SU1532122A1 - Universal coldroll-forming unit - Google Patents

Abstract

The invention relates to the processing of sheet material in rolls and is intended for use in ferrous metallurgy. The purpose of the invention is the expansion of technological capabilities. The universal roll forming unit contains a unwinder for the workpiece, a regular and welding machine, a loop store, a device for preliminary transverse cutting of the workpiece, a number of forming stands, a device for drawing and dividing the finished profiles into measured lengths. The unit has disc shears and press shears located on both sides of the longitudinal axis of the unit. Disk shears are installed with the possibility of reciprocating movement along the axis of the unit and rotation of the disks around the axis, perpendicular to the axis of rotation of the disks and lying in the axial plane of the disks. The latter are mounted for movement along their axes of rotation. The forming stands are made with non-driven rollers, alternately arranged on both sides of the longitudinal axis of the unit with the possibility of movement along this axis and turning around an axis lying in their axial plane and perpendicular to the axis of rotation. In front of each press scissors, disc scissors and in front of the first forming cage, compensating feed rollers are installed, mounted to move in the axial plane across the longitudinal axis of the aggregate. Each pair of compensating rollers is mounted on a plunger of a hydraulic cylinder, the working cavity of which is connected to the cavity of an additional hydraulic cylinder. On the plunger of the last fixed load, balancing the weight of these rollers. 1 hp f-ly, 7 ill.

Description

This invention relates to the machining of sheet material using special shaped rolls and is intended for use in the iron and steel industry, transport engineering and construction.

The purpose of the invention is the expansion of technological capabilities.

Figure 1 shows a diagram of the lateral projection of the roll forming unit; figure 2 is a diagram of the horizontal projection of the roll forming unit, fig.Z is a diagram of the compensating feed rollers; Fig 4 is a diagram of disc shears; on - diagram of the forming stand; fig about - scheme stands for

stretching the profile and dividing into measured lengths; 7 is a diagram of a two-roll block t of a lower stand.

Profile bending machine contains decoiler 1, pre-machine 2, welding machine 3, loop storage device A, device 5 for preliminary transverse cutting of the workpiece, compensating feed rollers 6, flying press shears 7, compensating feed rollers 8, flying press shears 9, compensating feed rollers 10, scissors 11, compensating feed rollers 12, disc shears 13, compensating feed rollers lA, disc shears

15, compensation feed rollers

16, disc shears 17, compensation rollers 18, forming stands 19-24, three-roll stand 25 for drawing a profile through forming stands

and divide it into measured lengths with drives 26 and 27. Each pair of compensating feed rollers 28, 29 with an individual drive of one of them is mounted on the plunger 30 of the hydraulic cylinder 31 connected by pipeline 32 with an additional hydraulic cylinder 33, on the plunger 34 of which a weight 35 is fixed.

The disk shears consist of a housing 36 in which the power cylinders 37, 38 with pistons 39, 40 rigidly connected with shafts 41, 42 are placed, on which the disk knives 43, 44 and the splined couplings 45, 46 are seated, in which the splined ends of the drive shafts 47, 48 enter, each hinges 49, 50 and receiving rotation from the actuator 51. Power cylinders T-1s have slide valves 52-59 connected by pipes 60 and 61 to the pump 62 and to the control unit 63o. electric actuator 64 is fixed with gear B5, which engages with the toothed rim of the faceplate 66, with the supporting axis 67, freely rotatable in plitovine 68 hundred boiling on rollers 69, 70, placed in the guides 71, 72 and having a drive shaft 73 through 74.

The non-driven forming stand contains a frame 75 mounted on the base 76, in the cavity of which a pad 77 of the shaft 78 is placed. The upper roll 79 is connected to a pressing device 80, having an actuator 81, located on the crossbar 82, and a pad 8

Q 5

0

five

0

0

the shaft 84 of the lower roll 85, resting on the supporting device 86, the working cylinder 87, the piston rod 88 of the piston 89 which is rigidly connected to the base 76, having solenoid valves 90, 91, connected by nozzles 92 to the compressor 93 with the commander 94, plitin 95, on which the base 76 can move in the axial plane of the rolls, and the working cylinder 87 is rigidly fixed, and on which the actuator 96 is located with the automatic control unit 97, gear 98, which engages with the gear wheel 99 connected to the platform 100, into the axial cavity which axis 101 enters Ivarny to the clito type 95. Platform 100 with wheels 102, 103 placed in guides 104, 105 has a drive 106 connected to the wheels by shafts 107.

