JP2000005917A - Device and method for reducing end mark of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device reducing, through beveling, end marks generated on a metallic plate at the interlayer transition part of a winding layer when the metallic plate is coiled. SOLUTION: A plurality of end mills 20 are arranged in parallel on a metallic plate conveying line along the cross direction of the line, and the end mills 20 each given a predetermined elevation angle are lowered from an upper waiting point and further fed transversely to cut a single bevel groove Sa at the end of the metallic plates which serves as a winding starting end. The end mills 20 should be spiral end mills, some of which are rotated counterclockwise while the remaining end mills are rotated clockwise. Further, those end mills which machine both sides of the metallic plate are made to cut through the metallic plate S from the upper surface to the side faces thereof. Cutting is stabilized and the desired bevel can be formed while avoiding the splashing of chips.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention effectively reduces end marks generated at the transition between the second and subsequent winding layers due to the influence of the thickness of the metal plate when the metal band is wound around a coil. The present invention relates to an end mark reducing device and an end mark reducing method.

[0002]

2. Description of the Related Art A strip-shaped metal plate such as a non-ferrous metal plate or a steel plate (hereinafter, simply referred to as a metal plate) is rolled or surface-treated and rolled as shown in FIG. Due to the winding, a plastic deformation called an end mark K occurs in the metal plate S. The end mark K is generated at the transition portion of the winding layer (the portion overlapping with the winding start end) because the winding radius is increased by an amount corresponding to the plate thickness. FIG. 10 (b)
Is an unwound state of the metal plate S, and the end mark K remains. The end mark K is cut off when the metal plate is used as a defective portion. In the case of a cold-rolled steel sheet having a thickness of 3 to 3.0 mm, it may be nearly 10% of about 20 TONs per coil, and the yield of the product is very poor.

Therefore, as a measure for reducing the end mark K,
A method is used in which a groove is formed in a rubber sleeve to be placed over the winding core of the winding machine 5 and a winding start end of a metal plate is dropped into the groove to reduce a step at an interlayer transition portion of the coil. In addition, it is difficult to adjust the rotation stop position of the winding machine, which hinders automatic winding.

[0004]

As shown in FIG. 9, the step at the transition between the layers of the coil can be reduced also by a method of processing a groove-shaped groove Sa at the start end of the metal plate S. According to the method, the end mark can be reduced without adjusting the rotation stop position of the winding machine. However, the end mark reduction method by the groove processing involves the following problems.

[0005] As a method of forming a groove on the winding start end of a metal plate flowing from a preceding processing line, the first method that can be conceived is as follows.
Grinding with a grindstone.

[0006] However, in the grinding, chips are scattered remarkably to the surroundings, and the chips deteriorate the quality of the product and the working environment and adversely affect the smooth operation of the processing line.

As another method, beveling with a milling cutter is conceivable. However, machining with a single cutter requires a long machining time, and unbalanced force acts on the metal plate in normal cutting to form the metal plate. Because it moves, stable processing cannot be expected. Furthermore, this method also causes significant chip scattering.

[0008] Under such circumstances, the end mark reduction method by groove processing has not been put to practical use.

An object of the present invention is to provide an end mark reduction device and an end mark reduction method which can perform a beveling process without causing the above-mentioned inconvenience at the leading end of a metal plate serving as a winding start end. .

[0010]

SUMMARY OF THE INVENTION An end mark reducing device provided by the present invention is arranged in a direction opposite to a traveling direction of a metal plate and in a posture having a predetermined elevation angle, and is arranged in the line width direction in the middle of a metal plate conveying line. A plurality of end mills, a rotary drive mechanism of the end mill, an elevating mechanism for moving the end mill up and down including this rotary drive mechanism, and a traverse mechanism for moving the end mill right and left, and the tip was positioned near the end mill. It is provided with a clamp device for fixing the metal plate on the support frame, and a control unit for controlling the rotation, elevation, and traverse of the end mill, and lowers the end mill from a standby point on the transport line, and further traverses the end mill. Thus, a groove at a predetermined angle is cut at the tip of the metal plate supported by the support frame.

