EP3974079A1 - Tubular roller, roll feeder and method of manufacturing a tubular roller - Google Patents

Abstract

The present invention relates to a tube roll, a roll feed and a method of manufacturing a tube roll, wherein the tube roll 300; 350 a first end 305a; 355a and a second end 305b; 355b and a radially circumferential rolling surface 302; 352 included. The rolling surface is disposed between the first and second ends and is adapted to contact a workpiece 10 . The rolling surface 302; 352 has an outer diameter d_a. In the area of the rolling surface, the tubular roller has a hollow inner area 304; 354, which has an inner diameter di, the rolling surface 302; 352 and the hollow interior 304; 354 are arranged substantially concentrically. The tube roller also includes a first bearing surface 309a; 359a, adapted to cooperate with a bearing to hold the tube roller 300; 350 about a rotation axis 301; 351 rotatably, the first bearing surface 309a; 359a has a diameter d_la that satisfies the following condition: d_i ≤ d_la ≤ d_a.

Description

field of invention

The present invention relates to a tube roll, in particular for a roll feed, a roll feed comprising at least one tube roll and a method for producing a tube roll.

background

Roller feeds are used, for example, for conveying and feeding, in particular for the clocked feeding of workpieces such as band or strip material. For example, roller feeds are used in punching applications. In this case, the workpiece is fed in a clocked manner, with the clocking of the feed being synchronized with a punching tool.

Roller feeds are also known from other areas of application. For example, a roller feed can have a profiled roller and emboss or stamp the corresponding profile into the workpiece as the workpiece is advanced.

The principle of the roller feed is basically based on at least two rollers, of which at least a first roller is arranged on a first side (for example above) of the workpiece to be conveyed and a second roller on an opposite side (for example below) of the workpiece to be conveyed, as in figure 1 shown. If the roller feed comprises two rollers, these are typically arranged opposite one another. Other arrangements are also possible. For example, a roller feed may comprise three rollers (or a different number of rollers), the rollers being arranged offset from one another, so that the workpiece is conveyed through the rollers in a type of wave motion.

At least one of the rollers is a driven roller. For feeding/conveying, the workpiece is pushed into a gap formed between the rollers introduced. The workpiece is then advanced/conveyed by a parallel rotation of the rollers. The speed of rotation of the rollers determines the conveying or feed speed.

Conventional rollers typically include a roller body on which bearing shafts are attached in a rotationally fixed manner on both sides. The bearing shafts are used to mount the roller, to deliver an output torque and/or to absorb a drive torque. Typically, each roll is stored separately. A drive shaft of a motor or a transmission, which transmits a drive torque to the roller, or an output shaft, which absorbs an output torque from the roller, must be additionally mounted. In any case, four bearing points must therefore typically be provided for a roller arrangement.

In addition, the production of conventional rollers is complex and expensive, since the bearing shafts must be connected to the roller body in such a way that the two bearing shafts and the roller body are aligned exactly coaxially. The roller body typically has corresponding bearing shaft receptacles, which each engage with a corresponding bearing shaft in a form-fitting, form-fitting and material-fitting manner and/or in a form-fitting and force-fitting manner. In order to achieve an exact alignment of the two bearing shafts and the shaft body, the bearing shaft mounts and corresponding mounting flanges of the bearing shafts must be manufactured with high precision and low tolerances. This makes production expensive and complex. As a rule, many process steps are necessary to produce a conventional roller. As a result, the delivery times for conventional rollers are long and the number of suppliers is small.

Furthermore, in the case of conventional rollers, the diameter of the bearing shafts, in particular the diameter in the area where the drive torque is absorbed or the diameter in the area where the output torque is output, is small. In the event of overload or peak loads, this can lead to damage, in particular to the roller (or the bearing shafts) breaking. In addition, the connection between the roller body and the bearing shaft is often prone to damage, such as can be caused by overload.

If a roller is damaged, it must be replaced. Extensive dismantling of the roller feed is often necessary for this. This is associated with undesirably long downtimes of the roller feed.

The object of the present invention is to eliminate at least some of the aforementioned disadvantages. In particular, a roller and a roller feed are to be provided which at least partially overcome the disadvantages.

The roller should have a simplified structure and be easy and inexpensive to manufacture. In addition, a roller feed is to be provided, which enables simplified installation or easy replacement of the roller(s).

Description of the invention

These objects are achieved, at least in part, by a tube roll according to the invention, a roll feed and a method for producing a tube roll according to the independent claims. Further aspects of the invention are set out in the dependent claims.

In particular, the above objects are achieved, at least in part, by a tube roller according to the invention. The tube roller includes a first end and a second end, and a radially circumferential roller surface disposed between the first and second ends and configured to contact a workpiece. The rolling surface can in particular be a cylindrical rolling surface.

The tube roller is set up in particular for a roller feed. The workpiece that comes into contact with the rolling surface can be a band or strip material which—if the tube roller is built into a roller feed—is conveyed/advanced by means of the tube roller. The conveying or feed movement is transmitted from the roller to the workpiece via the roller surface.

The rolling surface has an outer diameter d _a (convex area). The rolling surface with outside diameter d _a can be profiled. In particular, the rolling surface can have projections and/or recesses which profile and/or punch a conveyed workpiece during conveying. When the tube roll is used for profiling/stamping in a roll feed, it typically interacts with a second roll. The rolling surface of the tube roller can have a positive shape or a negative shape. A rolling surface of the second roller, which can also be a tubular roller, accordingly has a negative shape or a positive shape.

