JP2010284673A - Method for manufacturing copper wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a copper wire which can easily regulate an axial hole or an axial line of a wire drawing die in response to a change in a wire drawing pass line for the copper wire, can realize good wire drawing free from wire breaking and the like, and can realize stable quality and manufacturing yield of the copper wire. <P>SOLUTION: In the method for manufacturing a copper wire 5 by wire-drawing the copper wire 5 finely using a wire drawing die 4, a wire drawing die 4 is mounted and supported on a die holder 7 fixed on a wire drawing pass line for the copper wire 5, and an elastic means is allowed to act on both a wire drawing die 4 and a die holder 7, whereby the wire drawing die 4 can be elastically supported on the die holder 7 and the copper wire 5 can be manufactured by wire-drawing through the elastically supported wire drawing die 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for producing a copper wire, and more particularly, to a method for producing a copper wire in which a copper wire is thinly drawn to a diameter of 30 μm or less using a wire drawing die.

  With the reduction in size and weight of electronic devices and medical devices, the amount of thin copper wires called ultrafine wires having a diameter of 30 μm or less is increasing. Such a thin copper wire is also usually manufactured by thinly drawing a copper wire using a wire drawing die.

  Conventionally, when a copper wire is drawn thinly using a wire drawing die, a continuous wire drawing machine 3 provided with a pair of drawn capstans 1 and 2 as shown in FIGS. When the copper wire 5 is drawn thinly by using an example, a copper that travels repeatedly between the drawing capstans 1 and 2 by half-turning a predetermined position on each of the drawing capstans 1 and 2 will be described. The wire drawing dies 4 are respectively attached to and supported by a plurality of die holders 20 fixed by welding, screwing or the like on the wire drawing pass line of the wire 5, and the copper wires 5 are sequentially passed through these wire drawing dies 4. Wire thinly. Here, as shown in FIG. 5B, the wire drawing die 4 is attached to the die holder 20 by inserting the wire drawing die 4 into the main body of the die holder 20 and fixing them together. Moreover, in wire drawing, it draws, supplying liquid lubricating oil or water 9 on the copper wire 5 to drive | work. Further, in the wire drawing method using the continuous wire drawing machine 3, since the wire drawing speed can be increased and the wire drawing work can be continued, this method is currently the mainstream of the wire drawing method. . 5A is a top view of the continuous wire drawing machine 3, FIG. 5B is a cross-sectional view showing a state where the wire drawing die 4 is attached to the die holder 20, and FIG. 5C is a wire drawing die 4. It is a partial cross section figure which shows the state which draws a copper wire thinly through.

  According to this method, the drawing pass line of the copper wire 5 may change depending on the drawing conditions and the change in the situation during drawing. When the drawing pass line of the copper wire 5 changes, the drawing pass line and the shaft hole or axis of the drawing die 4 do not match. Therefore, the shaft hole or axis of the drawing die 4 is moved to match it. However, there is a problem that this adjustment is difficult. This adjustment is also referred to as “positioning” of the wire drawing die 4.

  Therefore, conventionally, as can be seen in Patent Document 1 and Patent Document 2, a screw-type angle adjusting mechanism with a measuring means such as a micrometer is provided on a die holder for attaching and supporting a wire drawing die, which is manually operated. By operating, the shaft hole or the axis of the wire drawing die is finely adjusted. That is, by manually operating the screw member of the screw-type angle adjusting mechanism, the shaft hole or the axis of the wire drawing die is adjusted with its horizontal and vertical angles.

