RU2348493C1 - Strand slitting line - Google Patents

Abstract

FIELD: mechanics; instrumentation.

SUBSTANCE: line consists of a body, a recoiler, wind-up drums, drive frame mounted rotary shears and a lead-in multiroll bridle having four horizontal and two vertical rollers and a skirting with screw-and-nut transmissions mounted on the body between the shears shafts so that to enable controllable horizontal and vertical relocation. There is a support mounted on the frame so that to enable relocation in the direction of the shears shaft axles with the housing mounted on the support so that to enable vertical relocation. The horizontal rollers are arranged within planes parallel to the shears shaft axles plane attached in pairs to the deflector and the housing so that to enable the centre-to-centre spacing adjustment. The vertical rollers are attached onto the housing surface both sides of the pair of horizontal rollers which comes to be the first one when viewed in the direction of slitting. The vertical roller that comes to be the first one when viewed in the direction of slitting is rigidly attached to the housing with the second vertical roller mounted on a pivoted lever attached to the slide that is joined to the housing so that to enable relocation in the direction of the shears shaft axles. The slide is connected to the pivoted lever via a spring. Between the shear disks there are removers mounted on pins rigidly attached to the skirting so that to enable unobstructed axial relocation. The pins are positioned both sides of the shears shaft axles plane with the pin axes parallel to those of the shafts.

EFFECT: technological capabilities extension; improved performance and width precision refinement with the blanks produced.

4 cl, 20 dwg

Description

The invention relates to equipment for cutting and can be used at enterprises of metallurgical, engineering and construction complexes.

A known unit for the longitudinal dissolution of the rolled sheet (slitting line), comprising a roll unwinder, a straightening machine, centering rollers, pulling rollers, disc scissors and a winding device. (Anisimov V.I. et al. Extension of the range of rolled metal products - a reserve of savings / Anisimov V.I., Antipanov V.G., Shvartsman Z.M. - Chelyabinsk: South. - Ural. Publishing House, 1980. - S.30-31.)

The longitudinal cutting of the rolled sheet (tape) is combined with the trimming of the side edges that enter the edge-cutting shears for grinding.

The disadvantages of the technical solution are the low yield (the mass of the crushed edges is 1 ... 4% of the mass of the roll) and the inability to obtain tape blanks with a width of less than 4 mm (GOST 503-81. Cold-rolled tape from low-carbon steel. Specifications.)

A known line for the longitudinal cutting of a tape containing an unwinder, a winder, feed rolls and circular shears, in which mounted composite disk cutting disks and pullers in the form of rings. The rings are installed between the composite disk disks and supported by two pairs of support rollers mounted above the upper and lower shafts with the possibility of adjustable movement in the direction perpendicular to the plane of the shaft axes. (RF patent No. 2192940, IPC 7 В23D 19/06. Application. 04/23/2001; Publish. 20.11.2002. Bull. No. 32.)

This technical solution provides longitudinal cutting of a tape with a thickness of up to 0.15 ... 0.18 mm for ribbons (tape blanks) with a minimum width of 1.7 ... 1.8 mm. When cutting the initial workpiece with a thickness of more than 1 mm, it is impossible to obtain tape blanks with a width of less than 4 mm due to the low stiffness of the composite cutting disc, which significantly limits the possibilities of the technical solution and does not allow using it to obtain blanks for wire. (RF patent No. 2147259, IPC 7 В21В 1/16, В21С 1/00. Publ. 10.04.2000. Bull. No. 10.) In addition, the execution of pullers complicates the design of scissors and increases the labor costs for their operation.

Closest to the composition of the equipment of the present invention is a slitting line containing an uncoiler, disk scissors and winding drums mounted on the drive frame for winding ribbon blanks and trimmed edge ribbons into rolls (riots). (Kogos A.M. Mechanical equipment of drawing and sheet rolling workshops. 3-ed. - Moscow: Metallurgy, 1980. P.299.)

