EP1072337B1 - Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür - Google Patents

Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür Download PDF

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Publication number
EP1072337B1
EP1072337B1 EP19990114437 EP99114437A EP1072337B1 EP 1072337 B1 EP1072337 B1 EP 1072337B1 EP 19990114437 EP19990114437 EP 19990114437 EP 99114437 A EP99114437 A EP 99114437A EP 1072337 B1 EP1072337 B1 EP 1072337B1
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EP
European Patent Office
Prior art keywords
frame members
pair
flat
rod member
elongate frame
Prior art date
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Expired - Lifetime
Application number
EP19990114437
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English (en)
French (fr)
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EP1072337A1 (de
Inventor
Hideto c/o N.H.K. Builder Co. Ltd. Hanada
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NHK Builder Co Ltd
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NHK Builder Co Ltd
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Publication date
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Priority to ES99114437T priority Critical patent/ES2217653T3/es
Priority to DE69915813T priority patent/DE69915813T2/de
Priority to EP19990114437 priority patent/EP1072337B1/de
Publication of EP1072337A1 publication Critical patent/EP1072337A1/de
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Publication of EP1072337B1 publication Critical patent/EP1072337B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • 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
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • 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
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks

Definitions

  • the present invention relates to a flat-die type rolling machine according to the preamble of claim 1.
  • a flat-die type rolling machine according to the preamble of claim 1.
  • Such a machine is disclosed in JP-A-6-335743 and comprises a pair of flat dies for squeezing and rotating a workpiece therebetween for shaping an outer circumferential surface of the workpiece.
  • the invention relates more particularly to techniques for applying a tightening force to a pair of elongate frame members which receive from the flat dies respective components of a rolling reaction force, for improving accuracy of rolled products.
  • This invention is also concerned with a method of fastening together such a pair of elongate frame members and a spacer member in the flat-die type rolling machine defined in claim 1.
  • a flat-die type rolling machine has a pair of opposed flat dies which are disposed on diametrically opposite sides of a cylindrical workpiece such that at least one of the flat dies is linearly movable relative to the other, so that the workpiece is squeezed and rolled by the opposed flat dies, to thereby shape an outer circumferential surface of the workpiece.
  • components of a rolling reaction force are transferred from the workpiece to the flat dies in opposite directions away from each other in a direction in which the flat dies are spaced apart from each other.
  • the flat dies are supported by a pair of elongate frame members which are spaced apart from each other in the above-indicated direction, so that the frame members receive the respective components of the rolling reaction force from the flat dies interposed therebetween, in the rolling operation.
  • An example of such a flat-die type rolling machine is disclosed in JP-Y1-50-99243.
  • the pair of elongate frame members in such a flat-die type rolling machine are connected to each other at their longitudinally intermediate portions by a tie bar device, in order to reduce an amount of deflection of the intermediate portions of the frame members away from each other.
  • a tie bar device In the presence of such a tie bar, however, the conventional rolling machine inevitably suffers from a significant amount of outward deflection of the frame members due to the rolling reaction force generated in the rolling process, leading to considerable deterioration of the dimensional accuracy of rolled products.
  • a second object of the invention is to provide a method suitable for fastening together the pair of elongate frame members and at least one space member interposed therebetween in such a flat-die type rolling machine, for minimizing the amount of deflection of the frame member due to a rolling reaction force generated in a rolling process.
  • the first object indicated above may be achieved according to a first aspect of this invention, which provides a flat-die type rolling machine comprising a pair of flat dies movable relative and parallel to each other for squeezing and rolling a workpiece therebetween to shape an outer circumferential surface of the workpiece, and a pair of elongate frame members extending parallel to each other in a first direction and spaced apart from each other in a second direction perpendicular to the first direction such that the pair of flat dies are interposed between the pair of elongate frame members in the second direction, the pair of elongate frame members being connected to each other at opposite longitudinal ends portions thereof and disposed so as to receive from the pair of flat dies, respectively, respective components of a rolling reaction force which are transferred from the workpiece to the pair of flat dies in opposite directions away from each other in the second direction, the flat-die type rolling machine further comprising a fastening device including at least one spacer member interposed between mutually corresponding longitudinally intermediate portions of the pair of elongate
  • a considerably large tightening force is applied to the longitudinally intermediate portions of the elongate frame members, by so-called “shrinkage tightening" of the at least one tightening rod member.
  • the sufficiently large tightening force is generated as a result of elongation of the at least one tightening rod member by heating thereof by activation of the heater and subsequent contraction of the at least one tightening member by cooling thereof by turning off the heater.
