JP3641559B2 - Wire rod forming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a forming method for bending a wire, and more specifically, a wire bending that is positioned in an arbitrary direction within a plane perpendicular to the quill axis with respect to the wire using a single wire bending tool device. The present invention relates to a forming method in which a tool is advanced and engaged with a wire and then rotated to bend and shape it into a twisted state.
[0002]
[Prior art]
Conventionally, bending with a wire bending tool in forming a coil spring is known, for example, from Japanese Patent No. 2690704. This is a bending tool device in which the sliding direction of the tool is fixed with respect to the quill for feeding the wire, and the bending process is performed, so that bending can only be performed in the specified direction with respect to the wire. There wasn't. For example, as shown in FIG. 23, the hook twist angle of 45 ° is determined by the slide mounting angle position of the bending tool device.
In addition, when making a product with a lot of bending work, it is necessary to provide a plurality of wire bending tool devices in which positions with respect to the quill are determined in advance based on the product to be produced, and to deal with them in cooperation.
[0003]
[Problems to be solved by the invention]
In the case of a product having a different bending direction of the hook, the one of Patent No. 2690704 has to be replaced and rearranged according to the bending angle for each product. It was troublesome to remove and install, and it was necessary to check the sliding direction accurately.
In addition, when a plurality of bending tool devices are provided, the structure of the machine becomes complicated and the machine price and product cost increase.
Further, when the number of apparatuses increases, interference occurs due to the positional relationship with other forming tools, making it difficult to attach the bending tool apparatus or the forming tool, and the forming must be performed in a separate process. Therefore, there is a problem that the loss time increases, the time until the product becomes long, and the product cost increases.
The present invention has been made in view of such problems of the prior art, and the object of the present invention is to arrange an angle with respect to the quill in a plane perpendicular to the quill axis without adding a bending tool device. By adopting a single bending tool device that can be changed, it is an object of the present invention to provide a processing method and device that can cope with a wide range of different bending angles of various products.
[0004]
[Means for Solving the Problems]
In order to achieve the above-described object, the wire rod forming method of the present invention is a wire rod forming method in which a tool is engaged or abutted against a wire rod fed out from a quill and bending is performed on the wire rod. A pair of engaging members that can pass through the wire to be fed are provided on the front end surface, and can be rotated and positioned around the axis of the quill on the front surface of the quill. Before or after the bending process in which a positionable bending tool is advanced in the orthogonal axis direction and the engaging member is engaged with the fed wire and rotated around this axis, the bending tool is centered on the quill axis. As a result, a twist is added by including a step of determining the bending direction or the bending direction of the wire.
[0005]
Also, a wire rod forming method in which a tool is engaged or abutted with a wire rod fed out from a quill to bend the wire rod, and a pair of engaging members at intervals through which the wire rod fed from the quill can pass A bending tool that can be rotated and positioned about the axis of the quill on the front surface of the quill, can be rotated about an axis orthogonal to the quill axis, and can be moved back and forth in the axial direction, in an axial direction orthogonal to the quill axis. A step of engaging the engaging member with the wire rod that has been advanced and fed out from the quill for a predetermined length and rotating the wire rod by a shaft orthogonal to the quill to bend the wire rod by a predetermined angle; And then the bending tool is rotated and positioned around a predetermined angle quill axis, and the bending tool is advanced again and sent out. In which twist is applied by including a step of the bending tool from an engagement member engaged with the timber is rotated in an axis orthogonal to the quill give bending the wire successively.
[0006]
Also, a wire rod forming method for engaging or abutting a tool with a wire rod fed from a quill and bending the wire rod, etc., and a shaft formed with an engagement portion engaging at least one side surface of the wire rod at the tip An outer cylinder that is rotatable about this axis and that has a protrusion at the tip that engages with the other side surface of the wire can be rotated and positioned around the axis of the quill on the front surface of the quill and is perpendicular to the quill axis The wire bending means that can be advanced and retracted is rotated and positioned around a predetermined angle quill axis, and the engaging portion is inserted into the wire that has been sent out by advancing the shaft and the outer cylinder in a direction perpendicular to the quill axis. A twist is applied by including a step of bending the wire rod by the protrusion by engaging and rotating the outer cylinder.
