WO2018230001A1

WO2018230001A1 - Metallic-fabricated-material manufacturing method

Info

Publication number: WO2018230001A1
Application number: PCT/JP2017/026055
Authority: WO
Inventors: 直樹藤井
Original assignee: 株式会社カネミツ
Priority date: 2017-06-15
Filing date: 2017-07-19
Publication date: 2018-12-20
Also published as: JP2019000871A

Abstract

The accuracy of the outer diameter of a metallic fabricated material having a circular tube section is improved. A metallic-fabricated-material manufacturing method according to the present invention includes a circular-tube-section forming step S300 and an elongation step S302. In the circular-tube-section forming step S300, plastic working is applied to a metal plate (not shown) so as to form a metallic fabricated material. In the elongation step S302, in a state in which a flange section of the metallic fabricated material is fixed, a rotation punch proceeds into a circular tube section of the metallic fabricated material. Accordingly, the circular tube section is elongated.

Description

Method for producing metal shaped material

The present invention relates to a method for manufacturing a metal base material.

Patent Document 1 discloses a method for manufacturing a beer mug. The manufacturing method of the beer mug includes a step of producing an outer member, a step of producing an inner member, a step of installing a weight member, and a step of joining the outer member and the inner member. In the step of manufacturing the outer surface member, the outer surface side member made of a stainless steel thin plate and the outer surface bottom member made of a stainless steel thin plate are joined and formed into a bottomed container shape. In the step of producing the inner surface member, the inner surface side member made of a stainless steel thin plate and the inner surface bottom member made of a stainless steel thin plate are joined, and they are formed into a bottomed container shape having a smaller dimension than the outer surface member. In the step of installing the weight member, the weight member is installed on the bottom surface of the outer surface member. In the process of joining the outer member and the inner member, the outer member and the inner member are joined so that a space is provided between the outer member and the inner member.

According to the method for producing a beer mug disclosed in Patent Document 1, it is possible to provide a method for producing a beer mug having a double structure made of stainless steel and having excellent heat insulating properties and cold insulation properties.

JP 2002-177119 A

However, the invention disclosed in Patent Document 1 has a problem that it is difficult to increase the shape accuracy of the beer mug, particularly the accuracy of the outer diameter of the outer surface member and the accuracy of the outer diameter of the inner surface member.

An object of the present invention is to provide a method for manufacturing a metal shape material that can increase the accuracy of the outer diameter of the metal shape material having a circular pipe portion.

In order to achieve the above object, according to one aspect of the present invention, a method for manufacturing a metal shaped member includes a circular pipe part forming step S300 and an extending step S302. In the circular tube portion forming step S300, the metal plate is plastic processed so that the metal preform 200 is formed. The metal element 200 has a circular pipe part 210 and a flange part 212. The flange portion 212 continues to the edge of the circular pipe portion 210. In the extension step S302, the punch 24 enters the circular pipe portion 210 in a state where the flange portion 212 is fixed. Thereby, the circular pipe part 210 is extended. The punch 24 includes a rotating body 50 and a drive unit 52. The rotating body 50 is rotatable. The drive unit 52 drives the rotating body 50 to rotate. The extension step S302 includes a die insertion step S310 and a rotation insertion step S312. In the die fitting step S <b> 310, the circular pipe portion 210 of the metal preform 200 is fitted into the die 20. In the rotation insertion step S <b> 312, the circular pipe part 210 is extended by the circular pipe part 210 being pressed against the die 20 by the rotary body 50 while the rotary body 50 is rolled on the surface of the circular pipe part 210.

In the rotation insertion step S312, the circular pipe part 210 is pressed against the die 20 by the rotary body 50 while the rotary body 50 is rolled on the surface of the circular pipe part 210. Thereby, the circular pipe part 210 adheres to the die 20 and is extended. When the circular pipe part 210 comes into close contact with the die 20 and is extended, the outer diameter of the circular pipe part 210 is determined by the die 20. Since the outer diameter of the circular pipe part 210 is determined by the die 20, compared to the case where the outer diameter of the circular pipe part 210 is determined by pressing a roller or other movable member against the outer periphery of the circular pipe part 210. The accuracy of the outer diameter of the circular pipe portion 210 is increased.

Further, the above-described die 20 has an inner peripheral surface 30 and an annular flat surface portion 32. The inner peripheral surface 30 forms a cylindrical space 36. In this case, it is desirable that the die fitting step S310 includes a housing step S320 and a flange fixing step S322. In the housing step S <b> 320, the circular pipe part 210 of the metal preform 200 is housed in the cylindrical space 36. In the flange fixing step S322, the flange portion 212 is fixed to the annular flat surface portion 32 of the die 20.

