JP6402560B2 - Cutting method and equipment - Google Patents

Description

  The present invention relates to a cutting method and cutting equipment for cutting the surface of a workpiece such as a continuous cast slab.

  In a continuous casting facility, a slab is continuously produced from molten steel, and the slab is cut into a length of about 10 m and sent to a hot rolling line in the next process as a rolling material. For such a slab, the surface is cut using a cutting device for the purpose of surface care or the like.

  When cutting the surface of a slab using a cutting jig (milling cutter), a technique described in Patent Document 1 is known as a technique capable of performing good cutting even when deformation such as warpage exists on the surface of the slab. ing.

  The technique of Patent Document 1 detects deformation in the cutting direction of the slab surface, and based on the detected value, the milling surface of the cutting jig is inclined in the cutting direction with respect to the perpendicular, and the cutting jig is deformed in the slab. It is to cut while moving up and down following.

  The cutting device has a machining head, a cutting jig attached to the tip of the spindle of the machining head, and a motor attached to the upper part of the machining head and for rotating the cutting jig via the spindle. When the cutting jig is tilted, it is tilted together with the machining head and the motor.

JP 59-14015 A

  By the way, when cutting a slab with a cutting device, it is required to efficiently perform the cutting process. For this reason, it is required to increase the capacity of the motor. However, if the motor capacity is increased, the weight of the motor increases. In addition, since the cutting resistance increases, it is not practical to tilt the cutting jig together with the machining head and motor according to the gradient of the slab because it is necessary to increase the rigidity of the main body for supporting the machining head and motor. .

  Therefore, an object of the present invention is to provide a cutting method and a cutting equipment that can perform appropriate cutting according to deformation of a workpiece without tilting the processing head of the cutting apparatus.

  In order to solve the above problems, the present invention provides the following (1) to (8).

(1) a step of placing a workpiece on a bed;
Measuring the amount of deformation of the workpiece on the bed;
Tilting the bed by a predetermined amount in a predetermined direction so that appropriate cutting can be performed based on the deformation amount of the workpiece;
And a step of cutting the workpiece with a cutting device.

  (2) The cutting apparatus includes a processing head having a main shaft, a cutting jig attached to the main shaft of the processing head, and a motor that rotates the cutting jig together with the main shaft. The cutting method according to (1), wherein the surface of the workpiece is cut with a cutting tip of the cutting jig while rotating the cutting jig.

  (3) The step of tilting the bed is characterized by tilting the bed by lifting and lowering a corresponding portion of the bed by lifting and lowering a plurality of lifting actuators provided below the bed. The cutting method according to (1) or (2).

  (4) The step of measuring the amount of deformation of the workpiece is performed using a laser distance meter or camera which is a non-contact type measuring device, or a touch probe which is a contact type measuring device (1) To (3).

(5) a bed on which the work material is installed;
A cutting device for cutting the surface of the workpiece;
Deformation amount measuring means for measuring the deformation amount of the workpiece on the bed;
Bed tilting means for tilting the bed;
And a control unit that controls the tilting of the bed by the bed tilting means based on the deformation amount of the deformation amount measuring means.

  (6) The cutting apparatus includes a processing head having a main shaft, a cutting jig attached to the main shaft of the processing head, and a motor that rotates the cutting jig together with the main shaft. The cutting equipment according to (5), wherein the surface of the workpiece is cut with a cutting tip of the cutting jig while being rotated.

  (7) The bed tilting means includes a plurality of lifting actuators provided below the bed, and lifts the plurality of lifting actuators to raise and lower corresponding portions of the bed, thereby moving the bed. The cutting equipment according to (5) or (6), wherein the cutting equipment is tilted.

  (8) The deformation amount measuring unit includes a laser distance meter or a camera which is a non-contact type measuring device, or a touch probe which is a contact type measuring device, according to any one of (5) to (7) The listed cutting equipment.

  According to the present invention, since the work material is cut by tilting the bed that holds the work material, appropriate cutting can be performed according to the deformation of the work material without tilting the work head. it can.

It is sectional drawing which shows the cutting equipment which concerns on one Embodiment of this invention. It is a top view showing cutting equipment concerning one embodiment of the present invention. It is a flowchart which shows the cutting method by the cutting equipment shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a sectional view showing a cutting equipment according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. In this embodiment, a description will be given by taking as an example a cutting facility for milling the surface of a slab after continuous casting.

  The cutting equipment 100 according to the present embodiment is configured as a portal machine, and includes a bed 11 on which a slab 1 as a workpiece is installed, a rail 12 provided on both sides of the bed 11, and a rail 12. A movable frame 13, a cutting device 14 movably attached to the frame 13, a slab deformation amount measuring device 15 for measuring the deformation amount of the slab 1, and a bed tilting mechanism 16 for tilting the bed 11. And a control unit 17.

