JP2022078465A - Rod supply machine - Google Patents

Abstract

To provide a rod supply machine that is able to reduce driving resistance of a feed arrow and remarkably suppress vibration.SOLUTION: A guide unit has a plurality of segment guide rail elements arranged so as to extend in a line in a direction parallel to a longitudinal axis of a feed arrow. Between at least one pair of adjacent guide rail elements, a lower guide roller 131 is provided, which is rotated by a lower side surface of the feed arrow during feed of rods. A cross section of each segment guide rail element, which is a cross section perpendicular to the longitudinal axis of the feed arrow, has an arcuate portion having a first curvature-center and a first curvature-radius. The first curvature-center is on the longitudinal axis of the feed arrow.SELECTED DRAWING: Figure 8

Description

The present invention relates to a bar material feeder, and more particularly to a bar material feeder that feeds a bar material to a bar material processing machine along its longitudinal axis.

In general, a bar feeder receives a single bar from above and guides the received bar along the feed axis, and the bar received in the guide rail is used as a bar. In order to feed the rod to the processing machine, it has a feed arrow that pushes the bar material from the rear to the front toward the bar material processing machine, and a drive device that drives the feed arrow.

The bar material fed to the bar material processing machine passes through the through hole of the main shaft of the bar material processing machine, and the tip portion of the bar material is held by the chuck of the main shaft. By rotating the spindle, the tip portion of the bar can be machined by the machining section (for example, a bite) of the bar processing machine. After cutting the processed product formed by processing the tip portion of the rod material, the rod material is fed again by the feed arrow to form the next processed product and cut it.

The Applicant has obtained a patent for a bar feeder that allows the same feed arrow to be inserted into through holes of spindles with different hole diameters by using replaceable exterior pipes (Patent Document 1). ..

Patent No. 5998417

In the conventional bar material feeder including the device of Patent Document 1, the feed arrow is guided by the guide rail. The cross section of the guide rail perpendicular to the longitudinal axis of the feed arrow is formed in an arcuate cross section.

Then, in order to reduce the frictional resistance between the feed arrow and the guide rail, the radius of curvature of the arcuate cross section of the guide rail is formed to be larger than the radius of the feed arrow. More specifically, the radius of curvature of the arcuate cross section of the guide rail is formed to be about 2% larger than the radius of the sending arrow. Then, in the conventional device configuration, since the feed arrow is guided while being supported on the guide rail (at a position biased toward the guide rail), from the longitudinal axis of the feed arrow to the center of curvature of the arcuate cross section of the guide rail. The distance is about 2% of the radius of curvature of the arcuate cross section. For example, when the sending arrow is φ50 (radius 25 mm), the radius of curvature of the arcuate cross section of the guide rail is 25.5 mm. The distance from the longitudinal axis of the sending arrow to the center of curvature of the arcuate cross section of the guide rail is 0.5 mm (2% of the radius of curvature of the arcuate cross section).

In such an embodiment, the frictional resistance between the feed arrow and the guide rail is the limit gap that can be driven, but there is a problem that the feed arrow vibrates and generates noise.

The inventor of the present invention has been diligently studying this problem by providing a lower guide roller in the middle of the guide rail, which is rotated by the lower side surface of the feed arrow (rolls with respect to the lower side surface of the feed arrow). , It was found that the frictional resistance between the feed arrow and the guide rail can be significantly reduced. Furthermore, on the premise of this configuration, even if the distance from the longitudinal axis of the feed arrow to the center of curvature of the arcuate cross section of the guide rail is extremely small (ideally matched), the feed arrow can be driven. It was confirmed that there was no problem, and it was found that the vibration of the sending arrow can be remarkably suppressed by adopting such a dimensional relationship. (Regarding the radius of curvature of the arcuate cross section of the guide rail, some play may remain with respect to the radius of the feed arrow.)

The present invention has been devised based on the above findings. An object of the present invention is to provide a bar material feeder capable of reducing the driving resistance of the feed arrow and remarkably suppressing the vibration of the feed arrow.

The present invention is a bar material feeder that feeds a bar material to a bar material processing machine, and has a guide portion that guides the bar material in the axial direction of the bar material, and the bar material along the guide portion. It is provided with a feed arrow that pushes out the rear end portion of the bar so as to be fed to a material processing machine, and a drive device that drives the feed arrow, and the guide portion is provided in a direction parallel to the longitudinal axis of the feed arrow. It is arranged between a plurality of lower guide rail elements arranged so as to extend in a row and at least one set of adjacent lower guide rail elements, and is arranged on the lower side surface of the feed arrow when the bar material is fed. It has a lower guide roller that is rotated by, and the cross section of each lower guide rail element that is perpendicular to the longitudinal axis of the feeder is the first center of curvature and the first. It has an arcuate portion having a radius of curvature of, and the first center of curvature is on the longitudinal axis of the feeder or the first radius of curvature from the longitudinal axis of the rod. It is a bar material feeder characterized by being deviated by a distance of 1% or less.

According to the present invention, the frictional resistance between the feed arrow and the guide portion is significantly reduced by providing the lower guide roller that rotates by the lower side surface of the feed arrow (rolls with respect to the lower side surface of the feed arrow). Therefore, even if the distance from the longitudinal axis of the arrow to the center of curvature of the arcuate portion of the cross section of the guide rail element is reduced to a distance of 1% or less of the radius of curvature, the arrow is driven. On the other hand, by adopting such a dimensional relationship, the vibration of the feed arrow can be remarkably suppressed.

Preferably, the cross section that passes through the rotation axis of the lower guide roller and is perpendicular to the longitudinal axis of the feeder has an arcuate portion having a second center of curvature and a second radius of curvature. The second center of curvature is on the longitudinal axis of the feed arrow, or is offset from the longitudinal axis of the feed arrow by a distance of 1% or less of the second radius of curvature. The lower guide roller is positioned at the lower guide position.

According to this, due to the presence of the arcuate portion of the lower guide roller, when the feed arrow is sent out, the lower guide roller receives a rotational force (rolling force) in a wider contact area from the lower side surface of the feed arrow. As a result, the effect of reducing the frictional resistance between the feed arrow and the guide portion becomes extremely high.

