EP3375541A1 - Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks - Google Patents

Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks Download PDF

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Publication number
EP3375541A1
EP3375541A1 EP17305273.9A EP17305273A EP3375541A1 EP 3375541 A1 EP3375541 A1 EP 3375541A1 EP 17305273 A EP17305273 A EP 17305273A EP 3375541 A1 EP3375541 A1 EP 3375541A1
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EP
European Patent Office
Prior art keywords
mandrel
main wheel
rolling mill
rolling
axis
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.)
Withdrawn
Application number
EP17305273.9A
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English (en)
French (fr)
Inventor
Peter Bierhalter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forge Pat GmbH
Original Assignee
Forge Pat GmbH
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Publication date
Application filed by Forge Pat GmbH filed Critical Forge Pat GmbH
Priority to EP17305273.9A priority Critical patent/EP3375541A1/de
Priority to PCT/EP2018/056172 priority patent/WO2018167021A1/fr
Publication of EP3375541A1 publication Critical patent/EP3375541A1/de
Withdrawn legal-status Critical Current

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    • 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 multimandrin mill for use in the continuous rolling of parts of revolution.
  • the invention relates to a multimandrin mill for continuously rolling parts of revolution, this mill comprising a mandrel-holder table rotatably mounted about a first axis and a main wheel rotatably mounted about a second parallel axis and offset from the first axis.
  • the position of the main wheel relative to each mandrel is adjustable by means of a relative translation between the first and second axes, in a direction perpendicular to these axes.
  • the adjustment of the position of the wheel relative to the mandrels can be obtained in a single operation, thanks to the displacement in translation of the main wheel relative to the mandrel-holder table, this displacement in translation resulting of the relative translation between the first and second axes.
  • the term "continuous rolling” means that the actual rolling operation takes place on a part of the rolling mill, while the loading and unloading operations of the parts take place in masked time, on other parts of the rolling mill, to the point where there is continuously or almost continuously a part being rolled when the rolling mill is operating.
  • the continuous rolling must be distinguished from the sequential rolling where the pieces are rolled one after the other, as is the case in the rolling mill marketed by SMS MEER Mochengladbach (Germany) under the name MERW.
  • the means for adjusting the position of the main wheel relative to each mandrel comprise two eccentric movable eccentric same intercalated between the fixed eccentric and the second axis and, in step a), the two eccentric movable are rotated in opposite directions and with the same angular amplitudes, around the second axis.
  • the outer diameter of a workpiece during rolling is monitored, while the method comprises a complementary step of stopping the rolling of a workpiece by changing the position of the main wheel. relative to the mandrel table when the outer diameter reaches a predetermined threshold value.
  • the method comprises complementary steps consisting in measuring the radial thickness of a rolled piece at the output of the rolling mill, with identification of the mandrel used for its rolling, in determining a radial offset to be applied to the relative position of the outer surface of the main wheel and the identified mandrel and to apply the offset for the identified mandrel by changing the position of the main wheel relative to the mandrel table, before the identified mandrel arrives in a rolling mill area.
  • the rolling mill 2 represented on the Figures 1 to 7 comprises a table 4 rotatably mounted around a first axis X4 which is vertical in the use configuration of the rolling mill 2 and which is considered fixed with respect to a frame 5 of the rolling mill 2, this frame being represented, partially, only to figures 1 and 7 .
  • Unrepresented means mounted on or in the frame 6 can drive the table 4 in rotation about the axis X4.
  • the table 4 carries four mandrels 42, 44, 46 and 48 which are regularly distributed around the axis X4, at 90 °, and extend at the same radial distance from this axis.
  • Each mandrel 42 to 48 is fixed in position on the mandrel holder table 4 and rotatable about an axis X42, X44, X46, X48 parallel to the axis X4 and radially offset with respect thereto.
  • Each mandrel is supported, relative to the mandrel holder table 4, by means of two subassemblies. This is shown only for chuck 44 to figures 1 and 7 , with two subsets 82 and 84 arranged along the axis X44, respectively below and above the table 4. For clarity of the drawing, the subsets 84 located above table 4 and associated respectively with the mandrels 42, 46 and 48 are not shown. The subassemblies 82 located above the table 4 and associated with the mandrels 42 to 46 are however visible. The subassemblies 82 and 84 are supported relative to the table 4 by means of mechanical means not shown, of angle or column type.
  • Each subassembly 82 comprises an outer housing 821 supported with respect to the table 4, a central bushing 822, a double roller bearing 823 and a single roller bearing 824.
  • the bearings 823 and 824 support and center the bushing 822 in the housing 821.
  • the subassembly 82 also includes axial stops formed by two ball bearings 825.
  • a tool 826 for holding the lower end 44a of the mandrel 44 is mounted on the sleeve 822.