The three-alley stand for stretching the strip through the forming stands and dividing the profile into dimensional lengths has beds 108, 109 in which the pillow 110 of the shaft 111, the pillow 112 of the shaft 113 and the pillows of the shaft 115 are placed. Elastic radial bearings are placed between the bearings 116 of the shaft 115 and its pillows Compensators The rotating sleeves I85 119 of the stand are rigidly connected to each other by cross-pieces 120, form a block for the two upper shafts 121, 122, on which gears 123-125 of the rotational drive rolls 126, 127 are mounted, which sit on said shafts, which form working gauges with the lower roll 28 neither The old shaft, the cushions of which rest on the plungers 129 of the working cylinders 130, the working cavities of which are connected by pipes 131 to the pump 132, which is powered by signals from the sensor 133 of the thickness of the workpiece installed in the head part of the roll forming unit. In the rotary holders, pillows 134 with bearings 135 of shaft 121 are connected, connected to pressure devices 136, mounted in clamps 137 of clamps, and spring-loaded with elastic pads 138, as well as gears 139 of shaft 122 with bearings 140, connected to pressure devices 141, located in the covers 142, and are fitted with elastic elements 143.

On the path of movement in the axial plane of the compensation rollers, sensors 144 and 145 are installed, if necessary automatically regulating

five

skorospz dvizhep. zagotokki n rotovogo profile or stop their movement "

The profile bending machine operates as follows

From rewinder 1, workpiece 146 is fed to the correct machine 2, then passes through the butt-welding machine 3, where the rear end of the previous and the front end of the subsequent rolls are joined to create a continuous process, the workpiece fills the loop drive, and in the device 5 it is partially cut in cross section over the thickness of certain intervals. After that, the workpiece enters the first pair of supplying compensation rollers 6, which, like the subsequent pairs of such rollers (8, 10, 12, 14, 16, 18), consist of one drive 28 and one non-drive 29 rolls, which produce billets from the previous one (it’s equipment units to it and its submission to subsequent ones along the course of profiling, as well as compensate for the possible temporary discrepancy between the speeds of the billet in the above equipment units, which can be disassembled during the manufacture of complex profiles section (figured cuts of the side edges with disc shears and appropriate molding of these places in the cages). When pa (unit 3, such a mismatch of speeds and settings of pulleys adjacent to this napoii feed rollers is compensated as follows. When speeds are asynchronous, there are no speed / velocity and subsequent installations of this pair of rollers, the KaJHi6i5a connector is at the level of the workpiece motion, the plunger 30, -a of which the rollers are mounted, lifted, the load 35 with the plunger 34 an additional guide gave birth to n ;; i) a 33 is lowered to the lower position 15 meme nt the occurrence of change of speed on the installation, following the rollers, the excess of the moving workpiece through the roller 29 presses on 1 ton; e15 30 by force

R

R

where R is the radius of a room-55 circle

a commercial;

dU - 1) azok speed v of movement of the workpiece on ripcaiiiPCT22

installation of the rollers and. the speeds V - the movement of the workpiece on the installation behind the ro-l1 "s, defined as

do

V - V

1 V

(2)

Q j 0 5 Q. 5 Q

five

m

(3)

R

(four)

m is the mass of the excess of the workpiece accumulated by the compensation rollers for the time t, corresponding to the mismatch of the speeds V and V, determined by the dependence

In S AVt-0

-

where B is the width of the workpiece; S is the thickness of the workpiece; 9 - the proportion of the material of the workpiece; g - free fall acceleration.

