JP4520546B2 - Billet surface cutting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a billet surface cutting device that can be easily installed in a billet carry-in line in an extruder for producing an aluminum extruded profile.
[0002]
[Prior art]
In order to produce high-quality extruded shapes, the surface of the billet to be put into the extruder is cut through a cutting device to remove the oxide film and the like attached to the surface, and the surface scratch may be corrected. . This is because the presence of these defects on the surface of the billet may degrade the quality of the extruded profile.
[0003]
A conventional cutting apparatus is configured in a lathe shape by combining a chuck mechanism that grips an end of a billet and a cutting tool that cuts the surface of the billet. Therefore, this one grips the billet via the chuck mechanism, rotates it at high speed in the circumferential direction, and moves the bite in the axial direction while contacting the outer periphery of the billet, thereby cutting the surface of the billet to form an oxide film, etc. Can be removed.
[0004]
In addition, a cutting device shall carry in / out a billet through transfer apparatuses, such as a loader apparatus. Further, the cutting device may grip both ends of the billet via a pair of front and rear chuck mechanisms, or may hold the billet via a chuck mechanism and a center pushing center. However, in the latter case, a center hole is formed in the billet axis.
[0005]
[Problems to be solved by the invention]
When such a conventional technique is used, the cutting tool has a problem in that cutting chips or the like adhere to the cutting edge portion, resulting in poor durability and a need for cutting oil during cutting. Moreover, since it is necessary for the cutting device to carry in / out the billet via the transfer device, the overall configuration including the transfer device becomes large, and it is difficult to incorporate the billet into the carry-in line of the billet placed in front of the extruder. In addition, the chuck mechanism needs to leave a grip mark at the end of the billet or form a center hole in the billet, so the end of the billet must be cut off, and the billet's effective working length is short. There was a problem of becoming.
[0006]
Accordingly, in view of the problems of the prior art, an object of the present invention is to realize sufficient durability without using cutting oil by combining a support roller for supporting a billet and a milling cutter. In addition, an object of the present invention is to provide a billet surface cutting device capable of miniaturizing the entire device and maximizing the effective use length of the billet.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the present invention is a billet surface cutting device incorporated in a billet carry-in line in an extruder, and is capable of moving up and down between front and rear conveyors for conveying a cylindrical billet. A loading conveyor, a support roller that is installed parallel to each other on both sides of the upper portion of the transfer conveyor, supports the billet and rotates in the circumferential direction, a milling cutter that cuts the surface of the billet on the support roller, and a billet on the support roller. The transfer conveyor is raised to the same height as the front and rear conveyors to convey the billet from the rear conveyor side to the front conveyor side in the axial direction, and the support roller The billet is transferred onto the support roller by lowering it between the milling rollers through the reference rollers before and after contacting the cut and uncut portions of the billet. Set the depth of cut, the rear portion of the reference roller is formed smaller in diameter only than the cutting depth milling, the front portion of the reference roller, and its gist that formed in the same diameter as milling.
[0008]
In addition, before and after pressing the billet on the support roller, the pressing roller can be provided so as to correspond to each reference roller.
[0009]
In addition, the pusher can be moved up and down between an operation position having the same height as the billet on the support roller and a retreat position above the billet, and the transfer conveyor is moved from the rear conveyor to the transfer conveyor. A stopper for positioning the billet fed up can be provided.
[0010]
Further, the support roller may be formed such that the front part supporting the cutting part has a larger diameter than the rear part supporting the uncut part of the billet.
[0011]
[Action]
When the cylindrical billet is carried in the axial direction, the support roller can be rotated in the circumferential direction while supporting the billet, and the milling machine can rotate the circumferential surface of the billet. The whole can be cut to remove deposits such as an oxide film on the surface of the billet. Since the milling cutter has a large number of cutting edges on the outer periphery, the time for each cutting edge to contact the surface of the billet can be minimized, and the surface of the billet can be cut at high speed without using cutting oil. be able to. However, the milling cutter at this time is preferably rotated at a remarkably higher speed than the rotational speed of the billet in the circumferential direction. On the other hand, at least two supporting rollers are installed in parallel to support the billet, and the billet may be rotated in the circumferential direction by positively rotating the supporting roller, or in the circumferential direction by another rotating member. It may be rotated. Further, the milling cutter may move the billet in the axial direction to cut the surface of the billet, or may move the billet in the axial direction for cutting.
[0012]
The milling machine sets the cutting depth via the reference roller, and even if the billet is not formed in the correct cylindrical shape, the surface of the billet is cut to a predetermined cutting depth following the shape of the billet. can do.
