JP2016159422A - Vibration prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely provide a material feeding machine having a rod stock aligning function without any great rectification.SOLUTION: A hole part 61 includes a plurality of holes 72 having an elastic member 83 disposed in an inner peripheral surface, and the inner diameter of the hole part 61 through which a rod stock 2 passes is defined by shifting the plurality of holes 72. When the rod stock 2 is fed, and before/after the rod stock 2 is chucked by a chuck 53, the size of the hole part is displaced.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a bar bracing device used in a bar feeding machine.

  Conventionally, a bar feeder that feeds a bar to a processing machine such as an NC automatic lathe is known. The bar feeder feeds the bar to the processing machine with the rear end of the bar gripped by the finger chuck. The tip of the bar fed to the processing machine is gripped by a chuck of the processing machine, and cutting is performed with a tool such as a cutting tool. In particular, when cutting a long bar, the spindle of the processing machine rotates at high speed in this cutting process, so the intermediate part of the bar that is not gripped by the chuck and the finger chuck tends to drop due to its own weight. Since the bar is swung when the axis does not coincide with the rotation axis of the main shaft, rotational runout occurs.

  In order to prevent such rotational runout, a bar feeder is usually provided with a bar stabilizer (see Patent Document 1).

This kind of bracing device suppresses the whirling of the bar material by bringing a contact body such as a bush or a roller into contact with the bar material. When the main shaft rotates at a high speed, the contact body contacts the bar material. Two positions are controlled: a closed position that suppresses the swirling of the bar, and an open position that does not interfere with the bar feeding operation by separating the contact body from the bar.
JP 2013-43272 A

  However, when the bar is sent to the processing machine and gripped by the chuck, the center of the bar is held by the contact body of the anti-vibration device, but the contact body is formed of an elastic member. Therefore, the rod is easily deformed by its own weight, and the deformation of the elastic member causes the axis of the bar to fall below the rotation axis of the main shaft. In the bar material gripped in such a state, the rotation axis of the main shaft and the axis of the bar do not coincide with each other.

  In order to solve such a problem, a bar centering device may be separately provided in the bar feeder, but a space for arranging this device is required and costs are increased.

  Therefore, the present invention has been made with the above-described problem as an example, and it is an object of the present invention to provide a material supply machine that has a function of aligning rods easily and reliably without significant improvement. .

  In order to solve the above-mentioned problem, the bracing device according to claim 1 is a brazing device for the bar (2) that is chucked in the processing machine (50) and rotated by the main shaft (51). And a bar support unit (60) for rotatably supporting the bar, and the bar support unit is disposed around the bar and is capable of contacting the bar (75). It is possible to displace the size of the space (61) formed inside the plurality of contact members by the arrangement of the plurality of contact members in front, and the bar is passed through the space, Before the bar is chucked by a processing machine, the size of the space is displaced so that a part of each contact member is pressed against the bar, and the rotation axis of the main shaft is It is characterized in that the axes of the bars are matched.

  Moreover, the anti-vibration device according to claim 2 is the anti-vibration device according to claim 1, wherein the unprocessed bar material is passed through the space and the tip portion is sent to the processing machine. 20), and the process of aligning the axis of the bar with the rotation axis of the main shaft is sent out by the bar feed-out means and before the tip of the unprocessed bar is chucked in the processing machine It is characterized by being performed.

  According to a third aspect of the present invention, there is provided the anti-seismic device according to the first aspect, wherein the unprocessed bar is passed through the space and a tip portion thereof is sent to the processing machine, and the processing machine is used. A bar feeding means (20) for feeding again the processed bar after being processed and released from chucking to the processing machine, and the process of aligning the axis of the bar with the rotation axis of the spindle is The bar material after the processing is sent out by the bar material feeding means, and again before the tip portion is chucked in the processing machine.

  According to a fourth aspect of the present invention, there is provided the anti-vibration device according to any one of the first to third aspects, wherein a part of each of the contact members is the rod before the main shaft is rotated. The size of the space is displaced so as to be adjacent to the material.

  Moreover, the anti-vibration device according to claim 5 is the anti-vibration device according to any one of claims 1 to 4, wherein the position and size of the space are adjusted according to the outer diameter of the bar. A holding means (99) for holding is provided.