The outer diameter d _a of the rolling surface can be in the range from 30 mm to 200 mm, preferably in the range from 44 mm to 150 mm, more preferably in the range from 60 mm to 120 mm and most preferably in the range from 80 mm to 100 mm. The axial length of the rolling surface (or the feed passage width) can be in the range from 250 mm to 2000 mm, preferably in the range from 320 mm to 1600 mm, more preferably in the range from 480 mm to 1200 mm and most preferably in the range of 640 mm up to 820 mm.

In addition, the tubular roller has a hollow inner area in the area of the rolling surface, which has an inner diameter d _i (concave area). The rolling surface and hollow interior are substantially concentric (manufacturing tolerances included). In particular, the tube roller may have been made from a tube having a hollow interior with an inner diameter. The inner diameter d _i of the hollow interior of the tube roll can correspond to the inner diameter of the hollow interior of the tube, or the interior of the tube roll can be finished (e.g. by machining, grinding, or other manufacturing processes) so that the inner diameter d _i of the hollow interior of the tube roll is larger is the inner diameter of the interior of the tube.

In the region of the rolling surface, the tubular roller preferably has a wall thickness t (t=(d _a -d _i )/2) in the range from 3 mm to 15 mm, preferably in the range from 4 mm to 10 mm and particularly preferably in the range of 5 mm up to 7 mm.

The tube from which the tube roller may be made may be welded or seamless tube. For example, the tube may have been made by any of the following processes: extrusion, continuous casting, centrifugal casting, cross rolling, plug rolling, stretch reducing, a push bench process, a pilger step process, and/or the like. It is also possible for the tube to be a machined tube.

The tube roller also includes a first bearing surface which is designed to interact with a bearing in order to support the tube roller so that it can rotate about an axis of rotation. The first bearing surface has a diameter d _la that satisfies the following condition: d _i ≦d _la ≦d _a .

The first bearing surface can in particular be set up with a rotary bearing, such as a plain bearing, a roller bearing, or the like to cooperate. If the bearing surface interacts with a plain bearing, for example, the bearing surface can have a corresponding surface quality in order to rotate radially in a plain bearing bush of the plain bearing. If the bearing surface is to interact with a roller bearing, the bearing surface can accommodate a bearing ring of the roller bearing (eg with a positive fit and/or with a force fit).

Thus, the diameter of the first bearing surface is greater than or equal to the inside diameter d _i of the hollow interior of the tube roller and smaller than or equal to the diameter d _a of the rolling surface. The first bearing surface can thus be formed integrally with the tube roller. For example, the bearing surface may have been turned onto the tube roller, since the diameter d _la of the first bearing surface (seen in the radial direction) is in the range of the wall thickness of the area in which the roller surface is arranged. The bearing surface can also have been produced by other production processes (eg by cutting or grinding).

The first bearing surface has a very large diameter compared to conventional rolls, so that the risk of damage and/or overload fracture of the tube roll is minimized. In addition, the first bearing surface is not arranged on a separate bearing shaft, so that the risk of damage, e.g. due to overload, can be further reduced.

The tube roller can further comprise a second bearing surface, for rotatably supporting the tube roller, which is opposite the first bearing surface in the axial direction. In particular, the first bearing surface can be arranged in the vicinity of the first end or at the first end and the second bearing surface can be arranged in the vicinity of the second end or at the second end. The second bearing surface can in particular be set up to interact with a rotary bearing, such as a plain bearing, a roller bearing or the like. If the bearing surface interacts with a plain bearing, for example, the bearing surface can have a corresponding surface quality in order to rotate radially in a plain bearing bush of the plain bearing. If the bearing surface is to interact with a roller bearing, the bearing surface can accommodate a bearing ring of the roller bearing (e.g. in a positive and/or non-positive manner).

The second bearing surface has a diameter d _lb that satisfies the following condition: d _i ≦d _lb ≦d _a .

Thus, the diameter of the second bearing surface is greater than or equal to and smaller than or equal to the inside diameter d _i of the hollow interior of the tube roller the diameter d _a of the rolling surface. The second bearing surface can thus be formed integrally with the tube roller. For example, the bearing surface may have been turned onto the tube roller, since the diameter d _lb of the second bearing surface (seen in the radial direction) is in the range of the wall thickness of the area in which the roller surface is arranged. The bearing surface can also have been produced by other production processes (eg by cutting or grinding). The second bearing surface has a very large diameter compared to conventional rollers, so that the risk of damage and/or overload fracture of the tube roller is minimized.

In addition, the first bearing surface and the second bearing surface are optionally configured such that d _lb <d _la applies. This enables the tube roller to be easily installed in a roller feed. For example, the tube roller with the small bearing diameter d _lb of the second bearing surface in front can be pushed into or removed from the roller feed in the axial direction. For this purpose, only an installation opening for the tube roller must be provided in the roller feed, which is dimensioned such that the tube roller fits through the installation opening. If the tube roller has only one bearing surface (ie the first bearing surface), the tube roller is preferably inserted into a roller slot with the first bearing surface first. It is also possible to insert the tube roller in the opposite direction.

The diameter d _la of the first bearing surface and/or the diameter d _lb of the second bearing surface can be an inside diameter. Optionally, the first bearing surface and/or the second bearing surface can be arranged in the area of the rolling surface. The bearing surface(s) and the rolling surface can thus be formed in an integral component. Since in this case the first bearing surface and/or the second bearing surface is an inner surface, almost the entire length of the tube roller (from the first end to the second end) can be used as a rolling surface. This makes it possible to provide very short tube rollers, since no additional installation space has to be provided for the bearing surfaces in the axial direction.

Likewise, the diameter d _la of the first bearing surface and/or the diameter d _lb of the second bearing surface can be an outside diameter. It is also possible that the diameter d _la is an outside diameter and the diameter d _lb is an inside diameter. It is also possible that the diameter d _lb is an outside diameter and the diameter d _la is an inside diameter.

