JP5767904B2 - Bar alignment method and bar alignment apparatus - Google Patents

Description

  The present invention relates to a bar alignment method and a bar alignment apparatus that align a bar with a main shaft using a bar steadying device.

  The bar feeder supplies the bar to the lathe spindle. The bar feeder includes a material shelf for stocking the bar and a conveying device that receives the bar from the material shelf and conveys the bar to the processing machine. The transport device includes a support device that supports the bar, a feed rod that includes a finger chuck that holds the bar, and a bar steadying device that stops rotational deflection of the bar.

  The feed rod pushes the bar in a state where the end of the bar is held by the finger chuck, and feeds the bar to the main shaft of the lathe. The bar is fixed by the chuck of the main shaft and cut. During the cutting process, the bar steadying device suppresses the rotational runout of the bar.

  However, for example, when the inner diameter of the support device is larger than the inner diameter of the lathe main shaft, if the bar is fed to the lathe main shaft while moving on the lower surface of the support device, the bar interferes with the rear end of the lathe main shaft. , Not sent into the spindle. In this case, if a device for aligning the bar is attached to the main shaft, the manufacturing cost and the space occupied by the device are increased.

  Accordingly, an object of the present invention is to provide an additional apparatus, a bar alignment method and a bar alignment apparatus that align a bar with a main shaft without requiring an occupied space.

  Hereinafter, the features of the present invention will be described with reference numerals. Note that the reference numerals are for reference, and the present invention is not limited to the embodiments.

In the bar alignment method according to the first feature of the present invention, the bar (B1) is advanced toward the main shaft (7) of the processing machine (2) along the conveyance path, and a part of the bar is moved. A method of aligning a bar when supplying the bar to the main spindle of a processing machine via a bar steadying device (50) that holds the bar in a rotatable manner and stops the deflection of the bar. stop device comprises a first bar support mechanism (61A) and a second bar supporting mechanism for rotatably supporting a portion of the bar being rotated by the main shaft (61B), the rod At least one of the first bar support mechanism and the second bar support mechanism, which are partially disposed, is moved in the radial direction of the main shaft center line (A1) of the main shaft to position the bar on the main shaft center line. Match.

  Further, the first bar support mechanism and the second bar support mechanism are moved in opposite directions to sandwich a part of the bar.

  Further, when a part of the bar is sandwiched, the bar is aligned with the center line of the main shaft.

The bar alignment apparatus according to the second feature of the present invention includes a transfer device (20) that advances the bar (B1) toward the main shaft (7) of the processing machine (2) along the transfer path, and a bar shake stop device for stopping the rotatably sandwiched vibration bars are part of the bar (50), wherein the bar steady rest apparatus, one of the bar to be rotated by the main shaft A first bar support mechanism (61A) and a second bar support mechanism (61B) that rotatably support the portion , wherein the first bar support mechanism in which a part of the bar is disposed; At least one of the second bar support mechanisms is moved in the radial direction of the main shaft center line (A1) of the main shaft to align the bar with the main shaft center line.

  Further, the first bar support mechanism and the second bar support mechanism are moved in opposite directions to sandwich a part of the bar.

  Further, when a part of the bar is sandwiched, the bar is aligned with the center line of the main shaft.

  The bar steadying device (50) includes a link mechanism (70) that forms a parallel link together with the first bar support mechanism (61A) and the second bar support mechanism (61B).

  The link mechanism (70) is rotatably connected to the first bar support mechanism (61A) and the second bar support mechanism (61B) and is also connected to the first bar support mechanism (61A) and the second bar support mechanism (61A). The first link (71) supported so as to be swingable about the first fulcrum positioned between the bar support mechanisms (61B) of the first bar (71B), and arranged in parallel with the first link (71) and The first bar support mechanism (61A) and the second bar support mechanism (61B) are rotatably connected to each other, and between the first bar support mechanism (61A) and the second bar support mechanism (61B). The second link (72) is swingably supported with respect to the second fulcrum positioned on the first fulcrum, and the first link (71) and the second link (72) are parallel to each other. Oscillate about the first fulcrum and the second fulcrum.

  According to the above features of the invention, since the bar is aligned with the main axis of the main shaft using the bar steadying device, the additional device and the occupied space are omitted, and no additional cost is generated.