  ADVANTAGE OF THE INVENTION According to this invention, a bar can be stably supplied to a processing machine, without performing a drastic improvement and without generating the whirling of a bar.

It is a schematic diagram of the material supply machine visually recognized from the front. It is a schematic diagram which shows the example of supply of the bar in a material supply machine, Fig.2 (a) is a structural example of a material supply machine, FIG.2 (b) is an enlarged view of A part of Fig.2 (a). It is a schematic diagram which shows the structural example of the bar material support unit which shows the state which made the hole the maximum diameter, FIG. 3 (a) is a structural example of the bar material support unit in front view, FIG.3 (b) is in side view. It is an example of composition of a bar material support unit. It is a schematic diagram which shows the structural example of an annular member. It is a schematic diagram which shows the structural example of the bar | burr support unit which shows the state which press-contacted the hole with respect to the bar | burr, FIG.5 (a) is a structural example of the bar | burr support unit in front view, FIG.5 (b) is FIG. It is a structural example of the bar | burr material support unit in a side view. It is a schematic diagram which shows the structural example of the bar | burr support unit which shows the state which adjoined the hole with respect to the bar | rod, FIG.6 (a) is a structural example of the bar | burr support unit in front view, FIG.6 (b) is FIG. It is a structural example of the bar | burr material support unit in a side view. It is a flowchart figure which shows the operation example of a bar feeder. It is a schematic diagram which shows other embodiment of a bar | burr material support unit, Fig.8 (a) shows the state of the roller before a movement, FIG.8 (b) shows the state of the roller after a movement.

  Hereinafter, embodiments of the present application will be described with reference to the accompanying drawings.

  The material supply machine M of the present embodiment supplies a material to a material processing machine called a lathe (hereinafter referred to as “processing machine 50”) as an example, and is disposed adjacent to the processing machine 50. The

  As shown in FIG. 1, the material supply machine M includes a main body 5 that supplies a bar 2 as a material to the processing machine 50 and a base 7 that supports the main body 5 at a predetermined height.

  The main body 5 includes a bar holding part 10 that holds the bar 2 supplied from the outside, and a bar sending part 20 (the bar sending means of the present application) that sends the bar 2 to the processing machine, The bar 2 held by the bar holding unit 10 is sent to the processing machine 50 by the bar sending unit 20.

  The main body 5 includes a bar supply unit (not shown) that appropriately supplies the bar 2 supplied from the outside to each bar holding unit 10, but since it is conventionally known, its details are omitted.

  On the other hand, the processing machine 50 includes a cylindrical main shaft 51 through which the bar 2 can pass, and the main shaft 51 is provided with a chuck 53 that holds the tip of the bar 2. The bar 2 is rotated while being gripped by the chuck 53, and is processed by a predetermined cutting tool (for example, a cutting tool) (not shown).

  As shown in FIG. 1, the bar holding part 10 includes a holder 13 that is formed on the base 7 in a substantially semicircular shape so as to extend in the longitudinal direction, and the bar 2 is attached to the holder 13. Then, it is sent to the main shaft 51 of the processing machine 50 by being sent to the processing machine side.

  Although not shown, for example, the bar 2 is supplied to the holder 13 from a bar supply shelf for placing the bar 2 supplied from the outside by the bar supply unit.

  The rod material delivery unit 20 includes a pusher 31 for conveying the rod material 2 received by the holder 13 to the processing machine.

  The pusher 31 includes, for example, a slider 33 having a circular cross section that can move freely along the longitudinal direction of the holder 13, a push rod 34 that is disposed in front of the slider 33 and pushes out the bar 2, A finger chuck 35 is disposed in front of the push rod 34 via a bearing and holds the rear end portion of the bar 2.

  2 (a) and 2 (b), the rear end of the bar 2 is held by the finger chuck 35, and the tip of the bar 2 is pushed by the push rod 32 being pushed by the movement of the slider 33. Is gripped by the chuck 53 of the processing machine 50 and sent to the processing machine side until it is abutted against the stopper 54.

  The slider 33 is controlled to advance and retreat in the holder 13 by a driving means (not shown), and the rod 2 is sent to the processing machine by advancing the push rod 34. This driving means is conventionally known. Therefore, the description thereof will be omitted.

