CA2772658A1 - Device and method for processing elongate workpieces without cutting - Google Patents
Device and method for processing elongate workpieces without cutting Download PDFInfo
- Publication number
- CA2772658A1 CA2772658A1 CA2772658A CA2772658A CA2772658A1 CA 2772658 A1 CA2772658 A1 CA 2772658A1 CA 2772658 A CA2772658 A CA 2772658A CA 2772658 A CA2772658 A CA 2772658A CA 2772658 A1 CA2772658 A1 CA 2772658A1
- Authority
- CA
- Canada
- Prior art keywords
- shaping
- workpiece
- rollers
- roller
- shaping roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/04—Making by means of profiled-rolls or die rolls
- B21H3/042—Thread-rolling heads
- B21H3/044—Thread-rolling heads working axially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Metal Rolling (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a device for processing elongate workpieces without cutting in order to produce a thread-like outer profile by means of at least one shaping roller arrangement (9, 10, 11) having shaping rollers (12, 13, 14), which can be rotated about respective axes (12', 13', 14'), wherein the shaping roller arrangement (9, 10, 11) surrounds the workpiece to be processed, wherein a feed motion between the shaping rollers (12, 13, 14) and the workpiece is established in the circumferential direction of the workpiece and axially to the workpiece, and wherein the shaping rollers (12, 13, 14) are brought into a shaping engagement with the workpiece in succession during a complete revolution around the workpiece, wherein at least two axially successive shaping roller arrangements (9, 10, 11) are provided in the passing direction (8) of the workpiece, wherein at least the shaping rollers (12, 13, 14) of a shaping roller arrangement (9, 10, 11) are the same as each other and, in order to provide shaping engagements with the workpiece that are successive in the direction of the revolution around the workpiece, the axial position of each shaping roller (12, 13, 14) within an axial installation dimension (28) is different. The invention further relates to a method for processing elongate workpieces without cutting by means of such a device.
Description
DEVICE AND METHOD FOR PROCESSING ELONGATE WORKPIECES
WITHOUT CUTTING
The invention relates to a device for processing elongate workpieces without cutting to produce a thread-like outer profile by means of at least one shaping roller arrangement having at least two shaping rollers that can be rotated about respective axes, wherein the shaping roller arrangement surrounds the workpiece to be processed, wherein a feed motion between the shaping rollers and the workpiece is established in the circumferential direction of the workpiece and axially to the workpiece, and wherein the shaping rollers are successively brought into a shaping engagement with the workpiece during a complete revolution around the workpiece, and a method for processing elongate workpieces without cutting to produce a thread-like outer profile by means of at least one such device, in which the workpiece to be processed is processed in its circumferential direction and axially by a feed motion into a roller head, wherein the shaping rollers are successively brought into a shaping engagement with the workpiece during a complete revolution around the workpiece.
The substantially continuous production of rock bolts, drill rods and other comparable products, departing from bar-shaped or tubular base bodies, by processing without cutting in a rolling process is, for instance, described in the document DE
43 13 918 A. The shaping tool used in that device comprises a roller head in which three shaping rollers profiled in their peripheral regions are mounted, whose axes extend at a respective angle to the axis of the base body to be externally shaped in a thread-like manner, while being uniformly distributed about the same. To perform the shaping process, the roller head is driven around its axis, which extends coaxially with the axis of the base body, such that the axial advance of the base body, which is held rotationally fast about its axis, will result from the angular adjustment of the shaping rollers.
The document DE 101 10 569 Al describes a comparable device, which uses a roller head that - viewed in the passing direction - includes several arrangements each comprised of at least three shaping rollers whose profiles differ from one another and which are adapted to the shaping process proceeding in said direction. Each of the shaping rollers has a ring-shaped, pitchless outer profile, wherein, by an angular adjustment relative to the axis of the non-rotationally held workpiece, an axial advance is made as a function of the rotation of the roller head about its central axis, which extends coaxially with the axis of the workpiece.
In the document DE 10 2007 029 548 B3, a roller head for use in such a device and, in particular, the mounting of the shaping rollers, are described. The roller head is comprised of an assembly of several axially spaced-apart bearing discs, which is rotationally mounted about a central axis and connected to a drive and between which discs an assembly of shaping rollers is each provided. The shaping rollers are mounted so as to be freely rotatable about their respective axes, which are each adjusted at an angle relative to the longitudinal axis of the bar-shaped or tubular workpiece to be processed. The workpiece extends coaxially with the central axis of the roller head through central openings of the bearing discs and is non-rotationally clamped on its two ends.
The profiles of the successive shaping roller assemblies differ slightly, thus accounting for the fact that the shaping rollers come into engagement with the workpiece one after the other. The mounting of the shaping rollers is realized by axle pins whose ends are fixedly disposed in the bearing discs. The shaping roller is supported on the axle pin by a central radial bearing and by axial bearings, via interposed spacer rings. The spacer rings provided on both sides have different axial dimensions so as to enable a change in the position of the shaping roller on the axle pin at an unchanged axial locating distance, merely by exchanging the entry-side and exit-side spacer rings such that, at a unilaterally occurring wear of the axle pin, the worn portion will come into a less highly stressed zone so as to provide an improved material exploitation of the axle pin.
The document DE 1 214 637 B describes a thread rolling head including freely rotatable thread rollers, each of which carries self-contained ring profiles and is inclined relative to the central axis of the roller head by the pitch angle, which corresponds to the pitch of the thread to be rolled.
In order to ensure, in those known roller heads, that at every shaping roller assembly a shaping engagement with the workpiece is provided such that the shaping rollers will come into engagement one after the other, viewed in the direction of revolution of the roller head, different shaping rollers that meet this criterion are used. These shaping rollers are, however, prone to considerable wear such that the operators of those devices have to keep on standby adequate numbers of different shaping rollers. The required stock of shaping rollers will thus increase as a function of the number of shaping rollers per shaping roller assembly and of the number of shaping roller assemblies per such device.
WITHOUT CUTTING
The invention relates to a device for processing elongate workpieces without cutting to produce a thread-like outer profile by means of at least one shaping roller arrangement having at least two shaping rollers that can be rotated about respective axes, wherein the shaping roller arrangement surrounds the workpiece to be processed, wherein a feed motion between the shaping rollers and the workpiece is established in the circumferential direction of the workpiece and axially to the workpiece, and wherein the shaping rollers are successively brought into a shaping engagement with the workpiece during a complete revolution around the workpiece, and a method for processing elongate workpieces without cutting to produce a thread-like outer profile by means of at least one such device, in which the workpiece to be processed is processed in its circumferential direction and axially by a feed motion into a roller head, wherein the shaping rollers are successively brought into a shaping engagement with the workpiece during a complete revolution around the workpiece.
The substantially continuous production of rock bolts, drill rods and other comparable products, departing from bar-shaped or tubular base bodies, by processing without cutting in a rolling process is, for instance, described in the document DE
43 13 918 A. The shaping tool used in that device comprises a roller head in which three shaping rollers profiled in their peripheral regions are mounted, whose axes extend at a respective angle to the axis of the base body to be externally shaped in a thread-like manner, while being uniformly distributed about the same. To perform the shaping process, the roller head is driven around its axis, which extends coaxially with the axis of the base body, such that the axial advance of the base body, which is held rotationally fast about its axis, will result from the angular adjustment of the shaping rollers.
