JP2002066678A - Manufacturing method of spiral corrugated wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a spiral corrugated wire capable of costlessly and continuously manufacturing a spiral corrugated wire having a bending strength and a faborable quality. SOLUTION: A plurality of displacement pieces 33 provided with a pressing face 34 pressurizing the wire and the displacement pieces are arranged parallel to each other in the moving direction of the wire. The manufacturing device is provided with a piece-fixing body 12 capable of adjusting the fixing position of the displacement pieces 33 and a rotating device rotating the piece-fixing body 12 around the rotary center axis O parallel to the moving direction of the wires. After pitches between respective displacement pieces and the displacement 6 of respective displacement pieces 33 from the rotary center axis O are set in advance, while moving the wires to the piece-fixing body 12 at a specified feed speed, the piece-fixing body 12 is rotated in a specified number of revolution to impart a force to the peripheral face of the wire by the pressurizing face 34. In this way, the spiral wire curved in a corrugated fashion can be continuously manufactured out of a coiled wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a spirally-shaped spirally-shaped wire rod.

[0002]

2. Description of the Related Art Conventionally, a method for producing a corrugated wire has been known. For example, as shown in FIG.
No. 79434 discloses that a wire 41 is formed by a pair of rollers 42.
A device 48 that nips at 42 and intermittently feeds through the wire guide 43, and the upper and lower molds 44 disposed at the exit of the wire guide 43 alternately push and bend the wire material 41 up and down to form a zigzag shape. Wire 45
6 is disclosed. Also, Japanese Patent Application Laid-Open
In JP-A-25680, two disks provided with a large number of corrugating pins on the periphery are vertically arranged, a wire is inserted between the disks, and the two disks are rotated to corrugate the wire. A method for manufacturing a corrugated wire by pressing and bending with a pin is disclosed.

[0003]

However, the prior art described above has the following problems. (A) The conventional methods for producing the above-mentioned corrugated wire include:
This is a method in which a moving wire is pressed and bent alternately up and down to form a zigzag shape. Since the bending direction is limited to two dimensions (within a predetermined plane), the bending strength of the formed wire cannot be increased. There are issues. (B) Further, in the conventional method, there is a problem that it is difficult to set the timing and strength of pushing and bending up and down, and that the processing pitch of the manufactured corrugated wire tends to change due to the consumption of the mold. (C) Further, in the conventional method, in order to manufacture a corrugated wire having different specifications such as a processing pitch, it is necessary to replace a mold or the like, and there is a problem that it takes time to adjust the apparatus.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a method of manufacturing a spiral corrugated wire capable of solving the above problems. An example of a specific purpose is as follows. (a) To provide a method of inexpensively producing a three-dimensional spiral corrugated wire having high bending strength and good quality. (b) To provide a method for continuously producing a spiral-shaped corrugated wire of good quality. (c) To provide a manufacturing method capable of easily producing spiral corrugated wires having different specifications such as processing pitch. It should be noted that the problems of the invention other than those described above and the means for solving the problems will be described in detail in the description in the following specification.

[0005]

The present invention will be described with reference to FIGS. 1 to 10 showing an embodiment of the present invention, for example. The first invention includes a plurality of displacement pieces 33 having a pressing surface 34 for pressing a wire,
The plurality of displacement pieces 33 are arranged side by side in the moving direction of the wire, and the piece fixed body 12 capable of adjusting the fixing position of the displacement pieces 33, and the piece fixed body 12 is rotated around the rotation center axis O parallel to the moving direction of the wire. The pitch L between the displacement pieces and the displacement amount δ of each displacement piece 33 from the rotation center axis O are set in advance based on the specification of the spiral corrugated wire to be manufactured. After that, the wire rod is moved to the frame fixing body 12 at a predetermined feed speed V, and
2 is rotated at a predetermined number of revolutions N, and the pressing surface 3 of each displacement piece 33 is rotated.
By applying a force to the peripheral surface of the wire in step 4, a spiral (three-dimensional) wire that is curved in a wave shape is continuously manufactured from a coil-shaped wire.

According to a second aspect of the present invention, the displacement amount of the most upstream displacement piece and the displacement amount of the most downstream displacement piece among the plurality of displacement pieces 33 fixed to the piece fixing body 12 are each equal to one of the diameter d of the wire rod. / 2. The third invention comprises a plurality of displacement pieces 33 fixed to the piece fixing body 12.
Of the displacement pieces δ of the third displacement piece counted from the upstream side
3 is set to the maximum. According to a fourth aspect of the present invention, each displacement piece 33 is constituted by a cylindrical body having a wire insertion hole 32,
The pressing surface 34 of the displacement piece 33 is formed of a convexly curved inner surface of a cylindrical body, and the pressing surface 34 is in contact with the wire in a convex manner with respect to the wire, thereby reducing the pressing area of the wire. I do.