  Further, as shown in FIG. 1, a bar support unit 60 (a bracing device of the present application) that rotatably supports the bar 2 is provided in front of the holder 13, and the bar is supported by the bar support unit 60. 2 swings are prevented.

  As shown in FIGS. 3 to 5, the bar support unit 60 has a hole 61 that can displace the diameter of the hole through which the bar 2 passes, and the bar 2 pushed out by the pusher 31 is the hole. 61 is sent to the spindle 51 of the processing machine 50 while being rotatably supported by the hole 61.

  As shown in FIG. 3 (b), the bar support unit 60 has a housing 65 having front and rear openings 64 through which the bar 2 can penetrate, and the inside of the housing 65 has an opening 64 interposed therebetween. And a support mechanism 70 that supports the bar 2 penetrating the housing 65.

  The support mechanism unit 70 includes a plurality of annular members 75 (supports of the present application) having holes 72 through which the bars 2 arranged side by side in the front-rear direction can pass (see FIG. 4).

  As shown in FIG. 3 (b), the support mechanism unit 70 includes a first annular member 75A disposed in the center, and second and third annular members 75B and 75C disposed before and after the first annular member 75A. As shown in FIG. 3A, the second and third annular members 75B and 75C are arranged on the lower left and right sides at the same angle (120 degrees) from the first annular member 75A. That is, the first to third annular members 75A to 75C are evenly arranged around the rotation axis of the main shaft.

  The first to third annular members 75A to 75C are rotatably attached to pins 76 attached to the housing 65, and the second and third annular members 75B and 75C are arranged so that the holes 72 overlap each other. The link 77 is connected to the first annular member 75A.

  As shown in FIG. 4, each annular member 75 is formed with a recess 82 around the through hole 81 on one surface of a plate-like member 80 in which the through hole 81 is formed, and an annular ball is formed in the recess 82. The bearing 83 is assembled, and an annular elastic member 85 (contact member of the present application) is disposed on the inner peripheral surface thereof. As an example, the elastic member 85 is a urethane bush. The inside of the elastic member 85 functions as a hole 72 through which the bar 2 is inserted.

  As shown in FIGS. 3, 5, and 6, the hole 72 formed in each annular member 75 is a hole portion through which the bar 2 can pass by a part of the inner peripheral surface of each hole 72. 61 (space) is formed, and the size of the hole 61 (inner diameter through which the bar 2 can pass) is defined.

  As described above, the size of the hole 61 is displaced by the overlapping state of the holes 72 formed in each annular member 75, and the maximum diameter is the center of all the holes 72. Are coincident with each other (FIG. 3) and coincide with the diameter of the hole 72 formed in each annular member 75, and the center of the hole 72 coincides with the rotation axis X of the main shaft 51.

  Further, the size of the hole 61 is displaced by the movement of the first annular member 75A. For example, when the cylinder lever 93 is pushed up by the air cylinder device 92 as described later, as shown in FIGS. The distal end side of the first annular member 75A rotates with the pin 76A as a fulcrum, and the distal ends of the second and third annular members 75B and 75C also rotate with the pins 76B and 76C as fulcrums. Due to this displacement, the holes 72A to 72C of the respective annular members 75A to 75C are disengaged radially outward of the rotation axis X, are displaced and overlapped with each other, the size of the hole 61 is reduced, and the hole 61 The outer diameter of the bar 2 that can pass through is narrowed.

  In the present embodiment, in the feeding operation of the bar 2 to the processing machine 50, as shown in FIG. 3, the centers of the holes 72A to 72C of the annular members 75A to 75C are made to coincide with each other, and the size of the hole 61 is increased. By setting the thickness to the maximum diameter, the bar 2 can be easily passed through the hole 61. In this delivery operation, the size of the hole portion 61 is not necessarily the maximum diameter, and may be a diameter through which the bar 2 can pass. Specifically, the outer diameter of the bar 2 may be equal to or larger. Therefore, the size of the hole 51 may be displaced so that at least the inner peripheral surface of the hole 61 is adjacent to the bar 2.

