JP3360131B2 - Metal wire wrapping reel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel for winding a metal wire such as a metal wire and a metal stranded wire, and more particularly, to a saw wire used for cutting a hard material such as artificial quartz, silicon and ceramic. And a reel suitable for winding.

[0002]

2. Description of the Related Art As a reel for sending and winding a saw wire, an integral reel in which a winding drum and flanges at both ends are cut out of a structural carbon steel (for example, S45C) as an integral member, a winding drum and flanges at both ends. The winding drum is formed from structural carbon steel (for example, S45C), and the flange is made of chromium molybdenum tough steel (for example, SC).
M440), and a welding reel in which they are joined by welding, and an assembly reel in which three pieces of a winding drum and both end flanges are connected by bolts instead of by welding are conventionally known. Japanese Utility Model Laid-Open Publication No. 5-41663 discloses an example of the assembly reel. In addition, 5-3
Japanese Unexamined Patent Publication No. 9856 discloses an unwinding reel that can be disassembled so that a used wire can be wound up from a reel on the winding side and disposed in a wound state.

[0003]

The one-piece reel in which the winding drum and the flange are cut out as one piece can increase the rigidity so that it can withstand repeated use. It ’s expensive, expensive,
Due to the solid structure, the total weight is increased, so that it is not easy to handle and the transportation cost is increased.

In the case of an assembly reel connected by bolts,
Since each part can be formed by forging etc. without cutting, material cost and processing cost can be reduced, and the weight can be reduced as a hollow structure, but when winding or winding the wire, the wire winding tension is reduced. Since the winding drum is deformed by the tightening force generated due to it, and the flanges at both ends are pushed and spread in the direction away from each other by the generated expanding force, a gap is created between the flange and the winding drum, and the gap is formed in the gap. Troubles such as the bite of the wire occur. In addition, the reason why the bolt connection is used is to disassemble the reel after use and disassemble the wire while taking up the wire, but in reality, it is not easy to remove the bolt because the above-mentioned pushing force is applied. In addition, the threaded portion of the bolt and nut is easily crushed and cannot be disassembled and assembled many times.

On the other hand, in the case of a welding reel, as in the case of an assembly reel, a hollow structure can be used to reduce material and processing costs, reduce weight, and be integrated by welding. In such a case, there is no trouble that a gap is formed between the flange and the winding drum and the wire bites. However, in the conventional three-piece welding reel described above, which is divided into a winding drum and flanges at both ends and welded, for example, for a saw wire, when used under severe conditions, cracks enter from the welded portion and break. Problem has occurred. In the case of a three-piece welded reel, the welded portion is somewhat inward from the corner at the boundary between the winding drum and the flange so that the portion that becomes brittle under the influence of heat from welding does not overlap the corner where the maximum stress is applied. Nevertheless, the shape of the groove of the butt for welding is spread, for example, in a V-shape, and the heat-affected zone is wide. Cannot be kept sufficiently far away, and when used under severe conditions, the welded portion will be in a severe state in terms of strength.

[0006] A saw wire reel is wound with a saw wire at a wire manufacturer and shipped to a user. Then, the user mounts the reel on the wire saw device, cuts, for example, a silicon wafer with the saw wire fed from the reel, and winds the wire on another empty reel. Then, the reel on which the used saw wire has been wound is returned to the manufacturer, unwrapped by the manufacturer, wound with a new saw wire, and shipped again to the user. Thus, the reel is used repeatedly. There are various kinds of saw wires having a wire diameter of, for example, 0.16 mm and 0.18 mm, and a reel is designed to wind them by a predetermined amount, for example, 60 kg or 20 kg. The winding tension when the saw wire is wound around the reel in the manufacturer is about 1 kg, whereas the winding tension when the user uses the saw wire and winds it is as large as, for example, about 2.5 kg. As a result, a large tightening force and a large spreading force are applied, so that the welded portion near the corner where the maximum stress is applied is in a severe condition in terms of strength.