It is a front view showing the bar feeder and lathe concerning an embodiment. It is a top view of the bar feeder and lathe shown in FIG. It is a side view of the bar feeder shown in FIG. (A) is a partially broken side view of the feed rod, and (B) is a partially broken plan view of a conveying apparatus incorporating the feed rod. (A) is an elevation view of the bar steadying device shown in FIG. 2, and (B) is an elevation view of the device after operation. (A) is sectional drawing of the bar steadying apparatus along VIA-VIA shown in FIG. 5 (A), (B) is sectional drawing of the apparatus along VIB-VIB shown in FIG. 5 (A). It is. (A) is sectional drawing of the bar steadying apparatus along VIIA-VIIA shown in Drawing 5 (A), and (B) is a sectional view of the apparatus along VIIB-VIIB shown in Drawing 5 (B) It is. It is sectional drawing which shows a rod-material front-end | tip detection apparatus. It is sectional drawing which shows the position alignment of the bar by a bar steadying apparatus. It is sectional drawing which shows the position alignment of the bar by a bar steadying apparatus. (A)-(G) are the schematic diagrams which show operation | movement of a bar feeder. It is a flowchart which shows the control method of a bar feeder.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

  As shown in FIG. 1, the bar feeder 1 is arranged next to a lathe 2 as a processing apparatus. The bar feeder 1 includes a main body 3b supported by a base 3a, an upper lid 3c combined with the main body 3b, a control box 4 disposed under the main body 3b, and an operation panel 6 at the front of the main body 3b. Including.

  As shown in FIGS. 1 and 2, the lathe 2 includes a cylindrical main shaft 7 through which a bar B1 can pass. The lathe 2 includes a chuck 8 that holds the bar B1 at one end of the main shaft 7. The chuck 8 moves linearly with the main shaft 7 and is rotatable about a main axis A1 as the main axis. The lathe 2 has a cutting tool such as a cutting tool for processing the tip of the bar B1. The main shaft 7 may be a fixed type that does not move linearly.

  As shown in FIG. 2, the bar feeder 1 includes a material shelf 10 for stocking the bar B1. The feeder 1 includes a conveying device 20 that receives the bar B1 from the material shelf 10 and conveys it to the lathe 2. The material shelf 10 and the transfer device 20 are controlled by a control box 4 as a control device.

  As shown in FIG. 3, the material shelf 10 includes an inclined stocker 11 having a recess 11a in which bars B1 are arranged in parallel. The material shelf 10 includes an L-shaped take-out lever 12 that is rotatable about a rotation shaft 13 so as to lift the bar B1 from below. The material shelf 10 includes a cylinder 14 that drives a take-out lever 12. This cylinder 14 is swingably supported by the main body 3b. Then, the cylinder 14 is operated to rotate the take-out lever 12 in the clockwise direction, and the leading bar B1 is lifted by the tip 12a of the lever 12 and taken out from the recess 11a. This bar B1 moves toward the conveying device 20 along the slope 11b of the stocker 11.

  The transport device 20 includes a feed rod 21. As shown in FIG. 4, the feed rod 21 has a first feed rod 21A and a second feed rod 21B connected to the tip of the first feed rod 21A. The second feed rod 21 includes a finger chuck 21a that can grip the rear end of the bar B1, a bearing 21b that rotatably supports the finger chuck 21a, a push bar 21c that is fixed to the bearing 21b, a bearing 21b, A feed rod receiver 21d that accommodates a part of the rod 21c is provided. The feed rod receiver 21d has a fixed operation plate 21e.

  As shown in FIGS. 2 and 3, the transport device 20 includes a feed motor 22 that drives a feed rod 21. The transport device 20 includes a slider 23 fixed to the first feed rod 21A by a connecting plate 21f. The transport device 20 includes a slider guide 24 that is disposed along the axis A <b> 1 and that engages with the slider 23. As shown in FIG. 4B, the slider 23 has a connecting plate 23a and a primary lot 23b fixed to the connecting plate 23a. The conveying device 20 includes a slider 23, a drive chain 25 connected to the operation plate 21e, a drive sprocket 26 and a tip sprocket 27 on which the drive chain 25 is hung (see FIG. 2), an end plate 121 against which the operation plate 21e contacts, A chain guide 122 that guides the drive chain 25 and a clamp device 123 (see FIG. 11) for holding the bar B1 are included. The drive sprocket 26 is connected to the encoder 201 coaxially. Then, the delivery motor 22 is operated to rotate the drive sprocket 26. The rotating drive sprocket 26 travels the drive chain 25 via the tip sprocket 27 and moves the slider 23 and the operating plate 21e forward or backward.

