JP2007283432A - Shaving method for wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaving method for a wire, effectively cooling the knife edge of a die. <P>SOLUTION: In this shaving method for a wire, a first injector 8 and a second injector 10 are fixed at positions different from each other. The direction of a nozzle 9 of the first injector 8 is adjustable. The direction of a nozzle 11 of the second injector 10 is also adjustable. While cooling liquids 12, 13 are injected to the knife edge 14 of the die 4 from the plurality of injectors 8, 10, shaving is performed. Preferably the direction of the nozzle is adjusted so that the cooling liquid 12 injected from the first injector 8 is directly applied to the knife edge 14 of the die 4. Preferably the direction of the nozzle 11 is adjusted so that the cooling liquid 13 injected from the second injector 10 is directly applied to the knife edge 14 of the die 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wire shaving method.

Shaving may be performed in the manufacturing process of a wire. Shaving is also referred to as peeling. Shaving is performed by passing a wire through a die. The surface of the wire is shaved off by shaving. By this shaving, the surface flaws of the wire can be removed. This shaving can increase the metallic luster of the wire. Shaving is usually performed as a wire finishing process. Japanese Patent Laid-Open No. 53-22684 discloses a shaving method in which a wire is peeled off and passed through a die.
Japanese Patent Laid-Open No. 53-22684

  The cutting edge of the die may be damaged during shaving. Examples of this damage include wear and chipping. Due to the damaged die of the cutting edge, wrinkles are likely to occur on the surface of the wire. Wires with wrinkles need to be shaved again. Shaving is performed without interruption over the entire length of the continuous long wire. The shaving is performed again over the entire length of the wire. The wire to be shaved is long. The shaving again requires labor and labor, and significantly increases the production cost of the wire.

  In order to suppress die damage, it is important to suppress the heat generation at the cutting edge. Heat generation can be suppressed by supplying the coolant to the blade edge. A typical coolant is cooling water. As a cooling liquid supply method, injection is conceivable. Injection is performed by an injection device. This injection device has a nozzle (injection nozzle). The injection device is fixed at a predetermined position near the die. Coolant is sprayed from the spray nozzle of the spray device toward the die.

  From the viewpoint of enhancing the cooling effect, it is preferable that the injected coolant accurately hits the cutting edge of the die. If the position where the cooling water hits is shifted, the cooling effect is lowered. When the position where the cooling water hits shifts, it is preferable that the deviation of this position is corrected. However, when the injection device is fixed, it is not possible to correct the deviation of the position where the coolant hits.

  An object of the present invention is to provide a wire shaving method that can enhance the cooling effect of a die and effectively suppress damage to the cutting edge of the die.

  In the method of shaving a wire rod according to the present invention, a plurality of injection devices whose nozzle directions can be adjusted are fixed at different positions. In this shaving method, shaving is performed while injecting a coolant from the plurality of injection devices onto the cutting edge of the die.

  Preferably, in the wire shaving method, the direction of the nozzle is adjusted so that each of the cooling liquid sprayed from the plurality of spraying devices directly hits the cutting edge of the die.

  The deviation of the position where the coolant hits is suppressed, and the cutting edge of the die during shaving is effectively cooled.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a diagram showing a state of a wire shaving method according to an embodiment of the present invention. In this shaving method, the wire 2 is passed through a die 4. This die 4 is also called a shaving die or a peeling die. In FIG. 1, the wire 2 is moving from the left side to the right side. The left side of FIG. 1 is the upstream side, and the right side of FIG. 1 is the downstream side. The moving direction of the wire 2 is the horizontal direction. By passing through the die hole 6 of the die 4, the surface of the wire 2 is scraped off. The wire 2 that has passed through the die hole 6 is wound, for example, by a winder (not shown).

  In this embodiment, two injection devices are used. A first injection device 8 and a second injection device 10 are provided in the vicinity of the die 4. The first injection device 8 and the second injection device 10 are arranged at predetermined positions in the vicinity of the die 4. The first injection device 8 is fixed. In other words, the relative positional relationship between the first injection device 8 and the die 4 cannot be changed. The second injection device 10 is fixed. In other words, the relative positional relationship between the second injection device 10 and the die 4 cannot be changed. The first injection device 8 has a nozzle 9. The second injection device 10 has a nozzle 11. The coolant 12 is injected from the first injection device 8 toward the die 4. The coolant 13 is injected from the second injection device 10 toward the die 4. The distance from the nozzles 9 and 11 to the die 4 is, for example, about 15 cm to 20 cm. The cooling liquids 12 and 13 are cooling water. This cooling water is, for example, industrial water. In the present invention, the type of the coolant is not limited.