In this apparatus, the end mills are divided into two groups, the first group of end mills are rotated clockwise, the second group of end mills are rotated counterclockwise, and the end mills for processing both sides of the metal plate are made of metal. Preferably, the plate is cut out from the upper surface to the side surface. It is even more preferable to employ a reverse twist spiral end mill as the clockwise end mill and the counterclockwise end mill.

Further, the end mill, the rotary drive mechanism, the elevating mechanism, the clamp device,
A support frame is attached to form the main body, a forward / backward feed mechanism that moves the main body in the direction of travel of the metal plate, and a means for detecting the amount of excessive movement of the metal plate from the target stop point are added. It is also preferable that the front-rear direction feed mechanism is driven based on the detection signal of the means, and the main body is advanced to a position where the relative positional deviation with respect to the metal plate becomes zero, thereby positioning the tip of the metal plate.

Furthermore, since the appropriate value of the groove angle changes depending on the material and thickness of the metal plate, it is effective to provide a groove angle adjustment mechanism.

In addition, there are a preferable configuration for collecting chips and a preferable configuration for smoothly flowing the metal plate after the groove processing toward the winding machine.
This will be described in the section of the embodiment.

According to the method of the present invention, a groove is formed on the tip of a metal plate which has been positioned relative to the end mill using the plurality of end mills described above, and thereafter, the tip with the groove is formed. Is a winding start end, and the metal plate is wound into a coil shape by a winder. When the groove amount (groove gradient) in this method is about 2/30 to 1/50 (unit: mm / mm), the effect of end mark reduction is particularly remarkable.

[0016]

Since the edge of the end mill having a predetermined angle is cut into the tip of the metal plate to cut the groove, the scattering of chips is suppressed as compared with the processing using a grindstone or a milling cutter. In addition, since a plurality of end mills arranged in parallel are used to share the area to be machined, the machining balance is not significantly impaired, and stable machining can be expected. In addition, the lateral feed amount of the tool may be small, and the machining time is shortened.

When the end mills are divided into two groups and the end mills of each group are rotated in the opposite direction, the cutting balance by the clockwise end mill and the counterclockwise end mill cancel each other out, so that the cutting balance is not particularly disrupted. If the end mills of each group are spiral end mills with reverse twist, the impact at the time of biting can be suppressed, so that the cutting balance is further improved. In addition, the end mill that processes both sides of the metal plate cuts out from the top surface to the side surface of the metal plate, so that no turning force acts on the metal plate, which ensures that the movement during the processing of the metal plate is ensured. Is prevented and processing stability is maintained.

Further, in the case where the main body can be moved back and forth, the relative positional deviation between the main body and the metal plate can be corrected by the displacement of the main body, so that the groove processing is executed without error.

In addition, the one that can adjust the groove angle can cope with the change of the optimum groove angle due to the thickness of the metal plate and the like, and the applicable range of the apparatus is expanded.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the apparatus according to the present invention. This end mark reduction device 1 is incorporated in a transport line of a metal plate S as shown in FIG. In the figure, reference numeral 2 denotes a pinch roll, 3 denotes a shear for cutting, and the device 1 of the present invention is disposed between the shear 3 and the deflector roll 4. Reference numeral 5 denotes a winding machine that winds up the processed metal plate S.

The end mark reducing device 1 has a structure in which the main body 10 shown in FIG.

The main body 10 is integrally provided with a support frame 12a for supporting a metal plate from below under a gate-shaped frame straddling a transport line, and further, a square frame 12 having a carrying table 30 mounted behind the support frame. The corner frame 12 is movably mounted on guide rails 11b supported on a base 11a and arranged on both sides of a transport line. The feed by the feed mechanism 11 is performed by the servo motor 1
1c. The servo motor 11c rotates the pinion gear 11e meshing with the rack 11d on the side of the base 11a, whereby the main body 10 moves forward and backward in the longitudinal direction of the line.