The document DE 101 10 569 Al describes a comparable device, which uses a roller head that - viewed in the passing direction - includes several arrangements each comprised of at least three shaping rollers whose profiles differ from one another and which are adapted to the shaping process proceeding in said direction. Each of the shaping rollers has a ring-shaped, pitchless outer profile, wherein, by an angular adjustment relative to the axis of the non-rotationally held workpiece, an axial advance is made as a function of the rotation of the roller head about its central axis, which extends coaxially with the axis of the workpiece.
In the document DE 10 2007 029 548 B3, a roller head for use in such a device and, in particular, the mounting of the shaping rollers, are described. The roller head is comprised of an assembly of several axially spaced-apart bearing discs, which is rotationally mounted about a central axis and connected to a drive and between which discs an assembly of shaping rollers is each provided. The shaping rollers are mounted so as to be freely rotatable about their respective axes, which are each adjusted at an angle relative to the longitudinal axis of the bar-shaped or tubular workpiece to be processed. The workpiece extends coaxially with the central axis of the roller head through central openings of the bearing discs and is non-rotationally clamped on its two ends.
The profiles of the successive shaping roller assemblies differ slightly, thus accounting for the fact that the shaping rollers come into engagement with the workpiece one after the other. The mounting of the shaping rollers is realized by axle pins whose ends are fixedly disposed in the bearing discs. The shaping roller is supported on the axle pin by a central radial bearing and by axial bearings, via interposed spacer rings. The spacer rings provided on both sides have different axial dimensions so as to enable a change in the position of the shaping roller on the axle pin at an unchanged axial locating distance, merely by exchanging the entry-side and exit-side spacer rings such that, at a unilaterally occurring wear of the axle pin, the worn portion will come into a less highly stressed zone so as to provide an improved material exploitation of the axle pin.
The document DE 1 214 637 B describes a thread rolling head including freely rotatable thread rollers, each of which carries self-contained ring profiles and is inclined relative to the central axis of the roller head by the pitch angle, which corresponds to the pitch of the thread to be rolled.
In order to ensure, in those known roller heads, that at every shaping roller assembly a shaping engagement with the workpiece is provided such that the shaping rollers will come into engagement one after the other, viewed in the direction of revolution of the roller head, different shaping rollers that meet this criterion are used. These shaping rollers are, however, prone to considerable wear such that the operators of those devices have to keep on standby adequate numbers of different shaping rollers. The required stock of shaping rollers will thus increase as a function of the number of shaping rollers per shaping roller assembly and of the number of shaping roller assemblies per such device.
The invention aims to configure a device of the initially defined kind by simple means with a view to providing a more efficient operation of the same, on the one hand, and making the device adaptable to the most different workpiece wall thicknesses and diameters as well as threads and surface profiles to be formed, on the other hand.
To solve these objects, a device according to the invention is essentially characterized in that at least two axially successive shaping roller arrangements are provided in the passing direction of the workpiece, that at least the shaping rollers of a shaping roller arrangement are the same as one another, that the axial position of each shaping roller within an axial installation dimension is different in order to provide shaping engagements with the workpiece that are successive in the direction of the revolution around the workpiece, and that at least three shaping rollers are arranged in each shaping roller arrangement, and that the shaping rollers of a shaping roller arrangement are arranged to be offset relative to those of the adjacent shaping roller arrangement in the radial direction by a full circle divider corresponding to the number of shaping rollers. In that at least two axially successive shaping roller arrangements are provided, it has, on the one hand, become possible to process workpieces having different workpiece diameters and/or different wall thicknesses, for instance by providing a wall thickness and/or diameter reduction by means of the first set of shaping rollers and by forming a thread-like outer profile by means of the second set of shaping rollers. In that, in order to provide shaping engagements with the workpiece successively in the direction of the revolution around the workpiece, the axial position of each shaping roller within an axial installation dimension is, moreover, differently conceived as opposed to the known prior art, successive shaping engagements of shaping rollers that are consecutively arranged in the direction of revolution can be provided by varying the axial position of the shaping profile. This also means that for the operation of the shaping roller arrangement a single shaping profile that can be fixed in different axial positions will do, which results in a considerable reduction of different shaping profiles and shaping rollers provided therewith.
In that, furthermore, at least three shaping rollers are disposed in each shaping roller arrangement, a rapid and exact surface treatment or shaping treatment of the workpiece to be processed will be feasible, and in that, furthermore, the shaping rollers of mutually adjacent shaping roller arrangements are arranged to be offset by a full circle divider corresponding to the number of shaping rollers, particularly uniform processing of the surface of the workpiece to be processed will be feasible, whereby, due to the permanent engagement of the shaping rollers with the workpiece to be processed, also surface and/or structural changes of the workpiece to be processed will be additionally achieved by a heat treatment.
According to a preferred further development of the invention, the device is characterized in that the shaping roller arrangement is comprised of a roller head that is rotationally drivable about its central axis, which extends coaxially with the workpiece during processing, and in which the shaping rollers are freely rotatably mounted on axle pins. In that the individual shaping rollers are mounted to be freely rotatable about their respective axes, with the roller head being rotationally drivable about its axis as a structural unit, it has become possible to better control the formation of, and hence more precisely configure, the thread-like outer profile while, at the same time, increasing the processing speed.
Alternatively, it is also possible, as in correspondence with a further development of the invention, that in the context of a shaping roller arrangement also each shaping roller is directly drivable about its axis, or the shaping rollers of the shaping roller arrangement are rotationally drivably mounted.
In that, as in correspondence with a preferred further development of the invention, the axes of the shaping rollers are adjusted at a respective angle relative to a longitudinal axis of the workpiece, or the central axis of the shaping roller arrangement, it will, on the one hand, be possible to arbitrarily define the advance of the workpiece through the device and, on the other hand, in connection with e.g. a pitchless, groove-like shaping profile, the pitch measure of the thread-like formation to be introduced into the outer side of the workpiece will result from said angle. Similarly, the extent of the material taper or calibration of the introduced workpiece will be derived if, for instance, a plain shaping roller is applied. Such a configuration in a preferred manner enables tubes or pipes and rods with different diameters to be profiled, tapered and/or calibrated on one and the same device. A further improvement or precision enhancement will be achieved according to a preferred further development of the invention in that the adjustment angle is adjustable as a function of the dimensions of the workpiece and/or the material of the workpiece.
According to a preferred further development of the invention, the device, as a constructive concretization of the axial adjustability of a shaping profile of a shaping roller, is characterized in that the axle pins of the shaping rollers are non-rotationally fixed about their respective axes in the roller head. To this end, at least one adjusting disc is each located on either side of the shaping profile, whose two axial lengths together with the length of the shaping profile complete one another to said installation dimension. The two adjusting discs will thus generally have different axial dimensions as a function of the axial position of the shaping profile to be adjusted. This means that, as opposed to the initially mentioned prior art, only adjusting discs having different dimensions will have to be kept on standby besides one or a few standard shape(s) of a shaping profile in order to exchange worn parts if need be.
According to a further preferred structural configuration of a shaping roller and, in particular, its mounting within the roller head, the invention is characterized in that a fixed installation dimension of the shaping rollers is ensured by adjusting discs provided on both sides of a shaping profile of the shaping roller. In this case, the axle pin carrying the shaping roller is non-rotationally received in the roller head, wherein, in order to provide reference or abutment surfaces documenting said installation dimension, structural elements are used, which are present anyway, for instance structural elements that serve to fix the axle pins within the roller head, wherein the shaping profile of each shaping roller is preferably mounted radially on the axle pin in a central region, and axially on the two end-side end regions.
