EP4284575A1

EP4284575A1 - Rolling tool unit for a rolling machine and method for reworking a rolling rod

Info

Publication number: EP4284575A1
Application number: EP21844303.4A
Authority: EP
Inventors: Dieter Prinz; Michael Weinberger; Florian Beutel; Rafael Schweda
Original assignee: Osg Ex Cell O GmbH
Current assignee: Osg Ex Cell O GmbH
Priority date: 2021-01-29
Filing date: 2021-12-22
Publication date: 2023-12-06
Also published as: DE102021102040B3; WO2022161713A1

Abstract

The invention relates to a rolling tool unit (13), comprising a rolling rod (14) having a first rolling profile (15) on a first side (19) and having a second rolling profile (16) on a second side (20). The first side (19) and the second side (20) are interconnected by means of two side regions (28) each having a support structure. A support unit (17) has two support parts (44) extending in the longitudinal direction (x), which extend along the rolling rod (14) and each of which contacts the support structure of an associated side region (28). The support parts (44) are spaced apart from each other in a transverse direction (y) and support the rolling rod (14) indirectly on a base surface (42) of a base body (40). The rolling rod (14) can be arranged on the support parts (44) such that either the first rolling profile (15) or the second rolling profile (16) faces away from the base surface (42), while the other rolling profile (16) or (15) is located between the support parts (44) and the base body (40) without coming into contact with the base surface (42).

Description

Rolling tool unit for a rolling machine and method for finishing a rolling bar

The invention relates to a rolling tool unit for a rolling machine and a method for finishing a rolling rod of such a rolling tool unit.

Rolling tool units are required in rolling machines in order to produce a profile in a workpiece by cold forming, for example a toothing, a thread, one or more oil grooves, knurling, etc. The rolling tool unit has a rolling bar with at least one rolled profile that is attached to the profile to be generated is adapted to the workpiece. During forming, two rolling tool units are used in a rolling machine, so that the two rolling rods face each other with their rolled profiles. The workpiece to be formed is placed between the two rolling rods. The rolling bars extend in a longitudinal direction. They are moved in opposite directions in the longitudinal direction and engage with their respective rolled profile in the workpiece to be formed, which rolls on the rolled profiles due to the longitudinal movement of the rolling rods. In this way, the desired profiling is formed in the workpiece.

When producing such a profile in a workpiece, the rolling rods are subject to wear. In order to get the desired profile in the workpiece, the rolled profile of a rolling bar needs to be reworked or the rolling bar needs to be replaced when worn out excessive wear has occurred during use.

DE 20 2004 012 067 U1 describes a rolling rod in which the rolled section or the heads of the rolled section extend along one plane. Such rolling rods are intended to be moved towards or away from the workpiece during cold forming in order to produce the profile on the workpiece. In one embodiment, the roller bar can have a roller profile on opposite sides, so that the roller bar can be used in two different setups in order to increase the service life. For this purpose, the rolling rod is fastened to a rolling rod holder at the front. Due to the fact that the tooth tips of the rolled sections run in parallel planes, the tooth tips facing away from the workpiece can be used as a support for the rolling rod in the rolling rod holder.

The rolling rod known from DE 20 2004 012 067 U1 can only be used in rolling machines in which an infeed orthogonal to the longitudinal direction of the rolling rod or the rolling tool unit toward or away from the workpiece is possible. Such an infeed is not available on all rolling machines. In addition, in the exemplary embodiment with two rolled sections, the rolled section that is not currently being used is also subjected to a high load, since it rests in the roller rod holder and serves to support the forming forces that occur on the roller rod holder.

Based on the prior art, it can be seen as an object of the present invention to create a rolling tool unit that has a long service life has and allows easy handling, especially in the post-processing of the rolled sections of the rolling rod.

This object is achieved with a rolling tool unit according to the features of patent claim 1 and a method with the features of patent claim 12.

The rolling tool unit according to the invention is set up for use in a rolling machine. For forming a workpiece in the rolling machine, two separate rolling tool units are required, which act on the workpiece from opposite sides. Each rolling die unit has a rolling rod extending in a longitudinal direction. The rolling bar has a first rolled section on a first side and a second rolled section on a second side. The first side and the second side are spaced from each other in a vertical direction. The first rolled section and the second rolled section face away from each other and are preferably aligned opposite to each other.