  As shown in FIG. 3, the transport device 20 includes an attachment stay 28 attached to the base 29, and a support device 30 that is supported by the attachment stay 28 and supports the feed rod 21. The mounting stay 28 and the support device 30 are arranged at a predetermined interval along the axis A1.

  The support device 30 includes a lower support stay 31 that is supported by the mounting stay 28 with an anti-vibration rubber 41 interposed therebetween. The support device 30 includes an upper support arm 33 that is rotatably connected to a lower support stay 31 using a fulcrum shaft 32. The support device 30 includes a cylinder that drives the upper support arm 33 (not shown).

  The support device 30 includes a U-shaped lower support guide 36 connected to the lower support stay 31 by a lower connection rail 35. The support device 30 includes an upper support guide 38 connected to the upper support arm 33 by an upper connection rail 37. The support device 30 includes a support case 39 as a bush positioned inside the lower support guide 36. The support device 30 includes a U-shaped vibration-proof rubber 43 disposed between the lower support guide 36 and the support case 39.

  As shown in FIG. 3, the transport device 20 includes a vibration damping mechanism 40 that prevents the feed rod 21 from vibrating. The vibration damping mechanism 40 includes an anti-vibration rubber 41 disposed between the mounting stay 28 and the lower support stay 31. The vibration damping mechanism 40 includes an anti-vibration pad 42 made of urethane rubber, which is arranged at a predetermined interval along the axis A1 and is arranged with a gap from the top of the feed rod 21 (see FIG. 4). The anti-vibration pad 42 is fixed inside the upper support guide 38 with screws. The anti-vibration pad 42 forms a space that matches the size of the feed rod 21 together with the inner surface of the support case 39 and prevents the feed rod 21 from moving upward. The anti-vibration pad 42 may have a semi-circular cross section combined with the diameter of the feed rod 21 other than a rectangular cross section. The vibration damping mechanism 40 includes a U-shaped anti-vibration rubber 43 as an elastic body disposed between the support case 39 and the lower support guide 36. The anti-vibration rubber 43 can be replaced independently to accommodate partial wear.

  As shown in FIG. 2, the tip of the bar supply device 1 has a bar steadying device 50 that is disposed between the conveying device 20 and the processing machine 2 and faces the lathe 2. The bar steadying device 50 prevents the vibration from being transmitted from the rotating bar B1 to the feed rod 21 by stopping the deflection of the rotating bar B1 while holding the bar B1.

  As shown in FIG. 6, the bar steadying device 50 is fixed to the steadying base 52 attached to the base 29, the steadying base 52 fixed to the steadying base 51, and the steadying base 52. The bar holding mechanism 60, the link mechanism 70 that supports the bar holding mechanism 60 in a swingable manner, the stopper mechanism 80 that stops the operation of the link mechanism 70, and oil as a lubricant is supplied to the bar holding mechanism 60. An oil supply mechanism 90 is provided as a lubricant supply mechanism.

  The bar holding mechanism 60 includes a first bar support mechanism 61A and a second bar support mechanism 61B arranged in series along the main axis A1.

  The first bar support mechanism 61A includes an annular first bearing case 62, a pair of ball bearings 63, 63 as bearings fixed to the inner peripheral surface of the first bearing case 62, a ball bearing 63, A first rotating bush 64 as a rotating body fixed to 63, and an O-ring 65-65 for shock absorption as a cushioning material disposed between the first rotating bush 64 and the ball bearings 63, 63. . A lid 53 is disposed on the periphery of the first bearing case 62.

  The second bar support mechanism 61B is fixed to the first bearing case 62 and the annular second bearing case 66 disposed coaxially on the main axis A1, and to the inner peripheral surface of the second bearing case 66. A pair of ball bearings 67, 67 as a bearing, a second rotating bush 68 as a rotating body fixed to the ball bearings 67, 67, and a second rotating bush 68 and the ball bearings 67, 67. The shock absorbing O-ring 69-69 is used as a cushioning material. A lid 54 is disposed on the periphery of the second bearing case 66.