Alternatively, the present invention is a bar material feeder that feeds the bar material to the bar material processing machine, and has a guide portion that guides the bar material in the axial direction of the bar material, and the bar material along the guide portion. The guide portion is provided with a feed arrow that pushes out the rear end portion of the bar material so as to send the bar material to the bar material processing machine, and a drive device that drives the feed arrow. It has a lower guide roller that is rotated by the lower side surface of the arrow, and the cross section that passes through the rotation axis of the lower guide roller and is perpendicular to the longitudinal axis of the feed arrow is the second cross section. It has an arcuate portion with a center of curvature and a second radius of curvature, the second center of curvature being on the longitudinal axis of the feed arrow, or from the longitudinal axis of the feed arrow. The bar material feeder is characterized in that the lower guide roller is positioned at a lower guide position that is deviated by a distance of 1% or less of the second radius of curvature.

According to the present invention, due to the presence of the arcuate portion of the lower guide roller, the lower guide roller receives a rotational force (rolling force) in a wider contact area from the lower side surface of the feed arrow when the feed arrow is sent out. As a result, the effect of reducing the frictional resistance between the feed arrow and the guide portion becomes extremely high. Therefore, even if the distance from the longitudinal axis of the sending arrow to the center of curvature of the arcuate portion is reduced to a distance of 1% or less of the radius of curvature, there is no problem in driving the sending arrow, but such a dimension. By adopting the relationship, the vibration of the sending arrow can be remarkably suppressed.

In each of the above inventions, it is more preferable that the lower guide roller is arranged so as to be retractable downward from the lower guide position.

According to this, when the lower guide roller is provided in the region where the bar can rotate for processing, the lower guide roller can be retracted when the bar rotates. This makes it possible to prevent undesired rotational resistance (resistance to rotation around the axis) from being applied to the bar by the lower guide roller.

Further, it is preferable that the guide portion further has an upper guide roller that is rotated by the upper side surface of the feed arrow when the rod material is fed.

In this case, when the feed arrow is sent out, the upper guide roller receives a rotational force (rolling force) from the upper side surface of the feed arrow and rolls. As a result, the effect of reducing the frictional resistance between the feed arrow and the guide portion is enhanced. ..

Further, in this case, preferably, the cross section that passes through the rotation axis of the upper guide roller and is perpendicular to the longitudinal axis of the feed arrow has a third center of curvature and a third radius of curvature. It has an arcuate portion, and the third center of curvature is on the longitudinal axis of the feed arrow, or is 1% or less of the third radius of curvature from the longitudinal axis of the feed arrow. The upper guide roller is positioned at the upper guide position that is deviated by a distance.

According to this, due to the presence of the arcuate portion of the upper guide roller, when the feed arrow is sent out, the upper guide roller receives a rotational force (rolling force) and rolls in a wider contact area from the upper side surface of the feed arrow. As a result, the effect of reducing the frictional resistance between the feed arrow and the guide portion becomes extremely high.

Further, in this case, it is more preferable that the upper guide roller is arranged so as to be retractable upward from the upper guide position.

According to this, when the upper guide roller is provided in the region where the bar can rotate for processing, the upper guide roller can be retracted when the bar rotates. This makes it possible to prevent undesired rotational resistance (resistance to rotation around the axis) from being applied to the bar by the upper guide roller.

Further, it is preferable that the upper guide rollers are arranged so as to form a pair above the corresponding lower guide rollers.

According to this, since the upper guide roller and the lower guide roller guide the feed arrow so as to sandwich the feed arrow, the vibration of the feed arrow can be further suppressed. Further, the control commands of the upper guide roller and the lower guide roller can be the same.

Further, in this case, it is preferable that the pair of the upper guide roller and the lower guide roller are arranged so that the distance between the upper guide roller and the lower guide roller can be changed.

According to this, it is possible to adjust the gripping force when the upper guide roller and the lower guide roller pinch the feed arrow.

Further, it is preferable that the guide portion is supported by the support frame via the vibration-proof rubber.

According to this, since the vibration generated in the guide portion is prevented from being transmitted to the support frame, the generation of noise can be remarkably suppressed.

It is a front view of the bar material supply system including the bar material supply machine of one Embodiment of this invention. It is sectional drawing of a feed arrow and a division guide rail element. It is a side view of a hook and a hook drive mechanism. FIG. 4A is an exploded plan view of the slider and the feed arrow, and FIG. 4B is an exploded front view of the slider and the feed arrow. It is a schematic plan view of the bar material feeder which shows the method of supplying a bar material. It is a schematic plan view of a guide part and a feed arrow. It is a schematic side sectional view of the lower guide roller and the upper guide roller of a fixed type. FIG. 7 is a view taken along the line CC of FIG. 7. It is a schematic side sectional view of the lower guide roller and the upper guide roller of a retractable type. FIG. 9 is a view taken along the line DD of FIG. It is a schematic side sectional view in the retracted state of the lower guide roller and the upper guide roller of a retractable type. FIG. 11 is a view taken along the line EE of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(overall structure)
The bar processing system 1 shown in FIG. 1 is arranged on a bar processing machine 10 (for example, an NC lathe) for processing the bar B and an upstream side (also referred to as a rear side) of the bar processing machine 10. It has a bar material feeder 20 that feeds B to the bar material processing machine 10 along a feed axis 21 that coincides with the longitudinal axis B1. The bar material feeder 20 is an embodiment of the present invention.

The bar processing machine 10 generally has a spindle 12 that rotates about the rotation axis 11 and a processing portion 13 (for example, a bite), and the spindle 12 has a through hole 14 along the rotation axis 11. It has a chuck 15 (for example, a collet chuck) that can releaseably grip the vicinity of the front end portion Bb of the bar member B passed through the through hole 14. While rotating the bar B gripped by the spindle 12, the bar B is cut by the machining section 13 by moving the spindle 12 (spindle moving type) or moving the machining section 13 (spindle fixed type). It is possible to do. When the bar B is long, the bar B gripped by the chuck 15 of the spindle 12 extends through the through hole 14 into the bar supply machine 20 on the upstream side (rear side).

