JPH09108725A - Surface trimming of metal slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a minimum cutting allowance and to remarkably improve yield in the surface trimming method of a metal slab by advancing and retreating cutters according to the surface data of the slab read out of a storage means. SOLUTION: Tip ball type contact sensors 30 and 50 are brought into contact with the surface of the slab W on a bed, moved relatively along prescribed measuring paths A and B, and surface positions of the slab W to the bed are measured at plural measuring points to automatically storage them into the storage means. Since tip ball type contact sensors are used, the highly precise measuring is performed without being affected by fine recessed holes in the slab surface. Next, the surface data at respective measuring points on cutting paths C and D are read out of the storage means, and surfaces of the slab W are cut along cutting paths C and D while advancing and retreating cutters 23 and 43 according to the read out data. In this case, the minimum cutting allowance required is allowed to set because cutters 23 and 43 are advanced and retreated according to the waviness correctly measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for caring for a surface of a metal slab, and more particularly to a method capable of improving a yield at the time of caring for a surface without causing an increase in equipment cost.

[0002]

BACKGROUND OF THE INVENTION The present invention can be applied to the surface care of various metal slabs such as titanium, copper and stainless steel. However, for the sake of convenience of explanation, a titanium slab will be described below as an example.
Generally, thick and thin plates of titanium are generally manufactured by hot rolling or cold rolling after forming a slab of titanium ingot by slab rolling or forging. If the titanium slab is hot-rolled and then cold-rolled while leaving skins and surface scratches, not only the surface quality of the product is very bad, but also cracks are caused.

Therefore, as shown in Japanese Patent Publication No. 59-16858, the slab surface is mechanically cut with a milling machine or a planer, or as shown in Japanese Patent Publication No. 51-18937, a slab surface is grinded. It is performed by grinding and caring for the surface of the titanium slab.

[0004]

However, not only the actual titanium slab has minute concave holes on the slab surface,
The slab has surface waviness due to heat distortion, etc.In the case of mechanical cutting, it is necessary to make the cutting allowance larger than the thickness of the surface black skin and the depth of surface scratches, resulting in poor yield and high raw material costs. I was invited. Therefore, it has been attempted to reduce the surface waviness of the slab by pressing, but there is a problem that a very large pressing device is required to press a hard titanium slab and the equipment cost becomes very high.

On the other hand, when the grinder is ground, the work characteristic thereof has little influence of the surface waviness on the grinding work, but the variation of the grinding allowance is apt to be large, and the yield is apt to be deteriorated in this respect. Also, since the hard surface black skin of the titanium slab is ground with a grindstone, the grindstone wears hard, and it is necessary to frequently replace the grindstone, which leads to cost increase, and the polishing burn on the titanium slab surface is likely to occur, There is a possibility that it may cause a surface defect of the titanium thick plate or thin plate. Further, there is a problem that not only the noise caused by the grinding work is large, but also the dust from the grindstone or the titanium slab is intense, and the working environment becomes very bad.

[0006] In view of the above problems, the present invention provides a method for cleaning the surface of a metal slab capable of reliably removing the surface black skin and surface scratches with a small cutting allowance without increasing the cost. It is an issue.

[0007]

Therefore, a method for caring for a surface of a metal slab according to the present invention is a method for caring for a surface of a metal slab used for manufacturing a metal thick plate or a thin plate. The slab is placed, the tip ball-type contact sensor is brought into contact with the slab surface, and the slab is moved relative to the slab along a predetermined measurement path, so that the slab surface position with respect to the bed is measured at a plurality of measurement points. After measuring and automatically storing the measurement result in the storage means, the data for each measurement point is read from the storage means, and the cutter of Planomira is moved relative to the slab along a predetermined cutting path, In addition, the slab surface is cut by advancing and retreating with respect to the slab surface according to the read data of each measurement point on the cutting path. To.