  Here, the first bearing case 62 includes first and second bearing case fulcrum shafts 62a and 62b arranged in the vertical direction and a third bearing arranged on the opposite side to the first bearing fulcrum shaft 62a. A case fulcrum shaft 62c is provided. The first and third bearing case fulcrum shafts 62a and 62c are positioned so as to coincide with the vertical center of the first bearing case 62, that is, the main axis A1. The second bearing case fulcrum shaft 62b is fixed to the bottom of the first bearing case 62 and extends in the lateral direction. The second bearing case fulcrum shaft 62b coincides with the first and third bearing case fulcrum shafts 62a and 62c at a position in the main axis A1 direction. Since the third bearing case fulcrum shaft 62c and the first bearing case fulcrum shaft 62a are supported on both sides of the first bearing case 62, they have a double-supported structure and suppress vibration amplification.

  Similarly, the second bearing case 66 has a first bearing case fulcrum shaft 66a, a second bearing case fulcrum shaft 66b, and a third bearing case fulcrum shaft 66c. The distance between the first and second bearing case fulcrum shafts 66a and 66b of the second bearing case 66 is the same as the distance between the first and second bearing case fulcrum shafts 62a and 62b of the first bear link case 62. Set equal. The distance between the first bearing case fulcrum shafts 62a and 66a of the first and second bearing cases 62 and 66 is the same as the distance between the second bearing case fulcrum shafts 62b and 66b of the first and second bearing cases. It is set equal to the distance.

  The first and second rotating bushes 64 and 68 use, for example, an elastic material such as urethane. The circular first and second rotating bushes 64 and 68 have arcuate inner peripheral surfaces.

  The link mechanism 70 includes a first link 71 rotatably connected to the first bearing case fulcrum shafts 62a and 66a of the first and second bearing cases 62 and 66. The link mechanism 70 includes a second link 72 rotatably connected to the second bearing case fulcrum shafts 62b and 66b of the first and second bearing cases 62 and 66. The link mechanism 70 is disposed on the opposite side of the first link 71 with respect to the main axis A1 and is rotatable about the third bearing case fulcrum shafts 62c and 66c of the first and second bearing cases 62 and 66. It has the 3rd link 73 connected. The first and second links 71 and 72 and the first and second bearing cases 62 and 66 constitute a parallel link. The first and third links 71 and 73 and the first and second bearing cases 62 and 66 also constitute a parallel link.

  The first link 71 is positioned at the center position between the first bearing case fulcrum shafts 62a and 62b of the first and second bearing cases 62 and 66, and is attached to the steady rest base 52 in a rotatable manner. 1 link fulcrum shaft 71a. The first link 71 has an equal arm length from the first link fulcrum shaft 71a to the first bearing case fulcrum shafts 62a and 66a of the first and second bearing cases 62 and 66, respectively.

  The second link 72 is arranged vertically and parallel to the first link 71. The second link 72 is positioned at the center position between the first bearing case fulcrum shafts 62a and 66a of the first and second bearing cases 62 and 66, and is supported by the steady rest base 52 in a rotatable manner. It has two link fulcrum shafts 72a. The second link fulcrum shaft 72a coincides with the first link fulcrum shaft 71a with respect to the position in the main axis A1 direction. The second link 72 has an equal arm length from the second link fulcrum shaft 72a to the second bearing case fulcrum shafts 62b and 66b of the first and second bearing cases 62 and 66, respectively.

  The third link 73 is disposed on the same horizontal plane as the first link 71 and the main axis A <b> 1, and is disposed in parallel with the first and second links 71 and 72. The third link 73 is positioned at the center position between the third bearing case fulcrum shafts 62c and 66c of the first and second bearing cases 62 and 66, and is attached to the steady rest base 52 in a rotatable manner. Link fulcrum shaft 73a. The third link fulcrum shaft 73a coincides with the first link fulcrum shaft 71a with respect to the position in the main axis A1 direction and the position in the vertical direction. The third link 73 has an equal arm length from the third link fulcrum shaft 73a to the third bearing case fulcrum shafts 62c and 66c of the first and second bearing cases 62 and 66, respectively.

