JP2000280111A - Surface cutting apparatus for billet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maximize the effective service length of a billet by incorporating the billet into the carrying-in line for the billet in an extruder. SOLUTION: This cutting apparatus is provided with supporting rollers 11, 11 supporting a billet W, and a milling cutter 21 cutting the surface of the billet W on the supporting rollers 11, 11. The supporting rollers 11, 11 can make positive rotation and rotate the billet W in the peripheral direction, and the milling cutter 21 can make high speed rotation and cut the outer periphery of the billet W fed in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a billet surface cutting device which can be easily installed on a billet carry-in line in an extruder for manufacturing an extruded aluminum material.

[0002]

2. Description of the Related Art In order to produce a high-quality extruded material, the surface of a billet to be fed into an extruder is cut through a cutting device to remove oxide films and the like adhering to the surface and to remove surface scratches. May be modified. This is because the presence of these defects on the billet surface may degrade the quality of the extruded profile.

[0003] A conventional cutting device is configured in a lathe shape by combining a chuck mechanism for gripping an end of a billet and a cutting tool for cutting the surface of the billet. Therefore, the billet is gripped via a chuck mechanism, rotated at a high speed in the circumferential direction, and the cutting tool is moved in the axial direction while contacting the outer periphery of the billet, thereby cutting the billet surface to form an oxide film or the like. Can be removed.

[0004] It is assumed that the cutting device carries in and out the billet via a transfer device such as a loader device. The cutting device may hold both ends of the billet through a pair of front and rear chuck mechanisms, or may hold the billet through the chuck mechanism and a centering center. However, in the latter case, a center hole is formed in the billet axis.

[0005]

According to the prior art, the cutting tool has a problem in that cutting chips adhere to the cutting edge portion, resulting in poor durability and a need for cutting oil at the time of cutting. . Further, since the cutting device needs to carry in and out the billet through the transfer device, the entire configuration including the transfer device becomes large, and it is difficult to incorporate the billet into the billet carry-in line preceding the extruder. Above, it is necessary to leave a grip mark on the end of the billet by the chuck mechanism or to form a center hole in the billet, so the end of the billet must be cut off, and the effective use length of the billet is short. There was a problem that would be.

In view of the above-mentioned problems of the prior art, the object of the present invention is to easily realize sufficient durability without using a cutting oil by combining a milling roller with a support roller for supporting a billet. Another object of the present invention is to provide a billet surface cutting device that can reduce the size of the entire device and maximize the effective use length of the billet.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a support roller for supporting a cylindrical billet and rotating the same in a circumferential direction, and a milling machine for cutting the surface of the billet on the support roller. The gist is to provide

The cutting depth of the milling cutter can be set via a reference roller that comes into contact with the outer periphery of the billet, and the reference roller can be disposed before and after the milling cutter.

Also, a pusher for feeding the billet on the support roller in the axial direction can be provided, and the support roller can be formed such that the front portion has a larger diameter than the rear portion.

[0010] Further, a holding roller for holding the billet on the supporting roller may be provided.

[0011]

According to the structure of the invention, when the cylindrical billet is carried in the axial direction, the supporting roller can be rotated in the circumferential direction while supporting the billet, and the milling machine rotates in the circumferential direction. The entire surface of the billet can be cut to remove deposits such as oxide films on the billet surface. In addition, since the milling cutter has a large number of cutting edges on the outer periphery, the time during which each cutting edge contacts the billet surface can be minimized, and the billet surface can be cut at high speed without using cutting oil. be able to. However, at this time, it is preferable that the milling cutter be rotated at a speed much higher than the rotational speed of the billet in the circumferential direction. On the other hand, at least two support rollers are installed in parallel to support the billet, and the billet may be rotated in the circumferential direction by positively rotating the support roller, and may be circumferentially rotated by another rotating member. It may be rotated. Further, the milling cutter may be moved in the axial direction of the billet to cut the surface of the billet, or may be moved in the axial direction to cut the billet.

