JP2020146705A - Wire feeding device - Google Patents

Abstract

To provide a wire feeding device which can reduce labor for roller exchange.SOLUTION: A wire feeding device 10 feeds a wire 90 while sandwiching the wire by a pair of rotating rollers 21, 22. A first roller support part 31 which rotatably supports one roller 21, and a second roller support part 32 which rotatably supports the other roller 22 are movably supported so as to approach and separate from each other while rotation axes J1, J2 of the pair of rollers 21, 22 being kept parallel. The wire feeding device comprises: a positioning device 75 which positions the first roller support part 31 at any position; and an air cylinder 39 which energizes the second roller support part toward the first roller support part.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a wire rod feeding device in which a wire rod is sandwiched and fed by a pair of rotating rollers.

Conventionally, in this type of wire rod feeding device, the rollers have been replaced according to the thickness of the wire rod (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2004-082198 (Fig. 2)

Japanese Unexamined Patent Publication No. 2014-057982 (Fig. 1)

Compared to the conventional wire rod feeding device described above, there is a demand for the development of a technique for reducing the trouble of replacing rollers.

The invention of claim 1 made to solve the above problems is a first roller that rotatably supports one of the rollers in a wire rod feeding device that feeds the wire rod by sandwiching the wire rod between a pair of rotating rollers. The support portion, the second roller support portion that rotatably supports the other roller, the first roller support portion, and the second roller support portion are maintained in parallel with the rotation axes of the pair of rollers. A moving support mechanism that movably supports the first roller support portion so as to approach and separate from each other, a position adjusting device that positions the first roller support portion at an arbitrary position, and the second roller support portion on the first roller support portion. It is a wire rod feeding device including an urging device for urging toward.

The invention according to claim 2 is the wire rod feeding device according to claim 1, further comprising a first servomotor and a second servomotor that separately drive the pair of rollers.

According to the third aspect of the present invention, a pair of the rotating radius of the contact portion with the wire rod in one of the rollers and the rotational radius of the contact portion with the wire rod in the other roller are different. The wire rod feeding device according to claim 2, further comprising a speed control unit for making the rotational speeds of the rollers different and matching the peripheral speeds of both the contact portions.

According to the fourth aspect of the present invention, the position adjusting device includes a position adjusting servomotor which is a drive source for moving the first roller support portion, wire rod data for specifying the thickness of the wire rod, and the first roller support. When the data table corresponding to the position data of the unit and the wire rod data are assigned, the position where the first roller support unit is positioned and controlled by the position adjusting servomotor based on the corresponding position data. The wire rod feeding device according to any one of claims 1 to 3, which is provided with a control unit.

The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the position adjusting device is provided with an adjusting bolt for manually adjusting the position of the first roller support portion. It is a wire rod feeding device.

According to a sixth aspect of the present invention, the moving support mechanism includes a slider fixed to the first roller support portion and the second roller support portion, respectively, and the first roller support portion and the second roller support portion. The wire rod feeding device according to any one of claims 1 to 5, wherein the slider includes a guide rail that is slidably engaged in common.

In the wire rod feeding device of claim 1, the first and second roller support portions that support the pair of rollers can be moved so as to keep the rotation axes of the pair of rollers parallel and approach and separate from each other. Is supported by. Then, while the first roller support portion can be positioned at an arbitrary position, the second roller support portion is urged toward the first roller support portion, so that the first roller support portion is supported according to the thickness of the wire rod. It is possible to change the position of the part. As a result, the frequency of roller replacement for wires of different thickness can be reduced, and the labor of roller replacement can be reduced.

The urging force for urging the second roller support portion toward the first roller support portion may be the elastic force of an elastic body such as a spring or rubber, or the output of an air cylinder or a servomotor.