Optionally, the first bearing surface is arranged between the first end of the tubular roller and the rolling surface and/or the second bearing surface is arranged between the second end of the tubular roller and the rolling surface. The bearing surface(s) and the rolling surface can thus be formed in an integral component. Since in this case the first bearing surface and/or the second bearing surface is an external surface, the bearing surface is/are easily accessible and can be easily manufactured (e.g. by turning or grinding). This enables cost-effective production.

At the second end, the tubular roller can comprise a shaft receptacle which is set up to receive a bearing shaft in a rotationally fixed manner. In particular, a bearing shaft can be accommodated in a rotationally fixed manner in the shaft receptacle. The non-rotatable mount can be positive, non-positive and/or material, for example by screwing, pressing, welding and/or other shaft connection techniques. The bearing shaft can, for example, interact with a roller coupling, such as a Schmidt coupling, which makes it possible to adjust the tube roller in the radial direction and at the same time couples the roller to a shaft that is immovable in the radial direction. Thus, in a roller feed, the gap between two rollers can be adjusted to a material thickness of the workpiece being conveyed/advanced.

The tubular roller can include a centering surface which is set up to receive a rotor of an electric motor in a rotationally fixed manner. The centering surface then has an inside diameter or an outside diameter, with the diameter of the centering surface d _z satisfying the following condition: d _i ≦d _z <d _a and optionally also the following condition: d _i ≦d _z <d _a

The centering surface is a radially circumferential surface. If the centering surface has an inner diameter (i.e., it is concave), the rotor may be a rotor of an external rotor electric motor. If the centering surface has an outer diameter (i.e. it is convex), the rotor may be a rotor of an internal rotor electric motor. By accommodating the rotor on a centering surface of the tube roll, the number of bearings in a corresponding roll feed can be minimized, since the tube roll is also the drive shaft. A separate storage of a drive shaft is not required.

If the diameter d _z of the centering surface satisfies the condition d _i ≦d _z <d _a , the diameter of the centering surface is greater than or equal to the inside diameter d _i of the hollow interior of the tube roller and smaller than the diameter d _a der rolling surface. The centering surface can thus be formed integrally with the tube roller. For example, the centering surface may have been turned onto the tube roller, since the diameter d _z of the centering surface (seen in the radial direction) is in the range of the wall thickness of the area in which the roller surface is arranged. The centering surface can also have been produced by other production processes (eg by cutting or grinding). In addition, the centering surface has a very large diameter compared to conventional rollers or drive shafts, so that the risk of damage and/or overload fracture of the tube roller is minimized.

If the condition d _i ≤ d _z < dl _a is met and the centering surface has an outside diameter, the tube roller can be easily installed in a roll feed (e.g. by pushing it in axially), since the diameter d _z of the centering surface is smaller than the diameter d _la the first storage area. If the centering surface has an inner diameter, the condition d _i ≦dl _a <d _z can accordingly be met in order to enable simple installation.

A clamping element can be arranged between the centering surface and the rotor of the electric motor. The clamping element is, for example, a centering clamping element, such as a cone clamping element, so that the rotor is centered relative to the tube roller when the rotor is held in a rotationally fixed manner. The centering surface is optionally formed on the first end of the tube roller. In particular, the centering surface can be formed integrally with the tube roller and, for example, turned on at the first end of the tube roller. The centering surface enables the tube roller to be centered exactly. In this way, optimal concentricity of the tube roller can be achieved.

The tube roller can also include a gear element receptacle, which makes it possible to connect a gear element (for example a toothed wheel) to the tube roller in a torque-proof manner. The transmission element receptacle is preferably arranged at the second end of the tube roller.

The hollow inner area of the tube roller can be set up to at least partially accommodate an external rotor motor and/or a rotary encoder. The encoder is preferably used to control an electric motor that drives the tube roller. A first part of the encoder (eg an optical sensor surface) can be connected to the tube roller in a rotationally fixed manner, so that the first part of the encoder rotates with the tube roller. A second part of the rotary encoder (for example an optical sensor and/or evaluation electronics) can be, at least partially, in the tube roller be arranged without rotating with the tube roller. The relative movement between the first part of the encoder and the second part of the encoder can be detected and used to control an electric motor. By arranging the rotary encoder, at least partially, in the hollow interior, the overall size of a roller feed can be minimized, since the hollow interior is now available as additional installation space. The hollow inner area of the tube roller can also be set up to accommodate further or other components of a roller feed, such as a temperature sensor, a cable bushing, and the like.

In addition, the above objects are achieved, at least in part, by a roller feed according to the invention. The roller feed comprises at least a first roller and a second roller, the first and the second roller being arranged in such a way that they are set up to convey a workpiece with the roller feed. For feeding/conveying, the workpiece is introduced into a gap formed between the rollers. The workpiece is then advanced/conveyed by a parallel rotation of the rollers. The speed of rotation of the rollers determines the conveying or feed speed.

The roll feed is adapted to be driven by a motor (e.g. an electric motor). The motor can be part of the roller feed or can be coupled to the roller feed to drive it. For example, the roller feed is configured in such a way that at least the second roller can be driven. It is also possible to actively drive the first roller or several rollers of the roller feed, i.e. with motors.

The first roll and/or the second roll is a tube roll according to the invention, as described above. Thus, all the advantages mentioned can be achieved with the roller feed. In particular, the installation or replacement of the rolls can be simplified. In addition, due to the larger bearing/centering surfaces, the tube rollers are less susceptible to damage, especially damage caused by overloading. Also, due to the use of tube rollers, the manufacturing and maintenance costs of the roller feed can be reduced.

