SU761060A1 - Unit for shaping coiled sheet material - Google Patents

Description

The invention relates to the processing of metals by pressure and, in particular, can be used for the manufacture of curved profiles of strip tape.

Known roll forming unit containing consistently installed decoiler rolls of sheet material, designed to install and fix the roll relative to the mill axis, bending the outer ends of the roll and unwinding it, the correct machine designed for straightening the strip after unwinding it from the roll, flying scissors for cutting the strip into dimensional lengths, live rolls with driven rollers for feeding strips of measured length to the forming mill, bending mill for forming sheet billet in the profile of a given con fencing, discharge roller conveyor for transporting finished profiles to the stacker and stacker {1].

However, piece-wise profiling of a sheet blank cut from a roll in a roll forming mill requires different transmitting and centering devices and wires, which results in low dimensional accuracy of the resulting profile.

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Also known unit for profiling roll material containing consistently located uncoiler rolls, tracking device, the correct device, bending mill, cutting device, a device for creating an interval between a continuously formed strip and a section of the profile and stacker [2].

Analysis of the operation of this unit shows that in order to prevent the overlapping of dimensional sections of the finished profile into the stacker, an interval in time between them must be created which is necessary for the operation of the stacker mechanisms and ensured by. unit increased speed of the segments of the finished profile on the conveyor belt compared with the speed of the strip in the forming stands of the mill. This is possible with the help of means equivalent to a belt conveyor, in which a diverting roller table is installed directly behind the mill for transporting finished profiles to the stacker. The speed of the roller table is somewhat greater than the speed of profiling on the standard 761060

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not that provides the necessary interval between moving lanes.

• However, the presence in the unit of a device for creating an interval between a strip continuously emerging from a roll forming mill and a finished section of a profile of a given length, made in the form of a belt conveyor, having a length that is equal to the maximum length of a section of a profile of a given length, and installed in the technological sequence after the press scissors before the stacker of finished profiles, requires additional production space and significant capital expenditures.

In addition, when the finished profile sections are delivered to the stacker, they hit the stacker's support and bounce back, as a result of which blows cause deformation of the ends of the profiles, and the packages are stacked with uneven ends, which requires additional manual sorting.

The tracking device of the unit, installed after the uncoiler of rolls before the sheet-straightening machine, eliminates the influence of the telescopicity of the roll on the lateral displacement of the unwind strip. This is possible due to the fact that the decoiler is in front of the sheet-straightening machine.

However, in the process of straightening the strip in a sheet-straightening machine, the strip is subjected to plastic deformations that change its geometrical parameters, so it shifts to the side of the profiling axis, which violates the accuracy of orientation of the workpiece when entering the first pair of forming rolls of the roll forming mill. One of the main conditions for obtaining a high-quality profile with the required dimensional accuracy is violated, since the inaccuracy of the strip direction relative to the forming rolls of the mill shifts the workpiece away from the main longitudinal axis of the profiling, and when such a strip passes through the rolls with closed gauges, its shoulders are caught and flared or trimmed profile edges.

The aim of the invention is to improve the accuracy of the size and quality of the finished profile, reducing the occupied production areas, reducing the metal of the unit, by ensuring the exact direction of the moldable billet in the roll forming mill and the elimination of damage to the measuring segment of the finished profile when it is fed into the stacker.

This goal is achieved by the fact that the tracking device is installed behind the correct device in front of the roll forming mill, and the device for creating an interval between the molded strip continuously coming out of the roll forming mill and the length of the profile of a given length is located above the stacker and is designed as a roller driving the roller

and a connecting roller with a torque limiting clutch drive.

FIG. 1 shows the proposed unit, side view; in fig. 2 - section A — A of FIG. one; in fig. 3 - tracking device (section B – B of FIG. 2); in fig. 4 - rotary roller conveyor (section B — B of FIG. 2); in fig. 5 is a device for creating an interval between a molded strip continuously emerging from a roll-forming mill and a section of a profile (type D of Fig. 2); in fig. 6 is a view of D FIG. five.

