JPS637452Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for cutting a side end in the longitudinal direction of a cross section of a horizontally transported steel plate (steel strips and thick plates are collectively referred to as steel plates).

For example, it is necessary to cut both ends of a hot-rolled steel plate used for manufacturing electric resistance welded steel pipes, spiral steel pipes, etc. to a predetermined width.

For this purpose, various measures have been taken in the past. For example, as shown in FIG. 1, two rotary blades C1 and C2 supported on parallel shafts are installed back-to-back above and below a steel plate S, and the side surface of the steel plate S is attached to the two rotary blades C1 and C2. As shown in Fig. 2, a side trimmer designed to cut the steel plate S
A milling cutter with a blade perpendicular to the surface of the
Devices that mill the side surface of a steel plate are known, but the former poses no problem if the side surface of the steel plate has a sufficient cutting allowance, but those without a sufficient cutting allowance (such as those that do not have a sufficient cutting allowance) If the steel sheet is allowed to have a certain amount of thickness, the yield rate of the steel plate will be impaired), causing problems such as the inability to cut the steel plate. In addition, when the latter is installed as the inlet equipment of the pipe production line,
In order to enable steel plate edge milling at the same speed as pipe making, it is necessary to improve the cutting ability by using a milling cutter with a very large radius of curvature. Therefore, although it is not impossible to increase the cutting capacity of this device, it is necessary to equip it with a milling cutter of a very large diameter, which increases the size of the device and avoids the economic disadvantage associated with this. I can't escape.

Therefore, in order to solve these problems, when the cutter axis is tilted to the steel plate processing surface so that the blade of the bevel gear-shaped milling cutter is positioned parallel to the steel plate processing surface that is transferred horizontally, the blade edge The trajectory drawn is an ellipse in plan view, and the cutting curvature is increased without increasing the diameter of the cutter. In other words, bevel gear-shaped milling cutters are arranged at an angle on both sides of the steel plate to form an edge ring. However, this device has the excellent feature of suppressing the increase in equipment size and being able to cut the side edges of steel plates at high speed, but on the other hand, Because the cutter axis is inclined, replacing the milling cutter, which is a consumable part, is difficult and dangerous work. This is because, when the pipe manufacturing speed, that is, the steel plate feeding speed, is approximately 46 m/min, the diameter of the milling cutter is normally 1200 mm, and the weight is approximately 800 m/min.
Kg/piece, and experimental results have confirmed that the cutter replacement frequency due to wear or breakage of the carbide cutting edge is approximately once every 8 hours during continuous operation. It is extremely difficult to replace a milling cutter by hand alone, and normally a hoist or other cargo handling machine is used to remove and replace the installation. The work is extremely difficult and dangerous.

In view of the above, this invention has been developed in a device for edge milling in which bevel gear-shaped milling cutters are arranged obliquely on both sides of a horizontally transferred steel plate, and a part of the device is improved to allow replacement of the milling cutters. The purpose is to make the work easier and safer.

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

In Figs. 4 to 6, 1 is a bevel gear-shaped milling cutter having a carbide cutting blade with a blade length greater than the thickness of the steel plate S, and is attached to and detached from the output rotation shaft of a cutter head 5 supported in a freely tiltable manner. The milling cutter 1' is freely attached and is arranged in an inverted V-shape in combination with another milling cutter 1' which is arranged oppositely at a predetermined distance. One end of both cutter heads 5 is rotatably supported via a pin 4 on a bracket 3 fixedly installed on the side of the steel plates separated from each other on the sliding tables 2 and 2', which move in different directions, and the other end is slidably supported. Moving platform 2,
It is connected to a piston rod of a hydraulic cylinder 9 which is tiltably supported by 2', and is placed and fixed on the slide tables 2 and 2' during cutting operations. The tilting fulcrum (pin 4) is configured to be located slightly below the blade surface of the milling cutter that contacts the steel plate cutting point. A milling cutter driving motor 6 is attached to the cutter head 5, and the rotational force of the motor 6 is transmitted from a transmission mechanism in the cutter head 5 to the milling cutters 1, 1' via a reduction gear 7. .
8 is a sliding table 2 on both sides of the cutter head 5;
The hydraulic cylinder 9 is swingably supported at the upper end of the bracket 8 by a bracket protruding from the bracket 2'.