  However, in the method of adjusting the shaft hole or axis of the wire drawing die by manually operating the screw type angle adjusting mechanism, for example, when a thin copper wire having a diameter of 30 μm or less is manufactured by wire drawing, the copper wire is visually observed. Because this is difficult, not only does it take time to adjust the shaft hole or axis of the wire drawing die, but it also cannot be adjusted flexibly in response to changes in the copper wire drawing pass line. There is. In addition, the manual operation of the screw-type angle adjustment mechanism has the problem that adjustment errors due to the experience of the operator appear prominently, and at present, anyone can easily adjust the shaft hole or axis of the wire drawing die Not. For this reason, even if the shaft hole or axis of the wire drawing die is adjusted by manually operating the screw type angle adjustment mechanism, the shaft hole or axis of the wire drawing die is the copper wire drawing pass line. Often not exactly the same. In particular, as shown in FIG. 6, when a copper wire 5 is drawn thinly through a plurality of wire drawing dies 4 using a continuous wire drawing machine, there is also a change in the drawing pass line of the copper wire 5, and the adjacent wires are adjacent. There is a high possibility that the shaft holes or the axes of the wire drawing dies 4 will not match each other. If the wire drawing operation is continued in such a state, an extra load such as a bending load is applied to the copper wire 5 being drawn, thereby causing the copper wire 5 to be stretched or twisted, resulting in disconnection. In addition, when the surface of the copper wire 5 locally hits the shaft hole of the wire drawing die 4 (biased), the copper wire 5 vibrates during wire drawing and a large amount of copper powder is placed in the shaft hole of the wire drawing die 4. Due to adhesion of (rubbing residue), the surface of the copper wire 5 after drawing is damaged, and there is a problem that breakage occurs frequently. As a result, there is a problem in that the quality of the copper wire as a product and the production yield are greatly adversely affected.

  On the other hand, Patent Document 3 describes a wire drawing die device having a spherical sliding bearing. According to this wire drawing die apparatus, the wire drawing die is rotatably held by the spherical sliding bearing, and this mechanism minimizes the wire drawing resistance in accordance with the change in the angle of entry of the wire to be drawn. Thus, the wire drawing die can be moved.

Japanese Utility Model Publication No. 64-20906 JP 2004-344901 A JP 2007-54865 A

  As described above, in the method of adjusting the shaft hole or the axis of the wire drawing die by providing a screw type angle adjusting mechanism and manually operating it, for example, a thin copper wire having a diameter of 30 μm or less is manufactured by wire drawing. In this case, it is difficult to visually observe the copper wire itself, so it takes time to adjust the shaft hole or the axis of the wire drawing die, and it can respond flexibly to changes in the copper wire drawing pass line. There is a problem that adjustments cannot be made. In addition, the manual operation of the screw-type angle adjustment mechanism has the problem that adjustment errors due to the experience of the operator appear prominently, and at present, anyone can easily adjust the shaft hole or axis of the wire drawing die Not. For this reason, even if the shaft hole or axis of the wire drawing die is adjusted by manually operating the screw type angle adjustment mechanism, the shaft hole or axis of the wire drawing die is the copper wire drawing pass line. Often not exactly the same. In particular, as shown in FIG. 5, when a copper wire is drawn thinly through a plurality of wire drawing dies using a continuous wire drawing machine, there is a change in the copper wire drawing pass line, and the adjacent wire drawing dies There is a high possibility that the shaft holes or the axes of the two will not match each other. If the wire drawing operation is continued in such a state, an extra load such as a bending load is applied to the copper wire being drawn, thereby causing the copper wire to be stretched or twisted, resulting in disconnection. In addition, when the surface of the copper wire hits the shaft hole of the wire drawing die locally (biased), the copper wire vibrates during wire drawing and a large amount of copper powder (rubbing residue) in the shaft hole of the wire drawing die. As a result of adhesion, scratches occur on the surface of the copper wire after wire drawing, and there are problems that wire breakage frequently occurs. As a result, there is a problem in that the quality of the copper wire as a product and the production yield are greatly adversely affected.

  On the other hand, Patent Document 3 describes a wire drawing die device in which a wire drawing die is rotatably held by a spherical sliding bearing. According to this wire drawing die device, the wire drawing die can be moved so that the wire drawing resistance is minimized in response to the change in the approach angle of the wire to be drawn. A so-called wire drawing die self-aligning mechanism using a bearing has a single point at the center of the spherical surface.

