KR100513593B1 - Automatic crop shear knife replacement apparatus - Google Patents

Abstract

It is an object of the present invention to improve the workability of knife replacement by making it possible to automatically change the Kropshire knife exchange, which shears the bar in various rolling processes and improves the mailing ability, regardless of the shape of the knife. It is to provide an automatic cropshire knife maintenance device according to one knife shape.

Automatic Cropshire Knife maintenance device of the present invention is a cropping device in which the knife is attached to the upper and lower knife drums symmetrically by wedges and wedge bolts, respectively, to shear the first rolled bar in the rough rolling process. Located on one side of the shearer 30, the knife drum rotary dog 551 which can rotate the knife drum 31 via the cycloid reducer motor 530, the pulleys 531, 552, and the rotating face plate 550. The knife drum rotating unit 500 is installed; A plurality of wheels 721 and 612 contacting the croppers 30 at front and rear sides of the croppers 30 are mounted and movable along the grooved rails 711 and 611, and the knife ( 32) Knife fixing bolt disassembly unit 700 and knife separation header 642 and knife separation that consist of the configuration of lifters 720, 620 and cylinders 724, 623 that can be adjusted in height according to the position of 32) Knife detachable portion 600 including a plate 641 and the knife separation cylinder 644 is characterized in that the knife replacement operation is made automatically regardless of the type of knife.

Description

Automatic crop shear knife replacement apparatus according to knife shape

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cropper knife changing device, and more particularly, to changing a knife shape of a knife (straightness or curved surface) by changing a crop of a knife (Crop Shear), which shears a bar in various rolling processes to improve a mailing property. Automatic Cropshire Knife maintenance device according to the knife shape to improve the efficiency of the work by allowing mechanical exchange without depending on manual operation regardless of the degree of rotation).

In general, hot-rolled slabs produced in the continuous casting process of steel mills are rolled by rolling rolls and finally produced as coiled products.

1 is a process system schematic diagram for explaining the concept of a rolling process. As referred to herein, the heating furnace 11 is heated again and rolled in the shape of the bar 17 while undergoing the processes of rough rolling 1 (13) and rough rolling 2 (15) to finish rolling mill (21). It is rolled again in the form of a strip through) and then produced in the form of a roll by the winder (25).

Among these rolling processes, the cropshire 30 located between the rough rolling 2 (15) and the finishing mill 21 has a top part (bar end part) and a tail part (bar end part) in order to improve the flowability of the bar 17. The shear of the knives (32) of the Cropshire (30) is abrasion occurs when the proper recovery is used, it is necessary to replace.

In particular, in recent years, in order to improve the flowability of the bar 17 is better, the front end and the rear end of the bar is sheared to have a curved surface of a certain shape, the knife of the Cropshire 30 used for such shearing Take form.

FIG. 2 is for explaining the shape of the upper knife 32. The upper knife 32 has a rounded convex shape as it goes toward the center of the knife, which is the height of the lower jaw of the knife when the distance L1 from the center of the knife is secured. H1, and the lower knife 32-2 has a convex shape that is convex upward as it goes toward the center part, so when the distance of L2 from the center of the knife to the left and right is secured, it becomes H1, the height of the lower jaw of the knife to be sheared. It is shown.

In addition, as for the knife used at the rear end of the bar, the knives are arranged opposite to the tip of the bar and are mounted on the croppers drums 31 and 31-2.

In general, the Cropshire knife 32 is replaced by a crane at a predetermined place, and after inserting a tweezer jig (not shown) into the drum neck, many workers move the knife 32 position of the upper knife drum 31 to one side. After the horizontal alignment, the small crane or chain block is used to manually take out and assemble the knife, or to use a knife changer.

In particular, according to the prior art (patent application 2001-68228) relating to the knife changing device is installed on the one side of the moved Cropshire is installed a knife drum rotary shaft which can rotate the knife drum by a predetermined position via the rack gear and pinion And a clamp configured via a sliding base and a rotary cylinder on top of another body mounted on a plurality of wheels to be movable along the rails so as to contact the front of the cropper knife according to the operation of the rotary cylinder. It is possible to disassemble and assemble by holding a certain surface.

However, in the knife replacement operation as described above, there is a problem that the knife has a straightness shape and is applicable only when the length of the inclined surface is long.

