KR20040006698A - Apparatus for reducing width difference in connecting parts of advancing strip and escorting strip - Google Patents

Abstract

PURPOSE: An apparatus for reducing the width difference in connection part of preceding strip and following strip is provided to improve productivity and reduce cost by cutting the width difference of preceding strip having the minimum width and following strip having the maximum width in a tapered shape at the same time. CONSTITUTION: In an apparatus for reducing width difference of preceding strip and following strip of continuous strip production process which is installed in rear of welding machine in the continuous strip production process to reduce the connection width difference of the preceding strip and the following strip so that strip (S) is smoothly proceeded, the apparatus comprises upper and lower supporting rollers(120,121) installed in a width direction of the strip at one side of base(110) installed under the strip (S); transfer blocks(130) respectively installed at both sides of another side of the base(110) in such a way that the transfer blocks(130) are moved in the width direction of the strip by a moving means; a cutter housing(150) rotationally installed at one side of the transfer blocks(130); and cutters(160) installed at both sides of the cutter housing(150).

Description

Apparatus for reducing width difference in connecting parts of advancing strip and escorting strip}

The present invention relates to a device for reducing the connection width between the preceding steel plate and the following steel plate, and more particularly, the connection width difference between the preceding steel plate and the following steel plate when changing the roll unit. In the process of cutting the gap between the widths of the leading and trailing steel plates), the gap between the connecting plate widths of the minimum width of the leading steel plate and the maximum width of the trailing steel plate is temporarily changed without any plate overlap or intermediate material input. The present invention relates to a device for reducing the connection width between the leading steel plate and the following steel plate, which can be cut into a tapered shape.

In general, the production line for continuous working on the steel sheet is provided with a cold rolling mill or a temper rolling mill in order to meet the dimensions required by the consumer at the rear end of the steel sheet, a number of work rolls are installed in the cold rolling mill, the work roll To maintain the service life of a certain time and to set a certain amount of work in advance for a product of excellent quality. At this time, the work unit is called a roll unit.

One roll unit starts at the maximum width and sequentially decreases to finish at the minimum width according to the process specification, in which case the working rolls are replaced in full and the work is restarted in new roll units again.

When changing to a new roll unit, because the steel sheet grows rapidly from the minimum width to the maximum width, it is frequently caused by the difference in the width of the steel sheet in the production line, causing the steel sheet to bend or overlap with adjacent equipment.

In this case, when the steel sheet (strip) is rapidly changed from the maximum width to the minimum width, an intermediate material is used therebetween. As the intermediate material, two to three pieces having a connection width difference between the preceding steel plate and the following steel plate within 200 mm are used. We are working by welding the strip ends.

Figure 1 shows a conventional example of the connection width reduction device of the preceding steel plate and the following steel plate, is moved along the guide rail (2) of the base (1), the pedestal on which the tip of the steel sheet (strip) (S) is placed ( 3), the moving cylinder 4 which moves the said base 3, the notch 4 which raises and lowers on both sides of the base 3, and removes the connection part (welding part) of the steel plate S, and the base It consists of the cylinder 5 which moves (3).

In the conventional device for reducing the connection width of the preceding steel plate and the following steel plate configured as described above, when the width difference of the connecting steel sheet is within 150 mm so as not to disturb the movement of the steel sheet by the connecting portion during the advancing of the steel sheet (strip), it is notched once. When the width difference of the connection steel plate is less than 250 mm, it is notched twice. When the connection strip width difference is less than 350 mm, it is manually notched three times or more from the beginning.

However, in the line of continuous production of steel sheets as in the prior art, there is a problem in that productivity is lowered because the connection parts of the steel sheets must be notched several times so that the steel sheets do not hit or overlap adjacent equipment.

In addition, Figure 2 shows another conventional example of the connection width reduction device of the preceding steel plate and the following steel plate, the transport block 12 is installed along the guide rail 11 of the base 10 to be transported, the transport block 12 is configured to be movable by the feed screw 14 of the motor 13. And the cutter 15 is configured to cut the steel sheet (S) while the angle adjustment on the transfer block 12.

In the conventional device for reducing the connection width of the preceding steel plate and the following steel plate, the cutter cuts a certain length of the steel plate into a tapered shape. When the connection width difference between the preceding steel plate and the following steel plate is large, it is difficult to process the discharge scrap (cut part). Since the cutter cannot cut all the parts to be cut at once, it should be cut slowly while feeding repeatedly. Therefore, there is a problem that the work time is delayed and workability is inferior.

