JPH0890011A - Masher roll device - Google Patents

Abstract

PURPOSE: To correct burrs with cutting edges, to remove generated metal powder and to prevent the quality deterioration of a steel strip by attaching masher rolls to a part where a metallic strip is wound round a deflecter roll so that the burr parts with the cutting edges of the metallic strip are pressed. CONSTITUTION: The pass line of the steel strip 1 in the vicinity of side trimmers 2 is generally horizontal. Edge scraps 7 generated from the side trimmers 2 are elongated toward the lower side from the pass line. Then, the metallic deflecter roll 3 is provided so that the height of the lower end part of the roll is higher that of the pass line on the downstream side of the side trimmers 2. When the pass line of the steel strip is changed in the vertical upward direction by winding the strip round this roll 3 and the masher roll 4 is provided in the part where the steel strip 1 is wound round the deflecter roll 3, the position of the masher roll 4 is higher than the pass line at the side trimmers 2 and the edge scraps 7 generated with the side trimmers 2 are not wound round the masher roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masher roll device for crushing and correcting a collar portion produced by a trimming process such as a side trimmer or a slitter in a metal strip processing line for steel strips.

[0002]

2. Description of the Related Art In the process of manufacturing and processing a metal strip such as a steel strip (which will be described below as an example of a steel strip), a wide strip is divided into narrow strips or a shape-defective portion on both edges in the width direction. In order to remove the above, a slitting process or a trimming process in which the steel strip is continuously sheared by a pair of upper and lower rotary cutters set at predetermined positions in the width direction of the steel strip is generally performed.

Due to such processing, some "blade burr" occurs on the cut surface to some extent. Since the blade collar is work hardened and has a sharp shape, it is dangerous when handling steel strips, and there are problems such as gaps between layers when the steel strips are coiled or stacked. There is a need for a means for the blade to remove or straighten the burr.

FIG. 6 is a side view showing the main part of the blade burr straightening device disclosed in Japanese Patent Laid-Open No. 4-138805, in which a pair of upper and lower masher rolls 4a are provided so as to sandwich both ends of the steel strip 1.
Place a hard metal roll called 4b, and the blade has a collar
1a is crushed and corrected by the masher rolls 4a and 4b. In this example, the blade burr may be generated on either side of the steel strip 1, but in general, the direction in which the blade burr is generated is fixed and fixed depending on how the cutter of the trimming device is attached. Therefore, the Masha roll is steel strip 1
Only one side may be used, and the other may be an ordinary flat roll.

[0005]

In such a masher roll, the problem that the ear dust generated by the side drimers winds around the masher roll, and when the blade crushes the collar between the masher roll and the steel strip, metal powder is generated, There has been a problem that the metal powder is caught between the steel strip and the deflector roll and deteriorates the surface quality of the steel strip.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to realize a masher roll device which corrects the burr of the blade and removes the metal powder generated, so as not to deteriorate the quality of the steel strip. .

[0007]

DISCLOSURE OF THE INVENTION The present invention is a masher roll device for pressing a roll against a sheared surface of a metal strip after trimming to correct a burr caused by the trimming process. The deflector roll made of metal is arranged so that the part is above the height of the pass line, and the masher roll is attached to the part where the metal strip is wound around this deflector roll so that the blade of the metal strip presses the collar part. And more preferably, the above-mentioned masher roll device provided with a doctor knife in contact with the unwound part of the metal strip of the deflector roll.

[0008]

[Operation] Generally, the pass line of the steel strip near the side trimmer is horizontal. Further, the ear dust generated from the side trimmer extends downward from the pass line. Therefore, a metal deflector roll is installed downstream of the side trimmer so that the lower end of the roll is above the height of the pass line. , When the steel strip is installed on the part where it is wrapped around the deflector roll, the masher roll is located higher than the pass line on the side trimmer,
The ear dust generated by the side trimmer does not wind around the mash roll.

Further, the metal powder generated when the blade crushes the collar portion with the masher roll is caught between the steel strip and the deflector roll and is transferred to the surface of the steel strip to deteriorate the quality. Therefore, in the present invention, a doctor knife having a simple structure is installed in the deflector roll portion to remove the metal powder generated before the roll makes one revolution, so that the quality deterioration of the steel strip can be prevented. It was

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a configuration of a masher roll device according to the present invention. 1 is a steel strip, 2 is a side trimmer, 3 is a deflector roll, 4 is a masher roll, 6 is a doctor knife, and 7 is a doctor knife.
Is ear dust generated by the side trimmer.