The roll feeder may include a body that houses the first roll and the second roll. The body has a first bearing surface associated with a first bearing surface of the tube roller. Optionally, the body has a second bearing surface associated with a second bearing surface of the tube roll for rotatably supporting the tube roll in the body. between the respective Bearing surfaces of the tubular roller and the associated bearing surface of the base body can be arranged a bearing (for example, a roller bearing, a plain bearing, ...).

The base body can be made in several pieces and can include a housing, for example. In particular, the base body can be designed in such a way that the at least one tubular roller can be removed from the base body in the axial direction. For this purpose, the base body can have at least one installation opening through which a tubular roller can be inserted or removed axially. The installation opening can be closed with a cap, in particular a centered cap, with the centered cap preferably comprising a bearing surface of the base body. This means that the tube rollers can be installed/exchanged easily.

The roll feed may include a gear assembly and wherein a first gear (e.g., a gear) is associated with the first roll and a second gear (e.g., a gear) is associated with the second roll. A rotational movement of the second (actively driven) roller can be transmitted via the second gear element to the first gear element and then to the first roller. The transfer can be direct or indirect. The gear arrangement can be a multi-stage gear and/or can include clutches.

The roll feed may include a roll clutch (e.g. a Schmidt clutch) which enables the first roll to be shifted in the radial direction relative to the second roll. The roller coupling is preferably designed in such a way that the first roller can be adjusted in the radial direction and the roller is at the same time coupled to a shaft that is immovable in the radial direction. Thus, in the roll feed, the gap between the first and second rolls can be adjusted to a material thickness of the conveyed/feed workpiece.

Optionally, the roller feed optionally includes an actuator (eg, an electric motor, a hydraulic actuator, a pneumatic actuator, a solenoid, and/or the like) to actively radially adjust the first roller relative to the second roller. A contact pressure from the roller to the workpiece can also be set via the actuator. This enables, for example, the profiling or punching of the workpiece. In addition, the actuator makes it easier to insert the workpiece between the rollers.

The roller feed may include a rotary encoder which is used to control the electric motor, and the rotary encoder is optionally at least partially accommodated in the hollow interior of the tube roller. Thus, the size of the roll feed can be minimized.

• Bereitstellen eines Rohres,
• Ablängen des Rohres, um einen Walzenrohling mit einem ersten und einem zweiten Ende zu erzeugen,
• Herstellen einer Walzfläche zwischen dem ersten und dem zweiten Ende mit einem Außendurchmesser d_a, wobei Walzenrohling im Bereich der hergestellten Walzfläche einen hohlen Innenbereich aufweist, der einen Innendurchmesser d_i aufweist, und wobei die Walzfläche und der hohle Innenbereich im Wesentlichen konzentrisch angeordnet sind, und
• Herstellen einer ersten Lagerfläche, die dazu eingerichtet ist mit einem Lager zusammenzuwirken, um die Rohrwalze um eine Rotationsachse drehbar zu lagern, wobei die erste Lagerfläche einen Durchmesser d_la aufweist, der die folgende Bedingung erfüllt: d_i ≤ d_la ≤ d_a.

The objects are achieved, at least in part, by a method for producing a tube roller. The procedure includes the following steps, which can be performed in any order:

• providing a tube,
• cutting the tube to length to produce a roll blank having a first and a second end,
• Manufacturing a rolling surface between the first and the second end with an outer diameter d _a , wherein the roll blank in the region of the manufactured rolling surface has a hollow inner region which has an inner diameter d _i , and wherein the rolling surface and the hollow inner region are arranged essentially concentrically, and
• Producing a first bearing surface, which is designed to cooperate with a bearing to support the tube roller rotatably about an axis of rotation, the first bearing surface having a diameter d _la that satisfies the following condition: d _i ≤ d _la ≤ d _a .

In addition, the method can include steps for producing a second bearing surface, an intermediate surface, a centering surface and/or shaft mounts.

Brief description of the figures

Fig. 1

zeigt eine schematische Darstellung eines Walzenvorschubs, wie er aus dem Stand der Technik bekannt ist;

Fig. 2

zeigt ein schematisches Funktionsprinzip eines Walzenvorschubs;

Fig. 3A

zeigt eine schematische Darstellung einer erfindungsgemäßen Rohrwalze;

Fig. 3B

zeigt eine schematische Darstellung einer weiteren erfindungsgemäßen Rohrwalze;

Fig. 4A

zeigt eine schematische Darstellung eines erfindungsgemäßen Walzenvorschubs;

Fig. 4B

zeigt den Walzenvorschub aus Fig. 4A bei der Montage/Demontage;

Fig. 5

zeigt eine schematische Darstellung eines weiteren erfindungsgemäßen Walzenvorschubs;

Fig. 6

zeigt eine schematische Darstellung eines weiteren erfindungsgemäßen Walzenvorschubs, und

Fig. 7

zeigt einen schematischen Ablauf eines Verfahrens zur Herstellung einer Rohrwalze.

The accompanying figures are briefly described below.

1

shows a schematic representation of a roll feed as is known from the prior art;

2

shows a schematic functional principle of a roll feed;

Figure 3A

shows a schematic representation of a tube roller according to the invention;

Figure 3B

shows a schematic representation of a further tube roller according to the invention;

Figure 4A

shows a schematic representation of a roll feed according to the invention;

Figure 4B

shows the roller feed Figure 4A during assembly/disassembly;

figure 5

shows a schematic representation of a further roll feed according to the invention;

6

shows a schematic representation of a further roll feed according to the invention, and

7

shows a schematic sequence of a method for producing a tube roller.

