Brushing machine for brushing metal strips

Abstract

Brushing machine (1) for brushing metal strips with at least one roller brush unit (3) arranged in a machine body (2) with rotary drive (4), comprising at least one roller brush (31) and optionally at least one counter-pressure roller (32), characterized in that - that at least one roller brush (31) and counter-pressure roller (32), which are arranged in guide slides in the machine body (2) and supported on both sides, are fixed on both sides in the brushing machine (1) by means of hollow shaft cone clamping elements as quick-change couplings (33) and connected to the respective rotary drive (4), - that a drawbolt (34) for closing or releasing the hollow shaft cone clamping element (33) on the roller drive side can be actuated hydraulically, electronically or pneumatically, and - that a pull bolt (34) for closing or releasing the hollow shaft cone clamping element (33) on the side opposite the rotary drive (4) can be manually operated.

Description

[0001] The invention relates to a brushing machine for brushing metal strips according to the preamble of claim 1.

[0002] Cleaning machines with brushes have been used for metal strips in the metal industry for many years. These machines typically have one brush for the top of the strip and one for the underside. Usually, another roller is positioned on the opposite side of the strip from the brush; this roller either supports or presses the strip against the brush during processing. This counter-pressure roller can be positioned centrally to the brush or offset to the side.

[0003] The requirements for brushing machines used for surface treatment of metal strips or plates are as diverse as the requirements of the respective type of surface treatment. Setting and adjusting the brushing machine to the required surface treatment can usually be achieved by selecting a suitable brush, strip or plate feed rate, brush shaft speed, and brush pressure.

[0004] A brushing machine for surface treatment is described in DE 27 12 921 C2. With such a device, it is also possible to superimpose an oscillating movement acting in the axial direction of the tool shaft onto the rotary motion of the brush. A tool spindle driving the brush roller is guided and held radially by means of hydrostatic sliding bearings. The tool spindle is supported on one side in a bearing housing carried by the rocker arms. The brush shaft is attached to a flange located at the end face of the tool spindle by means of screws. The special feature of the design is that the machine housing is no longer surrounded on both sides by bearing supports and the like, but rather the throughput and machining zone projects freely from the main part of the machine housing.The throughput and processing zone is freely accessible from one side, allowing the machine to be operated, maintained, and the mechanical cleaning process of the plates to be monitored from there. The rotary drive of the brush shaft is powered by a V-belt pulley and a geared motor, which generates a brush roller rotation speed of 10–15 meters per second.

[0005] German patent application DE 37 37 636 A1 discloses a further development of a brushing machine for plate-shaped workpieces, in which a cylindrical brush is attached to a rotating tool shaft. A tool shaft, designed as a spindle, is mounted in a bearing housing located in the machine frame. At its free end, which projects from the bearing housing and the machine frame R, it carries a brush that is axially attached to the tool shaft by a mounting flange and bolts. The tool shaft is supported in two spaced-apart hydrostatic sliding bearings with a corresponding lubricant supply.

[0006] German patent application DE 20 20 835 A describes detachable couplings for replacing a processing roller in brushing machines.

[0007] German patent DE 450 773 A describes a coupling for tool spindles of grinding or polishing wheels, designed to connect two axial shaft sections. The coupling consists of a locking pawl that is held in a detent position by a tension spring. Tool changes or replacements can be performed without stopping the drive shaft. Such coupling units are designed for quick tool changes during operation on grinding or polishing wheels.

[0008] Publication GB 2 208 276 A concerns a method and a device for changing grinding wheels on a grinding machine. In cases where the machine must be stopped, the associated braking and re-acceleration of the grinding spindle is disadvantageous when grinding wheel changes are frequently necessary. It is proposed to perform the grinding wheel change while the grinding spindle is running, with the grinding wheel being transferred from the grinding spindle to a rotating support spindle of a tool holder. In addition to clamping and releasing devices, synchronizing devices for adjusting the speeds of the grinding and support spindles are also provided for changing the wheel during operation.

[0009] Document US 4,683,679 A relates to a grinding device for the continuous dressing of a grinding wheel, including a holding device for a grinding wheel or dressing roll. It describes a device with a mechanism for automatically changing the grinding wheel or dressing roll.