In a fifth aspect of the present invention, a ratio (L / P) of a processing pitch P of the manufactured spiral corrugated wire to a pitch L of the displacement pieces is set in a range of 1.0 to 2.0. It is characterized by having. According to a sixth aspect of the present invention, the feed speed V (m / min) of the wire and the rotation speed N (rpm) are provided when the processing pitch P (mm) of the manufactured spiral corrugated wire is used.
N = V × 1000 × η ÷ P, where η = 0.75 to 2.0.

A seventh invention is characterized in that the feed speed V of the wire is set in a range from 3 m / min to 50 m / min. In the eighth invention, the rotation speed N of the frame fixed body 12 is set to 30 r.
pm to 1000 rpm.

The first to eighth inventions will be further described. In the first invention, a steel material is preferable as a wire that can be used. The displacement piece refers to a pressing body provided with a pressing surface 34. Displacement piece 3 fixed to piece fixed body 12
It is preferable that the number of 3 is set to an odd number. Further, it is preferable to set the number of displacement pieces to five.

[0010]

According to the first aspect, the pitch L between the displacement pieces and the displacement amount δ of each displacement piece from the rotation center axis O are determined in advance based on the specification of the spiral corrugated wire to be manufactured. After the setting, the wire is moved at a predetermined feed speed V to the piece fixed body, and the piece fixed body is rotated at a predetermined number of revolutions N to apply a force to the peripheral surface of the wire at the pressing surface of each displacement piece, thereby forming a wavy shape. Since curved and helical wires are continuously manufactured from coiled wires, a three-dimensionally helically shaped good corrugated wire with a high bending strength is produced much easier and at a lower cost than conventional methods. it can. Further, the spiral corrugated wire rod manufactured by changing the pitch L between the displacement pieces, the displacement amount δ of each displacement piece from the rotation center axis O, the feed speed V of the wire, and the number of revolutions N of the piece fixed body. Since the specifications such as the processing pitch P can be changed in a wide range, a plurality of types of spiral wavy wires can be easily formed.

According to the second aspect of the present invention, the displacement amount of the most upstream displacement piece and the displacement amount of the most downstream displacement piece among the plurality of displacement pieces fixed to the piece fixing body are each reduced to 1/2 of the diameter of the wire. By setting, the rotation center axis O and the center of rotation of the wire rod on the inlet side and the outlet side can be substantially matched,
It is possible to suppress the swing of the wire at the inlet side and the outlet side where the wire is supplied to the piece fixed body, and to stably produce a wire of a constant quality. According to the third aspect, of the plurality of displacement pieces fixed to the piece fixed body, the displacement amount of the third displacement piece counted from the upstream side is set to be the maximum,
It is possible to easily and stably produce a spiral corrugated wire of a certain specification.

According to the fourth aspect of the present invention, each displacement piece is constituted by a cylindrical body having a wire insertion hole, and the pressing surface of the displacement piece is constituted by a convexly curved inner surface of the cylindrical body. The convex contact with the wire reduces the pressing area of the wire, so that when each displacement piece is rotated around the rotation axis, the state in which the wire is pressed from the peripheral surface is the full rotation angle. It can be kept almost constant in the region. In addition, it is possible to reduce as much as possible scratches generated when the wire moves while the wire is pressed on the pressing surface of each displacement piece. According to the fifth aspect of the present invention, by setting the ratio in the above range, when the processing pitch of the helical wavy wire is manufactured to a predetermined length, the adjustment work becomes easy to perform, and the helical wavy wire of a constant quality is stabilized. Can be manufactured.

According to the sixth aspect of the present invention, when a desired processing pitch P is obtained, the feed speed V
By adjusting the number of rotations N, it is possible to provide a high quality spiral corrugated wire. According to the seventh aspect, a high-quality spiral corrugated wire can be provided by setting the feed speed of the wire in a range from 3 m / min to 50 m / min. According to the eighth aspect, a high-quality spiral corrugated wire can be provided by setting the rotation speed of the bridge fixed body in the range of 30 rpm to 1000 rpm.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram for explaining a spiral wavy wire manufacturing apparatus to which a method of manufacturing a spiral wavy wire according to the present invention is applied. As shown in FIG. 1, the spiral wavy wire manufacturing apparatus 1 is roughly divided into a wire feeder 2,
It includes a wire feeding section 3, a spiral wavy wire forming section 4, and a spiral wavy wire cutting section 5. The wire supply unit 2 is configured by a coil stand 7 in which the wire 6 is wound in a coil shape, and can supply the wire from the coil stand 7.