  • the fastening device provided according to the present invention eliminates a need of increasing the rigidity of the frame members, which unfavorably results in an increase in the size and weight of the rolling machine.
  • the tightening device adapted to apply the tightening force sufficient to resist the rolling reaction force for minimizing the deflection of the frame members makes it possible to effectively minimize undesirable vibrations and noises which would take place due to pulsation of the rolling reaction force in the rolling process.
  • each of the above-indicated at least one tightening rod member is a bolt member extending through the pair of elongate frame members and one of the at least one spacer member.
  • This bolt member has a head at one of opposite ends thereof, for contact with one of the pair of elongate frame members, and a threaded end portion remote from the head, the fastening device further including a nut which engages the threaded end portion of the bolt member so as to be brought into contact with one of the pair of elongate frame members when the bolt member has been elongated by heating thereof by the heater.
  • the above-indicated at least one spacer member consists of two spacer members which are spaced apart from each other in a third direction perpendicular to the first and second directions, and the above-indicated at least one tightening rod member includes two rod members which extend through the two spacer members, respectively.
  • the above-indicated at least one tightening rod member consists of four rod members consisting of two rod members extending through one of the two spacer members and spaced apart from each other in the first direction, and two rod members extending through the other of the two spacer members and spaced apart from each other in the first direction.
  • each of the at least one tightening rod member is formed of a material that permits each tightening rod member to be elongated by heating thereof by an amount equal to 0.05-0.15% of a distance between outer surfaces of the pair of elongate frame members with which the at least one tightening rod member is associated for applying the tightening force.
  • each tightening rod member may be formed of a chrome-molybdenum steel. The amount indicated above is preferably within a rnage of 0.06-0.12% of the above-indicated distance, more preferably within a range of 0.08-0.10% of the distance.
  • the second object indicated above may be achieved according to a second aspect of this invention, which provides a method of fastening together the pair of elongate frame members and the at least one spacer member in the flat-die type rolling machine according to the first aspect of his invention, the method being characterized by comprising the steps of: placing at least one tightening rod member on the flat-die type rolling machine, in association with the pair of elongate frame members and the at least one spacer member interposed therebetween; placing a heater in the longitudinally extending hole of each of the at least one tightening rod member, and turning on the heater to heat each tightening rod member, for causing each tightening rod member to be elongated; fixing each tightening rod member, after each tightening rod member has been elongated, so that a tightening force is applied to the pair of elongate frame members such that the elongate frame members are forced against the at least one spacer member in the opposite directions toward each other in the second direction after each tightening rod member has been contracted by
  • the step of placing the at least one tightening rod member comprises positioning at least one bolt member such that each of the at least one bolt member extends through the pair of elongate frame members and the at least one spacer member and such that a head of each bolt member provided at one of opposite ends thereof is in contact with one of the pair of elongate frame members, and the step of fixing each tightening rod member comprises screwing a nut on a threaded end portion of each bolt member remove from the head, in contact with the other of the pair of elongate frame members when each bolt member has been elongated by heating thereof by the heater.
  • the step of placing a heater in the longitudinally extending hole and turning on the heater comprises holding the heater in an on state until each tightening rod member has been elongated by an amount equal to 0.05-0.15% of a distance between outer surfaces of the pair of elongate frame members with which the at least one tightening rod member is associated for applying the tightening force.
  • the amount indicated above is preferably within a rnage of 0.06-0.12% of the above-indicated distance, more preferably within a range of 0.08-0.10% of the distance.
  • a flat-die type rolling machine 10 which includes a base 12 and a pair of generally planar elongate frame members 14 which are fixed on and extend upwards from the upper surface of the base 12, in parallel with each other.
  • the two frame members 14 are spaced apart from and opposed to each other in a first horizontal direction.
  • the two frame members 14, which are connected at their lower ends to each other by the base 12, are connected at their upper ends to each other by a connecting frame 16.
  • the rolling machine 10 has a generally portal configuration, as shown in Fig. 1.
  • a spacing between the two frame members 14 is determined by two spacer blocks 18, 20 interposed between mutually corresponding and opposed longitudinally intermediate portions of the two frame members 14.
  • the spacer block 18 is located at one of widthwise opposite end portions of each frame member 14, which are opposed to each other, as viewed in a second horizontal direction perpendicular to the first horizontal direction in which the two frame members 14 are spaced apart from each other.
  • the other spacer block 20 is located at the other widthwise end portion of each frame member 14.
  • the two frame members 14 and the two spacer members 18, 20 are fastened together by four tightening rod members in the form of long tie bolts 48, and corresponding nuts 50.
