JP2001340931A - Wire forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire forming device which can cope with a problem that wire buckles especially when crossing a longer side orthogonally to a coil axis, in case that a wire having a rectangular cross section and is wound by a simple change of tools without improving the existing wire forming device. SOLUTION: In the wire forming device provided with a feed roller, wire guide, winding tool, core tool, and cutting tool, in case the longer side of the rectangle winds the coil orthogonal to the coil forming axis from the cross sectional and rectangular wire and in case a parallel coil is wound, the wire forming device characterized in that the device can cope by replacing the feed roller 4A, 4B, wire guide 9 or 31, winding tool 21, 22 or 32, 33, core tool 23 or 34, and cutting tool 24 or 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire forming apparatus for winding a wire, and more particularly, to forming a coil from a spring material having a rectangular cross section, the length of the rectangular cross section with respect to the direction of the coil forming axis. The present invention relates to a wire forming apparatus that performs winding in which side directions are parallel or winding in which long sides are orthogonal.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 10-156469 discloses a wire feeder in a wire forming apparatus such as a coil spring forming apparatus which feeds a wire from a wire guide by at least one pair of feed rollers. 2. Description of the Related Art A feeding device is conventionally known (hereinafter, referred to as conventional technology A). Further, as a device for feeding a deformed material from a material guide, a feeding device disclosed in Japanese Patent Publication No. 52-40633 is conventionally known (hereinafter referred to as conventional technology B).

Further, as a wire cutting device in a wire forming device such as a coil spring forming device, a semi-circular core metal with which the inner periphery of a wound coil spring abuts, as in the prior art A, is used. A method of cutting a coil spring end by a shearing action of a cutting blade formed at an upper end of a cutting blade surface and a cutting blade formed at a tip of a cutting tool which can be advanced and retracted is shown.

[0004]

SUMMARY OF THE INVENTION A pair of feed rollers is formed by sandwiching a rectangular material having a cross-sectional shape having a ratio of a short side to a long side several times at least two opposite sides vertically by at least one pair of feed rollers. When the rectangular material is forcibly transferred by the frictional force between the feed roller and the rectangular material according to the rotation of the feed roller and is fed to the rectangular material processing area through the hole of the wire guide, in the case of the prior art A, the pair of upper and lower feed rollers Each axis,
Since the axis of the coil wound by the winding tool is parallel, when winding a rectangular coil in which the direction of the forming axis of the coil and the direction of the long side of the rectangular cross section of the wire are parallel, 1
The pair of feed rollers may feed the rectangular material while holding the long side from above and below, so that the rectangular material can be sent without buckling. However, when winding a coil of a rectangular material in which the coil axis direction and the long side direction of the rectangular cross section of the wire are orthogonal, the feeding roller has to press the short side from above and below to send the rectangular material. There is a problem that the long side buckles due to the pinching force of the pair of delivery rollers, and the rectangular material is crushed in the delivery direction and buckled at this portion when the rectangular material is forcibly fed according to the rotation of the pair of delivery rollers. there were.

In the prior art B, as shown in FIG. 11, the axes of the pair of feed rollers 101, 101 and the coil axes wound by the winding tools 103A, 103B are perpendicular to each other. I have. In other words, when winding a coil having a rectangular cross section of a wire and winding a rectangular coil in which the direction of the forming axis of the coil is orthogonal to the long side direction of the rectangular cross section of the wire, a pair of feed-outs is required. Since the rollers 101 and 101 send the rectangular material while holding the opposing long sides from above and below, the rectangular material can be sent without buckling deformation. However, when winding a coil of a rectangular material in which the direction of the forming axis of the coil and the direction of the long side of the rectangular cross section of the wire are parallel, the delivery rollers 101, 101
Must send the rectangular material with the short side sandwiched from above and below, so the rectangular material may buckle due to the pressure of the feed roller,
There has been a problem that the feeding roller buckles at this portion when forcibly feeding the rectangular material.

[0006] As a wire rod cutting device in a wire rod forming device, prior art A is shown in FIG.
To explain by inserting a cut portion into (b), the coil bent in the rectangular material processing region is located at the cutting edge of the metal core tool 105, and the cutting tool 104 is
When shearing in the direction of the long side of the rectangle in cooperation with the cutting blade, the rectangular member is cut straight from the long side of the rectangular member, so that the rectangular member buckles and cannot be cut cleanly.