The wire feeding section 3 is constituted by a mechanism in which a pair of upper and lower pinch rollers 8 that sandwich the wire 6 from the coil stand 7 are arranged in two stages. Each pinch roller 8.8
Is rotated by the power from the motor 9 and feeds the wire 6 to the spiral wavy wire forming section 4 with the wire 6 sandwiched therebetween. The pinch rollers 8, 8 have a function of correcting the coil-shaped habit of the wire rod 6 to make it approximately linear. Spiral wavy wire forming part 4
Is configured to include a frame fixed body 12 and a rotating device for rotating the frame fixed body 12. The rotating device is the base 10
It comprises a pair of bearing devices 23 fixed above and a motor 24 as driving means, and the piece fixed body 12 is rotatably supported by the bearing devices 23. Since the wire feeding section 3 and the spiral wavy wire forming section 4 are constituted by a single motor 24, a synchronous system in which there is no deviation between the feeding and rotation of the wire is provided.

The spiral wavy wire cutting section 5 has a guide member 16 having a guide hole 15 for guiding a spiral wavy wire 14 extruded from the spiral wavy wire forming section 4, and a spiral shape positioned by the guide member 16. It comprises a cutting device 18 for cutting the corrugated wire 14 with a press upper blade 17 and a press receiving blade 19.

FIG. 2 is a front view for explaining a detailed configuration of a spiral wavy wire forming portion which is a characteristic portion of the present embodiment, and FIG. 3 is a vertical sectional view taken along the line III-III of FIG. As shown in FIG. 2, the piece fixing body 12 of the spiral corrugated wire forming section 4 has two steel plates 20, 20 arranged in parallel at a fixed interval, and both ends of the steel plates 20, 20 are connected to each other. Steel plate 21.2
1 and a support shaft 22 protruding from the circular steel plates 21
The frame fixing body 12 is rotatable by supporting the pair 22 with a pair of front and rear bearing devices 23. The motor 24 (see FIG. 1) is configured to be able to transmit rotational power via a transmission 38 by a pulley 25 provided at one end of the support shaft 22. The support shaft 2
An insertion hole or a space through which a wire is passed is provided at the axial center of the bearings 22 and the bearing devices 23.

The two steel plates 20 are spaced apart from each other by a distance L, which is an interval (pitch) at which displaced pieces are arranged.
By inserting the displacement piece holder 27 into the groove 26, the displacement piece holder 27 can be slid in the direction perpendicular to the paper of FIG. 2 (corresponding to the direction of arrow 28 in FIG. 3). It is configured in. In addition, in FIG. 2, since the embodiment using the first to fifth displacement pieces is shown, five grooves 26 are shown,
The number of grooves 26 may be increased so that five or more displacement pieces can be mounted. Further, the form in which the displacement piece is mounted on the piece fixed body 12 is not limited to the groove. Further, a configuration may be employed in which the pitch L of the displacement pieces can be freely changed. As such a method, there is a method in which a large number of grooves 26 are formed and the pitch L of the displacement pieces can be changed by appropriately selecting the grooves 26. FIG. 2 shows an example in which the grooves 26 are formed so that at least two types of pitches L can be formed. The pitch L of the displacement pieces to be scratched is the first.
It is preferable that the distance between the displacement piece and the fifth displacement piece is constant.
A different configuration may be employed as needed.

As shown in FIG. 3, holding plates 29, 29 are fixed to the two steel plates 20, 20 so as to be sandwiched from both sides.
And a pair of position adjusting bolts 31 for adjusting the position of the displacement piece holder 27 from both sides of the holding plate 29. By moving the position of each displacement piece 33 along the groove 26 by a pair of position adjusting bolts 31, the piece fixing body 12
The displacement amount of each displacement piece 33 with respect to the rotation center axis O can be set and maintained individually. Although FIG. 2 shows only the fourth displacement piece with the holding plate 29 attached thereto, actually, the holding plates of the first to third displacement pieces and the fifth displacement piece are similarly attached. .