Although the tip ball type contact sensor is used for measuring the surface waviness of the slab, an optical sensor or a stylus type contact sensor can also be used. However, not only the surface waviness to be measured but also minute concave holes exist on the surface of the slab, and in the case of an optical sensor or a stylus contact sensor, such minute concave holes are also measured, resulting in a measurement error. Therefore, it is necessary to cut the measurement result of the minute concave hole with a filter or the like, which requires a complicated arithmetic circuit. On the other hand, when the contact sensor of the tip ball type is used, it is possible to secure high measurement accuracy without measuring the minute recessed hole. Therefore, it is preferable that the tip ball of the contact sensor has an outer diameter larger than that of the minute concave hole, which is less affected by the minute concave hole of the slab surface.

The measurement points on the surface of the slab may have a constant pitch regardless of the dimension of the slab, or may have a pitch obtained from the dimension of the slab and a predetermined number of measurement points. The relative movement between the contact sensor or the cutter and the slab is fixed by placing the contact sensor or the cutter, and the bed of the planomira on which the slab is placed may be moved according to the measurement path and the cutting path. Alternatively, the cutter may be moved according to the measurement path and the cutting path, or both may be moved so as to be along the measurement path and the cutting path as a whole.

One of the features of the present invention is that the waviness of the slab surface is previously measured and automatically stored in the storage means, and the stored measurement result is read out and cut by the planomira. Such a procedure can be executed by using a known control device having a built-in program for automatically performing this.

The slab measurement path and the cutting path may be the same path or different paths. Since the surface waviness of the slab is measured at multiple measurement points, when moving the Planomira cutter back and forth with respect to the slab, the surface position of each measurement point on the cutting path is changed to the surface position of the next adjacent measurement point. It is better to change it linearly. Also, the position of the measurement point is known in advance,
Alternatively, since the calculation can be easily performed from the measurement path and the pitch of the measurement points, if the cutting depth is controlled according to the measurement data of each measurement point, the yield can be further increased.

Assuming that the cutting path of the slab is such that the opposite outer edges of the uncut area of the slab surface are alternately moved in opposite directions, the cutting direction of the planomira cutter is always constant, for example, continuous downcut. The cutter life can be guaranteed.

[0013]

The slab and the contact sensor are moved relative to each other along a predetermined measurement path, the surface positions of the slab with respect to the bed are measured at a plurality of measurement points, and they are automatically stored in the storage means. At that time, the work efficiency is very high as compared with the case where the surface waviness of the slab is once measured and then manually stored in the storage means as in a normal NC device. Further, since the contact sensor of the tip ball type is used, the contact sensor is not affected by the minute concave holes on the surface of the slab, and high-precision measurement can be performed. Furthermore, depending on the slab, it may be placed on the bed with an inclination, and the degree of the inclination can be measured at the same time as the surface waviness.

Next, the surface data of each measurement point on the cutting path is read from the storage means, and the cutter of the planomira is moved relative to the cutting path while advancing and retracting according to the read data to cut the surface of the slab. Since the planomira cutter is advanced and retracted according to the accurately measured surface waviness and the inclination of the slab itself, the cutting allowance can be set to the necessary minimum and the yield can be greatly improved. Further, unlike the case where the surface waviness is shaped by a press, a large-sized press device is not required and the cost is not increased.

By the way, it is possible to continuously measure the surface waviness of the slab along the measurement path, but the data processing and the control of the cutter become very complicated. On the other hand, since the measurement is performed at a plurality of points with an appropriate pitch, data processing and cutter control can be easily performed.

Further, a method of providing a contact sensor in the front of the moving direction of the cutter and performing cutting by a copying method can be considered, but there is a concern that cutting chips are scattered and give a measurement error to the contact sensor. Also, when cutting the surface of a large slab, it is necessary to reciprocate the cutter several times,
How to use the contact sensor when changing the moving direction of the cutter and how to measure the surface waviness are important problems. On the other hand, since the measurement of the surface waviness and the cutting are performed in separate steps, the above-mentioned problems do not occur, and the work can be performed smoothly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the drawings. FIG. 1 shows a planomira used for surface care of the metal slab of the present invention. In the figure, a gate type frame 10 is erected on a floor surface F, and a cross rail 1 is provided between both side columns 11 of the gate type frame 10.
2 is laterally extended and supported, and the cross rail 12 is guided by the support columns 11 on both sides and is attached to the center of the horizontal support column 13 of the gate-shaped frame 10 for movement motor 1.
4 is moved in the vertical direction which is the Z-axis direction.