The roller bar has two side portions forming a third side and a fourth side. The two side regions are arranged at a distance from one another in a transverse direction and each connect the first side to the second side. A support structure is preferably present on each of the side areas, for example at least one support projection and/or at least one support depression.

[0010] The rolling tool unit also has a support unit which is provided separately from the rolling rod. is put . The support unit has two and in particular exactly two support parts which extend in the longitudinal direction parallel to one another and along the rolling rod. The support parts are preferably separate components, but can alternatively also be integrally connected to one another and/or form a common structural unit. The longitudinal extent of the support parts is preferably essentially as long as the longitudinal extent of the rolling rod. This allows the rolling rod to be supported over its entire length. Each support part engages on an associated side surface of the rolling rod and can be releasably connected to the support structure in a positive and/or non-positive manner. Via the support parts of the support unit, the roller bar is indirectly supported on a base surface, which can be formed on a base body of the support unit. The base surface preferably extends along a plane defined by the longitudinal and transverse directions. The support parts of the support unit are dimensioned in such a way that there is a gap between the base surface and the rolled profile facing the base surface on the first side or the second side of the rolled rod.

[0011] The rolling bar is thus stably supported on the base surface by the supporting parts extending along the rolling bar, so that no undesired deformations of the rolling bar occur during the cold forming of a workpiece. The support members may be longitudinally continuous or connected to the roll bar at a sufficient plurality of longitudinally spaced support locations. The rolled profile used for cold forming faces away from the base surface and faces the workpiece to be formed. The unused rolled profile points to the base surface and is at a distance from it. The gap formed avoids that the currently unused rolled section is subjected to an excessive load. It is just not used to support the rolling bar on the base surface and is therefore protected from damage. It is also possible to use rolling rods with rolled sections whose toothing is not arranged along a common plane, for example rolled sections with an entry area, a central area and an exit area, in which only the central area extends parallel to a plane. The rolled section that is not used is placed in a protected manner in the space between the two support parts and the base surface. The roller bar can be turned if one of the two roller profiles no longer guarantees sufficient accuracy of the profiling produced on the workpiece due to wear. When both rolling sections are worn, the rolling bar can be removed and reworked.

In addition, the rolling tool unit can be used in rolling machines with and without infeed orthogonal to the direction of extension of the rolling rod or the rolling tool unit toward the workpiece or away from the workpiece.

It is advantageous if the rolling rod has a supporting projection and preferably exactly one supporting projection in each of the side areas. Each support projection may extend along substantially the entire length of the first rolled section and the second rolled section. The support projection can have a rectangular contour in a section perpendicular to the longitudinal direction. At each

Support projection are a first contact surface and a second Investment area formed. The two contact surfaces preferably extend parallel to one another. The two contact surfaces are arranged at a distance from one another in the vertical direction. Each contact surface can extend parallel to a plane that is defined by the longitudinal direction and the transverse direction. The first and second contact surfaces face away from each other. In this way, a support structure that is easy to produce is present in the side areas, which ensures a simple connection to the support parts in both orientations of the rolling rod and ensures that the rolling rod can be positioned very precisely in the rolling machine in both orientations.

In a preferred embodiment of the support structure as a support projection in each side area, the first and second contact surfaces face away from one another. If, as an alternative to this, a support depression forms the support structure in each side area, the first and second contact surfaces can be formed by opposite sides of the support depression and thus face one another.

[ 0015 ] Preferably the support projections are integral or formed monolithically with the rolling rod. In a modified exemplary embodiment, the support projections can be releasably connected to the roller rod, e.g. B. be screwed to the rolling rod, resulting in a multi-part, in particular three-part design.

[0016] A counter-contact surface is preferably present on each support part. The two mating surfaces of the support parts extend in particular in a common plane that is parallel to the longitudinal direction and parallel to the

Can be aligned transversely. The counter surfaces are turned away from the base surface and, when the rolling tool unit is in the assembled state, are in contact either with the first contact surfaces of the rolling rod or with the second contact surfaces of the rolling rods.