Therefore, a reel for winding a metal wire for saw wire or the like can be reduced in material cost and processing cost and can be reduced in weight, and can be welded even under severe operating conditions. It is an object of the present invention to provide a large resilient force that can be used repeatedly without being damaged from the ground.

[0008]

According to the present invention, there is provided a reel for winding a metal filament, comprising two members formed by forging the halves on both sides in the axial direction of the winding drum and the flange at one end thereof. The end faces on the winding drum side of these two members are joined by welding.

[0009] The breakage of a welding reel is generally such that a large stress is applied to a portion (heat-affected portion) that becomes brittle under the influence of heat due to welding, so that the portion is cracked and broken. In the case of the reel according to the invention, the weld is 1
There are few places that can cause breakage, and the welded part is located in the center of the winding drum, far from the corner at the boundary between the winding drum and the flange, and is not easily affected by the maximum stress applied to the corner part Therefore, damage from the welded portion can be avoided, and it can withstand severe use conditions. And this reel is formed by welding joining of two members, and the two members consist of each half on both sides in the axial direction of the winding drum and a flange at each end, and each is formed by forging, Compared with a single-piece reel, the material cost is lower, the processing is easier, the manufacturing cost can be reduced, and the weight can be reduced. Further, since each member constituting the reel is a forged product, the flow of metal structure (metal flow) is continuous without being cut as in the case of shaving,
Strong and resilient. In addition, each member that is a forged product has a higher machining accuracy than a case where it is machined, so that a reel with good rotation balance can be obtained.

[0010] In the reel, an R portion is preferably formed at a boundary corner portion between the winding drum and each flange so as to prevent stress concentration due to a notch effect. If the radius is small, the notch effect cannot be suppressed, and if the radius is large, the wire cannot be wound well. Therefore, the radius of the R portion is set in consideration of the notch effect and the winding property according to the wire diameter of the wire to be wound.

Further, the surface roughness of the R portion is JIS B
10 μm at the maximum height (Rmax) specified by 0601
It is better to do the following. The surface roughness of Rmax of 10 μm or less is obtained by, for example, lapping after lathing. When finished only by lathe processing, the surface roughness is not less than 10 μm in Rmax, and in that case, under severe conditions of use, the starting point of cracking occurs at the boundary corner between the winding drum and the flange, May spread and the reel may be damaged. However, by finishing the R portion to a surface roughness of 10 μm or less in Rmax by polishing, it is possible to prevent the occurrence of a crack starting point at the boundary between the winding drum and the flange. In addition, the effect of preventing cracking becomes more reliable when Rmax is set to 7.0 μm or less.

In order to save material and reduce the weight, it is preferable that the winding drum has a hollow cylindrical shape. In such a case, in order to prevent the winding drum from being constricted by a tightening force when the wire is wound, the winding drum shaft is used. It is preferable to apply a reinforcing member such as a ring from the inside to the joint located at the approximate center in the direction.

In order to prevent scattering of the reel due to lateral pressure (wire pushing force acting on the flange) when the reel is broken, a connecting bar for connecting the flanges at both ends is provided inside the winding drum. Is good.

The material of the two members constituting the reel is made of chromium molybdenum tough steel, such as SCM, which has a large yield point and a high tensile strength, a large restoring force, and is resistant to repeated use.
440, and if so, after welding,
As a heat treatment for imparting toughness, oil quenching and tempering may be performed.