[0007] The present invention has been made to solve the above-mentioned problems of the prior art.
It is a simple and easy way to replace only the tool member for each wire to be used, and it can be adapted to both the case where the coil axis and the long side of the rectangular material are orthogonal and parallel in the coil forming of the rectangular material. An object of the present invention is to provide a wire forming apparatus that can be implemented without special modification for a machine such as A.

[0008]

According to a first aspect of the present invention, there is provided a wire guide for inserting a wire, at least one pair of feed rollers for feeding the wire up and down, and abutting the wire fed from the wire guide. At least one winding tool wound around the coil, a core metal tool contacting the inside of the wire being wound by the winding tool, and a coil formed in cooperation with the core metal tool. A wire forming apparatus including a cutting tool for cutting a wire rod having a rectangular cross section, the wire guide, upper and lower feed rollers, a winding tool, a cored metal tool, and a cutting tool are formed by using the wire rod. By exchanging according to the cross-sectional shape of the above, it is possible to cope with coil forming in which the long side of the rectangular cross section is orthogonal to the coil forming axis and coil forming in which the long side of the rectangular cross section is parallel to the coil axis.

According to the first aspect of the present invention, in the coil forming of a wire having a rectangular cross section, if the long side of the rectangular cross section of the wire is orthogonal or parallel to the coil axis, it is easily performed by replacing only the tool member. It can be easily handled without modification of a conventional coil spring forming machine on the market.

According to a second aspect of the present invention, in the coil forming in which the long side of the rectangular cross section of the wire is orthogonal to the coil axis, the wire guide has a short side between the upper and lower surfaces of the rectangular hole through which the wire is inserted. Provide circular notches to avoid interference,
The core metal tool receives a chord upper ridge line of a semi-cylindrical column, and forms at least a cutting line with an intersecting line formed by a cross section perpendicular to a semi-cylindrical axis of a semi-cylindrical base and a plane including a chord portion of the semi-cylindrical column. The cutting edge of the tool is inclined to the cutting edge of the metal core tool.

According to the second aspect of the present invention, the four sides of the wire cross section, including the upper and lower feed rollers, are guided and guarded by the continuous wire guide, so that even a thin rectangular material is crushed up and down by the holding pressure. Deformation does not occur, and it is possible to prevent buckling of the wire rod forcedly fed by the feed roller in the feed direction. In addition, the upper edge line of the chord portion of the semi-cylindrical column of the metal core tool is received, and the vertical line of intersection between the cross-section perpendicular to the semi-cylindrical axis of the semi-cylindrical column and the chord surface is formed on the cutting blade parallel to the long side of the rectangular material. The cutting tool has an oblique cutting edge, so that the long side of the wire rod is pressed against the cutting edge by the shear force during cutting, and is securely stopped by the chord ridge of the semi-cylindrical column. In this state, the rectangular material is sheared from top to bottom in the cut-off state, so that buckling of the wire at the time of cutting is prevented.

According to a third aspect of the present invention, in the coil forming in which the long side of the rectangular cross section of the wire is parallel to the coil axis, the wire guide has the upper and lower surfaces of the rectangular hole through which the wire is inserted as the long side, and The core metal tool is divided at or near the holding portion, the core metal tool has a cutting line at the intersection of the semi-cylindrical chord surface and the semi-cylindrical surface, and the cutting tool has a cutting edge at the lower edge of the prism. According to the third aspect of the present invention, the upper and lower surfaces of the rectangular long side are pinched by the feed roller, so that the buckling which is crushed up and down by the pinching pressure of the roller is prevented, and the wire rod has four surfaces in the middle of the feed. Since it is guided and guarded, even a thin rectangular material is prevented from being buckled by being forcibly fed out. Since the cutting of the wire rod is performed by the cooperation of the cutting edge of the horizontal ridgeline of the semicircular cylinder of the metal core tool and the horizontal cutting edge of the cutting tool, buckling does not occur at the time of cutting.

According to a fourth aspect of the present invention, the wire guide is divided at or near the holding portion of the upper and lower feed rollers. According to the invention of claim 4,
The wire guide is cut so that buckling does not occur with respect to the holding pressure and forced feeding of the wire, so that a wire guide having a small rectangular hole is manufactured, or a groove for receiving the rectangular material is cut out to form a lid. By doing so, a rectangular hole can be formed, and the production of the wire guide becomes easy.