In the flange fixing step S322, the flange portion 212 of the metal shaped member 200 in which the circular pipe portion 210 is previously accommodated in the cylindrical space 36 is fixed to the annular flat portion 32 of the die 20. In this state, the circular pipe portion 210 is pressed against the inner peripheral surface 30 of the die 20. Thereby, the precision of the outer diameter of the circular pipe part 210 of the metal shaped member 200 is increased.

Alternatively, in the above-described housing step S320, it is desirable that the cylindrical space 36 is housed in the cylindrical space 36 so that the central axis of the circular tube portion 210 of the metal preform 200 is along the direction of gravity. In this case, in the rotational insertion step S312, it is desirable that the punch 24 is inserted into the circular tube portion 210 along the direction of gravity.

Since the central axis of the circular pipe portion 210 is along the direction of gravity and the punch 24 is inserted into the circular pipe portion 210 so as to be along the direction of gravity, the punch 24 is less likely to bend than in other cases. Since the punch 24 is difficult to bend, the accuracy of the outer diameter of the circular pipe portion 210 is higher than when the punch 24 is easily bent.

Further, it is desirable that the above-described punch 24 has an even number of rotating bodies 50. In this case, it is desirable that the driving unit 52 drives the even number of rotating bodies 50 so that the even number of rotating bodies 50 revolve around a predetermined rotation center. In this case, it is desirable that each of the rotators 50 face one of the other rotators 50 on a one-to-one basis with a predetermined center of rotation in between.

When each of the rotators 50 faces one of the other rotators 50 with a predetermined center of rotation on a one-to-one basis, the rotator 50 places the circular tube portion 210 on the inner peripheral surface 30 of the die 20 as compared to the case where the rotator 50 does not. When pressed against the punch 24, the punch 24 is difficult to bend. Since the punch 24 is difficult to bend, the rotating body 50 can strongly press the circular pipe portion 210 against the inner peripheral surface 30 of the die 20 as compared with the case where the punch 24 is easily bent. When the circular pipe part 210 is strongly pressed against the inner peripheral surface 30 of the die 20, the accuracy of the outer diameter of the circular pipe part 210 is higher than when the circular pipe part 210 is not pressed.

According to the present invention, the accuracy of the outer diameter of the metal shaped member having a circular pipe portion can be increased.

It is a conceptual diagram of the plastic working apparatus concerning one Embodiment of this invention. It is a conceptual diagram which shows the structure of the drive part concerning one Embodiment of this invention. It is sectional drawing of the punch concerning one Embodiment of this invention. It is a figure which shows the process of the manufacturing method of the metal raw material concerning one Embodiment of this invention. It is a figure which shows the condition which fitted the die | dye to the circular pipe part of the metal-made shape material in one Embodiment of this invention. It is a figure which shows the condition which has inserted the punch in the circular pipe part of a metal raw material in one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[Structure of manufacturing method of metal base material]
FIG. 1 is a conceptual diagram of a plastic working apparatus 10 according to the present embodiment. The configuration of the plastic working apparatus 10 according to the present embodiment will be described with reference to FIG.

The plastic working apparatus 10 according to the present embodiment includes a cylindrical die 20, a member presser 22, and a rotary punch 24. The cylindrical die 20 forms the outer peripheral surface of the metal preform 200. The member presser 22 presses the edge of the metal base material 200 against the cylindrical die 20 when the metal base material 200 is plastically processed. The rotary punch 24 forms the circular pipe part 210 when the metal shaped member 200 is plastically processed. In the case of this embodiment, the rotary punch 24 can move up and down along the direction of gravity. The specific configuration for this purpose is the same as that for enabling the punch to advance and retreat along a predetermined direction in a known plastic working apparatus.

The cylindrical die 20 has a cylindrical inner peripheral surface 30 and an annular flat surface portion 32. The cylindrical inner peripheral surface 30 forms a columnar space 36. A metal element 200 is accommodated in the cylindrical space 36. In the present embodiment, the central axis of the cylindrical inner peripheral surface 30 is along the direction of gravity. The annular flat surface portion 32 continues to the edge portion of the cylindrical inner peripheral surface 30. The edge of the metal preform 200 is pressed against the annular flat surface portion 32.

In the present embodiment, the member presser 22 has an annular material 40 and a bolt (not shown). The annular member 40 contacts the edge of the metal member 200 when the metal member 200 is pressed against the annular flat surface portion 32 of the cylindrical die 20. The bolt connects the annular member 40 to the annular flat surface portion 32 of the cylindrical die 20. As a result, the metal element 200 is pressed by the annular member 40.