  As shown in FIG. 2, the slab 1 is positioned on the bed 11 with the longitudinal direction sandwiched between the fixed block 21a and the movable block 21b, and the movement of the slab 1 is suppressed. The position of the movable block 21 b can be adjusted by the actuator 22. The slab 1 is installed at a predetermined position on the bed 11 by an overhead crane (not shown). In addition, in order to suppress the movement of the slab 1 more reliably, two pairs of fixed blocks and movable blocks may be provided in the width direction of the slab 1.

  The frame 13 has two columnar portions 32 each having a slider 31 fitted to the rail 12 at a lower end portion, and a horizontal portion 33 that connects the two columnar portions 32. Then, when the slider 31 moves along the rail 12 by a drive mechanism (not shown), the frame 13 is moved on the rail 12 in the longitudinal direction of the slab 1.

  The cutting device 14 is a machining head having a main shaft provided so as to be movable in the vertical direction and the width direction of the slab 1 along a guide mechanism (not shown) attached to the frame 13 by a drive mechanism (not shown). 41, a milling type cutting jig (milling cutter) 42 attached to the main shaft of the processing head 41, and a motor 43 provided on the processing head 41 and rotating the cutting jig 42 together with the main shaft. The milling-type cutting jig 42 has a plurality of cutting tips (not shown) attached to the periphery of the lower surface of the disc-shaped main body, and rotates to cut the surface of the slab 1 with the cutting tips. It has become.

  As the slab deformation measuring device 15, a non-contact type measuring device such as a laser distance meter or a camera, or a contact type measuring device such as a touch probe is used. The laser distance meter and the touch probe obtain the deformation amount of the slab 1 by measuring the distance to the slab 1 while scanning. When a camera is used, the deformation amount of the slab 1 is measured by performing image processing on the captured image.

  The bed tilting mechanism 16 has a plurality of lift actuators 51 provided below the bed 11, and lifts and lowers the corresponding parts of the bed 11 by moving the plurality of lift actuators 51 up and down, thereby moving the bed 11 in a predetermined direction. Tilt to a predetermined amount. As the elevating actuator 51, either a jack method or a hydraulic cylinder method can be adopted. In any system, stroke amount data is required to grasp the lift amount of the lift actuator 51 when the bed 11 is tilted. In the jack method, the rotation detector is used. In the hydraulic cylinder method, the stroke is used. It can be obtained by using a sensor or the like. Further, the number of lifting actuators 51 is not particularly limited, and may be set as appropriate according to the size of the bed 11 and the like. As a suitable example, four can be mentioned.

  The control unit 17 acquires the data of the slab deformation amount measured by the slab deformation amount measuring device 15 and gives an elevation command to the elevation actuator 51 of the bed tilting mechanism 16 based on the data. At this time, the stroke amount of the lift actuator 51 is acquired from a rotation detector or a stroke sensor built in the lift actuator 51, and the lift amount of the lift actuator 51 is calculated based on the stroke amount.

  Next, the cutting method in the cutting equipment 100 comprised in this way is demonstrated based on the flowchart of FIG.

  First, the slab 1 is installed on the bed 11 with an overhead crane or the like (step 1). At this time, the slab 1 is positioned in a state of being sandwiched between the fixed block 21a and the movable block 21b. In this state, the deformation amount (gradient) of the slab 1 on the bed 11 is measured by the slab deformation amount measuring device 15 (step 2). Then, based on the measured deformation amount of the slab 1, the bed tilt mechanism 16 tilts the bed 11 in a predetermined direction by a predetermined amount so that appropriate cutting can be performed (step 3). Thereafter, the surface of the slab 1 is cut by the cutting device 14 (step 4).

  In this case, the measurement data of the slab 11 measured in the step 2 is sent to the control unit 17, and the control unit 17 obtains the deformation amount (gradient) of the slab 1 based on the coordinate value of the measurement result, and based on that. Thus, the step of tilting the bed 11 in step 3 is realized by giving a lift command to the lift actuator 51 of the bed tilting mechanism 16 so that optimum cutting can be performed.

  In the slab tilting step of step 3, after the bed tilting mechanism 16 is tilted as described above, the slab 1 is again measured by the slab deformation amount measuring device 15, and then the cutting is performed by the cutting device 14 of step 4. Preferably it is done. Thereby, cutting with higher accuracy can be performed. Note that the slab 1 can be cut by tilting the bed in real time while cutting.