The maximum distance between the first rolled section and the first contact surface in the vertical direction defines a first height. The maximum distance between the second rolled section and the second contact surface in the vertical direction defines a second height. It is preferred if the first height and the second height are equal. The distance between the base surface and the abutment surfaces of the support parts in the vertical direction defines a third height. In particular, the third height is greater than the first height and the second height, as a result of which a simple possibility is created for forming the intermediate space. The maximum distance between a rolled section and a contact surface is defined by a tip end of a tooth (outer end of the tooth) of the relevant rolled section that is furthest away from the contact surface.

As mentioned, the support unit can have a base body having the base surface. The base body can in particular be formed by at least one base plate. Each base plate has a thickness in the vertical direction that is significantly smaller than the transverse and longitudinal dimensions of the base plate. The at least one base plate or the base body is preferably non-positively and/or positively releasably connected to the support parts. As an alternative to this, the supporting parts and base bodies or at least one of the existing base plates can be permanently connected to one another or can be designed integrally or monolithically. [0019] The detachable connection between the base body and the support parts on the one hand and/or the support parts and the rolling rod on the other hand can be made by screws and/or bolts and/or pins and/or fitted screws. Viewed in the longitudinal direction, the connection points between the roller bar and the support parts can be offset from the connection points between the support parts and the base plate.

In a preferred embodiment, each support part can be a support bar with a rectangular cross-section. The support parts can be arranged at a distance from one another in the transverse direction which is equal to or greater than the width of the first rolled profile and the second rolled profile in the transverse direction.

In the case of the present invention, the roller bar preferably has a shape that deviates from a rectangular contour. For example, the rolled profiles have several groups of teeth. The crests of the teeth of one of the groups may be arranged along a common plane. The tip ends of at least one further group of teeth are arranged outside of this plane. Each rolled profile preferably has three groups of teeth. The tip ends, which extend along a common plane, can form a central area of the rolled profile. In the longitudinal direction, the central area can be adjoined by an entry area on one side and an exit area of the rolled profile on the other side. In the run-in area and in the run-out area, the tooth tip ends can be arranged outside of the plane that is defined by the tooth tip ends in the central area. Especially the height of the teeth from the bottom of an adjacent tooth gap to the end of the tooth head is smaller in the entry area than in the central area and/or in the exit area. The number of teeth in the central area is preferably smaller than in the inlet area and larger than in the outlet area. The number of teeth in the entry area is preferably greater than in the exit area.

One or more of the above-described exemplary embodiments of the rolling tool unit can be handled particularly easily during post-processing of the rolled sections of the rolling rod and allow exact positioning of the rolling rod in the rolling machine. This can be done, for example, as follows:

[0023] First, the rolling tool unit is removed from the rolling machine. The support parts are detached from both the rolling rod and the base body. The rolled sections of the rolling rod can then be reworked, for example by grinding, in order to compensate for the wear that has already occurred when the rolling rod was used. This post-processing of the rolled sections reduces the total height of the rolling rod, ie the maximum distance between the tooth head ends of the first rolled section and the tooth head ends of the second rolled section. This also reduces the distance between the rolled sections and the associated contact surfaces in the vertical direction. The reduced height must be compensated for in order for the rolling bar to assume the correct position in the rolling machine for forming a workpiece. For this purpose, the previously used base body is replaced or supplemented by a base body with a greater thickness or height in the vertical direction. sample way, the base body having at least one base plate can be supplemented by one or more further base plates. It is also possible to process a starting body used to produce the base body, if necessary by grinding or another method, so that the rolled profile used for forming has exactly the same vertical distance from the underside of the base body facing away from the base surface as before the post-processing rolled sections. Subsequently, the supporting parts, the base body and the rolling rod can be connected to one another again to form the rolling tool unit and arranged in the rolling machine. As explained, a gap remains between the unused rolled section and the facing base surface of the base body. In particular, the gap increases after each grinding operation

[0024] Advantageous configurations of the invention result from the dependent claims, the description and the drawings. Preferred exemplary embodiments of the invention are explained in detail below with reference to the attached drawings. Show it:

[0025] FIG. 1 shows a highly schematized, block diagram-like representation of a rolling machine with two rolling tool units for cold forming a workpiece,

[0026] FIG. 2 shows an exemplary embodiment of a rolling tool unit according to the invention with a rolling rod and a support unit in a schematic exploded view,

[0027] FIG. 3 shows the exemplary embodiment of the rolling tool unit from Figure 2 with a view in the longitudinal direction in the assembled state in a schematic representation,

[0028] FIG. 4 shows a modified exemplary embodiment of a rolling tool unit in a schematic representation with a view in the longitudinal direction,

Figures 5-7 the embodiment of the rolling tool unit according to Figure 3 in different stages before and after the finishing of rolling tool profiles of the rolling rod.

