JPH0455823B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to rewinding a steel plate into a coil shape (hereinafter referred to as recoil) from which a steel plate has been unwound from a steel plate coil and whose end scrap has been cut off by a shearing machine.
The present invention relates to a steel plate tip cutting device for chamfering the winding tip edge of a steel plate.

(Prior art) When supplying steel plates to customers, the steel plates are unwound from a steel plate coil, the end scrap is cut off, and then the steel plates are recoiled and supplied. There are many known methods for winding the steel plates. It is being As an example, as shown in FIG. 4, when recoiling a steel plate b on a mandrel a, a permanent deformation part d is generated in the steel plate b due to a step on the winding tip surface c.
In particular, where the winding diameter is small, the permanently deformed portions d are discontinuous at short intervals, making it impossible to perform sufficient stripping, so they are unwound from the steel sheet coil and removed as scrap. The length of this scrap can be as long as 60 m, and its weight varies depending on the plate thickness, but it can reach up to 2000 kg per coil at most, which significantly reduces the yield of steel plates. Therefore, as a countermeasure to this problem, as shown in FIG.
As shown in the figure, a method has conventionally been adopted in which a step g corresponding to the thickness of the steel plate b is formed in advance on the core metal a.

However, according to the method shown in FIG. 5, there are problems in that the finish accuracy of chamfering is poor and workability is poor. Further, according to the method shown in FIG. 6, it is necessary to manufacture a separate mandrel a for each different thickness of the steel plate b, resulting in an increase in cost.

Therefore, as disclosed in Japanese Utility Model Application Publication No. 56-131911, a cutting device has been proposed which can chamfer the winding tip edge of a steel plate with good workability on the winding line of the steel plate.

(Problems to be Solved by the Invention) However, since the above proposal is newly installed on the steel plate winding line, the entire line becomes longer and larger, and the leading edge of the steel plate must be chamfered. This could not be done automatically.

The present invention has been made in view of the above points, and can be easily and compactly attached to an existing shearing machine, and can be easily and compactly installed on the tip edge of the steel plate regardless of the deviation of the stopping position of the steel plate or the thickness of the steel plate. An object of the present invention is to provide a steel plate tip cutting device that can automatically perform chamfering.

(Means for Solving the Problem) In order to achieve the above object, the solution of the present invention fixes the tip of the workpiece to the workpiece exit side of the mount of a shearing machine that cuts a steel plate fed from a steel plate coil. The present invention includes a clamping device for chamfering the leading edge of the workpiece, a cutting device for chamfering the leading edge of the workpiece, and a support device for supporting the cutting device. The clamping device includes a tip sensor that is rotatable in the vertical direction on the pedestal of the shearing machine and detects the front end surface of the workpiece in order to stop feeding the workpiece, and a tip sensor that is installed on the pedestal of the shearing machine so as to be movable up and down. It includes a clamp member that presses and fixes the leading end of the workpiece whose feeding has been stopped from above. The support device includes an upper support table that is provided on a base fixed to the shearing machine frame so as to be movable laterally in a direction perpendicular to the traveling direction of the workpiece, and an upper support table that is provided on the lower surface of the upper support table so as to be movable up and down. It comprises an intermediate support stand and a lower support stand movably provided on the lower surface of the intermediate support stand in parallel to the workpiece running direction. The cutting device has a cutter that is driven by a motor and has a cutting cutter for chamfering the leading edge of the workpiece, and is provided on the lower surface of the lower support base with the cutter center line inclined by the chamfering angle with respect to the workpiece traveling direction; The cutting machine is provided oppositely to the lower part of the cutter, and has an inverted L-shaped cross-sectional shape having mutually orthogonal legs that can come into contact with the top surface and the tip surface of the tip of the workpiece, and has a central corner with an outer periphery of the cutter. a guide member having a cutout hole formed therein for protruding a part thereof and guiding lateral movement of the cutting machine along the upper surface and the tip surface of the workpiece tip by the inner surfaces of the two legs; a guide roller that clamps the leading edge of the workpiece between the cutter protrusion protruding from the cutout hole; and a guide roller that is movable up and down on the lower surface of the lower support base and that stops the lateral movement of the upper support base. and a side edge sensor that detects the side edge surface.