The bar material feeder 20 of the present embodiment has a support frame 22, a guide unit 30 that receives one bar material B from above, and guides the received bar material B along the feeding axis 21, and a guide unit 30. A material shelf (not shown) arranged adjacent to the bar and waiting for the bar B, and a rear end portion Ba (see FIG. 1) of the bar B in the guide portion 30 are supported by the bar processing machine 10 toward the support frame. It has a slider 40 that pushes the bar to approximately the center of 22 and a feed arrow 50 that feeds the bar B to the bar processing machine 10 by subsequently pushing the rear end portion Ba of the bar B in the guide portion 30. (See Fig. 5).

The slider 40 is for pushing the rear end portion Ba of the bar material B received in the guide portion 30 forward until the front end portion Bb of the bar material B does not reach the chuck 15 of the bar material processing machine 10. .. The feed arrow 50 is for pushing the rear end portion Ba of the bar B pushed by the slider 40 further forward until the front end portion Bb of the bar B reaches the chuck 15 of the bar processing machine 10. be. The rear end portion Ba of the bar B preferably has a reduced diameter portion B2 (see FIG. 1).

Further, the bar material feeder 20 is a clamp device 60 arranged in the middle of the support frame 22 in the direction of the feed axis 21 and capable of gripping the bar material B, and a vibration arranged between the main shaft 12 and the guide portion 30. It has a stop device (not shown).

(Guide unit 30: Division guide rail element 31)
The guide portion 30 has a plurality of division guide rail elements 31 arranged so as to extend in a line in a direction parallel to the longitudinal axis (feeding axis 21) of the feed arrow 50 (see FIG. 5). .. More specifically, it has 14 division guide rail elements 31a to 31n (see FIG. 6E). Each of the division guide rail elements 31a to 31n is made of, for example, a urethane rail material. Further, each of the division guide rail elements 31a to 31n (for example, urethane material) is formed by the left and right side walls 33 and 34 (for example, steel material) extending over substantially the entire length of the guide portion 30 via the bottom support plate (for example, steel material). (See FIG. 6 (e)), which are integrally supported.

In the present embodiment, the lower surface of each of the division guide rail elements 31a to 31n constitutes the lower guide rail element. However, a plurality of divided lower guide rail elements may be provided by integrally forming the guide rail and partially and discretely cutting out the lower side surface thereof.

The left and right side walls 33 and 34 supporting the division guide rail elements 31a to 31n are located at four locations (see FIG. 6E), and the hollow square columnar main frame 24 (see FIG. 8) (each of which is approximately each guide rail). A plurality of elements having the same length as the elements are arranged side by side in a row at appropriate intervals), and have an L-shaped cross section fixed to both side walls of the main frame 24 so as to form a pair on the left and right. A shelf member 25 (see FIGS. 6 (e) and 8), an anti-vibration rubber 26 arranged on each shelf member 25 (see FIGS. 6 (e) and 8), and a pair of anti-vibration rubber 26. It is fixed to the support frame 22 via a strip-shaped rail frame 28 (see FIGS. 6 (e) and 8) passed between them.

Further, as shown in FIG. 2, the cross section of each division guide rail element 31 and perpendicular to the longitudinal axis of the feeder 50 is a circle having a first center of curvature and a first radius of curvature. It has a semi-circular portion 32 as an example of an arcuate portion. In the present embodiment, the center of curvature (first center of curvature) of the semicircular portion 32 is on the longitudinal axis of the feed arrow 50. (The first radius of curvature (for example, φ52 to φ54) substantially coincides with the radius of the feed arrow 50 (for example, φ51).) Further, in the present embodiment, as will be described later, with each division guide rail element 31. The upper guide rail element 37 is provided vertically symmetrically. The cross section of each upper section guide rail element 37, the cross section perpendicular to the longitudinal axis of the feeder 50, is also a semicircle as an example of an arcuate portion having a first center of curvature and a first radius of curvature. Has a part.

(Clamp device)
Further, the clamp device is arranged as a device for gripping the bar B from both sides in the vertical direction. Specifically, a pair of grippers arranged on both upper and lower sides of the bar B and guided and movable in the vertical direction for gripping the bar B, and an air cylinder for driving the pair of grippers (shown in the figure). Do not have). Thus, by activating the clamping device, it is possible to operate an air cylinder (not shown) to move a pair of grippers between the open and closed positions.

The anti-vibration device (not shown) is a device that regulates the runout of the bar B or the feed arrow 50 when the bar B is rotated by the spindle 12. The anti-vibration device is of any conventional type, and detailed description thereof will be omitted.

(Hook 80)
As shown in FIG. 3, the bar feeder 20 has a hook 80 for lifting the feed arrow 50. The hook 80 can be moved between the upper position 80a and the lower position 80b by the hook drive mechanism 90. Specifically, the hook drive mechanism 90 includes a drive shaft 93 that can be pivotally driven around a pivot axis 92 by an air cylinder 91a and an arm 91b, and an arm 94 that connects the drive shaft 93 and the hook 80. ing. Thus, by activating the hook drive mechanism 90, the hook 80 can be moved between the upper position 80a and the lower position 80b. The hook 80 is preferably detachably connected to the arm 94 by a screw 96 or the like.

(Slider 40)
As shown in FIG. 4, the slider 40 has a substantially cylindrical slider main body 41 and a blade member 42 extending laterally from the slider main body 41. The slider main body 41 has a connecting portion 43 that can be connected to the rear end portion 50a of the feed arrow 50. Specifically, the connecting portion 43 of the slider 40 has an end face 44, a groove 45 that penetrates laterally and opens upward on the upstream side of the end face 44, and a protrusion formed between the end face 44 and the groove 45. It has a 46 and a groove 47 provided in the protrusion 46.

The slider 40 can be moved in the feed axis 21 direction by a slider drive mechanism (not shown) that drives the blade member 42. The slider drive mechanism includes, for example, a chain connected to the blade member 42, a sprocket arranged at the upstream and downstream ends of the support frame 22 and around which the chain is wound, and a servomotor for driving the sprocket. have. The slider 40 is movable in the division guide rail element 31, and can be moved to, for example, a retracted position 40a (see FIG. 5A) and a forward position 40b (see FIG. 5D). ..