[0013]
If the reference rollers are disposed before and after the milling, the reference rollers contact the uncut and cut portions of the billet, respectively, and the cutting depth of the milling cutter can be kept constant from start to finish. In addition, before and after here, the side which carries in an uncut billet along the axial direction of a billet is made into back, and the side which carries out a billet after cutting is made into the front.
[0014]
The pusher can move the billet in the axial direction relative to the milling cutter by sending the billet on the support roller in the axial direction, and does not need to move the milling cutter.
[0015]
The support roller that forms the front part with a larger diameter than the rear part can support the uncut part of the billet by the rear part and can support the cut part by the front part, so that the front part of the billet may be inclined downward. Therefore, a good cutting state by a milling cutter can be obtained.
[0016]
By pressing the billet on the support roller, the presser roller prevents the billet from inadvertently vibrating on the support roller and the billet from being inadvertently rotated at high speed by the milling cutter. Operation can be realized.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
The billet surface cutting apparatus mainly comprises support rollers 11 and 11 for supporting the billet W and a milling cutter 21 (FIGS. 1 and 2). However, the support rollers 11 and 11 and the milling cutter 21 are combined with a pusher 31, a transfer conveyor 40, and presser rollers 51 and 51.
[0019]
Conveyors CA and CB are arranged before and after the transfer conveyor 40. The rear conveyor CA is formed in a roller conveyor shape by combining positively rotating rollers CA1, CA1,. The front conveyor CB is formed by combining drum-shaped rollers CB1, CB1,. The conveyors CA and CB are installed so that their transport surfaces have the same height.
[0020]
The transfer conveyor 40 incorporates a transport chain 41, guide rollers 42, 42... Into conveyor frames 43, 43, and is disposed between the support rollers 11, 11 (FIGS. 1 and 3). The conveyor frames 43 and 43 are connected via a channel-shaped reinforcing material 43a, and a guide rail 43b that slidably supports a lower traveling portion of the transport chain 41 is attached to the upper surface of the reinforcing material 43a. ing. Further, the conveyor frames 43 and 43 are supported so as to be movable up and down via cylinders 44 and 44 and a reinforcing material 43a standing on a base frame (not shown).
[0021]
The guide rollers 42, 42... Have large diameter flanges 42 a, 42 a on the left and right, respectively, and can rotate freely on the conveyor frames 43, 43 such that a part of the flanges 42 a, 42 a protrudes upward via the shaft 42 b. Built in. Further, the transport chain 41 is wound around the drive sprocket 41b at the shaft end of the drive motor 41c via guide rollers 42, 42... On the conveyor frames 43, 43, and tension sprockets (not shown).
[0022]
The transfer conveyor 40 can be raised to the same height as the conveyors CA and CB by extending the cylinders 44 and 44 (two-dot chain line in FIG. 3). At this time, the transfer conveyor 40 can support the billet W on the support rollers 11 and 11 from below via the transport chain 41, and by rotating the transport chain 41 by operating the drive motor 41c, The billet W can be conveyed from the conveyor CA side toward the conveyor CB side. Each guide roller 42 prevents the billet W on the transport chain 41 from falling through the flanges 42a and 42a. Further, the transfer conveyor 40 can be lowered between the support rollers 11 and 11 by shortening the cylinders 44 and 44 to transfer the billet W onto the support rollers 11 and 11 (solid line in the figure). .
[0023]
Stoppers 45, 45 are disposed in the intermediate portion of the transfer conveyor 40. The stoppers 45, 45 are assembled so as to be swingable up and down on both outer sides of the conveyor frames 43, 43 via a shaft 45a. The stoppers 45, 45 are connected via a lower connecting rod 45b, and the connecting rod 45b is connected to a rod 45c1 of a horizontal cylinder 45c attached to the lower part of the conveyor frames 43, 43. Therefore, when the transfer conveyor 40 is raised, the stoppers 45, 45 can shorten the cylinder 45c and swing upward so that the tip portion protrudes above the transfer conveyor 40 (two points in FIG. 3). When the transfer conveyor 40 is lowered, the cylinder 45c can be extended and swung downward to retract the tip to the same height as the conveyor frames 43 and 43 (solid lines in FIGS. 1 and 3). ).