According to another preferred further development of the invention, the device is configured such that said installation dimension is provided by the axial distance of the reference surfaces of structural elements used to fix the axle pins in the roller head, and that an axial support of the shaping profile on said structural elements is provided via the adjusting disc. In that all of the functional elements intended to mount the shaping profile are included in the structure of the latter, it is possible to provide reproducible conditions such that the mutually opposite end faces of the shaping profile will always be usable as abutment surfaces for the adjusting discs, thus clearly reducing the wear of the device while, at the same time, increasing the processing precision.
In that, as in correspondence with a preferred further development of the device according to the invention, at least three shaping roller arrangements are provided in axial succession in the passing direction of a workpiece, it has become feasible to apply the whole shaping work stepwisely. In accordance with the invention it is possible, with the shaping operation progressing in the passing direction of the workpiece, that either the radial dimensions of the shaping rollers inserted in the shaping roller arrangements, yet not their profile shapes differ from one another, or that both the radial dimensions of the shaping rollers inserted in the shaping roller arrangements and their surfaces or surface structures differ from one another.
According to a preferred further development of the invention, the device is substantially configured such that at least three shaping rollers are arranged in each shaping roller arrangement, and that the shaping rollers of a shaping roller arrangement are arranged to be offset relative to those of the adjacent shaping roller arrangement in the radial direction by a full circle divider corresponding to the number of shaping rollers.
In that, as in correspondence with a preferred further development of the invention, the device is configured such that the shaping rollers of a shaping roller arrangement relative to those of the adjacent shaping roller arrangements comprise shaping profiles having mutually different profiles, it is feasible by one and the same arrangement to, for instance, coarsely process a workpiece to be processed in a first step and finely process, or finish, the same in a second step. Such a device is, of course, arbitrarily expandable such that even a plurality of processing steps can be performed.
In a further preferred modification of the invention, the device is configured in a manner that the shaping rollers of a shaping roller arrangement relative to those of the adjacent shaping roller arrangement have mutually different diameters.
By such a device it is, for instance, possible for a workpiece to be processed to reduce the wall thickness or the diameter of the workpiece in a first step, to coarsely apply a thread-like profile in a second step, and to finish the latter in a third step. By such a device it is, for instance, also possible to merely calibrate the workpiece to be processed in a first step, to form a thread pre-profile in a second step, and to correctly form or post-process said thread in a third step.
Such a configuration, in particular, enables an increase in the throughput and renders feasible the adaptability of one and the same device to different workpiece cross-sections or diameters without having to keep on stock a multitude of different shaping rollers.
In that, as in correspondence with a further development of the invention, the device is configured such that an intake region into the shaping roller arrangement for the workpiece is designed as an adjustable cone, one and the same roller head can be used for different material cross-sections, and such a configuration will, furthermore, ensure a rapid and reliable introduction of the workpiece into the shaping roller arrangement while simultaneously processing the end region of the workpiece, e.g. by reducing its diameter or wall thickness.
In that, as in correspondence with a further preferred configuration of the present configuration of the invention, the device is configured such that the shaping rollers of each shaping roller arrangement can be arranged on arbitrarily selectable and mutually different pitch circles, it is possible to further reduce the number of shaping rollers to be kept on stock, since partially worn shaping rollers can, for instance, be disposed on a smaller pitch circle and subsequently further used until they are ultimately worn.
The present invention can, moreover, be performed by a method for non-cuttingly shaping elongate workpieces using a device of the present invention, by which method surface refining of the workpiece to be processed will be additionally achieved while forming a thread-like outer profile.
To this end, at least two shaping roller arrangements in axial succession are brought into engagement with the workpiece in the passing direction of the workpiece and, in order to provide successive shaping engagements with the workpiece in the direction of the revolution around the workpiece, the axial position of each shaping rollers is differently adapted within an axial installation dimension. In that, in the passing direction of the workpiece, at least two successive shaping roller arrangements are brought into engagement with the workpiece, it is feasible during processing of the workpiece to achieve a considerable temperature development, in particular in the successive shaping engagements with the workpiece, such that simultaneously with the surface processing or change in the diameter or change in the wall thickness of the workpiece hot-forming of the worked end region of the elongate workpiece to be processed is achieved, which causes the end region in relation to the remaining elongate workpiece to be subjected to a hardening treatment by a structural change of the material, thus increasing the service lives of the devices produced by the method according to the invention. With such a method control, workpieces having smaller wall thickness will, moreover, do such that the required amount of raw material can also be reduced.
In that, as in correspondence with a further development of the method, the latter is conducted in a manner that the shaping roller arrangement is driven to a rotational movement by a roller head rotating about its central axis, which extends coaxially with the workpiece during processing, wherein the shaping rollers are freely rotationally mounted on axle pins in the shaping roller arrangement, the wear of the shaping rollers in the shaping roller arrangement will be minimized so as to clearly reduce the stock inventory of shaping rollers, on the one hand, and readily and reliably enable the quick adaptability of the method to different materials, material conditions and processing times, on the other hand.
In that, in said method, it is proceeded in a manner that the shaping rollers of a shaping roller arrangement comprise shaping profiles having different profilings relative to those of the adjacent shaping roller arrangement, or that the shaping rollers of a shaping roller arrangement comprise shaping rollers having different diameters relative to those of the adjacent shaping roller arrangement, it is feasible to use the method according to the invention for calibrating a workpiece or processing workpieces having different diameters or different wall thicknesses, without the shaping rollers being exchanged or excessively stressed and prematurely worn.
At the same time, such a method enables a structural change of the material structure in the worked end region of the workpiece so as to further increase the service lives of the processed workpieces.
In the following, the invention will be explained in more detail by way of exemplary embodiments illustrated in the drawing. Therein:
Fig. 1 is a side view of a roller head according to the invention;
Fig. 2 is a view of a shaping roller as part of the roller head according to Fig. 1 in an enlarged partial illustration;
Fig. 3 is an explosive view of a single shaping roller of the roller head according to Fig. 1;
Fig. 4 is a side view of a roller head according to the invention with two shaping rollers;
Fig. 5 is a top view on the end face of the roller head according to Fig. 4; and Fig. 6 is a side view of a modified embodiment of a roller head according to the invention, in which three shaping rollers are provided.
In Fig. 1, four identical, circular bearing discs extending in parallel and coaxially with one another are denoted by 1, 2, 3, 4, said bearing discs being held in their shown mounting positions at mutually uniform distances by the aid of spacers 5. The spacers 5 are uniformly distributed about the peripheries of the bearing discs 5 and can be screwed with the same.
The thus designed roller head 6 is intended to be mounted in a machine frame, which is not illustrated in the drawing, and rotationally drivable in the same about its axis 7.
All of the bearing discs 1 to 4 are provided in a central region with registering, circular recesses extending coaxially with the axis 7, through which the elongate rod-shaped or tubular workpiece to be processed in its peripheral region for the purpose of producing a thread-like formation, which is not illustrated in the drawing, extends during the operational use of the roller head 6. The workpiece, which is held coaxially with the axis 7, in a manner known per se is non-rotational about is axis while being processed by the aid of the roller head 6, yet is mounted to be movable in the direction of its axis, for instance by the aid of a hydraulic carriage.
