JPS63237858A - Steel board tip grinding machine - Google Patents

Abstract

PURPOSE:To bevel the winding edge of a steel board automatically by constructing a grinding machine such that a cutter bevels the edge of a work while the inner faces at the opposite foot sections of a guide member guiding lateral motion of the grinding machine respectively along the upper face at the tip of the work and the tip end face. CONSTITUTION:The tip portion of a work W is fed out from a steel board coil to the outlet side of work and stopped thereat. Then an intermediate supporting table 10 is lowered to lower a guide member 15 for a grinding machine 12 so as to push down the upper face at the tip of the work W by means of the under face of one foot section 15a of the guide member 15. At the same time, a lower supporting table 11 moves to the work W side so as to push the inner face of the other foot section 15b of the guide member 15 against the tip end face of the work W. Thereafter, a guide roller 16 lifts to hold the edge at the tip of the work between the outer circumference of a cutter 14. Then a grinding machine 5 is moved laterally and the cutter 14 is driven. The grinding machine 12 is moved laterally along the edge of the work by means of the guide member 15 and bevels the edge with predetermined angle.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a method for rewinding a steel plate into a coil shape (hereinafter referred to as recoil) after unwinding it from a steel plate coil and cutting off the tip scrap with a shearing machine. The present invention relates to a steel plate tip grinding device that chamfers the winding tip edge.

(Prior art) When supplying steel plates to customers, the steel plate is fed out from a steel plate coil, the scrap at the tip is cut, and then the steel plate is recoiled and supplied. There are many known methods for winding the steel plate. However, as shown in Fig. 4, when recoiling the steel plate on the mandrel a, a permanent deformation part d is generated in the steel plate due to the step of the winding tip surface C, and in particular,
In areas where the winding diameter is small, the permanently deformed portions d are intermittent 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 reach up to 60 m, and its weight varies depending on the sheet thickness, but it can reach up to 2000 kg per coil at most, which significantly reduces the yield of steel sheets. Therefore, as a countermeasure, as shown in Fig. 5, the winding tip edge e is chamfered with a grinder f to reduce the level difference, or as shown in Fig. 6, a steel plate is placed on the core metal a in advance. Conventionally, a method has been adopted in which a step g corresponding to the thickness is formed.

(Problems to be Solved by the Invention) However, according to the method shown in FIG. 5 above, there are problems in that the finish accuracy of chamfering is poor and workability is poor, and the method shown in FIG. However, since it is necessary to manufacture a separate core metal a for each steel plate having a different thickness, there is a problem in that the cost increases.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above conventional problems and provide a grinding device that can be easily attached to an existing shearing machine and can automatically chamfer the winding tip edge of a steel plate.

(Means for solving problems) Means for solving the above problems of the present invention are as follows.

A shearing machine that cuts a steel plate fed from a steel plate coil is equipped with a clamping device for fixing the tip of the workpiece on the workpiece exit side of the mount and a grinding device for chamfering the edge of the tip of the workpiece via a support device. In the above-mentioned clamp device, a clamp member that presses and fixes the tip of the workpiece from above is provided on the shearing machine frame so as to be movable up and down, and a tip sensor that detects the tip surface of the workpiece is provided so as to be rotatable in the vertical direction. In the above-mentioned support device, an upper support stand is installed on a base fixed to the shearing machine frame so that it can move laterally in a direction perpendicular to the workpiece travel direction, and an intermediate support stand can be moved up and down on the lower surface of the upper support stand. A lower support base is provided on the lower surface of the intermediate support base so as to be movable in the workpiece traveling direction, and the above-mentioned grinding device has a grinding cutter driven by a motor inside the casing and a grinding cutter driven by a motor on the lower surface of the lower support base, and a grinding cutter driven by a motor on the outside of the lower support base. A grinding machine is provided with guide members each having an inverted cross-sectional shape, the cutter center line being inclined by the chamfering angle with respect to the workpiece traveling direction, and a side edge sensor for detecting the side end face of the workpiece. The cutter is arranged to be movable up and down, and a part of the outer periphery of the cutter projects inside the guide member through a notch hole formed in a central corner of the guide member, and the leading edge of the workpiece is held between this cutter protrusion and the cutter protrusion. A guide roller is provided inside the guide member so as to be movable up and down, and the inner surface of the rain leg of the guide member guides the lateral movement of the grinder along the upper surface and the tip surface of the tip of the workpiece, while the cutter chamfers the edge of the tip of the workpiece. It is characterized by the following.