  The third link 73 is operated by an air cylinder 81 as an actuator attached to the steady rest base 52 so as to be swingable. The air cylinder 81 has a piston rod 81a that can be moved forward and backward in the vertical direction (see FIG. 5B). The tip of the piston rod 81 a is connected to the tip of the third link 73 by a cylinder connection knuckle 84. The piston rod 81a may be connected to the first link 71 or the second link 72.

  As shown in FIG. 5, the stopper mechanism 80 includes a stopper mounting plate 82 attached to the air cylinder 81, a stopper screw 83 screwed to the stopper mounting plate 82 and capable of moving forward and backward, The cylinder link knuckle 84 is connected to the three links 73.

  As shown in FIG. 7, the oil supply mechanism 90 is provided between the bearings 63, 63, 67, 67 and between the first and second bearing cases 62, 66 and the first and second rotating bushes 64, 68. The oil reservoir spaces 91 and 92 as the lubricant reservoirs formed in the first and second rotary bushes 64 and 68 and the oil reservoir spaces 91 and 92 and the first and second rotary bushes 64 and 68 are formed. Oil supply holes 93 and 94 that communicate with the inner space of the first and second bearing cases 62 and 66, and joints 95 that are inserted into the case supply holes that communicate with the oil reservoir spaces 91 and 92, 96 and oil supply pipes 97 and 98 connected to the joints 95 and 96. The oil supply pipes 97 and 98 are connected to an oil pump 99 that supplies oil (see FIG. 2).

  Next, operation | movement of the bar steadying apparatus 50 is demonstrated.

  As shown in FIGS. 5A and 7A, the bar B1 is inserted into the first and second bearing cases 62 and 66. Next, as shown in FIG. 5B, the air cylinder 81 is operated to advance the piston rod 81a. The piston rod 81 a lifts the end of the third link 73 with the cylinder connecting knuckle 84. Further, when the piston rod 81a is advanced, the cylinder coupling knuckle 84 hits the stopper screw 83 and stops the advancement of the piston rod 81a. As a result, the third link 73 rotates counterclockwise around the third link fulcrum shaft 73a. As shown in FIG. 6 (B), the first link 71 and the second link 72 are linked to the third link 73 while maintaining a parallel posture to each other, respectively. It rotates counterclockwise around the shaft 71a and the second link support shaft 72a. In conjunction with the first and second links 71 and 72, the first and second bearing cases 62 and 66 maintain a parallel posture to each other, the first bearing case 62 is lowered, and the second bearing case 66 is To rise. That is, the first and second bearing cases 62 and 66 translate in opposite directions. As a result, as shown in FIG. 7B, the top of the first rotating bush 64 approaches the bar B1 from above. The bottom of the second rotating bush 68 approaches the bar B1 from below. And the top part of the 1st rotation bush 64 and the bottom part of the 2nd rotation bush 68 are arrange | positioned so that bar | burr B1 may be pinched | interposed from the upper and lower sides. Here, the top of the first rotary bush 64 and the bottom of the second rotary bush 68 may hit the bar B1. Further, the top of the first rotating bush 64 and the bar B1 and the bottom of the second rotating bush 68 and the bar B1 may have a gap therebetween.

  The tip of the stopper screw 83 may be moved in the axial direction by adjusting the amount of rotation of the stopper screw 83 by screwing the stopper screw 83. Thereby, the 3rd link 73 can be regulated according to bar material diameter, and parts exchange by bar material diameter can be made unnecessary.

  As shown in FIG. 8, the bar tip detecting device 110 includes a bar tip detecting plate 112 that is rotatably attached to a support shaft 111, a stopper 113 that stops the rotating bar detecting plate 112, and a bar detecting plate. The proximity sensor 114 is disposed to face the end 112 a of the 112. The bar detection plate 112 is biased counterclockwise by a spring in order to maintain the post-rotation posture. The proximity sensor 114 is normally turned on by detecting the end 112a of the bar detection plate 112. The proximity sensor 114 is turned off when it does not detect the end 112a of the bar detection plate 112 indicated by a virtual line. In addition, you may detect the front-end | tip of rod B1 using an infrared sensor.

  Next, a method for using the bar feeder 1 will be described.

  In FIG. 1, the bar feeder 1 is started by operating the operation panel 6.