  • Each subassembly 84 is identical to the subassembly 82 mounted on the same mandrel and comprises, meanwhile, a housing 841, a bushing 842, a double bearing 843, a single bearing 844, axial ball stops 845 and a tool 846 holding the the upper end 44b of the mandrel 44.
  • the subassemblies 82 and 84 make it possible to guarantee the alignment of the mandrel 44 on the axis X44 during operation of the rolling mill 2, even when this mandrel undergoes a force E 1 of reaction exercised by a part being rolled, as shown in figure 7 .
  • At least one of the subassemblies 82 and 84 is retractable in the direction of the axis X44.
  • the bearings of the subassemblies 82 and 84 may be conical bearings.
  • the axial distance between the tools 826 and 846 can be adjusted to the desired height for the workpiece 100.
  • the tools 826 and 846 can be used to conform the workpiece 100 to the workpiece 100. of its upper and lower surfaces in the configuration of the figure 7 .
  • the mill 2 also comprises a main wheel 6 which is rotatably mounted about an axis X6 which is parallel and offset with respect to the axis X4.
  • the wheel 6 is rotated about the axis X6 by an electric motor (not shown) and supported by the frame 5.
  • the subassemblies 82 and 24 are respectively located below and above the wheel 6, that is to say on either side of this wheel along the axis X6.
  • the subassemblies 82 and 84 are not arranged at the same level as the wheel 6 in vertical projection.
  • V4 the speed of rotation of the mandrel table 4 around the axis X4.
  • V6 is the speed of rotation of the main wheel 6 about the axis X6. In practice, the speed V6 is greater than the speed V4.
  • D46 is the distance between the axes X4 and X6, this distance being measured perpendicularly to these axes.
  • the mandrels 42 to 48 have, in the frame of the wheel 6, an eccentric movement that allows them to pass successively from a first zone Z2, loading a mandrel with a blank E100 rolling part, a second zone Z4 rolling, represented by an angular sector gray to the figure 2 and centered on the axis X4 and whose angle ⁇ is noted at the apex.
  • the rolled piece is noted 100 during the rolling operation which takes place on zone Z4.
  • the mandrel then passes into a third unloading zone Z6, where the workpiece 100 can be disengaged from the mandrel.
  • the mandrel finally passes through a fourth empty zone Z8, intermediate between zones Z6 and Z2, in the direction of rotation of parts 4 and 6.
  • the mandrels 42 to 48 are respectively represented in the zones Z2 to Z8. It will be understood that, as a function of the rotation of the table 4 about the axis X4, each mandrel passes successively through each of the zones Z2 to Z8.
  • the outer peripheral surface S100 of the piece 100 during rolling is in contact with the outer peripheral surface S6 of the wheel 6, this surface S6 being cylindrical, circularly centered and centered on the axis X6.
  • a fixed eccentric 12 is mounted under the parts 4 and 6 and defines a circular peripheral peripheral surface S12, centered on the axis X4 and intended to cooperate with an inner peripheral surface s4 of the mandrel-holder table 4, also circular and centered on the axis X4, to guide this table 4 in rotation around the axis X4.
  • a shaft 62 integral with the wheel 6, defines the axis X6.
  • the shaft 62 is engaged in the central opening of the fixed eccentric 12 which is defined by an inner peripheral surface s12 of this eccentric.
  • a set of two mobile eccentrics namely a first movable eccentric 22 and a second movable eccentric 24, is interposed between the fixed eccentric 12 and the shaft 62. More specifically, the first movable eccentric 22 is disposed in the central opening the eccentric 12, while the second mobile eccentric 24 is disposed in the central opening of the first mobile eccentric 22.
  • a bearing 26 is disposed in the central opening of the second mobile eccentric 24 and provides the interface between the parts 24 and 62.
  • the bearing 26 is a roller bearing. Alternatively, it may be a ball bearing or a plain bearing.
  • the inner surface of the second movable eccentric 24, the bearing 26 and the shaft 62 are cylindrical, with a circular section centered on the axis X6.
  • L a reference line perpendicular to the axes X4 and X6 and which contains the axes X44 and X48 in the configuration of the Figures 2 to 6 .
  • the distance d46 is measured along the line L.
  • the distance d46 has a maximum value.
  • the points P1 and P2 are aligned on the line L and are located, with respect to the axis X4, opposite the axis X6.
  • the radial thickness available to conform the workpiece 100 in zone Z4 is minimal.
  • the trace of the surface S6 intersects the trace of the mandrel 44, which corresponds to the fact that the surface S6 may have a stepped outer shape, as well as the mandrel.
  • the surface S6 is not stepped and, in the configuration where the distance between the surface S6 and the mandrel 44 is minimal, the trace of this surface does not intersect the mandrel 44.
  • the trace of the surface S6 in this configuration is represented in center line at the figure 2 ,
  • the reference 1 S6 and the position of the axis X6 is marked by reference 1 X6.
  • the distance d46 then has the value d46 max located at the figure 2 .
  • the configuration of the figure 4 is represented on the figure 2 by a solid circle referenced S6 2 , which shows the outer surface S6 of the wheel 6, and the position of the axis X6 is identified by the reference X6 2 .
  • the distance d46 has the minimum value d46 min located in the lower part of the figure 2 .