At the front of the square frame 12, there is provided a detection unit 13 (see FIG. 3) for detecting the metal plate S. The detection unit 13 detects that the metal plate S has entered the main body 10 due to light transmission between the light projector 13a and the light receiver 13b being interrupted by the metal plate, and sends a signal to a control unit 40 described later. .

An elevating mechanism 14 is provided inside the square frame 12.
The lifting frame 15 driven by the motor is provided.
The elevating mechanism 14 guides both sides of the elevating frame 15 with vertical guides 14 a provided facing the inner surface of the square frame 12, and lifts the elevating frame 15 with a hydraulic cylinder 14 b driven by a hydraulic unit 16 on the square frame 12. Raise and lower.

Below the elevating frame 15, a transverse feed mechanism 18 of a cutting unit 17 to be described later is provided. As shown in FIGS. 3 and 4, the traverse mechanism 18
A slide guide 18a in the width direction of the transfer line is attached to the lower surface of the lifting frame 15, and the movable block 19 suspended from the slide guide 18a is moved to the transfer cylinder 18b shown in FIG.
Push and pull with to move left and right. The feed amount by the lateral feed mechanism 18 is equal to or larger than the arrangement pitch of the end mills described later.

The cutting unit 17 is provided below the movable block 19, as shown in FIGS. This cutting unit 17 has a cutter frame 17a attached to the movable block 19, and the frame 17a
A plurality of spindles (not shown) arranged at a constant pitch in the width direction of the transport line, a plurality of motors 17b for rotating the spindles, and a power transmission element 17c from the motor to the spindles (see FIG. 2; (Using a bevel gear), and an end mill 20 is mounted on each of the chucks 17d (FIG. 4) at the tip of each spindle to form the cutting unit 17.

The cutting unit 17 has a groove angle adjusting mechanism 21. As shown in FIG. 4, the groove angle adjusting mechanism 21 rotatably couples the front side of the cutter frame 17 a to the movable block 19 with a horizontal hinge pin 21 a using the pin as a fulcrum, and suspends the cutter frame 17 a from the movable block 19. Adjusting bolt 21b passed through a hole in cutter frame 17,
Nut 21c screwed to the bolt, cutter frame 1
The end mill 2 is operated by operating the turning amount adjusting portion at the rear portion of the cutter frame, which includes a stopper bolt 21d for stopping the movement of the end mill 2a.
The elevation angle of 0, that is, the angle of the groove to be machined is changed.

The end mill 20 is divided into two groups, one of which rotates clockwise and the other of which rotates counterclockwise. Also, here, a reverse twist spiral end mill is employed as the clockwise end mill and the counterclockwise end mill. In this end mill, it is desirable to divide a clockwise counterclockwise and counterclockwise counterclockwise approximately in half in terms of cutting balance. The end mills that rotate in the reverse direction may be arranged alternately as shown in FIG. 8, or those that turn clockwise on one side and those that turn counterclockwise on the other side may be solidified and arranged.

In FIG. 4, reference numeral 22 denotes a cutter cover attached to the front of the cutter frame 17a. End mill 2
A pneumatic ejection nozzle 23 for blowing chips toward the rear side of the end mill is provided in front of 0, and a dust cover 24 for chip recovery is provided below the end mill 20.

The driving force from the cylinder 25 is transmitted via the links 26 and 27 to the dust cover 24 and moves from the retreat point to the closed position (the position shown in FIG. 4). This dust cover 24
Under the condition of FIG. 3 in which the end mill 20 is raised, the chips adhered to the end mill 20 are prevented from dropping onto the metal plate during transportation, and are further blown off by air at the closed position in FIG. This prevents the chips from flowing toward the roller conveyor 31 and guides the received chips to a collecting tray (not shown) below the transport line. This prevents the chips from scattering and sticking to the metal plate, and does not adversely affect the quality of the metal plate or the operation of the run.