FIG. 4 is a cross-sectional view of the displacement piece schematically showing a state in which the wire is pressed by the displacement piece. 3 and 4
As shown in the figure, a displacement piece 33 having a wire insertion hole 32 is fixed inside the displacement piece holder 27, and the displacement piece 33 is made of tool steel or carbide. As shown in FIG. 4, each displacement piece 33 is made of substantially cylindrical tool steel or carbide, and the insertion hole 32 of the wire has a small inner diameter at the center of the cylinder and moves toward the end of the cylinder. It has a convexly curved inner surface (indicated by a drum-shaped insertion hole 32 in FIG. 4) whose inner diameter gradually increases. In this way, by pressing the pressing surface 34 to the wire 6 in a convex manner, the pressing area of the wire 6 is reduced to keep the pressing state constant, and the wire 6 is applied on the pressing surface 34 of each displacement piece 33. It is possible to improve the manufactured spiral corrugated wire rod 14 (see FIG. 1) by reducing as much as possible the scratches generated when the wire rod 6 moves in a pressed state.

FIG. 5 is a schematic view showing a relationship between a displacement piece in the piece fixing body and a wire flowing through the insertion hole. In this embodiment, as described above, the first displacement piece K1, the second displacement piece K2, the third displacement piece K3, the fourth displacement piece K3 from the upstream side where the wire flows.
A displacement piece K4 and a fifth displacement piece K5 are provided. The displacement amount of each displacement piece is set by the displacement amount δ from the rotation center axis O.
When the displacement amount δ from each displacement piece increases, the force received by the pressing surface 34 of the displacement piece increases.

The first displacement piece K1 on the most upstream side of the displacement piece and the fifth displacement piece K5 on the most downstream side correspond to the entrance and the exit, so that the rotation center axis O of the piece fixed body 12 and the first displacement piece K1
And the wire 6 held by the pressing surface 34 of the fifth displacement piece k5
The pressing surfaces 34 of the first displacement piece K1 and the fifth displacement piece K5 are fixed in such a manner that they are displaced in one direction (the second reference surface 36 side) by half the diameter d of the wire so that the centers of the wire members coincide as much as possible. Is done. On the other hand, the second displacement piece K2 and the third displacement piece K
The third and fourth displacement pieces K4 mainly have a function of deforming the wire rod while spirally meandering, and the third displacement piece K3 can displace the wire rod toward the first reference surface 35 in FIG. Thus, the displacement amount δ3 from the rotation center is set to the maximum. The second displacement piece K2 and the fourth displacement piece K4 are the third displacement piece K4.
The displacement amounts δ2 and δ4 are set to the second reference surface 36 side so as to be in the opposite direction to the direction of the force received by the displacement piece. However,
The setting of the displacement amounts δ1 to δ5 shown in FIGS. 4 and 5 is merely an example, and an optimum value is appropriately set according to the curvature of the spiral corrugated wire to be manufactured.

FIG. 8 is a view for explaining the concept of manufacturing in the method of manufacturing a spiral corrugated wire. Also,
The formula used for the production of the spiral corrugated wire is described below. Some of these formulas are empirical.

[0024]

(Equation 1)

The symbols used in the above equations 1 to 7 are as follows. d = diameter of wire rod (mm) σy = yield point stress of wire rod (Kgf / mm ² ) σy
= ΣB × 0.7 σB = Strength of wire (Kgf / mm ² ) V = Feed speed of wire (m / min) δ = Displacement of displacement piece from center line (mm) h = Eccentricity of product (mm) ) Difference in height from one mountain to the next (see Fig. 6 (B)) P = product pitch (mm) Distance from one mountain to the next mountain (see Fig. 6 (A)) L = pitch of displacement piece ( mm) (see FIGS. 2 and 8) μ = Friction coefficient generated between the displacement piece and the wire (μ = 0.
If it exceeds 3, the wire will buckle due to the feed force. However, the value of μ slightly changes depending on the surface shape of the wire. )

Formulas 1 to 7 will be described. Equation 1 is an equation showing the section modulus (second moment of area) of the wire. Equation 2 is an equation showing the bending moment of the wire. Equation 3 is an equation showing the reaction force of the central displacement piece (for example, the third displacement piece). Equation 4 is an equation showing the sliding force of the displacement piece at the center. Here, μ is the allowable friction coefficient, μ
= 0.1-0.3. Equation 5
Is an empirical formula showing the relationship between the displacement piece pitch L and the processing pitch P. Here, α is an allowable range variable, and α = 1.0 to 2.0
Take a value in the range Equation 6 is a possible range variable of the number of revolutions required for the spiral wave machining, and takes the above range. In addition,
A more preferable range in this range is η = 1.0 to 1.2.
5 Equation 7 is the number of rotations N required for spiral wave machining.
Is an empirical formula expressed as a function of the wire feed speed V, η, and the product pitch P.