In Figure 1, a schematic diagram of a rolling machine 10 is illustrated. The rolling machine 10 is set up to produce a profile on a workpiece 11 by cold forming. For this purpose, the rolling machine 10 has two tool slides 12 arranged at a distance from one another in a vertical direction z. The tool slides 12 can be displaced in opposite directions in a longitudinal direction x. Each tool carriage 12 carries a rolling tool unit 13. The rolling tool units 13 are shown in FIG. On the side facing the workpiece 11, the rolling rods 14 each have a rolled profile 15, 16, which cannot be seen in FIG. During the movement of the tool carriage 12 in the longitudinal direction x, the rolled profiles are pressed into the workpiece 11, with the workpiece 11 rolling between the two rolling rods so that the profile is formed in the peripheral region of the workpiece 11. The type of profile can vary depending on the application and, for example, an external toothing, a thread, a or several oil grooves or knurling. Other rollable profile shapes are also possible. The rolling profiles of the rolling rods are designed accordingly.

The rolling machine 10 may have rolling bars 14 oriented vertically or horizontally. For example, the vertical can be aligned parallel to the vertical direction z or parallel to the longitudinal direction x.

The longitudinal direction x, the vertical direction z and a transverse direction y form a Cartesian coordinate system which is arranged in a stationary manner in relation to the rolling tool unit 13 in the present description.

In the figures 2 and 3 an embodiment of a rolling tool unit 13 is illustrated according to the present invention. The rolling tool unit 13 includes the rolling rod 14 and a support unit 17. The support unit 17 is designed in particular to arrange the rolling tool unit 13 in the vertical direction z on a support surface 18 of the tool carriage 12 of the rolling machine 10.

According to the present invention, the roller bar 14 has a first roller profile 15 on a first side 19 and a second roller profile 16 on a second side 20 of the roller bar 14 . The first rolled profile 15 and the second rolled profile 16 are designed identically in the example, but can also have different shapes or toothing as an alternative to the exemplary embodiment shown. The rolled sections 15, 16 can be mirror-symmetrical to a plane of symmetry which is aligned at right angles to the vertical direction z. Alternatively it can the first rolled profile 15 can be rotated by 180° about the vertical direction z in relation to the second rolled profile 16 in addition to being reflected on this plane of symmetry.

Each rolled section 15 has a plurality of teeth 21, which are arranged side by side in the longitudinal direction x and separated from one another by a tooth gap 22 in each case. In the vertical direction z, each tooth 21 has a tooth tip with a tooth tip end 23, which forms the outermost end of the tooth 21.

As shown schematically in FIG. 2, each rolled section 15, 16 has different areas in the longitudinal direction x, for example an entry area A, a central area B and an exit area C. Each area A, B, C has a plurality of teeth 21 and Tooth gaps 22. The number of teeth 21 is smaller in the central area B than in the lead-in area A and usually larger than in the lead-out area C. The number of teeth in the lead-in area A is, for example, larger than in the central area B and lead-out area C.

As can also be seen schematically in FIG. 2, the tooth head ends 23 are arranged in the central region B along a common plane E. In the entry area A, the tooth tip ends 23 are arranged at a distance from this plane E, with the distance between the tooth tip ends 23 from the plane E increasing the further the teeth 21 in the entry area A are from the central area B. In the run-out area C, too, the tooth tip ends 23 are arranged at a distance from the plane E, with this distance from the plane E increasing the further the teeth 21 are removed from the central area B. The teeth 21 can therefore be divided into three groups of teeth 21: a first group of teeth 21 in the central area B, a second group of teeth 21 in the Lead-in area A and a third group of teeth 21 in

Run-out area C

The depth of the tooth gaps 22 is constant in the central region B and can also be constant in the run-out region C. In contrast, the depth of the tooth gaps 22 decreases in the vertical direction z in the lead-in area A, the further away the tooth gap 22 is from the central area B. The depth of the tooth gaps 22 is shown schematically in FIG. 2 by a dashed line.