Since the wire rod feeding device according to claim 2 is provided with the first and second servomotors that separately drive the pair of rollers, the rotation speeds of the pair of rollers are made different to prevent the wire rod from bending. It can be removed and bent. Further, when the turning radius of the contact portion with the wire rod on one roller and the turning radius of the contact portion with the wire rod on the other roller are different, as in the wire rod feeding device of claim 3. The rotational speeds of the pair of rollers can be made different so that the peripheral speeds of both abutting portions can be matched. By doing so, the pair of rollers may have different sizes, and the degree of freedom in combining the pair of rollers is increased.

In the wire rod feeding device of claim 4, when the wire rod data for specifying the thickness of the wire rod is input, the first roller support portion is positioned and controlled at a position corresponding to the wire rod data, so that when the wire rod is replaced. Effort is reduced.

In the wire rod feeding device according to claim 5, the position of the first roller support portion can be changed by manually operating the adjusting bolt, and the wire rod feeding device can be manufactured at low cost.

In the wire rod feeding device of claim 6, the slider to which the first roller support portion is fixed and the slider to which the second roller support portion is fixed are slidably engaged with the common guide rail. The entire wire feeding device becomes compact.

In the wire rod feeding device according to any one of claims 1 to 6, the first roller support portion and the second roller support portion support a plurality of pairs of rollers that sandwich the wire rod. It may be configured as such. In such a wire rod feeding device, a first servomotor which is a common drive source for a plurality of the rollers supported by the first roller support portion, and a plurality of the rollers supported by the second roller support portion. A second servomotor, which is a common drive source of the above, may be provided.

Side sectional view of a forming machine having the wire rod feeding device of the first embodiment Rear sectional view of the forming machine Rear sectional view of wire rod feeding device Cross section of roller Cross-sectional view of a pair of rollers sandwiching a wire Rear sectional view of the wire rod feeding device of the second embodiment A block diagram showing a controlled configuration of a wire rod feeding device according to a third embodiment.

Hereinafter, embodiments of the wire rod feeding device 10 will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the wire rod feeding device 10 of the present embodiment is provided as a part of the forming machine 11. The forming machine 11 is provided with a wire rod feeding device 10 on the rear side of the main support board 12 that stands vertically, and is provided with a plurality of tool drive mechanisms 99 on the front side of the main support board 12. Then, the tools 99T of the plurality of tool drive mechanisms 99 are pressed against the wire rod 90 (see FIG. 4) fed from the wire rod feeding device 10 through the through hole 13 of the main support plate 12, and the wire rod forming a predetermined shape is formed. The product is molded.

Further, in order to support the wire rod 90 on the front surface side of the main support plate 12, a conical wire rod support protrusion 15 generally called a “quill” projects from the front surface of the main support plate 12. On the other hand, in order to support the wire rod 90 on the rear surface side of the main support plate 12, the guide nozzle 14 is fitted into the through hole 13 of the main support plate 12 and extends rearward. Then, the wire rod 90 fed from the wire rod feeding device 10 to the central hole 14A of the guide nozzle 14 passes between the plurality of support rollers 15R in the wire rod support protrusion 15 and from the tip of the wire rod support protrusion 15. It is sent.

Hereinafter, the straight line including the center line of the center hole 14A is referred to as "wire rod feeding line L1", and the direction parallel to the wire rod feeding line L1 is referred to as "wire rod feeding direction".

As shown in FIG. 1, the wire rod feeding device 10 has a roller 21 having a rotating shaft J1 below the wire rod feeding line L1 and a roller 22 having a rotating shaft J2 above the wire rod feeding line L1. Both of these rotation axes J1 and J2 are orthogonal to the wire rod feeding direction, and the rotation axis J2 is located directly above the rotation axis J1. Then, as shown in FIG. 4, the rollers 21 and 22 rotate with the wire rod 90 sandwiched from above and below, and the wire rod 90 is fed.

As shown in FIG. 2, the lower roller 21 is attached to one end of the first rotating shaft 41 rotatably supported by the first roller support 31, and the upper roller 22 is the second roller support. It is attached to one end of a second rotating shaft 42 that is rotatably supported by 32.