(Send arrow 50)
As shown in FIG. 4, the feed arrow 50 has an elongated rod-shaped feed arrow main body 51 including a rear end portion 50a of the feed arrow 50, and a finger chuck 52 including a front end portion 50b of the feed arrow 50. .. The finger chuck 52 is rotatably and removablely attached to the feed arrow main body 51, and has a hole 53 for receiving the reduced diameter portion B2 of the rear end portion Ba of the rod material B.

The rear end portion 50a of the feed arrow 50 has a connecting portion 54 that can be connected to the connecting portion 43 of the slider 40. Specifically, the connecting portion 54 of the feed arrow 50 is formed on a protrusion 55 that can be fitted into the groove 45 of the slider 40, a groove 56 that can be fitted into the protrusion 46 of the slider 40, and an end surface 44 of the slider 40. It has a contact surface 57 that comes into contact with the slider 40, and a protrusion 58 that can be fitted into the groove 47 of the slider 40.

The feed arrow main body 51 has a core element 100 extending along the feed axis 21, and a plurality of exterior pipes 110, 111, 112 arranged around the core element 100. The plurality of exterior pipes 110, 111, 112 are arranged side by side along the feeding axis 21. Further, the exterior pipes 110, 111, 112 are arranged over substantially the entire length of the feed arrow main body 51. The core element 100 has a front end member 101, a rear end member 102, and a hollow tube 103 arranged between the front end member 101 and the rear end member 102.

The front end member 101 has a first portion 101a having an outer diameter that fits into the hollow tube 103, and an outer diameter that is located on the front side of the first portion 101a and is larger than the outer diameter of the first portion 101a. It has a second portion 101b and a third portion 101c that is located on the front side of the second portion 101b and has an outer diameter larger than the outer diameter of the second portion 101b. The length of the third portion 101c should be short.

The rear end member 102 has an outer diameter of a first portion 102a having an outer diameter that fits into the hollow tube 103, and an outer diameter that is located behind the first portion 102a and is larger than the outer diameter of the first portion 102a. It has a second portion 102b and the like. The second portion 102b includes the connection portion 54 described above, but the length thereof is preferably short.

The plurality of exterior pipes 110, 111, 112 include a first exterior pipe 110 arranged around the second portion 101b of the front end member 101, and a plurality of second exterior pipes arranged around the hollow pipe 103. It is composed of a pipe 111 and a third exterior pipe 112 arranged around the hollow pipe 103 and located at the rearmost side.

The hollow tube 103 and the first portion 101a of the front end member 101 are connected by a pin 104 extending diametrically through them. The pin 104 has a length that does not protrude from the hollow tube 103. The hollow tube 103 and the first portion 102a of the rear end member 102 are screws that penetrate the hollow tube 103 and the third exterior pipe 112 in the radial direction and are screwed into the first portion 102a of the rear end member 102. Combined by 105. It is preferable that the first outer tube 110 and the second outer tube 111 are rotatable with respect to the core element 100.

The outer diameter of the first outer diameter pipe 110 and the outer diameter of the second outer diameter pipe 111 are preferably the first outer diameter D1. Further, it is preferable that the outer diameter of the second portion 102b of the third outer tube 112 and the rear end member 102 is also the first outer diameter D1. It is preferable that the outer diameter of the third portion 101c of the front end member 101 and the outer diameter of the finger chuck 52 are the same as or smaller than the first outer diameter D1.

(Overview of overall operation)
Here, with reference to FIG. 5, the operation of the bar material feeder 20 in the normal mode when the bar material B is fed from the division guide rail element 31 to the bar material processing machine 10 will be described.

In the state shown in FIG. 5A, the slider 40 is in the retracted position 40a by the slider drive mechanism. The hook 80 is located at the lower position 80b by the hook drive mechanism 90, and thus the slider 40 and the feed arrow 50 are connected to each other via the connecting portions 43 and 54. Further, the gripper 61 of the clamp device 60 is in the open position 61a.

Next, as shown in FIG. 5B, the hook 80 is moved from the lower position 80b to the upper position 80a by the hook drive mechanism 90, so that the feed arrow 50 is retracted from the division guide rail element 31 (see FIG. 3). ..

Next, as shown in FIG. 5 (c), the bar B is supplied from the material shelf onto the division guide rail element 31. The mechanism for supplying the bar B from the material shelf onto the division guide rail element 31 may be a conventional mechanism, and the description thereof will be omitted.

Next, as shown in FIG. 5D, by moving the slider 40 to the forward position 40b by the slider drive mechanism, the rear end portion Ba of the bar B is pushed, and the rear end portion Ba is clamped by the gripper 61 of the clamp device 60. Move to the vicinity of. (During the operation, depending on the mass and diameter of the bar B, the lower roller device or the like (described later) is retracted to control the frictional resistance.) The front end portion Bb of the bar B is the bar processing machine 10. It is fed into the through hole 14 of the spindle 12.

Then, as shown in FIG. 5 (e), the slider 40 is returned to the retracted position 40a by the slider drive mechanism. Further, the hook 80 is moved from the upper position 90a to the lower position 90b by the hook drive mechanism 90, whereby the feed arrow 50 is arranged in the division guide rail element 31 and the rear end portion 50a of the feed arrow 50 is connected. It is connected to the slider 40 via the portions 43 and 54.

Next, as shown in FIG. 5 (f), the clamp device 60 is operated to move the pair of grippers 61 from the open position 61a to the closed position 61b to sandwich the bar B, and the bar B sandwiches the bar B. Do not move to. In that state, the slider drive mechanism is operated to advance the slider 40 and the feed arrow 50 together, and the hole 53 of the finger chuck 52 is engaged with and fixed to the reduced diameter portion B2 of the rear end portion Ba of the rod member B. ..

The clamp device 60 is then activated to move the pair of grippers 61 from the closed position 61b to the open position 61a. Then, the slider drive mechanism is operated to advance the slider 40 and the feed arrow 50 together, thereby advancing the rod B. When the front end portion Bb of the bar B reaches a predetermined position in the spindle 12, the bar B is stopped.

When the processing of the front end portion Bb of the bar member B is completed, the slider drive mechanism is operated again to advance the slider 40, the feed arrow 50, and the bar member B. When the length of the rod B becomes shorter than the length of the main shaft, the feed arrow 50 enters the through hole 14 of the main shaft 12. When a predetermined number of machining of the bar member B is completed, the slider drive mechanism is operated to retract the slider 40 and the feed arrow 50, so that the slider 40 is returned to the retracted position 40a together with the feed arrow 50.