Referring to FIG. 8, a description will be given of a setting procedure which is preferably performed when manufacturing a spiral corrugated wire. (Setting 1) First, the diameter d of the wire and the tensile strength σB of the wire are given as parameters of the wire to be used. Then, as parameters of a product to be manufactured, a processing pitch P and an eccentric amount h of the spiral corrugated wire are given as specifications. For example, d = 9 mm, P = 100 mm, σB = 40 Kgf /
mm ² and h = 5 mm.

(Setting 2) Next, a wire feed speed V is assumed. It is assumed that V = 10 m / min. (Setting 3) Next, the pitch L of the displacement pieces is assumed. For example, if α = 1.25 in Equation 5, L = 1.2
It suffices to set 5 × 100 = 125 mm. (Setting 4) Next, a processing rotation speed N is assumed. Assuming that η = 1.0 in Equation 6, N1.0 = 10 × 100
0 × 1.0 ÷ 100 = 100 (rpm).

(Setting 5) The machine is set and operated under the above conditions (Setting 1) to (Setting 4). At this time, the turning centers of the first to fifth displacement pieces are aligned with the center of the rotation center axis O. (Setting 6) The second displacement piece, while referring to the result of the driving state,
The third displacement piece and the fourth displacement piece are adjusted so as to match the specifications of the product to be obtained. At this time, the upper limit of the displacement amount δ of each displacement piece with respect to the diameter d of the wire is as follows. Second displacement piece δ2 = d × ± 0.5 or less Third displacement piece δ3 = d × 3 or less (provided that the wire does not buckle) Fifth displacement piece δ2 = d × ± 0.5 or less Basic As a setting method, the processing pitch P is adjusted by the third displacement piece, and the eccentricity h is adjusted by the fourth displacement piece. However, the second
There is a mutual relationship between the displacement piece and the fourth displacement piece that changing one changes the other.

FIG. 9 mainly shows the meaning of the equation (7).
It is the figure shown in the graph. In this figure, the horizontal axis represents the feed speed V of the wire, and the vertical axis represents the processing speed N.
= 1.0 is shown. P of each straight line indicates a processing pitch P of the manufactured spiral corrugated wire, and it is understood that the processing rotation speed N needs to be reduced as the processing pitch P increases. Also, in Equation 6, if η = 1.0 and the processing pitch P is 100 mm, N1.0 = 1
0 × 1000 × 1.0 ÷ 100 = 100 (rpm), and if the processing rotation speed is set to 100 rpm, it is possible to produce a preferable spiral corrugated wire.

Next, the difference between the manufacturing method of the present embodiment and a linear cutting machine will be described. The linear cutting machine is a machine that straightens a habit (a large bend or a small bend) of a coil-shaped wire by repeatedly removing the habit at a fine pitch by a rotating correction piece. Therefore, for example, when focusing on 100 mm between arbitrary points of the manufactured linear wire, the correction piece takes a habit by rotating a narrow distance of about 14 to 10 mm 7 to 10 times between the points. That is, the rotation correcting section of the linear cutting machine rotates at a high speed and the pitch of the rotation trajectory is narrow. In general, the wire feed speed of the linear cutting machine is high. For example, V = 10 to 60 m / min, at most about 200 m / min, and a frequently used range is:
V = about 15 to 40 m / min.

On the other hand, in the method of manufacturing a spiral corrugated wire according to the present embodiment, the curl (large bend, small bend) of the coiled wire is roughly removed by a straightening roller at the entrance, and
This is a machine for processing a linearized wire into a spiral wave-shaped wire in a spiral wave-shaped wire forming section. Therefore, the completed spiral corrugated wire may have a small, slightly bent residue. Also, for example, when focusing on 100 mm between arbitrary points of the manufactured spiral wavy wire, the displacement piece rotates 1.0 to 1.5 times between the points and rotates a wide distance of about 100 mm to 66 mm to form a spiral wavy wire. Is formed. The spiral wavy wire forming section rotates at a low speed and has a wide rotation locus pitch. In general, the wire feed speed of a spiral wavy wire processing machine is low. For example, V = 2.5 to 50 m / min
It is. Of these, the most frequently used range is V = 5-1.
It is about 5 m / min.

