EP4334050A1 - Verfahren zum walzen eines ringförmigen walzguts mit einem offenen zylindrischen querschnitt in einer ringwalzmaschine sowie ringwalzmaschine zur durchführung des verfahrens - Google Patents
Verfahren zum walzen eines ringförmigen walzguts mit einem offenen zylindrischen querschnitt in einer ringwalzmaschine sowie ringwalzmaschine zur durchführung des verfahrensInfo
- Publication number
- EP4334050A1 EP4334050A1 EP22727768.8A EP22727768A EP4334050A1 EP 4334050 A1 EP4334050 A1 EP 4334050A1 EP 22727768 A EP22727768 A EP 22727768A EP 4334050 A1 EP4334050 A1 EP 4334050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- ring
- inductor
- rolling stock
- stock
- 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
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
Definitions
- the invention relates to a method for rolling a ring-shaped rolling stock with an open cylindrical cross section in a ring rolling machine with inductive heating of the rolling stock during the rolling process.
- the invention relates in particular to a method for producing metal rings with rectangular or profiled cross-sections from various types of steel and special alloys such as titanium and nickel-based alloys, copper alloys and aluminum alloys by rolling.
- the inductive heating of rolling stock during the rolling process when rolling a ring-shaped rolling stock is known in principle, for example from US 2012/0279268 A1.
- This publication relates to a method forging a ring-shaped workpiece while at the same time electrically heating the workpiece by means of induction.
- the method involves partially or completely enclosing the workpiece in a closed or C-shaped magnetizable core around which is wound a coil energized with a low frequency alternating current in the range of about 1000 Hz or less. This method is cumbersome and expensive, not least because of the need to enclose the workpiece with the magnetic or magnetizable core.
- the invention is based on the object of providing a method of the type mentioned in which it is easily possible to compensate for temperature losses of the Compensate the workpiece during the forming and in particular to achieve inductive heating of the rolling stock during the rolling process with the least possible effort.
- the temperature control during rolling is intended to counteract heat losses, in particular through radiation. With the increasing size of the rolling stock or with increasing diameter of the ring during rolling, the surface area increases, which leads to increasing heat losses. According to the invention, these temperature losses should be compensated
- the object is achieved by a method having the features of claim 1 and by a ring rolling machine having the features of claim 11.
- the method includes the use of at least one inductor, which is held at a predetermined and constant coupling distance relative to the rolling stock and is tracked or carried along during the forming process according to the dimensional change of the rolling stock, with the inductor being exposed to an alternating magnetic field, preferably with a frequency between 4 and 10 kHz, is coupled directly into the rolling stock.
- an enclosing of the rolling stock or partial enclosing of the rolling stock with an electrically conductive core is not provided in the method according to the invention and is not required. Instead, at least one inductor is positioned at a relatively small distance from the rolled stock and held there during the rolling process. This distance, which is dimensioned in such a way that it enables an induction of an alternating magnetic field in the rolling stock and an associated heating of the rolling stock, is referred to in the present application as the coupling distance.
- the inductor can be formed as a flat or C-shaped or L-shaped coil.
- the inductor is preferably positioned and held on the outer circumference of the rolling stock during the rolling process.
- the rolling stock in the form of a cylindrical ring open on both sides, which preferably has a profiled cross-section, undergoes dimensional changes during the forming process.
- the diameter of the ring-shaped rolling stock increases, the height of the ring decreases and its width also decreases. Accordingly, the invention provides for tracking the inductor according to the change in dimension of the rolling stock with a constant coupling distance to the rolling stock.
- the inductor can be fastened to a support arm which, for example, can follow the increase in diameter of the ring-shaped rolling stock with a rolling stand for axial rolling of the ring rolling machine.
- the support arm can be attached to the roll stand, for example.
- the inductor is tracked in a controlled manner by means of at least one manipulator with at least one linear movement and/or one rotary movement on a movement axis. This can be accomplished in particular by means of a multi-axis industrial robot, on which at least one inductor can be arranged.
- an actual distance of the inductor from the rolling stock is detected by sensors during the rolling process and the coupling distance is automatically regulated as a target distance depending on the actual distance.
- a regulation can be carried out with a control unit of the ring rolling machine provided for this purpose.
- regulation can be carried out using a separate control unit.
- the sensory detection of the actual distance of the inductor from the rolling stock takes place in a tactile or non-contact manner.
- this can be done by means of at least one feeler roller, which can be attached directly to the inductor, for example.
- the distance between the inductor and the rolling stock is predetermined by means of spacers lying against the rolling stock during the rolling process.
- a non-contact detection of the actual distance can be provided by means of at least one optical sensor.
- Direction of rotation of the rolling stock takes place at least in front of a main roll or an axial roll arrangement of the ring rolling machine, so that the rolling stock is heated in each case immediately before an engagement of the main roll or an engagement of the axial roll assembly in the rolling stock.
- the invention is to be understood in such a way that the inductor or several inductors can be provided at any point of the ring rolling machine on the circumference of the rolling stock.