FIG. 2 is a conceptual diagram showing the configuration of the drive unit 52 according to the present embodiment. 3 is a cross-sectional view taken along the line AA in FIG. In FIG. 3, the member presser 22 is not shown. Based on FIG. 1 thru | or FIG. 3, the structure of the rotary punch 24 concerning this embodiment is shown. The rotary punch 24 according to the present embodiment includes four rotary bodies 50, a drive unit 52, and a holding unit 54. The rotating body 50 is rotatable. The rotating body 50 spreads the metal shape member 200. In the case of the present embodiment, as shown in FIG. 3, the rotator 50 faces one of the other rotators 50 across the center of rotation of revolution. In the case of this embodiment, the rotating body 50 has a curved outer peripheral surface. This curved surface is a surface having a circular cross section parallel to the revolution surface of the rotating body 50. This curved surface is a surface in which a cross section parallel to the revolution axis of the rotator 50 is arcuate. The drive unit 52 drives the rotating body 50 so that the rotating body 50 revolves around the rotation center. The holding unit 54 holds the driving unit 52.

The driving unit 52 includes a support plate 70, a support column 72, a rotation unit 74, and a shaft member 76. The support plate 70 supports the rotating body 50. The support column 72 connects the support plate 70 and the rotation portion 74. Thereby, dropping of the rotating body 50 arranged between them from the rotating punch 24 is prevented. The shaft member 76 holds the rotating body 50 so that the rotating body 50 can rotate about its central axis.

[Production method of metal profile]
FIG. 5 is a diagram illustrating a state where the circular pipe portion 210 of the metal preform 200 is fitted to the cylindrical die 20 in the present embodiment. FIG. 6 is a diagram illustrating a state in which the rotary punch 24 is inserted into the circular pipe portion 210 of the metal preform 200 in the present embodiment. Hereinafter, with reference to FIGS. 5 and 6, a method of using the method for producing a metal shaped material according to the present embodiment will be described.

The manufacturing method of the metal shaped member according to the present embodiment includes a circular pipe part forming step S300 and an extending step S302.

In the circular pipe portion forming step S300, a metal plate (not shown) is plastic processed so that the metal preform 200 is formed. The metal preform 200 according to the present embodiment includes a circular pipe portion 210 and a flange portion 212. The flange portion 212 continues to the edge of the circular pipe portion 210. The specific procedure of such plastic working is the same as a well-known one. Therefore, detailed description thereof will not be repeated here.

In the extension step S302, the rotary punch 24 enters the circular pipe part 210 in a state where the flange part 212 of the metal preform 200 is fixed. Thereby, the circular pipe part 210 is extended. In the present embodiment, the extension step S302 includes a die insertion step S310 and a rotation insertion step S312.

In the die fitting step S <b> 310, the operator fits the circular pipe portion 210 of the metal preform 200 into the cylindrical die 20. In the case of the present embodiment, the die fitting step S310 includes a housing step S320 and a flange fixing step S322.

In the accommodating step S320, the operator accommodates the circular pipe portion 210 of the metal preform 200 in the cylindrical space 36 of the cylindrical die 20, as shown in FIG. At this time, the flange portion 212 of the metal shaped member 200 is placed on the annular flat surface portion 32 of the cylindrical die 20. In the present embodiment, the central axis of the cylindrical inner peripheral surface 30 of the cylindrical die 20 is along the direction of gravity. The central axis of the circular pipe part 210 of the metal element 200 is accommodated in the cylindrical space 36 along the direction of gravity.

In the flange fixing step S322, the operator places the annular material 40 of the member presser 22 on the flange portion 212 of the metal preform 200 as shown in FIG. When the annular member 40 is loaded, the operator connects the annular member 40 to the cylindrical space 36 of the cylindrical die 20 with the bolts of the member pressers 22. Thereby, the flange part 212 of the metal shaped member 200 is fixed to the annular flat part 32 of the cylindrical die 20.

In the rotation insertion step S312, the operator causes the drive unit 52 to revolve the rotating body 50. Next, the operator controls the plastic working apparatus 10 so that the rotating body 50 is pressed against the inner peripheral surface of the circular pipe part 210 of the metal preform 200. The specific procedure for this control is the same as the procedure for pressing the punch against the base material in a known plastic working apparatus. Therefore, detailed description thereof will not be repeated here. At that time, the rotary punch 24 is inserted into the circular pipe portion 210 along the direction of gravity. Since the rotating body 50 is revolved and pressed against the inner peripheral surface of the circular pipe portion 210 of the metal preform 200, the rotating body 50 is rolled on the surface of the circular pipe portion 210. At that time, the rotating body 50 presses the circular pipe portion 210 against the cylindrical die 20. Thereby, as shown in FIG. 6, the circular pipe portion 210 is thinned and extended. The metal shaped member 200 with the circular pipe part 210 extended is further subjected to arbitrary processing. For example, the bottom is cut off. As a result, the metal base material 200 becomes a cylindrical base material.