[0012] By setting the cutting depth via the reference roller, even when the billet is not formed in a correct cylindrical shape, the milling machine can cut the surface of the billet according to the billet shape at a predetermined cutting depth. Can be cut into pieces.

If the reference rollers are arranged before and after the milling, the reference rollers contact the uncut and cut portions of the billet, respectively, and can keep the milling depth constant and correct from the start to the end of cutting. it can. In addition, the front and rear referred to here are the side where the uncut billet is carried in along the axial direction of the billet, and the side where the cut billet is carried out is the front.

By pushing the billet on the support roller in the axial direction, the pusher can move the billet relative to the milling machine in the axial direction, without having to move the milling machine.

The support roller, which forms the front portion with a larger diameter than the rear portion, can support the uncut portion of the billet by the rear portion and support the cut portion by the front portion, so that the front portion of the billet is inclined downward. It is possible to obtain a good cutting state by the milling without the risk of being cut.

The pressing roller presses the billet on the supporting roller to prevent the billet from being accidentally vibrated on the supporting roller or the billet from being inadvertently rotated at a high speed by the milling machine. A stable cutting operation can be realized.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

The billet surface cutting device mainly includes support rollers 11 for supporting the billet W and a milling cutter 21 (FIGS. 1 and 2). However, the pusher 31, the transfer conveyor 40, and the pressing rollers 51, 51 are combined with the support rollers 11, 11, and the milling cutter 21.

Before and after the transfer conveyor 40, a conveyor C
A and CB are provided. 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 positively rotating drum-shaped rollers CB1, CB1,.... The conveyors CA and C
B is installed such that the respective transport surfaces are at the same height.

The transfer conveyor 40 includes a transport chain 41,
The guide rollers 42, 42,.
3 and disposed between the support rollers 11 and 11 (FIGS. 1 and 3). The conveyor frames 43, 43
It is connected via a channel-like reinforcing material 43a,
A guide rail 43b that slidably supports the lower traveling portion of the transport chain 41 is provided on the upper surface of the reinforcing member 43a. Further, the conveyor frames 43, 43 are cylinders 44, 44, which are erected on a base frame (not shown).
It is supported so as to be able to move up and down via a reinforcing member 43a.

Each of the guide rollers 42 has a large diameter flange 42a on the left and right sides thereof.
b, the flanges 42a, 42a are rotatably incorporated in the conveyor frames 43, 43 such that a part of the flanges 42a projects upward. The transport chain 41 is provided with guide rollers 42, 42 on the conveyor frames 43, 43.
.. Are wound around a drive sprocket 41b at the shaft end of the drive motor 41c via a tension sprocket (not shown).

The transfer conveyor 40 includes cylinders 44, 44.
Can be raised to the same height as the conveyors CA and CB (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 operates the drive motor 41c to rotate the transport chain 41 so as to rotate. Billet W
From the conveyor CA side to the conveyor CB side. Note that each guide roller 42 prevents the billet W on the transport chain 41 from falling down via the flanges 42a, 42a. Further, the transfer conveyor 40 can reduce the length of the cylinders 44 and 44 so that
The billet W descends between the support rollers 11 and 1
1 (solid line in the figure).

Stoppers 45, 45 are provided in the middle of the transfer conveyor 40. The stoppers 45, 45
It is vertically swingably mounted on both outer sides of the conveyor frames 43, 43 via a shaft 45a. Further, the stoppers 45, 45 are connected via a lower connecting rod 45b, and the connecting rod 45b is connected to the conveyor frames 43, 4
The rod 4 of the horizontal cylinder 45c attached to the lower part of 3
5c1. Therefore, the stoppers 45, 45
When the transfer conveyor 40 is lifted, the cylinder 45
c can be shortened and oscillated upward so that the leading end can protrude above the transfer conveyor 40 (two-dot chain line in FIG. 3), and when the transfer conveyor 40 descends, the cylinder 4
5c can be extended and rocked downward so that the leading end can be retracted to the same height as the conveyor frames 43, 43 (solid lines in FIGS. 1 and 3).