Specifically, the first and second roller support portions 31 and 32 have a first side surface 31A and 32A that are substantially flush with each other and a second side surface 31B that is substantially flush with each other on their opposite sides. , 32B and. As shown in FIG. 3, the first and second rotary shafts 41 and 42 have a flange 80 and a roller fitting portion 81 protruding from the center of the flange 80, respectively, in portions protruding from the first side surfaces 31A and 32A. To be equipped. Further, the rollers 21 and 22 are donut-shaped and are fitted to the roller fitting portions 81, and are screwed to one ends of the first and second rotating shafts 41 and 42, respectively, to the flange 80 with caps 82. It is being pressed. Further, as shown in FIG. 4, the rollers 21 and 22 are integrally rotatably connected to the flange 80 by a pin 80P.

A V-groove 85 and a square groove 86 are formed on the outer peripheral surfaces of the rollers 21 and 22 over the entire circumference. The V-groove 85 has a V-groove shape in which a pair of inner side surfaces are open at an obtuse angle, and the square groove 86 has a square groove shape whose bottom surface is parallel to the rotation axis J1. The V-grooves 85 face each other and the square grooves 86 face each other between the rollers 21 and 22. Further, the distance S1 from the center of the V-groove 85 in the width direction to the side surface of the rollers 21 and 22 close to it and the distance S2 from the center of the square groove 86 in the width direction to the side surface of the rollers 21 and 22 close to it are the same. It has become. Then, in the state shown in FIG. 4, the center in the width direction of the V-groove 85 is located directly above or directly below the wire rod feeding line L1, and the front and back of the rollers 21 and 22 are displayed from the state shown in FIG. When the roller fitting portion 81 is fitted in the opposite direction, the center of the square groove 86 in the width direction is located directly above or directly below the wire rod feeding line L1.

As shown in FIG. 3, gears 41G and 42G are integrally rotatably fixed to portions of the first and second rotating shafts 41 and 42 protruding from the second side surfaces 31B and 32B, respectively. Further, the second side surface 31B of the first roller support portion 31 is provided with a motor support protrusion 51B at a position below the gear 41G, and a first servomotor 51 integrated with a speed reducer is attached thereto. Then, the gear 51G fixed to the output shaft of the first servomotor 51 and the gear 41G are meshed with each other. On the other hand, the second side surface 32B of the second roller support portion 32 is provided with a motor support protrusion 52B at a position above the gear 42G, and a second servomotor 52 integrated with a speed reducer is attached thereto. Then, the gear 52G fixed to the output shaft of the second servomotor 52 and the gear 42G are meshed with each other.

The first and second roller support portions 31, 32 are movably supported so as to keep the rotation axes J1 and J2 of the pair of rollers 21 and 22 parallel to each other and approach and separate from each other. Specifically, as shown in FIGS. 1 and 2, the support frame 19 including the main support plate 12 supports the motor among the second side surfaces 31B and 32B of the first and second roller support portions 31 and 32. A pair of base support walls 18 facing both side portions of the protrusions 51B and 52B and extending in the vertical direction are provided. A pair of guide rails 34 extending in the vertical direction are fixed to the base support walls 18. Further, a total of four sliders 35, one pair each, are slidably engaged with each guide rail 34. The first roller support portion 31 is fixed to both lower sliders 35, while the second roller support portion 32 is fixed to both upper sliders 35. As described above, since the slider 35 to which the first roller support portion 31 is fixed and the slider 35 to which the second roller support portion 32 is fixed are slidably engaged with the common guide rail 34, the wire rod The entire feeding device 10 becomes compact.

In the present embodiment, the "moving support mechanism" for supporting the first and second roller support portions 31 and 32 is composed of the guide rail 34 and the slider 35. For example, the first and second rollers A plurality of columns that vertically penetrate the roller support portions 31 and 32 may be provided. Further, the first and second roller support portions 31 and 32 are configured to rotate around the rotation center parallel to the rotation axes J1 and J2 of the first and second roller support portions 31 and 32. You may move in an arc.