  In FIG. 3, the upper support arm 33 is rotated counterclockwise with respect to the lower support stay 31, and the upper support guide 38 is separated from the lower support guide 36. Thereby, the upper part of the support case 39 is opened.

  Next, the cylinder 14 is operated to rotate the take-out lever 12 clockwise. The leading end 12a of the take-out lever lifts the leading bar B1 and takes it out from the recess 11a. The removed bar B1 descends the slope 11b of the stocker 11 and falls into the support case 39.

  In FIG. 2, the delivery motor 22 is operated to rotate the drive sprocket 26, and the slider 23 is moved along the slider guide 24 toward the lathe 2 by the drive chain 25.

  The primary lot 23a of the slider 23 pushes the rear end of the bar B1, and advances the bar B1 toward the main shaft 7 of the lathe 2 (see FIG. 11A).

  Further, the bar B1 further advances, the tip of the bar B1 hits the bar front end detection plate 112, and the bar detection plate 112 is rotated clockwise. The proximity sensor 114 is turned off and detects the position of the tip of the bar B1 (see FIG. 8). The amount of movement of the tip of the bar B1 from this position is detected by the encoder 201, and after the tip of the bar B1 has passed through the bar steadying device 50 (see FIG. 11B), the bar steadying device 50 Is closed, and the bar B1 is aligned with the main axis A1 of the main shaft 7 (see FIG. 11C).

  Specifically, as shown in FIG. 9, for example, the support inner diameter D1 is larger than the main shaft inner diameter D2, the height position of the bar B1 is lower than the main axis A1 of the lathe 2, and the rear end 7a of the main shaft 7 is located. If it interferes with, the bar steadying device 50 is operated. That is, as shown in FIG. 10, the second bar holding mechanism 61B is raised in the radial direction of the main axis A1, the bar B1 is lifted by the second rotating bush 68, and the bar B1 is positioned on the main axis A1. Match. On the other hand, the first bar holding mechanism 61A is lowered in the radial direction of the main axis A1. The top of the first rotating bush 64 is positioned so as to approach the top end of the bar B1, and the vertical difference G1 between the top of the first rotating bush 64 and the bottom of the second rotating bush 68 is the same as that of the bar B1. Set a little larger than the diameter. Thereby, the bar B1 can be smoothly moved between the first rotating bush 64 and the second rotating bush 68.

  The primary lot 23a of the slider 23 further pushes the bar B1 and causes the bar B1 to enter the main shaft 7 (see FIG. 11C). If the bar B1 is further advanced, and the bar B1 is reliably inserted into the main shaft 7, the bar steadying device 50 is opened and the slider 23 reaches the most advanced position of the primary lot (FIG. 11). (D)) The slider 23 is moved backward by the delivery motor 22, and the primary lot 23a is moved back to the origin position (see FIG. 11E).

  The feed rod 21 is returned, the bar steadying device 50 and the clamp device 123 are closed, and the bar B1 is fixed (see FIG. 11F). The rear end of the bar B1 is held by the finger chuck 21a.

  As shown in FIG. 3, the upper support arm 33 is rotated clockwise with respect to the lower support stay 31 to bring the upper support guide 38 closer to the lower support guide 36. As a result, the upper support guide 38 is positioned on the lower support guide 36, and the anti-vibration pad 42 is disposed with the gap between the top of the feed rod 21 and the gap.

  Again, the feed rod 21 is moved together with the bar B1 toward the lathe 2 on the axis A1, and the front end of the bar B1 is arranged in front of the chuck 8 of the lathe 2. The chuck 8 of the main shaft 7 grips the bar B1. (FIG. 11G). The lathe 2 is operated to rotate the main shaft 7 together with the bar B1. The tip of the bar B1 is cut with a blade.

  5B and 7B, the first and second rotating bushes 64 and 68 rotate with the rotation of the bar B1. Here, the bar B1 tends to rotate in the vertical and horizontal directions as it rotates. At this time, since the arc-shaped first and second rotating bushes 64 and 68 hold the bar B1 from the vertical direction, the vertical movement of the bar B1 is prevented. Moreover, since the space | interval of the 1st and 2nd rotation bushes 64 and 68 is narrower than bar B1 to the horizontal direction, the movement of the horizontal direction of bar B1 is restrict | limited. This prevents rotational deflection of the bar B1 in all directions. Further, since the O-rings 65 and 69 absorb the impact of the bar B1, the vibrations of the first and second bearing cases 62 and 66 and the noise accompanying the vibrations are reduced.