Therefore, the wire can be bent and twisted over a wide range at the same time.
[0007]
Also, a wire rod forming method for engaging or abutting a tool with a wire rod fed from a quill and bending the wire rod, etc., and a shaft formed with an engagement portion engaging at least one side surface of the wire rod at the tip An outer cylinder that has a protrusion at its tip that is rotatable about this axis and that engages with the other side surface of the wire can be rotated and positioned about the axis of the quill on the front surface of the quill and is orthogonal to the quill axis. The wire bending means that can be moved back and forth in the direction is advanced in the orthogonal direction so that the engaging portion is engaged with the wire fed from the quill for a predetermined length, and the outer cylinder is rotated so that the wire is predetermined by the protrusion. Angle bending process,
Next, the step of separating the engaging portion and the protrusion from the wire and feeding the wire further by a predetermined amount;
Next, the wire bending means is rotated and positioned around the quill axis at a predetermined angle, the engaging portion and the protrusion are advanced, the engaging portion is re-engaged with the fed wire, and the outer cylinder is rotated. A twist is added by sequentially including a step of bending the wire with the protrusions.
The wire bending means can be arbitrarily determined around the axis of the quill in accordance with the twist angle of the spring hook, and there is no need to change the position each time the spring twist angle is different.
[0008]
The engaging portion uses a pair of pins capable of holding the wire.
Moreover, the said engaging part uses one pin which contact | connects one side of a wire.
Further, the engaging portion uses a wire holding groove capable of holding the wire.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 of the front explanatory view shown in partial cross section, FIG. 2 of the enlarged view showing a part of the wire bending tool device in cross section, FIG. 3 showing the AA view of FIG. 1, BB in FIG. The description will be made with reference to FIG.
[0010]
A quill 3 of a wire guide tube penetrating through the central portion of the substrate 2 erected on the base 1 is provided. Then, a forming tool which is radially arranged on the front surface of the substrate 2 with respect to the wire fed between the pair of upper and lower wire feeding rollers 4A and 4B and fed from the quill 3 and moved forward and backward toward the quill is provided. A hook part and a coil part are shape | molded by abutting with a wire. This summary is well known and will not be described in detail.
[0011]
First, a bending tool device 10 embodying the present invention will be described.
[0012]
The main body 11 of the bending tool device 10 is disposed on the top plate of the support base 12 provided on the front surface of the base 1 in parallel with the axis below the quill 3 and is rotatably supported by the front and rear bearings 13 and 13. It is driven forward and backward by the ball screw 14. A female screw 16 that engages with the ball screw 14 is attached to the lower surface of the main body 11, and the main body 11 has linear bearings 18 on horizontal guides 17, 17 provided in parallel on both sides of the top plate ball screw 14 of the support 12. , 18 for guidance.
[0013]
The support base 12 is provided with a servo motor 19 that is driven and controlled by an NC device (not shown). A timing belt 21 spanned between the pulley of the output shaft of the servo motor 19 and the pulley of the shaft end of the ball screw 14. The ball screw 14 is rotationally controlled.
[0014]
A housing 22 is mounted concentrically with the quill shaft center on the quill 3 side surface of the main body 11, and a cylindrical shaft 24 is rotatably supported by bearings 23 and 23 at the center thereof. A large gear 26 is fastened to the rear end surface of the cylindrical shaft 24 with a bolt. A pinion 27 that meshes with the large gear 26 is connected to an output shaft of a servo motor 29 that is driven and controlled by an NC device and provided on the rear surface of the main body 11 via a coupling 28. A fluid coupling 31 is attached to the front end flange of the cylindrical shaft 24 by bolts, and pressure air supply paths 32A and 32B to a bending tool advancing / retreating air actuator, which will be described later, are connected thereto. Further, a gear case 33 is fastened to the side surface of the frame body of the fluid coupling 31 with a bolt, and the gear case 33 is rotated together with the rotation of the cylindrical shaft 24.