[0010] German patent application DE 10 2008 057 482 A1 discloses a brushing machine with at least one roller brush for the continuous surface treatment of metal strips. Each roller brush treats the strip, which is guided over a counter-pressure roller, in the area where the strip wraps around the counter-pressure roller. The brushing machine has a machine frame that is at least partially designed as a hollow metallic body, which may be constructed as a welded sheet metal structure.

[0011] German patent application DE 10 2008 057 484 A1 discloses a brushing machine with roller brushes for the surface treatment of metal strips, particularly those made of copper alloys, in a continuous process. Each roller brush treats the strip, which is guided over a counter-pressure roller, in the area where the strip wraps around the counter-pressure roller. The brushing machine has an adjustment mechanism for each roller brush vertically to the strip path, using at least two columns guided in bushings. The bushings for guiding the columns are arranged in areas of the machine frame between its side walls located on both sides of the strip path.

[0012] Furthermore, a clamping device is known from German patent application DE 10 2005 049 377 A1. The clamping device acts on a tool that has a hollow shank cone. The clamping device has a drawbar mounted axially adjustably in a base body for actuating a clamping head that interacts with clamping jaws. The axial position of the drawbar in the clamping position is secured by self-locking without the use of a clamping spring.

[0013] The invention is based on the objective of further developing and optimizing a brushing machine to meet the requirements of the respective machining task.

[0014] The invention is described by the features of claim 1. The further referenced claims relate to advantageous embodiments and further developments of the invention.

[0015] The invention relates to a brushing machine for brushing metal strips, comprising at least one roller brush unit with a rotary drive arranged in a machine body. The brushing machine includes at least one roller brush and optionally at least one counter-pressure roller, which are arranged in guide carriages within the machine body and supported on both sides. The at least one roller brush and / or counter-pressure roller are fixed on both sides of the brushing machine by means of quick-change couplings and connected to the respective rotary drive. The quick-change couplings are designed as hollow-shaft cone clamping elements. The brushing machine further comprises a hydraulically, electronically, or pneumatically actuated pull bolt for locking or unlocking a hollow-shaft cone clamping element, at least on the roller drive side, and a manually actuated pull bolt for locking or unlocking a hollow-shaft cone clamping element on the side opposite the rotary drive.

[0016] The invention is based on the premise that the roller brush units arranged in the machine body are integrated with the roller drive. The roller brush units consist, for example, of roller brushes acting on the metal strip surface, which are supported on the opposite side of the strip by counter-pressure rollers rotating in opposite directions. The roller brush and counter-pressure roller are arranged in guide carriages within the machine body for easier installation and removal and are supported on both sides. The force flow resulting from the roller brushes and counter-pressure rollers is thus directly transmitted into and absorbed by the machine body. The machine tool spindle is mounted directly within the machine body. The corresponding force is applied to the strip surface by measuring, control, and adjusting devices for the roller brush and counter-pressure roller relative to each other.For example, a brushing machine incorporates two roller brush units as modules. One module uses a roller brush to treat the underside of the strip, while the other treats the top side. In the direction of strip travel, additional modules for surface treatment can also be arranged within the machine body as independent processing stations for different finishes. The two roller brush / counter-pressure roller combinations within a module, or the respective processing stations, can also be separated by a central divider within the machine body. A special sealing element seals the openings of the inlet and outlet slots in the machine body for the metal strip passing through during operation.

[0017] The particular advantage lies in the fact that the solution according to the invention enables a particularly simple and quick change of the roller brushes or counter-pressure rollers in brushing machines using the hollow shaft cone clamping elements, abbreviated HSK couplings or HSK clamping elements. Furthermore, double-sided bearing of the roller brushes and counter-pressure rollers in conjunction with HSK couplings results in a stable construction with high precision when processing strip or sheet metal surfaces.

[0018] In a preferred embodiment, the bearing points of the roller brushes or counter-pressure rollers can remain in the machine body during removal. After removal of the roller brushes or counter-pressure rollers for cleaning or replacement, there are no bearing points to consider that could be mechanically damaged during transport, modification, or cleaning. Because the bearing points are not part of the transportable machine components, they remain protected within the machine body.