A front head 20 is attached to the cross rail 12.
While being guided by the cross rail 12, the front head 20 is moved in the left-right direction which is the Y-axis direction by the moving motor 21 attached to the end of the cross rail 12. Cutting drive means 24 including a drive motor is attached to the upper surface of the front head 20, a cutter 23 is fixed to the drive shaft 22, and the cutter 23 is rotated by the cutting drive means 24 and moved up and down. It is like this.

A side head 40 is supported on one of the columns 11 of the gate-shaped frame 10, and the side head 40 supports the column 1.
Motor for movement (not shown) while being guided by 1.
It is designed to move vertically. A cutting drive means 41 including a motor is attached to an outer surface of the side head 40, and a cutter 43 is attached to a drive shaft 42 thereof.
Is fixed, and the cutter 43 is rotated by the cutting drive means 41 and is moved back and forth in the lateral direction.

Contact sensors 30 and 50 are fixed to the front head 20 and the side head 40, and the contact sensors 30 and 50 are sensors by a driving means operated by supplying or energizing a fluid pressure such as air or hydraulic pressure. Head 31,
51 is provided so as to be able to advance and retreat downward or laterally, and balls are rotatably attached to the tip ends of the sensor heads 31 and 51 with attachment fittings. As shown in FIG. 3, the tip ball, for example, the ball 32 of the contact sensor 30, has a large outer diameter that is not affected by the minute recess 70.

A bed 15 is provided on the floor surface F between the gate-shaped frames 10, and a table 16 is provided on the bed 15 so as to be movable in the front-rear direction which is the X-axis direction. It is designed to be moved in the front-back direction. A pedestal 18 is placed on the table 16.
The titanium slab W to be surface-cleaned is mounted via 18.

Further, in the figure, reference numeral 60 is a control device having a microcomputer incorporated therein, which is functionally composed of control means 61 for performing various control of planomira and storage means 62 for storing the surface waviness measurement result. It

Next, the surface care method will be described.
When carrying out surface care of the titanium slab W, first, the table 16 is set to the initial position with respect to the bed 15, and the titanium slab W is placed on the table 16 via the pedestal 18.
After that, the cross rail 12 is lowered to a predetermined height, the front head 20 is moved to the initial position of the upper surface measurement path A, and the sensor head 31 of the contact sensor 30 is advanced to bring its tip ball into contact with the upper surface of the titanium slab W. At the same time, the side head 40 is moved to the initial height of the side surface measurement path B of the titanium slab W, and the sensor head 51 of the contact sensor 50 is advanced to bring its tip ball into contact with the side surface of the titanium slab W.

When the preparation for measurement is completed in this way, the table 16 is moved in the front-rear direction, and the titanium slab W with respect to the table 16 is moved at a predetermined pitch or at a plurality of measurement points at a pitch calculated from the number of measurement points of the titanium slab W. Measure the top surface height and side surface position of the. When one forward pass is completed, the front head 20 is moved laterally by a predetermined distance and the side head 40 is moved upward by a predetermined distance, and then the table 16 is moved in the opposite direction to the above, and a plurality of measurements on one return pass are performed. The top surface height and side surface position of the titanium slab W are measured at the points. The measurement of the side surface position of the titanium slab W is completed in one reciprocating path, but the upper surface height of the titanium slab W is the upper surface measurement path A shown in FIG. The measurement result is stored along with the position data of the measurement point in the storage means 62.