  Cutting of the slab 1 by the cutting device 14 in step 4 is performed by adjusting the position of the cutting device 14 and rotating the cutting jig 42 while the frame 13 is running along the rail 12, thereby cutting the cutting tip of the cutting jig 42. This is done by cutting the surface of the slab 1 by means (not shown).

  Thus, since the bed 11 holding the slab 1 is tilted and the slab 1 is cut, appropriate cutting can be performed according to the deformation of the slab without tilting the machining head 41.

  When the machining head is inclined at a certain angle as in Patent Document 1, in order to cut with high yield while suppressing excessive cutting, it is necessary to cut from a cutting direction corresponding to the deformation direction of the slab, and the slab continuously. Can not be cut, it takes time. In addition, when cutting with priority given to shortening the time without considering the cutting direction, the cutting allowance is partially increased, the yield is deteriorated, and the part where the cutting width is narrowed is generated, There may be a case where the number of passes during cutting increases and more time is required.

  On the other hand, in this embodiment, since the bed 11 can be tilted in a desired direction in accordance with the deformation of the slab 1, cutting in one direction is possible without reducing the yield.

  Further, when cutting, there are an up-cut method in which the cutting direction in the slab 1 and the moving direction of the cutting jig 42 coincide with each other, and a down-cut method in which the cutting direction and the moving direction are opposite to each other. In order to manage the life, it is preferable to always use a fixed method. However, in this embodiment, the bed 11 is tilted in a desired direction in accordance with the deformation of the slab 1, so that this is easily realized. can do. In particular, by always using the down-cut method, in addition to the effect of making the blade life constant, the effect of extending the blade life can also be obtained.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the said embodiment, although shown about the case where the slab after continuous casting was applied as a workpiece, a workpiece is not restricted to this. Moreover, in the said embodiment, although the cutting equipment was comprised as a portal type processing machine, if a workpiece is installed and cut on a bed, an equipment structure will not be limited.

1 Slab (work material)
DESCRIPTION OF SYMBOLS 11 Bed 12 Rail 13 Frame 14 Cutting apparatus 15 Slab deformation measuring device 16 Bed tilt mechanism 17 Control part 21a Fixed block 21b Movable block 22 Actuator 31 Slider 32 Column-shaped part 33 Horizontal part 41 Processing head 42 Cutting jig 43 Motor 51 Lifting actuator 100 cutting equipment

Claims (8)

Positioning the workpiece on the bed;
Measuring the amount of deformation of the workpiece on the bed;
Tilting the bed by a predetermined amount in a predetermined direction so that appropriate cutting can be performed based on the deformation amount of the workpiece;
And a step of cutting the workpiece positioned on the bed by moving a cutting jig of a cutting apparatus without tilting the cutting jig . The cutting device comprises a machining head having a major axis, the said cutting jig mounted on the spindle of the machining head, and a motor for rotating the cutting tool with the spindle, the cutting step, the cutting The cutting method according to claim 1, wherein the surface of the workpiece is cut with a cutting tip of the cutting jig while rotating the jig.   2. The step of tilting the bed includes tilting the bed by lifting and lowering a corresponding portion of the bed by lifting and lowering a plurality of lift actuators provided below the bed. Or the cutting method of Claim 2.   The step of measuring the amount of deformation of the workpiece is performed using a laser distance meter or camera that is a non-contact type measuring device, or a touch probe that is a contact type measuring device. 4. The cutting method according to any one of 3 above. A bed on which the workpiece is positioned;
A cutting device having a cutting jig for cutting the surface of the workpiece;
Deformation amount measuring means for measuring the deformation amount of the workpiece on the bed;
Bed tilting means for tilting the bed;
A controller that controls the tilting of the bed by the bed tilting means based on the deformation amount of the deformation measuring means;
The control unit tilts the bed by a predetermined amount in a predetermined direction based on the deformation amount of the workpiece measured by the deformation amount measuring means, and is positioned on the bed. and the workpiece, cutting equipment, characterized by cutting without tilting the cutting tool by moving the cutting tool of the cutting device. The cutting device comprises a machining head having a major axis, the said cutting jig mounted on the spindle of the machining head, and a motor for rotating the cutting tool with the spindle, rotates the cutting tool 6. The cutting equipment according to claim 5, wherein the surface of the workpiece is cut with a cutting tip of the cutting jig.   The bed tilting means includes a plurality of lifting actuators provided below the bed, and tilts the bed by lifting and lowering the corresponding parts of the bed by lifting and lowering the plurality of lifting actuators. The cutting equipment according to claim 5 or 6, wherein:   8. The deformation amount measuring unit includes a laser distance meter or a camera which is a non-contact type measuring device, or a touch probe which is a contact type measuring device. Cutting equipment.

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