The lifting frame 15 has a cutting unit 17
Is mounted at the front of the device. The clamp device 28 has a structure in which an arm 28a and a guide rod 28b supported by the arm 28a are provided below the lifting frame 15, and a pressing plate 28d is attached to a lower end of the guide rod 28b urged downward by a spring 28c. The metal plate S, which is lowered together with the elevating frame 15 and positioned, is pressed and fixed on the support frame 12a prior to processing by the end mill 20.

After the pressing plate 28d is pressed onto the metal plate S, the elevating frame 15 is further lowered. During this time, the spring 28c is compressed, and the arm 28a and the guide rod 28b slide relatively.

A metal plate S is provided on the support frame 12a.
Is provided. Metal plate S
Does not stop immediately even if the transport is stopped after confirming the entry into the main body 10, and passes the target stop point. The tip position detection device 29 is provided to correct a relative displacement between the main body 10 and the tip of the metal plate due to the over-movement. As shown in FIGS. 5 and 6, this detecting device 29 has a movable plate 29c attached to the tip of a guide rod 29b guided by a bush 29a, and both sides of the movable plate 29c are moved toward the support frame 12a by a tension spring 29d. I'm attracted. A rotary actuator 29e is attached to the center of the movable plate 29c, and the output shaft of the actuator is provided with a plate-like stopper 29 that extends along the rear edge of the support frame 12a.
f is attached. Further, there is provided an encoder 29h that operates by transmitting the movement of the moving plate 29c by a wire 29g.

When the moving metal plate S hits the stopper 29f and pushes it, the detecting device 29
c extends the spring 29d and moves together with the metal plate S, and an electric signal corresponding to the amount of movement is transmitted to the encoder 29h.
Is output to the control unit 40 from the controller. The control unit 40 drives the servomotor 11c based on the signal to move the main body 10 by the same amount as the movement distance detected by the encoder 29h. Therefore, the front end of the metal plate S is correctly positioned on the rear edge of the support frame 12a. Positioning is performed, and groove processing by the end mill 20 is reliably performed.

When the metal plate S stops, the stopper 2
9f is rotationally driven by the rotary actuator 29e to move to a retreat point allowing passage of the metal plate, and the movable plate 29c is returned by the force of the spring 29d.

Reference numeral 30 in FIG. 3 denotes a carrying table disposed behind the support frame 12a.
Is guided on a roller conveyor 31 at the subsequent stage. The carrying table 30 is retracted to a position where it does not hinder the lowering of the cutting unit 17 by rotating a support shaft 33 connected to the cylinder via a chain sprocket and a bevel gear by a cylinder 32 shown in FIG. Let it. The roller conveyor 31 is provided for the purpose of stably feeding the metal plate S after the groove processing toward the winding machine. Since the conveyor 31 also hinders the cutting unit from descending, the elevating frame 15
To be lowered together with the lifting frame 15. Reference numeral 31a in FIG. 3 denotes a lifting guide for the roller conveyor 31 including a bush and a guide rod.

Reference numeral 34 in FIG. 2 denotes a safety lock mechanism. The mechanism 34 includes a cylinder 34 mounted on the square frame 12.
The rod a is inserted into a hole (not shown) provided in the elevating frame 15 to prevent the elevating frame 15 from lowering naturally.

The control unit 40 shown in FIG.
3 and a signal from the metal plate tip position detecting device 29, and controls the movement of the end mark reducing device 1 according to a control program stored in advance.

Referring to FIG. 11, a description will be given of the procedure of the groove machining performed based on the control program. When a cutting signal of the metal plate S is received from the shear 3 in FIG. 1, a series of operations for beveling starts. Then, when the detection unit 13 detects that the metal plate S has entered the main body unit 10, the processing shifts to the cutting mode.

In this cutting mode, the lifting frame 15 is first lifted by the hydraulic cylinder 14b,
When the top dead center is reached, the lock by the safety lock mechanism 34 is released, and the lifting frame 15 can be lowered.