  Further, if the axis of the bar 2 does not coincide with the rotation axis X, the bar 2 swings around, and as shown in FIG. Before chucking, the size of the hole 61 is displaced so that a part of the inner peripheral surface of the holes 72A to 72C of the annular members 75A to 75C is pressed against the rod member 2 to rotate the axis of rotation. The tip of the bar 2 is chucked in a state where the axis of the bar 2 is aligned with X, and the rotation axis X and the axis of the bar 2 are aligned.

  Further, the size of the hole 61 is displaced so that a part of the inner peripheral surface of the holes 72A to 72C of each of the annular members 75A to 75C is pressed against the bar 2 so that the pressing tool 31 can be displaced. In contrast, the axis of the pressing tool 31 can be aligned with the rotation axis X, and the bar 2 can be stably supplied to the processing machine.

  Further, before rotating the main shaft 51, as shown in FIG. 6, the hole portion 61 is configured such that the bar 2 is gripped by a part of the inner peripheral surface of the holes 72A to 72C of the annular members 75A to 75C. The axis of the rod 2 held by the hole 61 coincides with the rotation axis X while the rod 2 is rotatably supported by the holes 72A to 72C of the annular members 75A to 75C In this state, the bar 2 is prevented from swinging during cutting.

  Here, “gripping” of the bar 2 is preferable as long as the bar 2 is rotatably supported by a part of the inner peripheral surfaces of the holes 72A to 72C of the annular members 75A to 75C. As shown in an operation example to be described later, a state in which a part of the inner peripheral surface of the holes 72A to 72C of the annular members 75A to 75C is adjacent to the bar 2 is described. A part of the inner peripheral surface of each of the holes 72A to 72C is in contact with a weak force applied to the bar 2, or the inside of the holes 72A to 72C of one of the three annular members 75A to 75C. A state having a slight gap (space) between the peripheral surface and the outer peripheral surface of the bar 2 is also included.

  Further, “adjacent” refers to a state in which a part of the inner peripheral surface of each hole 72 is present adjacent to the bar 2 and the elastic member 83 provided on the inner peripheral surface is not elastically deformed, “Pressure contact” refers to a state in which pressure is applied to a part of the inner peripheral surface of each hole 72 to contact the bar 2 and the elastic member 83 provided on the inner peripheral surface is elastically deformed.

  Further, the bar support unit 60 includes a pressing mechanism 90 that presses the side surface of the first annular member 75A as shown in FIGS. The pressing mechanism 90 functions as a displacing unit that displaces the size of the hole 61. For example, the pressing mechanism 90 is attached to the housing 65 and is connected to the air cylinder device 92 that can extend and contract the shaft 91 and the tip of the shaft 91. 5 and 6, by extending the shaft 91, the cylinder lever 93 is pushed upward obliquely, and the pin 76A is moved by the pressing force generated by the movement of the cylinder lever 93. The distal end side of the first annular member 75A is rotated counterclockwise as a fulcrum to move the position of the hole 72A. By the operation of the first annular member 75A, the second and third annular members 75B and 75C connected by the link 77 also operate, and the positions of the holes 72B and 72C also move.

  By the operation of the pressing mechanism 90, the first to third annular members 75A to 75C are displaced, and the holes 72A to 72C are moved outward in the radial direction of the rotation axis X, thereby the three holes 72A to 72C. It is possible to reduce the size of the defined hole 61.

  In this embodiment, the size of the hole 61 is displaced to a predetermined size by controlling the amount of expansion and contraction of the shaft 91 of the pressing mechanism 90.

  Further, as shown in FIGS. 3, 5, and 6, the bar support unit 60 includes a holding adjustment mechanism unit that adjusts and holds the position and size of the hole 61 according to the outer diameter of the bar 2. 95.

  The holding adjustment mechanism 95 includes, for example, a vertically extending shaft 97 provided with a rotatable adjustment bolt 96, an air cylinder device 98 that moves vertically along the longitudinal direction by the rotation of the shaft 97, and the air cylinder 98. Stopper pin 99 (holding means of the present application) that can be moved back and forth in the horizontal direction by driving, and when the adjustment bolt 96 is rotated to release the drive of the air cylinder device 92, for example, each of the annular members 75A to 75C The positions of the stopper pins 99 are adjusted according to the diameter of the bar 2 so that a part of the inner peripheral surfaces of the holes 72A to 72C are adjacent to the bar 2.