[0015]
At the center of the cylindrical shaft 24, a central shaft 36 is supported concentrically with the quill central shaft so as to be rotatable by bearings 34, 34. The central shaft 36 passes through the large gear 26 and a large gear 37 is keyed to the rear end. A pinion 38 that meshes with the large gear 37 is connected to an output shaft of a servo motor 41 that is driven and controlled by an NC device provided on the rear surface of the main body 11 via a coupling 39. A bevel gear 42 is keyed to the shaft end of the central shaft 36 that protrudes into the gear case 33.
[0016]
A rotating shaft 43 orthogonal to the central axis of the central shaft 36, that is, the axial center of the quill 3 is rotatably supported by the gear case 33 by bearings 44 and 44. A bevel gear 46 that meshes with the bevel gear 42 is keyed to the rotary shaft 43 and a spur gear 47 is keyed. On the quill 3 side of the gear case 33, a rotating tool 48 having a bending tool attached at the tip thereof and parallel to the rotating shaft 43, that is, perpendicular to the quill axis line, is provided with a pinion 49 at the center. It is supported so that it can move in the direction. The pinion 49 is rotationally connected to the spur gear 47 by an intermediate gear 52 that is rotatably supported by a bearing 51.
[0017]
A fixed shaft 53 penetrates through the center of the rotating shaft 48, and a front end and a rear end protrude, and a rear end protruding portion is fixed to a C-shaped connecting piece to be described later with a set screw. Two fixed pins 53a and 53a are planted on the projecting end face of the front end so as to be able to sandwich the wire when advanced for bending, and symmetrically with a gap of the wire diameter.
A cap-shaped tool holder 54 is replaceably fitted to the end of the rotating shaft 48 on the quill axis side and is fixed by a set screw. On the end face of the tool holder 54, a projection 54a is formed as a bending tool that engages and bends with the wire when turning.
[0018]
An air actuator 56 is attached to the gear case 33 via a holding plate 55 adjacent to the rear end of the rotation shaft 48. A C-shaped connecting piece 57 is fixed to the output shaft of the air actuator 56, and the opposing claw portion 57 a is rotatably engaged with a circumferential groove 48 b provided at the rear end portion of the rotating shaft 48. . Accordingly, the rotation shaft 48 and the fixed shaft 53 are moved forward and backward by the operation of the air actuator 56, and the fixed pins 53a and 53a of the fixed shaft 53 sandwich the wire fed from the quill 3 and the projection 54a engages with the wire when moving forward. It becomes a position to be able to.
[0019]
Next, the forming tool device will be described with reference to FIGS.
[0020]
The forming tool device 60 is provided with a slide base 61 having a guide surface in the vertical direction toward the quill 3. A slider 62 is movably mounted on the slide base 61, and a forming tool 63 is replaceably provided at a quill side end via a tool holder. A bearing housing is attached through the slide table 61 and the substrate 2 adjacent to the slide guide surface, and a rotary shaft 64 with a flange is rotatably supported through the bearing at the center. A small gear 65 is keyed on the rotating shaft 64 at the rear end protruding from the substrate 2 and meshed with a large gear 66 that is rotatably provided on the back surface of the substrate and is rotated by a servo motor controlled by an NC device. ing.
[0021]
A plate cam 67 is fixed to the front end of the rotating shaft 64. Further, a lever 69 is pivotally supported on a support shaft 68 erected on the slide base 61, and a cam follower 71 that contacts the plate cam 67 is pivotally supported in the middle. The tip of the lever 69 is pivotally connected to the pin of the slider 62. The tension spring 72 stretched between the slider 62 and the slide base 61 is always urged in the anti-quill direction, and the plate cam 67 and the cam follower 71 are always kept in contact with each other.
[0022]
Although the cutting tool device is not particularly shown, it is arranged in a 45 ° right oblique direction with respect to the forming tool device 60 in the vertical direction. Since the configuration is the same except that the forming tool 63 of the forming tool device is replaced with a cutting tool 75, no particular description will be given.
[0023]
With respect to the torsion spring in which the first hook shown in FIG. 6 is twisted using the forming tool device 60 configured as described above, a forming method will be described with reference to FIGS. 7 to 17 showing process diagrams.