  Accordingly, an object of the present invention is to easily adjust the shaft hole or the axis of the wire drawing die in response to the change of the wire drawing pass line of the copper wire, thereby performing good wire drawing without disconnection or the like. It is possible to provide a copper wire manufacturing method capable of stabilizing the quality of the copper wire as a product and the manufacturing yield thereof.

  In order to achieve the above object, a first aspect of the present invention provides a copper wire manufacturing method for thinly drawing a copper wire using a wire drawing die, and a die fixedly provided on a copper wire drawing pass line. The wire drawing die is attached to and supported by a holder, and the wire drawing die is elastically supported by the die holder by acting an elastic means between the wire drawing die and the die holder, and the elasticity is thereby increased. A method of manufacturing a copper wire is provided, in which a copper wire is drawn through the wire drawing die that is supported on the surface.

  According to this copper wire manufacturing method, by adopting the above-described configuration, the wire drawing die is elastically supported by the die holder, particularly by applying an elastic means between the wire drawing die and the die holder. By drawing the copper wire through the elastically supported wire drawing die, even if the copper wire drawing pass line changes, the wire drawing die will not be subjected to excessive load such as bending load on the copper wire. Therefore, the shaft hole or axis of the wire drawing die can be easily adjusted flexibly according to changes in the wire drawing pass line of the copper wire. As a result, good wire drawing without disconnection or the like can be performed, and the quality of the copper wire as a product and its production yield can be stabilized. In particular, when a copper wire is drawn thinly through a plurality of wire drawing dies using a continuous wire drawing machine, there is also a change in the wire drawing pass line, and the state where the axial holes or axes of adjacent wire drawing dies do not match. In this case, there are problems such as breakage due to elongation and twisting of the copper wire, scratches on the surface of the copper wire due to vibration and adhesion of copper powder (rubbing residue), and breakage. Can be prevented.

  According to a second aspect of the present invention, there is provided the copper wire manufacturing method according to the first aspect, wherein the elastic means comprises a spring member.

  According to this copper wire manufacturing method, in addition to the above effects, the elastic means is made of a spring member, so that the structure of the wire drawing die and the die holder can be elastic between the two without complicating and increasing the size. Thus, a copper wire can be advantageously manufactured using a wire drawing jig that is inexpensive and capable of self-alignment.

  According to a third aspect of the present invention, the spring member is a plate-like spring member obtained by bending a plate material, the spring member is disposed between the wire drawing die and the die holder, and the spring member and the The contact engagement portion between the wire drawing dies and the contact engagement portion between the spring member and the die holder can be moved by fitting the spherical surfaces to each other. A method for producing a copper wire is provided.

  According to this copper wire manufacturing method, in addition to the above effects, the spring member is a plate-like spring member obtained by bending a plate material, and the spring member is disposed between the wire drawing die and the die holder. In addition, the contact engagement portion between the spring member and the wire drawing die and the contact engagement portion between the spring member and the die holder can be moved by fitting the spherical surfaces, respectively. With some degree of freedom in the movement of the wire drawing dies, the wire drawing dies can be mounted and supported on the die holder in an elastically and mechanically stable state. A copper wire can be advantageously manufactured using a wire-drawing jig that can be aligned.

  According to a fourth aspect of the present invention, there is provided the copper wire manufacturing method according to the first aspect, wherein the elastic means comprises an air cylinder or a hydraulic cylinder.

  According to this copper wire manufacturing method, in addition to the above effects, the elastic means comprises an air cylinder or a hydraulic cylinder, so that the elastic force can be freely adjusted according to the load caused by the wire drawing or Due to the elastic action of the hydraulic cylinder, the shaft hole or axis of the wire drawing die can be easily adjusted, and the wire drawing die can be attached and supported with appropriate force by adjusting the elastic force. A copper wire can be advantageously manufactured using a wire drawing jig that is practical and self-aligning.