(Guide unit 30: fixed type lower guide roller device 130 and upper guide roller device 140)
Next, the details of the guide unit 30 will be described with reference to FIG. As described above, the guide portion 30 of the bar material feeder 20 of the present embodiment has the division guide rail elements 31a to 31n divided into 14 pieces.

Then, as shown in FIG. 6E, between the adjacent division guide rail elements 31a and 31b, between the adjacent division guide rail elements 31c and 31d, and between the adjacent division guide rail elements 31e and 31f. A fixed lower guide roller device 130 having a lower guide roller 131 that is rotated by the lower side surface of the feed arrow 50 when the bar B is sent out is provided. The material of the lower guide roller 131 is not particularly limited, and may be made of steel or resin.

Further, in the present embodiment, the fixed type upper guide roller device 140 is provided so as to form a pair above each fixed type lower guide roller device 130. Each upper guide roller device 140 has an upper guide roller 141 that is rotated by an upper side surface of the feed arrow 50 when the bar B is fed. The material of the upper guide roller 141 is also not particularly limited, and may be made of steel or resin.

FIG. 7 is a schematic side sectional view of the fixed type lower guide roller 131 and upper guide roller 141. Further, FIG. 8 is a view taken along the line CC of FIG. 7.

As shown in FIGS. 7 and 8, the lower guide roller 131 is rotatably provided around the rotation shaft 132 with respect to the support wall portions 134 and 135 of the lower guide roller device 130 by a pair of left and right bearings 133. ing. The rotation shaft 132 is arranged horizontally in a plane perpendicular to the longitudinal axis of the feed arrow 50.

The lower guide roller 131 of the present embodiment has a cross section that passes through the rotation axis 132 of the lower guide roller 131 and is perpendicular to the longitudinal axis of the feeder 50 (that is, shown in FIG. 8). The cross section) has an arcuate portion (about a quarter arc) having a second center of curvature and a second radius of curvature. The center of curvature (second center of curvature) of the arcuate portion is on the longitudinal axis of the feed arrow 50. (That is, the second radius of curvature coincides with the radius of the feed arrow 50.)

Further, the lower guide roller device 130 further has a left side guide 136 and a right side guide 137. The left side guide 136 and the right side guide 137 are formed along a part of a cylindrical surface having the longitudinal axis of the feed arrow 50 as the axis and the second radius of curvature as the radius.

The upper guide roller 141 is provided substantially vertically symmetrically by a pair of left and right bearings 143 so as to be rotatable around a rotation shaft 142 with respect to the support wall portions 144 and 145 of the upper guide roller device 140. The rotation axis 142 is arranged horizontally in a plane perpendicular to the longitudinal axis of the feed arrow 50.

The upper guide roller 141 of the present embodiment is a cross section that passes through the rotation axis 142 of the upper guide roller 141 and is a cross section perpendicular to the longitudinal axis of the feeder 50 (that is, the cross section shown in FIG. 8). The surface) has an arcuate portion (about a quarter arc) having a third center of curvature and a third radius of curvature. The center of curvature (third center of curvature) of the arcuate portion is on the longitudinal axis of the feed arrow 50. (That is, the third radius of curvature coincides with the radius of the feed arrow 50.)

Further, the upper guide roller device 140 also has a left side guide 146 and a right side guide 147. The left side guide 146 and the right side guide 147 are formed along a part of a cylindrical surface having the longitudinal axis of the feed arrow 50 as the axis and the third radius of curvature as the radius.

The lower guide roller device 130 is fixed to the support frame 22 via the main frame 24, the shelf member 25, the anti-vibration rubber 26, and the rail frame 28.

The upper guide roller device 140 can be moved between the upper position and the lower position by the upper guide roller drive mechanism 150. The upper guide roller drive mechanism 150 is commonly provided in the three upper guide roller devices 140 in the present embodiment (the three upper guide roller devices 140 are fixed to the common upper frame), specifically. It has a drive shaft 153 that can be pivotally driven around a pivot axis 152 by an air cylinder 151, and an arm 154 that connects the drive shaft 153 and the upper guide roller device 140. Thus, by activating the upper guide roller drive mechanism 150, it is possible to move the upper guide roller device 140 between the upper position and the lower position.

In the present embodiment, in the upper frame to which the three upper guide roller devices 140 are fixed, the six upper division guides are arranged so as to be vertically symmetrical with each of the six division guide rail elements 31a to 31f. Rail elements 37 (37a to 37f) are provided (see FIG. 2).

(Guide unit 30: retractable lower guide roller device 230 and upper guide roller device 240)
Further, as shown in FIG. 6E, between the adjacent division guide rail elements 31h and 31i, between the adjacent division guide rail elements 31j and 31k, and between the adjacent division guide rail elements 31l and 31m. A retractable lower guide roller device 230 having a lower guide roller 231 that is rotated by the lower side surface of the feed arrow 50 when the bar B is sent out is provided. The material of the lower guide roller 231 is also not particularly limited, and may be made of steel or resin.

Further, in the present embodiment, the retractable upper guide roller device 240 is provided so as to form a pair above each retractable lower guide roller device 230. Each upper guide roller device 240 has an upper guide roller 241 that is rotated by the upper side surface of the feed arrow 50 when the rod member B is fed. The material of the upper guide roller 241 is also not particularly limited, and may be made of steel or resin.

FIG. 9 is a schematic side sectional view of the retractable lower guide roller 231 and the upper guide roller 241. Further, FIG. 10 is a view taken along the line DD of 9. 11 is a schematic side sectional view of the retractable lower guide roller 231 and the upper guide roller 241 in the retracted state, and FIG. 12 is a view taken along the line EE of FIG.

As shown in FIGS. 9 and 10, the lower guide roller 231 is also rotatably provided around the rotation shaft 232 with respect to the support wall portions 234 and 235 of the lower guide roller device 230 by the pair of left and right bearings 233. ing. The rotation shaft 232 is arranged horizontally in a plane perpendicular to the longitudinal axis of the feed arrow 50.