The position of the first roller support portion 31 is controlled by the position adjusting servomotor 36 at an arbitrary position in the vertical direction. Specifically, as shown in FIG. 2, a ball screw 37 extending in the vertical direction can rotate and move to a lower support protrusion 17 provided below the first roller support portion 31 of the support frame 19. It is supported by the impossible. A ball nut 38 screwed into a portion of the ball screw 37 that protrudes upward from the lower support protrusion 17 is fixed to the first roller support portion 31. A worm wheel 37G is fixed to the lower end of the ball screw 37 and meshes with a worm gear (not shown). Then, the position adjusting servomotor 36 is attached to the side surface of the lower support protrusion 17 via the speed reducer 36G, and the output shaft of the speed reducer 36G is connected to the worm gear (not shown). As described above, in the present embodiment, the position adjusting device 75 (see FIGS. 2 and 3) includes the above-mentioned position adjusting servomotor 36, ball screw 37, and ball nut 38.

The second roller support portion 32 is urged toward the first roller support portion 31 side by an air cylinder 39, which is a “biasing device” within the scope of the claims. Specifically, the air cylinder 39 is attached to the upper surface of the upper support protrusion 16 provided above the second roller support portion 32 in the support frame 19. Then, the drive rod 39R of the air cylinder 39 extends downward from the upper support protrusion 16 and is connected to the second roller support 32 through the through hole 16A that vertically penetrates the upper support protrusion 16.

This concludes the description of the configuration of the wire rod feeding device 10 of the present embodiment. Next, the action and effect of the wire rod feeding device 10 will be described. In the wire rod feeding device 10 of the present embodiment, the first and second roller support portions 31 and 32 that support the pair of rollers 21 and 22 parallel the rotation axes J1 and J2 of the pair of rollers 21 and 22. It is movably supported so as to approach and separate from each other. Then, while the first roller support portion 31 can be positioned at an arbitrary position, the second roller support portion 32 is urged toward the first roller support portion 31, so that it depends on the thickness of the wire rod 90. The position of the first roller support portion 31 can be changed to cope with the situation.

Specifically, in the case of the wire rod 90 having a circular cross section, even if the wire diameter of the wire rod 90 is changed within a certain range, the wire diameter of the wire rod 90 is changed as shown in FIGS. 5 (A) and 5 (B). It can be dealt with by changing the position of the first roller support portion 31 accordingly. Further, when the wire rod 90 having a circular cross section is changed to the wire rod 90 having a quadrangular cross section, the front and back surfaces of the rollers 21 and 22 may be inverted and attached to the first and second rotating shafts 41 and 42. Then, even if the size of the cross-sectional quadrangle of the wire rod 90 is changed within a certain range, the position of the first roller support portion 31 can be changed as shown in FIGS. 5 (C) and 5 (D). can do.

In this way, in the wire rod feeding device 10 of the present embodiment, the frequency of replacement of the rollers 21 and 22 for the wire rods 90 having different thicknesses can be reduced, and the labor of replacing the rollers 21 and 22 can be reduced. Further, since the first and second servomotors 51 and 52 that drive the pair of rollers 21 and 22 separately are provided, the rotation speeds of the pair of rollers 21 and 22 are different and the wire rod 90 has a bending habit. Can be removed or bent. Further, when the radius of gyration of the contact portion with the wire rod 90 in one roller 21 and the radius of gyration of the contact portion with the wire rod 90 in the other roller 22 are different, the rotations of the rollers 21 and 22 The peripheral speeds of both contact portions can be matched by different speeds. By doing so, the pair of rollers 21 and 22 may have different sizes, and the degree of freedom in combining the pair of rollers 21 and 22 is increased.

Specifically, the ratio of the radius to the bottom surface of the square groove 86 of the other roller 22 to the radius to the bottom surface of the square groove 86 of one roller 21 is obtained as a "radius ratio", and the wire rod feeding device 10 is used. By manually operating the controller, the rotation speed of the rotation output of the second servomotor 52 may be set to be a value obtained by multiplying the rotation speed of the rotation output of the first servomotor 51 by the radius ratio. In this case, the CPU of the controller that outputs the speed command value to the servo amplifier of the second servomotor 52 according to the setting corresponds to the "speed control unit" in the claims.