  In this way, the stopper pin 99 is projected and engaged with the cylinder lever 93 so that the cylinder lever 93 can be fixed, and the position and size of the hole 61 are suitable for the outer diameter of the bar 2. The position and size can be adjusted and held, and the state in which the axis of the bar 2 held by the hole 61 and the rotation axis X are matched can be held.

  Further, the casing of the air cylinder device 98 is provided with a stopper 100 that protrudes above the cylinder lever 93, and the upward movement of the cylinder lever 93 that exceeds a specified value is restricted. The stopper 100 prevents the diameter of the hole 61 from being displaced excessively, reduces the pressure applied to the elastic member, and prevents the elastic member from being damaged.

  Next, an operation example of the material supply machine M of the present embodiment will be described in detail. In the following description, “extraction operation” refers to an operation of supplying the unprocessed bar 2 to the holder 13, and “introduction operation” refers to a position at which the bar 2 after the extraction operation is gripped by the processing machine. This is an action to move to. The “unprocessed bar” means a new bar that has not been processed by the processing machine 50.

  The material supply machine 1 according to this embodiment is an apparatus that supplies the bar 2 to the processing machine. First, in the material supply machine, the bar 2 is taken out (step S101). In this take-out operation process, when an unprocessed bar 2 is supplied to the holder 13 from the outside, the slider 33 is advanced, and first, the bar 2 is moved to a specified position. Next, the slider 33 is returned to the initial position, and the feed pipe 34 evacuated outward in advance between the slider 33 and the bar 2 is returned. Then, the slider 33 is advanced again, the feed pipe 34 is advanced, and the rear end of the bar 2 is gripped by the finger chuck 35.

  Next, an introduction operation process for the bar 2 is performed (step S102). In this introduction operation process, the slider 33 is further advanced, and the bar 2 is passed through the hole 61 of the bar support unit 60 while the rear end of the unprocessed bar 2 is held, and the tip of the bar 2 The part is sent to the spindle 51 of the processing machine 50.

  In this rod 2 introduction operation process, the rod support unit 60 operates the pressing mechanism 90 to displace the size of the hole 61 to a predetermined size. Specifically, in the present embodiment, since the centers of the holes 72A to 72C of the annular members 75A to 75C coincide with each other at the initial position, the pressing mechanism 90 need not be operated. Thereby, the magnitude | size of the hole part 61 can be made into the maximum diameter, and it becomes easy to pass the bar 2 easily.

  In this introduction operation process, the size of the hole portion 61 is not necessarily the maximum diameter, and it is only necessary to have a diameter through which the bar 2 can pass. I just need it. Therefore, the size of the hole 51 may be displaced so that at least the inner peripheral surface of the hole 61 is adjacent to the bar 2.

  Next, a bar centering process is performed (step S103). In this bar centering process, the bar 2 passes through the hole 61 and is sent to the main shaft 51. Before the tip of the bar 2 is chucked by the chuck 53, the pressing mechanism 90 is operated. The bar 2 is centered. Specifically, the size of the hole 61 is displaced so that a part of the inner peripheral surfaces of the holes 72A to 72C of the annular members 75A to 75C are pressed against the bar 2, and the rotation axis X And the axis of the bar 2 are matched.

  Next, chuck processing of the bar 2 in the processing machine is performed (step S104). In this chucking process, the tip of the bar 2 is gripped by the chuck 53.

  Next, after this chucking process, the bar is cut (step S105). In this cutting process, the hole 61 is expanded in order to make the bar 2 rotatable. Specifically, the stopper pin 99 is protruded to stop the operation of the pressing mechanism 90, and a part of the inner peripheral surface of the holes 72A to 72C of the annular members 75A to 75C is adjacent to the bar 2. Thus, the size of the hole 61 is displaced.

  Note that the pressing mechanism 90 may be operated without stopping. Since the air cylinder device 92 of the pressing mechanism 90 does not have to be driven (operated) by stopping the pressing mechanism 90 as in the present embodiment, the life of the driving unit (cylinder device) is increased and the control program is increased. It is possible to simplify.