The illustrated roller head 6 is characterized by three shaping roller arrangements or assemblies 9, 10, 11, which are successively arranged in the passing direction 6 of the workpiece and each comprise three shaping rollers 12, 13, 14 that are disposed in a uniformly distributed manner in the peripheral direction and of which only one is shown in Fig. 1 for the sake of drawing simplicity.
The shaping rollers 12, 13, 14, i.e. their annular-cylindrical shaping profiles 12", 13", 14", are mounted to be freely rotatable about their respective axes 12', 13', 14', which axes are adjusted at a respective angle relative to the axis 7 of the roller head 6. This angular adjustment in connection with the rotational movement of the roller head 6 and the non-rotational, yet axially displaceable reception of the workpiece provides the pitch measure of the thread-like formation and the axial advance acting on the same during operation.
The shaping rollers 12, 13, 14 of each shaping roller assembly 9, 10, 11 differ in terms of their positioning on the respective axle, said positioning being adapted as a function of the direction of revolution of the roller head 6 to the effect that the peripherally successive shaping rollers 12, 13, 14 of a shaping roller assembly 9, 10, 11 will enter into engagement with the workpiece one after the other.
The shaping rollers 12, 13, 14 of the successive shaping roller assemblies 9, 10, 11 differ in terms of their radial dimensions to the effect that these will increase as a function of the shaping progressing in the passing direction 8.
Fig. 1 only exemplarily depicts three shaping roller assemblies. In practice, a roller head can also be comprised of two or more than three shaping roller assemblies succeeding one another in a passing direction.
To elucidate the mounting of the individual shaping rollers of a shaping roller assembly, it is in the following additionally referred to Figs. 2 and 3, in which identical functional elements are equally referenced.
Figs. 2 and 3 illustrate the shaping profile 12" of the shaping roller 12 as an annular-cylindrical base body externally comprising a profile in the form of an array of pitchless rings, which is provided with identically dimensioned turned grooves 15 on both of its end sides. This annular profile is intended for the production of an at least approximated round thread on the workpiece and should only be regarded as an example. Other thread-like formations can be similarly produced by an appropriate shaping roller profile.
By 16, a radial bearing, e.g. a cylindrical roller bearing, or a system of locating pins is denoted, via which the shaping profile 12" is radially supported on an axle pin 17.
By 18, spacer discs are denoted, via which the shaping profile 12" is supported on both sides on an axial bearing 19, one spacer disc 18 and one axial bearing 19 each filling a turned groove in an axially flush manner.
By 20, 21, sleeves are denoted, which are intended to be non-rotationally inserted into bores 22, 23 of two axially opposite bearing discs 1, 2, said bores extending in the direction of the axis 12' of the shaping roller 12 in its installed state. The identically dimensioned end portions 24, of the axle pins 17 can be inserted and non-rotationally fixed in said sleeves 20, 21. This rotationally fast fixation can, for instance, be positively realized by groove-and-tongue engagements.
By 26, 27, two adjusting discs are finally denoted, via which the two axial bearings 19 are axially supported on the facing end faces of the sleeves 20 and 21, respectively. The axial installation dimension 28 between the mutually facing end sides of the sleeves 20, 21 is identical for all three installation positions of the shaping roller assembly 9. It is preferably also identical for all installation positions of the roller head 6.
In accordance with the invention, the adjusting discs 26, 27 on both sides of a shaping roller 12 are selected with the proviso that, while maintaining the installation dimension 28, the axial positions of the shaping profiles 12", 13", 14" of the shaping rollers 12, 13, 14 of the shaping roller assembly 9, 10, 11, respectively, on the respective axle pins 17 are differently conceived with a view to bringing the shaping profiles 12", 13", 14", which are successively arranged in the direction of revolution of the roller head 6 within a shaping roller assembly 9, 10, 11, one after the other into engagement with the workpiece during a processing operation. This will only require appropriate pairs or combinations of adjusting discs 26, 27 to be available on standby, which, in combination with the axial dimensions of the shaping rollers, are suitable for constituting the installation dimension 28.
Identical shaping rollers can thus be used for any installation position of at least one shaping roller assembly 9 irrespectively of their concrete installation position.
In the illustration according to Fig. 4, in which the reference numerals of the preceding Figures have been retained, three bearing discs 1, 2 and 3 are shown, which are connected to one another, and held at equal distances, by spacers 5. In a thus designed roller head 6, a workpiece to be processed will be supplied along the axis 7, and the shaping rollers 11 disposed in the shaping roller assembly 9, of which three are provided in Fig. 4 and which have shaping profiles 12' formed on their surfaces, will be brought into engagement with said workpiece supplied along the axis 7. They will perform a first, coarse profiling step or first coarse step for forming a thread-like surface. As the workpiece is moved on in the direction of the axis 7, the pre-processed workpiece will reach the second roller assembly 10, in which final processing or post-processing of the thread-like surface profile of the workpiece will be carried out.
Such an arrangement, in particular with the shaping rollers 12 mounted in the manner described in the preceding Figures, not only allows for the non-cutting shaping of a workpiece and, in particular, the application of a thread-like structure, but at the same time enables the processed end region of the workpiece to be subjected to heat-refining due to the high temperature forming during the processing procedure, so that a workpiece that is subjected to such a processing operation is simultaneously refined in its end region, thus having a higher lifetime or service life than conventional workpieces.
It goes without saying that the profiles of the rollers 11 may be configured identically with, or differently from, one another in the individual shaping roller assemblies 9, 10, whereby the stock of shaping rollers can be kept extremely low, in particular, due to the fact that with a slightly worn surface contour of one of the shaping rollers 12, the latter can be immediately installed and used in a device comprising a smaller pitch circle.
It is possible to use both shaping rollers 12 with accordingly coarse or fine profiles and shaping rollers having smooth surfaces, by which, for instance, a change in the diameter, a reduction of the wall thickness, or the like, of a workpiece to be processed can be achieved prior to applying a thread.
Fig. 5 depicts the device of Fig. 4, viewed in the direction of the axis 7, the respective axial bearings 19 of the shaping rollers 12 in this Figure being denoted by A, B and C. The bearings for the spacers 5 are also schematically indicated.
At the same time, it is apparent from Fig. 5 that the shaping rollers 12 of the first shaping roller assembly 9 are arranged to be offset relative to those of the second shaping roller assembly 10 by a full circle divider corresponding to the number of shaping rollers 12, so that, in particular, uniform and quick processing as well as an accelerated throughput of the workpiece to be processed through the roller head 6 will be enabled.
The illustration according to Fig. 6 substantially corresponds to that of Fig. 4 such that it is referred to Fig. 4 concerning the description of the first two shaping roller assemblies 9, 10 of this Figure.
The shaping roller assembly 11 in this case is configured such that instead of the individual shaping rollers 12 only their axle pins 17 are illustrated, so that the device according to Fig. 6 can be adapted for use in a third processing step for elongate workpieces to be non-cuttingly processed, for instance by providing further shaping rollers 12 on the axle pins 17 of the shaping rollers assembly 11.
In addition, a drive 29 for the roller head 6 is schematically indicated in Fig. 6.
There is no need to point out that the device according to the present invention can be expanded in any manner whatsoever, and that also more than three shaping roller assemblies can be provided as a function of the processing steps to be performed.
In case of wear, the shaping profiles of a shaping roller assembly, based on the absolute dimensions, can be exchanged with those of a shaping roller assembly arranged upstream in the passing direction in order to achieve an improved material exploitation. In this case, the simple axial adjustability of the shaping profile on the respectively supporting axle pin is beneficial.