[0024]
The support rollers 11 and 11 are installed in parallel to each other on both upper sides of the transfer conveyor 40. Each support roller 11 is formed such that the rear part on the conveyor CA side has a diameter D1 and the front part on the conveyor CB side has a diameter D2> D1 (FIGS. 1 and 4), and stands on the base frame 12. The support brackets 12a and 12a are rotatably supported. The support rollers 11 and 11 are connected to a common drive motor 13d via a chain 13 wound around the sprockets 11b and 11b, a tension sprocket 13a, a guide sprocket 13b, and a drive sprocket 13c attached to one end of each shaft. ing. The sprockets 11b and 11b are attached to one shaft end of the support roller 11 via a lock nut 11c. The support rollers 11 and 11 can support the billet W (solid line in FIG. 3, FIG. 5), and are positively rotated in the same direction via the drive motor 13d and the chain 13 (arrows in FIGS. 3 and 5). K1 and K1 directions), the billet W can be rotated in the circumferential direction (arrow K2 direction in the figure).
[0025]
Behind each support roller 11, a guide roller 14 is disposed on the same axis as the support roller 11 (FIGS. 2 and 4). The guide roller 14 is formed in a tapered shape having a small diameter on the rear side, and is rotatably supported via a bracket 12 d on the base frame 12.
[0026]
The milling cutter 21 is mounted on a bracket 25 that can swing up and down via a drive shaft 22, a rear bearing 25a, and a front bearing 25b (FIGS. 1 and 5). The bracket 25 is supported on a frame (not shown) via a shaft 25c so as to be able to swing up and down, and a swing lever 25d protruding from one end of the shaft 25c is connected to an upward cylinder 25e. Therefore, the bracket 25 extends and retracts the cylinder 25e to move up and down, so that the bracket 25e is moved up and down above the billet W and the operating position in contact with the billet W on the support rollers 11 and 11 (solid line in FIG. 5). The milling cutter 21 can be moved between the positions (two-dot chain lines in the figure).
[0027]
The bearings 25a and 25b are detachably mounted on the diagonally downward mounting surface of the bracket 25 via bolts 25a1 and 25a1 and bolts 25b1 and 25b1, respectively (FIGS. 5 and 6). However, FIG. 6 shows only one bolt 25a1 and 25b1 respectively. The bearings 25a and 25b are internally provided with tapered roller bearings 25a2 and 25a2 and self-aligning bearings 25b2 and 25b2, respectively, which rotatably support the drive shaft 22. The bearings 25a2 and 25b2 include Oil seals 25a3 and 25b3 are provided respectively. A bearing retainer 22d2 is incorporated in the bearing 25a via a star washer 22d1 and a lock nut 22d, and a bearing holder 25b4 and a bearing cover 25b5 are incorporated in the bearing 25b.
[0028]
A reference roller 23 and a milling cutter 21 are mounted on the drive shaft 22 between the bearings 25a and 25b, a reference roller 24 is mounted in front of the front bearing 25b, and a sprocket 22e is mounted behind the rear bearing 25a. ing.
[0029]
The milling cutter 21 is attached to the drive shaft 22 via a key 22a, and the reference roller 23 is attached via bearings 23a and 23a. A spacer 22 b is interposed between the milling cutter 21 and the reference roller 23. The reference roller 24 is attached to the drive shaft 22 via bearings 24a and 24a, and is prevented from coming off via a lock nut 22c, a spring washer 22c1 and a spacer 22c2. A prismatic portion 22c3 is formed at the front end of the drive shaft 22 on the reference roller 24 side through a male screw portion into which a lock nut 22c is screwed. The sprocket 22e is attached to the drive shaft 22 via a key 22f, and is prevented from coming off via a star washer 22e2 and a lock nut 22e1. The drive shaft 22 is connected to a drive motor 26 mounted on the bracket 25 via chains 22g and 22g wound around the sprockets 22e and 26a.
[0030]
The milling cutter 21 has a large number of cutting edges 21a, 21a,. The rear reference roller 23 is smaller in diameter than the milling cutter 21 by a cutting depth d≈ (D 2 −D 1) / 2, and the front reference roller 24 is formed in the same diameter as the milling cutter 21.
[0031]
The pusher 31 is mounted forward on the moving base 33 via the swing bracket 32 (FIGS. 1 and 2). The moving base 33 can move back and forth along the upper and lower guide rails 34 and 34 via the sliders 33a, 33a... And the screw shaft 35 (FIGS. 2 and 5). The guide rails 34 and 34 are attached to a side frame (not shown). Further, the moving base 33 is provided with a screw member 33 b that is screwed onto the screw shaft 35. The screw shaft 35 is connected to a drive motor 35d through a sprocket 35a, a chain 35b, and a sprocket 35c at the tip.