When the measurement of the surface waviness is completed, the table 16 is returned to the initial position and the sensor head 31 is retracted. Regarding the contact sensor 50 on the side, it is preferable to retract the sensor head 51 when the measurement on one round trip path is completed.

Next, the front head 20 is moved to the initial position of the upper surface cutting path C, the side head 40 is moved to the initial position of the side surface cutting path D, the cutters 23 and 43 are rotated, and the table 16 is moved in the front-back direction. At the same time, the upper surface height data and the side surface position data of the measurement points on the cutting paths C and D are read from the storage means 62, and the upper surfaces and the side surfaces of the titanium slab W are cut while the cutters 23 and 43 are moved back and forth.

At this time, the cutters 23 and 43 are preferably moved back and forth so as to linearly change between the cutting position of each of the plurality of measurement points and the cutting position of the next adjacent measurement point. For example, as shown in FIG. 3, the cutting positions P1 to P2 and P2 to P3 corresponding to the measurement points are changed linearly as indicated by a straight line E.

When the cutting of one forward path is completed, the front head 20 is moved in the width direction of the titanium slab W by the width of the upper surface uncut area, and the side head 40 is moved by the height of the side surface uncut area. And move it in the opposite direction,
1 Carry out the return trip. The side maintenance of the titanium slab W is now completed, and the upper side maintenance is performed in the same manner as in FIG.
The cutting is performed along the upper surface cutting path C shown in (b), that is, the path in which the opposite outer edges of the uncut area on the surface of the titanium slab W are alternately moved in opposite directions. In this case, since the cutter 23 always has the same cutting direction, that is, continuous downcut, the life of the cutter 23 can be guaranteed as compared with the case where the cutting direction is changed.

Although the cutting of the side surface of the titanium slab W is completed in one reciprocating path, the upper and lower edges of the titanium slab W are moved by using the movement of the table 16 during the next upper surface forward path cutting and the upper surface forward path cutting. Can be chamfered.

For the lower surface and the lower side surface, the titanium slab W is hung up and turned upside down, and the same maintenance as above is performed.

Thickness 130 to 250 mm, width 600 to 16
00mm, length 6000-9000mm, full length distortion 1
150 to 2 for a titanium slab W of 0 to 50 mm
When the method of the present invention was applied using a cutter with a diameter of 00 mm, it was confirmed that the surface can be maintained with a cutting allowance of 1 to 5 mm.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a planomira used for surface care of a metal slab of the present invention.

FIG. 2 is an explanatory diagram for explaining the maintenance method.

FIG. 3 is an enlarged view for explaining the maintenance method.

[Explanation of symbols]

 23 Cutter 30 Contact Sensor 32 Tip Ball 43 Cutter 50 Contact Sensor W Titanium Slab A Top Measurement Path B Side Measurement Path C Top Cutting Path D Side Cutting Path

Claims (4)

[Claims] 1. When caring for the surface of a metal slab used for manufacturing a metal thick plate or a metal thin plate, the slab is placed on a bed of Planomira, and a tip ball type contact sensor is brought into contact with the slab surface, Further, the slab surface position with respect to the bed is measured at a plurality of measurement points by moving the slab relative to the slab along a predetermined measurement path, and the measurement result is automatically stored in the storage means, and then the storage means. The data for each measurement point is read from, the planomira cutter is moved relative to the slab along the specified cutting path, and the slab surface is read according to the read data of each measurement point on the cutting path. A slab surface care method characterized by cutting the slab surface by advancing and retracting. 2. The method for surface-treating a metal slab according to claim 1, wherein the tip ball of the contact sensor has an outer diameter larger than that of the minute concave hole on the surface of the slab. 3. When the planomira cutter is moved back and forth with respect to the slab, the cutting position of each measurement point on the cutting path is linearly changed toward the cutting position of the next adjacent measurement point. The method for surface maintenance of the metal slab according to 1. 4. The method for surface-treating a metal slab according to claim 1, wherein the cutting path of the slab is a path for cutting while moving the opposite outer edges of the uncut area of the slab surface in opposite directions alternately.