  In general, fan-shaped, full-cone type, empty-cone type, straight type, etc. are known as the injection pattern of the injection nozzle. The spray pattern of the nozzles 9 and 11 is a straight-ahead type. In other words, the injection nozzles 9 and 11 are linear nozzles. The injection angle of the injection nozzles 9 and 11 is almost 0 degrees. The straight nozzle is suitable for local injection because the liquid injection range can be narrowed. From the viewpoint of increasing the cooling effect by intensively supplying the coolant to the portion of the die 4 cutting edge 14, the spray pattern of the spray nozzle is preferably a straight type. In the present invention, the spray pattern of the spray nozzle is not limited.

  The fixed position of the first injection device 8 and the fixed position of the second injection device 10 are different from each other. The first injection device 8, the second injection device 10, and the wire 2 are on substantially the same horizontal plane. As viewed from the downstream side, the first injection device 8 is disposed on the right side of the wire 2, and the second injection device 10 is disposed on the left side of the wire 2. The position of the first injection device 8 and the position of the second injection device 10 are substantially symmetric with respect to the wire 2. In the present invention, the position of the injection device is not limited. The number of injection devices may be three or more. The number of spray nozzles may be three or more.

  The cooling liquid is simultaneously injected from the plurality of injection devices 8 and 10. Shaving is performed while simultaneously injecting the coolant with the plurality of injection devices 8 and 10.

  FIG. 2 is an enlarged view showing a state in which the coolants 12 and 13 are hitting the die 4. In FIG. 2, the description of the wire 2 is omitted. The wire 2 is cut by the cutting edge 14 of the die 4. The chipping or wear of the cutting edge 14 causes wrinkles on the surface of the wire 2. By cooling the blade edge 14, chipping and wear of the blade edge 14 are suppressed.

  As described above, the relative positional relationship between the injection devices 8 and 10 and the die 4 cannot be changed. Therefore, if the direction of the nozzle of the injection device does not change, the position where the coolant hits cannot be adjusted.

  The injection devices 8 and 10 of this embodiment can adjust the direction of the nozzles 9 and 11. FIG. 3 is an enlarged view of the first injection device 8. The first injection device 8 and the second injection device 10 are the same injection device. Therefore, FIG. 3 is also an enlarged view of the second injection device 10.

  The injection device 8 has a ball joint mechanism 16. The injection device 8 includes a nozzle 9 and a base portion 17. The nozzle 9 has a spherical convex surface 19. The base 17 has a spherical concave surface 21. The radius of curvature of the spherical convex surface 19 and the radius of curvature of the spherical concave surface 21 are substantially equal. There is substantially no gap between the spherical convex surface 19 and the spherical concave surface 21. The injection device 8 is configured such that the direction of the nozzle 9 can be adjusted by the ball joint mechanism 16. The ball joint mechanism 16 can change the direction of the nozzle 9 in any direction. By adjusting the direction of the nozzle 9, the coolant can be accurately applied to the blade edge 14. The structure of the injection device 10 is the same as that of the injection device 8.

  From the viewpoint of enhancing the cooling effect of the cutting edge 14, the coolant 12 is sprayed so as to directly contact the cutting edge 14. The half (half circumference) of the blade edge 14 is included in the range where the coolant 12 directly hits. In FIG. 2, a range A <b> 1 where the coolant 12 directly hits is indicated by solid line hatching. This range A1 includes half (half circumference) of the cutting edge 14.

  Similarly, from the viewpoint of enhancing the cooling effect of the cutting edge 14, the coolant 13 is sprayed so as to directly hit the cutting edge 14. The half (half circumference) of the blade edge 14 is included in the range where the coolant 13 directly hits. In FIG. 2, a range A <b> 2 where the coolant 13 directly hits is indicated by alternate long and short dashed lines. This range A2 includes half (half circumference) of the cutting edge 14.

  From the viewpoint of enhancing the cooling effect of the cutting edge 14, the direction of the nozzle is adjusted so that the portion of the cutting edge 14 included in the range A1 is different from the portion of the cutting edge 14 included in the range A2. In other words, the injection device 8 and the injection device 10 are adjusted so that the coolant directly hits different portions of the cutting edge 14. From the viewpoint of further enhancing the cooling effect of the cutting edge 14, the orientation of the nozzle is adjusted so that the portion of the cutting edge 14 included in the range A1 and the portion of the cutting edge 14 included in the range A2 do not overlap. A range obtained by combining the portion of the blade edge 14 included in the range A1 and the portion of the blade edge 14 included in the range A2 includes the entire blade edge 14 (entire circumference). From the viewpoint of enhancing the cooling effect of the cutting edge 14, it is preferable that the coolant is directly sprayed on the entire cutting edge 14 (entire circumference).