Substituting the value of mass1 1 from (3) into (1), we obtain the magnitude of the force of pressing the excess workpiece on the roller of the compensation pair in the form

In S D V40

Under the action of this force, the plunger 30, lowering together with the rollers, squeezes the working fluid from the hydraulic cylinder 31 through the pipeline 32; an additional hydraulic cylinder 33, which will lift the plunger 34 with a load of 35, giving them a supply of potential energy. Since the beginning of the alignment of the speeds of the workpiece in the previous and subsequent installations, the force of the workpiece backbone forming a loop in the rollers 28, 29 will decrease, the load 35 with the plunger 34 will lower, the plunger 30 with the rollers will increase the potential energy of the load 35 with the plunger 34. The stock loop of the workpiece reduced to zero with full equality of the speeds of the workpiece before and after the feed rollers

In the manufacture of certain types of profiles of variable cross section of high complexity, when there is a possibility of significant differential speeds in installations before and after the compensation of the rollers, as well as to prevent accidents by command of the sensors 144, 145 of the rollers when moving in the axial plane can slow down or accelerate the feed of the workpiece from the rammer and the movement of the profile in pulling

cages or stop their gears.

When bent profiles of a variable length along the cross section are made at the required places on the moving workpiece, they are cut along a broken right or left side edge, respectively, using press shears 7 or 9, the shape and position are determined by the shape of the shears of the press shears and moving them in the transverse direction figured cuts on the workpiece. Cutting the right and left side edges on the moving workpiece according to different curve shapes when making profiles on a unit that are variable along the length of the section, make disks. scissors 11, 13, 15 17 located on both sides of the longitudinal axis of the unit (alternately right and left),

Providing a shaped cut along the curved lines of the required forms of the side edges. A moving blank is provided with pairs of discs (knives) A3, 44 rotated by shafts 41.42, driven together with pistons 39, 40 rigidly mounted on them through coupling sleeves 45, 47 and 46, 48, as well as cardan joints 49, 50 from the gear stands 51. The transverse movement of the disks 43, 44 to tune to a new place of cut or perform a given shape of the cut curve of the side edges of the workpiece in motion and return them to their original position is carried out by feeding the working liquids in pr The left or left cavities of the power cylinders 37, 38 and its removal from the opposite first cavities of these cylinders, separated by pistons, through the system of automatic forward and backward valves 52-59 through pipes 60, 61 by pump 62, controlled by block 63. In this case, the shafts 41, 42, slippery in spline couplings, axially moving the disks 43, 44c. The rotation of the plane of rotation of the disks to perform a shape cut and return the disks to their original positions is performed by turning on the electric actuator 64 rigidly fixed on the housing 36 and on the shaft of which the gear 65 is mounted, which via a crown gear engaging with face plate 66 rotates the latter in a predetermined direction together with the mounted on it shears housing bearing dis0

0

five

0

five

0

five

0

five

ki and their drives, on an axis 67, firmly seated on a plate 68 "The reciprocating movement of the disc shears along the unit for performing figured trimming of the side edges and returning them to the initial position is produced by moving the plate 68 on two pairs of rollers 69.70 by guides 71, 72 driven through shafts 74 from a drive 73 "

When making profiles variable across the length of the cross section, the blank cut along the side edges is formed by gradual bending in each stand separately of its right and left parts of the cross section by passing through the stands 19-24 with non-driven cantilevered rollers of this, from the pulling force applied to the finished profile 147, the forming rolls 85, 79 rotate with the shafts 78, 84 in the pillows 77, 83 fixed in the guide frame 75. The desired movement of the rolls in the axial plane is carried out by a screw pair of devices 86 pillows of the lower roll and pressure 1st device 80 with a drive 81 pillows of the upper roll mounted in the crossbar 82 of the bed. To form profiles that vary along the length of the cross section, the rollers move along the axes of their rotation by moving the base 76 on the slab 95 with the frame attached to it from the pushing force of the piston rod 88 of the piston 89, from the feed to the working cylinder 87 through the electro valves 90 and 91 and nozzles 92 of pressurized fluid from compressor 93, switched on by the 94o control unit. The rolls are rotated around an axis lying in their axial plane and perpendicular to their axis of rotation, produced by rolling gear 98 96, controllable block 97 around gear wheel 99, with the rollers, bed frame and working cylinder rotated with the slab relative to the gear wheel and platform 100 rigidly connected with it on axis 101 o. Moving the stands along the longitudinal axis of the aggregate is due to movement of platform 100 on four wheels 102, 103, along guides 104, 105, driven by a drive 106, cut shafts 107 "