FIG. 10 is a diagram showing an example of the operable range when a general mild steel wire is selected and the horizontal axis represents the wire feed speed V and the vertical axis represents the rotation speed N. In FIG. 10, a wide hatched area on the upper side shows a processing rotational speed range of the straight cutting machine, and a narrow hatched area on the lower side shows a processing rotational speed range of the spiral wavy wire of the present embodiment. In addition, the straight line 39 which divides the processing rotation speed range of the helical wavy wire is a dividing line of the processing limit. Preferably, as described in the seventh and eighth inventions, the wire feed speed V is 3 m / min. It is preferable to use it in the region where the rotation speed N is 50 rpm and the rotation speed N is 30 rpm to 1000 rpm. As described above, the conditions operated in the present embodiment are set in a range different from the operation range of the linear cutting machine.

Next, the overall operation of the spiral wavy wire manufacturing apparatus will be described with reference to FIG. First, an operation of attaching a wire to the spiral wavy wire manufacturing apparatus 1 will be described. As shown in FIG. 1, the wire 6 supplied from the coil stand 7 is sandwiched between pinch rollers 8.8, and the wire 6 is inserted from the upstream entrance of the piece fixing body 12 of the spiral wavy wire forming section 4, The wire 6 is taken out from the downstream side exit of the bridge fixed body 12, and the guide member 1 of the spiral corrugated wire cutting portion 5 is formed.
Insert 6 From this state, as shown in FIGS. 4 and 5, the second displacement piece K2, the third displacement piece K3, and the fourth displacement piece k4.
Is pushed in with the position adjusting bolts 31 (see FIG. 3). At this time, if the pushing amount is too large, the angle θ shown in FIG. 8 becomes large, and the resistance when the wire 6 is fed becomes large. This completes the work of attaching the wire 6.

In the production of the spiral wavy wire, the wire is fed to the spiral wavy wire forming section 4 by the pinch rollers 8.8 in the above state as shown in FIG.
The wire 6 is changed to a spiral wavy wire 14 and sent to the spiral wavy wire cutting section 5 by rotating the piece fixed body 12 at a predetermined rotation speed N. Until the feeding speed V and the number of revolutions of the frame fixed body 12 become stable, the processing pitch P of the spiral wire rod 14 to be produced is also unstable, but the feeding speed V and the number of revolutions N of the piece fixed body 12 are unstable. Is equal to the set value, the high-quality spiral corrugated wire 14 having a constant processing pitch P and eccentricity h (see FIGS. 6A and 6B) depends on the feed speed V of the wire 6. And can be produced continuously.

The spiral wavy wire thus produced is spirally twisted in the direction 37 in which the wire extends, as shown in FIG. 6A, and is perpendicular to the direction in which the wire extends in plan view. A spiral wavy wire is formed, which alternately undulates in the direction. This is because the eccentric amount h of the wire 6 changes spirally in the direction in which the wire extends as the displacement piece rotates as shown in FIG. 6B.

In an experiment conducted by the present inventor, when the number of rotations N of the fixed body was increased while the displacement amount δ of each displacement piece and the piece pitch L were set to predetermined values, the processing pitch P of the spiral corrugated wire rod was increased. It has been found that the machining pitch P increases as the rotation speed decreases. Therefore, the processing pitch P of the manufactured spiral corrugated wire is inversely proportional to the rotation speed N. FIG. 7 shows the case where the rotation speed N is 30 rpm to 150 rpm.
When the rotation speed N is sequentially increased to rpm, the rotation speed N is plotted on the horizontal axis, and the processing pitch P of the manufactured spiral wavy wire is plotted on the vertical axis. As shown in FIG.
It can be seen that the processing pitch P of the manufactured helical corrugated wire can be freely changed in a low rotation speed range from 150 rpm to 150 rpm. In addition, the spiral wavy wire manufactured in this experiment was able to form a spiral wavy wire with good reproducibility and good quality at each rotation speed.

According to the method of manufacturing the spiral corrugated wire of the present embodiment, the following excellent operational effects can be obtained. (1) The spiral wavy wire manufactured by the present manufacturing method is twisted spirally (three-dimensionally) in the direction in which the wire extends, and alternately waves in a direction perpendicular to the direction in which the wire extends in plan view. Since such a wire is used, the bending strength can be increased as compared with the corrugated wire shown in the conventional example. For example, when the spiral wavy wire is used as the reinforcing pile 47 for driving into a cliff, a ground, or the like as shown in FIG. 9, the reinforcing pile having an increased strength is extremely required if the spiral wavy wire according to the present embodiment is used. It can be provided at low cost. In addition, the diameter d of the steel material used for the reinforcing pile is usually 5 mm to 30 mm, and those having a diameter of 9 mm to 16 mm are often used.

