KR20030054510A - Method and Apparatus for Burr Removal from Strip - Google Patents

Abstract

PURPOSE: A method for forming burr on the central part of cutting surfaces of strip and an apparatus for removing burr on the central part of cutting surfaces of strip are provided to prevent damage of the roll surface due to burr by removing the burr after forming burr formed at a lower part of both cut surfaces of strip on the central part of both cutting surfaces of the strip. CONSTITUTION: In side trimming operation, the method for forming burr on the central part of cutting surfaces of strip comprises the process of forming burr(7) formed on a cutting part of both sides of a strip(5) on the central part of cutting surface of the strip(5) by descending an upper knife(4) to a point corresponding to 1/3 of a set wrap value and ascending a lower knife(6) to a point corresponding to 1/3 of the set wrap value. In a burr removal apparatus in side trimming operation, the apparatus for removing burr(7) on the central part of cutting surfaces of a strip(5) comprises an upper pressing roll having trapezoid shape in such a way that an end of the left side of the upper pressing roll is narrowly formed while an end of the right side of the upper pressing roll is widely formed; and a lower pressing roll having trapezoid shape in such a way that an end of the left side of the lower pressing roll is widely formed while an end of the right side of the lower pressing roll is narrowly formed oppositely to the shape of the upper pressing roll so that the burr(7) on the central part of the cutting surfaces of the strip(5) formed by the method is pressed and removed by the upper and lower pressing rolls.

Description

Burr removal method in the middle of strip cutting surface and burr removal device in the middle of strip cutting surface {Method and Apparatus for Burr Removal from Strip}

The present invention relates to an apparatus and a method for removing burrs generated from both side portions of a cut strip during side trimming operation of cutting a strip to an appropriate order width, and more particularly, in a side trimming operation. Burrs generated on both sides of the cut side of the strip are generated in the middle of both sides of the cut and then removed to prevent the damage of the roll surface caused by the burrs and strip cutting center center burr removing device It is about.

In general, the continuous line process is a reprocessing operation using a hot-rolled steel sheet, which makes the surface of the strip clean through several processes, and then performs a surface heating operation suitable for the annealing conditions while passing through the heating furnace. do.

Subsequently, the strip is subjected to a heat treatment suitable for the surface while passing through the annealing furnace, and the heat-treated strip is continuously flowed to a later process to finally be commercialized according to the requirements of the demand.

When the product is produced through the above process, the strip is processed in width according to the width required by the demand.

The width machining operation is performed by the upper and lower knives 4 and 6 of the side trimmer 2 (shown in FIG. 2) shown in FIG. 1A, by the upper and lower knives 4 and 6 of the side trimmer. When cutting the strip 5, burrs 7 (shown in FIG. 1B) are generated in the cut both sides of the strip.

That is, as shown in FIG. 1B, conventionally, the upper knife 4 and the lower knife 6 are operated without overlapping each other, and the lower knife 6 supports the strip at the bottom of the strip 5. In the upper knife 4, the strip is cut by pressing the strip on top of the strip supported by the lower knife.

In the cutting process, the side of the strip 5 is pressed downward by the cutting operation of the upper knife, and the burr 7 is generated at the bottom of the cutting strip.

At this time, since the upper knife is operated without overlapping the lower knife to the thickness of the strip, as shown in Figure 1c, the front end of the strip 5, the pressing surface (5a), the front surface 5b by the pressing of the upper knife ) And a fracture surface 5c in which the strip is cut naturally, and the end of the strip is separated from the fracture surface.

As the front end of the strip is made as described above, burrs are always generated at the lower end of the fracture surface 5c.

The generated burrs damage the surface of the roll 1 when the strip 5 is wound around the roll 1, as shown in FIG.

Therefore, a burr removing device is installed at the rear of the side trimmer 2 to remove the burr 7.

In the conventional burr removing device for removing the burr, a burmasha deflector roll is formed to support the upper and center portions of the upper side of the strip, and to remove the burrs at both ends of the lower side based on the strip. Edge processing roll (bur marsha roll) for is configured separately, is performing a burr removal operation.

However, while the burr is removed by pressing the edge portion of the strip through which the edge processing roll progresses during the burr removing operation by the burr removing device, the burr penetrates the burr deshaping roll holding the upper portion of the strip and rolls. There is a problem causing the mark, there was a problem that lowers the quality of the product thereby.