The lower guide roller 231 of the present embodiment is a cross section that passes through the rotation axis 232 of the lower guide roller 231 and is a cross section perpendicular to the longitudinal axis of the feeder 50 (that is, shown in FIG. 10). The cross section) has an arcuate portion (about a quarter arc) having a second center of curvature and a second radius of curvature. The center of curvature (second center of curvature) of the arcuate portion is on the longitudinal axis of the feed arrow 50. (That is, the second radius of curvature coincides with the radius of the feed arrow 50.)

Further, the lower guide roller device 230 further has a left side guide 236 and a right side guide 237. The left side guide 236 and the right side guide 237 are formed along a part of a cylindrical surface having the longitudinal axis of the feed arrow 50 as the axis and the second radius of curvature as the radius.

Further, the retractable lower guide roller device 230 further has a pair of left and right bearings 233 and a pair of left and right support walls with respect to the left side guide 236 and the right side guide 237 (which do not move with respect to the rail frame 28). It has an elevating cylinder 239 capable of retracting the movable portion 238 including the lower guide roller 231 with the portions 234 and 235 to the lower side (the main body portion of the elevating cylinder 239 is also relative to the rail frame 28). Does not move) (see FIGS. 11 and 12).

The upper guide roller 241 is also provided substantially vertically symmetrically by a pair of left and right bearings 243 so as to be rotatable around a rotation shaft 242 with respect to the support wall portions 244 and 245 of the upper guide roller device 240. The rotation shaft 242 is arranged horizontally in a plane perpendicular to the longitudinal axis of the feed arrow 50.

The upper guide roller 241 of the present embodiment is a cross section that passes through the rotation shaft 242 of the upper guide roller 241 and is a cross section perpendicular to the longitudinal axis of the feeder 50 (that is, the cross section shown in FIG. 10). The surface) has an arcuate portion (about a quarter arc) having a third center of curvature and a third radius of curvature. The center of curvature (third center of curvature) of the arcuate portion is on the longitudinal axis of the feed arrow 50. (That is, the third radius of curvature coincides with the radius of the feed arrow 50.)

Further, the upper guide roller device 240 also has a left side guide 246 and a right side guide 247. The left side guide 246 and the right side guide 247 are formed along a part of a cylindrical surface having the longitudinal axis of the feed arrow 50 as the axis and the third radius of curvature as the radius.

Further, the retractable upper guide roller device 240 further has a pair of left and right bearings 243 and a pair of left and right support wall portions with respect to the left side guide 246 and the right side guide 247 (these do not move with respect to the rail frame 28). It has an elevating cylinder 249 capable of retracting the movable portion 248 including the upper guide roller 241 with 244 and 245 to the upper side (the main body portion of the elevating cylinder 249 also does not move with respect to the rail frame 28). ) (See FIGS. 11 and 12).

The retractable lower guide roller device 230 is also fixed to the support frame 22 via the main frame 24, the shelf member 25, the anti-vibration rubber 26, and the rail frame 28.

The retractable upper guide roller device 240 can also be moved between the upper position and the lower position by the upper guide roller drive mechanism 250. The upper guide roller drive mechanism 250 is commonly provided in the three upper guide roller devices 240 in the present embodiment (the three upper guide roller devices 140 are fixed to the common upper frame), specifically. It has a drive shaft 253 that can be pivotally driven around a pivot axis 252 by an air cylinder 251 and an arm 254 that connects the drive shaft 253 and the upper guide roller device 240. Thus, by activating the upper guide roller drive mechanism 250, it is possible to move the upper guide roller device 240 between the upper position and the lower position.

The upper guide roller drive mechanism 250 can also have the function of the hook drive mechanism 90 described with reference to FIG. 3, in which case it is not necessary to independently provide the hook drive mechanism 90.

Further, in the present embodiment, in the upper frame to which the three upper guide roller devices 240 are fixed, the eight upper division guides are arranged so as to be vertically symmetrical with each of the eight division guide rail elements 31g to 31n. A rail element 37 (37 g to 37n) is provided (see FIG. 2).

(Example of evacuation operation)
The region in front of the clamp device 60 of the guide portion 30 of the present embodiment (on the spindle side) may have a function of rotatably supporting the rear portion of the bar B whose tip portion is being machined. The retractable lower guide roller device 230 and the upper guide roller device 240 of the present embodiment are in such a region.

However, the retractable lower guide roller device 230 and the upper guide roller device 240 can retract the lower guide roller 231 downward by operating the elevating cylinders 239 and 249, and the upper guide roller 241 can be retracted. Can be retracted upward. As a result, it is possible to prevent the bar member B from being subjected to undesired rotational resistance (resistance to rotation around the axis) by the lower guide roller 231 and the upper guide roller 241.

Specifically, after the rod B is shortened as shown in FIG. 6D, the retractable lower guide roller device 230 and the upper side are also in the region in front of the clamp device 60 (main shaft side). The guide roller device 240 guides the feed arrow 50. In this state, it is not necessary to retract the lower guide roller 231 and the upper guide roller 241.

On the contrary, when the bar B is sufficiently long as shown in FIG. 6A, the elevating cylinders 239 and 249 are operated in all of the three pairs of retractable lower guide roller devices 230 and upper guide roller devices 240. It is preferable to retract all the lower guide rollers 231 and the upper guide rollers 241.

When the bar B has a length as shown in FIG. 6B, the elevating cylinders 239 and 249 are operated in the two pairs of retractable lower guide roller devices 230 and upper guide roller devices 240 on the tip side. The two pairs of lower guide rollers 231 and upper guide rollers 241 are retracted, and only the remaining pair of retractable lower guide roller devices 230 and upper guide roller devices 240 are not retracted. It is preferable to keep it in a state.

When the bar B has a length as shown in FIG. 6 (c), the elevating cylinders 239 and 249 are operated in the pair of retractable lower guide roller devices 230 and upper guide roller devices 240 on the tip side. The pair of lower guide rollers 231 and upper guide rollers 241 are retracted, and the other two pairs of retractable lower guide roller devices 230 and upper guide roller devices 240 are not retracted. It is preferable to keep it in a state.