According to a fifth aspect of the present invention, the outer peripheral surface of the upper and lower feed rollers guides the wire by a guide groove having a rectangular material width. According to the fifth aspect of the present invention, when a circumferential groove having a rectangular width, that is, the upper and lower long sides are sandwiched on the outer periphery of the upper and lower feed rollers, a shallow groove having a long width and the upper and lower short sides are sandwiched. Is to cut a shallow groove with a short side width.
Since a part of the rectangular material is engaged with the groove and the movement to the left and right is regulated, the wire can be sent out stably and reliably.

According to a sixth aspect of the present invention, in the winding tool, a groove having a width of a rectangular material is formed on an outer circumference of a roller pivotally supported by a tool handle. According to the sixth aspect of the invention, since the roller is formed with the groove for winding while guiding the rectangular material on the winding forming surface of the winding tool, the roller rotates at the time of winding to form the winding forming surface. Less wear and longer tool life. When the long side of the rectangular cross section of the wire is orthogonal to the coil axis, it is a deep groove with a short side width, and when the long side is parallel to the coil axis, it is a shallow groove with a long side width. In addition, since the wire is guided into the groove, the wire axis of the winding portion is constant without meandering, and the pitch error when applying the pitch is stabilized.

According to a seventh aspect of the present invention, the winding tool guides the wire by forming a groove for abutting a wire having a rectangular cross section at the tip of the tool. According to the invention of claim 7,
Since a deep groove with a short side width or a long side width shallow groove of a rectangular material is formed at the tool tip, the wire axis of the winding part is constant without meandering, and the pitch error when giving the pitch is reduced. Stabilize.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing a delivery mechanism, a winding tool, a metal core tool, and a cutting tool according to the present invention, and FIG. 2 is a sectional view taken along line AA of the center position of the delivery roller in FIG. A wire rod forming apparatus will be described based on an enlarged view of a wire guide, a winding tool, and a metal core tool, and FIG.

The basic configuration of a coil spring forming apparatus for winding a wire according to the present invention is the same as that of a known apparatus, and therefore will not be particularly described. A feature of the present invention is that the shape of a wire rod guide, a feed roller, a winding tool, a cutting tool for cutting the wound coil spring, and a cored bar tool when a coil spring is wound using a rectangular material as a forming material. is there. This will be described in detail below. First, in coil forming in which the long side of the rectangular cross section of the wire is orthogonal to the winding axis (coil axis), the mechanism of the wire feed-out portion and the coil forming portion will be described.

A delivery roller disposed after a straightener (not shown) for correcting distortion of a rectangular wire having a rectangular cross section wound on a hoop includes a bracket 1 attached to the front surface of the board of the machine.
In the position above the wire feed line, the support shaft 3 is rotatable by bearings 2A, 2A whose rear end is held directly and whose front end is held indirectly.
A bearings 2B, 2B, whose front and rear ends are directly held on the bracket 1 in parallel at symmetrical positions below the line.
The support shaft 3B is rotatably mounted on the support shaft 3B. This spindle 3
Feed rollers 4A, 4B mounted on the front ends of A, 3B and having a flat outer periphery are respectively prevented from rotating by pins 6A, 6B axially implanted on the flanges 3Aa, 3Ba of the support shafts 3A, 3B. .

Then, the feed rollers 4A, 4B are connected to the tightening screws 8A, 8B via the holding plates 7A, 7B.
And are concentrically seated on the flanges 3Aa and 3Ba. A rectangular material W is provided between the feed rollers 4A and 4B.
The diameter of the delivery roller is made such that a gap is formed at a distance equal to the long side length of the delivery roller. A wire guide 9 having a through-hole through which a wire having a rectangular cross section passes.
Is interposed. The wire guide 9 can form a through hole by cutting a groove in the body and fixing the lid integrally. The hole 9a having a rectangular cross section of the wire guide 9 has the same shape and size as the rectangular cross section of the wire, and has a size such that the wire is guided and smoothly passes therethrough. It is a hole. The wire guide 9 is provided between the feed rollers 4A and 4A.
At the inlet side and the outlet side of B, the bracket B is fastened to the bracket 1 via the holding lid 12 and the mounting plate 11. The wire rod guide 9 has its upper and lower surfaces cut out by an arc 9b slightly larger than the diameter of the feed rollers 4A and 4B so as not to interfere with the upper and lower feed rollers 4A and 4B. It is made slightly smaller so that the upper and lower short sides are exposed. The wire guide 9 may be continuous or divided at the portions of the feed rollers 4A and 4B.

