JPH0440121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for cutting the end face of a workpiece using a milling cutter, and is particularly suitable for cutting the end of a strip.

In strip processing equipment such as steel plate rolling lines,
In order to make the width of the strip plate constant, a trimming process is provided in which both ends of the strip plate are cut or cut. Conventionally, the cutting of the side edge of the strip is carried out by driving and rotating a pair of milling cutters 1, each of which has a large number of chips 1b on the circumferential surface of a cutter body 1a, as shown in FIGS. 1 and 2. This is done by guiding a strip 2 between two milling cutters 1. In the figure, 3 is a base, 4 is a cutter head that supports the milling cutter 1 and has a built-in speed reducer, etc., 5 is a motor for driving the cutter, 6 is a lower support roller that supports the band plate 2 from below, and 7 is a band plate. This is an upper support roller that presses the upper surface of the plate 2.

In the above cutting method, since the relative position between the strip plate 2 and the milling cutter 1 is always constant, the tip 1
The same portion of tip 1b contributes to cutting, and the tip 1b is locally worn. Moreover, as shown in FIG. 3, this local wear causes boundary wear 8 in which the portion of the strip plate 2 that contacts the edge is deeply worn, significantly shortening the life of the chip 1b. Such a problem similarly occurs even if a milling cutter without a grafted blade is used.

The present invention has been made in view of the above-mentioned circumstances, and is designed to make the wear of the cutting edge of a milling cutter substantially uniform over the effective cutting edge length, regardless of the thickness of the workpiece material, thereby extending the life of the milling cutter. The purpose is to extend the period.

The structure of the present invention that achieves the above object is a device for cutting the end face of a workpiece, in which the workpiece is supported from below by a lower support roller fixed to a support frame, and the end face of the workpiece is cut. A swinging frame supporting a milling cutter is swingably supported, an upper support roller that comes into contact with the upper surface of the workpiece is supported by the swinging frame, and the upper support roller is moved relative to the swinging frame. An end face cutting device characterized by being capable of vertical movement.

Hereinafter, one embodiment of the device according to the present invention will be described based on the drawings.

FIG. 4 shows a schematic front view of one embodiment of the cutting device. Although this cutting device is provided on both sides of the strip movement line, only one side is shown in FIG.

A support frame 12 is provided on the base 11, and a swing frame 13 is swingably supported on the support frame 12 by a pivot shaft 14. A milling cutter 1 is installed on the inside of the swing frame 13.
is supported. Here, as the milling cutter 1, one in which a large number of chips 1b are provided on the circumferential surface of a cutter body 1a is employed. A cutter drive motor 15 is mounted on the swing frame 13, and the operation of the cutter drive motor 15 causes
Power transmission mechanism (reducer, etc.) in the swing frame 13
The milling cutter 1 is driven and rotated via.
A lower support roller 16 is provided on the inner side of the support frame 12 to support the strip plate 2, which is a workpiece, from below. On the other hand, the upper part of the swinging frame 12 extends above the side of the strip plate 2, and there is an upper support roller 17 that presses the upper surface of the strip plate 2 and can be moved up and down with respect to the swinging frame 12 by a rolling device 18. is supported by The rolling device 18 includes a rolling screw 19 having an upper support roller 17 at its lower part.
and is rotatably supported on the swing frame 12 side,
A worm wheel 20 that is screwed onto the threaded portion 19a at the top of the reduction screw 19, a worm 21 that engages with the worm wheel 20, and a worm 21 that is engaged with the worm wheel 20.
The upper support roller 17 is moved up and down together with the reduction screw 19 by driving the motor 22 in the forward or reverse direction. A swing cylinder 23 is installed on the base 11 and connected to the outer side of the swing frame 12, and serves to pull the entire swing frame 12 toward the lower support roller 16.

A strip 2 is supplied between milling cutters 1 of a cutting device installed on both sides of the strip moving line.
is supported from below by a lower support roller 16 and pressed from above by an upper support roller 17, and in this state, the side edge of the strip plate 2 is cut by the milling cutter 1. The strip plate 2 may have undulations or other irregularities, but since the upper support roller 17 follows the upper surface of the strip plate 2 and is attached to the swing frame 12,
As the upper support roller 17 moves up and down, the swing frame 12 swings together, and the milling cutter 1 supported by the swing frame 12 follows the ups and downs of the band plate 2. On the other hand, by the operation of the rolling device motor 22 of the rolling device 18, the rolling screw 19 and the support roller 17 are moved up and down at a very slow speed. Since the upper support roller 17 is pressed onto the band plate 2, the swing frame 12 actually moves up and down, changing the relative position between the upper support roller 17 and the swing frame 12 (as shown in FIG. 4). As L changes), the cutting contact surface of the tip 1b of the milling cutter 1 with the side edge of the strip plate 2 gradually moves downward or upward, as shown in FIG. For example, limit switches are provided between the screw down screw 19 and the swing frame 12 at upper and lower limit positions corresponding to the effective cutting edge length of the chip 1b, and the rotation of the motor 22 for the screw down device is switched between normal and reverse rotation.
This is done by receiving ON and OFF signals. As described above, in addition to the milling cutter 1 following the ups and downs of the strip plate 2, the milling cutter 1 is moved up and down with respect to the strip plate 2 so that the cutting contact surface of the chip 1b changes momentarily within the effective cutting edge. Therefore, the total length of the effective cutting edge contributes to cutting.

Note that the same effect can be achieved even if a milling cutter of an integrally molded type that is not a blade-planted type is used.

As described above with reference to one embodiment, according to the end face cutting device using a milling cutter according to the present invention, the cutting contact surface of the cutting edge portion of the milling cutter with the work material changes within the effective cutting edge portion. As a result, local wear (including boundary wear) of the cutting edge does not occur, and wear is approximately uniform over the entire length of the effective cutting edge.
The life of the milling cutter is greatly improved.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the cutting state of the conventional strip side end, Fig. 2 is a front view thereof, Fig. 3 is a cross-sectional view showing the state of wear of the tip, and Fig. 4 is an embodiment of the present invention. FIG. 5, which is a front view of such a cutting device, is an explanatory view showing a cutting method using the device according to an embodiment of the present invention. In the drawing, 1 is a milling cutter, 1b is a chip, 2 is a band plate, 12 is a support frame, 13 is a swinging frame, 17 is an upper support roller, 18 is a rolling device, 19 is a rolling screw, and 22 is a motor for the rolling device. , 23 are swing cylinders.

Claims (1)

[Claims] 1 In a device for cutting the end face of a workpiece, the workpiece is supported from below by a lower support roller fixed to a support frame, and a swinging frame supporting a milling cutter that cuts the end face of the workpiece is oscillated. An upper support roller that is movably supported and comes into contact with the upper surface of the workpiece is supported by the swing frame, and the upper support roller is movable up and down with respect to the swing frame. End face cutting device.