Winding reels for winding edge ribbons are offset relative to the longitudinal axes of the latter, which leads to high rib and longitudinal curvature and, as a rule, does not allow the use of edge ribbons, for example, as a packing tape or further cutting into blanks to produce wire.

It should be noted that the known slitting technology on known equipment involves the use of tapes with trimmed and uncut edges as the initial blank. Moreover, in both cases, the edge ribbons come either to the edge-cutting scissors, or to the scrap winder, or are wound together with suitable ribbons to the winding drum, and in all cases they are mainly scrapped.

This is explained by the following.

The maximum deviations along the width of the initial rolled sheet with cut edges, for example, according to GOST 14918-80, depending on the accuracy, are + 3 ... 10 mm, and with not cut edges + 20 mm. Hence, the maximum deviations along the width of the edge ribbons will be commensurate with the maximum deviations along the width of the original tape, since the distance between the centering rollers during the longitudinal cutting process is constant. Given this circumstance, it is very problematic to find the use of edging ribbons, bypassing the steelmaking redistribution.

The basis of the invention is the technical task of increasing yield by halving waste, simplifying the design, increasing productivity and durability, expanding the technological capabilities of the line by making blanks for wire drawing less than 4 mm wide, while improving the accuracy of blanks in the width and compactness of riots .

The problem is solved in that the line of longitudinal cutting of the tape containing the unwinder, winding reels and disc shears mounted on the drive frame according to the invention is equipped with an input multi-roller device with four horizontal and two vertical rollers and a chipper, while the horizontal rollers are mounted in planes parallel to the plane axes of shafts of disk shears, in pairs on the bump and the casing, and vertical rollers are mounted on the casing on both sides of the first pair of horizon rollers, the first along the cutting vertical roller rigidly fastened to the housing, the second mounted on a swing arm mounted by means of an axis on the slider, the latter is connected to the housing with the ability to move in the direction of the axes of the shafts of the disk shears and connected to the swing arm using a spring that rotates the lever towards the chipper, the chipper is mounted between the shafts of the disk shears on the bed with the possibility of adjustable vertical and horizontal movements and is equipped with means of movement in the form of screw-nut gears, in addition, the strippers mounted between the cutting disks made in the form of plates are mounted on fingers rigidly connected to the chipper with the possibility of free axial movement, while the fingers are located on both sides of the plane of the axes of the shaft of the disk shears, and the axes the fingers are parallel to the axes of the shafts, the housing is mounted in a support with the possibility of vertical movement, the support is mounted on a scissors drive frame with the ability to move in the direction of the axes of the scissors shafts, and the horizontal rollers are mounted ovany to vary the center distance.

The chipper is equipped with a replaceable carbide plate.

A butt welder is installed between the unwinder and the disk shears.

Kinematically connected winding drums are mounted in height in two levels, in pairs, on both sides of the cutting axis, symmetrically last and equipped with an articulated lever mechanism in the form of two articulated parallelograms and a stacker that is kinematically connected with the winding drums, while on horizontal levers guide rollers are mounted at each of the drums of articulated parallelograms, and one of the horizontal levers of the mechanism is pivotally connected to the stacker.

Equipping the tape slitting line with a chipper and an introduction multi-roller device with four horizontal and two vertical rollers, the horizontal rollers of which are mounted in planes parallel to the plane of the axes of the shaft of the disk shears, in pairs on the chipper and the body, and the vertical rollers are mounted on the body on both sides of the first one along cutting a pair of horizontal rollers, the first along the cutting vertical roller rigidly fastened to the housing, the second mounted on a pivot arm mounted by m axis on the slider, and the connection of the latter with a rotary lever using a spring that rotates the lever towards the chipper, allows you to increase yield by reducing waste by half. This is due to the fact that throughout the entire cutting process, the tape is reliably pressed by the spring loaded roller to the chipper, while due to the distortion of the rollers, the tape contacts the chipper with the chipper near the cutting site, and this, in turn, allows the use of edge waste from longitudinal aggregates cutting a rolled sheet without first editing. Thus, the present invention provides, when cutting the tape, one of the edge blanks (at the chipper), suitable for further use, for example, as an initial blank when drawing the wire.