To solve these objects, a device according to the invention is essentially characterized in that at least two axially successive shaping roller arrangements are provided in the passing direction of the workpiece, that at least the shaping rollers of a shaping roller arrangement are the same as one another, that the axial position of each shaping roller within an axial installation dimension is different in order to provide shaping engagements with the workpiece that are successive in the direction of the revolution around the workpiece, and that at least three shaping rollers are arranged in each shaping roller arrangement, and that the shaping rollers of a shaping roller arrangement are arranged to be offset relative to those of the adjacent shaping roller arrangement in the radial direction by a full circle divider corresponding to the number of shaping rollers. In that at least two axially successive shaping roller arrangements are provided, it has, on the one hand, become possible to process workpieces having different workpiece diameters and/or different wall thicknesses, for instance by providing a wall thickness and/or diameter reduction by means of the first set of shaping rollers and by forming a thread-like outer profile by means of the second set of shaping rollers. In that, in order to provide shaping engagements with the workpiece successively in the direction of the revolution around the workpiece, the axial position of each shaping roller within an axial installation dimension is, moreover, differently conceived as opposed to the known prior art, successive shaping engagements of shaping rollers that are consecutively arranged in the direction of revolution can be provided by varying the axial position of the shaping profile. This also means that for the operation of the shaping roller arrangement a single shaping profile that can be fixed in different axial positions will do, which results in a considerable reduction of different shaping profiles and shaping rollers provided therewith.
In that, furthermore, at least three shaping rollers are disposed in each shaping roller arrangement, a rapid and exact surface treatment or shaping treatment of the workpiece to be processed will be feasible, and in that, furthermore, the shaping rollers of mutually adjacent shaping roller arrangements are arranged to be offset by a full circle divider corresponding to the number of shaping rollers, particularly uniform processing of the surface of the workpiece to be processed will be feasible, whereby, due to the permanent engagement of the shaping rollers with the workpiece to be processed, also surface and/or structural changes of the workpiece to be processed will be additionally achieved by a heat treatment.
According to a preferred further development of the invention, the device is characterized in that the shaping roller arrangement is comprised of a roller head that is rotationally drivable about its central axis, which extends coaxially with the workpiece during processing, and in which the shaping rollers are freely rotatably mounted on axle pins. In that the individual shaping rollers are mounted to be freely rotatable about their respective axes, with the roller head being rotationally drivable about its axis as a structural unit, it has become possible to better control the formation of, and hence more precisely configure, the thread-like outer profile while, at the same time, increasing the processing speed.
Alternatively, it is also possible, as in correspondence with a further development of the invention, that in the context of a shaping roller arrangement also each shaping roller is directly drivable about its axis, or the shaping rollers of the shaping roller arrangement are rotationally drivably mounted.
In that, as in correspondence with a preferred further development of the invention, the axes of the shaping rollers are adjusted at a respective angle relative to a longitudinal axis of the workpiece, or the central axis of the shaping roller arrangement, it will, on the one hand, be possible to arbitrarily define the advance of the workpiece through the device and, on the other hand, in connection with e.g. a pitchless, groove-like shaping profile, the pitch measure of the thread-like formation to be introduced into the outer side of the workpiece will result from said angle. Similarly, the extent of the material taper or calibration of the introduced workpiece will be derived if, for instance, a plain shaping roller is applied. Such a configuration in a preferred manner enables tubes or pipes and rods with different diameters to be profiled, tapered and/or calibrated on one and the same device. A further improvement or precision enhancement will be achieved according to a preferred further development of the invention in that the adjustment angle is adjustable as a function of the dimensions of the workpiece and/or the material of the workpiece.
According to a preferred further development of the invention, the device, as a constructive concretization of the axial adjustability of a shaping profile of a shaping roller, is characterized in that the axle pins of the shaping rollers are non-rotationally fixed about their respective axes in the roller head. To this end, at least one adjusting disc is each located on either side of the shaping profile, whose two axial lengths together with the length of the shaping profile complete one another to said installation dimension. The two adjusting discs will thus generally have different axial dimensions as a function of the axial position of the shaping profile to be adjusted. This means that, as opposed to the initially mentioned prior art, only adjusting discs having different dimensions will have to be kept on standby besides one or a few standard shape(s) of a shaping profile in order to exchange worn parts if need be.
According to a further preferred structural configuration of a shaping roller and, in particular, its mounting within the roller head, the invention is characterized in that a fixed installation dimension of the shaping rollers is ensured by adjusting discs provided on both sides of a shaping profile of the shaping roller. In this case, the axle pin carrying the shaping roller is non-rotationally received in the roller head, wherein, in order to provide reference or abutment surfaces documenting said installation dimension, structural elements are used, which are present anyway, for instance structural elements that serve to fix the axle pins within the roller head, wherein the shaping profile of each shaping roller is preferably mounted radially on the axle pin in a central region, and axially on the two end-side end regions.
According to another preferred further development of the invention, the device is configured such that said installation dimension is provided by the axial distance of the reference surfaces of structural elements used to fix the axle pins in the roller head, and that an axial support of the shaping profile on said structural elements is provided via the adjusting disc. In that all of the functional elements intended to mount the shaping profile are included in the structure of the latter, it is possible to provide reproducible conditions such that the mutually opposite end faces of the shaping profile will always be usable as abutment surfaces for the adjusting discs, thus clearly reducing the wear of the device while, at the same time, increasing the processing precision.
In that, as in correspondence with a preferred further development of the device according to the invention, at least three shaping roller arrangements are provided in axial succession in the passing direction of a workpiece, it has become feasible to apply the whole shaping work stepwisely. In accordance with the invention it is possible, with the shaping operation progressing in the passing direction of the workpiece, that either the radial dimensions of the shaping rollers inserted in the shaping roller arrangements, yet not their profile shapes differ from one another, or that both the radial dimensions of the shaping rollers inserted in the shaping roller arrangements and their surfaces or surface structures differ from one another.
According to a preferred further development of the invention, the device is substantially configured such that at least three shaping rollers are arranged in each shaping roller arrangement, and that the shaping rollers of a shaping roller arrangement are arranged to be offset relative to those of the adjacent shaping roller arrangement in the radial direction by a full circle divider corresponding to the number of shaping rollers.
In that, as in correspondence with a preferred further development of the invention, the device is configured such that the shaping rollers of a shaping roller arrangement relative to those of the adjacent shaping roller arrangements comprise shaping profiles having mutually different profiles, it is feasible by one and the same arrangement to, for instance, coarsely process a workpiece to be processed in a first step and finely process, or finish, the same in a second step. Such a device is, of course, arbitrarily expandable such that even a plurality of processing steps can be performed.
In a further preferred modification of the invention, the device is configured in a manner that the shaping rollers of a shaping roller arrangement relative to those of the adjacent shaping roller arrangement have mutually different diameters.
By such a device it is, for instance, possible for a workpiece to be processed to reduce the wall thickness or the diameter of the workpiece in a first step, to coarsely apply a thread-like profile in a second step, and to finish the latter in a third step. By such a device it is, for instance, also possible to merely calibrate the workpiece to be processed in a first step, to form a thread pre-profile in a second step, and to correctly form or post-process said thread in a third step.
Such a configuration, in particular, enables an increase in the throughput and renders feasible the adaptability of one and the same device to different workpiece cross-sections or diameters without having to keep on stock a multitude of different shaping rollers.