In other words, in the case of a circular road with a curved surface having a certain shape and excellent stability of the knife, the cropped knife exchanging device according to the prior art does not have a short slope when gripping a knife using a clamp. Even if the inclined surface is secured to some extent, as the curved surface of a certain shape exists, the contact area with the clamp is small so that it cannot be held in a stable state.

This requires a parallel process of manual work, depending on the type of knife, there is always a risk of damage to the knife and safety accidents, bringing a problem that the work efficiency of knife replacement is reduced.

The present invention is to solve the above problems of the prior art, an object of the present invention is to automatically change the knives of the Cropshire to shear the bar in various rolling processes to improve the mailing ability, regardless of the shape of the knife without manual operation The present invention provides an automatic croppers knife maintenance device according to a knife shape that can be exchanged with a knife to improve workability of knife replacement.

Cropshire knife maintenance apparatus of the present invention for achieving the above object is a cropper device that is attached to the upper and lower knife drum symmetrically by wedge and wedge bolt, respectively, to shear the first rolled bar in the rough rolling process In, the knife drum rotating unit is installed on the one side of the knife drum rotary knife can rotate the knife drum via the cycloid reducer motor and the pulley and the rotating face plate; Knife fixing bolt disassembly unit consisting of a lifter and a cylinder that can be moved along a rail having grooves and mounted with a plurality of wheels contacting the crops at the front and rear of the crops, and the height can be adjusted according to the position of the knife. And a knife detachment unit including a knife separation header and a knife separation plate and a knife separation cylinder.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

5 is a plan view of a cropper knife exchange apparatus according to the present invention. Here, the Cropshire Knife Changer is located on one side of the skid on which the Cropshire will be seated. Part 700 and the wedge is shown to be composed of a detachable portion 600 for detaching the knife in a separated state.

As shown in FIGS. 5, 6, 8, and 9, the knife drum rotating unit 500 includes rails 510 mounted on the left and right sides of the base 501, respectively, and the rails 510 are respectively provided. A wheel 522 is inserted into each driven shaft 521 in front of it so as to be able to move along the top surface.

The moving cart 520 in which the bearing 525 and the driving wheel 524 are sequentially inserted into another driving shaft 527 having the shaft gear 526 inserted thereon is seated on the upper surface of the rail 510.

Next, the mobile cart motor 540 in which the pair of gears 541 of the drive shaft 527 is inserted is seated at a predetermined position on the rear of the upper part of the mobile cart 520 and fixed with bolts. The box 542 is again covered with the upper portion of the gear 541 to protect the moving cart 520 along the upper surface of the rail 510 according to the operation of the moving cart motor 540.

The motor support 532 is seated by bolts at a predetermined position on the upper surface of the moving cart 520, and the cycloid reducer motor 530 in which the pulley 531 is inserted is seated on the motor support 532 again using bolts. Next, another support 553 is seated and welded to the moving cart 520 while maintaining a constant distance from the pulley 531.

A dolly face plate 550 having a dog 551 and a pulley 552 is inserted into the support table 553 by the shaft 556 as a member, and the shaft is fixed by the bearing block 555 and the bearing 554 and the The rotational kinetic energy is transmitted between the pulley 531 and another pulley 552 by the belt 533.

In addition, the disassembly assembly portion 700 of the fixing bolt for fixing the wedge is provided with a base 710 to be located in front of the knife seating skid 740, as shown in Figs. The upper left and right sides of the base 710 are welded and fixed to the rails 711 having grooves, respectively.

Seat the sub-lift moving cart 720 provided with the wheel box 722 on the rail 711, respectively, and then turn the wheel and the wheel box 722 on the wheel 721 to the rail 711, respectively. The pin 732 is connected to the end portion of the rod 731 of the cylinder 730 seated on the base 710 and the link 726 attached to the lower part of the sublift cart 720 by a pin 732. The sublift moving cart 720 is configured to move forward and backward according to the forward and backward movements of the cylinder 730.

The folding fixed block 723 consisting of a plurality of blocks 723a, 723b, and 723c is seated on the upper portion of the sublift moving cart 720, and a sublift up-down cylinder (center) is provided at the center of the sublift moving cart 720. Bolt 724).

The sub lift 750 is mounted on the up down cylinder 724 so that the sub lift 750 is up and down in accordance with the operation of the up down cylinder 724.