It should be noted that the rotation speed of one of the outputs of the first and second servomotors 51 and 52 is changed while observing the current values of the first and second servomotors 51 and 52 without obtaining the radius ratio. Even if the rotation speed is fixed to the smallest value, the peripheral speed of the contact portion of the pair of rollers 21 and 22 with the wire rod 90 can be made the same. Further, such adjustment of the rotation speed may be performed manually, and the current monitoring unit for monitoring the current values of the first and second servomotors 51 and 52 and the first one having the smallest current value. It may be automatically performed by providing a calculation unit for calculating the speed ratio of the second servomotors 51 and 52.

[Second Embodiment]
The wire rod feeding device 10A of the present embodiment will be described with reference to FIG. In this wire rod feeding device 10A, the second roller support portion 32 is connected to the ball screw mechanism 60 having the ball screw 37 and the ball nut 38 as in the first roller support portion 31, and the urging servomotor 61 It is moved up and down by (corresponding to the "biasing device" in the claims). Then, the holding force of the pair of rollers 21 and 22 can be set to an arbitrary value by changing the current value to the urging servomotor 61. Then, when the position of the first roller support portion 31 is changed according to the thickness of the wire rod 90, the second roller support portion 32 is attached to a position where the holding force of the pair of rollers 21 and 22 becomes a set value. It is moved by the force servomotor 61.

It should be noted that the holding force of the pair of rollers 21 and 22 is set in advance according to the hardness due to the difference in the material of the wire rod 90, and the wire rod data for specifying the material of the wire rod 90 is input to the controller of the wire rod feeding device 10. By doing so, the wire rod 90 may be sandwiched by the rollers 21 and 22 with a sandwiching force suitable for the material. Further, the urging force of the air cylinder 39 can be arbitrarily changed by providing the air cylinder 39 of the first embodiment with a pressure control valve so that the gas in the air cylinder 39 is released at an arbitrary pressure. It may be configured.

[Third Embodiment]
The wire rod feeding device 10B of the present embodiment will be described with reference to FIG. 7. FIG. 7 shows a control configuration of the wire rod feeding device 10B. Specifically, the memory 101 of the controller 100 of the wire rod feeding device 10B stores a data table TB1 in which the wire rod data for specifying the thickness of the wire rod 90 and the position data of the first roller support portion 31 are associated with each other. ing. Then, when the wire rod data is input by the console 102 of the controller 100, the CPU 105 of the controller 100 functions as the position control unit 103, acquires the position data corresponding to the input wire rod data from the data table TB1, and commands the position. A value is generated and output to the servo amplifier 36A of the position adjustment servo motor 36. As a result, the distance between the pair of rollers 21 and 22 is automatically adjusted by simply inputting the wire rod data according to the thickness of the wire rod 90, and the trouble of replacing the wire rod 90 is reduced.

[Other Embodiments]
(1) The wire rod feeding devices 10 and 10A of the above-described embodiment are provided in the forming machine 11, but the wire rod feeding device of the spring forming machine for forming the wire rod into a coil spring has the same configuration as that of the above-described embodiment. May be applied.

(2) A pair of rollers 21 and 22 of the wire rod feeding devices 10 and 10A of the above embodiment may be used as a plurality of pairs of rollers. In this case, a plurality of rollers on one side of the wire rod feeding line L1 may be connected by a gear or a belt to rotate in conjunction with each other and be driven by a common servomotor, or the plurality of rollers may be driven by separate servomotors. It may be configured to be driven by. The same applies to the plurality of rollers on the other side of the wire rod feeding line L1.

(3) Further, only the roller on one side of the wire rod feeding line L1 may be driven by the servomotor, and the roller on the other side may rotate freely.