- the inductor is guided on a support arm which preferably has at least two degrees of freedom, preferably has three degrees of freedom.
- the inductor is preferably guided in a linearly displaceable and rotatable manner.
- the inductor is carried along during the rolling process with the increasing radius and with the shifting of the axis of rotation of the cylindrical rolling stock.
- a further aspect of the invention relates to a ring rolling machine which is preferably designed to carry out the method described above.
- the ring rolling machine is preferably designed as a radial or radial-axial ring rolling machine and comprises at least one driven main roll and at least one mandrel roll, preferably also at least two axial rolls, preferably as conical rolls, and means for centering a ring-shaped rolling stock.
- the ring rolling machine according to the invention is characterized by at least one inductor which during
- Dimensional change of the rolling stock can be tracked to maintain a constant coupling distance, with the inductor being able to induce an alternating magnetic field, preferably with a frequency between 4 and 10 kHz, in the rolling stock.
- At least one of the axial rollers can be designed as a driven roller.
- the ring rolling machine can be designed as a radial ring rolling machine or as a radial-axial ring rolling machine. Only in the latter case would the ring rolling machine according to the invention comprise axial rolling.
- pivoting arms with centering rollers can be provided which rest against the outer circumference of the rolling stock during the rolling process.
- the inductor is attached to a support arm of a manipulator that can be moved in at least two degrees of freedom, preferably in three degrees of freedom.
- the inductor is arranged in the direction of rotation of the rolling stock at least in front of the main roll or the axial rolls.
- one inductor is arranged in the direction of rotation of the rolling stock in front of the main roller and the axial rollers.
- the invention is to be understood in such a way that more than two inductors can also be provided on the circumference of the rolling stock.
- Figure 1 is a perspective view of a ring rolling machine according to the invention
- Figure 2 is a plan view of the ring rolling machine according to the invention.
- Figure 3 is a perspective view of the inductor.
- the ring rolling machine 1 shown in the figures comprises a driven main roll 2 and a rolling table 4.
- the rolling stock, designated 5, is designed as a closed ring or as a cylinder that is open on both sides.
- the rolling stock 5 has a rectangular cross-sectional profile and rests on the rolling table 4.
- the rolling stock 5 is rolled clockwise between the main roll 2 and the mandrel roll 3, reducing the wall thickness radially and simultaneously reducing the height axially.
- the rolling stock 5 is centered in the ring rolling machine 1 by means of centering rollers 7 fastened to swivel arms 6 .
- the rolling stock 5 is rolled axially by means of two axial rolls 8 .
- the axial rollers 8 are designed as conical rollers and are mounted in an axial stand 10 .
- the axial stand 10 can be moved or adjusted with respect to the center point of the rolled stock 5, which shifts during the rolling process as a result of the increase in the radius, specifically radially with respect to the rolled stock
- a support arm 11 is fastened to the axial frame 10, and an inductor 12 is arranged on the remote end of the latter, which is directed radially inward with respect to the rolling stock 5.
- the inductor 12 can alternatively be fastened to an articulated arm of an industrial robot which is set up on the circumference of the ring rolling machine 1 .
- the inductor 12 comprises a transformer unit 14 arranged on a base plate 13 and an induction coil 15, as can be seen from FIG.
- the transformer unit 14 is connected to a capacitor cabinet (not shown) via air- and/or water-cooled cables and ensures the electrical adjustment of the induction voltage to the output voltage of a frequency converter.
- the frequency converter works in a frequency range between 4 and 10 kHz.
- Two spacers 16 are also arranged on the base plate 13, between which the induction coil 15 is located.
- the spacers 16 are designed as feeler rollers which extend parallel to the axis of rotation of the rolling stock 5 and whose roller heads 17 are held in engagement with the rolling stock 5 during the rolling process.
- the spacers 16 are water-cooled.
- Coolant connections 18 are provided for the aforementioned spacers 16 through which coolant flows
- the induction coil, the transformer unit and the spacers 16 are arranged on the base plate so that they can be adjusted both linearly and rotatably. Since, as described above, the radius of the rolling stock 5 increases during the rolling process and the distance between the induction coil 15 and the rolling stock 5 would consequently increase, a further linear adjustment between the spacers 16 and the induction coil 15 is provided. The adjustability ensures that the distance between the induction coil 15 and the rolling stock can be kept constant.
- the support arm 11 with the axial stand 10 can also be moved radially with respect to the rolling stock.
- the height of the rolling stock 5 will decrease, on the other hand the diameter of the rolling stock 5 will increase so that the support arm 11 must be adjusted radially at least with respect to the rolling stock 5 .