The operation of the elevating cylinders 239 and 249 in the retractable lower guide roller device 230 and the upper guide roller device 240 with respect to the change in the length of the bar B from FIGS. 6 (a) to 6 (d) is, for example, a finger. It is preferable that the control is performed based on the position information of the chuck 52 (for example, the detection information that the finger chuck 52 has passed the lower guide roller device 230 and the upper guide roller device 240 forward / rearward).

(Example of fine adjustment of gripping force)
In this embodiment, the distance between the upper guide roller 241 and the lower guide roller 231 can be changed by adjusting the control of the elevating cylinder 239 and 249 (for example, by using a pressure reducing valve together). It has become. Thereby, the gripping force when the upper guide roller 241 and the lower guide roller 231 sandwich the feed arrow 50 can be adjusted.

(effect)
According to the bar material feeder 20 of the present embodiment as described above, by providing the lower guide rollers 131 and 231 that rotate by the lower side surface of the feed arrow 50 (roll with respect to the lower side surface of the feed arrow 50). , The frictional resistance between the arrow 50 and the guide portion 30 can be significantly reduced, and thus from the longitudinal axis of the arrow 50 to the center of curvature of the arcuate portion of the cross section of the dividing guide rail element 31. Although the distance is reduced to almost 0, there is no problem in driving the feed arrow 50, and on the other hand, by adopting such a dimensional relationship, the vibration of the feed arrow 50 can be remarkably suppressed.

In particular, in the present embodiment, the cross section of the lower guide rollers 131 and 231 passing through the rotating shafts 132 and 232 and perpendicular to the longitudinal axis of the feeder 50 (see FIGS. 8 and 10). The lower guide is located at the lower guide position where it has an arcuate portion with a second center of curvature and a second radius of curvature, and the second center of curvature is on the longitudinal axis of the feeder 50. The rollers 131 and 231 are positioned.

Due to the presence of the arcuate portion of the lower guide rollers 131 and 231, when the feed arrow 50 is fed, the lower guide rollers 131 and 231 rotate (roll) in a wider contact area from the lower side surface of the feed arrow 50. Since it rolls under the force), as a result, the effect of reducing the frictional resistance between the feed arrow 50 and the guide portion 30 becomes extremely high. Although the distance from the longitudinal axis of the feed arrow 50 to the center of curvature of the arcuate portion is reduced to almost 0, there is no problem in driving the feed arrow 50, while such dimensions are obtained. By adopting the relationship, the vibration of the feed arrow 50 can be remarkably suppressed.

Further, in the present embodiment, the three lower guide rollers 231 in the region where the bar B can rotate for processing are arranged so as to be retractable downward from the lower guide position.

As a result, when the bar B rotates, the lower guide roller 231 can be retracted. This makes it possible to prevent the bar member B from being subjected to undesired rotational resistance (resistance to rotation around the axis) due to the lower guide roller 231.

Further, in the present embodiment, the upper guide rollers 141 and 241 that are rotated by the upper side surface of the feed arrow 50 when the rod member B is fed are further provided.

As a result, when the feed arrow 50 is fed, the upper guide rollers 141 and 241 receive rotational force (rolling force) from the upper side surface of the feed arrow 50 and roll, resulting in frictional resistance between the feed arrow and the guide portion. Increase the mitigation effect of.

Further, in the present embodiment, the cross section of the upper guide rollers 141 and 241 passing through the rotation shafts 142 and 242 and perpendicular to the longitudinal axis of the feeder 50 (FIGS. 8 and 10) is the third cross section. The upper guide rollers 141, 241 have an arcuate portion having a center of curvature and a third radius of curvature, and the third center of curvature is on the longitudinal axis of the feeder 50. Is positioned.

Due to the presence of such arcuate portions of the upper guide rollers 141 and 241, when the feed arrow 50 is fed, the upper guide rollers 141 and 241 have a rotational force (rolling force) in a wider contact area from the upper side surface of the feed arrow 50. As a result, the effect of reducing the frictional resistance between the feed arrow 50 and the guide portion 30 is extremely high.

Further, in the present embodiment, the three upper guide rollers 241 in the region where the bar B can rotate for processing are arranged so as to be retractable upward from the upper guide position.

As a result, when the bar B rotates, the upper guide roller 241 can be retracted. This makes it possible to prevent the bar member B from being subjected to undesired rotational resistance (resistance to rotation around the axis) due to the upper guide roller 241.

Further, in the present embodiment, the upper guide rollers 141 and 241 are arranged so as to form a pair above the corresponding lower guide rollers 131 and 231. As a result, the upper guide rollers 141 and 241 and the lower guide rollers 131 and 231 guide the feed arrow 50 so as to sandwich the feed arrow 50, so that the vibration of the feed arrow 50 can be further suppressed.

Further, in the present embodiment, the distance between the upper guide roller 241 and the lower guide roller 231 can be changed. Thereby, the gripping force when the upper guide roller 241 and the lower guide roller 231 sandwich the feed arrow 50 can be adjusted.

Further, in the present embodiment, the guide portion 30 is supported by the support frame 22 via the anti-vibration rubber 26. As a result, the vibration generated in the guide portion 30 is prevented from being transmitted to the support frame 22, and the generation of noise can be remarkably suppressed.

(Modification example)
In the above embodiment, the first center of curvature of the arcuate cross section of the division guide rail element 31 coincides with the longitudinal axis of the feed arrow 50, but the distance between the two coincides with that of the division guide rail element 31. When it is 1% or less (more preferably 0.5% or less) of the first radius of curvature of the arcuate cross section, the effect of reducing the vibration generation of the feed arrow 50 can be sufficiently obtained.

Further, in the above embodiment, the second center of curvature of the arcuate cross section of the lower guide rollers 131 and 231 coincides with the longitudinal axis of the feeder 50, but the distance between the two is lower. If it is 1% or less (more preferably 0.5% or less) of the second radius of curvature of the arcuate cross section of the guide rollers 131 and 231, the effect of reducing the vibration generation of the feeder 50 can be sufficiently obtained. ..

Further, in the above embodiment, the third center of curvature of the arcuate cross section of the upper guide rollers 141 and 241 coincides with the longitudinal axis of the feeder 50, but the distance between the two is the upper guide roller. When it is 1% or less (more preferably 0.5% or less) of the third radius of curvature of the arcuate cross section of 141 and 241, the effect of reducing the vibration generation of the feed arrow 50 can be sufficiently obtained.