Detailed description of the figures

In particular shows 1 shows a schematic representation of a roller feed 1, as is known from the prior art. The roller feed 1 comprises two rollers 100, 150. A first roller 150 is arranged above and a second roller 100 is arranged below a workpiece to be conveyed. The second roller 100 is driven via an electric motor 70 and is coupled to the first roller 150 via an output shaft and a gear arrangement (here a spur gear) 20 . The first roller 150 can be adjusted in the radial direction by means of a Schmidt coupling 90 in order to be able to set a gap between the first and the second roller.

The conventional rollers 100, 150 comprise a roller body 110 on which bearing shafts 180a, 180b are fixed in a rotationally fixed manner on both sides. The bearing shafts 180a, 180b are used to mount the roller 100, 150, to deliver an output torque and/or to absorb a drive torque. The roller 100 is connected to the rotor 72 of the electric motor 70 via the bearing shaft 180a and the drive shaft 73 . The drive torque is transmitted to the roller 150 via the gear arrangement 20 . The roller 100 and the corresponding drive/electric motor are assigned five bearings 200a, 200b, 220, 270a, 270b (roller bearings here). The roller 150 is associated with three bearings 222, 250a, 250b.

In the case of the conventional rollers 100, 150, the diameter of the bearing shafts, in particular the diameter in the area where the drive torque is absorbed or the diameter in the area where the output torque is output, is small. In the event of overload or peak loads, this can lead to damage, in particular to the roller (or the bearing shafts) breaking. In addition, the connection between the roller body and the bearing shaft is often prone to damage, such as can be caused by overload. If a roller is damaged, it must be replaced. For this purpose, extensive dismantling of the roll feed 1 is necessary, since the rolls cannot simply be removed axially from the roll feed due to the bearing.

2 shows a schematic functional principle of a roller feed 2 according to the invention. The principle of the roller feed 2 is based on at least two rollers 300, 350. At least one of the rollers is designed as a tubular roller according to the invention. A first roller 300 is arranged on a first side of a workpiece 10 to be conveyed (here: above) and a second roller 350 is arranged on a second side of the workpiece 10 to be conveyed (here: below). The orientation of the roller feed is arbitrary, so that the workpiece can be conveyed horizontally, vertically or at any angle. If the roller feed comprises two rollers, these are typically arranged opposite one another. Other arrangements are also possible. For example, a roller feed may comprise three rollers (or a different number of rollers), the rollers being arranged offset from one another, so that the workpiece is conveyed through the rollers in a type of wave motion.

At least one of the rollers 300, 350 is a driven roller. For feeding/conveying, the workpiece 10 is introduced into a gap formed between the rollers 300,350. The workpiece 10 is then advanced/conveyed in the X direction by rotating the rollers in the same direction in the direction of rotation ω ₃₀₀ , ω ₃₅₀ . The speed of rotation of the rollers determines the conveying or feed speed.

One of the rollers (here roller 300) can interact with a roller clutch, such as a Schmidt clutch, which enables the roller to be adjusted in the radial direction Z. Thus, in the roller feed 2, the gap between two rollers can be adjusted to a material thickness of the workpiece 10 being conveyed/advanced. In addition, a simplified insertion of the workpiece between the rollers is made possible.

Figure 3A shows a schematic representation of a tube roller 300 according to the invention. The tube roller 300 comprises a first end 305a and a second end 305b. A radially circumferential rolling surface 302 is disposed between the first end 305a and the second end 305b and is adapted to contact a workpiece. The rolling surface 302 has an outside diameter d _a . This can be in the range from 30 mm to 200 mm, preferably in the range from 44 mm to 150 mm, more preferably in the range from 60 mm to 120 mm and most preferably in the range from 80 mm to 100 mm.

In the area of the rolling surface, the tube roller 300 has a hollow inner area 304 which has an inner diameter di. The rolling surface 302 and the hollow interior 304 are arranged substantially concentrically. In addition, the tube roller has a first bearing surface (see Fig. Figure 4A , 309a), which is set up to interact with a bearing in order to mount the tube roller 300 so that it can rotate about an axis of rotation 301. The first bearing surface has a diameter d _la that satisfies the following condition: d _i ≦d _la ≦d _a .

The diameter d _la of the first bearing surface in Figure 3A tube roller 300 shown is an inside diameter. In addition, the first bearing surface is arranged in the area of the rolling surface 302, which extends over the entire length of the roll. The axial length of the rolling surface (or the feed passage width) can be in the range from 250 mm to 2000 mm, preferably in the range from 320 mm to 1600 mm, more preferably in the range from 480 mm to 1200 mm and most preferably in the range of 640 mm up to 820 mm.

At the second end 305b, the tube roller 300 comprises a shaft receptacle 308 which is set up to receive a bearing shaft in a rotationally fixed manner.

Figure 3B shows a schematic representation of a further tube roller 350 according to the invention. The tube roller 350 comprises a first end 355a and a second end 355b. A radially circumferential rolling surface 352 of tube roller 350 is disposed between first end 355a and second end 355b and is configured to contact a workpiece. The rolling surface 352 has an outside diameter d _a . This can be in the range of 30 mm to 200 mm, preferably in the range of 44 mm to 150 mm, more preferably in the range of 60 mm to 120 mm and most preferably in the range of 80 mm to 100 mm.

In the area of the rolling surface 352, the tubular roller has a hollow inner area 354 which has an inner diameter di. The rolling surface 352 and the hollow interior portion 354 are arranged substantially concentrically.

A first bearing surface 359a is configured to cooperate with a bearing to support the tube roller 350 rotatably about an axis of rotation 351 . The first bearing surface 359a has a diameter d _la that satisfies the following condition: d _i ≦d _la ≦d _a .