  Then, the spindle 51 is rotated and the cutting tool is brought into contact with the bar 2 to perform the cutting process. Then, the chuck 2 is released from the bar 2 in the processing machine (step S106), and then the bar end. Is determined (step S107). If the determination in step S107 is affirmed, the process ends. If the determination is negative, a bar feed process is performed (step S108), and the process returns to step S103. In step S108, the slider 33 is advanced, and the bar 2 is sent out by a specified amount and sent to the main spindle 51 of the processing machine. Thereafter, the processing in steps S103 to S106 is repeated. Note that the “sending process” refers to an operation in which the bar sending unit 20 moves the processed bar to a position where it is gripped by the processing machine.

  By the way, in step S106, when the tip of the processed bar 2 is released from the chuck 53, a load due to its own weight is applied to the hole 72 supporting the bar 2, so that the inner peripheral surface of the hole 72 is applied. The arranged elastic member 83 is deformed by its own weight and sinks downward. If chucking is performed by the chuck 53 of the processing machine 50 in this state, the axis of the bar 2 and the rotation axis X do not coincide with each other, which causes a swing.

  Therefore, in the present embodiment, a part of the bar 2 processed by the processing machine is discharged to the outside, the bar 2 is released, and the bar 2 after processing is processed by the bar feed section 20. Before the tip 53 is chucked in the processing machine again by the chuck 53, the inner circumferential surface of the hole 61 is pressed (pressed) against the bar 2 and centered. In this state, the tip of the bar 2 is chucked by the chuck 53, and before the main shaft 51 rotates, the hole is so arranged that the inner peripheral surface of the hole 61 is adjacent to the bar 2. Expand the size of 61.

  Specifically, the pressing mechanism 90 is operated so that a part of the inner peripheral surfaces of the holes 72A to 72C of the annular members 75A to 75C are pressed against the bar 2 so that the holes 61 The size is displaced so that the rotation axis X and the axis of the bar 2 coincide with each other, and then a part of the inner peripheral surfaces of the holes 72A to 72C of the annular members 75A to 75C are adjacent to the bar 2. Thus, the size of the hole 61 is displaced.

  Then, such an operation is repeated until the prescribed amount of cutting is finished, and the process is finished. In the feeding operation of the bar 2, the stopper pin 99 is pulled in so that the centers of the holes 72 </ b> A to 72 </ b> C of the annular members 75 </ b> A to 75 </ b> C coincide with each other to make the hole portion have the maximum diameter. In the delivery process of the bar 2, the size of the hole 61 is not necessarily the maximum diameter, but may be a diameter through which the bar 2 can pass.

  As described above, the bar support unit 60 in the bar feeder M according to the present embodiment includes the hole 61 including a plurality of holes 72A to 72C in which the elastic member 83 is disposed on the inner peripheral surface, and the plurality of holes 72A. The inner diameter of the hole 61 through which the bar 2 can be passed by shifting 72 C is determined. When the bar 2 is sent out, and before and after chucking the bar 2 by the chuck 53, the hole 61 The occurrence of runout is prevented by displacing the size of.

  In particular, before chucking the tip of the bar 2, chucking is performed by displacing the size of the hole 61 so that the inner peripheral surface of the hole 61 is pressed against the bar 2. Before the main shaft 51 is rotated, the hole 61 is enlarged in size so that the inner peripheral surface of the hole 61 is adjacent to the bar 2 and cutting is performed.

  Thereby, when the main shaft 51 rotates, the axis of the bar 2 and the rotation axis X of the main shaft 51 can be made to coincide with each other, so that the occurrence of run-out can be prevented.

  Next, another embodiment of the bar support unit 60 will be described with reference to FIG.

  The bar support unit 60 described above overlaps a plurality of annular members 75A to 75C, and the size of the hole 61 through which the bar 2 can pass is displaced by the overlapping state of the holes 72A to 72C of the annular members 75A to 75C. The bar support unit 120 according to the present embodiment has a plurality of contact members 125 that can come into contact with the bar 2, although the outer peripheral surface of the bar 2 is supported by the inner peripheral surfaces of the holes 72 </ b> A to 72 </ b> C. It arrange | positions equally around the bar | burr 2 and the magnitude | size of the space 130 formed inside each contact member 125 is displaced by the arrangement | positioning condition of each contact member 125, and the outer peripheral surface of each contact member 125 is made into the bar | burr 2 It is different in that the bar 2 is supported by being brought into contact with the peripheral surface.