1 Bar processing system 10 Bar processing machine 11 Rotating axis 12 Main shaft 13 Machining part 14 Through hole 15 Chuck 20 Bar material feeder 21 Feeding axis 22 Support frame 24 Main frame 25 Shelf member 26 Anti-vibration rubber 28 Rail frame 30 Guide Section 31 Sectional Guide Rail Elements (Provides Lower Guide Rail Elements)
31a to 31n Division guide rail element 32 Semi-circular portion 33 Left side wall 34 Right side wall 37 Upper division guide rail element 40 Slider 40a Backward position 40b Forward position 41 Slider body 42 Blade member 43 Connecting part 44 End face 45 Groove 46 Protrusion part 47 Groove 50 Feed arrow 50a Rear end part 50b Front end part 51 Feed arrow body 52 Finger chuck 53 Hole 54 Connection part 55 Protrusion part 56 Groove 57 Contact surface 58 Protrusion part 60 Clamping device 61 Gripper 61a Open position 61b Closed position 80 Hook 80a Upper position 80b Lower position 90 Hook drive mechanism 90a Upper position 90b Lower position 91a Air cylinder 91b Arm 92 Pivot axis 93 Drive shaft 94 Arm 96 Screw 100 Core element 101 Front end member 101a First part 101b Second part 101c Third part 102 Rear end member 102a First part 102b Second part 103 Hollow tube 104 Pin 105 Screw 110 First exterior tube 111 Second exterior tube 112 Third exterior tube 130 Lower guide roller device 131 Lower guide roller 132 Rotating shaft 133 Bearing 134 Support wall 135 Support wall 136 Left guide 137 Right guide 140 Upper guide roller device 141 Upper guide roller 142 Rotating shaft 143 Bearing 144 Support wall 145 Support wall 146 Left guide 147 Right guide 150 Upper guide Roller drive mechanism 151 Air cylinder 152 Pivot axis 153 Drive shaft 154 Arm 230 Lower guide roller device 231 Lower guide roller 232 Rotating shaft 233 Bearing 234 Support wall part 235 Support wall part 236 Left side guide 237 Right side guide 238 Moving part 239 Elevating part Cylinder 240 Upper guide roller device 241 Upper guide roller 242 Rotating shaft 243 Bearing 244 Support wall part 245 Support wall part 246 Left side guide 247 Right side guide 248 Moving part 249 Elevating cylinder 250 Upper guide roller drive mechanism 251 Air cylinder 252 Pivot axis 253 Drive Shaft 254 Arm B Bar B1 Longitudinal axis B2 Reduced diameter part Ba Rear end part Bb Front end part

Claims (10)

It is a bar material supply machine that feeds bar material to a bar material processing machine.
A guide section that guides the bar in the axial direction of the bar, and
A feed arrow that pushes out the rear end portion of the bar material so as to send the bar material to the bar material processing machine along the guide portion.
The drive device that drives the feed arrow and
Equipped with
The guide portion is
A plurality of lower guide rail elements arranged so as to extend in a line in a direction parallel to the longitudinal axis of the feed arrow, and
A lower guide roller located between at least one set of adjacent lower guide rail elements and rotated by the lower side surface of the feed arrow during delivery of the bar.
Have and
The cross section of each lower guide rail element, perpendicular to the longitudinal axis of the feeder, has an arcuate portion with a first center of curvature and a first radius of curvature.
The first center of curvature is on the longitudinal axis of the feed arrow or is deviated from the longitudinal axis of the feed arrow by a distance of 1% or less of the first radius of curvature. Bar material feeder. A cross section that passes through the axis of rotation of the lower guide roller and is perpendicular to the longitudinal axis of the feeder has an arcuate portion having a second center of curvature and a second radius of curvature. Cirvature,
The lower side that the second center of curvature is on the longitudinal axis of the feed arrow or is offset from the longitudinal axis of the feed arrow by a distance of 1% or less of the second radius of curvature. The bar material feeder according to claim 1, wherein the lower guide roller is positioned at the guide position. It is a bar material supply machine that feeds bar material to a bar material processing machine.
A guide section that guides the bar in the axial direction of the bar, and
A feed arrow that pushes out the rear end portion of the bar material so as to send the bar material to the bar material processing machine along the guide portion.
The drive device that drives the feed arrow and
Equipped with
The guide portion has a lower guide roller that is rotated by the lower side surface of the feed arrow when the rod material is fed.
A cross section that passes through the axis of rotation of the lower guide roller and is perpendicular to the longitudinal axis of the feeder has an arcuate portion having a second center of curvature and a second radius of curvature. Cirvature,
The lower side that the second center of curvature is on the longitudinal axis of the feed arrow or is offset from the longitudinal axis of the feed arrow by a distance of 1% or less of the second radius of curvature. A bar material feeder characterized in that the lower guide roller is positioned at a guide position. The bar material feeder according to claim 2 or 3, wherein the lower guide roller is arranged so as to be retractable downward from the lower guide position. The bar material feeder according to any one of claims 1 to 4, wherein the guide portion further includes an upper guide roller that is rotated by an upper side surface of the feed arrow when the bar material is fed. The cross section that passes through the rotation axis of the upper guide roller and is perpendicular to the longitudinal axis of the feeder has an arcuate portion having a third center of curvature and a third radius of curvature. ,
The upper guide that the third center of curvature is on the longitudinal axis of the feed arrow or is offset from the longitudinal axis of the feed arrow by a distance of 1% or less of the third radius of curvature. The bar material feeder according to claim 5, wherein the upper guide roller is positioned at a position. The bar material feeder according to claim 6, wherein the upper guide roller is arranged so as to be retractable upward from the upper guide position. The bar material feeder according to any one of claims 5 to 7, wherein the upper guide roller is further provided so as to be arranged in a pair above the corresponding lower guide roller. The upper guide roller and the lower guide roller in the pair are further provided so as to be arranged so that the distance between the upper guide roller and the lower guide roller can be changed. Item 8. The bar material feeder according to item 8. The bar material feeder according to claim 1 to 9, wherein the guide portion is supported by a support frame via a vibration-proof rubber.

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