The die hole diameter D is determined based on the finished shaving dimension. In order to directly inject the cooling liquid to the entire circumference of the die cutting edge 14, the nozzle diameter and the injection angle need to be appropriately selected. In order to inject the coolant directly to the entire circumference of the die cutting edge 14, the diameter d1 of the range A1 is preferably equal to or larger than the die hole diameter D (d1 ≧ D), and further, the diameter d2 of the range A2 is the die hole diameter. It is preferable that it is D or more (d2 ≧ D). In order to inject the coolant directly to the entire circumference of the die cutting edge 14, the area S1 of the range A1 is preferably equal to or larger than the opening area [π (D / 2) ² ] of the die hole 6, and further, the range A2 The area S2 is preferably equal to or larger than the opening area [π (D / 2) ² ] of the die hole 6. It is preferable that the diameter of the range in which the coolant sprayed from the nozzles directly hit is equal to or larger than the die hole diameter D in all of the plurality of nozzles.

  In the present embodiment, the focal points of the cooling liquid ejected from the plurality of nozzles coincide. In other words, each of the coolant sprayed from the plurality of nozzles directly hits the cutting edge 14 of the die 4. Thereby, the cooling effect of the blade edge 14 is improved. Due to the improved cooling effect, damage to the die 4 is suppressed. Thereby, generation | occurrence | production of wrinkles is suppressed. Further, the life of the die 4 is extended by suppressing damage to the die 4.

  The die 4 may be changed depending on the specification of the wire 2 to be manufactured. Specifically, the hole diameter D of the die hole 6 and the thickness of the die 4 are changed. With this change, the position of the cutting edge 14 of the die 4 changes. With this change in position, the relative positional relationship between the injection devices 8 and 10 and the blade edge 14 changes. By adjusting the direction of the nozzle, the position where the coolant hits can be made to correspond to the change in the position of the blade edge 14.

  From the viewpoint of concentrating the spray liquid on the portion of the die 4 cutting edge 14 and increasing the spray pressure, the nozzle diameter of the spray nozzles 9 and 11 is preferably 7 mm or less, and more preferably 5 mm or less. From the viewpoint of increasing the injection amount per unit time and suppressing nozzle clogging, the nozzle diameter of the injection nozzles 9 and 11 is preferably 2 mm or more, and more preferably 3 mm or more.

  The direction in which the coolant 12 is ejected is different from the direction in which the coolant 13 is ejected. By injecting the coolant from different directions, the uniformity of cooling in the circumferential direction of the die hole 6 is enhanced.

  From the viewpoint of increasing the cooling efficiency, the injection amount of the cooling liquid from one nozzle is preferably 8 liters or more per minute, and more preferably 10 liters or more per minute. From the viewpoint of increasing the cooling efficiency, the injection pressure is preferably 0.3 MPa or more, and more preferably 0.45 MPa or more.

  In the present invention, an injection device capable of adjusting the direction of the nozzle is used. An example of this injection device is an injection device having a ball joint mechanism as described above. A specific example of an injection device having a ball joint mechanism is a nozzle using the UT series of Ikeuchi Co., Ltd.

  Another example of an injection device in which the orientation of the nozzle can be adjusted is shown in FIG. The injection device 20 includes a nozzle 22 and a hose portion 24 that can send liquid to the nozzle 22. The hose part 24 can be bent freely. The hose part 24 can hold the bent state freely. By this holding, the position of the nozzle 22 and the orientation of the nozzle 22 are maintained. By this holding, the direction of the injection nozzle can be adjusted.

  The present invention can be applied to a wire shaving method.

FIG. 1 is a diagram showing an embodiment of the shaving method of the present invention. FIG. 2 is a front view of the state in which the cooling water hits the die 4 as seen from the upstream side. FIG. 3 is a diagram showing an example of an injection device used in the present invention. FIG. 4 is a view showing another example of the injection device used in the present invention.

Explanation of symbols

2 ... Wire rod 4 ... Die 6 ... Die hole 8 ... Injection device (first injection device)
9 ... Nozzle 10 ... Injection device (second injection device)
DESCRIPTION OF SYMBOLS 11 ... Nozzle 12, 13 ... Coolant 14 ... Die cutting edge 20 ... Injection device 22 ... Nozzle 24 ... Hose part A1 ... It injected from 1st injection device Range in which the coolant is directly applied A2 ... Range in which the coolant injected from the second injection device is directly applied

Claims (2)

Fixing a plurality of injection devices that can adjust the orientation of the nozzles at different positions;
A shaving method for a wire, in which shaving is performed while spraying a coolant from a plurality of these spraying devices onto the cutting edge of a die. The wire shaving method according to claim 1, wherein the direction of the nozzle is adjusted so that each of the cooling liquid sprayed from the plurality of spraying devices directly hits the cutting edge of the die.

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