  According to the copper wire manufacturing method of the present invention, it is possible to easily adjust the axial hole or the axial line of the wire drawing die in accordance with the change of the wire drawing pass line of the copper wire, and thereby, there is no disconnection or the like. The wire can be drawn, and the quality of the copper wire as a product and the production yield can be stabilized.

The manufacturing method of the copper wire which concerns on one embodiment of this invention, (a) The top view of a continuous wire drawing machine, (b) The front view which shows the state which attached the plate-shaped spring member to the wire drawing die, (c ) Front view showing a state in which a wire drawing die with a plate-like spring member attached is attached to a die holder, (d) Front sectional view showing a state in which a plate-like spring member is attached to a wire drawing die, (e) Same as above. (F) Front sectional view showing a state in which a wire drawing die having a plate-like spring member attached thereto is attached to the die holder, (g) Side sectional view showing a positional relationship between the wire drawing die and the die holder It is. It is explanatory drawing which shows the condition which draws a copper wire through several wire drawing dies using a continuous wire drawing machine, (a) The situation explanatory drawing when the shaft hole or axial center of an adjacent wire drawing die | dye does not correspond (B) It is a situation explanatory view in case the shaft hole or axial center of an adjacent wire drawing die corresponds. It is a front view which shows the state which made the coil-shaped spring member act between the wire drawing dies and the die holder regarding the manufacturing method of the copper wire which concerns on other embodiment of this invention. It is a front view which shows the state which made the air cylinder or the hydraulic cylinder act between the wire drawing dice | dies and the die holder regarding the manufacturing method of the copper wire which concerns on further another embodiment of this invention. (A) a top view of a continuous wire drawing machine, (b) a side cross-sectional view showing a state in which a wire drawing die is attached to a die holder, and (c) a copper wire through the wire drawing die. It is explanatory drawing which shows the condition which draws. It is explanatory drawing which shows the condition which draws a copper wire through several wire drawing dies using the continuous wire drawing machine regarding the manufacturing method of the copper wire which concerns on the prior art example.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.

  As described above, FIG. 1 relates to a copper wire manufacturing method according to an embodiment of the present invention, (a) a top view of a continuous wire drawing machine, and (b) a plate-like spring member attached to a wire drawing die. (C) Front view showing a state where a wire drawing die attached with a plate-like spring member is attached to a die holder, (d) A state where a plate-like spring member is attached to the wire drawing die. Front sectional view showing (e) Side sectional view same as above, (f) Front sectional view showing a state where a wire drawing die attached with a plate-like spring member is attached to a die holder, (g) Wire drawing die and die holder It is side surface sectional drawing which shows positional relationship with these. In addition, about the code | symbol of each drawing, in order to make the content easy to understand, the same reference numerals are given to members having the same structure and the same name including the conventional example (FIGS. 5 and 6).

  In FIG. 1A, using a continuous wire drawing machine 3 having a pair of cone-type drawing capstans 1 and 2, a plurality of drawing wires attached and supported at predetermined positions between the drawing capstans 1 and 2, respectively. Through the wire die 4, the copper wire 5 is successively drawn finely. Reference numeral 6 denotes a wire drawing die group including a plurality of wire drawing dies 4. The drawing capstans 1 and 2 are driven and rotated by motors (not shown). Here, the copper wire 5 is fed out from a delivery reel (not shown), makes a half turn around a predetermined position on each of the drawing capstans 1 and 2, and repeatedly travels between the drawing capstans 1 and 2. Construct a wire drawing pass line. The plurality of wire drawing dies 4 are respectively attached and supported by a plurality of die holders 7 fixed on the wire drawing pass line by welding, screwing or the like. In addition, 8 is a stopper which determines the passage position of the copper wire 5 which passes on the drawing capstans 1 and 2, respectively. Reference numeral 9 denotes liquid lubricating oil or water supplied on the traveling copper wire 5 when the copper wire 5 is drawn.