The rolling rod 14 has two opposite side areas 28 (FIG. 3), of which only one side area 28 can be seen in FIG. In each side area 28 there is a support structure that works together with the support unit 17, so that the roller rod 14 can be connected to the support unit 17 by means of the support structure in the side areas 28, for example by a force-fitting and/or form-fitting detachable connection.

In the exemplary embodiment according to FIGS. 2 and 3, each support structure is formed in one of the side regions 28 by one support projection 29, and in accordance with the example exactly one support projection. The supporting projection 29 has a first contact surface 30 and a second contact surface 31. The two contact surfaces 30, 31 are arranged at a distance from one another in the vertical direction z and face away from one another. In the exemplary embodiment, the contact surfaces 30, 31 each extend parallel to a plane that is defined by the longitudinal direction x and the transverse direction y.

Preferably, each support projection 29 has a rectangular cross-section. On the other hand, anyone could Supporting projection 29 has an outwardly tapering, in particular trapezoidal cross-section, in order, for example, to bring about or support centering in the transverse direction y. In this case, the mating contact surfaces 46 are adapted to the contact surfaces 30 , 31 and aligned obliquely to the transverse direction y and to the vertical direction z in order to ensure a planar contact.

The transitional contour between the contact surfaces 30 , 31 and the respectively adjoining side surface can preferably be chosen as desired. If necessary, a curvature, for example a defined radius, or at least one inclined transition surface can be formed there in order to counteract a possible notch effect with crack formation at this point.

The first bearing surfaces 30 of the rolled bar 14 are oriented in the same direction as the first rolled profile 15 . Analogous to this, the second contact surfaces 31 are oriented in the same direction as the second rolled profile 16 .

In order to brace the roller bar 14 on a fastening part 32 of the tool carriage 12 , the roller bar 14 has through holes 33 in the exemplary embodiment, which completely pass through the roller bar 14 in the transverse direction y. A fastening screw 34 can be inserted through each through-hole 33 and screwed to the fastening part 32, as a result of which the rolling rod 14 and the parts of the rolling tool unit 13 connected thereto are clamped in the transverse direction y against the fastening part 32 of the tool carriage 12. In the vertical direction z, the through holes 33 are longer than the diameter of the section of the fastening screw 34 that is passed through, see above that the fastening screw 34 can be positioned in the vertical direction z within the through holes 33 relative to the rolling rod 14 .

Alternatively, instead of the fastening screws 34, other clamping means, such as clamping claws, for example, can be used for the form-fitting and/or non-positive connection of the rolling rod 14 or the rolling tool unit 13 on the fastening part 32. The clamping force preferably acts exclusively in the transverse direction y.

The support unit 17 has a base body 40 which is formed by a base plate 41 in the exemplary embodiment. On the base body 40 or the base plate 41 there is a base surface 42 which extends parallel to a plane which is defined by the longitudinal direction x and the transverse direction y. On the side opposite the base surface 42 , the base body 40 or the base plate 41 has a base surface 43 which is preferably aligned parallel to the base surface 42 . The base surface 43 is set up to lie against the carrier surface 18 of the tool carriage 12 .

The base surface 43 and the support surface 18 preferably rest against one another when the rolling tool unit 13 is in the installed state, without directly establishing a positive or non-positive connection by means of a screw connection or the like between the base body 40 and the tool carriage 12 . No pressing force is generated between the base surface 43 and the carrier surface 18 via the clamping means for connecting the rolling tool unit 13 to the tool carriage 12 . The support unit 17 also has two support parts 44 which, in the exemplary embodiment according to FIGS. 2 and 3, are each formed by a support strip 45 with a rectangular cross section. Each support part 44 has a counter-abutment surface 46 which, according to the example, extends parallel to a plane which is defined by the longitudinal direction x and the transverse direction y. The mating surface 46 of each support part 44 faces away from the base surface 42 of the base body 40 . The mating contact surfaces 46 of the support parts 44 are designed to come into contact with an associated contact surface 30 or 31 in each case when the rolling tool unit 13 is in the installed state.