[0024]
In FIG. 7 showing the initial standby state, the advancing / retreating direction of the tool of the bending tool device 10 is determined by the relationship between the interference with other parts and the twist angle of the hook portion of the forming spring. The apparatus is in the retracted standby position, and the forming tool 63 and the cutting tool 75 are also in the retracted standby position. Since the twist angle of the first hook is 30 ° with respect to the leg of the first hook portion, the servo motor 29 is driven by the command of the NC device, and the fixed shaft is tilted by 30 ° with respect to the vertical line. 53, The rotation shaft 48 is positioned and set in the retracted position. Further, the rotation shaft 48 is turned by the servo motor 41 so that the protrusion 54a is in the lower position in FIG. 7B.
[0025]
In FIG. 8 showing the first machining process, the wire W is fed out from the quill 3 for a predetermined length by the controlled rotation of the wire feed rollers 4A and 4B by the servo motor in response to a command from the NC apparatus. The wire W is projected from the bending position by the length necessary for hook bending. When the feeding of the wire W is finished, the bending tool device 10 is advanced. That is, the ball screw 14 is driven by the rotation of the servo motor 19 in accordance with a command from the NC device, and the bending tool device 10 is advanced and positioned toward the end of the quill 3. Next, the front chamber of the air actuator 56 is opened, pressure air is sent to the rear chamber, and the rotary shaft 48 and the fixed shaft 53 are moved forward toward the wire rod. By this advancement, the wire W on which the fixing pins 53a and 53a are stopped is pinched.
[0026]
In FIG. 9 showing the second machining step for bending the first hook hook Wa, the servo motor 41 is driven by the command of the NC device, the pinion 38, the large gear 37, the bevel gears 42 and 46, the spur gear 47, and the middle. The rotating shaft 48 is turned counterclockwise in FIG. 9B through the gear 52 and the pinion 49, and the tip end of the wire W on which the projection 54a is stopped is hooked and turned 180 ° or more to make the folding hook Wa. Form.
[0027]
In FIG. 10 showing the third machining step, the servo motor 41 is reversely rotated to return the protrusion 54a to the initial lower position. The rear chamber of the air actuator 56 is opened and pressurized air is sent to the front chamber and is operated in the backward direction, so that the rotating shaft 48 and the fixed shaft 53 are set in the retracted position together with the fixing pins 53a and 53a and the protrusion 54a. When the protrusion 54a moves away from the bent portion of the wire W, the hook bent by the spring back of the wire W becomes substantially parallel to the wire feed direction as shown in the figure. Since the amount of springback differs depending on the wire, it is necessary to determine an extra bending amount in advance by a few preliminary forming operations.
[0028]
In FIG. 11 showing the fourth machining step, the servo motor 29 is driven to adjust the direction of the rotating shaft 48 and the fixed shaft 53 to the twist angle of 30 ° with respect to the leg of the first hooking portion of the hook Wa, and the gear case. 33 is rotated so that the fixed shaft 53 and the rotation shaft 48 are in the vertical direction as shown in the figure. Further, the wire rod feeding rollers 4A and 4B are controlled to rotate, and the wire rod is fed Wb corresponding to the length of hook wa.
[0029]
In FIG. 12 showing the fifth processing step, the air actuator 56 is actuated in the forward direction to advance the rotating shaft 48 and the fixed shaft 53, and the leg portion following the first hook is held between the fixed pins 53a and 53a.
[0030]
In FIG. 13 showing the sixth processing step for twisting the hooks Wa and Wb, the servo motor 41 is driven and the rotating shaft 48 is rotated around the fixed shaft 53 in consideration of the spring back amount from the predetermined amount. Turn counterclockwise by many 90 degrees or more.
[0031]
In FIG. 14 showing the seventh processing step, the servo motor 41 is rotated in the reverse direction so that the protrusion 54a is returned to the lower position in the drawing to be separated from the wire. The hooks Wa and Wb are substantially perpendicular to the wire feeding direction by the spring back and are twisted at a predetermined angle of 30 °. The air actuator 56 is operated to move the rotation shaft 48 and the fixed shaft 53 together with the projection 54a and the fixed pins 53a and 53a to the standby position.
[0032]
In FIG. 15 showing the eighth machining step, the servo motor 19 is driven to place the entire bending tool device 10 in the standby position (not shown). When the length of the first hook leg Wc is insufficient, the wire feed rollers 4A and 4B are rotationally controlled to send out the short length.