(Operation) The operation of the above means is as follows: First, when the tip of the steel plate (workpiece), which is partially unwound from the steel plate coil, passes through the space opposite the shearing blade of the shearing machine and reaches the workpiece exit side, The tip sensor detects the tip surface of the workpiece, stops the feeding operation of the workpiece, positions the tip surface of the workpiece, and then rotates upward to retreat from the lateral movement position of the cutting machine, which will be described later. At the same time, the clamp member descends to press and fix the tip of the workpiece. Next, the upper support table moves laterally to move the cutting device laterally, and when the side edge sensor descends and detects one side edge surface of the tip, the upper support table is stopped after a certain period of time by a timer. Stop the cutting device at an appropriate position for the next operation. First, the guide member of the cutting machine is lowered by lowering the intermediate support base, and the lower surface of one leg of the guide member is pressed against the upper surface of the tip of the workpiece. At the same time, the lower support base moves toward the workpiece and presses the inner surface of the other leg of the guide member against the front end surface of the workpiece. Subsequently, the guide roller rises and clamps the leading edge of the workpiece between it and the outer periphery of the cutter of the cutting machine. Next, the upper support base moves laterally to move the cutting device laterally, and the cutter is driven. The cutting machine chamfers the leading edge of the workpiece at a predetermined chamfering angle while moving laterally along the leading edge of the workpiece using a guide member. When the cutting machine approaches the other side edge of the leading edge of the workpiece, the side edge sensor detects the side end face. is detected, and the upper support base is stopped once a certain period of time has elapsed using a timer. This allows the cutting machine to thoroughly chamfer the entire width of the leading edge of the workpiece, after which the cutter stops. Subsequently, the guide roller, lower support stand, and intermediate support stand return to their original positions to remove the cutter and guide member from the leading edge of the workpiece, and the side edge sensor further descends to maintain the original detection distance. Next, the upper support table moves laterally in the opposite direction to the above, and when the side edge sensor detects one side edge surface of the tip of the workpiece, the timer stops after a certain period of time and the side edge sensor returns to its original position. Rise. As a result, the cutting device returns to its original state. Finally, the clamp member rises to release the tip of the workpiece. In this way, the workpiece whose leading edge has been chamfered is fed out to a desired length, recoiled, and then cut by a shearing knife.

(Example) Hereinafter, one example of the present invention will be described based on the drawings.

1 and 2 show a steel plate tip cutting device 1 of this embodiment. The steel plate tip cutting device 1 is provided on the workpiece outlet side of the pedestal 2a of the shearing machine 2, and includes a clamp device 3 and a cutting device 5 supported via a support device 4 and chamfering the tip edge of the workpiece. It becomes.

The shearing machine 2 has a pair of upper and lower shearing blades 2b, 2.
This is a device that cuts a steel plate (hereinafter referred to as a workpiece) W fed from a steel plate coil (not shown) by c.

The clamp device 3 includes a clamp member 6 and a tip sensor 7. The clamp member 6 is a rod-shaped member with a groove-shaped cross section, and is movable up and down through two drive cylinders 6b (one of which is not shown) on a clamp frame 6a fixed to the pedestal 2a, and is attached to the workpiece W. The clamp frame 6a is suspended perpendicularly to the running direction (direction of the arrow in FIG. 2).
a plurality of guide cylinders 6c interposed between
Guided by. The tip sensor 7 is a sensor such as a so-called proximity switch, and is attached to the tip of one arm 7b of two arms 7b and 7c that are rotatably supported vertically on a bracket 7a fixed to the pedestal 2a. It is installed, detects the tip end face of the workpiece fed from the steel plate coil, and outputs a feeding stop signal to the workpiece feeding means. A drive cylinder 7d is interposed between the tip of the other arm 7c and the pedestal 2a.

The support device 4 includes a base 8, an upper support 9, an intermediate support 10, and a lower support 11. The base 8 is a rectangular box frame fixed to the pedestal 2a, and a ball screw 8b driven by a brake-equipped motor 8a is rotatably supported at the center of the inside in a direction perpendicular to the traveling direction of the workpiece W. At the same time, two transverse rails 8c are laid along the ball screw 8b on both sides above and below it. The upper support stand 9 is
It is a frame with an L-shaped cross section, and on the back side of the vertical plate 9a (right side in FIG. 2), there are two ball nuts 9b that are screwed into the ball screw 8b and two that are slidably engaged with the transverse rail 8c. A guide block 9c is fixedly installed and supported so as to be movable laterally with respect to the base 8. The intermediate support stand 10 is a flat plate with two
A book traveling rail 10a is laid along the traveling direction of the workpiece W, is suspended from the lower surface of the horizontal plate 9d of the upper support stand 9 so as to be able to rise and fall via a drive cylinder 10b, and is suspended between the upper support stand 9 and the lower surface of the horizontal plate 9d. It is guided by a plurality of guide cylinders 10c interposed therein. The guide cylinder 10c is an intermediate support base 10
It has a compression spring 10d that urges upward. In the lower support stand 11, a rectangular cylindrical cutting machine support 11b is fixed to the lower surface of a flat plate 11a at an angle of a chamfer angle A, which will be described later, and the upper surface thereof is slidably engaged with the running rail 10a. Four guide blocks 11c are fixedly installed, and the flat plate 11
A lower support stand 11 is located between a and the intermediate support stand 10.
A drive cylinder 11d for moving the workpiece W in the running direction is interposed, and is supported movably along the running direction of the workpiece W with respect to the lower surface of the intermediate support base 10.