The jib crane 701 having the impact trench 760 and the balance wire 761 is seated and fixed to the upper portion of the sub lift 750 by bolts.

As shown in FIGS. 5, 6, 7, 8, and 10, the knife detachment unit 600 is positioned at the rear of the knife seating skid 740 to seat the base 610, and the base ( The upper left and right sides of the 610 are welded and fixed to the rails 611 having grooves, respectively.

The sub lift lift cart 620 having the wheel box 621 respectively provided on the rail 611 is seated, and then the wheel box 621 is rotated in turn with each groove 612 formed on the rail 611. The rod 626 of the cylinder 627 seated on the base 610 and the link 624 attached to the lower part of the sublift cart 620 by the pin 625 are connected to each other. According to the forward and backward movements of 627, the sublift moving cart 620 is configured to be forward and backward.

The foldable fixed block 622 composed of a plurality of blocks 622a, 622b and 622c is seated on the upper portion of the sublift moving cart 620, and a sublift up-down cylinder (center) is formed at the center of the upper portion of the sublift fixed block 622. Bolt 623).

The sub lift 630 is mounted on the up down cylinder 623 so that the sub lift 630 is up and down according to the operation of the up down cylinder 623.

Meanwhile, the upper part of the sub lift 630 is fixed to the front and rear shaft holders 665 and 660 with bolts on the left and right sides, respectively, on the center between the shaft holders 665 and 660 fixed to the left and right sides. The center holder 663 is again fixed to the upper part of the sublift 630, and then each knife-spaced header moving table 670, 671 is positioned between the shaft holders 665, 660 and the center holder 663, respectively.

 After positioning the header moving member between the center holder and the shaft holder, the screw shaft 690 and the guide rod shafts 680 and 681 provided with the right and left screws, respectively, are replaced with the shaft holders 665 and 660 and the center holder 663. And then, through the knife separation header moving table (670,671) in order to insert and fix.

One end of the screw shaft 690 is connected to the header left and right moving motors 631 so that the knife separation header moving parts 670 and 671 move left and right according to the operation of the header left and right moving motors 631. Make it move.

In addition, the knife separation plate 641 in front of the knife separation plate 641 and the knife separation cylinder 644 in the rear, and the knife separation header 642 in the upper portion of the knife separation plate 641, the knife separation header moving table 670 and 671 are bolted together, and a jib crane 601 is provided on an upper surface of the sub lift 630.

Referring to the operation of the present invention configured as described above are as follows.

In the hot rolling process, the rolled material in the form of the bar 17 in the rough rolling mill 15 does not have the same shape as the top part and the tail part (Top or Tail) due to the characteristics of the material. In order to improve, it is necessary to shear at the cropper 30 in a certain form.

However, the knife 32, which is one of the main components of the cropper 30, needs to be replaced at an appropriate time after completion of a certain number of operations due to wear occurring due to its characteristics.

In order to replace such a knife, as shown in FIG. 7, when the cropped knife 32 is mounted on the knife seating skid 740 using a crane, the lower surface of the cropped knife 32 is formed on the surface of the skid 740. It is settled in the U groove to maintain balance.

At this time, the disassembly and assembly portion 700 of the fixing bolt for fixing the wedge of the knife replacement device and the detachable portion 600 for detaching the knife is completely backed away from the Cropshire knife 32, the Each sub lift 750 or 630 of the disassembly assembly part 700 and the detachable part 600 which detaches the knife from each other is down.

In addition, as shown in FIG. 12, the knife drum rotating part 500 also waits in a completely backward state, and the headers 640 and 650 of the detachable part 600 for detaching the knife are left and right.

This state is the initialization mode of the device of the present invention.

As described above, in the initialization mode of the device of the present invention, when the knife 32, which is one of the main components of the cropper 30, is replaced, or an irregular replacement occurs, and the knife 32 needs to be replaced. , By using a crane to be mounted on the knife seating skid 740 of the Cropshire knife replacement device of the present invention.

Therefore, when the upper knife 32 used for the front end of the bar is replaced, the present invention device, which is in the initialization mode, moves the balance of the knife drum rotating part 500 located on one side of the cropped knife 32 as shown in FIG. Operating the motor 540 causes the rotational kinetic energy of the motor 540 to be transmitted to the gear 541.