  As shown in FIG. 8, the contact member 125 includes, for example, a roller 126 that is cylindrical and formed of an elastic member. The roller 126 may be formed by using, for example, a metal member and attaching an elastic member to the peripheral surface thereof.

  For example, four rollers 126 are equally arranged around the space 130 through which the bar 2 passes, and each roller 126 moves the roller 126 toward the rotation axis X of the main shaft 51 or from the rotation axis X. The moving mechanism part 140 for separating is provided. For example, a cylinder device is used as the moving mechanism unit 140, and each cylinder device is driven in synchronization.

  The roller 126 is controlled to move so that the roller 126 approaches or separates toward the rotation axis X of the main shaft 51 by driving each cylinder device.

  That is, the size of the space 150 through which the bar 2 passes can be displaced by the movement of the roller 126. As described in the above-described embodiment, in the feeding process and the introducing operation process of the bar 2, the bar 2 The roller 126 is adjacent to the circumferential surface of the roller 126 or the roller 126 is separated from the bar 2. In the centering process, the roller 126 is pressed against the bar 2, and in the cutting process, the outer peripheral surface of the roller 126 is adjacent to the bar 2.

  In addition, this application is not limited to this embodiment, It can implement in a various form. For example, in the present embodiment, the hole is configured using three annular members, but the number of the holes is not limited to the number as long as the hole is configured by a plurality.

  Moreover, although the bar support unit 60 of this embodiment is attached integrally with the bar supply machine M, you may provide separately separately.

M Material feeder 2 Bar 50 Processing machine 51 Spindle 60 Bar support unit 61 Hole 72 Hole
75 Ring member 99 Stopper pin

Then, after the chuck processing, cutting processing of the bar is carried out (step S105). In this cutting process, the hole 61 is expanded in order to make the bar 2 rotatable. Specifically, the stopper pin 99 is protruded to stop the operation of the pressing mechanism 90, and a part of the inner peripheral surface of the holes 72A to 72C of the annular members 75A to 75C is adjacent to the bar 2. Thus, the size of the hole 61 is displaced.

That is, the size of the space 150 through which the bar 2 passes can be displaced by the movement of the roller 126. As described in the above-described embodiment, in the feeding process and the introducing operation process of the bar 2, the bar 2 The roller 126 is adjacent to the circumferential surface of the roller 126 or the roller 126 is separated from the bar 2. In the centering process, the roller 126 is pressed against the bar 2, and in the cutting process, the peripheral surface of the roller 126 is adjacent to the bar 2.

Claims (5)

A bar brace that is chucked in a processing machine and rotated by a main shaft,
A bar support unit that rotatably supports the bar;
The bar support unit is
A plurality of contact members arranged around the bar and capable of contacting the bar;
The arrangement of the contact members can displace the size of the space formed inside the contact members,
The size of the space is such that a portion of each contact member is pressed against the bar before the bar is passed through the space and the bar is chucked by the processing machine. Is displaced so that the axis of the bar coincides with the axis of rotation of the main shaft. Passing the unprocessed bar material through the space, comprising a bar material feeding means for feeding the tip to the processing machine,
The process of making the axis of the bar coincide with the axis of rotation of the main spindle is performed before the tip of the unprocessed bar is chucked by the processing machine, being fed by the bar feeding means. The bracing device according to claim 1, wherein The unprocessed bar is passed through the space, and its tip is sent to the processing machine, and the processed bar after being processed by the processing machine and released from chucking is sent back to the processing machine. It has a bar feeding means,
The process of aligning the axis of the bar with the axis of rotation of the main shaft is performed after the processed bar is sent out by the bar feed-out means, and again before its tip is chucked in the processing machine. The anti-rest device according to claim 1, wherein the anti-vibration device is performed.   The size of the space is displaced so that the bar is gripped by a part of each contact member before the main shaft is rotated. The bracing device described.   The anti-vibration device according to any one of claims 1 to 4, further comprising a holding unit that adjusts and holds the position and size of the space according to an outer diameter of the bar.

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