JP2002529245A - Drive system for slowing or dragging metal strip - Google Patents

Abstract

(57) Abstract: Forming and filling plates (31,2,3) to extend the effective range of a drive system in a device equipped with an endless circulating chain system for pulling, i.e. slowing down, a metal strip (4) or sheet. 32), an elastic coating (12) is provided which can be adapted. Further, the input, output, and drive state can be adapted to a specific task.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a drive system for a device for pulling or braking a metal band or sheet, preferably in a band line between endless rotating chain systems.

[0001] EP-A-0088347 and EP-A-0195096 describe the surface of a split or non-split band without the damaging effect of the tensile or braking force required when braking a metal band. A metal or sheet band brake stand is disclosed which is added to the above.

[0002] DE-B 1 288 865 discloses the use of eddy currents to brake conductive metal bands. This embodiment is used in practice. The fundamental disadvantage is that the desired effect does not appear in a beneficial manner until the speed of the band reaches about 50 m / min. The band tension can be adjusted only by changing the spacing. If the distance is too small, it will contact the magnet and cause relative movement,
No satisfactory results were obtained.

[0003] Another eddy current brake is described in the published specification DE 195 24 289 A1. The basic difference is that the permanent magnet moves along a circular path. Only one magnetic path is available for the holding action. Furthermore, the permanent magnets are only parallel for a very short time, so that the holding action occurs in a non-uniform and generally reduced manner. In order to provide a certain sufficient band tension, the rotational speed of the braking roller must be such that it is no longer adjustable. In addition, the efficiency becomes very poor when trying to obtain a high drive output.

Description of the invention The problems encountered with the present invention are, on the one hand, the expansion of the use of known brake stands and, on the other hand, various tasks, namely the entrance of the carriage-like roller block in the band drive area. , Exit and drive conditions to achieve different specific effects.

[0005] This problem is solved according to the features of the main claim by molding which forms a sturdy support in the central region. Inlets and outlets must be elastic. It is designed so that high elasticity can be obtained in the horizontal direction (the direction of the band tension). In addition, the present invention achieves very little compaction, which results in a critical reduction in bending work at the inlet and outlet. The width of the lining corresponds to the pitch of the chain. The device is provided between the rotating rollers. With this design, it is possible to provide a closed contact surface in the drive area. This design requires that the top carriage chain advance synchronously with respect to the bottom carriage chain.

It is desirable to select a lining that is relatively thick and low in hardness. Since the metal band is buried, the shape error of the metal band in the cross section and the undulation of the band are corrected without any problem. The formation of the interstitial space allows the compressed elastic lining mass to flow in a specific manner.

The lining is provided with a filling piece, for example a flat steel. As a result, compression processing can be performed in a specific method adapted to functional work by the stress concentration coefficient,
In practice, the desired inclination in the direction of tension can be imparted to the lining without restriction.

A suitable application [sic] lies in the fact that only one rotating carriage chain is designed as a rotating table. In this case, a force is induced in the band by a permanent magnet or via an electromagnet so that a braking force or tension can be applied. The magnetized metal band is attracted to the protective strap of the carriage chain by the attractive force, and a driving force is generated according to the μ value.

Another possibility is that two rotating rollers are provided with permanent magnets or electromagnets, and the magnetic poles formed form a parallel and linear moving magnetic field which is a linear rotating eddy current of the conductive band material. Suitably acting as a brake.

When energy is supplied by conduction or induction through a rotating system, the metal band is heated. This effect can also be used in Galvani and other processes.

If the rotating system is equipped with an electronic measuring head, the metal band and the inspection head work in a fixed position at the same speed for a predetermined time, so that, for example, the thickness of the band, surface conditions, metal structure, etc. are very accurate. Can be inspected.

An optimal mode of operation can be achieved if the mechanical linear drive is operated by an electric linear drive. This embodiment applies a load to the carriage chain system only in the linear drive region, and is particularly suitable for high forces and high speeds.

If the brake stand is provided at a predetermined position on the control frame at the height of the passing line, this means that the tilt moment is “out of design”, so that the band can be very accurately positioned with respect to the center of the band or the edge of the band. It becomes possible to control. as a result,
Fluctuations in tension due to vibration are avoided. This is an important aspect of the rolling, forging, bending, and strain relief processes.

[0014] The brake stand or control frame may be an extension of the band tension measurement frame. In this case, these units are suspended on leaf springs. The reaction force of the band tension is recorded without distortion through the measuring cell. This measuring system can measure only the horizontal force with high repeatability and is set to several Newtons depending on the measuring range.