At the same time, the stopper 29f of the detection device 29 is moved from the retreat point to the detection point, and stops at the position where the metal plate S hits the stopper 29f and overruns. The amount of over-movement of the metal plate S from the stop target point due to the overrun is detected by the encoder 29h when the moving plate 29c is pushed and moved together with the stopper 29f, and the main body 10 is over-moved by the command from the control unit 40. The main body 10 is moved forward by the same amount as that of the main frame 10 at a position where the rear edge of the support frame 12a is aligned with the front end of the metal plate. When the positioning is completed, the stopper 29f is retracted, and the dust cover 24 is moved to the closing point. When all the above operations are completed, a signal flows from the AND circuit, and the next operation, namely, the rotation of the end mill 20, the lifting frame 15 down,
Air blowing from the pneumatic injection nozzle 23 starts, and the metal plate S is clamped by the clamp device 28 while the elevating frame 15 is descending. In addition, the transport table 30,
The roller conveyor 31 is also retracted, and then the elevating frame 15 is further lowered, and the end mill 20 is cut into the tip of the metal plate S. When the lifting frame 15 reaches the bottom dead center, the end mill 20 is moved by a predetermined amount (for example, 200 m).
m) Lateral feed completes the beveling.

Thereafter, the raising / lowering frame 15 is raised by the end signal of the lateral feed, and furthermore, the end mill 20 is returned to the origin, the main body 10 is returned to the origin, the lifting frame 15 is fixed by the safety lock mechanism 34, and the dust cover 24 is returned. Are performed in parallel, and one cycle of processing is completed as described above.

[0043]

As described above, according to the apparatus and method of the present invention, a plurality of end mills are arranged in parallel with a predetermined elevation angle, and a groove is formed at the end of a metal plate by the end mills. In addition, stable processing and rapid processing can be expected, chip scattering is suppressed, and the end mark of the coil can be reduced by groove processing.

In particular, those in which the end mills are divided into two groups and turned in the reverse direction, those in which a spiral end mill having a reverse twist is employed, and those in which the end mill for side processing is cut out from the upper surface of the metal plate to the side surface, have a cutting balance. egoism,
Even a thin metal plate wound by a coil can be processed without any trouble.

A mechanism provided with a forward / backward feed mechanism for the main body and a means for detecting the amount of over-movement of the metal plate from the target stop point (= the amount of relative positional deviation between the main body and the metal plate) is provided. Can accurately position the tip of the metal plate,
Processing defects due to misalignment are prevented.

Further, those having a mechanism for adjusting the groove angle include:
The range of equipment can be expanded.

[Brief description of the drawings]

FIG. 1 is a diagram showing installation points in a rolling line of a device of the present invention.

FIG. 2 is a front view of the apparatus according to the embodiment.

FIG. 3 is a partially cutaway side view of the above device.

FIG. 4 is an enlarged side view, partially broken away, of a main part of the above device

FIG. 5 is a plan view of a metal plate tip detection device.

FIG. 6 is a side view of the detection device of the above.

FIG. 7 is a front view showing a part of the carrying table;

FIG. 8 is a perspective view showing a cutting state of the end mill.

9A is a view showing a winding state of a grooved metal plate, and FIG. 9B is a perspective view of the same metal sheet being unwound.

FIG. 10 (a) is a diagram showing a winding state of a metal plate having an end mark, and FIG. 10 (b) is a perspective view showing a rewinding state of the metal plate.