- the induction coil 15 shown in FIG. 3 has an approximately L-shaped cross-sectional profile which extends under part of the underside of the annular rolled stock 5. According to the invention, the induction coil can also have a different geometry. It is not necessary for the induction coil 15 to extend under the underside of the ring-shaped rolled stock 5 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
- Metal Rolling (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021204433.6A DE102021204433A1 (de) | 2021-05-03 | 2021-05-03 | Verfahren zum Walzen eines ringförmigen Walzguts mit einem offenen zylindrischen Querschnitt in einer Ringwalzmaschine sowie Ringwalzmaschine zur Durchführung des Verfahrens |
| PCT/EP2022/061712 WO2022233787A1 (de) | 2021-05-03 | 2022-05-02 | Verfahren zum walzen eines ringförmigen walzguts mit einem offenen zylindrischen querschnitt in einer ringwalzmaschine sowie ringwalzmaschine zur durchführung des verfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4334050A1 true EP4334050A1 (de) | 2024-03-13 |
| EP4334050B1 EP4334050B1 (de) | 2025-02-26 |
Family
ID=81940544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22727768.8A Active EP4334050B1 (de) | 2021-05-03 | 2022-05-02 | Verfahren zum walzen eines ringförmigen walzguts mit einem offenen zylindrischen querschnitt in einer ringwalzmaschine sowie ringwalzmaschine zur durchführung des verfahrens |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20240253105A1 (de) |
| EP (1) | EP4334050B1 (de) |
| JP (1) | JP7721678B2 (de) |
| CN (1) | CN117255720A (de) |
| DE (1) | DE102021204433A1 (de) |
| ES (1) | ES3028806T3 (de) |
| WO (1) | WO2022233787A1 (de) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555890Y2 (de) * | 1979-11-19 | 1980-12-24 | ||
| JPH01237036A (ja) | 1988-03-18 | 1989-09-21 | Mitsubishi Nagasaki Kiko Kk | リングローリングミル |
| JPH05329569A (ja) * | 1992-05-27 | 1993-12-14 | Ishikawajima Harima Heavy Ind Co Ltd | 金属リング体の成形方法及びその装置 |
| JPH05337585A (ja) * | 1992-06-05 | 1993-12-21 | Ishikawajima Harima Heavy Ind Co Ltd | 金属リング体等の恒温圧延方法 |
| JPH08264274A (ja) * | 1995-03-24 | 1996-10-11 | Daido Steel Co Ltd | 誘導加熱用コイルから発生する誘導磁束を遮蔽する方法 |
| WO2012151385A2 (en) | 2011-05-03 | 2012-11-08 | Inductoheat, Inc. | Forging of an annular article with electric induction heating |
| US11076454B2 (en) | 2014-05-16 | 2021-07-27 | Illinois Tool Works Inc. | Induction heating system temperature sensor assembly |
| EP3177419B1 (de) | 2014-08-08 | 2019-10-30 | Muraro S.r.l. | Maschine und verfahren zum formen ringförmiger elemente wie walzmaschinen und verfahren zum kreisförmigen walzen ringförmiger elemente |
| JP6196414B1 (ja) | 2015-12-03 | 2017-09-13 | 日立金属Mmcスーパーアロイ株式会社 | リング圧延体の製造方法 |
| WO2017094864A1 (ja) * | 2015-12-03 | 2017-06-08 | 日立金属Mmcスーパーアロイ株式会社 | リング圧延体の製造方法 |
| CN109590417A (zh) | 2018-11-08 | 2019-04-09 | 江阴市恒润环锻有限公司 | 一种耐高温耐高压不锈钢环件的锻造工艺及设备 |
| CN109663821B (zh) | 2019-01-10 | 2019-12-10 | 燕山大学 | 一种可调式感应加热轧制装置及方法 |
| AT522345B1 (de) | 2019-03-29 | 2020-11-15 | Primetals Technologies Austria GmbH | Heizungsvorrichtung zum induktiven Erhitzen eines Flachstahlstreifens in einem Warmwalzwerk |
| CN110605351B (zh) | 2019-09-30 | 2024-12-24 | 天津理工大学 | 航天用超大型环件轧制过程中温度补偿的方法及专用装置 |
-
2021
- 2021-05-03 DE DE102021204433.6A patent/DE102021204433A1/de active Pending
-
2022
- 2022-05-02 CN CN202280032728.5A patent/CN117255720A/zh active Pending
- 2022-05-02 JP JP2023568167A patent/JP7721678B2/ja active Active
- 2022-05-02 EP EP22727768.8A patent/EP4334050B1/de active Active
- 2022-05-02 ES ES22727768T patent/ES3028806T3/es active Active
- 2022-05-02 US US18/289,217 patent/US20240253105A1/en active Pending
- 2022-05-02 WO PCT/EP2022/061712 patent/WO2022233787A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021204433A1 (de) | 2022-11-03 |
| WO2022233787A1 (de) | 2022-11-10 |
| CN117255720A (zh) | 2023-12-19 |
| EP4334050B1 (de) | 2025-02-26 |
| US20240253105A1 (en) | 2024-08-01 |
| JP7721678B2 (ja) | 2025-08-12 |
| ES3028806T3 (en) | 2025-06-20 |
| JP2024520193A (ja) | 2024-05-22 |
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