Further, a bracket 1 at the rear end of the support shafts 3A, 3B.
A small gear 13A, 13B having the same number of teeth meshing with each other is keyed on the side directly bearing on the shaft. The small gear 13A is driven and controlled by a control device via an intermediate gear (not shown), and the delivery roller 4A , 4B are rotated in opposite directions to forcibly send out the wire W. The rear bearing 2A of the support shaft 3A has a spherical outer surface 2Aa and is directly held on the bracket 1 via a housing 15 having a spherical seat surface 15a for receiving the spherical surface 2Aa. The bearing 2A on the front side of the support shaft 3A is held by a bearing housing 14 that is movable in a vertically long through hole cut out of the bracket 1. A hydraulic cylinder device 17 is established on a cylinder receiving plate 16 which is detachably fixed to a horizontal step 1a on the upper portion of the bracket 1 by bolts. Is removably engaged with a T-groove 19a which is notched through the upper part of the T-shape.

Therefore, by supplying a predetermined pressure oil to the upper chamber of the hydraulic cylinder 17, the piston rod 18,
When the support shaft 3A is subjected to the downward pressure via the bearing housing 14, the support shaft 3A can be inclined around the spherical surface of the bearing 2A. A lower pressure is applied to 4A. Then, the rectangular wire rod is sandwiched between the feed roller 4B having a fixed position and a predetermined pressure from above and below. The long side of the wire is the wire guide 9
Is guided by the inner surface of the hole 9a, so that it is prevented from being crushed and buckled by the pinching force.

The above-mentioned upper and lower feed rollers 4A, 4
B, hydraulic cylinder device 17 of pressurizing mechanism, wire rod guide 9
In this example, two sets of identical mechanisms are provided in parallel, and the other set is indicated by attaching the same reference numerals to the same parts. Therefore, the wire guide 9 is a long connection extending over two sets of feed rollers. The feed side protrudes from the bracket 1 and extends to the front surface of a later-described winding tool, and is fastened replaceably.

The winding tool will be described with reference to FIG. On the front surface of the wire guide 9, a first winding tool 21 which is controlled and advanced to a position where a desired coil diameter is wound by a reciprocating drive device (not shown) obliquely downward and substantially toward the center of the wound coil. Is provided. Further, a second winding tool 22 of the same shape is provided on the upper portion of the same winding tool 22 which is controlled and advanced to a position where a desired coil diameter is wound by an advance / retreat driving device (not shown) toward a substantially center of the coil wound obliquely from above. Have been. As shown in FIG. 4b, the winding forming surfaces of the winding tools 21 and 22 each have a deep groove 21 having a width through which the short side (thickness) of the rectangular cross section passes and having a depth substantially equal to the length of the long side of the rectangular cross section.
a and 22a are cut from the front end face.

The cutting tool and the metal core tool will be described with reference to FIGS. The cored metal tool 23 is arranged so that the chord side 23a of the semicircle is located at the center of the front end face of the rectangular parallelepiped long in the vertical direction in the vertical direction at a position substantially flush with the front end face of the wire guide 9. The semi-cylindrical column 23b is provided so as to be able to be vertically adjusted in accordance with the coil diameter to be wound. The upper end ridge line 23c on the chord side 23a surface of the semi-cylindrical column 23b is used as a receiver for the wire rod, and a vertical line of intersection including a cross section 23d perpendicular to the semi-cylindrical axis and a plane including the chord portion is formed at the base of the rectangular parallelepiped semi-cylindrical column 23b. Use a cutting edge.

The cutting tool 24 is a prism having a wedge-shaped slope 24a at the lower end on the opposite side to the coil forming direction, and the ridge line on the side of the side metal core tool is a cutting blade 24b. The cutting tool 24 is provided such that the cutting blade 24b is positioned on the chord side 23a of the metal core tool 23 and can be moved up and down by a driving device (not shown).