  • the figure 5 represents an intermediate configuration between that of figures 3 and 4 or, compared to the configuration of the figure 3 the eccentrics were each rotated 90 ° about the axis X6, respectively in the direction of the rotation arrows R22 and R24 which are opposite, so that the points P1 and P2 are aligned on a straight line ⁇ perpendicular to the reference line L, this line Z2 being itself parallel to another reference line L 'which connects the axes X42 and X46 in the configuration of the figures 2 and following.
  • the configuration of the figure 5 is represented on the figure 2 by a dashed circle referenced S6 3 , which shows the outer surface S6 of the wheel 6, and the position of the axis X6 is identified by the reference X6 3 .
  • the distance d46 has a median value d46 med located in the lower part of the figure 2 .
  • the thickness e100 has a value greater than the minimum value of the configuration of the figure 3 and less than the maximum value of the configuration of the of the figure 4 .
  • the figure 6 represents another intermediate configuration where the first and second mobile eccentrics have been rotated respectively in the direction of the arrows R22 and R24 over angular ranges strictly less than 90 ° and marked by angles ⁇ 1 and ⁇ 2. For the sake of clarity, this configuration of the figure 6 is not taken over figure 2 . If it were, the trace of axis X6 would be between the positions marked X6 2 and X6 3 in this figure.
  • the thickness e100 has an intermediate value between those of the second and third configurations.
  • the first and second movable eccentrics 22 and 24 have the same eccentricity and, when adjusting the position of the main wheel 6 relative to the mandrel-holder table 4, these eccentrics are rotated in rotation. opposite direction, with the same angular amplitude. This ensures that the axes X4 and X6 remain aligned on the reference line L, so that the direction of movement D is straight.
  • the first and second mobile eccentrics have different eccentricities and / or are driven at different angular amplitudes.
  • the relative position of the mandrels 42, 44, 46 and 48 and the main wheel 6 is adjusted by moving the main wheel 6 relative to the mandrel holder table 4, that is to say by moving in translation X6 axis relative to axis X4, perpendicular to these two axes, along the reference line L.
  • This adjustment is obtained by rotating the first and second mobile eccentric 22 and 24 respectively in the direction of the arrows R22 and R24, as explained above.
  • This rotational movement of the mobile eccentrics can be performed with one or more electric motors, including servomotors.
  • the outside diameter of the piece 100 during rolling can be monitored by any appropriate means, for example an optical sensor, which makes it possible to detect when the desired dimension has been obtained for the piece 100, by reaching a predetermined threshold value.
  • the rolling can be stopped, by changing the position of the main wheel 6 relative to the mandrel holder table 4 by appropriate operation of the first and second mobile eccentric 22 and 24.
  • the rolling operation can be stopped before the mandrel 44 reaches the configuration shown in FIG. figure 2 at the end of the rolling zone Z4, by moving the main wheel 6 to the left of this figure, so that it no longer exerts compression force on the workpiece 100 on the mandrel.
  • the radial thickness is a posteriori, at the output of the rolling mill 2, by a coasting on the part 100, with identification of the mandrel used for its rolling ..
  • the radial thickness of a rolled piece 100 is measured at the output of the rolling mill, with identification of the mandrel used for its rolling.
  • a radial offset is determined to be applied to the relative position of the outer surface S6 of the main wheel 6 and the mandrel identified beforehand, in order to obtain a radial thickness in accordance with a production instruction.
  • This offset is then applied for the identified mandrel, during subsequent rolling operations, by changing the position of the main wheel 6 relative to the mandrel-holder table 4, thanks to a relative translation between the axes X4 and X6 obtained at means of eccentrics 22 and 24 which are motorized, before the identified mandrel reaches the rolling zone Z4.
  • the invention is shown in the figures in the case where, in addition to the fixed eccentric 12, two mobile eccentrics 22 and 24 are used. It is however possible to implement the invention with a single mobile eccentric associated with the fixed eccentric, which has the advantage of greater simplicity, at the cost of a decrease in accuracy. Indeed, in this case, the position of the rolling zone Z4 can not be fixed on an angular sector of fixed amplitude since this rolling zone varies as a function of the position of the single mobile eccentric. Moreover, in this case, the displacement Relative translation between the X6 and X4 axes does not necessarily occur along the reference line L.
  • the mandrel is supported only by a single subassembly located under the mandrel-holder table.
  • mandrel holder table 4 carries four mandrels 42 to 48.
  • the number of mandrels is not limiting. It can be different from 4, especially equal to 6, 8 or 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP17305273.9A 2017-03-14 2017-03-14 Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks Withdrawn EP3375541A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17305273.9A EP3375541A1 (de) 2017-03-14 2017-03-14 Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks
PCT/EP2018/056172 WO2018167021A1 (fr) 2017-03-14 2018-03-13 Laminoir multimandrin, méthode de réglage de la position des mandrins d'un tel laminoir et procédé de laminage en continu au moyen d'un tel laminoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17305273.9A EP3375541A1 (de) 2017-03-14 2017-03-14 Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks

Publications (1)

Publication Number Publication Date
EP3375541A1 true EP3375541A1 (de) 2018-09-19

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EP17305273.9A Withdrawn EP3375541A1 (de) 2017-03-14 2017-03-14 Mehrwalzenringwalzwerk, methode zum einstellen der dornpositionen eines solchen walzwerks und kontinuierliches walzverfahren mithilfe eines solchen walzwerks

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EP (1) EP3375541A1 (de)
WO (1) WO2018167021A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113084055A (zh) * 2021-03-25 2021-07-09 武汉理工大学 大型环件径-轴向轧制过程偏心状态自适应调控方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047590A (en) * 1979-04-28 1980-12-03 Thyssen Industrie Multi-mandrel ring rolling machine
WO2015127964A1 (de) * 2014-02-25 2015-09-03 Hatebur Umformmaschinen Ag Ringwalzvorrichtung
US20150283592A1 (en) 2014-04-08 2015-10-08 Sms Meer Gmbh Multi-roll table ring-rolling mill as well as method for rolling rings in a multi-roll table ring-rolling mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047590A (en) * 1979-04-28 1980-12-03 Thyssen Industrie Multi-mandrel ring rolling machine
WO2015127964A1 (de) * 2014-02-25 2015-09-03 Hatebur Umformmaschinen Ag Ringwalzvorrichtung
US20150283592A1 (en) 2014-04-08 2015-10-08 Sms Meer Gmbh Multi-roll table ring-rolling mill as well as method for rolling rings in a multi-roll table ring-rolling mill
EP2933037A1 (de) * 2014-04-08 2015-10-21 SMS Meer GmbH Mehrwalzentischringwalzwerk sowie Verfahren zum Walzen von Ringen in einem Mehrwalzentischringwalzwerk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113084055A (zh) * 2021-03-25 2021-07-09 武汉理工大学 大型环件径-轴向轧制过程偏心状态自适应调控方法
CN113084055B (zh) * 2021-03-25 2021-11-30 武汉理工大学 大型环件径-轴向轧制过程偏心状态自适应调控方法

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