  The wire drawing die 4 is attached to the die holder 7 as shown in FIGS. 1 (b), (c), (d), (e), (f), and (g). First, FIGS. As shown in (e), on the outer periphery of the wire drawing die 4, a plate-like spring member 10 having a desired spring property is attached as an elastic means by bending a plate material into a circular shape. As shown in FIG. 1 (e), the spring member 10 is attached by providing a spherical groove 11 at a predetermined position on the outer peripheral surface of the wire drawing die 4, and correspondingly to the spring member 10 by bending. A spherical protrusion 12 is formed on the inner side of the groove, and the protrusion 12 is attached by fitting into the groove 11. On the other hand, the wire drawing die 4 with the spring member 10 attached thereto is attached to the die holder 7 as shown in FIG. 1C, and the spring member 10 acts between the wire drawing die 4 and the die holder 7. By doing so, the wire drawing die 4 is elastically supported by the die holder 7. In addition, as shown in FIG. 1 (g), a spherical groove 13 is provided at a predetermined position on the inner surface of the die holder 7, and the spherical surface is formed outside the spring member 10 by the bending process correspondingly. A protrusion 14 is formed and attached by fitting the protrusion 14 into the groove 13 (see FIG. 1 (f)). In this way, the wire drawing jig 15 as shown in FIGS. The material of the spring member 10 must be able to withstand at least the stress applied at the time of wire drawing. As long as this condition is satisfied, the material is not limited to a metal such as iron or aluminum, but a high-strength plastic. May be used.

  According to this wire drawing jig 15, the spring member 10 is disposed between the wire drawing die 4 and the die holder 7, and the spring member 10 is acted between them to thereby draw the wire drawing die 4. In addition to elastically supporting the holder 7, the contact engagement portion between the spring member 10 and the wire drawing die 4 and the contact engagement portion between the spring member 10 and the die holder 7 are respectively formed on the spherical surfaces described above. By being configured so as to be able to move by fitting each other, the wire drawing die 4 is elastically and mechanically attached to the die holder 7 with some degree of freedom in the movement of the wire drawing die 4 (movement in the XY direction). It can be attached and supported in a stable state. According to the wire drawing jig 15, the adjustment of the shaft hole or the axis of the wire drawing die 4 is easy, and adjustment errors due to the experience of the operator can be eliminated.

  Using the continuous wire drawing machine 3 of FIG. 1 (a) in which such wire drawing jigs 15 are set at predetermined positions, a situation where the copper wire 5 is drawn through a plurality of wire drawing dies 4 is observed. The result is shown in FIG. According to FIG. 2B, it can be seen that the shaft holes or the shaft centers of the adjacent wire drawing dies 4 are coincident with each other, and the wire drawing state is good. Note that FIG. 2A shows the wire drawing state when the shaft hole or the shaft center of the adjacent wire drawing dies 4 do not coincide with those in FIG. 2B. As shown in FIG. 2A, when the shaft hole or the shaft center of the adjacent wire drawing dies 4 do not coincide with each other, as already described, if the wire drawing operation is continued in this state, When an extra load such as a bending load is applied to the wire 5, the copper wire 5 is stretched or twisted, and a disconnection occurs. Further, since the surface of the copper wire 5 locally hits the shaft hole of the wire drawing die 4 (deviation), the copper wire 5 vibrates during wire drawing and a large amount of copper powder is placed in the shaft hole of the wire drawing die 4. Due to adhesion of (rubbing residue), the surface of the copper wire 5 after drawing is damaged, and there is a problem that breakage occurs frequently.