Next, the forming process of the coil spring with the wire forming apparatus having the above configuration will be described. The rectangular wire with a rectangular cross section wound around the hoop has a rectangular hole 9a in the wire guide 9 after the distortion is corrected.
The upper and lower surfaces of the short side exposed by the upper and lower notches of the wire guide 9 are fixed to the upper feed roller 4A and the fixed lower feed roller pressed downward by a hydraulic cylinder device 17 operated by a predetermined pressure. 4B at a predetermined pressure. Since the wire W is guided and guarded by the wire guide 9 so as to surround the upper and lower sides and both sides without play, the wire W is not crushed due to pinching and buckling does not occur. The wire W sent by the first-stage delivery rollers 4A and 4B is forcibly delivered by the second-stage delivery rollers 4A and 4B at the same speed or slightly faster, and the wire W slides by double delivery. The feed is surely sent out without raising, and finally a feed amount required for a predetermined coil spring is sent out.

The wire W sent out from the front end of the wire guide 9 abuts against the winding groove 21a of the first winding tool 21 which is advanced to the front surface of the guide and is bent slightly upward toward the front [FIG. 5 and 6]. The curved wire W further abuts against the winding groove 22a of the second winding tool 22 to form an arc whose long side of the rectangular cross section is orthogonal to the coil axis, and the metal core tool 23
A circle circumscribing the receiver of the ridge line 23c on the upper surface of the chordal surface of the semicircular column is formed. The centers of the winding grooves 21a and 22a of the first winding tool 21 and the second winding tool 22 are sequentially shifted slightly from the hole center of the wire guide 9 in the coil forming direction, or the winding grooves 21a are sequentially twisted. A predetermined pitch is formed in the wound coil [FIGS. 4, 5, and 6b].

When the number of turns of the coil reaches a predetermined number and a coil of a predetermined length is formed, the feed rollers 4A, 4B
Is stopped, and the feeding of the wire W is interrupted. The cutting tool 24 is lowered and the wire W is cut by the cutting blade 24b on the slope 24a.
Is pressed downward and received by the ridge line 23c of the semi-cylindrical column 23a, and the longer side of the rectangle is
Is pressed against the vertical cutting blade 23d. As the cutting tool 24 continues to descend, the wire W having a rectangular cross section is sheared obliquely from above by the cutting blade 24b of the cutting tool and the cutting blade 23d of the metal core tool 23, and the cutting is finally completed by the cutting blade 23d. During this cutting operation, the wire having a rectangular cross section is received by the ridge line 23c and is securely held by being pressed by the cutting blade 23d, so that it is not crushed and buckled, and is cut off neatly by cutting in the pulling-out mode. .

Another embodiment of the feeding rollers 4A and 4B formed by coiling which sandwiches the upper and lower surfaces of the rectangular short side will be described with reference to FIG. On the outer periphery of each of the feed rollers 4A and 4B, shallow concave grooves 4Aa and 4Ba each having a short side width with which a rectangular cross-section short side of the wire is an upper and lower surface and a part of a lower end thereof are formed as circumferential grooves. It was done. Along with this, the notched arc of the wire rod feed guide 9 becomes a little deeper to avoid interference with the rollers. In this type, since the frictional force between the wire and the roller increases, the pressing force applied to the upper feed roller can be reduced. Further, since both sides of the wire are engaged with the groove, stable feeding can be achieved.

Another embodiment of the winding tools 21 and 22 will be described with reference to FIG. This winding tool is a winding roller 2
7 and 29 and two forked tool handles 26 and 28 pivotally supported by pins 30 respectively. On the outer periphery of the winding rollers 27 and 29, circumferential grooves 27a and 29a of deep grooves having a short side width of a rectangular cross section of the wire are formed. In this case, the contact portion of the wire is shifted by the rotation of the roller, so that tool wear is reduced. The winding roller 27 has a groove width,
The depth can also be applied to the case of wire forming described below.

Next, a case of forming a coil spring in which the long side of the rectangular cross section of the wire W is parallel to the coil axis will be described with reference to FIGS. Since the basic configuration is the same, only the parts that are changed will be described.

The wire guide 9 with the long side of the rectangular hole mounted vertically is replaced, and the rectangular hole 31a is mounted horizontally so that the long side of the rectangular hole 31a is parallel to the outer peripheral surfaces of the feed rollers 4A and 4B. When the wire guide is cut out from above and below so as not to interfere with the upper and lower feed rollers 4A and 4B in a sandwiched state, the wire guide 31 is of a divided type. The projecting end of the wire guide 31 on the winding tool side is provided with a notch 31b for preventing interference with the wound coil. The divided wire rod guides 31 are individually fixed at the entrance side and the exit side of the delivery roller. Further, the feed rollers 4A and 4B having a flat outer periphery are replaced with those in which the diameters of the feed rollers are respectively increased by the difference between the long side and the short side since the long sides of the rectangular cross section are the upper and lower surfaces. As a result, a predetermined pinching force of the wire is obtained in the same manner as described above.