[Effect of the method for producing a metal shaped member according to the present embodiment]
According to the method for manufacturing the metal preform 200 according to the present embodiment, the rotating body 50 is rolled on the surface of the circular pipe portion 210 in the rotation insertion step S312. At that time, the circular pipe portion 210 is pressed against the cylindrical die 20 by the rotating body 50. Thereby, compared with the case where the circular pipe part 210 is not pressed against the cylindrical die 20, the accuracy of the outer diameter of the circular pipe part 210 becomes high.

Further, in the flange fixing step S 322, the flange portion 212 of the metal preform 200 in which the circular pipe portion 210 is previously accommodated in the cylindrical space 36 is fixed to the annular flat portion 32 of the cylindrical die 20. In this state, the circular pipe portion 210 is pressed against the cylindrical inner peripheral surface 30 of the cylindrical die 20. Thereby, the precision of the outer diameter of the circular pipe part 210 of the metal shaped member 200 is increased.

In addition, since the central axis of the circular pipe portion 210 is along the gravity direction and the rotary punch 24 is inserted into the circular pipe portion 210 so as to be along the gravity direction, the circular pipe portion 210 is compared with the case where it is not. The accuracy of the outer diameter is increased.

Further, when the rotating body 50 is opposed to any of the other rotating bodies 50 across the center of revolution, the accuracy of the outer diameter of the circular pipe portion 210 is higher than in the case where the rotating body 50 is not.

The embodiment disclosed this time is illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment, and various design changes may be made without departing from the spirit of the present invention.

For example, the number and arrangement of the rotary bodies 50 in the rotary punch 24 are not limited to those described above. The rotation bodies 50 are preferably arranged at positions where reaction forces received by the rotation bodies 50 are balanced with each other. An example of such an arrangement is that the center of rotation of the rotating body 50 is arranged at a position that is a vertex of an equilateral triangle. This is because the punch 24 is less likely to bend than when the half forces are not balanced. When the punch 24 is difficult to bend, the accuracy of the outer diameter of the circular pipe portion 210 is higher than when the punch 24 is easily bent. Of course, it is more desirable that the punch 24 has an even number of rotating bodies 50, and each of the rotating bodies 50 faces one of the other rotating bodies 50 on a one-to-one basis with a predetermined center of rotation in between. . This is because the punch 24 becomes more difficult to bend.

The plastic working apparatus according to the present invention may include a control device that controls the moving direction of the rotary punch 24 so that the rotary punch 24 advances along the central axis of the cylindrical inner peripheral surface 30 of the cylindrical die 20. Good. When a plastic working device having such a control device is used, it is desirable that the central axis of the circular pipe portion 210 of the metal shaped member 200 is accommodated in the cylindrical space 36 along the direction.

Further, the height of the cylindrical die 20 in the present invention is not particularly limited. However, a higher height is desirable.

DESCRIPTION OF SYMBOLS 10 ... Plastic processing apparatus 20 ... Cylindrical die 24 ... Rotary punch 30 ... Cylindrical inner peripheral surface 32 ... Cylindrical plane part 36 ... Cylindrical space 40 ... Ring material 50 ... Rotating body 52 ... Drive part 54 ... Holding part 70 ... Support plate 72 ... support pillar 74 ... rotating portion 76 ... shaft member 200 ... metal body 210 ... circular tube portion 212 ... flange portion

Claims

A circular pipe part forming step of plastically processing a metal plate so that a metal raw material having a circular pipe part and a flange part connected to an edge of the circular pipe part is formed;
An extension step of extending the circular pipe part by allowing a punch to enter the circular pipe part in a state in which the flange part is fixed,
The punch
A rotatable rotating body,
A drive unit that drives the rotating body to rotate,
The stretching step comprises:
A die fitting step of fitting the circular pipe portion of the metal shaped member into a die; and
A metal element having a rotating insertion step of extending the circular pipe part by pressing the circular pipe part against the die with the rotary body while rolling the rotary body on the surface of the circular pipe part Manufacturing method.
The die is
An inner peripheral surface forming a cylindrical space;
An annular flat surface portion connected to the edge of the inner peripheral surface,
The die fitting process includes
An accommodating step of accommodating the circular pipe part of the metal shaped member in the columnar space;
The method of manufacturing a metal shaped member according to claim 1, further comprising a flange fixing step of fixing the flange portion to the annular flat portion of the die.
In the housing step, the center axis of the circular tube part of the metal shaped member is housed in the cylindrical space so as to be along the direction of gravity,
3. The method for manufacturing a metal shaped member according to claim 2, wherein the punch is inserted into the circular pipe portion along the direction of gravity in the rotation insertion step.
The punch has an even number of rotating bodies;
The drive unit drives the even number of rotating bodies so that the even number of rotating bodies revolve around a predetermined rotation center;
2. The method for manufacturing a metal shaped member according to claim 1, wherein each of the rotating bodies faces one of the other rotating bodies on a one-to-one basis with the predetermined rotation center interposed therebetween.