Placing the chipper between the shafts of the disk shears on the bed with the possibility of adjustable vertical and horizontal movements and equipping it with means of movement in the form of screw-nut gears can reduce the number of technological equipment, increase the accuracy of the edge blank (at the chipper) and expand the technological capabilities of the disk shears.

Reducing the number of tooling is achieved by using one chipper for all sizes of cutting discs.

Improving the accuracy of the edge billet (at the chipper) is achieved by increasing the rigidity of the chipper (two-support fastening of the chipper on the bed) and increasing the accuracy of its installation.

The expansion of technological capabilities of disc scissors is achieved by precise installation of the chipper relative to the nearest cutting disc, which allows you to get an edge blank up to 1 mm wide.

Installing a slider on the housing with the ability to move in the direction of the axes of the shafts of the disk shears allows you to simplify the design of the disk shears by reducing the size of the spring.

The execution of the strippers in the form of plates mounted between the cutting disks on the fingers rigidly connected to the chipper with the possibility of free axial movement, and the installation of the fingers on both sides of the plane of the axes of the shafts of the disk shears parallel to the axes of the shafts eliminates the breakage of the tape blanks with a width of less than 4 mm when they are removed from cutting discs, simplify the design of scissors and reduce labor costs for their adjustment.

Mounting the casing in a support with the possibility of vertical movement, the support on the scissors drive frame with the ability to move in the direction of the axes of the scissors shafts allows you to ensure the specified accuracy of cutting the edge billet (at the chipper) regardless of the curvature of the original workpiece, to simplify the design of the scissors by using one casing (one support) of the chipper for all sizes of the original tape and reduce the time spent on setting up the scissors.

The installation of horizontal rollers with the ability to change the center-to-center distance provides the required accuracy for adjusting the center-to-center distance of the rollers when the thickness and curvature of the initial workpiece change.

The supply of the chipper with a replaceable carbide plate allows to increase the accuracy of the edge billet (at the chipper) and the durability of the chipper.

The installation of a butt welder between the unwinder and disc scissors can significantly reduce the time spent on auxiliary operations when cutting the initial workpiece in the form of waste from aggregates for longitudinal cutting of rolled sheet and, therefore, to increase the productivity of the longitudinal cutting line. This is due to the fact that the average mass of tape billets obtained from waste from slitting units does not exceed 17 kg, and the mass of riots of tape billets, taking into account the assortment of the initial billet, can reach 80 kg. Hence, the implementation of butt welding to cutting provides a reduction of at least four operations for filling the original billet into circular shears, tape billets into winding drums and removing riots from the drums.

The installation of kinematically connected winding drums in height in two levels, in pairs, on both sides of the cutting axis and symmetrically to it, simplifies the design of the slitting line, improves the quality of winding of tape blanks and increases the yield.

Simplification of the design is achieved by the fact that such a design of the winding drums makes it possible to kinematically couple the drums with fairly simple means (chain transmission), while the area occupied by the drums remains unchanged when the second level is installed.

The increase in the yield is due to the fact that when refueling the tape blanks in the drums located symmetrically with respect to the cutting axis, it is not necessary to perform cutting operations of the front ends when refueling them, for example, in the extreme drums.

Improving the quality of winding tape blanks is ensured by a pair of drums symmetrical with respect to the cutting axis, since the installation of more than two drums on each, for example, a friction clutch, as shown by experimental testing of a longitudinal cutting line, leads to a sharp deterioration in the quality of the winding.

The equipment of winding drums with a stacker and a pivot-lever mechanism in the form of two articulated parallelograms, one of the horizontal levers of which is pivotally connected to the stacker, and the stacker is kinematically connected with the drive of winding drums, which improves the quality of winding of tape blanks and the compactness of riots with the simplest design of styling tools .