The reel according to the present invention is particularly suitable for saw wires, and has a low manufacturing cost, is lightweight, tough, has no damage from a welded portion, has a large restoring force, and can be repeatedly used under severe conditions. Can be used.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a saw wire reel according to the present invention, and FIG. 2 is a side view of the same. This reel is a two-piece welded reel composed of two members 1A and 1B formed by forging a chromium molybdenum tough steel (SCM440) as a material. The two members 1A and 1B are
A cylindrical portion 2a corresponding to one half of the winding drum 2 in the axial direction and a flange 3 at one end are integrally formed, and have the same shape and size. The end surfaces of these two members 1A and 1B on the winding drum side (the cylindrical portion 2a side) are welded to each other.
The cylindrical portions 2a, 2a of these two members 1A, 1B welded together form the reel winding drum 2. Thus, a reel including the winding drum 2 and the flanges 3 and 3 at both ends is configured.

The two members 1A and 1B are forged,
After the rough finish to remove black scale, the end face on the winding drum side is packed in dimensions, and the groove for welding is cut into a V-shape, and the inner edge of the end is cut into a ring shape. Is formed. A reinforcing ring 5 is applied from the inside between the grooves 4 and 4 of the two members 1A and 1B, and the two members 1A and 1B and the reinforcing ring are spaced apart from each other with the groove between which the reinforcing ring 5 is interposed. 5 are integrally welded. In FIG. 1, reference numeral 6 indicates a welded portion.

A connection bar 7 for preventing scattering is provided inside the winding drum 2 so as to connect the flanges 3 of the members 1A and 1B to each other at a position facing the inner periphery of the reinforcing ring 5 with the axis therebetween.
Are provided. The connecting bar 7 is made of carbon steel (S45
A round bar made of C) is inserted into holes formed in the flanges 3 and 3 at both ends and fixed by welding.

After the two members 1A and 1B are welded and joined together with the reinforcing ring 5 and the two connecting bars 7 and 7 for preventing scattering are fixed by welding, thermal distortion due to welding is removed and toughness is imparted. For this purpose, the entire reel is subjected to heat treatment such as oil quenching and tempering. In this heat treatment, oil quenching is performed at 860 ° C. for 2.5 hours and then tempering is performed at 600 ° C. for 5 hours in accordance with, for example, JIS standards.

After the heat treatment, the entire outer surface of the reel is finished by a lathe. Further, an R portion 8 is formed at a boundary corner between the winding drum 2 of each of the members 1A and 1B and each of the flanges 3 so as to prevent a notch effect. At this time, the radius of the R portion 8 is set according to the wire diameter of the wire, and is finished to a value as large as possible without causing poor winding. For example, on a reel that winds a saw wire with a wire diameter of 0.16 mm,
The radius of the set R portion 8 is about 1.5 mm. Then, after processing by the lathe, the R portion 8 is finished to a surface roughness of 10 μm or less (preferably 7.0 μm or less) in Rmax by lapping.

After finishing the lathe, shaft holes 9 for mounting a reel to a wire saw device are formed on the outer surfaces of the shaft centers of the flanges 3 and 3 at both ends.
A threaded hole 10 for suspending the reel when mounting and removing the reel to and from the wire saw device is formed in the bottom of the wire saw device. Kick holes 11 are formed on two outer surfaces of the flanges 3 and 3 opposite to each other with the axis therebetween to start the rotation of the reels. Screw holes 12 for hoisting the reel in a sideways state are machined in four places.

In the examples shown in FIGS. 1 and 2, a ring (reinforcing ring) is used as a reinforcing member for preventing the winding drum from being constricted. However, the reinforcing member may have a disk or another shape or structure. .

Further, the reinforcing member may be provided in another space inside the winding drum other than the welding location, or may be provided at a plurality of locations.

In the example shown in FIGS. 1 and 2, two connecting bars for preventing scattering are provided.
It may be a book. However, it is usually preferable to provide two or more.