  According to the copper wire manufacturing method of the present embodiment, the wire drawing die 4 is elastically supported by the die holder 7 by causing the spring member 10 to act between the wire drawing die 4 and the die holder 7. Even if the drawing pass line of the copper wire 5 is changed by drawing the copper wire 5 through the drawing die 4 that is elastically supported as described above, an extra load such as a bending load is applied to the copper wire 5. Since the wire drawing die 4 can be automatically aligned so as not to be added, the shaft hole or axis of the wire drawing die 4 can be easily adjusted in response to changes in the wire drawing pass line of the copper wire 5. As a result, good wire drawing without disconnection or the like can be performed, and the quality of the copper wire as a product and its production yield can be stabilized. In particular, when the continuous wire drawing machine 3 is used to continuously and thinly draw the copper wire 5 through the plurality of wire drawing dies 4, the axial holes or the axes of the adjacent wire drawing dies 4 may not match. However, it is possible to prevent the occurrence of breakage due to elongation or twisting of the copper wire 5, damage due to vibration or adhesion of copper powder (rubbing residue), and breakage, which are problems in this case. In this case, it goes without saying that the spring member 10 exhibits a vibration isolation function. Further, by using the wire drawing jig 15 having the above-described configuration, that is, the contact engagement portion between the spring member 10 and the wire drawing die 4 and the contact engagement portion between the spring member 10 and the die holder 7 are respectively provided. By using the wire drawing jig 15 configured to be movable by fitting between the spherical surfaces, the wire drawing die 4 is flexibly attached to the die holder 7 with a certain degree of freedom in the movement of the wire drawing die 4. In addition, the copper wire 5 can be advantageously attached by using a wire drawing jig 15 that can be mounted and supported in a mechanically stable state, and thus can be self-aligned with a simple structure, low cost, and stable support structure. Can be manufactured.

  FIG. 3 relates to a method of manufacturing a copper wire according to another embodiment of the present invention, and shows a state in which a coiled spring member 16 is applied between the wire drawing die 4 and the die holder 7. It is a front view of the jig 17 for wire drawing. The difference from the wire drawing jig 15 shown in FIG. 1 (c) is that instead of the plate-like spring member 10 formed by bending a plate material into a circular shape, the coil-like spring member 16 is vertically and horizontally. It is the point which arranged each. Also by this, by drawing the coil-shaped spring member 16 between the wire drawing die 4 and the die holder 7, the wire drawing die 4 can be elastically attached to and supported by the die holder 7. FIG. The same technical effect as in the case of (c) can be obtained.

  FIG. 4 relates to a method of manufacturing a copper wire according to still another embodiment of the present invention. An air cylinder or a hydraulic cylinder 18 is allowed to act between the wire drawing die 4 and the die holder 7. It is a front view of the jig 19 for wire drawing which shows the state. A difference from the wire drawing jig 15 shown in FIG. 1C is that an air cylinder or a hydraulic cylinder 18 is used instead of the spring member 10. Also by this, by drawing an air cylinder or a hydraulic cylinder 18 between the wire drawing die 4 and the die holder 7, the wire drawing die 4 can be elastically attached to and supported by the die holder 7. The same technical effect as in the case of 1 (c) can be obtained.

  The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention.

DESCRIPTION OF SYMBOLS 1, 2 Drawing capstan 3 Continuous wire drawing machine 4 Wire drawing die 5 Copper wire 6 Wire drawing die group 7, 20 Die holder 8 Stopper 9 Lubricating oil or water 10, 16 Spring member 11, 13 Groove 12, 14 Protrusion part 15 , 17, 19 Wire drawing jig 18 Air cylinder or hydraulic cylinder

Claims (4)

  In a copper wire manufacturing method for thinly drawing a copper wire using a wire drawing die, the wire drawing die is attached to and supported by a die holder fixed on a wire drawing pass line of the copper wire, and the wire drawing is performed. An elastic means is applied between the wire die and the die holder to elastically support the wire drawing die on the die holder, and the copper wire is drawn through the wire drawing die supported more elastically. A method for producing a copper wire, characterized by comprising:   The method of manufacturing a copper wire according to claim 1, wherein the elastic means is a spring member.   The spring member is a plate-like spring member obtained by bending a plate material, and the spring member is disposed between the wire drawing die and the die holder, and the spring member and the wire drawing die are in contact with each other. 3. The method of manufacturing a copper wire according to claim 2, wherein the engaging portion and the abutting engaging portion between the spring member and the die holder are configured to move by fitting between spherical surfaces.   The copper wire manufacturing method according to claim 1, wherein the elastic means is an air cylinder or a hydraulic cylinder.

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