(2) As shown in FIG. 7, even if the pitch L of the displacement pieces is constant and the feed speed V of the wire is constant, the rotation speed N of the piece fixed body is changed to process the spiral corrugated wire produced. The pitch P can be changed with good reproducibility,
A plurality of types of spiral corrugated wires having different processing pitches P can be easily formed.

[0040]

EXAMPLES Specific examples will be described below. (Example 1) As steel, wire diameter d = 13 mm, σB = 40
Kgf / mm ² , displacement piece pitch L = 1
65 mm, displacement amount of the second displacement piece δ = -1 mm (a minus sign indicates that this displacement is beyond the rotation center axis O and is opposite to the direction of displacement of the third displacement piece), displacement amount of the third displacement piece δ = 185 mm, displacement amount of the third displacement piece δ = −1.5 mm
When η = 1.09 is set, the wire feed speed V = 7.52 (m / min) and the processing rotation speed N = 82 rpm
m, the machining pitch P = 100 m
m, a spiral-shaped corrugated wire of good quality could be produced.

(Example 2) Wire diameter d = 9.0 m as steel
m, σB = 40 Kgf / mm ² , pitch L of each displacement piece = 110 mm, displacement amount δ of the second displacement piece = −1.5
mm, the displacement amount δ of the third displacement piece = 205 mm, the displacement amount δ of the third displacement piece = 2.5 mm, and η = 1.085, the wire feed speed V = 7.29 (m / mi)
n) When the operation was performed with the processing rotation speed N = 113 rpm, a spiral wavy wire of good quality with a processing pitch P of 70 mm was able to be produced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram for explaining a spiral wavy wire manufacturing apparatus to which a method of manufacturing a spiral wavy wire according to the present invention is applied.

FIG. 2 is a front view for explaining a detailed configuration of a spiral wavy wire forming section which is a characteristic part of the present embodiment.

FIG. 3 is a vertical sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a cross-sectional view of a displacement piece schematically illustrating a state in which a wire is pressed by the displacement piece.

FIG. 5 is a schematic view showing a relationship between a displacement piece in a piece fixing body and a wire flowing through an insertion hole.

FIGS. 6 (A) and 6 (B) are diagrams for explaining a spiral corrugated wire manufactured on a vertical axis.

FIG. 7 is a diagram showing a change in the processing pitch when the rotation speed is changed by setting the rotation speed on the horizontal axis and the processing pitch of the manufactured spiral wavy wire on the vertical axis.

FIG. 8 is a diagram for explaining the concept of manufacturing in the method of manufacturing a spiral corrugated wire.

FIG. 9 is a graph showing the meaning of Expressions 6 and 7 in a graph.

FIG. 10 shows how a general mild steel wire rod is selected, the horizontal axis represents the moving speed of the wire rod, and the vertical axis represents the number of rotations. It is the graph which showed whether the rotation speed was different.

FIG. 11 is a view for explaining a conventional method of manufacturing a wavy wire.

FIG. 12 is a diagram illustrating a method of using a reinforcing pile.

[Explanation of symbols]

12: piece fixed body, 32: insertion hole, 33: displacement piece (K1
Ｋk5), 34: pressing surface, O: rotation center axis O. L: pitch between displacement pieces, δ: displacement amount of displacement pieces, V: wire feed speed, N: number of revolutions of the piece fixed body, d: diameter of wire, P: working pitch of manufactured spiral wavy wire.

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[Procedure amendment]

[Submission date] September 5, 2000 (2009.5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Change

[Correction contents]

(Setting 5) The machine is set and operated under the above conditions (Setting 1) to (Setting 4). At this time, the turning centers of the first to fifth displacement pieces are aligned with the center of the rotation center axis O. (Setting 6) The second displacement piece, while referring to the result of the driving state,
The third displacement piece and the fourth displacement piece are adjusted so as to match the specifications of the product to be obtained. At this time, the upper limit of the displacement amount δ of each displacement piece with respect to the diameter d of the wire is as follows. Second displacement piece δ2 = d × ± 0.5 or less Third displacement piece δ3 = d × 3 or less (provided that the wire does not buckle) Fourth displacement piece δ 4 = d × ± 0.5 or less Basic As a typical setting method, the processing pitch P is adjusted by the third displacement piece, and the eccentricity h is adjusted by the fourth displacement piece. However, the second
There is a mutual relationship between the displacement piece and the fourth displacement piece that changing one changes the other.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