The transfer rollers 4 are supported by the transfer rollers 4.
On both sides of the upper part of 0, they are installed in parallel with each other.
Each support roller 11 has a rear part formed on the conveyor CA side with a diameter D1 and a front part formed on the conveyor CB side with a diameter D2> D1 (FIGS. 1 and 4), and stands on the base frame 12. It is rotatably supported by the support brackets 12a, 12a. Further, the support rollers 11 and 11 are provided with sprockets 11b and 11
b, the chain is wound around a tension sprocket 13a, a guide sprocket 13b, and a drive sprocket 13c, and is connected to a common drive motor 13d. Note that the sprockets 11b, 11b are mounted on one shaft end of the support roller 11 via lock nuts 11c, respectively. The support rollers 11, 11 can support the billet W (solid line in FIG. 3, FIG. 5), and are positively rotated in the same direction via a drive motor 13d and a chain 13 (arrows in FIGS. 3, 5). K1 and K1 directions), and the billet W can be rotated in the circumferential direction (the direction of arrow K2 in the figure).

Behind each support roller 11, a guide roller 14 is arranged 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 at the rear side, and is rotatably supported via a bracket 12 d on the base frame 12.

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 by a frame (not shown) via a shaft 25c so as to be vertically swingable, and a swing lever 25d protruding from one end of the shaft 25c is connected to an upward cylinder 25e. Therefore, the bracket 25 is mounted on the cylinder 2
5e is expanded and contracted and oscillated up and down, so that an operating position (solid line in FIG. 5) contacting the billet W on the support rollers 11 and 11 and a retracting position to retract above the billet W (two points in FIG. The milling cutter 21 can be moved between the dashed line and the dashed line.

Each of the bearings 25a and 25b has a bolt 2
Through 5a1, 25a1 and bolts 25b1, 25b1,
The bracket 25 is detachably mounted on the obliquely downward mounting surface of the bracket 25 (FIGS. 5 and 6). However, FIG. 6 shows only one bolt 25a1 and 25b1 respectively. Each of the bearings 25a and 25b has a drive shaft 22
Roller bearing type bearing 25 for rotatably supporting the roller
a2, 25a2, self-aligning bearing 25b2, 2
5b2, each bearing 25a2, 25
b2 is provided with oil seals 25a3 and 25b3, respectively. The bearing 25a has a chrysanthemum washer 22d.
1, bearing holder 22d via lock nut 22d
2 is installed, and the bearing holder 2 is mounted on the bearing 25b.
5b4 and a bearing cover 25b5 are incorporated.

A reference roller 23 and a milling cutter 21 are mounted on the drive shaft 22 between bearings 25a and 25b, a reference roller 24 is mounted in front of a front bearing 25b, and a sprocket 22e is mounted behind a rear bearing 25a. Is installed.

The milling cutter 21 is mounted on a drive shaft 22 via a key 22a.
a, 23a. Milling 2
1. A spacer 22b is interposed between the reference rollers 23. The reference roller 24 includes bearings 24a, 24
a to the drive shaft 22 and the lock nut 22
c, it is prevented from coming off via a spring washer 22c1 and a spacer 22c2. At the front end of the drive shaft 22 on the side of the reference roller 24, a prism portion 22c3 is formed via a male screw portion into which a lock nut 22c is screwed. The sprocket 22e is mounted on the drive shaft 22 via a key 22f, and is prevented from falling off via a chrysant washer 22e2 and a lock nut 22e1. The drive shaft 22 includes chains 22g, 22 wound around sprockets 22e, 26a.
g, it is connected to a drive motor 26 mounted on the bracket 25.

The milling cutter 21 has a large number of cutting edges 21 on its outer circumference.
a, 21a ... are formed. Rear reference roller 23
Is the cutting depth d ≒ (D2 -D1) / 2 from the milling cutter 21.
And the reference roller 24 at the front is
It has the same diameter as the milling cutter 21.