Thus, the use of the invention allows to increase the yield by reducing waste by half, simplify the design, reduce labor costs for the operation of the line, increase durability and expand the technological capabilities of the line by manufacturing blanks for drawing wire less than 4 mm wide and using as the initial blank waste from slitting aggregates while increasing the accuracy of workpieces in width and compactness of riots.

The invention is illustrated by drawings, where Fig. 1 shows a slitting line, Fig. 2 is a view A in Fig. 1, Fig. 3 is a view B in Fig. 2, in Fig. 4 is a section BB in Fig. .3, Fig. 5 is a section G-G in Fig. 2, in Fig. 6 is a view D in Fig. 1, in Fig. 7 is a section EE in Fig. 1, in Fig. 8 is a view G in Fig.6, Fig.9 is a view And in Fig.8, Fig.10 is a section KK in Fig.6, Fig.11 is a section L-L in Fig.6, Fig.12 is a remote element M in Fig. 7, in Fig. 13 is a view H in Fig. 1, in Fig. 14 is a view O in Fig. 13, in Fig. 15 is a section P-P in Fig. 14, in Fig. 16 - section PP in FIG. 13, FIG. 17 is a section CC in FIG. 16, in FIG. 18 is an extension T in FIG. 13, in Fig. 19 is a view of F in Fig. 18, in Fig. 20 shows the position of the front end of the original workpiece before the task in the cutting discs.

The line for longitudinal cutting of the tape contains (Fig. 1) an unwinder 1 of a roll 2 with an initial tape 3, a butt welding machine 4, an input multi-roller device 6 mounted on a frame 5, disk scissors 7, a shear drive in the form of a gear stand with an open gear console gear and engine (not shown), winding drums 8, stacker 9 and articulated link mechanism 10.

Introductory multi-roller device 6 contains (see figure 2-6) four horizontal 11, 12 and two vertical 13, 14 rollers. The horizontal rollers 11, 12 are mounted in pairs with the possibility of changing the center-to-center distance on the housing 15 and the bump 16, and the vertical rollers 13, 14 are placed on the housing 15 on either side of the horizontal rollers 11. The first vertical roller 14 is rigidly fastened to the housing 15, and the second 13 is mounted on a pivot arm 17, which is mounted on the slider 18 by means of the axis 19. The slider 18 is connected to the pivot arm 17 by a spring 20, which pivots the arm 17 towards the bump 16, and is mated to the housing 15 leniyu axes of shafts 21, circular shears 7. The housing 15 is secured to a support 22 vertically movably, and support 22 - to the frame 5 is movable in the direction of the axes of shafts 21, circular shears 7.

Disc scissors comprise (see FIGS. 6-12) cutting discs 23 mounted on two parallel shafts 21, distance rings 24, kinematic gears 25 with a drive (not shown), bed 26, radial adjustment device of the upper shaft 27, pullers 28 and the previously mentioned horizontal rollers 12 and the chipper 16.

The chipper 16 with fingers 29 is rigidly attached to the brackets 30, which are mounted using the clips 31 on the frame 26. The brackets 30 with the clips 31 and the clips 31 with the frame 26 are interlocked by means of the joints groove-protrusion 32, 33 and are equipped with means of adjustable movement, respectively along the axis 34 and height 35. On the cylindrical sections of the fingers 29 with the possibility of free axial movement, pullers 28 are installed, and on the plane of the chipper 16 from the side of the cutting discs 23, a replaceable carbide plate 36.

The winding drums 8 comprise (see FIGS. 13-19) drums 38 mounted on shafts 37, flanges 39, friction clutches 40, nuts 41, chain 42 and transmission belt 43 kinematically connecting the upper shaft 37 and the stacker 9 with the drive 44, respectively. An articulated link mechanism 10 is fixed to the upper movable frame 45, made in the form of two articulated parallelograms 46, on the horizontal arms 47 of which the guide rollers 48 are fixed, while the lower horizontal arm 47 is articulated to the carriage 51 of the screw stacker through the axis 49 and the eye 50. 9. The stacker 9 is equipped with interchangeable gears 52.