The first and second winding tools 32, 33 are shown in FIG.
As described above, the winding forming surface is changed from a deep groove to a shallow groove 32a, 33a having a wide long side and a substantially short side. The cutting tool 36 and the core tool 34 are replaced as shown in FIG. That is, the metal core tool 34 is a semicircular cylinder, and the cutting edge 34a of the upper edge line on the chord side.
Is attached so as to substantially coincide with the front end face of the wire guide 31. The cutting tool 36 is a square cylinder having no inclined surface, and replaces the cutting edge 36a of the ridge line at the lower end face so as to be located on the cutting edge 34a of the metal core tool 34.
It has the same shape as the cutting tool. By replacing only these parts, the present invention enables coil forming of a coil spring whose long side of the rectangle is parallel to the coil axis.

That is, the upper and lower surfaces of the wire rod W having a rectangular cross section inserted into the insertion hole 31a of the wire rod guide 31 are rotated and pressed by the hydraulic cylinder 17 with the upper feed roller 4A and the feed roller 4B at the fixed position. The wire guide 31 is sandwiched between the two long sides of the rectangular cross section and sent out from the front end of the wire guide 31. The wire W abuts against the winding groove 32a of the first winding tool 32 advanced to the winding position, is bent slightly forward, and is formed into an arc by the winding groove 33a of the second winding tool 33. The coil is continuously formed on the near side in contact with the cylindrical cored tool 34. When the coil length reaches a predetermined number of turns wound a predetermined number of times, the feeding of the wire rod is stopped, the cutting tool 36 descends, and is sheared by the cutting blade 34a and the cutting blade 36a of the metal core tool 34 to separate the coil from the wire rod.

[0036]

As described above, the present invention has the following advantages. The invention according to claim 1 is characterized in that a long side is orthogonal to a coil forming axis when forming a coil of a rectangular material,
In the case of parallelism, it is possible to easily cope with both by simply changing the wire rod guide, the feed roller, the winding tool, the core metal tool, and the cutting tool. It is easy to deal with. Since the replacement tool member also belongs to consumables, it can be implemented without increasing the cost.

According to the second aspect of the present invention, when a wire having a rectangular cross section is made vertical and the upper and lower surfaces are fed as short sides, the four sides around the wire are guided and completely guarded, so that the pressing roller is pressed. The upper and lower portions of the rectangular material are crushed to prevent buckling of the wire. In addition, when the wire is forcibly fed by the rotation of the feed roller, buckling of the rectangular material in the feeding direction is prevented. When cutting the coil, the wire is received by the upper ridge of the chord side of the half cylinder of the metal core tool, and the cutting tool uses a diagonal cutting edge to apply the wire to the vertical cutting edge perpendicular to the base of the half cylinder by shear force. Since the wire is sheared downward from above while being pressed against it, the wire is prevented from being crushed by cutting and can be cut cleanly without causing buckling.

According to the third aspect of the present invention, the wire is completely guided on four sides by the wire guide during the feeding, and the long side surface is pressed between the feed rollers from above and below, so that the buckling of the wire is prevented.

According to the fourth aspect of the invention, since the wire guide is divided, the wire guide having a rectangular hole can be easily formed by dividing the lid and the body to form a groove. It is easy to mount.

According to the fifth aspect of the present invention, since the pressing surface of the delivery roller is formed by a groove, the upper and lower portions of the rectangular material are engaged left and right, so that the wire can be more reliably and reliably fed.

According to a sixth aspect of the present invention, the winding groove of the winding tool is cut into the roller to reduce the friction between the wire and the winding groove, so that the tool is less consumed and the tool and the wire generate heat. Can be suppressed.

According to the seventh aspect of the present invention, since the wire is wound in the groove at the tip of the tool, the coil can be stably wound.

[Brief description of the drawings]

FIG. 1 is a related front view of a wire feed roller, a wire guide, a winding tool, and a metal core tool of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of a center position of a feed roller in FIG.

3 is an enlarged view of a feed roller and a wire rod guide, wherein a is a front view, and b is a side view with a partial cross section. FIG.