As a result, the shaft gear 526 paired with the gear 541 rotates so that the driving wheel 524 rotates. Accordingly, the moving cart 520 seated on the rail 510 is cropped by the knife drum neck portion. The dog 551 attached to the rotating face plate 550 is inserted into the cropper knife drum neck portion 31-2 while advancing to 31-2.

In this way, when the dog 551 is inserted into the Cropshire knife drum neck portion 31-2, the cycloid reduction gear motor 530 is started, and the rotational force is transmitted to the pulley 531 to the rotating surface plate 550. Another pulley 552 is formed to receive a rotational force by the belt 533 to rotate in the direction ⓐ, thereby rotating the dog 551 inserted into the neck portion 31-2 to rotate the knife drum ( 31) is rotated.

When each knife 32 attached to the knife drum 31 is kept horizontal by the above-described action, as shown in FIG. 13, the wedges are installed on the left and right sides of the cropped knife 32, respectively. The cylinders 730 and 627 attached to the disassembly assembly part 700 of the fixing bolt to be fixed and the detachable part 600 to detach the knife are operated to operate the end portions of the rods 731 and 626 of the respective cylinders 730 and 627. Each of the connected carts 750 and 630 is brought closer to the cropper knife 32.

As a result, when the disassembly assembly part 700 of the fixing bolt fixing each wedge and the detachment part 600 for detaching the knife are close to each other, the respective sub lifts 750 and 630 are connected to the upper knife 32. A synergistic action is performed to obtain a proper position, and the up-down cylinders 724 and 623 provided above the respective moving trolleys 710 and 610 are operated.

As a result, each of the sub lifts 750 and 630 coupled to the up and down cylinders 724 and 623 is raised in the ⓤ direction to reach the position of the upper knife 32.

When the respective sub lifts 750 and 630 reach a proper position with respect to the upper knife 32 by the above-described action, the sub lifts 750 and 630 are configured in the jib crane 701 of the disassembly assembly part 700 of the fixing bolt for fixing the wedge. After removing the fixing bolt by using the impact trench 760, the socket attached to the impact trench 760 is removed again.

Next, the wedge 33 is separated from the knife drum 31 by replacing the bolt with the hemmer socket and then hitting the bolt.

At this time, when the bolts and wedges 33 holding the knife 32 are separated from the knife drum 31, the headers 640 and 650 of the detachable part 600 for detaching the knife as shown in FIG. As described above, in order to secure the height H1 of the lower jaw of the knife 32 as described above in the prior art, the header moving motor 631 is used so that the distance L1 is left and right from the center of the knife 32. When rotated in the ⓐ direction, the rotational kinetic energy is transmitted to the screw shaft 690 inserted into the knife separation header carrier (670,671) to rotate.

Accordingly, the knife spacer headers 670 and 671 are moved toward the center along the guide rods 680 and 681, and the respective headers 640 and 650 located above the knife spacers 670 and 671 are also respectively ⓒ and. Moving in the direction ⓓ, the distance L1 between the headers 640 and 650 is secured.

After the adjustment of the distance between the headers (640,650) according to the type of knife 32 by the above operation is completed, as shown in Fig. 14a, the knife separation cylinder 644 is completely in the backward direction in the direction ⓘ and the knife is separated. In the header initialization mode in which the plate 641 also rises in the ⓤ direction and reaches a predetermined position on the lower surface of the knife 32, as shown in FIG. 14B, when the knife separation cylinder 644 is in the ⓙ direction, the cylinder rod 645 ends. The attached knife spacing header 642 is brought into close contact with the knife 32.

Subsequently, as shown in FIG. 14C, when the header 640 is raised again in the ⓤ direction, the knife 32 is also raised in the ⓤ direction such that a gap is generated in the drum 31 that is in close contact with the lower surface of the knife 32. do.

At this time, when a gap is generated between the lower surface of the knife 32 and the drum 31 in close contact with the knife 32, the knife shed cylinder 644, which has been advanced at the same time as the header 640 is advanced in the direction ⓚ, as shown in FIG. 14D. At the same speed to the reverse direction ⓘ, the knife separating plate 641 attached to the header 640 is moved forward along the lower surface of the knife 32 to hold the knife 32.