[0032]
The pusher 31 is attached to the tip of the swing bracket 32 via a receiving member 32c, and the receiving member 32c can allow the pusher 31 to tilt up and down and right and left by a predetermined angle. The swing bracket 32 is supported so as to be swingable up and down by brackets 33d and 33d projecting from the moving base 33 via a shaft 32b at the lower end of the leg portions 32a and 32a (FIGS. 1 and 5). The swing arm 32e protruding from the shaft 32b is connected to an upward cylinder 36 mounted on the moving base 33.
[0033]
Therefore, the pusher 31 can be moved back and forth between the rear of the support rollers 11 and 11 and the intermediate portion of the support rollers 11 and 11 by rotating the screw shaft 35 forward and backward via the drive motor 35d. Yes (in the direction of arrow K4 in FIG. 2). The swing bracket 32 can raise and lower the pusher 31 by expanding and contracting the cylinder 36 and rotating the shaft 32b forward and backward (in the direction of arrow K5 in FIG. 5). That is, the pusher 31 moves up and down between an operating position (dotted line in the figure) having the same height as the billet W on the support rollers 11 and 11 and a retracted position (not shown) sufficiently above the billet W. And
[0034]
Above and below the supporting rollers 11 and 11, front and rear pressing rollers 51 and 51 are arranged so as to correspond to the reference rollers 23 and 24 (FIGS. 1 and 5). Each presser roller 51 is attached to the tip of a pair of bell cranks 52, 52, and the other end of the bell cranks 52, 52 is connected to a cylinder 53. The bell cranks 52 and 52 are rotatably supported by a bracket 52b via an intermediate shaft 52a (FIG. 2). Therefore, the press rollers 51 and 51 can respectively extend the cylinder 53 to press the billet W on the support rollers 11 and 11 (solid line in FIG. 5), shorten the cylinder 53, and retract it upward (the same figure). Two-dot chain line).
[0035]
Such a billet surface cutting device operates as follows.
[0036]
The milling cutter 21 and the reference rollers 23 and 24 are raised to the retracted position via the cylinder 25e, and the presser rollers 51 and 51 are retracted upward via the cylinders 53 and 53 (two-dot chain line in FIG. 5, FIG. 7 ( A)). The pusher 31 is retracted via the screw shaft 35 (FIG. 2) and retracted upward via the cylinder 36. Further, the transfer conveyor 40 is raised through the cylinders 44, 44, the transport chain 41 is rotated through the drive motor 41c, and the stoppers 45, 45 are protruded upward through the cylinder 45c.
[0037]
Therefore, when the rollers CA1, CA1,... Of the conveyor CA are positively rotated, the billet W on the conveyor CA is fed onto the transfer conveyor 40 (in the direction of the arrow K6 in FIG. 7A), and is passed through the stoppers 45, 45. The tip is positioned so as to be positioned below the reference roller 23 (two-dot chain line in FIGS. 2 and 7A). The billet W is correctly guided onto the guide rollers 42, 42... Of the transfer conveyor 40 via the guide rollers 14 and 14 (two-dot chain line in FIG. 3).
[0038]
Thereafter, the transport chain 41 is stopped, the stoppers 45 and 45 are retracted downward, and the transfer conveyor 40 is lowered to transfer the billet W to the rear portions of the support rollers 11 and 11 (solid line in FIG. 3). Next, the rear presser roller 51 is lowered through the cylinder 53 to press the billet W toward the support rollers 11 and 11 (solid line in FIG. 5, FIG. 7B), and the reference through the cylinder 25e. The milling cutter 21 and the reference rollers 23 and 24 are driven to the operating position so that the roller 23 contacts the outer periphery of the billet W, and the pusher 31 is lowered to the operating position via the cylinder 36.
[0039]
Subsequently, the milling cutter 21 is rotated via the drive motor 26, the billet W is rotated in the circumferential direction via the drive motor 13d and the support rollers 11 and 11, and the pusher 31 is advanced to send the billet W in the axial direction. (In the direction of the arrow K7 in FIG. 7B), the milling cutter 21 can cut the outer periphery of the billet W fed in the axial direction while rotating in the circumferential direction in a spiral manner by the cutting depth d (FIG. 7 ( C)). At this time, the support rollers 11 and 11 support the uncut portion of the rear portion of the billet W by the rear portion of the diameter D1 (FIG. 4), and support the cut portion of the front portion by the front portion of the diameter D2≈2d + D1. This prevents the billet W from inadvertently tilting. Further, the reference roller 23 can maintain the milling cutter 21 at a predetermined cutting depth d with respect to the billet W by contacting the outer periphery of the uncut portion of the billet W.