The cutting device 5 includes a cutting machine 12 and a side edge sensor 13. The cutting machine 12 has a casing 12a
A cutting cutter 14 driven by a motor is installed inside the
The casing 12a has a guide member 15 outside the casing 12a, and the cutting machine support 1
It is installed inside 1b and is provided so that the angle can be adjusted. The side end sensor 13 is a sensor using a proximity switch or the like similar to the tip sensor 7, and is provided on the side surface of the cutting machine support 11b so as to be movable up and down via a drive cylinder 13a.
In order to chamfer the leading edge of the workpiece W over the entire width thereof, the side surface of the workpiece W is detected and a stop signal is output to the motor 8a with a brake, which is a lateral movement drive means for the upper support table 9.

The cutting cutter 14 is, for example, a cutter having a plurality of carbide blades planted on the outer periphery of a disk, and
It is fixed to the shaft end of the workpiece W, and chamfers the leading edge of the workpiece W. Note that the cutting machine support 11
b is inclined by the chamfer angle A, so when the casing 12a is installed, the cut center line X-X
is automatically inclined by a chamfering angle A with respect to the traveling direction of the workpiece W, and the chamfering angle A is adjustable, and approximately 15 degrees is appropriate.

The guide member 15 is a rod-shaped member having an inverted L-shape in cross section, and is composed of a horizontal leg portion 15a and a vertical leg portion 15b, and has a cutout hole 15c formed at a central corner, and is cut into a lower corner of the casing 12a. It is fixedly installed along the lateral movement direction of the machine 12, and both legs 1
The inner surfaces of 5a and 15b guide the lateral movement of the cutting machine 12 along the upper surface and the tip surface of the workpiece tip. As shown in FIG. 3, a portion of the outer periphery of the cutter 14 projects inside the guide member 15 from the cutout hole 15c. Reference numeral 16 denotes a guide roller, which is comprised of a plurality of rollers 16b rotatably supported by a casing 16a, and is provided so as to be movable up and down via a drive cylinder 16d on a bracket 16c fixed to the center of the vertical leg 15b. Along with the roller 16b
is located inside the vertical leg portion 15b (on the right side in FIG. 2), and is interposed between the bracket 16c and the vertical leg portion 15b.
It is guided by two guide cylinders 16e.

Next, the operation of the above embodiment will be explained.

Usually, the work W is handled in a range of 0.5 to 3.2 mm in thickness and 600 to 1600 mm in width.

First, the tip of the workpiece W, which has been partially unwound from the steel plate coil, is
When it passes through the opposing space c and reaches the workpiece exit side,
The tip sensor 7 detects the tip surface of the workpiece W, stops the travel of the workpiece W, and rotates upward when the tip surface of the workpiece W is positioned.
Evacuate from the lateral movement position of 2. Next, the clamp member 6 is lowered by the drive cylinder 6b to press and fix the tip of the workpiece W. And motor 8
a causes the ball screw 8b to rotate, and the upper support base 9
move laterally. Along with this, the cutting device 5 moves laterally, and when the side edge sensor 13 is lowered by the drive cylinder 13a and detects one side edge surface of the tip of the workpiece W, a timer (not shown) causes the upper part to move after a certain period of time. The support stand 9 stops, and along with this,
The cutting device 5 stops at a position suitable for the next operation (see FIG. 1).

First, as the intermediate support base 10 is lowered by the drive cylinder 10b, the guide member 15 of the cutting machine 12 is lowered, and the lower surface of the horizontal leg portion 15a pushes down the upper surface of the tip of the workpiece W. At the same time, the lower support base 11 is moved toward the workpiece W by the drive cylinder 11d, and in conjunction with this, the guide member 15 is moved to the same side, and the inner surface of the vertical leg portion 15b presses the front end surface of the workpiece W. Subsequently, the guide roller 16 is raised by the drive cylinder 16d, and clamps the leading edge of the workpiece W between it and the outer periphery of the cutter 14. next,
The ball screw 8b is rotated by the motor 8a, and the upper support base 9 is laterally driven. Along with this, the cutting device 5 moves laterally, and the cutter 14 is rotated by the motor 14a. The cutting machine 12 chamfers the leading edge of the workpiece W at a chamfering angle A while moving laterally along the leading edge of the workpiece W (the upper surface and the leading surface of the leading edge) by the guide member 15, and chamfers the leading edge of the workpiece W at a chamfering angle A. When approaching the side edge of , the side edge sensor 13 detects the side edge surface, and the timer causes the upper support base 9 to stop after a certain period of time has elapsed. Thereby, the cutting machine 12 can completely chamfer the entire width of the tip edge of the workpiece W, and then the cutter 14 stops. Subsequently, the guide roller 16, lower support stand 11, and intermediate support stand 10 return to their original positions, and the cutter 14 and guide member 15
is removed from the leading edge of the workpiece W, and the side edge sensor 13 is further lowered to maintain the original detection distance. Next, the upper support base 9 moves laterally in the opposite direction to the above, and when the side edge sensor 13 detects one side edge surface of the tip of the workpiece W, the timer stops after a certain period of time has elapsed, and the side edge sensor 13 rises to its original position. Along with this, the cutting device 5 returns to its original state. Finally, the clamp member 6 rises to release the tip of the workpiece W. In this way, the workpiece W having the chamfered tip edge is fed out to a desired length and recoiled, and then cut by the shearing blades 2b and 2c.