91

The profile is drawn through the forming stands 19-24 by means of a device for drawing and dividing the finished profiles and measuring lengths in the form of a three-roll stand with a drive of 26 rolls and a drive 27 of turning roll blocks. The pull force is applied to the profile 147 behind the last forming stand by a pair of three-roll stand rolls, the lower 128 of which, constantly in contact with the profile, receive rotation through the shaft 115 from the gear stand, and the upper 127 roll of this pair with the shaft 122 and the gear 124 which is sitting on it, as well as the 120 swiveling cords 118 119 roller 126 with the shaft 121 and gear 123, which are rigidly connected with the cross-arms, receive rotation through the intermediate gear 125 and the shaft III placed in the pillow 110 beds 108, also from the gear stand.

The constant elastic compression of the profile in thickness in the caliber of the rolls 127, 128 to provide a guaranteed amount of pulling force is created by the corresponding position of the pillows 139 by pressing devices 141 mounted on the caps 142. And the compression of the elastic elements 143 by the pillows 139 creates an additional force pressing the roller 127 to the roll 128, sufficient to compensate for small oscillations of the workpiece along the mass. In addition, the presence of elastic elements 143 compensates for the dynamic loads on the bearings 140 of the shaft 122 when the roller 127 is mated with the roller 128 to form a gauge on the fly, with the roller 126 in this position in this position

At the moment of exit of the transverse notch in thickness on the profile of the rolls of the last forming stand, an actuator 27 is turned on, which, through the shaft 113c with a supporting cushion 112 fixed in the guide frame 109, makes one revolution of the swiveling sleeves 118, 119, at which the rollers 126, 127 are wrapped around an axis lying between them in their axial plane. In this case, at the moment of the half turn, the rolls 126, 127 change each other’s positions and the roll 126, in motion, forming an instantaneous caliber with a shaft 128, creates a jerk impulse of force applied to the profile directed to the dynamic longitudinal

22

ten

0

with n

5 0 with Q

5 Q

stretching it, under the action of which the finished profile will be split at the incision site. After a full turn, the rolls 126 and 127 will take up their original position.

The elastic compression of the profile in thickness in the caliber created by the rollers 126, liZ8, sufficient to develop the desired magnitude of the dynamic force along the length of the profile, is ensured by appropriate installation of the pillows 134 by pressing devices 136 located in the caps 137 "Compensating for variations in the thickness of the workpiece within acceptable limits by compressing a certain force of the elastic elements 138 by the pillows 134, In addition, the elastic elements 138 reduce the impact loads on the bearings 135 of the roll shaft 121 12.6.

The protection of the bearings 116 of the shaft 115 of the roll 128 and the three-roll stand assemblies from dynamic loads when changing positions of the rolls 126, 127 is provided by annular elastic elements 117,

When the workpiece thickness exceeds the permissible limits, the stability of the ratio of the thickness of the profile and the gaps in the rolls 127, 128 and 126, 128 is provided by a thickness sensor 133, at the command of which the double action pump 132, which is connected to the correction cylinders 130 via pipelines 131, supports the plungers 129 which lower or raise the cushion 114, changes the position of the roll 128 in the axial plane.

In the production of curved profiles of the usual type, for example, varietal for forming them, one of the groups of forming stands can be used, located to the right or left of the longitudinal axis of the unit. In the production of varietal profiles of complex shape, requiring a large number of stands, both groups of stands (right and left) can be used, for which the longitudinal axes of the molding are combined or maximally close by moving the rolls of both groups.

When forming conventional sheet corrugated profiles of the usual type, all the adjacent adjacent stands of the right and left groups are formed by longitudinal movement or all of these groups are aligned along the axial planes of the rolls and in their

beds instead of the cantilever four rolls set a pair of double-rolls of the usual type.

In the production of bending profiles of a cross section that does not vary along the length, volatile shearing machines can be used to perform various types of perforations by installing an appropriate interchangeable tool that allows perforated profiles to be made on the unit with any pitch between the groups of holes or cuts along the length.

In the production of corrugated profiles, some unplaced stands of the right or left groups can be used to perform curvilinear along the length of the corrugations, for which transverse movement of their rolls and rotation of their axial planes are used simultaneously with the molding.