In FIGS. 2 and 3 positive and/or non-positive connections between the components of the rolling tool unit 13 are illustrated schematically by dash-dotted lines. The connections can be made, for example, by screws, fitted screws or dowel pins, bolts or other detachable connecting elements. In the exemplary embodiment, the rolling rod 14 is releasably connected in the vertical direction z through the support projections 29 at first connection points 50 to the respectively associated support part 44 in a force-fitting and/or form-fitting manner. The connection points 50 are arranged at a distance from one another in the longitudinal direction x (FIG. 2). At second connection points 51, each support part 44 is releasably connected to the base body 40 in a non-positive and/or positive manner. The second connection points 51 are offset in the longitudinal direction x relative to the first connection points 50 . The number of first connection points 50 and second connection points 51 can be the same or different. The connection points 50, 51 are preferably arranged and designed in such a way that the rolling rod 14 can be changed without the support unit 17 having to be removed from the rolling machine 10 or. the changing/rotating of the rolling rod 14 in the rolling machine 10 can take place while the support unit 17 remains attached to the tool carriage 12 .

As can be seen in particular from FIG. 2, the roller bar 14 is supported essentially along its entire length in the longitudinal direction x via the two support parts 44 on the base body 40 . Forces occurring in the vertical direction z during the forming of the workpiece 11 can thus be introduced very well via the support unit 17 via the carrier surface 18 into the tool slide 12 . Undesirable sagging of the roller bar 14 is thereby avoided during cold forming.

As can be seen in particular in FIG. 3, a first height h1 describes the maximum distance of a tooth tip end 23 of the first rolled profile 15 from the first contact surfaces 30 . Analogous to this, a second height h2 describes a maximum distance between the tooth tip ends 23 of the second rolled profile 16 and the second contact surfaces 31 . A third height h3 describes the distance between the mating contact surfaces 46 and the base surface 42 . The third height h3 is greater than the second height h2 and the first height hl. The rolled profile 15 , 16 , which is currently not being used for forming the workpiece 11 , thus lies opposite the facing base surface 42 , forming an intermediate space 47 , without coming into contact with the base surface 42 . During the cold forming of the workpiece 11 occurring and acting on the roller rod 14 forces are therefore not supported by the currently unused rolled section 15 or 16 facing the base surface 42 . Rather, the forces introduced are introduced into the tool carriage 12 via the supporting projections 29 , the supporting parts 44 and the base body 40 .

A fourth height h4 describes the maximum distance of a tooth tip end 23 of the first rolled section 15 from the second contact surfaces 31 and a fifth height h5 describes the maximum distance of the tooth tip ends 23 of the second rolled section 16 from the first contact surfaces 30. The fourth height h4 and the fifth Height h5 are always equal.

In operation, the rolling bar 14 of a rolling tool unit 13 can be used in two different orientations. One of these orientations is illustrated in FIG. Either the first rolled profile 15 can be used for forming the workpiece 11, while the second rolled profile 16 is arranged oppositely between the support parts 44 and the base body 40. In the other orientation, the rolling rod 14 is rotated through 180° about the longitudinal direction x or about the transverse direction z, with the second rolled profile 16 being used to form the workpiece 11, while the first rolled profile 15 is located between the support parts 44 and the base body 40 is arranged opposite.

If after a certain period of use both rolled sections 15, 16 are worn out, the rolling tool unit 13 is removed from the rolling machine 10. Subsequently, the support unit 17 can be removed from the rolling rod 14 and the rolled sections 15, 16 can be reworked, for example by grinding. They take first height hl and the second height h2 and thus also a total height. If the rolling rod 14 were to be positioned in the rolling machine 10 again with the same support unit 17, the distance between the rolled section 15, 16 used to form the workpiece 11 and the support surface 18 of the tool carriage 12 would be smaller than before, and the positioning of the rolling tool unit 13 in the rolling machine 10 faulty. For this reason, after the post-processing of the rolled sections 15, 16, the base body 40 or the base plate 41 is exchanged for a base body 40 or a base plate 41 with a greater thickness in the vertical direction z.