In addition, as the burr is not properly removed from the side trimmer during the operation, the surface of the rotary roll is damaged by the bur as the strip proceeds to a later process, and the surface of the rotary roll during frequent width conversion of the strip is generated. When the continuous operation is made due to the irregular wear on the surface of the rotary roll due to the damage of the stripping phenomenon occurs, this causes a problem that the process line is stopped to reduce the productivity.

The present invention has been made in order to improve the above-mentioned conventional problems, the center of the strip cutting surface to prevent the burrs from affecting the equipment by causing the burrs generated in the lower cutting surface of the strip to be generated in the center of the strip cutting surface Its purpose is to provide a method for generating burrs.

Another object of the present invention is to provide a strip cutting surface center burr removing apparatus capable of effectively removing burrs generated by the strip cutting surface center burr generating method.

Figure 1a is a schematic diagram showing a conventional burr generating apparatus

1B is a schematic diagram showing an operating state of a conventional burr generating apparatus.

1C is a cross-sectional view showing a cut surface of a strip by a conventional burr generating device.

2 is a state diagram showing a state in which a burr generated by a conventional burr generating device damages the roll surface of a later process.

3 is an overall schematic view showing a strip center burr removing device of the present invention;

FIG. 4 is an exploded perspective view showing the "A part (strip cutting surface center part burr generating device)" of FIG.

5 is an exploded perspective view showing part B (strip cutting surface center burr removing device) of FIG.

FIG. 6 is an exploded perspective view illustrating “C part” of FIG. 3;

Figure 7 is a schematic diagram showing the operation of the burr generating device for achieving the burr generating method in the center of the strip cut surface of the present invention

Figure 8 is a schematic view showing the operation of the strip cutting surface center burr removing apparatus of the present invention

Figure 9 is a schematic diagram showing the burrs in the middle of the strip cut surface generated by the strip cutaway center burr generating apparatus of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: roll 2: side trimmer

4: upper knife 5: strip

6: lower knife 7: bur

59: upper press roll 60: lower press roll

61, 61 ': motor 61c, 61c': PLG

As a means for achieving the above object, the strip cutting surface center burr generating method of the present invention, the upper knife is lowered to 1/3 of the set lap value (top to bottom), and 1/3 of the set lap value ( The lower knife is raised from the lower portion to the upper portion to form burrs formed on both side cut portions of the strip at the center of the strip cut surface.

In addition, the strip cutting surface center burr removing apparatus of the present invention has a trapezoidal shape in which the left end is narrowly formed and the right end is wide, and the left end is formed wide and the right end is narrow as opposed to the shape of the upper press roll. By forming a lower press roll having a trapezoidal shape to be formed, it is characterized in that the pressing of the center burr of the strip cut surface generated by the strip cutting surface center burr generating method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an overall schematic view showing the strip center burr removing apparatus of the present invention, Figure 4 is an exploded perspective view showing the "A part (strip cutting surface center burr generating device)" of Figure 3, Figure 5 is a portion B of the strip (strip cutting surface) Center burr removing device), FIG. 6 is an exploded perspective view showing part "C" of FIG. 3, and as shown in the drawing, in the strip center burr generating method of the present invention, a burr is formed at the center of the cut surface of the strip. Strip stripping surface center burr generating device for generating, strip stripping surface center burr removing device of the present invention, strip stripping surface center burr removal to remove the burrs of the strip cutting surface center generated by the method by the strip cutting surface center burr generating device. Configure with the device.

The configuration is described in detail as follows.