  • Each of the two frame members 14 has a T-shaped guide rail 22 formed on its inner surface such that the guide rails 22 of the two frame members 14 extend in the vertical direction and are opposed to each other in the first horizontal direction.
  • the two frame members 14 carry respective slides 24 which have respective T-shaped slots or recesses 26 engaging the respective T-shaped guide rails 22.
  • the slides 24 are vertically slidably mounted on the guide rails 22.
  • the slides 24 carry respective die holders 30 fixed thereto by suitable means such as bolts.
  • the die holders 30 support respective flat dies 28 fixed thereto, such that a pair of flat dies 28 are opposed to each other in the first horizontal direction and are movable in the vertical direction relative to each other with the respective slides 24.
  • each slide 24 there is fixed a piston rod 34 of a reciprocating hydraulic cylinder 32 attached to the connecting frame 16, as shown in Fig. 1.
  • These two reciprocating hydraulic cylinders 32 are controlled to move the corresponding two slides 24 in the opposite vertical directions so that one of the two flat dies 28 is moved down with the corresponding slide 24 while the other flat die 28 is moved up with the corresponding slide 24, and vice versa.
  • each of the slides 24 has a rack 36 fixed thereto such that the rack 36 extends in the vertical direction.
  • a synchronizer pinion 38 is held in meshing engagement with the two racks 36.
  • this synchronizer pinion 38 is mounted on a rotary shaft 40 which is rotatably supported by the spacer block 20 through bearings 42.
  • the distance between the two flat dies 28 is determined so be slightly smaller than the diameter of a cylindrical workpiece W whose outer circumferential surface is shaped at one of its opposite end portions, by and between the flat dies 28. Described more specifically, the workpiece W is supported at its opposite axial ends by respective centers supported by respective center holders 44, 46 such that the workpiece W is rotatable about its axis which is aligned with the axis of rotation of the pinion 38. The end portion of the workpiece W to be shaped is squeezed and rolled on the outer circumferential surface between the two flat dies 28 while the flat dies 28 are reciprocated in synchronization with each other.
  • the center holder 44 is disposed axially movably by a pushing hydraulic cylinder (not shown), to push the workpiece W for forcing the end portion in between the two flat dies 28.
  • the other center holder 46 extends axially slidably through the rotary shaft 40, and is connected to a retracting hydraulic cylinder (not shown) which is activated in synchronization with the pushing hydraulic cylinder, so that the center holder 46 is retracted or pulled as the center holder 46 is advanced or pushed by the pushing hydraulic cylinder. Namely, the center holders 44, 46 are moved while the flat dies 28 are reciprocated to axially move the workpiece W while it is squeezed and rolled between the flat dies 28.
  • the axial movement of the workpiece W by the pushing and retracting cylinders permits the workpiece W to be rolled over a relatively large axial length, even though the dimension of the flat dies 28 in the axial direction of the workpiece W is relatively small.
  • the flat dies 28 are designed to form a spline at one axial end portion of the workpiece W.
  • the flat dies 28 receive respective components of a rolling reaction force in opposite directions away from each other toward the two frame members 14. These components of the rolling reaction force are transferred from the flat dies 28 to the respective frame members 14 through the respective die holders 30 and the respective slides 24. More specifically described, the two frame members 14 are disposed such that the pair of flat dies 28 are interposed between the two frame members 14, so that the frame members 14 receive from the respective flat dies 28 the respective components of the rolling reaction force which are transferred from the workpiece W.
  • the rolling reaction force is received by a relatively large area of the bearing surface of each of the guide rails 22 on which the respective slides 24 are slidably mounted.
  • the rolling reaction force thus received by the two frame members 14 acts on the mutually corresponding longitudinally intermediate portions of the frame members 14 in the opposite directions away from each other in the direction in which the frame members 14 are spaced apart from each other.
  • the two spacer blocks 18, 20, which are interposed between the longitudinally intermediate portions (vertically intermediate portions as seen in Fig. 1) of the frame members 14, as indicated above and 3, are located at the widthwise opposite end portions of each frame member 14, respectively, as shown in Figs. 2 and 3, such that the two slides 24 are located between the two spacer blocks 18, 20 in the second horizontal direction which is the direction of width of the frame members 14.
  • the two frame members 14 and the two spacer blocks 18, 20 are fastened together by the four long tie bolts 48 extending these frame members 14 and spacer blocks 18, 20, as shown in Figs. 1, 3 and 4.
  • the two tie bolts 48 extend through the spacer block 18 while the other two tie bolts 48 extend through the other spacer block 20, as shown in Fig. 4, such that the two tie bolts 48 extending through each of the spacer blocks 18, 20 are located one above the other, as indicated in Fig. 4.