As an alternative to this, the base body 40 in all of the exemplary embodiments can also be constructed from a plurality of base plates 41 arranged one on top of the other in order to achieve the desired height in the vertical direction z, as is shown merely by way of example in FIG.

This procedure is illustrated schematically in FIGS. 5-7. In the case of a rolling rod 14 that has not yet been reworked and has a first overall height hgl (FIG. 5), the base body 40 has a first thickness dl. After the first post-processing of the rolled sections 15, 16, the rolling rod 14 has a smaller second overall height hg2 (FIG. 6) and a base body 40 with a second thickness d2 is used, which is greater than the first thickness dl. After further post-processing of the rolled sections 15, 16, the rolling rod 14 has a further reduced third total height hg3 (FIG. 7) and the base body 40 used has a third thickness d3, which is greater than the second thickness d2. Depending on the material removal required during post-processing, each rolling rod 14 can be post-processed several times, with the thickness of the base body 40 in

-2 fl of the rolling tool unit 13 is used, increases, as is illustrated merely by way of example for the two post-processing operations with reference to FIGS. 5-7.

In order to adapt the thickness of the base body 40 exactly to the material removal of the rolled sections 15, 16, a starting body or starting plate serving as the base body 40 or the base plate 41 can be machined by face grinding in order to ensure an exact positioning of the rolling rods 14 in the rolling machine 10 to ensure. As explained, the desired thickness can also be achieved by several base plates 41 arranged one above the other.

In Figure 4, a modified embodiment of a rolling tool unit 13 is illustrated. Instead of the supporting projections 29, the rolling rod 14 in this exemplary embodiment has groove-shaped supporting depressions 52 extending in the longitudinal direction x along the rolling rod 14. The support parts 44 are designed differently here than the support strips 45 and have support extensions 53 projecting towards one another in their area opposite the base body 40, with each support extension 53 of a support part 44 engaging in an associated support depression 52 of the rolling rod 14. The support extensions 53 each have the mating contact surface 46 on their side facing away from the base body 40. The opposing flanks of the support depression 52 form the contact surfaces 30, 31, which face one another in contrast to the previous exemplary embodiment. The first contact surface 30 is different from the previous one Embodiment in the vertical direction z arranged closer to the second rolled section 16 than to the first rolled section 15. Similarly, the second contact surface 31 is arranged closer to the first rolled section 15 than the second contact surface 31. The contact surfaces 30, 31 are arranged within the outer contour of the rolling rod 14 in this embodiment.

For the rest, reference can be made to the above description for an explanation of the exemplary embodiment according to FIG.

The invention relates to a rolling tool unit

13 comprising a rolling rod 14 with a first rolled section 15 on a first side 19 and a second rolled section 16 on a second side 20. The first side 19 and the second side 20 are connected to one another via two side regions 28, each of which has a support structure. A support unit 17 has two support parts 44 extending in the longitudinal direction x, which extend along the rolling rod

14 extend and act on the support structure in each case of an associated side area 28 . The support parts 44 are arranged at a distance from one another in a transverse direction y and support the rolling rod 14 indirectly on a base surface 42 of a base body 40 . The rolling rod 14 can be arranged on the support parts 44 in such a way that either the first rolled profile 15 or the second rolled profile 16 points away from the base surface 42, while the other rolled profile 16 or 15 is arranged between the support parts 44 and the base body 40, without coming into contact with the base surface 42. Reference character list :

10 rolling machine

11 workpiece

12 tool slides

13 rolling tool unit

14 roller bar

15 first rolled profile

16 second rolled profile

17 support unit

18 carrier surface

19 first page

20 second page

21 teeth

22 tooth gap

23 Tooth End

28 page range

29 support projection

30 first contact surface

31 second contact surface

32 mounting part

33 through hole

34 fixing screw

40 base bodies

41 base plate

42 base surface

43 footprint

44 support part

45 support bar

46 mating surface 47 space

50 first connection point

51 second junction

52 support recess

53 support extension

A Run-in area

B Central area

C outlet area dl first thickness d2 second thickness d3 third thickness

E level h1 first height h2 second height h3 third height hgl first total height hg2 second total height hg3 third total height x longitudinal direction y transverse direction z vertical direction

Claims

Patent claims :