The guide rollers 48 contain pairwise mounted with the possibility of changing the center distance in the housings 53 horizontal 54 and vertical 55 rollers.

Setting up and working on a slitting line is as follows.

Disc scissors 7 are mounted on the frame 5. Gears 25 are engaged with cantilever gears of the gear stand (not shown). A holder 31 and an arm 30 are mounted on the bed 26 by means of the notches-protrusions 32, 33. The fender 16 with the rollers 12 and the replaceable carbide insert 36 are attached to the arm 30 with the fingers 29. Depending on the process to be implemented, the corresponding cutting discs are placed on the shafts 21 23 and the distance rings 24, and on the cylindrical sections of the fingers 29 with the possibility of free axial movement - pullers 28. The radial adjustment device 27 establishes a predetermined overlap of the cutting disks 23, and using means p adjustable movement 34, 35 - the position of the chipper 16 required with respect to the near cutting disk 23 with a replaceable carbide plate 36 and rollers 12.

On the support 22, the housing 15 is mounted with the horizontal 11 and vertical 14 rollers mounted on it with a slider 18. On the slider 18 through the axis 19 and the spring 20 is placed the pivoting lever 17 with a vertical roller 13. Moving the slider 18 in the direction of the axes of the shafts 21, the vertical movement of the housing 15 and the horizontal movement of the support 22 is pre-configured input multi-roller device 6.

On the shafts 37, with the help of nuts 41, drums 38 and flanges 39 are mounted. Using the chain 42 and belt 43 gears, the upper shaft 37 and the stacker 9 are kinematically connected with the drive 44, respectively. Vertical movement of the upper movable frame 45 and horizontal movement in the direction of the cutting axis stacker 9 carry chain tension 42 and belt 43 gears. The lower horizontal lever 47 of the articulated link mechanism 10, made in the form of two articulated parallelograms 46, is connected to the carriage 51 of the stacker 9 using the axis 49 and the eye 50. On the horizontal arms 47 of the articulated link mechanism 10, guide rollers 48 are installed with horizontal 54 and vertical 55 rollers. Depending on the width of the tape blanks on the stacker 9, the corresponding interchangeable gears 52 and the required center distance of the vertical rollers 55 are installed.

A roll 2 with an initial tape 3 is installed on the unwinder 1. The front end of the original tape 3 is wound from the unwinder 1, passed between the rollers 11-14 of the multi-roller input device 6 and brought to the cutting discs 23 of the disk scissors 7. By moving the bearings 22 and the slider 18 in the direction of the axes the shafts 21 achieve touching the front end of the original tape 3 with a carbide plate 36 bonded to the chipper 16 in close proximity to the cutting center (see Fig. 20). The horizontal rollers 11, 12 are brought into contact with the original tape 3. In the filling mode, the front end of the original tape 3 is passed through the cutting discs 23. The drive of the disk shears 7 is stopped and the width of the tape billet in contact with the replaceable carbide plate 36 is measured. If necessary, adjust the axial position of the chipper 16 with a replaceable carbide plate 36 and supports 22. Then, in the filling mode, turn on the drive of the disk shears 7 and pass the front ends of the tape blanks between the roller E 54, 55 and fasten them in drums 38. Included scissors disk drives 7 and the winding drum 8, and is carried out with the original tape reel 2 cutting 3 in operating mode. After the rear end of the original tape 3 has come off the unwinder 1, all drives are turned off. The following roll is installed on the unwinder 1, and the front and rear ends of the tape rolls are butt-welded.