The sliding tables 2 and 2' are slidably supported on a common table 10, and a motor 11 installed on the common table 10 is operatively connected to two systems of threaded rods 13 via a speed reducer 12. There is. The screw rod 13 is the sliding base 2,
It is screwed into internal screws 14, 14' attached to the lower surface of the screw rod 2', and each of the two threaded rods 13 has two screws with different thread directions. By driving the motor 11 in forward and reverse rotation, the respective milling cutters 1 and 1' are brought closer to each other or separated from each other via slide tables 2 and 2' that are interlocked with the motor 11.

The common base 10 is slidably supported on the bed 15, and a female thread 19 is attached to the lower surface of the common base 10.

The bed 15 has a motor 1 installed at one end thereof.
6, and a screw shaft 18 interlocked with this via a speed reducer 17, and the screw shaft 18 is screwed into the female thread 19. The motor 16 is automatically driven by a signal from a separately provided detector 22 to move the common stand 10, that is, the cutter body, following the camber (longitudinal curvature) of the steel plate S.

Further, on the inner end side of each of the sliding tables 2, 2', there is a roller 2 rotatably supported on the sliding tables 2, 2'.
1a and supported by the rod tip of the cylinder 20,
A clamp roller 21 is provided, which is a combination of a roller 21b and a roller 21b arranged opposite to the roller 21a. This clamp roller 21 is a steel plate S
The milling cutter is located offset toward the steel plate entry side from the end point of its action. 23 is installed on the entrance and exit sides of the cutter body with pinch rolls,
The conveyance of the steel plate S to be cut is controlled.

Since the present invention has the above-mentioned configuration, the steel plate S to be transferred horizontally is moved by the bevel gear-shaped milling cutters 1 and 1', which are arranged at both ends in an inverted V-shape with respect to the steel plate surface. Cut at high speed.
In addition, if there is longitudinal warpage in the steel plate S during operation, a detector 22 installed on the entry side of the cutter body
is activated, and the motor 16 is driven based on the signal, and the cutter body is moved to follow the warp in the longitudinal direction of the steel plate S by the screw shaft 18 that rotates in conjunction with the motor 16.

Along with the operation, milling cutter 1,
If the cutter head 1' needs to be replaced due to wear or breakage, first stop the operation and then move the cutter head 5 connected to it by pushing out the cutter head tilting device, for example, the cylinder 9 supported on the support bracket 8. The milling cutter 1 is swung upwards as shown in the imaginary line using the pin 4 as a fulcrum, and is pivotally supported by the cutter head 5.
Turn 1' upward. In this state, after removing the mounting bolts (not shown) of the milling cutters 1, 1', they can be easily replaced using a suitable material handling machine such as a hoist.

In the above explanation, the two milling cutters that are combined with each other are arranged in an inverted V-shape at an angle with respect to the steel plate S. It is. Further, in the above explanation, an embodiment of the cutting device that simultaneously cuts the longitudinal side ends of the cross section of the steel plate S has been described, but the present invention is not limited to this, and cuts only one side end of the cross section of the steel plate in the longitudinal direction. Needless to say, it can also be applied to cutting equipment.

As described in detail above, the present invention provides a cutter head swing mechanism on a movable sliding table, and the swing mechanism causes the milling cutter, which is pivotally supported at an angle to the cutter head, to swing upward. As a result, the milling cutter, which is a heavy object, can be easily replaced using a cargo handling machine while suspended horizontally, and the original purpose of the invention can be reliably achieved.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are conceptual diagrams of conventional equipment;
FIG. 4 is a side view showing an embodiment of the present invention, FIG. 5 is a plan view, and FIG. 6 is a front view taken along the line from FIG. 4. 1, 1'...milling cutter, 2, 2'...
Sliding base, 3...Bracket, 4...Pin, 5...
Cutter head, 6, 11, 16...Motor, 7
...Deceleration mechanism, 8...Support bracket, 9,20
...Cylinder, 9'...Piston rod, 10...
...Common base, 12, 17...Reducer, 13...Threaded rod, 14, 14', 19...Female thread, 15...Bed, 18...Screw shaft, 21, 21a, 21b...
... Clamp roller, 22 ... Detector, 23 ... Pinch roll.

Claims (1)

[Scope of utility model registration request] A device for edge-milling the longitudinal side end of a horizontally transferred steel plate cross section using a bevel gear-like milling cutter arranged obliquely with respect to the steel plate, a cutter head that is swingable with a steel plate separation point as a swing fulcrum; A device for cutting a side end face in the longitudinal direction of a cross section of a steel plate, comprising a tilting device that swings a bevel gear-shaped milling cutter removably attached to the cutter head up and down together with the cutter head.