanism 50 is pressed toward the die 20 by a pressing device (not shown) after being placed on the surface 21, the punch working end 63 of each punch piece 62 has an outward opening shape.
At the same time as pushing the outer edge 11a of the No. 1 along the inclined portion 21 provided on the die 20, as shown in the right half of FIG. 15, each punch piece 62 is radially moved by the elastic deflection of the punch material as shown by the arrow. Is displaced, which causes the inclined surface 2 of the die 20
As a result, a force is generated in the direction of pushing the outer edge 11a along 1 and the force is pushed into the hole 23 at the center of the die 20, and a deep-drawn product 12 with a high degree of work can be obtained all at once.

The deep drawing apparatus according to this embodiment is shown in FIG.
When applied to the deep drawing method shown in (1), the second punch 25 is inserted using the through hole 52.

[0038]

As described above, according to the inventions of claims 1 and 4 to 6, the outer edge of the deformed product or the intermediate product is the working end along the inclined portion provided on the die. Since a high-working intermediate process product or part can be obtained at once by pressing with a punch that has a mechanism capable of contracting in the radial direction, the cylindrical part of the high-workability intermediate process product or part is shocked. There is no line.
Similarly, in the flanged part, there is no shock line in the flange portion.

According to the second to sixth aspects of the invention, the punch has a mechanism in which the working edge of the outer edge of the deformed product or the intermediate process product can be contracted in the radial direction along the inclined portion provided on the die. At the same time as pressing with, by the synergistic effect of pressing with the second punch adjusted to an appropriate working force in the range where the comparative processed material does not break in the center of the processed material,
Since it is possible to obtain intermediate process products or parts with high workability all at once,
There is no shock line in the cylinder. Similarly,
In the flanged part, there is no shock line in the flange part.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a deep drawing method according to claim 1.

FIG. 2 is a cross-sectional view showing a processing process in FIG.

FIG. 3 is an explanatory view showing an embodiment of the deep drawing method according to claim 2 or claim 3.

FIG. 4 is a cross-sectional view showing a processing process in FIG.

5 is a diagram showing hardness distributions of a deep-drawn product according to the embodiment shown in FIG. 3 and a conventional product.

FIG. 6 is an explanatory view showing another embodiment of the deep drawing method according to claims 1 to 3.

FIG. 7 is an explanatory view showing another embodiment of the deep drawing method according to claims 2 and 3.

FIG. 8 is a bottom view showing an embodiment of the deep drawing apparatus according to claim 4;

9 is a cross-sectional view showing a state immediately before machining (left half) and a state immediately after machining (right half) in a machining process using the deep drawing apparatus of FIG.

10 is a side view showing a main part of the deep drawing apparatus of FIG.

FIG. 11 is a bottom view showing an embodiment of the deep drawing apparatus according to claim 5;

FIG. 12 is a cross-sectional view showing a state immediately before machining (left half) and a state immediately after machining (right half) in a machining process using the deep drawing device of FIG.

13 is a side view showing a main part of the deep drawing device of FIG. 11. FIG.

FIG. 14 is a bottom view showing an embodiment of the deep drawing apparatus according to claim 6;

15 is a cross-sectional view showing a state immediately before machining (left half) and a state near the end of machining (right half) in a machining process using the deep drawing apparatus of FIG.

16 is a side view showing a main part of the deep drawing device in FIG.

FIG. 17 is a plan view showing a shape of a punch of the deep drawing device shown in FIG. 14 when the punch is manufactured.

18 is a cross-sectional view of a punch of the deep drawing device of FIG.

FIG. 19 is a plan view showing the shape of the punch of the deep drawing device of FIG. 14 during work.

20 is a cross-sectional view of a punch of the deep drawing device of FIG.

FIG. 21 is an explanatory diagram showing a conventional redrawing process.

FIG. 22 is an explanatory diagram showing redrawing of a conventional flanged component.

[Explanation of symbols]

 10 Disc Blank 11 Processed Product with Outward Opening 11a Outer Edge 12, 13 Deep Drawing Product 15 Flange Component 16 Processed Product 17 Flange 20 Die 21 Sloping Part 22 Punch 23 Hole 24 Punch Working End 25 Second Punch 30, 40, 50 Punch mechanism 31, 41, 51 Base 32, 42, 52, 60 Through hole 33 Groove 34, 45, 62 Punch piece 35 Sliding part 36, 47, 56 Punch working end 43 Rotation receiver 46 Rotating part 53, 59 Slit 54 Support part 55 Punch 56 Annular part 57 Main body 58 Connecting part

Claims (6)

[Claims] 1. A deep drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided on a die, and an outer edge of a deformed product or an intermediate process product is provided along an inclined portion provided on the die. A deep drawing method characterized in that an intermediate step product or part is obtained by pushing the working end with a punch having a mechanism capable of contracting in the radial direction. 2. In a deep-drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided on a die, the working force is adjusted to an appropriate working force within a range in which the work material is not broken in the central portion of the work material. While pushing with the second punch, the outer edge of the deforming product or the intermediate process product is pushed by a punch having a mechanism in which its working end can be contracted in the radial direction along the inclined portion provided on the die, Deep drawing method characterized by obtaining intermediate process products or parts. 3. A deep drawing method in which a blank is drawn or redrawn by a press along an inclined portion provided on a die, and an outer edge of a deformed product or an intermediate process product is provided along an inclined portion provided on the die. The work end is pushed by a punch having a mechanism capable of contracting in the radial direction, and at the same time, it is pushed by a second punch adjusted to an appropriate acting force within the range where the work material does not break in the central part of the work material. The deep drawing method is characterized by obtaining intermediate process products or parts. 4. A deep drawing apparatus having a punching mechanism, the working end of which can be radially contracted along an inclined portion provided on the die according to any one of claims 1 to 3, The punch mechanism, whose working end is capable of contracting in the radial direction along the inclined portion, is designed so that each of the punch pieces divided into three or more in the circumferential direction and having an appropriate gap is A deep drawing device characterized by being installed so that it can be moved horizontally freely. 5. A deep drawing apparatus having a punching mechanism, the working end of which can be contracted in a radial direction along an inclined portion provided on the die according to claim 1, The punch mechanism, whose working end is capable of contracting in the radial direction along the inclined part, is designed so that each of the punch pieces divided into three or more in the circumferential direction and having a proper gap is reversed from the working end. A deep-drawing device, characterized in that it is attached so as to be freely rotatable in the radial direction at the end side. 6. A deep drawing apparatus having a punching mechanism, the working end of which can be radially contracted along an inclined portion provided on the die according to any one of claims 1 to 3, The punch mechanism, whose working end can contract in the radial direction along the inclined portion, has three or more slits of an appropriate width in the direction that equally divides the circumference from the working end of the punch toward the opposite end side. A deep drawing device, which is provided, and is capable of being displaced in the radial direction by elastic bending of the punch material only at the working end of one punch that remains connected at a part on the opposite end side.