[0040]
When the billet W advances and the cut portion comes into contact with the reference roller 24, the front pressing roller 51 is lowered through the cylinder 53, and the billet W is pressed together with the rear pressing roller 51 (FIG. 7C). . Therefore, when the rear end of the billet W passes the position of the reference roller 23 (two-dot chain line in the figure), the reference roller 24 can maintain the cutting depth d by the milling cutter 21 instead of the reference roller 23. it can. This is because the reference roller 24 has the same diameter as the milling cutter 21 and is in contact with the cut portion of the billet W.
[0041]
When the surface cutting of the billet W by the milling cutter 21 is completed, the milling cutter 21, the reference rollers 23 and 24, and the presser rollers 51 and 51 are retracted upward (FIG. 7D), and the support rollers 11 and 11 and the milling cutter 21 are stopped. . The pusher 31 is retracted and retracted upward, and the stoppers 45 and 45 are erected in order to position the cutting start position of the next billet W. Therefore, the transfer conveyor 40 is raised to rotate the transport chain 41, and the rollers CB1, CB1,... Of the conveyor CB are positively rotated, whereby the billet W that has been cut on the support rollers 11, 11 is placed on the conveyor CB. The billets W, W... From the conveyor CA can be cut in order and discharged onto the conveyor CB by repeating the same operation thereafter. .
[0042]
In the above description, the billet W may be moved in the axial direction of the billet W instead of being sent in the axial direction via the pusher 31. Further, instead of raising and lowering the transfer conveyor 40, the support rollers 11 and 11 may be raised and lowered. The billet W rotates the support rollers 11 and 11 in the circumferential direction via a rotating member such as another roller or belt instead of positively rotating the support rollers 11 and 11 in the circumferential direction. It may be rotated.
[0043]
【The invention's effect】
As described above, according to the present invention, the support roller can support the billet by rotating it in the circumferential direction and the milling cutter that cuts the surface of the billet on the support roller. Without forming a grip mark or the like on the part, the milling cutter can smoothly and quickly cut the surface of the billet without using cutting oil, and can improve the durability of the cutting edge. In addition to maximizing the effective use length of the billet, there is an excellent effect that the entire apparatus can be miniaturized and easily incorporated into the billet carry-in line in the extruder.
[Brief description of the drawings]
1 is an exploded perspective view of an overall configuration. FIG. 2 is an explanatory plan view of an overall configuration. FIG. 3 is an enlarged cross-sectional explanatory view corresponding to an arrow XX in FIG. 2. FIG. [Explanation of symbols] [Explanation of symbols] [Explanation of symbols]
d ... Cutting depth W ... Billet 11 ... Support roller 21 ... Milling cutters 23, 24 ... Reference roller 31 ... Pusher 51 ... Presser roller

Claims (5)

A billet surface cutting device incorporated in a billet carry-in line in an extruder, and a transfer conveyor that can be moved up and down disposed between front and rear conveyors for conveying a cylindrical billet, A support roller that is installed in parallel and supports the billet and rotates in the circumferential direction, a milling machine that cuts the surface of the billet on the support roller, and a pusher that sends the billet on the support roller in the axial direction. The transfer conveyor raises the billet to the same height as the front and rear conveyors to convey the billet from the rear conveyor side to the front conveyor side in the axial direction, and lowers the billet between the support rollers to move the billet to the front conveyor side. and transferred onto the supporting roller, said milling cutter, the cutting portion of the billet, to set the depth of cut through the reference roller before and after contacting each of the uncut portion, The reference roller parts are formed smaller in diameter by milling depth from the milling, the front portion of the reference roller, the surface cutting apparatus of the billet, characterized by forming the milling and the same diameter. Surface cutting apparatus of the billet of claim 1, wherein the provision of the front and rear pressing rollers hold down the billet on said support rollers so as to correspond to the respective reference roller. The pusher surface cutting apparatus of the billet of claim 1 or claim 2, wherein the raising and lowering between the upper retracted position of the billet and the same height as the operating position and the billet on said support rollers. The billet according to any one of claims 1 to 3 , wherein a stopper for positioning a billet fed from a rear conveyor onto the transfer conveyor is disposed at an intermediate portion of the transfer conveyor. Surface cutting device. The supporting rollers, from rear to support the uncut portion of the billet, the surface cutting of the billet according to any one of claims 1 to 4, characterized in that to form the front portion for supporting the cutting portion to the larger diameter apparatus.

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