The present invention has been invented to solve the above problems, the object of which is the minimum width in one operation without the overlap of the plate or the intermediate material in the process of cutting the connection plate width difference portion of the preceding steel plate and the following steel plate when changing the roll unit It is possible to cut the connection width difference between the leading steel plate and the largest steel plate in the form of a taper at a time to prevent the equipment trouble when the width is reversed from the minimum width to the maximum width in advance to improve productivity and reduce cost An object of the present invention is to provide a device for reducing the difference in connection width between the preceding steel plate and the following steel plate.

1 is a view showing a conventional example of the connection width reduction device of the preceding steel and the following steel sheet

Figure 2 is a view showing another conventional example of the connection width difference reducing device of the preceding steel plate and the following steel sheet

3 is a process chart showing a steel sheet continuous production line

Figure 4 is a perspective view showing a connection width difference reducing device of the preceding steel plate and the following steel plate of the present invention

5 is an exploded perspective view showing a connection width difference reducing device of the preceding steel plate and the following steel plate of the present invention

Figure 6 is an exploded perspective view of the main portion of the present invention

※ Explanation of symbols about main part of drawing ※

20: coil car 21: face off reel

22 processor 23 photo sensor

24: dividing share 25: welding machine

26: mail order table 27: tension bridal roll

S: Steel Plate 110: Base

120,121: upper and lower support rollers 120a: bearing block

121a: frame 120b: lifting cylinder

130: transfer block 140: moving means

141: guide bar 142: feed screw

143: drive unit 150: cutter housing

160: Cutter

Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

The structure of the present invention is installed at the rear of the welding machine in the continuous steel sheet production process, and the connection width difference between the leading steel plate and the trailing steel plate in the continuous steel sheet production process to reduce the connection width difference between the preceding steel plate and the trailing steel sheet for the smooth progress of the steel sheet In the apparatus, one side of the base provided in the lower portion of the steel plate is installed in the upper and lower support rollers in the steel plate width direction, and on both sides of the base, respectively, the transport block is installed to be movable in the steel plate width direction by the moving means, The cutter housing is rotatably installed at one side of the block, and the cutters are installed at both sides of the cutter housing.

The transfer block moving means has two guide bars installed on the upper surface of the base parallel to the upper and lower support rollers, and the transfer bars are movably fitted between the guide bars, and a transfer screw is driven between the guide bars. It is installed to be rotated and the transfer block is screwed to the transfer block to be transported.

Both ends of the lower support roller are supported by a frame installed in the base, both ends of the upper support roller are supported by a bearing block, and the bearing block is installed to be elevated by a lifting cylinder.

Hereinafter, a brief description of the steel sheet continuous production process to which the present invention is applied before explaining the configuration of the present invention.

3 is a steel sheet continuous production process diagram, in the steel sheet continuous production process to guide the coil car 20 to prepare the coil steel sheet, the face-off reel 21 for unwinding the steel sheet after charging, and the plate of the coil steel sheet (S) A welding machine having a processor 22, a photosensor 23 for judging the presence or absence of a steel plate, a dividing share 24 for cutting the defective portion of the tail portion, and a notch 4 to connect the tip of the preceding steel plate and the following steel plate. 25, a plate plate 26 for moving the steel sheet (strip), and a tension bridle roll 27 for stripping the steel sheet from the pay off reel 21 to form a strip.

Figure 4 is a perspective view showing a connection width difference reducing device of the preceding steel plate and the trailing steel plate of the present invention, Figure 5 is an exploded perspective view showing a connection width difference reducing device of the preceding steel plate and the trailing steel plate of the present invention, Figure 6 is the present invention Is an exploded perspective view of the excerpts.

3 to 6, the apparatus for reducing the width difference between the connection of the preceding steel plate and the following steel plate in the continuous steel sheet production process of the present invention is installed at the rear of the welder 25 in the steel sheet continuous production process of the steel sheet (S) In order to smoothly proceed, it is configured to reduce the connection width difference between the leading steel plate and the following steel plate.

That is, the upper and lower support rollers 120 and 121 are installed at one side of the base 110 installed below the steel plate S in the steel plate width direction, and both ends of the lower support roller 121 are supported by the support 121a and the support ( The lower end of 121a) is welded to the bottom surface of the base 110. The lower support roller 121 serves to prevent the shaking of the steel sheet when cutting the steel sheet (S: strip).