In that, as in correspondence with a further development of the invention, the device is configured such that an intake region into the shaping roller arrangement for the workpiece is designed as an adjustable cone, one and the same roller head can be used for different material cross-sections, and such a configuration will, furthermore, ensure a rapid and reliable introduction of the workpiece into the shaping roller arrangement while simultaneously processing the end region of the workpiece, e.g. by reducing its diameter or wall thickness.
In that, as in correspondence with a further preferred configuration of the present configuration of the invention, the device is configured such that the shaping rollers of each shaping roller arrangement can be arranged on arbitrarily selectable and mutually different pitch circles, it is possible to further reduce the number of shaping rollers to be kept on stock, since partially worn shaping rollers can, for instance, be disposed on a smaller pitch circle and subsequently further used until they are ultimately worn.
The present invention can, moreover, be performed by a method for non-cuttingly shaping elongate workpieces using a device of the present invention, by which method surface refining of the workpiece to be processed will be additionally achieved while forming a thread-like outer profile.
To this end, at least two shaping roller arrangements in axial succession are brought into engagement with the workpiece in the passing direction of the workpiece and, in order to provide successive shaping engagements with the workpiece in the direction of the revolution around the workpiece, the axial position of each shaping rollers is differently adapted within an axial installation dimension. In that, in the passing direction of the workpiece, at least two successive shaping roller arrangements are brought into engagement with the workpiece, it is feasible during processing of the workpiece to achieve a considerable temperature development, in particular in the successive shaping engagements with the workpiece, such that simultaneously with the surface processing or change in the diameter or change in the wall thickness of the workpiece hot-forming of the worked end region of the elongate workpiece to be processed is achieved, which causes the end region in relation to the remaining elongate workpiece to be subjected to a hardening treatment by a structural change of the material, thus increasing the service lives of the devices produced by the method according to the invention. With such a method control, workpieces having smaller wall thickness will, moreover, do such that the required amount of raw material can also be reduced.
In that, as in correspondence with a further development of the method, the latter is conducted in a manner that the shaping roller arrangement is driven to a rotational movement by a roller head rotating about its central axis, which extends coaxially with the workpiece during processing, wherein the shaping rollers are freely rotationally mounted on axle pins in the shaping roller arrangement, the wear of the shaping rollers in the shaping roller arrangement will be minimized so as to clearly reduce the stock inventory of shaping rollers, on the one hand, and readily and reliably enable the quick adaptability of the method to different materials, material conditions and processing times, on the other hand.
In that, in said method, it is proceeded in a manner that the shaping rollers of a shaping roller arrangement comprise shaping profiles having different profilings relative to those of the adjacent shaping roller arrangement, or that the shaping rollers of a shaping roller arrangement comprise shaping rollers having different diameters relative to those of the adjacent shaping roller arrangement, it is feasible to use the method according to the invention for calibrating a workpiece or processing workpieces having different diameters or different wall thicknesses, without the shaping rollers being exchanged or excessively stressed and prematurely worn.
At the same time, such a method enables a structural change of the material structure in the worked end region of the workpiece so as to further increase the service lives of the processed workpieces.
In the following, the invention will be explained in more detail by way of exemplary embodiments illustrated in the drawing. Therein:
Fig. 1 is a side view of a roller head according to the invention;
Fig. 2 is a view of a shaping roller as part of the roller head according to Fig. 1 in an enlarged partial illustration;
Fig. 3 is an explosive view of a single shaping roller of the roller head according to Fig. 1;
Fig. 4 is a side view of a roller head according to the invention with two shaping rollers;
Fig. 5 is a top view on the end face of the roller head according to Fig. 4; and Fig. 6 is a side view of a modified embodiment of a roller head according to the invention, in which three shaping rollers are provided.
In Fig. 1, four identical, circular bearing discs extending in parallel and coaxially with one another are denoted by 1, 2, 3, 4, said bearing discs being held in their shown mounting positions at mutually uniform distances by the aid of spacers 5. The spacers 5 are uniformly distributed about the peripheries of the bearing discs 5 and can be screwed with the same.
The thus designed roller head 6 is intended to be mounted in a machine frame, which is not illustrated in the drawing, and rotationally drivable in the same about its axis 7.
All of the bearing discs 1 to 4 are provided in a central region with registering, circular recesses extending coaxially with the axis 7, through which the elongate rod-shaped or tubular workpiece to be processed in its peripheral region for the purpose of producing a thread-like formation, which is not illustrated in the drawing, extends during the operational use of the roller head 6. The workpiece, which is held coaxially with the axis 7, in a manner known per se is non-rotational about is axis while being processed by the aid of the roller head 6, yet is mounted to be movable in the direction of its axis, for instance by the aid of a hydraulic carriage.
The illustrated roller head 6 is characterized by three shaping roller arrangements or assemblies 9, 10, 11, which are successively arranged in the passing direction 6 of the workpiece and each comprise three shaping rollers 12, 13, 14 that are disposed in a uniformly distributed manner in the peripheral direction and of which only one is shown in Fig. 1 for the sake of drawing simplicity.
The shaping rollers 12, 13, 14, i.e. their annular-cylindrical shaping profiles 12", 13", 14", are mounted to be freely rotatable about their respective axes 12', 13', 14', which axes are adjusted at a respective angle relative to the axis 7 of the roller head 6. This angular adjustment in connection with the rotational movement of the roller head 6 and the non-rotational, yet axially displaceable reception of the workpiece provides the pitch measure of the thread-like formation and the axial advance acting on the same during operation.
The shaping rollers 12, 13, 14 of each shaping roller assembly 9, 10, 11 differ in terms of their positioning on the respective axle, said positioning being adapted as a function of the direction of revolution of the roller head 6 to the effect that the peripherally successive shaping rollers 12, 13, 14 of a shaping roller assembly 9, 10, 11 will enter into engagement with the workpiece one after the other.
The shaping rollers 12, 13, 14 of the successive shaping roller assemblies 9, 10, 11 differ in terms of their radial dimensions to the effect that these will increase as a function of the shaping progressing in the passing direction 8.
Fig. 1 only exemplarily depicts three shaping roller assemblies. In practice, a roller head can also be comprised of two or more than three shaping roller assemblies succeeding one another in a passing direction.
To elucidate the mounting of the individual shaping rollers of a shaping roller assembly, it is in the following additionally referred to Figs. 2 and 3, in which identical functional elements are equally referenced.
Figs. 2 and 3 illustrate the shaping profile 12" of the shaping roller 12 as an annular-cylindrical base body externally comprising a profile in the form of an array of pitchless rings, which is provided with identically dimensioned turned grooves 15 on both of its end sides. This annular profile is intended for the production of an at least approximated round thread on the workpiece and should only be regarded as an example. Other thread-like formations can be similarly produced by an appropriate shaping roller profile.
By 16, a radial bearing, e.g. a cylindrical roller bearing, or a system of locating pins is denoted, via which the shaping profile 12" is radially supported on an axle pin 17.
By 18, spacer discs are denoted, via which the shaping profile 12" is supported on both sides on an axial bearing 19, one spacer disc 18 and one axial bearing 19 each filling a turned groove in an axially flush manner.
By 20, 21, sleeves are denoted, which are intended to be non-rotationally inserted into bores 22, 23 of two axially opposite bearing discs 1, 2, said bores extending in the direction of the axis 12' of the shaping roller 12 in its installed state. The identically dimensioned end portions 24, of the axle pins 17 can be inserted and non-rotationally fixed in said sleeves 20, 21. This rotationally fast fixation can, for instance, be positively realized by groove-and-tongue engagements.