The production of profiles with periodically repeating longitudinal, transverse and with various combinations and relative positions of longitudinal and transverse corrugations, including longitudinal corrugations that are curvilinear in length, is carried out by installing rolls with the corresponding elements in the cells of the aggregate. Moreover, due to the fact that the stands of the unit, non-driven rolls can have any ratio and size of diameters to provide the required step between the corrugations along the length of the profile, and the presence of a backward and forward movement of the stands of the right and left groups along the aggregate allows various alternation and distances between the groups of periodically repeated corrugations performed by each pair of rolls, this creates ample opportunities for making the most diverse assortment of profiles of this type

On a bending machine, a multi-sided profiling process of varietal profiles and narrow profiles with corrugations can be carried out. In this case, the coil blanks are dispersed by disc scissors 11, 13, 15, 17 along the length of two or more blanks, which are then guided and molded in the right and left groups of stands in one or several rows in each of the groups.

As shown by the results of laboratory studies and calculations described

„

5 o

5 o Q 5

Q

five

on the design of the universal profy-libing unit in comparison with the known device provides. expansion of technological capabilities in the production of a wide and diverse assortment of curved profiles with variable cross-sectional length, conventional type profiles, perforated profiles, profiles with curvilinear lengthwise corrugations, profiles with periodically repeated longitudinal and transverse corrugations, various combinations of longitudinal and transverse corrugations, including those with curvilinear longitudinal longitudinal corrugations along the length. Multiple profiling can also be performed on the unit.

In addition, the use of a universal roll forming unit of the proposed design will increase productivity by cutting on the go finished profiles of any shape at a speed of profiling (150-180 rpm) which is not technologically supported on existing profile bending units.

The profile-bending unit can be implemented when designing new or reconstructing existing mills and installations for the production of a wide range of curved profiles of various types and purposes, and is of considerable interest to the national economy, as it allows expanding technological capabilities and increasing productivity.

Claims (2)

1.Universal profilebing unit containing a unwinder of the workpiece, a regular and welding machine, a loop drive, a device for preliminary transverse cutting of the workpiece, a number of forming stands, a device for drawing and dividing the finished profiles into measured lengths, made in the form of a three-roll stand with a circumferential axial th plane, while the lower roll is made driven, and the other two are installed in rotary drive holders with the possibility of rotation around the axis lying between them in their axial plane having first drive spring and p the cage apart with different forces, with the exception of the fact that, in order to expand technological capabilities by producing profiles of variable cross section along the length with curvilinear lines along the corrugations, and with various combinations of longitudinal and transverse corrugations, it is equipped with circular scissors and volatile press bridges, installed on both sides from the longitudinal axis of the unit, compensatory feed rollers mounted to move in the axial plane across the longitudinal axis of the unit, and radial elastic comp dynamic load carriers placed on the bearing journals of the lower roll of the device for drawing and dividing the finished profiles, with the press shears being transversely displaced about this axis, the disk shears with the possibility of reciprocating axial movement, the unit and rotating the disks around axes perpendicular to the axis of rotation of the disks and lying in their axial plane, mentioned These discs are placed with the possibility of moving along their axes of rotation, and the forming cells are arranged in a checkerboard order on both sides of the longitudinal axis of the unit with the possibility of moving along the longitudinal axis of the unit and made with non-driven rollers mounted console to move along their axes of rotation. , and rotation around an axis lying in their axial plane and perpendicular to the axis of rotation. 2. Popl assembly, distinguished by the fact that it is equipped with compensating rollers position sensors associated with the scrubber drive and three-roll stands, hydraulic cylinders with plungers according to the number of pairs of compensating rollers and additional hydraulic cylinders with plungers and loads on the latter, and the pipeline through which the working cavity of each hydrocyliidre is connected to the cavity of the corresponding additional hydrocyliidra, each pair of compensating rollers mounted on the plunger of the corresponding gi rotsiliidra. 2. J. 5. 5 1 6 3-10 П 18 19 Q // Zl; j /. eleven 12 13 111 15 IS 25 .1 2 3 f. 5 B. L i " / 4f 17 li "ak f / j  f2 / 4/1 / .  J gs rn: jwjbg 89 no hCh I ll ± 100 P t 101/107 t FIG. five  89  I ll ± 100 ws W D., r / "G, j t S S H) l, 10} nf S / o. Sh Ifl