The pusher 31 is mounted forward on a movable base 33 via a swing bracket 32 (FIG. 1,
(Fig. 2). The moving base 33 includes sliders 33a, 33a.
..., upper and lower guide rails 34, 34 via a screw shaft 35
(FIGS. 2 and 5).
The guide rails 34, 34 are attached to a side frame (not shown). In addition, the moving base 33 includes
A screw member 33b screwed to the screw shaft 35 is provided. The screw shaft 35 is driven by a drive motor 35 via a sprocket 35a, a chain 35b, and a sprocket 35c at the tip.
d.

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, down, left and right by a predetermined angle. The swing bracket 32
It is vertically swingably supported by brackets 33d, 33d projecting from the movable base 33 via shafts 32b at the lower ends of the legs 32a, 32a (FIGS. 1, 5). The swing arm 32e protruding from the shaft 32b is
Is connected to an upwardly directed cylinder 36 mounted on the vehicle.

Therefore, the pusher 31 is driven by the drive motor 35.
By rotating the screw shaft 35 forward and reverse via d,
From behind the support rollers 11, 11, the support rollers 11, 11
Can be moved back and forth up to the middle portion (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 in the forward and reverse directions (in the direction of arrow K5 in FIG. 5). That is, the pusher 31 moves up and down between an operating position at the same height as the billet W on the support rollers 11 and 11 (dotted line in the figure) and a retracted position (not shown) sufficiently above the billet W. And

The front and rear pressing rollers 51, 51 are disposed above the supporting rollers 11, 11 so as to correspond to the reference rollers 23, 24 (FIGS. 1, 5). Each holding roller 51 is mounted on the tip of a pair of bell cranks 52, 52, and the other ends of the bell cranks 52, 52 are connected to a cylinder 53. In addition, bell crank 5
2 and 52 are connected to a bracket 52 via an intermediate shaft 52a.
b so as to be rotatable (FIG. 2). Therefore,
The pressing rollers 51, 51 can extend the cylinder 53 to press the billet W on the supporting rollers 11, 11 (solid line in FIG. 5), and can shorten the cylinder 53 to retract upward (2 in FIG. 5). Chain line).

The billet surface cutting device operates as follows.

The milling cutter 21 and the reference rollers 23 and 24
It is raised to the retracted position via the cylinder 25e, and the press rollers 51, 51 are retracted upward via the cylinders 53, 53 (two-dot chain line in FIG. 5, FIG. 7A). The pusher 31 is retracted via the screw shaft 35 (FIG. 2), and is retracted upward via the cylinder 36. Further, the transfer conveyor 40 is raised via the cylinders 44, 44, and the transport chain 41 is rotated and driven via the drive motor 41c.
45 is projected upward.

Therefore, the rollers CA1, C of the conveyor CA
When A1... Are positively rotated, the billet W on the conveyor CA is fed onto the transfer conveyor 40 (in the direction of arrow K6 in FIG. 7A), and the tip ends below the reference roller 23 via stoppers 45, 45. (A two-dot chain line in FIGS. 2 and 7A). Note that billet W
Is transferred to the transfer conveyor 40 via the guide rollers 14 and 14.
Are correctly guided on the guide rollers 42, 42,... (Two-dot chain line in FIG. 3).

Thereafter, the transport chain 41 is stopped, the stoppers 45, 45 are retracted downward, and the transfer conveyor 40 is stopped.
Is lowered, so that the billet W is supported by the support rollers 1.
It is transferred to the rear part of 1 and 11 (solid line in FIG. 3). Next, the billet W is pressed down toward the support rollers 11 by lowering the rear press roller 51 via the cylinder 53 (solid line in FIG. 5, FIG. 7B), and the billet W is 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.