The unit for profiling the rolled sheet material consists of the following installed in the technological sequence: unwinder 1 rolls 2 sheet material, a regular device 3, a tracking device 4 mounted on a roll forming mill 5, a cutting device 6, a device 7 for creating an interval between the formed strip that continuously goes out of the roll forming mill and a segment 8 'of the profile of a given length and the stacker 9.

Uncoiler 1 consists of two side rails 12 mounted on carriages 10 and mounted on a common frame 11. On the latter, there are transporting mechanisms of the presser 13 mounted with supporting elements 14, made in the form of drums mounted on rolling bearings, for a centerless installation of an unwinding roll along the internal opening and the lifting and lowering platform 15. The transporting mechanism of the pressing 13 contains a pressing drum 16 connected through overrunning clutch with a drive rotary motion. The side guides 12 on the carriages 10 allow you to move the decoiler with a roll perpendicular to the profiling axis.

The correct device 3 contains a group of upper right rollers 17 installed in a common body connected hingedly to a frame 18 and a lifting mechanism 19, a group of lower right rollers 20 located on the frame of the device, and a mechanism transporting material made in the form of pressure plates 21 with a drive reciprocating them along the longitudinal axis of the unit.

The tracking device 4 is mounted on the Bed 22 of the roll forming mill 5 in front of the first pair of forming rolls 23 and is made, for example, as a system of a photo sensor 24 and an illuminator 25 fixing with a light beam the deviation of the strip edge from a predetermined position and generating a signal to control the drive of the carriages 10 for moving the decoiler 1 with a roll 2 perpendicular to the axis profiles 761060

and return to the original position of the mechanisms of the correct device 3.

Roll forming mill 5 contains several pairs of forming rolls 23, representing a set of shaping washers, which have a configuration that corresponds to the configuration of a formable sequential profile, and are mounted on shafts of gears 26 of a worm-cylindrical type, interconnected by couplings 27 with a drive through a V-belt transmission from a common electric motor 28. Between the stands 26 are installed non-driven vertical rollers 29 with profiled washers, providing, if necessary, additional molding of the edges of the strips. s.

All of the above mechanisms of the roll forming mill are mounted on the frame 22.

The cutting device 6 is made in the form of an eccentric press with a die 30 with a drive 31 of its reciprocating movement relative to the press plates, along the axis of movement of the formed strip with a speed synchronous speed of profiling.

The stacker 9 consists of two frames 32 installed with the possibility of adjusting the distance between them depending on the width of the finished profile. On the frames 32 are rotary roller conveyors 33 with non-driven, mounted on rolling bearings, cantilever rollers 34. Spring-loaded stop 35 with a drive 36 of reciprocating motion along the profiling axis and the limit switch 37 mounted on a stacker 9. On one of the frames 32 is installed with the possibility of counting length command device 38 to command the cutting device 6 to cut the profile of measured length. Under the roller conveyors 33 is a receiving platform 39 with a drive of horizontal reciprocating movement perpendicular to the axis of the profile.

Above the roller conveyor 33 of the stacker 9, the device 7 is located to create an interval between the molded strip and the section of the profile that is continuously emerging from the bending mill. It is made in the form of a limiting moment connected through the coupling 40 with a rotational drive 41 and a roller 42 interacting with the measuring section 8 of the profile fed to the stacker 9 from the cutting device 6.

The device 7 is installed with the ability to adjust the distance from the cutting device 6 along the axis of movement of the segment 8 of the finished profile, depending on the length of the segment.

The unit for profiling coiled sheet material has an electrical system that ensures the automatic operation of the hydraulic and electromechanical drives of all devices of the unit in a given technological sequence.

The proposed unit operates as follows.

The roll 2 sheet material is installed on the lifting and lowering platform 15 unwinder 1. The platform lifts the roll 2, while the roll hole is opposite the supporting elements 14. The latter are inserted into the roll hole, after which the platform 15 is lowered, and the entire roll is evenly distributed on the supporting elements 14 The presser drum 16 of the transport mechanism 13 presses the roll 2 to be unwound to the support elements 14.

The drum 16 is reported rotational movement and unwinding the strip enters the correct device 3, freely located on the lower right rollers 20 and between the pressure plates 21. The upper right rollers 17 are raised to the extreme upper position, and the pressing plates 21 divorced. A command is issued to lower the upper right rollers 17 and close the pressing plates 21. The drive of the reciprocating movement of the pressing plates 21 along the profiling axis is activated, and the strip is corrected by the correct rollers 17 and 20 and the pressing plates.