The metal deflector roll 3 is installed downstream of the side trimmer 2 so that the lower end of the roll is higher than the pass line height, and the steel strip 1 is wound around the deflector roll 3. Mash roll 4 is installed sideways. After the steel strip 1 is cut off by the side trimmer 2, the pass line is bent vertically upward by the deflector roll 3 made of metal, and the blade of the edge portion of the steel strip 1 is crushed by the masher roll 4.

FIG. 2 is a partially enlarged view showing a portion of the mastic roll, and shows a state in which the blade collar portion 1a of the edge portion of the steel strip 1 wound around the deflector roll 3 is crushed by the mastic roll 4. Further, at this time, metal powder is prevented from being caught between the steel strip 1 and the deflector roll 3 to form a surface defect, and the roughness of the surface of the deflector roll 3 is reduced to prevent the roll from slipping. Therefore, it is more desirable to install the doctor knife 6 having a simple structure that comes into contact with the deflector roll 3 to remove the metal powder. Since the doctor knife 6 is installed at a portion where the steel strip 1 is not wound, the doctor knife 6 is located substantially on the opposite side of the mastic roll 4 as shown in FIG.

3 and 4 are a sectional view and a side view of the doctor knife 6. The doctor knife 6 has a doctor blade 9 mounted between a holder 8 made of chevron steel and a pressing plate 10 and the pressing force can be adjusted by changing the weight and the position of the pressing plate 10, as shown in FIG. The rotary shafts 11 attached to both ends of the holder 8 are fitted into brackets 12 each having a notch formed therein.

The bracket 12 is provided with stopper holes 16a and 16b, and the stopper pin 17 is inserted therethrough to prevent the doctor blade 9 from falling when worn as shown by an imaginary line 9a in FIG. Can be prevented. When the mash roll device of this example was installed in a steel strip processing line,
Problems such as ear dust from the side trimmer wrapping around the masher roll, and metal powder being caught between the roll and the steel strip in the line and the quality of the steel strip being inferior were resolved.

FIG. 6 is a graph showing how the roughness of the roll surface changes due to the pressing force (linear pressure) of the doctor knife.
When the rolling force was 2.0 kg / m, the roll surface roughness decreased sharply.Therefore, changing to a light reduction of 0.5 kg / m reduced the roughness decrease on the deflector roll surface and did not cause roll slip. , Good results were obtained.

[0016]

According to the present invention, there is an excellent effect that the problem that the ear scraps of the trimmer wind around the masher roll does not occur and that the surface defects of the steel strip can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an embodiment of the present invention.

FIG. 2 is a partially enlarged view showing an enlarged part of the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a doctor knife structure according to an embodiment of the present invention.

FIG. 4 is a side view showing the doctor knife structure of the embodiment of the present invention.

FIG. 5 is a graph showing a roll surface roughness lowering speed due to a rolling force of a doctor knife according to an embodiment of the present invention.

FIG. 6 is a side view of a muffler roll device showing a conventional technique.

[Explanation of symbols]

 1 Steel strip (metal strip) 1a Blade burr part 2 Side trimmer 3 Deflector roll 4, 4a, 4b Masher roll 6 Doctor knife 7 Ear scraps 8 Holder 9 Doctor blade 10 Holding plate 11 Rotating shaft 12 Brackets 16a, 16b Stopper hole 17 Stopper pin

Claims (2)

[Claims] 1. In a masher roll device for pressing a roll against a sheared surface of a metal strip after trimming to correct a burr by a trimming blade, a lower end portion of the roll has a pass line height downstream of a side trimmer (2). The deflector roll (3) made of metal is arranged so as to be more than the above, and the blade of the metal strip presses the collar portion (1a) to the portion where the metal strip (1) is wound around this deflector roll (3). The masher roll device is characterized in that the masher roll (4) is attached. 2. The masher roll device according to claim 1, wherein a doctor knife (6) is provided in contact with the unwound portion of the metal strip (1) of the deflector roll (3).