Subsequently, the milling machine 21 is rotated via the drive motor 26, and the billet W is rotated in the circumferential direction via the drive motor 13d and the support rollers 11, 11, and the pusher 31 is advanced to move the billet W on the shaft. (In the direction of arrow K7 in FIG. 7B), the milling cutter 21
The outer periphery of the billet W sent in the axial direction while rotating in the circumferential direction can be spirally cut by the cutting depth d (FIG. 7C). At this time, the support rollers 11, 11
Supports an uncut portion at the rear of the billet W with a rear portion having a diameter D1 (FIG. 4), and a cut portion at the front has a diameter D2 ≒ 2.
The support by the front part of d + D1 prevents the billet W from inadvertently tilting. Also, reference roller 2
3 can keep 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.

When the billet W advances and the cut portion comes into contact with the reference roller 24, the front pressing roller 51 is lowered via the cylinder 53, and the billet W is pressed together with the rear pressing roller 51 (FIG. 7 ( C)). Therefore, when the rear end of the billet W passes the position of the reference roller 23 (two-dot chain line in FIG. 4), the reference roller 24 may 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.

When the surface cutting of the billet W by the milling cutter 21 is completed, the milling cutter 21, the reference rollers 23, 24,
The pressing rollers 51, 51 are retracted upward (FIG. 7).
(D)), the support rollers 11, 11 and the milling cutter 21 are stopped. Further, the pusher 31 is retracted and retracted upward, and the stoppers 45, 45 are erected to position a cutting start position of the next billet W. Then, the transfer conveyor 40 is raised to rotate the transport chain 41, and the rollers CB1, CB1... Of the conveyor CB are positively rotated so that the billets W cut on the support rollers 11, 11 are placed on the conveyor CB. The billet W can be discharged from the conveyor CA by repeating the same operation.
... can be sequentially cut and discharged onto the conveyor CB.

In the above description, the billet W is not fed in the axial direction via the pusher 31,
May be moved in the axial direction of the billet W. Further, instead of raising and lowering the transfer conveyor 40, the support rollers 11,
11 may be raised and lowered. The billet W is rotated in the circumferential direction via a rotating member such as another roller or a belt, instead of positively rotating the support rollers 11 and 11 to rotate in the circumferential direction, so that the support rollers 11 and 11 are driven. It may be rotated.

[0043]

As described above, according to the present invention, a support roller for supporting a billet and rotating in the circumferential direction and a milling cutter for cutting the surface of the billet on the support roller are combined. Does not form gripping marks at the end of the billet, the milling machine can smoothly cut the billet surface at high speed without using cutting oil, and improves the durability of the cutting edge Therefore, there is an excellent effect that the effective use length of the billet can be maximized, and the entire apparatus can be miniaturized and easily incorporated into the billet carrying line in the extruder.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the entire configuration.

FIG. 2 is a plan view of the entire configuration.

FIG. 3 is an enlarged sectional explanatory view corresponding to an arrow XX in FIG. 2;

FIG. 4 is an explanatory side view showing an enlarged main part.

FIG. 5 is an explanatory front view of a main part.

FIG. 6 is an enlarged sectional view of a main part.

FIG. 7 is an explanatory diagram of an operation.

[Explanation of symbols]

 d: Cutting depth W: Billet 11: Support roller 21: Milling 23, 24: Reference roller 31: Pusher 51: Pressing roller

Claims (6)

[Claims] 1. A billet surface cutting device comprising: a support roller that supports a cylindrical billet and rotates in a circumferential direction; and a milling machine that cuts the surface of the billet on the support roller. 2. The billet surface cutting device according to claim 1, wherein the milling cutter sets a cutting depth via a reference roller that comes into contact with an outer periphery of the billet. 3. The billet surface cutting device according to claim 2, wherein the reference roller is disposed before and after the milling cutter. 4. The billet surface cutting apparatus according to claim 1, further comprising a pusher for feeding the billet on the support roller in an axial direction. 5. The billet surface cutting device according to claim 4, wherein the support roller has a front portion formed to have a larger diameter than a rear portion. 6. The billet surface cutting device according to claim 1, further comprising a pressing roller for pressing the billet on the supporting roller.