The tracking device 4 controls the position of the strip relative to the roll forming before pinching it with the first pair of forming rolls of the mill and with further unwinding of the roll into the strip.

Sequentially passing each pair of rolls of the roll forming mill 5, a flat strip is formed into a profile of a given configuration.

From the roll forming mill, the formed strip enters the cutting device 6, where it passes in the gap between the die and the punch of the stamp 30 and enters the live rolls 33 of the stacker 9.

The molded profile acts on the controller 38, which commands the cutting device 6 to cut a section of the molded profile of a given length. In this case, the die and punch of the stamp 30 are cut and simultaneously moved by means of the drive 31 along the profiling axis at a speed equal to the speed of the profiling.

A cut section of a profile of a given length located on the conveyors 33 of the stacker 9 and interacting with the roller 42 of the device 7 to create an interval between the formed strip and section of the profile installed above one of the rolls of the rolls continuously, coming out of the roll forming section, is said to move linearly faster than the grading speed that provides an interval between continuously ryho761060

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from the profile mill and the specified segment.

When segment 8 reaches the stop profile 35, the limit switch 37 commands the rotation of the roller tables 33 and the finished profile is lowered onto the receiving platform 39 of the stacker under the action of its own weight. cycle segments of the profile of a given length and laying it in a pack on the platform 39 of the stacker 9 is repeated.

The finished dimensional profile sections are stacked on the platform in staggered order, i.e., every second profile is shifted by a constant value relative to the edge of the Pack, equal to the movement of the stop 35 between its extreme positions. With this arrangement, the profiles in the pack simplifies their unpacking.

At the end of the roll profiling, the platform 39 of the stacker 9, together with a pack of the finished profile, moves perpendicularly to the longitudinal axis of the unit and unloads the pack of profiles.

The next roll of material is set in the unwinding body.

In the presence of telescopicity and other defects in the unwinding roll, the tracking device, which controls the deviation of the strip edge from a predetermined position in front of a pair of rolls' of the roll forming mill, sends a command to move the decoiler 1 installed on the carriages 10 with the roll perpendicular to the longitudinal axis of the unit and the correct device to dilute the press plates and correct rollers to eliminate the specified deviation. Then a command is issued to fix the new position of the decoiler with a roll relative to the longitudinal axis of the unit and to activate the mechanisms of the correct device.

The required production areas occupied by the proposed unit for roll material profiling are reduced, since the device for creating an interval between the formed strip and the profile section continuously emerging from the roll-forming mill is located above the stacker in contrast to the known unit, in which a similar device is installed in the processing sequence, i.e. after the cutting device before the stacker.

The execution device to create an interval between continuously exiting

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profile bending mill formed by a strip and a section of the profile in the form of a roller connected through a torque limit coupling with a rotational drive and interacting with the profile, prevents the profile segment from rebounding from the stacker's stop, eliminating damage to the profile end and its surface and ensuring accurate profile orientation when stacked in bundles.

The location of the tracking device after the correct device before the roll forming mill excludes not only the influence of the telescopicity of the roll on the lateral displacement of the strip, but also the influence of dressing on the orientation of the strip in the roll forming mill, as well as increases the dimensional accuracy of the finished profile.

Claims (1)

Claim The unit for profiling a coiled sheet material containing successively arranged and interconnected by interoperable means coil unwinder, a tracking device, a correct device, a roll forming mill, a cutting device, a device for creating an interval between a molded strip and a section of a profile, and a stacker that differs the fact that, in order to increase the dimensional accuracy of the quality of the finished profile, to reduce the occupied production areas to reduce the metal consumption of the unit by ensuring the exact direction of the formable billet to the section bending mill and exceptions, damage to the dimensional section of the finished profile when it is fed to the stacker, the tracking device is installed behind the correct device before the section forming mill, and the device for creating an interval between the continuously formed section bending mill the strip and section of the profile is located above the stacker and is made in the form of a roller, a drive for rotating the roller and a connecting roller with a drive m fty limit torque.