The present invention can also be implemented as a reel for winding a metal wire other than a saw wire. And a reinforcing member (reinforcing ring) to prevent constriction of the winding drum
May be omitted depending on the use of the reel, the use conditions, and the like, and the connecting bar for preventing scattering may be omitted depending on the use, the use conditions, and the like.
Further, as for the material of the forged product constituting the reel, it is possible to use chromium molybdenum tough steel other than SCM440, or other alloy steel or carbon steel, depending on the use and use conditions. Regarding the heat treatment after welding, depending on the application and the use conditions, it is also possible to simply relax and remove the residual stress and perform the intended normal annealing. However, for example, in the case of a reel for saw wire used under particularly severe conditions, a reinforcing member (reinforcing ring) for the winding drum and a connecting bar for preventing scattering are necessary. It is necessary to perform oil quenching and tempering as a subsequent heat treatment.

Further, the surface of the reel may be subjected to a surface treatment such as blackening or metal plating (for example, chrome plating), so that rust can be prevented from occurring and the life of the reel can be extended. .

[0028]

According to the present invention, since the reel for winding a metal filament is a welded reel formed by welding and joining two members formed by forging, the material cost and the processing cost can be reduced and the weight can be reduced. Can be formed and the number of welds is 1
Since the portion is far from the portion where the maximum stress is applied, breakage from the welded portion can be avoided even under severe use conditions, the restoring force is large, and the device can be made resistant to repeated use.

Further, by forming an R portion at a boundary corner portion between the winding drum and each flange, breakage due to a notch effect can be prevented. In particular, the surface roughness of the R portion is 10 μm or less in Rmax (maximum height). By doing so, it is possible to prevent the occurrence of a crack starting point at the boundary corner between the winding drum and the flange even under severe use conditions.

Further, by applying a reinforcing member such as a ring from the inside to the joining portion of the winding drum, it is possible to prevent the winding drum from being constricted due to the tightening force of the wire.

Further, by providing a connecting bar for connecting the flanges at both ends, it is possible to prevent the reel from being scattered by the side pressure when the reel is cracked.

Also, the reel and the flange of the reel are formed of chromium molybdenum toughened steel, and oil quenching and tempering are particularly performed as heat treatment after welding, so that the reel is more tough, has a large restoring force, and is resistant to repeated use. It can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of a saw wire reel according to the present invention.

FIG. 2 is a side view of a saw wire reel according to the present invention.

[Explanation of symbols]

 Reference Signs List 1A, 1B member 2 winding drum 2a cylindrical portion 3 flange 4 R portion 6 reinforcing ring 7 welded portion 8 connecting bar

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-7580 (JP, A) JP-A-62-222976 (JP, A) JP-A-64-13380 (JP, A) JP-A 49-79 JP-A-5-96327 (JP, A) JP-A-6-145879 (JP, A) JP-A-62-110818 (JP, A) JP-A-9-295768 (JP, A) Japanese Utility Model Showa 57-71166 (JP, U) Japanese Utility Model Showa 57-11162 (JP, U) Japanese Utility Model Hei 5-39856 (JP, U) Japanese Utility Model Showa 37-10124 (JP, Y1) Tokio Hei 6-507873 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 75/14 B65H 75/18

Claims (5)

(57) [Claims] The present invention uses two members formed by forging the halves on both sides in the axial direction of the winding drum and the flange at one end by forging, and joining the end surfaces of the two members on the winding drum side by welding. In the metal wire winding reel formed as described above, an R portion is formed at a boundary corner between the winding drum and each flange.
The maximum height Rmax of the surface roughness of the R portion is 10 μm
And the flanges at both ends inside the winding drum
And a connecting bar for preventing scattering of the metal wire. 2. The reel according to claim 1 , wherein the winding drum has a hollow cylindrical shape, and a reinforcing member is applied to a joining portion from inside. 3. A process according to claim 1 or 2 metal striatum winding wearing reel according materials of the two members is chromium molybdenum tough steel. 4. The reel according to claim 3 , wherein oil quenching and tempering are performed as heat treatment after welding. 5. The metal wire according to claim 5, wherein the metal wire is a saw wire.
Item 5. A reel for winding a metal filament according to any one of Items 1, 2, 3 and 4 .