First, as shown in FIGS. 3 and 4, a method of generating a burr at the center of a strip cutting surface is performed by a burr generating device at a center of a strip cutting surface. The strip burr at the center of the strip cutting surface includes two slide guides 56 and one slide guide. A forward detecting sensor 50c and a backward detecting sensor 50b installed at the front and the rear, two T-shaped guide plates 55 respectively installed on the slide guide 56, and the center of the T-shaped guide plate 55 A screw 54 having a thread inserted into a threaded hole, a motor 51 connected to the screw through a flange 53 coupled to a bolt 52, a fixing stand 50a on which the motor 51 is seated, and the motor PLG 50 installed at the end of the motor to measure the rotational speed of the motor, the main base 57 is fixed to the upper surface of the T-shaped guide plate 55, two installed on the upper surface of the main base 57 Upper and lower bases 59a, 60a), slider bars 58a, 58b, 58c, and 58d for fixing the upper and lower bases 59a and 60a, respectively, a ball screw 70 inserted into a lower threaded hole of the lower base 60a, and the ball. Two rotors 62a to which the screw 70 is coupled, a timing belt 65a connecting the two rotors, a motor 61a to which the rotor (left side in the drawing) is mounted, and the rotor (drawings) PLG 61b coupled to the lower end of the upper right side, the fixed base 62b on which the rod 63a formed at the upper end of the rotor 62a (right side in the drawing) is mounted, and the upper thread of the upper base 59a. A ball screw 64 inserted into a hole, two rotors 62 to which the ball screw 64 is coupled, a timing belt 65 connecting the two rotors, and the rotor (left side in the drawing) A motor 61 to be mounted, a PLG 61c coupled to a lower end of the rotor (right side in the drawing) and a lower end of the rotor 62 (right side in the drawing) Fixed base 62c in which rod 63 is mounted, flanges 68 and 69 joined by bolts in the left part of the upper and lower bases 59a and 60a, and two gears to which the flanges are assembled, respectively. Gear box 66, a motor 67 is inserted into the inner shaft portion of the gear located at the top of the gear box 66, a fixed arm 67a, the motor 67 is seated, the upper and lower base 59a, 60a) is coupled to the right side of the upper and lower knives (4, 6) formed on one side of the cutting blade, respectively, is composed of the upper and lower knife axis.

Referring to the configuration of the knife with reference to the drawing shown in Figure 6 as follows. Since the configuration of the upper and lower knife is the same, the upper knife will be described as an example.

The upper knife 4 is inserted into the knife support 50, and then the support ring 41 is coupled, and a cover 42 is installed on the side of the support ring. And three loosening preventing buffer cores 43 and 44 are coupled to the cover by bolts 48 and 49.

The main feature of the above-described strip cutting surface center burr generating device is that the upper knife 4 moves downward, and the lower knife 6 moves upward.

That is, conventionally, only the upper knife is operated and the lower knife is fixed to improve the problem of generating burrs at the lower end of the strip cutting surface. The upper knife is also operated, and the lower knife is operated to generate burrs at the center of the strip cutting surface. Is to make it.

For example, when the thickness of the strip is 3mm, conventionally, the lower knife only serves to support the lower end of the strip, and as the upper knife lowers (laps) by about 2.mm relative to the thickness of the strip, Burrs were generated at the bottom.

However, in the present invention, as the upper knife descends 1.0 mm and the lower knife rises 1.0 mm, burrs are generated at the center portion of the strip cut surface as shown in FIG. 9.

That is, the upper knife is lowered to 1/3 point (upper to lower) with respect to the predetermined lap value, and the lower knife is raised to 1/3 point (lower to upper) with respect to the predetermined lap value.

The reason why the upper and lower knives are moved to one third of the lap value is that the wear of the upper and lower knives may occur due to excessive lap use (e.g., one-half point to the specified lap value—upper and lower knife overlaps). There is a problem in that the increase, and when using a less lap (for example, 1/4 point compared to a predetermined lap value) there is a problem that the strip is not cut.

3 and 5, the strip cutting surface center burr removing device has the same configuration as the strip cutting surface center burr generating device, and the upper and lower knives 4 and 6 of the strip cutting surface center burr generating device. Is different from the upper press roll 59 and the lower press roll 60, respectively.

This will be described in detail as follows.