[0033]
In FIG. 16 showing the ninth machining step for forming the coil portion of the torsion spring, the large gear 66 is controlled and rotated by the command of the NC device, and the slider 62 is directed to the quill 3 via the small gear 65, the plate cam 67, and the lever 69. The wire rod feed rollers 4A and 4B are rotated, the wire rod is fed from the quill 3 and the wire rod W is brought into contact with the molding surface of the molding tool 63 to form the coil portion Wd with a predetermined number of turns.
[0034]
In FIG. 17 showing the tenth processing step, the slider 62 and the forming tool 63 of the forming tool device 60 are retracted by the rotation of the plate cam 67, and the wire feeding rollers 4A and 4B are driven to move the wire W to the rear hooking portion. Send out the length of the leg We. Next, the cutting tool 75 of the cutting tool device is advanced and cut with the front surface of the quill 3 leaving behind the legs We of the hooks. As a result, one torsion spring is completely formed.
[0035]
In the eleventh machining step, the cutting tool 75 is retracted and the servo motor 29 is driven to rotate the gear case 33, so that the rotating shaft 48 and the fixed shaft 53 are moved to the first position in FIG. return. This completes one molding cycle. The single fixing pin 53a can be used as a mandrel.
[0036]
FIG. 18 shows another embodiment in which the fixing pins 53a and 53a of the bending tool device 10 are replaced. This uses the center of the front end face of the fixed shaft 53 in which a groove 53b having the same width as the wire diameter is cut at a position where the wire feed line passes through the center when moving forward. A case where the hook Wf of the hook portion of the torsion spring shown in FIG. 19 is twisted and bent using this apparatus will be described.
In FIG. 20 which shows the 1st process process of the hook bending by the groove | channel 53b, this process is the same as the 1st process in the previous Example, and the sent wire W is clamped by the groove | channel 53b of the fixed shaft 53 advanced. The
[0037]
In FIG. 21 showing the second processing step, the difference from the second processing step of the previous embodiment of this step is that the hook Wf is U-shaped, so that the rotation angle of the rotation shaft 48 is reduced, and the protrusion 54a. Is rotated at an angle obtained by adding the springback to 90 °.
[0038]
In FIG. 22 showing the third processing step, this step is the same as the third processing step of the previous embodiment, and the rotation shaft 48 reversely rotates so that the projection 54a returns to the initial position and retracts in the axial direction. The hook Wf is spring-back and faces in a right angle direction. Since the following steps are the same as those in the previous embodiment, description thereof is omitted.
[0039]
Furthermore, another embodiment in which the fixed shaft 53 of the bending tool device 10 is eliminated will be described with reference to FIG.
[0040]
The same parts as those in FIG. A pair of pins 54b, 54b is formed by eliminating the fixed pin 53a, 53a projecting from the fixed shaft, eliminating the fixed shaft at the center of the rotating shaft 48, and eliminating the protrusion 54a from the tool holder 54 so that the wire can pass therethrough. And one pin thereof is positioned at the rotation center of the rotation shaft. When this bending tool is used, a tool for bending is arranged in advance so that the center of the wire fed from the quill 3 is at the center between the pair of pins 54b and 54b. Then, the bending tool, that is, the rotating shaft is advanced, and the wire is sandwiched between the pair of pins 54b and 54b and rotated to be bent.
[0041]
FIG. 25 is a view in which the positions of the pins 54b and 54b in FIG. 24 are changed, and they are arranged so that the rotation axis of the rotation shaft 48 coincides with the center between the pair of protruding pins 54c and 54c. When this bending tool is used, the wire rod is bent by advancing the bending tool, that is, the rotation shaft, pinching the wire rod between the pair of pins 54c and 54c and rotating the wire rod.
[0042]
【The invention's effect】
Since this invention is as above-mentioned, there exist the following effects.
It can be twisted and bent in any direction by positioning it at any position around the quill axis corresponding to various springs with different twist angles of the spring hook, and it can be bent at a large angle of the hook that can not be done with a forming tool It is possible to bend or reverse bend, and to cope with a wide range of spring shapes.