(Operation) The operation of the above means is as follows: First, the tip of the steel plate (workpiece), which is partially unwound from the steel plate coil, passes through the space opposite the shearing force object 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 grinding machine, which will be described later. The clamp member descends to press and fix the tip of the workpiece. Next, the upper support table moves laterally to move the grinding device laterally, and when the side edge sensor descends and detects one side edge surface of the tip, a timer causes the upper support table to stop after a certain period of time has elapsed. , the grinding device is stopped at an appropriate position for the next operation. First, the guide member of the grinding machine is lowered by lowering the intermediate support base, and the lower surface of one leg of the guide member is pushed down onto 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. Next, the guide roller rises,
1. Holding the tip edge of the workpiece between the outer circumference of the cutter of the grinding machine
Next, the upper support table moves laterally to move the grinding device laterally, and the cutter is driven. The grinding machine chamfers the leading edge of the workpiece at a predetermined chamfer angle while moving laterally along the leading edge of the workpiece using a guide member, and when the grinding machine approaches the other side edge of the leading edge of the workpiece, the side edge sensor detects the side edge. is detected, and the upper support base temporarily stops after a certain period of time has elapsed using a timer. As a result, the grinding machine completely chamfers the entire width of the leading edge of the workpiece, and then stops the cutter. Subsequently, the guide roller, lower support stand, and intermediate support stand return to their original positions, and the cutter and guide member are separated from the leading edge of the workpiece.

The side edge sensor is further lowered to maintain the original sensing 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 grinding 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 force tool.

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

1 and 2 show a steel plate tip grinding device 1 according to the present embodiment, which is installed on the workpiece outlet side of a pedestal 2a of a shearing machine 2, and is connected to a clamp device 3 and a support device 4 to grind the tip of the workpiece. It includes a grinding device 5 for chamfering the edges.

The shearing machine 2 is a device that cuts a steel plate (hereinafter referred to as a work) W fed from a steel plate coil (not shown) using a pair of upper and lower shearing force members 2b and 2C.

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 traveling direction (arrow direction in FIG. 2) and guided by a plurality of guide cylinders 6C interposed between the clamp frame 6a and the clamp frame 6a. The tip sensor 7 is a sensor using a so-called proximity switch or the like, 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. 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, and an intermediate support 10.
and a lower support stand 11. The base 8 is the mount 2a
A rectangular box frame fixed to the

A ball screw 8b driven by a brake-equipped motor 8a is rotatably supported in the inner central part in a direction perpendicular to the traveling direction of the workpiece W, and two transverse rails 8c are provided along the ball screw 8b on both sides above and below it. has been installed.

The upper support stand 9 is a frame with an L-shaped cross section, and is slidably engaged with a ball nut 9b screwed into a ball screw 8b on the back side of the vertical plate 9a (right side in FIG. 2) and a transverse rail 8c. Two guide blocks 9c are fixedly attached to the base 8.
It is supported so that it can move laterally. Intermediate support stand 10
is a flat plate with two running rails 10a on the bottom surface of the workpiece W.
horizontal plate 9 of the upper support base 9.
It is suspended from the lower surface of d so that it can rise and fall via a drive cylinder 10b, and is guided by a plurality of guide cylinders 10c interposed between it and the upper support base 9. The guide cylinder 10c has a compression spring 10d that urges the intermediate support base 10 upward. The lower support stand 11 is a flat plate 1
A square cylindrical grinding machine support 11b is fixed to the lower surface of 1a at an angle of a chamfer angle A, which will be described later, and four guide blocks llc are attached to the upper surface of the grinder 1a to slidably engage with the running rail 10a. A drive cylinder lid is interposed between the flat plate 11a and the intermediate support 10 to move the lower support 11 in the traveling direction of the workpiece W. It is supported movably along the running direction of the workpiece W on the lower surface of the workpiece W. The grinding device 5 includes a grinder 12 and a side edge sensor 13. The grinding machine 12 includes a grinding cutter 14 driven by a motor inside a casing 12a, and a guide member 1 outside.
5, and the casing 12a is mounted inside the grinding machine support 11b 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 grinding machine support 11b so as to be movable up and down via a drive cylinder 13a. The cutter 14 is, for example, a cutter having a plurality of carbide blades implanted on the outer periphery of a disk, and is fixed to the shaft end of the motor 14a. Note that since the grinding machine support 11b is inclined by the chamfer angle A, when the casing 12a is attached, the cutter center line XX is automatically inclined by the chamfer angle A with respect to the traveling direction of the workpiece W. In addition, the chamfer angle A is adjustable, and approximately 15 degrees is appropriate.

The guide member 15 is a rod-shaped member with an inverted cross-sectional shape, 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 ground at a lower corner of the casing 12a. It is fixedly installed along the lateral movement direction of the machine 12. 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 mounted on a bracket 16c fixed to the center of the vertical leg portion 15b so as to be movable up and down via a drive cylinder 16d. At the same time,
Place the roller 16b inside the vertical leg 15b (on the right side in Figure 2).
2 located between the bracket 16c and the bracket 16c.
It is guided by two guide cylinders 16e.

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

Usually, the workpiece W is handled as having a thickness of 0.5 to 3.2 mm and a width of 600 to 1600 nn.