[0040]

EXAMPLES Specific examples will be described below. (Example 1) As steel, wire diameter d = 13 mm, σB = 40
Kgf / mm ² , displacement piece pitch L = 1
65 mm, displacement amount of the second displacement piece δ = -1 mm (a minus sign indicates that this displacement is beyond the rotation center axis O and is opposite to the direction of displacement of the third displacement piece), displacement amount of the third displacement piece δ = 18.5 mm, displacement amount of the fourth displacement piece δ = -1.5 m
m, and η = 1.09, the feed speed V of the wire rod is 7.52 (m / min), and the processing speed N is 82r.
pm, the machining pitch P = 100
helical corrugated wire having a good quality of 1 mm was produced.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

(Example 2) Wire diameter d = 9.0 m as steel
m, σB = 40 Kgf / mm ² , pitch L of each displacement piece = 110 mm, displacement amount δ of the second displacement piece = −1.5
mm, the displacement amount δ of the third displacement piece is 20.5 mm, the displacement amount δ of the fourth displacement piece is 2.5 mm, and when η is set to 1.085, the wire feed speed V = 7.29 (m / Mi
n) When the operation was performed with the processing rotation speed N = 113 rpm, a spiral wavy wire of good quality with a processing pitch P of 70 mm was able to be produced.

Claims (8)

[Claims] 1. A plurality of displacement pieces (33) having a pressing surface (34) for pressing a wire, and the plurality of displacement pieces (33) are arranged side by side in the moving direction of the wire, and the displacement pieces (33) are A piece fixed body (12) whose fixing position can be adjusted, and a piece fixed body (12) that has a rotation center axis parallel to the moving direction of the wire.
(O) a rotating device for rotating around, a pitch (L) between each displacement piece and each displacement piece from the rotation center axis (O) in advance based on the specification of the spiral wavy wire to be manufactured. After setting the displacement amount (δ) of (33), the wire rod is rotated at a predetermined rotation speed (N) while the wire is moved to the frame fixing body (12) at a predetermined feeding speed (V). Then, by applying a force to the peripheral surface of the wire at the pressing surface (34) of each displacement piece (33), a wavy curved and spiral wire is continuously manufactured from the coil-shaped wire. , A method of manufacturing a spiral corrugated wire. 2. The method for manufacturing a spiral corrugated wire according to claim 1, wherein the displacement amount of the most upstream displacement piece among the plurality of displacement pieces fixed to the piece fixing body. And the amount of displacement of the most downstream displacement piece, respectively,
A method for manufacturing a spiral corrugated wire, which is set to の of (d). 3. The method of manufacturing a spiral corrugated wire according to claim 1, wherein the plurality of displacement pieces (33) fixed to the piece fixed body (12).
A method of manufacturing a spiral corrugated wire, wherein a displacement amount (δ3) of a third displacement piece counted from an upstream side is set to a maximum. 4. The method of manufacturing a spiral corrugated wire according to claim 1, wherein each of the displacement pieces
(33) is constituted by a cylinder having a wire insertion hole (32), and a pressing surface (34) of the displacement piece (33) is constituted by a convexly curved inner surface of the cylinder, and a pressing surface is formed on the wire. (34) A method for manufacturing a spiral-shaped corrugated wire, in which the pressing area of the wire is reduced by contacting the wire protrudingly. 5. The method for manufacturing a spiral wavy wire according to claim 1, wherein a pitch of the displacement piece is a pitch of the manufactured spiral wavy wire relative to a processing pitch (P) of the manufactured spiral wavy wire. (L) and the ratio (L / P) is 1.0 to 2.0.
The method for manufacturing a spiral corrugated wire set in the range of 6. The method for manufacturing a spiral wavy wire according to any one of claims 1 to 5, wherein a processing pitch (P) (mm) of the spiral wavy wire to be manufactured is: Between the feed speed (V) (m / min) of the wire and the number of revolutions (N) (rpm), N = V × 1000 × η ÷ P where η = 0.75 to 2.0. A method for producing a spiral corrugated wire produced under conditions within a certain range. 7. The method for manufacturing a spiral corrugated wire according to claim 1, wherein a feed speed (V) of the wire is set in a range from 3 m / min to 50 m / min. A method for producing a spiral corrugated wire. 8. The method for producing a spiral corrugated wire according to any one of claims 1 to 7, wherein the number of revolutions (N) of the frame fixing body (12) is set in a range of 30 rpm to 1000 rpm. , A method of manufacturing a spiral corrugated wire.