Furthermore, since various twists and bends can be handled by using one bending tool device, it is possible to suppress an increase in the price of a machine with a wire bending device, and to reduce the cost of the product.
[Brief description of the drawings]
FIG. 1 is a front explanatory view showing a part of a wire rod processing machine for carrying out the method of the present invention in section.
FIG. 2 is an explanatory cross-sectional view of a tool driving portion of a bending apparatus.
FIG. 3 is an AA view of FIG. 1;
4 is a view in which a pulley portion is omitted from the BB view of FIG. 1;
FIG. 5 is an explanatory side view of the forming tool device.
6A and 6B are diagrams showing an example of a torsion spring, where FIG. 6A is a front view, and FIG. 6B is a side view.
7A and 7B are diagrams illustrating a bending tool device, a forming tool, and a cutting tool in a standby state before the torsion spring shown in FIG. 6, in which FIG. 7A is a diagram illustrating a positional relationship of the tool, and FIG. FIG.
8A and 8B are diagrams for explaining a first machining step of the torsion spring of FIG. 6, in which FIG. 8A is a diagram showing a positional relationship of tools, and FIG. 8B is a DD view of FIG.
9A and 9B are diagrams for explaining a second processing step of the torsion spring of FIG. 6, in which FIG. 9A is a view showing a positional relationship of tools, and FIG. 9B is an EE view of FIG.
10A and 10B are views for explaining a third processing step of the torsion spring of FIG. 6, in which FIG. 10A is a view showing a positional relationship of tools, and FIG. 10B is a view taken along line FF in FIG.
11A and 11B are diagrams for explaining a fourth processing step of the torsion spring of FIG. 6, in which FIG. 11A is a diagram showing a positional relationship of tools, and FIG. 11B is a GG view of FIG.
12A and 12B are diagrams for explaining a fifth processing step of the torsion spring of FIG. 6, in which FIG. 12A is a diagram showing a positional relationship of tools, and FIG. 12B is a view taken along line HH in FIG.
13A and 13B are views for explaining a sixth machining step of the torsion spring of FIG. 6, wherein FIG. 13A is a view showing the positional relationship of tools, and FIG. 13B is a view taken along line JJ of FIG.
14A and 14B are diagrams for explaining a seventh processing step of the torsion spring of FIG. 6, in which FIG. 14A is a diagram showing a positional relationship of tools, and FIG. 14B is a KK view of FIG.
15A and 15B are views for explaining an eighth machining step of the torsion spring of FIG. 6, in which FIG. 15A is a view for explaining tool arrangement, and FIG. 15B is an LL view of FIG.
16A and 16B are diagrams for explaining a ninth processing step of the torsion spring of FIG. 6, in which FIG. 16A is a diagram for explaining tool arrangement, and FIG. 16B is a MM view of FIG.
FIGS. 17A and 17B are diagrams illustrating a tenth processing step of the torsion spring of FIG. 6, in which FIG. 17A is a view in which the spring is cut, and FIG. is there.
18A and 18B are diagrams showing another embodiment in place of the pins of the bending tool, in which FIG. 18A is a front view and FIG. 18B is a P-P view of FIG.
19A and 19B are diagrams showing another example of a torsion spring, where FIG. 19A is a front view and FIG. 19B is a side view.
20A and 20B are diagrams for explaining a second processing step of the torsion spring of FIG. 19, in which FIG. 20A is a diagram showing a positional relationship of tools, and FIG. 20B is a QQ view of FIG.
FIGS. 21A and 21B are views for explaining a third processing step of the torsion spring of FIG. 19, wherein FIG. 21A is a view showing the positional relationship of the tool, and FIG. 21B is an RR view of FIG.
22A and 22B are diagrams for explaining a fourth processing step of the torsion spring of FIG. 19, in which FIG. 22A is a diagram showing a positional relationship of tools, and FIG. 22B is an SS view of FIG.
FIGS. 23A and 23B are diagrams showing an example of the twist angle of the hook hook at the beginning of the torsion spring, wherein FIG. 23A is a front view and FIG. 23B is a side view.
FIG. 24 is a view showing another embodiment of the bending tool.
FIG. 25 is a diagram showing another embodiment of the position of the pin engaged with the wire.