Two slide guides 56 ', a forward detection sensor 50c' and a backward detection sensor 50b 'installed at the front and the rear of the one slide guide 50b', respectively installed on the top of the slide guide 56 ' Two T-shaped guide plates 55 ', threaded screws 54' inserted into the central threaded holes of the T-shaped guide plates 55 ', and bolts 52' coupled to the screws through a flange 53 'coupled thereto. A motor 51 ', a fixing table 50a' on which the motor 51 'is seated, a PLG 50' installed at an end of the motor to measure the rotational speed of the motor, and the T-shaped guide plate 55 ' Main base 57 'fixed to the upper surface of the upper side, two upper and lower bases 59a' and 60a 'installed on the upper surface of the main base 57', and the upper and lower bases 59a 'and 60a'. ) Slider bars 58a ', 58b', 58c 'and 58d' respectively fixing the ball screw 70 'inserted into the lower threaded holes of the lower base 60a', and Two rotors 62a 'to which the screws 70' are coupled, a timing belt 65a 'connecting the two rotors, a motor 61a' to which the rotor (left side in the drawing) is mounted, and PLG 61b 'coupled to the lower end of the rotor (right side in the drawing), a fixed base 62b' on which a rod 63a 'formed at the top of the rotor 62a' (right side in the drawing) is mounted, and A ball screw 64 'inserted into the upper threaded hole of the upper base 59a', two rotors 62 'to which the ball screw 64' is coupled, and a timing belt connecting the two rotors ( 65 '), a motor 61' on which the rotor (left side in the drawing) is mounted, a PLG 61c 'coupled to a lower end of the rotor (right side in the drawing), and the rotor 62' (in the drawing) A fixed base 62c 'to which the rod 63' formed at the bottom of the right side) is mounted, a flange 68 and 69 'joined by a bolt at the left side of the upper and lower bases 59a and 60a', Flanges each A gear box 66 'having two gears assembled therein, a motor 67' inserted into an inner shaft portion of a gear located at an upper end of the gear box 66 ', and a fixture on which the motor 67' is seated ( 67a '), and upper and lower push rolls 59' and 60 'coupled to the right side of the upper and lower bases 59a' and 60a 'are composed of assembled upper and lower push roll axes.

The main feature of the strip cut center central burr removal device is the shape of the upper press roll and the lower press roll.

That is, as shown in FIG. 5, the upper press roll 59 has a trapezoidal shape in which the left end is narrowly formed and the right end is wide, and the lower press roll 60 is opposite to the shape of the upper press roll. The left end is wide and has a trapezoidal shape in which the right end is narrow.

Therefore, the strip cut surface center burr generated by the strip cut surface center burr generating device is pressed and removed by the operation of the upper and lower push rolls having the above-described shape.

Hereinafter, the operation of the present invention will be described.

When data values for the thickness and width of the strip inputted to the computer are transmitted to the PLC (not shown), the set lap value in the PLC is transmitted to the side trimmer, in which the upper and third parts of the set lap value are transferred. Lower knife 4, 6 is lowered and raised, respectively.

That is, the rotation speed of the upper motor 61 is counted by the PLG 61c to lower the upper knife 4 by 1/3 of the lap value transmitted from the PLC, and the rotation speed of the lower motor 61a is set by PLG ( In step 61b), the lower knife 6 is raised by 1/3 of the lap value transmitted from the PLC.

As a result, the strip is cut, and a burr 7 (shown in FIG. 9) is generated at the center of the cut surface of the strip.

Then, when the strip is transferred to reach the removal device of the present invention, the upper and lower push rolls 59 and 60 of the removal device are moved by the PLGs 61c 'and 61b' of the motors 61 'and 61a'. It is controlled to lower and raise the upper and lower press rolls. Accordingly, the burr formed at the center of the cut surface of the strip is removed as the upper and lower pressing rolls are pressed.

7 is a schematic view showing the operation of the burr generating device for achieving the strip cutting surface center burr generating method of the present invention, Figure 8 is a schematic view showing the operation of the strip cutting surface center burr removing apparatus of the present invention.

As described above, by generating the burrs generated at the lower sides of the cut sides of the strip during the side trimming operation according to the strip cutting surface center burr generating method of the present invention, the surface of the roll surface due to the burrs is generated. Damage can be prevented, and furthermore, by efficiently removing the burr by the strip cutting surface center burr removing apparatus of the present invention, it is possible to prevent productivity decrease due to burr generation.

Claims (2)

In the side trimming operation, the upper knife 4 is lowered to one third of the set lap value (upper to lower) and the lower knife 6 to one third of the set lap value (lower to upper). And a burr (7) formed at both side cut portions of the strip (5) to be formed at the center of the cut surface of the strip (5). In the burr removing device for side trimming, the upper end roll 59 has a trapezoidal shape in which the left end is narrow and the right end is wide, and the left end is wide in opposition to the shape of the upper press roll 59. And forming a lower press roll 60 having a trapezoidal shape having a narrow right end, and pressing and removing the center burr 7 of the cut surface of the strip 5 generated by the method of generating the center burr of the strip cutting surface of claim 1. Strip burr center portion burr removal device.