JP2007054865A - Die device for wire drawing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die device for wire drawing by which a metallic wire having high straightness is manufactured. <P>SOLUTION: The die device 10A for wire drawing is provided with a wire-drawing die 12 and a spherical sliding bearing 14. In the wire-drawing die 12, a die hole 18a, into which a metallic wire is inserted, is formed. The wire-drawing die 12 is held rotatably with the spherical sliding bearing 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wire drawing die device including a wire drawing die for drawing a metal wire.

Conventionally, as a wire drawing die device, when drawing a wire using a wire drawing die, a device for fixing the wire drawing die to a die holder has been known (for example, see Patent Document 1).
JP 2002-292422 A

  By the way, metal wires with high straightness have been required for bonding wires and cut wires used for wire electric discharge machining. However, the wire rod fed from the capstan may be shaken, and the metal wire rod may enter the wire drawing die at a certain angle with respect to the central axis of the wire drawing die. In such a case, in the conventional wire drawing die apparatus, since the wire drawing die is fixed to the die holder, the resistance (drawing resistance) generated with respect to the metal wire during wire drawing increases and the metal wire warps. As a result, there is a problem that a metal wire with high straightness cannot be obtained.

  On the other hand, in the case of a metal wire having a large diameter or a deformed wire whose cross section perpendicular to the longitudinal direction of the metal wire has a substantially rectangular shape, the It has been required that the wire is warped to some extent so as to have a certain curvature. However, in order to perform the wire drawing so that the metal wire has a constant curvature using the conventional wire drawing die device, the wire is drawn so that the metal wire enters the wire drawing die at a predetermined angle. It was necessary to adjust the mounting angle of the wire die and the mounting position of the capstan. For this reason, there has been a problem that it takes much time and effort to draw a constant curvature in a metal wire having a large diameter or a deformed wire.

  An object of the present invention is to provide a wire drawing die device capable of producing a metal wire with high straightness. Another object of the present invention is to provide a wire drawing die device capable of easily producing a metal wire having a certain curvature.

  A wire drawing die device according to the present invention includes a wire drawing die formed with a die hole through which a metal wire is inserted, and a spherical plain bearing that rotatably holds the wire drawing die. And

  In the wire drawing die device according to the present invention, the wire drawing die is rotated by the spherical sliding bearing. As a result, even when the metal wire enters the wire drawing die at a certain angle with respect to the central axis of the wire drawing die, the wire drawing die is such that the wire drawing resistance is minimized according to the angle of entry. Rotate. As a result, when manufacturing a metal wire with high straightness, a metal wire with high straightness can be manufactured without causing a warp that adversely affects the metal wire.

  The wire drawing die device according to the present invention includes a wire drawing die having a die hole through which a metal wire is inserted, a spherical plain bearing that rotatably holds the wire drawing die, and a wire drawing die. A fixing means that abuts on the outer surface of the die and suppresses rotation by the spherical plain bearing is provided.

  In the wire drawing die device according to the present invention, the wire drawing die is rotated by the spherical sliding bearing, and the fixing means suppresses the rotation of the wire drawing die by the spherical plain bearing. Thereby, after the central axis of the wire drawing die is inclined by a desired angle by the spherical plain bearing, the rotation angle of the wire drawing die is suppressed by the fixing means, thereby adjusting the mounting angle of the wire drawing die. Therefore, a metal wire having a certain curvature can be easily obtained.

  Moreover, it is preferable that the fixing means includes a plurality of pins extending along the center axis of the die hole and capable of independently adjusting the longitudinal position. If it does in this way, the drawing die can be fixed by the plane specified by the tip part of each pin by abutting the tip part of each pin on the outside face of the drawing die.

  Moreover, in any of the above wire drawing die devices, it is preferable to further include a die holder for holding the spherical plain bearing. In this way, the wire drawing die can be securely held together with the spherical plain bearing.

  ADVANTAGE OF THE INVENTION According to this invention, the die apparatus for wire drawing which can manufacture a metal wire with high straightness can be provided. Moreover, according to this invention, the metal wire which has a fixed curvature can be manufactured easily.

  Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

(First embodiment)
With reference to FIG. 1, the structure of the wire drawing die apparatus 10A according to the first embodiment will be described. FIG. 1 is a side sectional view showing a wire drawing die and a die holder according to the first embodiment.

  The wire drawing die device 10 </ b> A is a device for drawing the metal wire 32. For this purpose, the wire drawing die device 10 </ b> A includes a wire drawing die 12, a spherical sliding bearing 14, and a die holder 16.

  The wire drawing die 12 includes a die member 18, a mount portion 20, and a holding case 22.

  The die member 22 has a substantially cylindrical outer shape. A die hole 18a through which the metal wire 32 is inserted is formed at the center of the die member 18, and the wire diameter of the metal wire 32 is determined at the minimum diameter portion of the die hole 18a. As the die member 18, a diamond sintered body (PCD: Polycrystalline Diamond), cemented carbide, single crystal diamond (for example, natural diamond, synthetic diamond), SKD steel, or the like can be used.

  The mount portion 20 is provided so as to abut the outer surface of the die member 18 and surround the periphery of the die member 18. The mount portion 20 is formed of a sintered metal made of, for example, a Sn—Cu alloy or a Ni-based alloy. The mount 20 is formed with an opening 20a that gradually increases in width along the central axis X from the smallest diameter portion of the die hole 18a.

  The holding case 22 has a cup shape with a substantially U-shaped side section. The holding case 22 holds the die member 18 and the mount portion 20 and is made of, for example, stainless steel. The holding case 22 is formed with an opening 22a that gradually widens along the central axis X from the smallest diameter portion of the die hole 18a. In addition, the holding case 22 is provided with a flange portion 22b that engages with the outer surface of the inner ring 24 so that the wire drawing die 12 does not come off from the spherical plain bearing 14 due to wire drawing resistance when the metal wire is inserted. .

  The spherical plain bearing 14 includes an inner ring 24 and an outer ring 26. In the spherical plain bearing 14, a sliding contact surface is formed by a spherical surface in which the outer peripheral surface of the inner ring 24 and the inner peripheral surface of the outer ring 26 are in contact, and three-dimensionally (the central axis X of the die hole 18 a is in an arbitrary direction). It can be rotated (to face). Specifically, the spherical plain bearing 14 is rotatable in the directions of arrows A and B shown in FIG. 1 about an axis (for example, the axis Y shown in FIG. 1) intersecting the central axis X. Yes. The inner ring 24 is fitted to the holding case 22 so that the bearing inner diameter surface 24 a contacts the outer peripheral surface of the holding case 22. The outer ring 26 is fitted to the die holder 16 so that the bearing outer diameter surface 26 a contacts the inner peripheral surface of the die holder 16.

  The die holder 16 has a cup shape with a substantially U-shaped side section, and holds the spherical plain bearing 14. The die holder 16 is formed with an opening 16 a that does not hinder the rotation of the spherical plain bearing 14. In addition, the die holder 16 is provided with a flange portion 16b that engages with the outer surface of the outer ring 26 so that the spherical plain bearing 14 does not come out of the die holder 16 due to the drawing resistance when the metal wire is inserted.

  As described above, in the first embodiment, the wire drawing die 12 is fitted to the inner ring 24 of the spherical plain bearing 14, and the outer ring 26 of the spherical plain bearing 14 is fitted to the die holder 16. For this reason, the wire drawing die 12 is rotated three-dimensionally (for example, around the axis Y) by the spherical plain bearing 14. Thus, when the wire rod 32 is drawn by the wire drawing die device 10A, the metal wire 32 has a certain angle with respect to the central axis X (see FIG. 1) of the die hole 18a before the wire drawing die 12 is rotated. Even when the wire 32 enters the wire drawing die 12, the wire drawing die 12 is rotated so that the wire drawing resistance is minimized according to the angle (see FIG. 2). As a result, when manufacturing a metal wire with high straightness, a metal wire with high straightness can be manufactured without causing a warp that adversely affects the metal wire.