When the knife 32 is separated from the drum 31 in this way, as shown in FIG. 13, the cylinder 627, which has been advanced in the ⓖ direction, is reversed by a predetermined distance in the direction opposite to the ⓖ direction, whereby the sublift 630 Also, when the knife 32 separated from the knife drum 31 is removed by using the jib crane 601 configured on the upper part of the sub lift 630, the knife 32 separation operation is completed. do.

Here, the assembly operation of the knife 32 is performed in the reverse order of the separation operation sequence described above.

In addition, when the knife 32-2 assembled in the drum is a lower knife, only the distance between the headers 640 and 650 may be adjusted to L2, as shown in FIG. 12, and the following operations are the same as those of the operation procedure described above. Perform.

In addition, when the type of knife is a conventional straightness, it is possible to separate the knife by the same action as the upper knife 32 of the tip portion, as shown in Figure 12 for the knife 42, 42-2 in the rear as shown in FIG. By rotating the knife drum 31 using the same knife drum rotating unit 500, the knife 42, 42-2 is positioned as the knife detachable detaching unit 600.

At this time, since the arrangement of the knife is opposite to the tip, only the distances of the headers 640 and 650 need to be adjusted to L1 and L2, respectively, and the remaining actions are the same. Therefore, the knife removal operation is completed by the same operation procedure as the knife 32 described above. do.

15 is a flow chart showing the operation flow relationship of the present invention Cropshire knife replacement device at first glance.

As described above, the present invention enables the exchange of a cropped knife, which is a heavy item, to be replaced by a mechanized device regardless of the type of knife, thereby improving the efficiency of the cropping knife changing operation. It has a unique effect to prevent the risk of worker safety accidents caused by manual replacement work.

1 is a block diagram of a general hot rolling process system.

2 is a cross-sectional view of a cropper knife and a partially enlarged perspective view of the knife.

3 is a block diagram of a conventional Cropshire knife exchange device.

Figure 4 is a diagram illustrating a conventional knife detachment process.

5 is a plan view of a cropper knife exchange apparatus according to the present invention.

FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 5. FIG.

FIG. 7 is a cross-sectional view taken along line C-C in FIG. 5. FIG.

Figure 8 is a perspective view of the assembly state Cropshire knife exchange apparatus according to the present invention.

9 is a perspective view of a knife drum rotating part according to the present invention.

10 is an exploded perspective view of a knife detachment unit according to the present invention.

11 is an exploded perspective view of a knife fixing bolt portion according to the present invention.

12 is an explanatory view of an operation state of a knife rotating drum portion detachable portion according to the present invention.

Figure 13 is an explanatory view of the working state of the fixing bolt portion according to the present invention.

14A-14D are explanatory views of a knife replacement process according to the present invention.

15 is a flowchart illustrating the operation of the present invention.

※ Explanation of symbols about main part of drawing ※

11: heating furnace 15: crude rolling mill

17: Bar 21: rolling mill

25: winder 30: Cropshire

32: Cropshire Knife

500: drum rotating part 501: base

520: moving cart 526: shaft gear

527: axis 530: reducer motor

540: moving cart motor 541: gear

600: knife detachable part 601: jib crane

622: sub lifter fixing block 623: sub lifter cylinder

627: forward and backward of the sub lifter cylinder 630: sub lifter

640: header 644: knife separation cylinder

680 guide rod 690 screw shaft

700: fixing bolt disassembly assembly 724: sub lifter cylinder

760: torque wrench

Claims (1)

Rough rolling process in which knives 32, 32-2, 42 and 42-2 are attached to upper and lower knife drums 31 and 31-2 symmetrically by wedges and wedge bolts. In the cropper (30) for shearing the first rolled bar in the position, the cycloid reducer motor 530 and the pulleys (531, 552) and the twirl face plate (550) A knife drum rotating unit 500 provided with a knife drum rotating dog 551 capable of rotating the knife drum 31 through a medium; A plurality of wheels 721 and 612 are mounted on the front and rear surfaces of the croppers 30 to contact the croppers 30 and move along the grooves 711 and 611 and the knife ( 32, the knife fixing bolt disassembly unit 700 is composed of a lifter 720, 620 and cylinders 724, 623 so that the height can be adjusted according to the position of the 32; The automatic crop cropper knife maintenance apparatus according to the knife shape, characterized in that it comprises a knife detachment header (600) consisting of a knife spacing header (642), a knife separator plate (641) and a knife spacing cylinder (644).