FIG. 11 is a diagram showing a procedure of groove processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 End mark reduction device 2 Pinch roll 3 Shear 4 Deflector roll 5 Winder 10 Main body 11 Front-rearward feed mechanism 11a Base 11b Guide rail 11c Servo motor 11d Rack 11e Pinion gear 12 Square frame 12a Support frame 13 Metal plate detector 13a Light emitter 13b Receiver 14 Lifting mechanism 14a Vertical guide 14b Hydraulic cylinder 15 Lifting frame 16 Hydraulic unit 17 Cutting unit 17a Cutter frame 17b Motor 17c Power transmission element 17d Chuck 18 Lateral feed mechanism 18a Slide guide 18b Transfer cylinder 19 Movable block 20 End mill 21 Open end Angle adjustment mechanism 21a Hinge pin 21b Adjustment bolt 21c Nut 21d Stopper bolt 22 Cutter cover 23 Pneumatic injection nozzle 24 Dust cover 25 Cylinder 26, 27 Link 28 Clamping device 28a Arm 28b Guide rod 28c Spring 28d Pressing plate 29 Tip position detecting device 29a Bush 29b Guide rod 29c Moving plate 29d Spring 29e Rotary actuator 29f Stopper 29g Wire 29h Encoder 30 Transport table 31 Roller conveyor 31a Elevating guide 32 Cylinder 33 Support shaft 34 Safety lock mechanism 34a Cylinder 40 Control unit S Metal plate Sa Re-groove K End mark

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Lee In-ho 1 Goesong-dong, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea F-term (reference) 3F022 AA02 AA08 AA09 AA10 DD08 DD11 DD15 DD19 KK03 KK06 KK28 QQ05 QQ07

Claims (8)

[Claims] An apparatus for forming a bevel for reducing end marks on a tip end of a strip-shaped metal plate wound with a coil, wherein the metal plate is set in a direction opposite to a traveling direction of the metal plate and at a predetermined elevation angle. A plurality of end mills arranged in parallel in the line width direction in the middle of the transport line, a rotation drive mechanism of the end mill, a lifting mechanism for moving the end mill up and down including this rotation drive mechanism, and a lateral feed mechanism for moving the end mill left and right, A clamp device for fixing a metal plate whose tip is positioned near the end mill on a support frame, and a control unit for controlling rotation, elevation, and lateral feed of the end mill are provided. The end mark of the coil is lowered from the point, and further cuts a groove at a predetermined angle at the tip of the metal plate supported by the support frame by being fed sideways. apparatus. 2. The end mill is divided into two groups, the first group of end mills is rotated clockwise, the second group of end mills is rotated counterclockwise, and the end mill for processing both sides of the metal plate is formed of a metal plate. The coil end mark reduction device according to claim 1, wherein the device is cut out from the upper surface to the side surface. 3. The coil end mark reduction device according to claim 3, wherein the end mill is a spiral end mill, and the twisting directions of the clockwise end mill and the counterclockwise end mill are reversed. 4. A main body is formed by attaching the end mill, a rotary drive mechanism, an elevating mechanism, a clamp device, and a support frame to a square frame straddling a transport line, and a front-rear direction feed for moving the main body in the traveling direction of the metal plate. A mechanism and a means for detecting the amount of overtravel of the metal plate from the target stop point are added, and the longitudinal feed mechanism is driven based on the detection signal of the detection means, and the main body is displaced relative to the metal plate. 2. The coil end mark reduction device according to claim 1, wherein the end of the metal plate is positioned by moving the tip of the metal plate to a position where the value becomes zero. 5. A cutter frame for supporting an end mill and a rotary drive mechanism of the end mill, a horizontal hinge pin and a cutter frame for rotatably connecting a front side of the cutter frame to a lower portion of a movable block traversed by a traverse mechanism. 2. The coil end mark reduction device according to claim 1, further comprising a groove angle adjustment mechanism including a rotation amount adjustment unit. 6. The coil end according to claim 1, further comprising: a pneumatic injection means for blowing chips from a tip side to a rear side of the end mill; and a dust cover for guiding the blown chips downward. Mark reduction device. 7. A roller conveyor for conveying a metal plate behind the support frame, and an elevating mechanism for releasing the roller conveyor downward when the end mill is lowered.
An end mark reduction device for a coil as described in the above. 8. A plurality of end mills arranged in a line width direction in the middle of a metal plate conveying line in a direction opposite to a traveling direction of a metal plate and at a predetermined elevation angle, relative positioning with respect to the end mills. The end of the coil, characterized in that a beveling process is applied to the tip of the metal plate on which the metal plate has been made, and thereafter, the metal plate is wound into a coil shape with a winder, with the tip having the groove being the starting end. Mark reduction method.