The tube roller 350 further includes a second bearing surface 359b for rotatably supporting the tube roller, which is opposite to the first bearing surface 359a in the axial direction. The second bearing surface 359b has a diameter d _lb that satisfies the following condition: d _i ≤ d _lb ≤ d _a . In addition, the first bearing surface 359a and the second bearing surface 359b are configured in the configuration shown such that d _lb <d _la applies.

The diameter d _la of the first bearing surface 359a and the diameter d _lb of the second bearing surface 359b are each outside diameters. The first bearing surface 359a is arranged between the first end 355a of the tube roller and the rolling surface 352 and the second bearing surface 359b between the second end 355b of the tube roller and the rolling surface 352 . The tube roller 350 is therefore suitable for being pushed into a roller feed in the axial direction (see Fig. Figure 4B ).

The tube roller 350 includes a centering surface 360 which is set up to receive a rotor 72 of an electric motor 70 in a rotationally fixed manner (see Fig. Figure 4A ). The centering surface has 360 an outer diameter d _z that satisfies the following conditions: d _i ≦d _z <d _a and d _i ≦d _z <d _a . The tube roller 350 is therefore suitable for being pushed into a roller feed in the axial direction (see Fig. Figure 4B ). The large diameter d _z also minimizes the risk of roll breakage, eg due to overload, compared to conventional rolls.

A clamping element 60 is arranged between the centering surface 360 and the rotor 72 of the electric motor 70 (see Fig. Figure 4A ). The clamping element 60 is, for example, a centering clamping element, such as a cone clamping element, so that the rotor 72 is centered relative to the tube roller 350 when the rotor 72 is held for rotation. the Tube roller 350 also includes a centering surface 360, which is designed for this purpose with a cone clamping element 60 (see Fig. Figure 4A ) to work together. The centering surface 360 is formed at the first end 355a of the tube roller 350 .

The tube roller 350 also includes a gear element receptacle 320 which makes it possible to connect a gear element 22 (for example a toothed wheel) to the tube roller 350 in a torque-proof manner. The gear element receptacle is preferably arranged at the second end 355b of the tube roller.

An intermediate surface 370 can be arranged between the centering surface 360 and the first bearing surface 359a, which has a diameter d _zw , the diameter fulfilling the condition d _z <d _zw <d _la . Intermediate surface 370 facilitates the sliding of a bearing onto bearing surface 359a.

Figure 4A shows a schematic representation of a roller feed according to the invention 4 and Figure 4B shows the roller feed 4 during assembly and disassembly.

The roller feed 4 shown comprises a first roller 300, which is of the type shown in Figure 3A shown tube roller corresponds. In addition, the roller feed 4 includes a second roller 350, which is the one in Figure 3B shown tube roller corresponds. The first and the second roller 300, 350 are arranged in such a way that they are set up to convey a workpiece (not shown) through the roller feed 4.

An electric motor 70 of the roller feed 4 is set up to drive the second roller 350 . The roller feed 4 also includes a gear arrangement 20. A first gear element 21 is assigned to the first roller 300 and a second gear element 22 to the second roller 350. A rotational movement of the second roller 350 is transmitted via the second gear element 22 to the first gear element 21 and then to the first roller 300 . The first and the second gear element are designed here as spur gears.

A roller clutch 90 , for example a Schmidt clutch, is arranged between the first transmission element 21 and the first roller 300 , which enables the first roller 300 to be adjusted in the radial direction Z relative to the second roller 350 . At the same time, the first roller 300 remains coupled to the first transmission element via the roller clutch. Thus, a gap can be adjusted between the first and the second roller and the first roller via the gear arrangement 20 are driven. The roller feed 4 shown also includes an actuator 95 which is set up to actively radially adjust the first roller 300 relative to the second roller 350 .

The roller feed 4 further comprises a base body 30 which accommodates the first roller 300 and the second roller 350 . The base body 30 is designed in such a way that the rollers 300, 350 can be removed from the base body 30 in the axial direction, as shown in FIG Figure 4B shown. In the view of Figure 4B the first roller 300 can be removed from the base body to the right and the second roller 350 to the left.

The body has a first bearing surface 39a associated with a first bearing surface 359a of tube roller 350 . In addition, the body has a second bearing surface 39b associated with a second bearing surface 359b of the tube roller 350 to rotatably support the tube roller 350 in the body 30 . Roller bearings 250a, 250b are arranged between the bearing surfaces 39a, 39b and 359a, 359b. The gear element 22 is connected to the roller 350 in a rotationally fixed manner at the second end 355b.

The tube roller 350 receives a rotor 72 of the electric motor 70 on the centering surface 360 in a rotationally fixed manner. In addition, the tube roller can be centered via the centering surface 360, which is designed to interact with a clamping element 60. This arrangement makes it possible to reduce the number of bearings required to a minimum. Here the tube roller is mounted at only two points. Additional bearings for an input or output shaft can be omitted.

The tube roller 300 has a first bearing surface 309a which cooperates with a bearing 200a to rotatably support the tube roller 300 about an axis of rotation. At the second end 305b, the tube roller 300 comprises a shaft receptacle 308 which receives a bearing shaft 80 in a rotationally fixed manner. The bearing shaft 80 is supported on the bearing 200b and is connected to the roller clutch 90 .

The roller feed 4 also includes a rotary encoder 40 which is used to control the electric motor 70 . The encoder may be at least partially received within the hollow interior 354 of the tube roller 350 .

figure 5 shows a schematic representation of a further roller feed 5 according to the invention. Here the rotary encoder 40 is outside of the tubular roller 350 arranged. The rest of the structure of the roller feed 5 corresponds to the roller feed from the Figures 4A and 4B . A workpiece 10 is conveyed between the rollers 300 , 350 .