On both sides of the other side of the base 110, the transfer block 130 is installed to be movable in the steel plate width direction by the moving means 140, respectively.

In other words, the guide block 141 is installed on the upper surface of the base 110 as the transfer block moving means 140 in parallel with the upper and lower support rollers 120 and 121, and the transfer block 130 is provided on the guide bar 141. It is fitted to be movable.

Both ends of the guide bar 141 are formed in a semi-circle shape so that the guide bar 141 does not go round or move, and both sides of the back of the base 110 supporting the guide bar 141 are also semi-circular. Both ends of the 141 are fastened to the bolt B by the fixing clamp 141a.

The transfer screw 142 is installed to be rotated by the driving unit 143 between the guide bars 141, and the transfer block 130 is screwably coupled to the transfer screw 142.

In other words, two guide bars 141 are inserted through two through holes H1 formed on the front surface of the transfer block 130, and a feed screw 142 is inserted through one through hole H2. .

Since the transfer screw 142 and the transfer nut 130a of the transfer block 130 are screwed together, the transfer block 130 moves along the transfer screw 142 when the transfer screw 142 is rotated. The guide bar 141 guides the transfer of the transfer block 130.

Since one end of the feed screw 142 is a free end and the other end is connected to the drive unit 143, the feed screw 142 is configured to rotate by the rotational force of the drive unit 143.

The driving unit 143 is divided into a geared motor 143a and a PEL (pulse generator: 143b), which are connected by a coupling 143c and are fastened to one side of the base 110 by a bolt (B).

The cutter housing 150 is rotatably installed at one side of the transfer block 130, and the cutter 160 is installed at both sides of the cutter housing 150.

The left and right cutter housings 150 are formed in a curved shape when viewed from the upper portion of the straight direction, and the horizontal bearing seating holes H passing through the upper and lower collinear lines are arranged such that the circular cutters are overlapped by about 2 mm. And a secondary scrap discharge port gradually expanded in the direction of the line so that secondary scraps are smoothly discharged between the bent vertices (four bearing seating holes in two equal parts up and down) between the upper and lower bearing seating holes (H). Formed.

In addition, the left and right cutter housing 150 is configured to meet at right angles to the center line of the bearing seating hole (H) and the extension line of the shaft when viewed in plan view, the cutter housing 150 is configured to rotate about the axis (150a), The angle of the cutter housing 150 is adjusted by the cylinder 150b.

In addition, the edge around the through hole 150c should be properly chamfered so that the cutter housing 150 can be smoothly rotated.

In addition, a bracket 150d for connecting the cylinder 150b at a predetermined length in the longitudinal direction of the cutter housing 150 is installed, and the cutter seat hole H of the cutter housing 150 has a cutter by the shaft e. At the same time as the 160 is rotatably installed, a protective cap (f), a retainer (g), a bearing (h) and the like are installed.

Both ends of the lower support roller 121 are supported by the frame 121a installed on the base 110, both ends of the upper support roller 120 are supported by the bearing block 120a, and the bearing block 120a is It is installed to be raised and lowered by the elevating cylinder 120b. Here, the guide grooves R1 and the guide rails R2 are formed at both sides of the bearing block 120a and both sides of the base in contact with the bearing block 120a.

Reference numeral V denotes a cover to prevent dust or the like from entering the transfer block.

The connection width difference reducing device 100 of the preceding steel plate and the following steel plate of the present invention configured as described above is typically installed between the back of the welder 25 and the tension bridal roll 27, and the line PEL ( (Not shown) detects the difference in width between the leading strip and the trailing strip.

At this time, when the width difference between the preceding steel plate and the following steel plate does not exceed 150 mm, the line PEL drives the payoff reel 21 and the tension bridal roll 27 sections (hereinafter referred to as interlocking sections) after the welding is completed. Then, the welding part (connecting part of the leading steel plate and the following steel plate) is moved, and at this time, the calculation distance is calculated according to the pulse value of the PIL installed at the rear end of the tension bridal roll 27.

When the welded part of the steel plate is located in the notch (4) position, the interlocking section is stopped again. At this time, the notch (4) descends to complete the notching work (removing the width difference generated in the welded part of the leading and trailing steel plates). End the job.

If the difference between the width of the preceding steel plate and the following plate detected by the line PI exceeds 150 mm, the linkage section is driven again and the welded portion of the steel sheet is moved to the notch position.