(4) Further, the rollers 21 and 22 on both sides of the wire rod feeding line L1 may be driven by a common servomotor. Specifically, in the wire rod feeding device 10 of the first embodiment, the first and second servomotors 51 and 52 are abolished, and a pair of intermediate gears having the same shape and meshing with each other are fed. Arrange symmetrically above and below the horizontal plane including the line L1, one of them is connected to the output shaft of the common servomotor described above. Then, the gear 41G of the first rotating shaft 41 is meshed with the lower intermediate gear, and the first roller support portion 31 is supported so as to rotate about the lower intermediate gear. Similarly, the gear 42G of the second rotating shaft 42 is meshed with the upper intermediate gear, and the second roller support portion 32 is supported so as to rotate about the upper intermediate gear. As a result, the rollers 21 and 22 on both sides of the wire rod feeding line L1 are driven by a common servomotor, and the first and second roller support portions 31 and 32 can move so as to approach and separate from each other.

(5) In the wire rod feeding devices 10 and 10A of the above embodiment, a pair of rollers 21 and 22 are arranged vertically, but even if a pair of rollers 21 and 22 are arranged horizontally or diagonally vertically and vertically. Good. Further, the entire wire rod feeding device 10 may be configured to rotate around the wire rod feeding line L1 together with the wire rod supporting protrusion 15.

(6) The position adjusting servomotor 36 of the wire rod feeding device 10 of the first embodiment is eliminated, and a bolt and a screw hole are provided instead of the ball screw 37 and the ball nut 38, and the bolt can be manually operated. It may be used as an adjustment bolt. By doing so, the wire rod feeding device can be manufactured at low cost.

(7) Although the rollers 21 and 22 of the above embodiment are provided with wire rod receiving grooves such as a V groove 85 and a square groove 86, the rollers 21 and 22 may not be provided with a wire rod receiving groove.

10, 10A, 10B Wire rod feeder 21, 22 Roller 31 1st roller support 32 2nd roller support 34 Guide rail (moving support mechanism)
35 slider (movement support mechanism)
36 Position adjustment servo motor 39 Air cylinder (urging device)
51 1st servo motor 52 2nd servo motor 61 Biasing servo motor (urging device)
75 Position adjustment device 90 Wire 103 Position control unit TB1 Data table

Claims (6)

In a wire rod feeding device that feeds by sandwiching a wire rod with a pair of rotating rollers
A first roller support portion that rotatably supports one of the rollers,
A second roller support portion that rotatably supports the other roller, and
A moving support mechanism that movably supports the first roller support portion and the second roller support portion so as to keep the rotation axes of the pair of rollers parallel to each other and approach and separate from each other.
A position adjusting device for positioning the first roller support portion at an arbitrary position, and
A wire rod feeding device including an urging device for urging the second roller support portion toward the first roller support portion. The wire rod feeding device according to claim 1, further comprising a first servomotor and a second servomotor that separately drive the pair of rollers. The rotation speed of the pair of rollers is made different according to the difference between the radius of gyration of the contact portion with the wire rod in one of the rollers and the radius of gyration of the contact portion with the wire rod in the other roller. The wire rod feeding device according to claim 2, further comprising a speed control unit that matches the peripheral speeds of both of the contact portions. The position adjusting device includes
A position adjustment servomotor that is a drive source for moving the first roller support, and
A data table in which the wire rod data for specifying the thickness of the wire rod and the position data of the first roller support portion are associated with each other.
When the wire rod data is given, the position control unit that positions and controls the first roller support unit with the position adjustment servomotor based on the corresponding position data, and the position control unit.
The wire rod feeding device according to any one of claims 1 to 3, wherein the wire rod feeding device is provided. The wire rod feeding device according to any one of claims 1 to 3, wherein the position adjusting device is provided with an adjusting bolt for manually adjusting the position of the first roller support portion. In the moving support mechanism, a slider fixed to the first roller support portion and the second roller support portion, and the slider of the first roller support portion and the second roller support portion slide in common. The wire rod feeding device according to any one of claims 1 to 5, further comprising a guide rail that can be engaged with each other.

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