6 shows a schematic representation of a further roller feed 6 according to the invention. In the roller feed 6 shown, both rollers 300', 350' are similar to those in FIG Figure 3A shown tube roller 300 is formed. An electric motor (not shown) drives the lower roller 350' via a drive shaft which is also a bearing shaft 85'.

The tube rollers 300', 350' each have a first bearing surface on 309a, 359a, which cooperate with a bearing 200a, 250a to support the tube roller 300', 350' rotatably about an axis of rotation. At the second end 305b, the tube roller 300' comprises a shaft receptacle 308 which receives a bearing shaft 80' in a rotationally fixed manner. The bearing shaft 80 is mounted on the bearing 200b and is connected to the transmission element 21 via the roller clutch 90 . At the second end 355b, the tube roller 350' comprises a shaft receptacle 358 which receives a bearing shaft 85' in a rotationally fixed manner. The bearing shaft 85' is mounted on the bearing 250b and is connected to an electric motor for driving the roller 350'. In addition, a gear element 22 is held in a rotationally fixed manner on the bearing shaft 85' and engages with the gear element 21 in order to also drive the roller 300'.

The bearings 200a, 250a' are each accommodated on bearing surfaces of the base body 30 of the roll feeder 6. The base body 30 is designed in several pieces and includes a housing. In particular, the base body 30 of the roller feed 6 is designed in such a way that the tube rollers 300′, 350′ can be removed from the base body 30 in the axial direction (to the left in the illustration shown). For this purpose, the base body has at least one installation opening. In the embodiment shown, the base body 30 has two installation openings. The roller 300' can be inserted or removed axially through a first installation opening. The roller 350' can be inserted or removed axially through a second installation opening. The installation openings are each closed with a cap, in particular a centered cap 34 , 35 , the centered cap encompassing a bearing surface of the base body 30 . This means that the tube rollers can be installed/exchanged easily.

• Bereitstellen 1100 eines Rohres,
• Ablängen 1200 des Rohres, um einen Walzenrohling mit einem ersten und einem zweiten Ende zu erzeugen,
• Herstellen 1300 einer Walzfläche zwischen dem ersten und dem zweiten Ende mit einem Außendurchmesser d_a, wobei Walzenrohling im Bereich der hergestellten Walzfläche einen hohlen Innenbereich aufweist, der einen Innendurchmesser d_i aufweist, und wobei die Walzfläche und der hohle Innenbereich im Wesentlichen konzentrisch angeordnet sind, und
• Herstellen 1400 einer ersten Lagerfläche, die dazu eingerichtet ist mit einem Lager zusammenzuwirken, um die Rohrwalze (300; 350) um eine Rotationsachse (301; 351) drehbar zu lagern, wobei die erste Lagerfläche (309a; 359a) einen Durchmesser d_la aufweist, der die folgende Bedingung erfüllt: d_i ≤ d_la ≤ d_a.

7 shows a schematic sequence of a method 1000 for producing a tube roller 300; 350. The procedure consists of the following steps, which can be performed in any order:

• providing 1100 a tube,
• cutting 1200 the tube to produce a roll blank having a first and a second end,
• Manufacturing 1300 a rolling surface between the first and the second end with an outer diameter d _a , wherein the roll blank in the region of the rolling surface produced has a hollow inner area which has an inner diameter d _i , and wherein the rolling surface and the hollow inner area are arranged essentially concentrically, and
• Production 1400 of a first bearing surface which is set up to interact with a bearing in order to support the tube roller (300; 350) so as to be rotatable about an axis of rotation (301; 351), the first bearing surface (309a; 359a) having a diameter d _la , which satisfies the following condition: d _i ≤ d _la ≤ d _a .

6. Reference and symbol list

1

conventional roll feed

2, 4, 5, 6

roll feed

10

workpiece

20

gear arrangement

21

first gear element

22

second gear element

30

body

34.35

cap

39a, 39b

storage area

40

encoder

60

clamping element

70

electric motor

72

rotor

73

drive shaft

80

bearing shaft

80', 85'

bearing shaft

90

roller clutch

95

actuator

100

conventional roller

108a, 108b

bearing shaft mount

110

roller body

150

conventional roller

180a, 180b

bearing shaft

188a, 188b

mounting flange

200a, 200b

camp

220

output shaft bearing

222

camp

250a, 250b

camp

270a, 270b

driveshaft bearings

300

tube roller

301

axis of rotation

302

rolling surface

304

hollow interior

305a

first end

305b

second end

308

wave pickup

309a

first storage area

350

tube roller

351

axis of rotation

352

rolling surface

354

hollow interior

355a

first end

355b

second end

358

wave pickup

359a

first storage area

359b

second storage area

360

centering surface

370

interface

1000

procedure

1100

Provide

1200

cut to length

1300

Manufacture rolling surface

1400

Manufacture storage area

X

conveying direction

Z

radial direction

ω300

direction of rotation

ω350

direction of rotation

there

Diameter of the rolling surface

you

Diameter of the hollow interior

double

diameter of the centering surface

or

diameter of the interface

there

Diameter of the first bearing surface

dlb

Diameter of the second bearing surface

t

Wall thickness

Claims (15)