1. Rolling tool unit (13) for a rolling machine (10) having:

- A rolling rod (14) extending in a longitudinal direction (x) and having a first rolled profile

(15) on a first side (19) and a second rolled section (16) on a second side (20) arranged in a vertical direction (z) at a distance from the first side (19), the first rolled section (15) and the second rolled profile (16) facing away from each other, and wherein the rolling rod (14) has two side regions (28) which connect the first side (19) and the second side (20) and are arranged at a distance from one another in a transverse direction (y),

- A support unit (17) having two in the longitudinal direction (x) parallel to each other and along the roller bar (14) extending support parts (44), which are arranged on a respective associated side area (28) of the roller bar (14) and in the vertical direction ( z) on a base surface (42) in such a way that there is a gap (47) between the base surface (42) and the rolled section (15, 16) facing the base surface (42).

2. Rolling tool unit according to claim 1, wherein the rolling rod (14) has a supporting projection (29) in each of the side regions (28), each supporting projection (29) having a first contact surface (30) and one in the vertical direction (z) at a distance to the first contact surface (30) arranged second contact surface (31) facing away from each other.

-25- Rolling tool unit according to claim 2, wherein each support part (44) has a counter-abutment surface (46) which faces away from the base surface (42) and against which the first abutment surface (30) or the second abutment surface (31) of the roller bar (14) bears. Rolling tool unit according to claim 3, wherein the maximum distance between the first rolled profile (15) and the first contact surface (30) defines a first height (hl) in the vertical direction (z), the maximum distance between the second rolled profile (16) and the second Abutment surface (31) defines a second height (h2) in the vertical direction (z), and wherein the distance between the base surface (42) and the counter-abutment surface (46) defines a third height (h3) in the vertical direction (z) that is greater than the first height (hl) and the second height (h2) . Rolling tool unit according to one of the preceding claims, wherein the support unit (17) has a base body (40) having the base surface (42). Rolling tool unit according to claim 5, wherein the base body (40) is formed by at least one base plate (41). Rolling tool unit according to claim 5 or 6, wherein the base body (40) is detachably connected to the support parts (44). A rolling tool assembly as claimed in any preceding claim, wherein the support members (44) are releasably connected to the rolling bar (14). A rolling tool assembly as claimed in any preceding claim, wherein each support member (44) is a support slat (45) having a rectangular cross-section. A rolling tool assembly as claimed in any preceding claim, wherein each support member (44) is a support slat (45) having a trapezoidal cross-section. Rolling tool unit according to one of the preceding claims, in which the support parts (44) are arranged in a transverse direction (y) at a distance from one another which is equal to or greater than the width of the first rolled section (15) and the second rolled section (16) in the transverse direction ( y) . Rolling tool unit according to one of the preceding claims, in which the rolled sections (15, 16) have a plurality of groups of teeth (21), tooth tip ends (23) of the teeth (21) of one group being arranged outside a plane (E) along which the tooth tip ends (23) of the teeth (21) of the other group are arranged. Method for finishing a rolling rod (14) of a rolling tool unit (13), wherein the rolling rod

(14) in a longitudinal direction (x) and a first rolled section (15) on a first side (19) and a second rolled section (16) on a second side arranged in a vertical direction (z) at a distance from the first side (19). (20), wherein the first rolled section

(15) and the second rolled section (16) facing away from each other, the rolling bar (14) having two side portions (28) connecting the first side (19) and the second side (20), and wherein the rolling tool unit (13) has a support unit (17), the two in

Support parts (44) extending in the longitudinal direction (x) parallel to one another and along the rolling rod (14), which are arranged on a respectively associated side area (28) of the rolling rod (14), and having a base body (40) with a base surface (42), the method comprising the following steps:

- removing the rolling tool unit (13) from a rolling machine,

- Remove the roller bar (14) from the support parts

(44) and removing the support parts from the base body (40),

- Post-processing of the rolled sections (15, 16),

- Replacing the base body (40) with a base body (40) with a greater thickness (d2, d3) in the vertical direction (z),

- Attaching the support parts (44) to the base body (40) and attaching the support parts (44) to the roller rod (14) so that there is a gap between the base surface (42) and the roller profile (15, 16) facing the base surface (42). (47) is present.

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