According to the invention, the following studies of equipment for slitting a tape were performed. Waste from slitting aggregates, the so-called edge trim and substandard strip, was used as the initial blank. The thickness of the initial billet was 0.8 ... 2.0 mm. The width of the edge trim was 6 ... 70 mm. In this case, deviations along the width of the edge trim varied over a wide range from 1 mm to 20 mm, and substandard strip - 0.3 ... 1.0 mm. The maximum number of simultaneously obtained tape blanks did not exceed eight. When cutting a wide initial billet, the resulting trim was wound onto a winding device separate from the winding drums and subsequently subjected to further processing on the line. The cutting speed of the initial billet was 0.5 m / s. In total, 30 tons of edging and 12 tons of substandard strip were processed during the testing process. The utilization rate of equipment was 92%, which exceeds the same indicator for known technical solutions by 8 ... 12%. The width of the tape blanks varied from 1.0 mm (in contact with a replaceable carbide plate) to 2 ... 3.5 mm. The deviations of the tape blanks in width, including those in contact with a replaceable carbide plate, did not exceed 0.14 mm. Breaks in the tape blanks in the area of pullers during cutting were not observed. The mass of the riots of the tape blanks was mainly 80 kg. Riots were compact with high quality windings. The yield when cutting a substandard strip reached 100%, and when cutting an edge trim - 80%, the latter is almost two times higher than the yield when using known centering rollers for processing an edge trim. Subsequently, the obtained tape blanks were processed into wire. In the process of wire production, there were no complaints about the quality of the tape blanks.

It should be noted that increasing the utilization rate of equipment is achieved by reducing labor costs for setting up scissors, performing butt welding of the ends of the rolls before cutting the initial workpiece and increasing the durability of the chipper.

Thus, as a result of experimental testing, it can be argued that the use of the invention in comparison with the closest analogue allows to increase the yield by halving the waste, simplify the design, reduce labor costs for the operation of the line, increase durability and expand the technological capabilities of the line by manufacturing blanks for drawing wire with a width of less than 4 mm and use as an initial blank for waste from slitting units while increasing accuracy blank tape width and roll compactness.

It is advisable to use the proposed slitting line at the enterprises of the metallurgical, machine-building and construction complexes for the production of wire and high-precision shaped sections.

Claims (4)

1. A line for longitudinal cutting of a tape containing a bed, an unwinder, winding drums and disk shears with a drive mounted on the drive frame, characterized in that it is equipped with an input multi-roller device with four horizontal and two vertical rollers and a chipper installed on the bed between the disk shafts scissors with the possibility of adjustable vertical and horizontal movements and made with means of movement in the form of screw-nut gears, as well as a support mounted on the drive drive frame x scissors with the ability to move in the direction of the axes of the shafts of the disk shears, and located in the support with the possibility of vertical movement by the body, while the horizontal rollers of the input multi-roller device are mounted in planes parallel to the plane of the axes of the shafts of the disk shears, pairwise on the chipper and the body with the possibility of changing the center distance , vertical rollers of said multi-roller device are mounted on the housing on both sides of the first pair of horizontal rollers in the direction of cutting, first in the course of cutting, the vertical roller is rigidly fastened to the body, and the second is mounted on a pivot arm mounted by means of an axis on a slider, which is connected to the body with the possibility of movement in the direction of the axes of the shears of the disk shears and is connected to the pivot arm by means of a spring, which enables the lever to turn towards stripper, and between the cutting disks of scissors are strippers made in the form of plates and installed with the possibility of free axial movement on the fingers rigidly connected with the striker ax located on both sides of the plane of the axes of the shafts of the disk shears from the condition that the axes of the fingers are parallel to the axes of the shafts. 2. The line according to claim 1, characterized in that a butt welding machine is installed between the unwinder and the disk shears. 3. The line according to claim 1 or 2, characterized in that the winding reels are kinematically connected with each other, mounted in height in two levels in pairs, on both sides of the cutting axis and symmetrically to it, and equipped with a linkage mechanism in the form of two articulated parallelograms and a stacker kinematically connected to the winding drums, while on the horizontal levers of the articulated parallelograms of each winding drum, guide rollers are fixed, and one of the said horizontal levers is pivotally connected to the stacker. 4. The line according to claim 1, characterized in that the chipper is equipped with a replaceable carbide plate.

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