[Explanation of symbols]
2 Substrate 3 Quill 4A, 4B Wire rod feed roller 10 Bending tool device 19, 29, 41 Servo motor 22 Housing 48 Rotating shaft 53 Fixed shaft 53a, 53a Fixed pin 53b Groove 54a Projection 54b, 54c Pin 60 Molding tool device 62 Slider 63 Forming tool 66 Large gear 67 Plate cam

Claims (7)

A wire rod forming method in which a tool is engaged with or abutted against a wire rod fed out from a quill and bending is performed on the wire rod, and a pair of engagement members at intervals through which the wire rod fed from the quill can pass A bending tool which can be rotated and positioned around the axis of the quill on the front surface of the quill, can be rotated about an axis orthogonal to the quill axis, and can be moved back and forth in the axial direction, is advanced in the direction of the orthogonal axis, and the engagement Including a step of determining the bending direction or the bending direction of the wire by positioning the bending tool around the quill axis before or after the step of bending the joint member engaged with the fed wire and rotating around the shaft. A method of forming a wire, characterized in that a twist is added. A wire rod forming method in which a tool is engaged with or abutted against a wire rod fed out from a quill and bending is performed on the wire rod, and a pair of engagement members at intervals through which the wire rod fed from the quill can pass A bending tool that can be rotated and positioned around the axis of the quill on the front surface of the quill, can be rotated on an axis orthogonal to the quill axis, and can be moved back and forth in the axial direction, is advanced in an axial direction orthogonal to the quill axis. And engaging the engaging member with the wire fed from the quill for a predetermined length and rotating it around an axis orthogonal to the quill to bend the wire at a predetermined angle, and then separating the engaging member from the wire to remove the wire. Further, a step of feeding a predetermined amount, and then rotating and positioning the bending tool around a predetermined angle quill axis, and again feeding the bending tool forward. Molding process of the wire, characterized in that the twist is applied by including a step of providing a bending the bending tool engaging member from engaged is rotated in an axis orthogonal to the quill to the wire successively. A wire rod forming method for engaging or abutting a tool with a wire rod fed out from a quill and bending the wire rod, etc., and a shaft formed with an engaging portion engaged with at least one side surface of the wire rod, An outer cylinder, which is rotatable about this axis and has a protrusion engaging the other side of the wire at the tip, can be rotated and positioned around the axis of the quill on the front surface of the quill, and in a direction perpendicular to the quill axis. The wire bending means capable of advancing / retracting positioning is rotated and positioned around the quill axis line at a predetermined angle, and the engaging portion is engaged with the wire line fed out by advancing the shaft and the outer cylinder in a direction perpendicular to the quill axis line. A method of forming a wire, characterized in that a twist is applied by including a step of bending the wire by means of a protrusion by turning the outer cylinder together. A wire rod forming method for engaging or abutting a tool with a wire rod fed out from a quill and bending the wire rod, etc., and a shaft formed with an engaging portion engaged with at least one side surface of the wire rod, A direction that can rotate around the axis of the quill and that is orthogonal to the quill axis, on the front surface of the quill, with an outer cylinder that is rotatable about this axis and that has a protrusion engaging the other side of the wire at the tip The wire bending means that can be moved forward and backward is advanced in the orthogonal direction to engage the engaging portion with the wire fed from the quill for a predetermined length, and the outer cylinder is rotated to bring the wire into a predetermined angle by the protrusion. Bending process;
Next, separating the engagement portion and the protrusion from the wire, and feeding the wire further by a predetermined amount;
Next, the wire bending means is rotated and positioned around the quill axis at a predetermined angle, the engaging portion and the protrusion are advanced, the engaging portion is re-engaged with the fed wire, and the outer cylinder is rotated. A method of forming a wire, characterized in that a twist is applied by sequentially including a step of bending the wire with a protrusion. The wire rod forming method according to claim 1 or 4, wherein the engaging portion uses a pair of pins capable of sandwiching the wire rod. The method for forming a wire according to claim 3 or 4, wherein the engaging portion uses a single pin in contact with one side of the wire as a mandrel. The wire forming method according to claim 1 or 4, wherein the engaging portion uses a wire holding groove capable of holding the wire.

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