First, when the tip of the workpiece W partially unwound from the steel plate coil passes through the opposing spaces of both shearing blades 2b and 2C of the shearing machine 2 and reaches the workpiece outlet side, the tip sensor 7 detects the workpiece W.
The work W stops traveling by detecting the tip surface of the grinder W, and when the tip surface of the work W is positioned, it rotates upward and retreats from the lateral movement position of the grinding machine 12, which will be described later.Next, the clamp member 6 is lowered by the drive cylinder 6b to press and fix the tip of the workpiece W. Then, the ball screw 8b is rotated by the motor 8a, and the upper support base 9 is moved laterally.

Along with this, the grinding device 5 moves laterally, and the side edge sensor 13
is lowered by the drive cylinder 13a and detects one side end face of the tip of the workpiece W, a timer (not shown) causes the upper support stand 9 to stop after a certain period of time has elapsed, and accordingly, the grinding device 5 , and stop at an appropriate position (see Figure 1) for the next operation.

First, as the intermediate support base 10 is lowered by the drive cylinder 10b, the guide member 15 of the grinding 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 connected to the drive cylinder lid.
As a result, the guide member 15 moves toward the workpiece W side.
moves to the same side, and the inner surface of the vertical leg portion 15b presses against 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 moved laterally. Along with this, the grinding device 5 moves laterally, and the cutter 14 is rotated by the motor 14a. The grinding 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 by the guide member 15, and when it approaches the other side edge of the leading end of the workpiece W, The side edge sensor 13 detects the side edge surface, and the timer causes the upper support base 9 to temporarily stop after a certain period of time has elapsed. As a result, the grinder 12 completely chamfers the entire width of the tip edge of the workpiece W, and then stops the cutter 14. Subsequently, the guide roller 16, lower support stand 11, and intermediate support stand 10 return to their original positions to remove the cutter 14 and guide member 15 from the leading edge of the workpiece W, and the side edge sensor 13 further descends. 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 grinding 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 leading edge is fed out to a desired length and recoiled, and then cut by the shearing force members 2b and 2c.

(Effects of the Invention) As described above, the present invention can be easily attached to an existing shearing machine, and has a structure that can automatically chamfer the winding tip edge of a workpiece, thereby improving the finishing accuracy and workability of chamfering. In addition to this, there is no need to manufacture a new recoil mandrel every time the thickness of the steel plate differs, so the cost can be significantly reduced and the yield can be significantly improved.

[Brief explanation of drawings]

The drawings illustrate embodiments of the apparatus of the present invention, in which Fig. 1 is a front view of the steel plate tip grinding apparatus, Fig. 2 is a cross-sectional view of a part of the right side view of Fig. 1, and Fig. Figure 4 is a cross-sectional view showing a conventional steel plate glue coil state, Figure 5 is a cross-sectional view showing an example of a conventional chamfering method, and Figure 6 is an example of a conventional glue coil core. FIG. 1... Steel plate tip grinding device, 2... Shearing machine, 2a... Frame, 3... Clamp device, 4... Support device , 5...Grinding device, 6...Clamp member, 7...Tip sensor, 8...Base, 9...Upper support Table, 10... Intermediate support stand, 11... Lower support stand, 12... Grinding machine, 12a...
・Casing, 13・Old...Side end sensor, 14...
...Grinding cutter, 14a...Motor, 15.
...Guide member, 15c...Notch hole, 1
6... Guide roller, A... Chamfering angle, W... Work, X-X... Cutter center IIA.

Claims (1)

[Claims] (1) The shearing machine that cuts the steel plate fed from the steel plate coil is equipped with a clamping device that fixes the tip of the workpiece on the workpiece exit side of the mount and a grinding device that chamfers the edge of the tip of the workpiece via a support device. Therefore, the above clamping device is
A clamp member that presses and fixes the tip of the workpiece from above is provided on the shearing machine frame so as to be movable up and down, and a tip sensor that detects the tip surface of the workpiece is provided so as to be rotatable in the vertical direction. The device is equipped with an upper support stand that is movable laterally in a direction perpendicular to the workpiece traveling direction on a base fixed to the shearing machine frame, and an intermediate support stand that is movable up and down on the lower surface of the upper support stand. A lower support table is provided on the lower surface of the table so as to be movable in the workpiece travel direction, and the above-mentioned grinding device has a grinding cutter driven by a motor inside the casing and an inverted L-shaped cross section on the outside of the lower support table. A grinding machine is provided with a cutter center line inclined at a chamfering angle with respect to a workpiece traveling direction, and a side edge sensor for detecting a workpiece side end face is provided so as to be movable up and down. A part of the outer periphery of the cutter protrudes inside the guide member from a notch hole formed at the central corner of the guide member, and a guide roller that holds the leading edge of the workpiece between this cutter protrusion and the cutter protrusion extends inside the guide member. The cutter chamfers the edge of the tip of the work while the inner surfaces of both legs of the guide member guide the lateral movement of the grinding machine along the upper surface and the tip surface of the tip of the work. Steel plate tip grinding device.