Afterwards, the cylinder 120b is operated to lower the bearing block 120a. At this time, the bearing block 120a is smoothly lowered by the guide rail R1 and the guide groove R2.

The upper support roller 120 supported by the bearing block 120a presses down the steel sheet (strip) S by the lowering of the bearing block 120a, wherein the steel sheet S is formed by the lower support roller 121 and the upper portion. Located between the support rollers 120 does not shake even during the cutting operation.

At this time, the cylinder (150b) is operated to pull the cutter housing 150 inward, the cutter housing 150 is narrowed inward while rotating about the axis (150a), the gear motor 143a is a width adjustment motor Perform APC (Auto Position Control) of minimum width (leading strip width). Here, when the feed screw 142 rotates by the operation of the gear motor 143a, the feed block 130 is transferred along the feed screw 142.

The calculation distance is automatically calculated according to the pulse value of the PIL (not shown) installed at the rear end of the tension bridal roll 27. When the welded portion of the steel sheet reaches the notch position, the interlocking section is stopped and the steel sheet S is Punch a line tracking hole in the weld and complete the work.

When the gear motor 143a rotates the feed screw 142 and transfers the feed block 130, and completes the APC of the minimum width (width of the leading strip) of the steel plate S, the interlocking section is driven and the cutter housing ( While enabling the rotation of 150, the gear motor 143a performs the APC of the maximum width of the steel sheet S in the open direction.

Therefore, the cutting operation is to begin to cut the width of the preceding steel sheet initially and then naturally cut outward. This is due to the cutting angle formed by the center point of the shaft 150a and the cutting point of the secondary scrap, the driving force driven by the interlocking section, and the joint point formed on the parallel extension line. Will be.

In addition, the taper angle of the trailing steel plate is freely controlled by the drive speed of the interlocking section and the APC speed of the gear motor, and the taper angle plays an important role in determining the amount of taper.

As described above, in the process of cutting the connecting width difference between the leading steel plate and the following steel plate when changing the roll unit, the connection width difference between the minimum width of the leading steel plate and the maximum width of the trailing steel plate is temporarily reduced without any plate overlap or intermediate material input. Since it is possible to cut in the tapered shape, it is possible to prevent the equipment trouble when the width reversal is made from the minimum width to the maximum width.

According to the present invention, in the process of removing the connection width difference between the preceding steel plate and the following steel sheet when changing the roll unit, the connection of the preceding steel plate and the maximum width of the minimum width in a single operation without plate overlap or input of intermediate materials Since the width difference can be cut in a taper shape at one time, productivity improvement and cost reduction can be achieved by preventing the trouble of the equipment when the width reversal is made from the minimum width to the maximum width in advance.

Claims (3)

It is installed at the rear of the welding machine 25 in the continuous steel sheet production process and reduces the connection width difference between the preceding steel plate and the trailing steel plate in the continuous steel plate continuous production process to reduce the connection width difference between the preceding steel plate and the trailing steel plate for the smooth progress of the steel sheet S. In the apparatus, On one side of the base 110 installed in the lower portion of the steel plate (S), upper and lower support rollers 120 and 121 are installed in the width direction of the steel plate, and the transfer block 130 is provided on both sides of the other side of the base 110, respectively, the moving means 140. It is installed to be movable in the width direction of the steel plate, the cutter housing 150 is rotatably installed on one side of the transfer block 130, characterized in that the cutter 160 is installed on both sides of the cutter housing 150 Connection width reduction device of the leading steel plate and the following steel plate. The method of claim 1, wherein the transfer block moving means 140, Two guide bars 141 are installed on the upper surface of the base 110 in parallel with the upper and lower support rollers 120 and 121, and the transfer block 130 is movably fitted to the guide bars 141. The conveying screw 142 is installed between the bars 141 so as to be rotated by the driving unit 143, and the conveying screw 142 is a leading steel plate and the following characterized in that the conveying block 130 is screwed to be transported Device for reducing the width difference of steel plate connection. According to claim 1, wherein both ends of the lower support roller 121 is supported by a frame 121a installed in the base 110, both ends of the upper support roller 120 are supported by a bearing block (120a) Wherein, the bearing block (120a) is the connection width difference reducing device of the preceding steel plate and the trailing steel plate, characterized in that installed by the lifting and lowering cylinder (120b).