  On the other hand, in FIG. 7B, the oils L1 and L2 flow into the oil pool spaces 91 and 92 from the oil pump 99 through the oil supply pipes 97 and 98 and the joints 95 and 96, respectively. The oils L1 and L2 flow into the first and second rotary bushes 64 and 68 from the oil reservoir spaces 91 and 92 through the oil supply holes 93 and 94, respectively. The oils L1 and L2 cover the surface of the bar B1, the first and second rotating bushes 64 and 68, reduce the friction between the rotating bar B1 and the first and second rotating bushes 64 and 68, and The wear and breakage of the first and second rotary bushes 64 and 68 are prevented.

  Next, a control method of the bar feeder 1 will be described with reference to FIGS.

  The control box 4 operates the cylinder 14 to take out the bar B1 from the material shelf 11a and place it on the support device 30 (step S11, FIG. 11A). The control box 4 operates the feed motor 22 to move the slider 23 toward the main shaft 7 of the lathe 2. As a result, the primary lot 23a of the slider 23 is also advanced (step S12, FIG. 11B). The primary lot 23a pushes the rear end of the bar B1, and advances the bar B1 toward the main shaft 7 of the lathe 2.

  Further, the bar B1 further advances, and the tip of the bar B1 passes through the bar steadying device 50 and reaches near the rear end of the main shaft 7. When the position of the front end of the bar B1 is detected by the bar front end detection sensor 110 and the encoder 201, and the front end of the bar B1 passes the steady position 50 and is determined to be a predetermined position near the rear end of the main shaft 7 (step) The control box 4 operates the air cylinder 81 and closes the bar steadying device 50 (step S15, FIG. 11C). As a result, the bar B1 is aligned with the main axis A1 of the main shaft 7.

  After the front end of the bar B1 enters the main shaft 7 from the rear end of the main shaft 7, the control box 4 determines whether the bar B1 has reached the open position of the bar steadying device (step S16). When the bar B1 does not reach the predetermined position (NO in step S16), the feeding of the bar B1 is continued. On the other hand, when the bar B1 reaches a predetermined position (YES in step S16), the bar steadying device 50 is opened (step S17, FIG. 11D). The bar steadying device 50 may remain closed. The primary lot 23a is advanced to the forward end (step S18, FIG. 11 (D)).

  The control box 4 operates the feed motor 22 to move the slider 23 backward to retract the primary lot 23a to the origin (step S19, FIG. 11E). The control box 4 returns the feed rod 21 (step S20, FIG. 11 (F)). The control box 4 grips the bar B1 with the clamp device 123 (step S21, FIG. 11 (F)). The control box 4 advances the feed rod 21 and inserts the rear end of the bar B1 into the finger chuck 21a (step S22). The control box 4 opens the clamp device 123 (step S23), operates the feed motor 22 and advances the feed rod 21 (step S24). The control box 4 confirms that the tip position of the bar B1 has passed through the lathe chuck 8 (step S25), and sends the bar B1 to the lathe stopper (step S26, FIG. 11G). The lathe 2 closes the chuck 8 and holds the bar B1 with the chuck 8 (step S27). The main shaft 7 of the lathe 2 is rotated together with the bar B1, and the bar B1 is processed with the blade of the lathe 2 (step S28).

  According to the above embodiment, since the bar B1 is aligned with the main axis A1 of the main shaft 7 using the bar steadying device 50, the additional device and the occupied space are omitted, and no additional cost is generated.

  Control of the bar steadying device 50 eliminates the need to make the inner diameter of the support device 30 the same as the inner diameter of the main shaft 7. For this reason, even when the inner diameter of the main shaft 7 of the lathe 2 changes, it can be dealt with only by changing the feed rod 21.

  It should be noted that the above embodiments can be changed and modified without changing the gist of the invention. For example, the bar steadying device 50 can respond to changes in vibration due to the material diameter of the bar and the number of rotations by changing the mass of the rotating bush, the O-ring, and the hardness of the material. As a result, it is effective in preventing noise and taking measures against wear of the rotating bush.