(Second Embodiment)
Next, with reference to FIG. 3, the wire drawing die apparatus 10B according to the second embodiment will be described. FIG. 3 is a diagram for explaining a configuration and a usage method of the wire drawing die device according to the second embodiment.

  In the wire drawing die device 10B according to the second embodiment, a plurality of (three in the second embodiment) pins extending along the central axis X on the outer surface 16c of the die holder 16 on the insertion side of the metal wire 32. The base member 30 having 28 is provided, which is different from the wire drawing die device 10A according to the first embodiment described above. Each pin 28 can reciprocate in the longitudinal direction, and the position in the longitudinal direction can be independently adjusted. It should be noted that the position of each pin 28 in the longitudinal direction can be adjusted by adjusting the feed amount of each pin 28 by manpower or a motor (not shown).

  Thus, in 2nd Embodiment, the base member 30 which has each pin 28 is provided in the die holder 16, and the position of the longitudinal direction of each pin 28 can be adjusted independently, respectively. For this reason, as shown in FIG. 3, by adjusting each pin 28 so that the tip 28 a of each pin 28 abuts on the outer surface 12 a of the wire drawing die 12, the tip 28 a of each pin 28 is adjusted. The wire drawing die 12 can be fixed in a state where it is tilted by a desired angle by the plane defined by. As a result, in the wire drawing die apparatus 10B, the metal wire 32 is inserted through the die hole 18a along the central axis X (see FIG. 1) of the die hole 18a before the wire drawing die 12 is rotated. The metal wire 32 having a certain curvature can be easily obtained without adjusting the mounting angle or the like of the wire drawing die 12 as in the conventional wire drawing die device.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the first and second embodiments, the mount portion 20 is formed of a sintered metal, but the mount portion 20 is an annular member made of a hard material such as cemented carbide, cermet, or nickel alloy, or stainless steel. May be. Moreover, as the mount part 20, a some annular member may be used and what combined the annular member and the sintered metal may be used.

  In addition to the circular shape, the shape of the die hole 18a may be an irregular shape other than a circular shape such as a square shape.

  In the first and second embodiments, the wire drawing die 12 and the inner ring 24 of the spherical plain bearing 14 are fitted together, and the outer ring 26 of the spherical plain bearing 14 and the die holder 16 are fitted together to draw a wire drawing die device. 10A and 10B, for example, screw grooves are provided on the outer peripheral surface of the wire drawing die 12, the bearing inner surface 24a of the inner ring 24, the bearing outer surface 26a of the outer ring 26, and the inner peripheral surface of the die holder 16. The wire drawing dice apparatuses 10A and 10B may be configured by other various methods such as screwing together.

It is side surface sectional drawing which shows the dice apparatus for wire drawing which concerns on 1st Embodiment. It is a figure for demonstrating the usage method of the dice apparatus for wire drawing which concerns on 1st Embodiment. It is a figure for demonstrating the structure and usage method of the wire drawing die apparatus which concern on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10A, 10B ... Die apparatus for wire drawing, 12 ... Die for wire drawing, 14 ... Spherical plain bearing, 16 ... Die holder, 18a ... Die hole, 28 ... Pin, 32 ... Metal wire.

Claims (4)

A wire drawing die formed with a die hole through which a metal wire is inserted;
And a spherical sliding bearing for rotatably holding the wire drawing die. A wire drawing die formed with a die hole through which a metal wire is inserted;
A spherical plain bearing for rotatably holding the wire drawing die;
A wire drawing die apparatus, comprising: a fixing means that abuts on an outer surface of the wire drawing die and suppresses rotation by the spherical plain bearing.   3. The wire drawing die according to claim 2, wherein the fixing means includes a plurality of pins extending along a central axis of the die hole and capable of independently adjusting a longitudinal position. apparatus. The die device for wire drawing according to any one of claims 1 to 3, further comprising a die holder for holding the spherical plain bearing.

Images