4 is an enlarged layout view of a wire guide, a winding tool, and a metal core tool, wherein a is a front view, and b is a cross-sectional view taken along line BB of a.

FIG. 5 is a diagram showing a state in which a long side of a wire having a rectangular cross section is wound in a direction orthogonal to a coil axis, where a is a plan view,
b is a front view.

6 is an enlarged view of the molding state of FIG. 5, in which a is a front view of a half-turn at the beginning of winding, b is a cross-sectional view taken along the line CC of a, and FIG. FIG. 4 is a cross-sectional view of a state where the wire is cut by the method.

FIGS. 7A and 7B are views showing another embodiment of the delivery roller, where a is a front view and b is a view showing a part of the roller in cross section.

FIG. 8 is another embodiment of the winding tool, wherein a is a front view and b is a
FIG. 4 is a sectional view taken along line DD of FIG.

FIG. 9 is a diagram showing a state in which a long side of a wire having a rectangular cross section is wound in a direction parallel to a coil axis, where a is a plan view,
b is a front view.

10 is an enlarged progress view of the molding state of FIG. 9, in which a is a front view of a half-turn at the beginning of winding, b is a cross-sectional view taken along the line EE of a, and c is a cutting tool in b. It is sectional drawing of the state which cut | disconnects a wire.

FIG. 11 is a diagram showing a coil forming state of the conventional technique B,
Is a plan view and b is a front view.

[Explanation of symbols]

 4A, 4B Feeding roller 9, 31 Wire rod guide 9a, 31a Rectangular hole 17 Hydraulic cylinder device 21, 22, 32, 33 Winding tool 23, 34 Core metal tool 24, 36 Cutting tool 23d, 24b, 34a, 36a Cutting blade

Claims (7)

[Claims] 1. A wire guide for inserting a wire, at least one pair of delivery rollers for sandwiching and sending the wire up and down, and at least one coil for abutting the wire delivered from the wire guide and winding it around a coil. A winding tool, a core metal tool that comes into contact with the inside of the wire being wound by the winding tool, and a cutting tool that cuts a wire formed into a coil in cooperation with the metal core tool. In the wire rod forming device
When a wire having a rectangular cross section is formed into a coil, the long side of the rectangular cross section is changed by replacing the wire guide, the upper and lower feed rollers, the winding tool, the metal core tool, and the cutting tool according to the cross section of the wire. A wire forming apparatus characterized in that it can cope with coil forming perpendicular to the coil forming axis and coil forming with a long side of a rectangular cross section parallel to the coil axis. 2. A coil forming method in which a long side of a rectangular cross section of a wire is orthogonal to a coil axis, wherein the wire guide is formed by an arc-shaped notch having upper and lower surfaces of a rectangular hole through which the wire is inserted as short sides to prevent interference with upper and lower feed rollers. The core metal tool receives a chord upper ridge line of a semi-cylindrical column, and forms at least a cutting line with an intersection of a cross section perpendicular to the semi-cylindrical axis of the semi-cylindrical base and a plane including the semi-cylindrical chord portion. 2. The wire rod forming apparatus according to claim 1, wherein the cutting edge of the cutting tool is inclined with respect to the cutting edge of the metal core tool. 3. In coil forming in which a long side of a rectangular cross section of a wire is parallel to a coil axis, the wire guide has upper and lower surfaces of a rectangular hole through which the wire is inserted as long sides, and is provided at or near a holding portion of the upper and lower delivery rollers. 2. The wire rod forming apparatus according to claim 1, wherein the core metal tool is cut, and an intersection line between the semi-cylindrical chord surface and the semi-cylindrical surface is used as a cutting edge, and the cutting tool is a cutting edge at a lower end edge of the prism. 4. The wire rod forming apparatus according to claim 2, wherein the wire rod guide is divided at or near a holding portion of the upper and lower feed rollers. 5. The wire rod forming apparatus according to claim 2, wherein the upper and lower feed roller outer peripheral surfaces guide the wire rod by a guide groove having a rectangular material width. 6. The wire rod forming apparatus according to claim 2, wherein the winding tool is formed by forming a groove having a width of a rectangular material on an outer circumference of a roller pivotally supported by a tool handle. 7. The wire rod forming apparatus according to claim 2, wherein the winding tool guides the wire rod by forming a groove for abutting a wire rod having a rectangular cross section at the tool tip.