By 26, 27, two adjusting discs are finally denoted, via which the two axial bearings 19 are axially supported on the facing end faces of the sleeves 20 and 21, respectively. The axial installation dimension 28 between the mutually facing end sides of the sleeves 20, 21 is identical for all three installation positions of the shaping roller assembly 9. It is preferably also identical for all installation positions of the roller head 6.
In accordance with the invention, the adjusting discs 26, 27 on both sides of a shaping roller 12 are selected with the proviso that, while maintaining the installation dimension 28, the axial positions of the shaping profiles 12", 13", 14" of the shaping rollers 12, 13, 14 of the shaping roller assembly 9, 10, 11, respectively, on the respective axle pins 17 are differently conceived with a view to bringing the shaping profiles 12", 13", 14", which are successively arranged in the direction of revolution of the roller head 6 within a shaping roller assembly 9, 10, 11, one after the other into engagement with the workpiece during a processing operation. This will only require appropriate pairs or combinations of adjusting discs 26, 27 to be available on standby, which, in combination with the axial dimensions of the shaping rollers, are suitable for constituting the installation dimension 28.
Identical shaping rollers can thus be used for any installation position of at least one shaping roller assembly 9 irrespectively of their concrete installation position.
In the illustration according to Fig. 4, in which the reference numerals of the preceding Figures have been retained, three bearing discs 1, 2 and 3 are shown, which are connected to one another, and held at equal distances, by spacers 5. In a thus designed roller head 6, a workpiece to be processed will be supplied along the axis 7, and the shaping rollers 11 disposed in the shaping roller assembly 9, of which three are provided in Fig. 4 and which have shaping profiles 12' formed on their surfaces, will be brought into engagement with said workpiece supplied along the axis 7. They will perform a first, coarse profiling step or first coarse step for forming a thread-like surface. As the workpiece is moved on in the direction of the axis 7, the pre-processed workpiece will reach the second roller assembly 10, in which final processing or post-processing of the thread-like surface profile of the workpiece will be carried out.
Such an arrangement, in particular with the shaping rollers 12 mounted in the manner described in the preceding Figures, not only allows for the non-cutting shaping of a workpiece and, in particular, the application of a thread-like structure, but at the same time enables the processed end region of the workpiece to be subjected to heat-refining due to the high temperature forming during the processing procedure, so that a workpiece that is subjected to such a processing operation is simultaneously refined in its end region, thus having a higher lifetime or service life than conventional workpieces.
It goes without saying that the profiles of the rollers 11 may be configured identically with, or differently from, one another in the individual shaping roller assemblies 9, 10, whereby the stock of shaping rollers can be kept extremely low, in particular, due to the fact that with a slightly worn surface contour of one of the shaping rollers 12, the latter can be immediately installed and used in a device comprising a smaller pitch circle.
It is possible to use both shaping rollers 12 with accordingly coarse or fine profiles and shaping rollers having smooth surfaces, by which, for instance, a change in the diameter, a reduction of the wall thickness, or the like, of a workpiece to be processed can be achieved prior to applying a thread.
Fig. 5 depicts the device of Fig. 4, viewed in the direction of the axis 7, the respective axial bearings 19 of the shaping rollers 12 in this Figure being denoted by A, B and C. The bearings for the spacers 5 are also schematically indicated.
At the same time, it is apparent from Fig. 5 that the shaping rollers 12 of the first shaping roller assembly 9 are arranged to be offset relative to those of the second shaping roller assembly 10 by a full circle divider corresponding to the number of shaping rollers 12, so that, in particular, uniform and quick processing as well as an accelerated throughput of the workpiece to be processed through the roller head 6 will be enabled.
The illustration according to Fig. 6 substantially corresponds to that of Fig. 4 such that it is referred to Fig. 4 concerning the description of the first two shaping roller assemblies 9, 10 of this Figure.
The shaping roller assembly 11 in this case is configured such that instead of the individual shaping rollers 12 only their axle pins 17 are illustrated, so that the device according to Fig. 6 can be adapted for use in a third processing step for elongate workpieces to be non-cuttingly processed, for instance by providing further shaping rollers 12 on the axle pins 17 of the shaping rollers assembly 11.
In addition, a drive 29 for the roller head 6 is schematically indicated in Fig. 6.
There is no need to point out that the device according to the present invention can be expanded in any manner whatsoever, and that also more than three shaping roller assemblies can be provided as a function of the processing steps to be performed.
In case of wear, the shaping profiles of a shaping roller assembly, based on the absolute dimensions, can be exchanged with those of a shaping roller assembly arranged upstream in the passing direction in order to achieve an improved material exploitation. In this case, the simple axial adjustability of the shaping profile on the respectively supporting axle pin is beneficial.
Claims (10)
1. A device for processing elongate workpieces without cutting to produce a thread-like outer profile by means of at least one shaping roller arrangement (9, 10, 11) having at least two shaping rollers (12, 13, 14) that can be rotated about respective axes (12', 13', 14'), wherein the shaping roller arrangement (9, 10, 11) surrounds the workpiece to be processed, wherein a feed motion between the shaping rollers (12, 13, 14) and the workpiece is established in the circumferential direction of the workpiece and axially to the workpiece, and wherein the shaping rollers (12, 13, 14) are successively brought into a shaping engagement with the workpiece during a complete revolution around the workpiece, characterized in that at least two axially successive shaping roller arrangements (9, 10, 11) are provided in the passing direction (8) of the workpiece, that at least the shaping rollers (12, 13, 14) of a shaping roller arrangement (9, 10, 11) are the same as one another, that the axial position of each shaping roller (12, 13, 14) within an axial installation dimension (28) is different in order to provide shaping engagements with the workpiece that are successive in the direction of the revolution around the workpiece, and that at least three shaping rollers (12, 13, 14) are arranged in each shaping roller arrangement (9, 10, 11), and that the shaping rollers (12, 13, 14) of a shaping roller arrangement (9, 10, 11) are arranged to be offset relative to those of the adjacent shaping roller arrangement (9, 10, 11) in the radial direction by a full circle divider corresponding to the number of shaping rollers.
2. A device according to claim 1, characterized in that the shaping roller arrangement (9, 10, 11) is comprised of a roller head (6) that is rotationally drivable about its central axis (7), which extends coaxially with the workpiece during processing, and in which the shaping rollers (12, 13, 14) are freely rotatably mounted on axle pins (17).
3. A device according to claim 1, characterized in that the shaping rollers (12, 13, 14) of the shaping roller arrangement (9, 10, 11) are rotationally drivably mounted.
4. A device according to any one of claims 1, 2 or 3, characterized in that the axes (12', 13', 14') of the shaping rollers (12, 13, 14) are adjusted at a respective angle relative to a longitudinal axis of the workpiece, or the central axis (7) of the shaping roller arrangement (9, 10, 11).
5. A device according to claim 4, characterized in that the adjustment angle of the shaping rollers (12, 13, 14) is adjustable as a function of the dimensions of the workpiece and/or the material of the workpiece.
6. A device according to any one of claim 1, 2 or 4 and 5, characterized in that said axle pins (17) are non-rotationally fixed about their respective axes (12', 13', 14') in the roller head (6).
7. A device according to any one of claim 1 to 6, characterized in that a fixed installation dimension (28) of the shaping rollers (12, 13, 14) is ensured by adjusting discs (26, 27) provided on both sides of a shaping profile (12", 13", 14") of the shaping roller (12, 13, 14).