[0019] The drawbolt for locking or unlocking a hollow-shaft cone clamping element, at least on the roller drive side, can be actuated hydraulically, electronically, or pneumatically. Such remotely actuated couplings facilitate the handling of machine elements in hard-to-reach areas of the brushing machine. Particularly on the drive side, rotary drives can make the coupling mechanism difficult or even impossible to access.

[0020] The pull bolt for locking or unlocking a hollow shaft cone clamping element on the side opposite the rotary drive is manually operated. This side of the machine is easily accessible for personnel to install or remove the roller brushes or counter-pressure rollers. These machine components are extended from the machine housing on guide rails, and the HSK clamping element, for example, is only manually operated by the operator once a roller brush or counter-pressure roller is secured on a repair or transport trolley.

[0021] In a preferred embodiment, the bearing arrangement of the machine tool spindle can be a fixed bearing on the drive side and a floating bearing on the opposite side. The fixed bearing is thus located on the drive side. The bearing positions opposite the drive side can advantageously compensate for the different thermally induced changes in length of the individual machine components relative to the machine body.

[0022] Advantageously, the machine tool spindle can have a direct drive. This eliminates the need for additional drive shafts.

[0023] Exemplary embodiments of the invention are explained in more detail with reference to the schematic drawings.

[0024] It shows: Fig. 1 a schematic front view of a brushing machine, and Fig. 2 a schematic view of a hollow shaft cone clamping element.

[0025] Fig. Figure 1 shows a schematic front view of a brushing machine 1 with a cutaway view of the front of the machine body 2. During operation, the metal belt (not shown) runs between the roller brush 31 and the counter-pressure roller 32 through the roller brush unit 3. Two quick-change couplings, designed as hollow-shaft conical clamping elements 33, are provided for mounting the roller brush 31 and the counter-pressure roller 32. A drive motor 41 for the roller brush 31 and a drive motor 42 for the counter-pressure roller 32 serve as rotary drives 4. The drive motors 41 and 42 are directly and axially aligned with the machine tool spindle. Fixed bearings 51 are arranged on the drive side and floating bearings 52 on the opposite side. The fixed bearings 51 are located on the side of the drive motors 41 and 42. The bearings opposite the drive side can compensate for changes in length of the individual machine parts relative to the machine body 2.

[0026] Fig. Figure 2 shows a schematic view of a hollow-shank taper clamping element 33 in the locked position. Such HSK clamping elements 33 possess high precision and rigidity, enabling the application of extremely high clamping forces for secure holding. The roller brush 31 is connected to the machine tool spindle 5 via the hollow-shank taper clamping element 33. For this purpose, the collet 35 is positioned in the locked position using the drawbolt 34, thus forming a secure connection suitable even for high rotational speeds. Due to the flat contact with the collar, excellent positioning accuracy is achieved, minimizing concentricity deviations. Reference symbol list 1 brush machine 2 machine bodies 3 roller brush unit 31 Roller brush 32 Counter-pressure roller 33 Quick-change coupling, hollow shaft cone clamping element 34 pull bolts 35 Collet 4 Rotary drive 41 Drive motor for roller brush 42 Drive motor for counter-pressure roller 5 machine tool spindle 51 fixed camps 52 Lotlager

Claims

[1] Brushing machine (1) for brushing metal strips with at least one roller brush unit (3) arranged in a machine body (2) with rotary drive (4), comprising at least one roller brush (31) and optionally at least one counter-pressure roller (32), characterized by , - that at least one roller brush (31) and counter-pressure roller (32), which are arranged in guide slides in the machine body (2) and supported on both sides, are fixed on both sides in the brushing machine (1) by means of hollow shaft cone clamping elements as quick-change couplings (33) and connected to the respective rotary drive (4), - that a drawbolt (34) for closing or releasing the hollow shaft cone clamping element (33) on the roller drive side can be actuated hydraulically, electronically or pneumatically, and - that a pull bolt (34) for closing or releasing the hollow shaft cone clamping element (33) on the side opposite the rotary drive (4) can be manually operated. [2] Brushing machine according to claim 1, characterized by , that the bearing points of the roller brushes (31) or counter-pressure rollers (32) remain in the machine body (2) when they are removed.

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