  In addition to the bush type of the present embodiment, the bar steadying device uses a roller type (see Japanese Patent Laid-Open Nos. 2002-307205 and 2008-110459), and a belt type (Japanese Utility Model Laid-Open No. 5-29601). May be.

  Further, when the material is short, when there is no feed pipe escape operation, or when the tip of the bar B1 does not advance to the set position by primary introduction, steps S14 to S17 (in the position of arrow Q shown in FIG. The operation indicated by P) may be performed.

  Further, the control for closing the bar steadying device 50 is not limited to when the tip of the bar B1 enters the main shaft 7 of the lathe 2. The opening and closing of the bar steadying device 50 may be controlled so that the bar B1 is smoothly fed to the chuck 8 of the lathe 2 regardless of the position within the main shaft 7 of the lathe 2.

  Further, the closed position of the bar steadying device 50, that is, the vertical difference between the top of the first rotating bush 64 and the bottom of the second rotating bush 68 is set to be slightly larger than the diameter of the bar B1. In addition, you may match | combine with the diameter of bar B1.

DESCRIPTION OF SYMBOLS 1 Bar supply machine 10 Material shelf 20 Conveyance apparatus 30 Support apparatus 40 Vibration damping mechanism 50 Bar material steadying apparatus 60 Bar material holding mechanism 61A 1st bar material support mechanism 61B 2nd bar material support mechanism 62 1st bearing Case 63 Ball bearing 64 First rotating bush 65 O-ring 66 Second bearing case 67 Ball bearing 68 Second rotating bush 69 O-ring 70 Link mechanism 71 First link 72 Second link 73 Third link 80 Stopper mechanism 81 Air cylinder 83 Stopper screw 90 Oil supply mechanism 91, 92 Oil reservoir space 93, 94 Oil supply hole 97, 98 Oil supply piping

Claims (8)

The bar is advanced through a bar steadying device that advances the bar toward the spindle of the processing machine along the conveyance path, and rotatably holds a part of the bar to stop the bar from swinging. A method of aligning bars when supplying to the spindle of a processing machine,
The bar steadying device includes a first bar support mechanism and a second bar support mechanism that rotatably support a part of the bar rotated by the main shaft,
At least one of the first bar support mechanism and the second bar support mechanism in which a part of the bar is disposed is moved in the radial direction of the main shaft center line of the main shaft so that the bar material is placed on the main shaft center line. Align,
Bar alignment method. 2. The bar alignment method according to claim 1, wherein the first bar support mechanism and the second bar support mechanism are moved in opposite directions to sandwich a part of the bar. The bar alignment method according to claim 2, wherein when a part of the bar is clamped, the bar is aligned with the centerline of the main shaft . A transport device that advances the bar toward the spindle of the processing machine along the transport path;
A bar steadying device that clamps a part of the bar in a rotatable manner and stops the deflection of the bar, and
The bar steadying device is
A first bar support mechanism and a second bar support mechanism that rotatably support a part of the bar rotated by the main shaft;
At least one of the first bar support mechanism and the second bar support mechanism in which a part of the bar is disposed is moved in the radial direction of the main shaft center line of the main shaft so that the bar material is placed on the main shaft center line. Align,
Bar alignment device. The first bar support mechanism and the second bar support mechanism are moved in opposite directions to sandwich a part of the bar ;
The bar alignment apparatus according to claim 4. When sandwiching a part of the bar, the bar is aligned with the spindle centerline ,
The bar alignment apparatus according to claim 5. The bar steadying device is
The bar alignment apparatus according to claim 5 or 6, further comprising a link mechanism that forms a parallel link together with the first bar support mechanism and the second bar support mechanism. The link mechanism is
The first fulcrum that is rotatably connected to the first bar support mechanism and the second bar support mechanism and is positioned between the first bar support mechanism and the second bar support mechanism A first link supported so as to be swingable, and arranged in parallel with the first link and rotatably connected to the first bar support mechanism and the second bar support mechanism. A second link supported swingably about a second fulcrum positioned between the bar support mechanism and the second bar support mechanism;
The first link and the second link swing in a parallel posture with respect to the first fulcrum and the second fulcrum, respectively;
The bar alignment apparatus according to claim 7.

Images