8. A device according to any one of claims 2 or 4 to 7, characterized in that the shaping profile (12", 13", 14") of each shaping roller (12, 13, 14) is mounted radially on the axle pin (17) in a central region, and axially on the two end-side end regions.
9. A device according to any one of claims 6, 7 or 8, characterized in that said installation dimension (28) is provided by the axial distance of the reference surfaces of structural elements used to fix the axle pins (17) in the roller head (6), and that an axial support of the shaping profile on said structural elements is provided via the adjusting disc (26, 27).
10. A device according to any one of claim 1 to 9, characterized by at least three shaping roller arrangements (9, 10, 11) provided in axial succession in the passing direction (8) of a workpiece.
13. A device according to any one of claim 1 to 12, characterized in that an intake region into the shaping roller arrangement (9, 10, 11) for the workpiece is designed as an adjustable cone.
14. A device according to any one of claim 1 to 12, characterized in that the shaping rollers (12, 13, 14) of each shaping roller arrangement (9, 10, 11) can be arranged on arbitrarily selectable and mutually different pitch circles.
13. A device according to any one of claim 1 to 12, characterized in that an intake region into the shaping roller arrangement (9, 10, 11) for the workpiece is designed as an adjustable cone.
14. A device according to any one of claim 1 to 12, characterized in that the shaping rollers (12, 13, 14) of each shaping roller arrangement (9, 10, 11) can be arranged on arbitrarily selectable and mutually different pitch circles.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009038813A DE102009038813B4 (en) | 2009-08-31 | 2009-08-31 | Device for chipless machining of elongate workpieces |
| DE102009038813.3 | 2009-08-31 | ||
| PCT/AT2010/000312 WO2011022747A1 (en) | 2009-08-31 | 2010-08-27 | Device and method for processing elongate workpieces without cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2772658A1 true CA2772658A1 (en) | 2011-03-03 |
| CA2772658C CA2772658C (en) | 2015-05-12 |
Family
ID=43086902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2772658A Expired - Fee Related CA2772658C (en) | 2009-08-31 | 2010-08-27 | Device and method for processing elongate workpieces without cutting |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2473296B1 (en) |
| CA (1) | CA2772658C (en) |
| DE (1) | DE102009038813B4 (en) |
| PL (1) | PL2473296T3 (en) |
| WO (1) | WO2011022747A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11273483B2 (en) | 2016-12-13 | 2022-03-15 | Shanghai Pan-China Fastening System Co., Ltd. | Threading method, rolling head, apparatus, module and production line for pipe thread, and products thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013107603A1 (en) * | 2013-07-17 | 2015-01-22 | Rollwalztechnik Abele + Höltich GmbH | Device for processing a workpiece |
| DE102017113382B3 (en) | 2017-06-19 | 2018-10-18 | Ffg Werke Gmbh | Thread rolling method and thread rolling device for producing a thread |
| DE102017116895A1 (en) | 2017-07-26 | 2019-01-31 | Mag Ias Gmbh | Method and device for producing a toothing on a cylindrical workpiece |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214637B (en) * | 1959-12-22 | 1966-04-21 | Wilhelm Fette Praez Swerkzeug | Thread rolling head |
| DE4313918C2 (en) * | 1993-04-28 | 1996-02-08 | Reburg Patentverwertungs Gmbh | Device for the continuous chipless forming of an elongated workpiece |
| DE10119569B4 (en) * | 2001-04-21 | 2010-02-25 | "Alwag" Tunnelausbau Gesellschaft Mbh | Device for chipless forming |
| DE102007029548B3 (en) * | 2007-06-25 | 2009-02-05 | Heinz Gruber | Tool assembly for shaping tubular workpiece outer surfaces, without material removal, allows shaping rollers to be used on the axis bolt by changing the spacer rings without altering the dimensions to reduce wear |
-
2009
- 2009-08-31 DE DE102009038813A patent/DE102009038813B4/en active Active
-
2010
- 2010-08-27 EP EP10754657.4A patent/EP2473296B1/en active Active
- 2010-08-27 CA CA2772658A patent/CA2772658C/en not_active Expired - Fee Related
- 2010-08-27 PL PL10754657T patent/PL2473296T3/en unknown
- 2010-08-27 WO PCT/AT2010/000312 patent/WO2011022747A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11273483B2 (en) | 2016-12-13 | 2022-03-15 | Shanghai Pan-China Fastening System Co., Ltd. | Threading method, rolling head, apparatus, module and production line for pipe thread, and products thereof |
| AU2021204565B2 (en) * | 2016-12-13 | 2023-08-10 | Shanghai Pan-China Fastening Systems Co, Ltd. | Rolled pipe thread processing method, rolling head, apparatus, module, production line, and product thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011022747A1 (en) | 2011-03-03 |
| DE102009038813B4 (en) | 2012-09-27 |
| DE102009038813A1 (en) | 2011-04-07 |
| CA2772658C (en) | 2015-05-12 |
| EP2473296A1 (en) | 2012-07-11 |
| EP2473296B1 (en) | 2013-05-29 |
| PL2473296T3 (en) | 2013-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101696224B1 (en) | Method and device for ironing roller spinning | |
| CA2772658C (en) | Device and method for processing elongate workpieces without cutting | |
| US11045848B2 (en) | Cold-pilger rolling mill | |
| US4434645A (en) | Apparatus for the radial shaping of tubular articles | |
| US6269670B2 (en) | Method for forming a workpiece by flow-forming | |
| CN104907595A (en) | Inner support expansion fixture and cutting technology of ultra-thin wall large-scale cylinder type cutting workpiece | |
| KR101718625B1 (en) | Mandrell assembly comprising detachable ring forming body, ring mill apparatus having the same, and rolling method using the same | |
| US5452599A (en) | Method and apparatus for producing vehicle wheel rims | |
| WO2009146715A1 (en) | Bush widening apparatus and process for forging a bush blank | |
| KR20140116032A (en) | Method and device for producing a clinch-rivet connection by means of a rotary oscillating movement | |
| JP2000202556A (en) | Pressure rolling method and pressure roll device | |
| US10569321B2 (en) | Device and method for flow-forming workpieces | |
| RU2436666C2 (en) | Method to install and adjust stocks of parts, such as shafts | |
| JP4278565B2 (en) | Bead forming method and apparatus | |
| RU2339478C1 (en) | Device for profiling of multiple-thread line pipes | |
| US20070119223A1 (en) | Apparatus For Holding At Least Two Rolls Of A Rolling Machine, And Rolling Machine | |
| RU1787061C (en) | Setup for stamping edges of longitudinal grooves | |
| JP6130832B2 (en) | Roll holder cartridge for rolling mill | |
| RU2429108C1 (en) | Ball rotating planetary centre | |
| RU2477664C2 (en) | Device for making helical section tubes | |
| KR20170138445A (en) | Ring rolling devices with axially fixed rolling-element bearings | |
| RU2245407C1 (en) | Method of production of ropes amd device for its realization | |
| CN108778556B (en) | Rolling device for rolling a workpiece of a toothed segment and corresponding method | |
| JP2013507256A (en) | Screw rolling device | |
| EP1569764B1 (en) | A device for rolling metal bands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20130118 |
|
| MKLA | Lapsed |
Effective date: 20170828 |
|
| MKLA | Lapsed |
Effective date: 20170828 |