(Effects of the Invention) As described above, the present invention supports the workpiece clamping device and the supporting device of the cutting device on the mount of the shearing machine, so the existing shearing machine can be used without providing a dedicated mount. It is possible to construct a steel plate tip cutting device, which is advantageous in terms of saving installation space, and has mutually orthogonal legs that can come into contact with the upper surface and tip surface of the tip of the workpiece, and a corner corner in the center. A guide member having a cutout hole for protruding a part of the outer periphery of the cutting cutter is provided in the section, and the guide member guides the lateral movement of the cutting machine along the upper surface and the tip surface of the tip of the workpiece. Since the winding tip edge of the workpiece can be automatically chamfered, the finishing accuracy and workability of chamfering are improved regardless of the deviation of the stop position of the workpiece or the thickness of the workpiece. Since there is no need to manufacture a new recoil mandrel each time the recoil mandrel differs, there are advantages such as a significant cost reduction and a marked improvement in yield.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the apparatus of the present invention, in which Fig. 1 is a front view of the steel plate tip cutting apparatus, Fig. 2 is a cross-sectional view of a part of the right side view of Fig. 1, and Fig. 4 is a cross-sectional view showing the recoil state of a conventional steel plate, FIG. 5 is a cross-sectional view showing an example of a conventional chamfering method, and FIG. 6 is a cross-sectional view showing an example of a conventional recoil mandrel. It is a diagram. 1... Steel plate tip cutting device, 2... Shearing machine, 2
a... Frame, 3... Clamp device, 4... Support device, 5... Cutting device, 6... Clamp member, 7...
... Tip sensor, 8 ... Base, 9 ... Upper support stand,
10...Middle support stand, 11...Lower support stand, 12
... Cutting machine, 12a ... Casing, 13 ... Side end sensor, 14 ... Cutting cutter, 14a ... Motor, 15 ... Guide member, 15c ... Notch hole,
16... Guide roller, A... Chamfering angle, W...
...Work, X-X...Cut center line.

Claims (1)

[Scope of Claims] 1. A clamping device for fixing the tip of the workpiece to the workpiece outlet side of a mount of a shearing machine that cuts a steel plate workpiece fed from a steel plate coil, a cutting device for chamfering the edge of the tip of the workpiece, and and a support device for supporting the cutting device, and the clamp device is provided on the pedestal of the shearing machine so as to be rotatable in the vertical direction, and has a tip end that detects the front end surface of the workpiece in order to stop feeding the workpiece. The support device includes a sensor and a clamp member that is movably installed on the shearing machine mount and that presses and fixes the leading end of the workpiece whose feeding is stopped from above. An upper support stand provided on a fixed base so as to be movable laterally in a direction perpendicular to the traveling direction of the workpiece; an intermediate support stand provided on the lower surface of the upper support stand so as to be movable up and down; and a lower surface of the intermediate support stand. and a lower support stand movable in parallel to the traveling direction of the workpiece, the cutting device having a cutting cutter driven by a motor for chamfering the leading edge of the workpiece, and a cutter mounted on the lower surface of the lower support stand. A cutting machine whose center line is inclined by the chamfering angle with respect to the workpiece traveling direction;
The cutting machine is provided oppositely to the lower part of the cutter, and has an inverted L-shaped cross-sectional shape having mutually orthogonal legs that can come into contact with the top surface and the tip surface of the tip of the workpiece, and has a central corner with an outer periphery of the cutter. a guide member having a cutout hole formed therein for protruding a part thereof and guiding lateral movement of the cutting machine along the upper surface and the tip surface of the workpiece tip by the inner surfaces of the two legs; a guide roller that clamps the leading edge of the workpiece between the cutter protrusion protruding from the cutout hole; and a guide roller that is movable up and down on the lower surface of the lower support base and that stops the lateral movement of the upper support base. A steel plate tip cutting device comprising a side edge sensor that detects a side edge surface.