In the case of high demands, for example in the case of very sensitive bands, such as copper or aluminum bands, the invention makes it possible, according to the invention, to use relatively straight guide strips which can simultaneously absorb the clamping forces. A special effect is possible by clearly feeding the chain with the roller blocks in the clamping and driving area. A relatively large pressure is thus absorbed, which is necessary to ensure a high tension or holding force without relative movement between the band and the rotating carriage-like roller block. A specific feed to the roller block is realized by the guide strip in the drive area being straight and the inlet and outlet being curved. High elastic movement is possible with certain moldings. Due to the insertion of the forming plate, the compression of the elastic lining is particularly reduced.

The design of the electric linear drive is such that the hinge ends of the plates connecting the chain carriages are loaded by bending and centrifugal forces, whereas the load from the applied band tension acts only on the drive area. It has the advantage of. Therefore, the size of the hinge is limited to deflection and centrifugal force. This minimizes wear.

The drive part may be configured such that current is transmitted to the metal band by conduction or induction. This solution is preferably used in a galvanic process in heating the band to measure the process on the band and to create the magnetic field used to induce the coercive force. A conductive material is provided on the carriage-like roller block for transmitting current. As the roller block passes through the drive zone, the current is clearly switched. Apart from being more efficient than conventional gas or oil-fired annealing furnace installations, a great advantage of this measure is that the energy supply can be switched at any time. When using the eddy current method, the tension of the band can be adjusted by the facing speed of the chain carriage, and the holding force can be adjusted by changing the frequency.

When the tracing stylus is provided on the lining support of the carriage chain system, the rotating table can provide ideal analysis conditions. The task of the rotating carriage chain system is to transport the band and to ensure a constant band distance from the measuring head or magnet coil. Since the metal band and carriage chain system have the same speed in this area, the dwell time of the inspection operation can be set by providing a contact. Suitable applications are measuring band thickness, measuring stress in bands, scanning surfaces, and other inspection systems. The current is alternately sent laterally from the inside and from the outside. The current is switched on and off after the chain carriage reaches or leaves the parallel portion.

Each magnet or magnetic coil passing through the entire segmented area can be supplied with voltage by the same system. The band is drawn to the chain carriage via the attraction of the magnet. Band tension is applied via the chain carriage system as a function of these forces and the μ value. This is also possible with permanent magnets. This design is suitable for magnetized metal bands.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated apparatus is such that each band strip is flexed without winding sheaves 1,2.
It has the great advantage that it can be sent tangentially. The reverse tension generated in the brake stands 5, 6 is sent to the winding point without causing bending loss and relative movement. In this way, ideal preconditions have been made for a uniform and specific distribution of band tension. The tangential feed is adjusted continuously. Numeral 1 is a winding mandrel of a winding reel, 2 is a wound coil, 3 is a third separator of a band strip, 4 is a metal band, 5 is a top rotating roller, 6 is a bottom rotating roller, 7 is a second separator, Reference numeral 8 denotes a first separator for sending a metal band at right angles from the loop 9 to the brake stand, and reference numeral 10 denotes a split shear.

A feature of this solution according to FIG. 2 is that the electric linear drive 19 drives the mechanical linear drive. With this solution, a high band tension is induced very quickly in the metal band. During flexing, only the forces from the centrifugal force and the hinge movement occur in the carriage chain. The carriage chain 11 may have a simple structure. The entire drive chain is composed of a shaft including a chain gear, a universal shaft, a gear device, a clutch, and an electric motor. Generally high speeds and at the same time high band tensions can be handled without problems. Numeral 12 is elastic segmented lining, 13 is lining support,
Reference numeral 14 denotes a moving rail.

The brake stand 20 is suspended by a leaf spring 24 in a control frame 21. The weighing cell 23 allows the band tension to be measured with very low hysteresis and very high repeatability without distortion due to deflection. The braking / tension stand 20 is composed of upright rotating rollers 5 and 6 which are arranged opposite to each other and are mounted on a guide 18 of the column 20, of which the upper rotating roller 5 has a bottom portion by a cylindrical compression piston rod 18. It is in contact with the rotating roller 6.

The chains 11 and 11a are connected to each other and extend over the entire width of the band 4 in the direction of the arrow 25, and at least support wheels 26 and the lateral guide rollers 2 on both sides.
7 together with a number of carriage-like roller blocks that roll on the track or make lateral contact with the track. The track is sent to the drive area, where opposing roller blocks 11 hold both sides of band 4 and clamp the band therebetween.