Tubular roller (300, 350, 300', 350'), in particular for a roller feed (2, 4, 5, 6), wherein
the tube roller (300, 350, 300', 350') comprises: a first end (305a; 355a) and a second end (305b; 355b); a radially circumferential rolling surface (302; 352), the rolling surface being disposed between the first end (305a; 355a) and the second end (305b; 355b) and being adapted to come into contact with a workpiece (10), the Rolling surface (302; 352) has an outer diameter d _a , and the tube roller (300, 350, 300', 350') has a hollow inner region (304; 354) in the region of the rolling surface, which has an inner diameter d _i , and wherein the rolling surface (302; 352) and the hollow interior (304; 354) are arranged substantially concentrically, and a first bearing surface (309a; 359a) which is designed to cooperate with a bearing to support the tube roller (300, 350, 300', 350') rotatably about an axis of rotation (301; 351), the first bearing surface (309a ; 359a) has a diameter d _la that satisfies the following condition: d _i ≤ d _la ≤ d _a . The tube roll (300, 350, 300', 350') of claim 1, wherein the tube roll (300, 350, 300', 350') further comprises a second bearing surface (359b) for rotatably supporting the tube roll that is the first bearing surface (309a; 359a) in the axial direction, and wherein
the second bearing surface (359b) has a diameter d _lb that satisfies the following condition: d _i ≤ d _lb ≤ d _a , and where
the first bearing surface (309a; 359a) and the second bearing surface (359b) are optionally configured such that d _lb <d _la applies. The tube roller (300) according to any one of the preceding claims, wherein the diameter d _la of the first bearing surface (309a) and/or the diameter d _lb of the second bearing surface is an inner diameter, and optionally wherein the first bearing surface (309a) and/or the second Bearing surface is arranged in the region of the rolling surface (302). The tube roller (350) according to any one of the preceding claims, wherein the diameter d _la of the first bearing surface (359a) and/or the diameter d _lb of the second bearing surface (359b) is an outer diameter, and optionally wherein the first bearing surface (359a) is between the first end (355a) of the tube roller and the rolling surface (352) and/or the second bearing surface (359b) is arranged between the second end (355b) of the tube roller and the rolling surface (352). The tube roller (300) according to one of the preceding claims, wherein the tube roller (300) at the second end (305b) comprises a shaft mount (308) which is adapted to receive a bearing shaft (80) in a rotationally fixed manner. The tube roller (350) according to any one of the preceding claims, wherein the tube roller (350) comprises a centering surface (360) which is set up to receive a rotor (72) of an electric motor (70) in a rotationally fixed manner, the centering surface (360) having an inner diameter or has an outer diameter, and wherein the diameter of the centering surface d _z satisfies the following condition: d _i ≤ d _z < d _a and optionally also satisfies the following condition: d _i ≤ d _z < dl _a The tube roller (350) according to the preceding claim, wherein a clamping element (60) is arranged between the centering surface (360) and the rotor (72) of the electric motor (70) and wherein the centering surface (360) is optionally formed at the first end (355a). is. The tube roller (350) of any preceding claim, wherein the hollow interior (354) is configured to at least partially receive a rotary encoder (40). Roller feed (2, 4, 5, 6) comprising: a first roller (300) and a second roller (350), the first and second rollers (300, 350) being arranged in such a way that they are set up to feed a workpiece (10) with the roller feed (2, 4, 5, 6) to promote wherein the roller feed is configured to be coupled to an electric motor (70) to drive (350) at least the second roller, and wherein the first roll (300) and/or the second roll (350) is a tube roll according to any one of claims 1 to 8. A roll feed (2, 4, 5, 6) as claimed in claim 9, wherein the roll feed comprises a body (30) accommodating the first roll (300) and the second roll (350) and wherein
the body (30) has a first bearing surface (39a) associated with a first bearing surface (359a) of the tube roll and optionally a second bearing surface (39b) associated with a second bearing surface (359b) of the tube roll (350). , in order to rotatably support the tube roller (350) in the base body (30). Roller feed (2, 4, 5, 6) according to claim 9 or 10, wherein
the roller feed comprises a gear arrangement (20), and wherein a first gear element (21) is assigned to the first roller (300) and a second gear element (22) to the second roller (350), and wherein
a rotational movement of the second roller (350) is transmitted via the second gear element (22) to the first gear element (21) and then to the first roller (300). Roller feed (2, 4, 5, 6) according to any one of claims 9 to 11, wherein
the roller feed comprises a roller clutch (90) which enables the first roller (300) to be adjusted in the radial direction relative to the second roller (350), and wherein
the roll feed optionally includes an actuator (95) to actively radially adjust the first roll (300) relative to the second roll (350). Roller feed (2, 4, 5, 6) according to any one of claims 9 to 12, wherein
the roller feed comprises a rotary encoder (40) which is used to control the electric motor (70), and wherein
the encoder (40) is optionally at least partially accommodated in the hollow interior (354) of the tube roller (350). Roller feed (2, 4, 5, 6) according to any one of claims 9 to 13, wherein
the base body (30) is designed in such a way that the at least one tubular roller (350) can be removed from the base body (30) in the axial direction. Method (1000) for manufacturing a tube roll (300; 350) according to any one of claims 1 to 8, the method comprising the following steps: providing (1100) a tube; cutting (1200) the tube to produce a roll blank having a first and a second end, Manufacturing (1300) a rolling surface between the first and the second end with an outer diameter d _a , wherein the roll blank in the region of the manufactured rolling surface has a hollow inner region which has an inner diameter d _i , and wherein the rolling surface and the hollow inner region are arranged essentially concentrically are and Manufacture (1400) of a first bearing surface which is designed to cooperate with a bearing in order to support the tube roller (300; 350) so as to be rotatable about an axis of rotation (301; 351), the first bearing surface (309a; 359a) having a diameter d _la which satisfies the following condition: d _i ≤ d _la ≤ d _a .

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