The lining support 13 has an elastic lining 12. The width of the lining corresponds to the pitch T of the chain and extends into the axle of the support wheel 26 of two adjacent, ie consecutive, blocks. The axle simultaneously forms the center of rotation. The lining 12 is defined by the interstitial space 30 in such a way that a special elastic adaptation of the compression lining is possible on the inlet and outlet sides. The compression working height of the lining should be as low as possible in order to make the bending operation as light as possible. At the same time, the lining should be given a very high elasticity in the direction of the band tension, such that the band speed of each split band strip is different due to the different inclination of the lining as shown in FIG. Such a functional modification was made according to the invention to adapt the compression working height to the work via the stress concentration factors by the support plates 31, 32, but the inclination of the lining was limited to only a slight extent. Is done. FIG. 4 shows the lining position when the band tension is small, and FIG. 5 shows the lining position when the band tension is high.

The permanent magnet 33 or the magnetic coil 34 that generates the eddy electric field is
When mounted on a conductive band, a band tension can be induced using a conductive band, particularly a band of aluminum, copper, or an alloy thereof. In this case, the carriage chain generally moves in a direction opposite to the moving direction of the band. The length of the contact portion may be adapted to the requirements.

This embodiment according to FIG. 6 is very beneficial for metal bands with the highest surface requirements, since no contact with the braking system is seen. Permanent magnet 33 or coil 34
The distance between them is kept constant by the rotation roller being supported by the elastic block 35. Due to the attractive force, the metal band 4 floats between the permanent magnets 33 or the coils 34. A protective strap 36 is also shown. If a spindle drive is used instead of the cylinder 18, the distance can be set, so that the machine will be provided with additional control elements.

When the permanent magnet 33 or the magnetic coil 34 that generates a magnetic field is mounted on the lining support 13, band tension can be induced using the magnetized metal band. in this case,
The carriage chain moves in the traveling direction of the band. The length of the contact portion may be adapted to the requirements.

This embodiment is very beneficial for metal bands with the highest surface requirements, since they only contact the braking system on one side.

[Brief description of the drawings]

FIG. 1 is a view showing a split band brake stand.

FIG. 2 is a partially cutaway front view of a brake stand including a control / measurement frame.

FIG. 3 is a partially broken side view of a brake stand provided with a control / measurement frame.

FIG. 4 is a diagram showing an elastic lining that can be considered when the load state is different.

FIG. 5 is a diagram showing an elastic lining that can be considered when the load state is different.

FIG. 6 is a diagram illustrating tension in a forward direction and a reverse direction due to an eddy electric field.

FIG. 7 is a diagram showing forward and backward tensions caused by a magnetic field.

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number 299 09 850.8 (32) Priority date April 19, 1999 (April 19, 1999) (33) Priority claim country Germany (DE) ( 81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), BR, CA, JP , KR, MX, US

Claims (15)

[Claims] Preferably, the band is divided by a band line between endless rotating chain systems (26, 27) which clamp or drive a metal band or sheet (4) with a carriage-like roller block (11). Device for pulling or braking the band or sheet, in particular a plurality of narrow bands, by means of a braking action, wherein the molded and filled pieces have a certain adaptation.
A device characterized by an elastic lining capable of). 2. The device according to claim 1, wherein the lining of the contact area is closed. 3. The device according to claim 1, wherein a magnetic coil is mounted on the roller block (11). 4. The device according to claim 1, wherein a permanent magnet (33) is mounted on the roller block (11). 5. The device according to claim 1, wherein the at least one moving band has a flatness measurement. 6. The device according to claim 1, wherein the at least one elasticity lining comprises a flatness measuring element. 7. Apparatus according to claim 1, characterized by a flatness measuring element on the rotating roller block (11). 8. The device according to claim 1, wherein the brake stand is driven by an electric linear motor. 9. Apparatus according to claim 1, wherein the brake stand is pivoted so that the band is fed tangentially to the coil. 10. A floating brake stand of the measuring frame, characterized in that the reaction force is absorbed in the horizontal direction and is determined by the weighing cell.
An apparatus according to one of the claims. 11. Apparatus according to claim 1, characterized by a control frame for the height of the passing line of the brake stand such that the tilting moment is eliminated. 12. The device as claimed in claim 1, wherein the device is characterized by a linear band tension due to an eddy current system. 13. The apparatus according to claim 12, characterized by a linear band tension generated by a movement opposite to the band traveling direction. 14. The method according to claim 1, wherein the linear band tension is generated by a magnetic force.
Device according to one of the preceding claims. 15. Apparatus according to claim 1, wherein a folding stand and a band grinding device are arranged between the rotating stands.