  • Each of the tie bolts 48 has a hexagon head 48a at one of its opposite ends, and a threaded end portion 48b at the other end, as shown in Fig. 3.
  • a nut 50 is screwed on the threaded end portion 48b, for thereby forcing the two frame members 14 against the opposite end faces of the corresponding spacer block 18, 20.
  • the tie bolts 48 serving as the tightening rod members cooperate with the nuts 50 and the spacer members 18, 20 to constitute a fastening device for fastening the frame members 14 for protecting the longitudinally intermediate portions of the frame members 14 against the rolling reaction force.
  • the four tie bolts 48 extend through holes which are formed through the frame members 14 and the spacer blocks 18, 20 in the first horizontal direction in which the frame members 14 are spaced apart from each other.
  • the tie bolts 48 and the nuts 50 apply a tightening force to the frame members 14 such that the frame members 14 are forced against the spacer members 18, 20 in the opposite directions toward each other in the above-indicated first horizontal direction, so that the tightening force resists the rolling reaction force which acts on the frame members 14 in the direction opposite to the tightening force.
  • the tightening force applied by the tie bolts 48 and the nuts 50 serves to prevent or minimize the outward deflection of the two frame members 14 in the directions away from each other and from the flat dies 28 and the workpiece W.
  • the tightening force given by the tie bolts 48 and the nuts 50 is larger than the expected rolling reaction force received from the flat dies 28, so that the frame members 14 are kept forced against the opposite end faces of the spacer blocks 18, 20 even while the rolling reaction force is generated in the rolling process.
  • each tie bolt 48 has a longitudinally extending hole 52 for accommodating a suitable heater which is activated or turned on to generate heat for heating the tie bolt 48.
  • the heater may be an electrically resistive heating wire coated with an electrically insulating material.
  • the heater is inserted into the hole 52 formed through the tie bolt 48, and is turned on to generate heat for heating the tie bolt 48 so that the tie bolt 48 is elongated in its longitudinal direction by thermal expansion by the heat.
  • the nut 50 is tightened on the threaded end portion 48b of the tie bolt 48 with the nut 50 being forced against the outer surface of the other frame member 14, as also shown in Fig. 3.
  • the heaters accommodated in the holes 52 of the tie bolts 48 are turned off or de-energized, to allow the tie bolts 48 to be air-cooled to the ambient temperature, so that the tie bolts 48 are contracted in the longitudinal direction.
  • the tightening force larger than the rolling reaction force is generated by the tie bolts 48.
  • the amount of this tightening force generated by thermal contraction of the tie bolts 48 is extremely larger than that generated by the conventional tie bar device.
  • the tightening force generated by each tie bolt 48 may amount to at least several tens of tons, and the total tightening force generated by the four tie bolts may amount to at least a few hundreds of tons, as described below in detail.
  • the accuracy of rolling on the workpiece W namely, the dimensional accuracy of the rolled product obtained by rolling the workpiece W is considerably influenced by the outward deflection of the frame members 14 at their longitudinally intermediate portions.
  • the fastening device constructed according to the present embodiment of this invention assures a significantly reduced amount of deflection of the separate frame members 14, owing to the sufficiently large tightening force by which the frame members 14 can be held forced against the spacer blocks 18, 20 in the opposite directions toward each other, even while the rolling reaction force acts on the frame members 14 in the opposite directions away from each other. Accordingly, the rigidity of the rolling machine is significantly increased by the present fastening device, and the outward deflection of the frame members 14 is reduced to such an extent as in an arrangement wherein the frame members are parts of an integral frame structure.
  • the increased rigidity of the rolling machine provided by the present fastening device appears to be based on a fact which will be described.
  • a tensile force Pi acting on the tie bolt 48 is equal to a compressive force Pi acting on the spacer block 18, with the tensile force Pi acting in the opposite directions away from each other while the compressible force Pi acting in the opposite directions toward each other, as indicated at (a) in Fig. 5.
  • the tensile or compressive force Pi is considered to be the tightening force when the rolling reaction force is not applied to the frame members 14.
  • the amount Pb of increase of the tensile force acting on the tie bolt 48 upon application of the rolling reaction force P to the tie bolt 48 is not be equal to the entire amount of the rolling reaction force P, but is equal to a fraction of the force P as calculated according to the above equation (4).
  • P 0
  • the spacer block 18 were not provided, that is, if the frame members 14, 14 were connected to each other by a suitable tie bar device, the entirety of the rolling reaction force P would act on the tie bar as P2, and the amount of elongation of the tie bar would be equal to ⁇ 2, which is considerably larger than the elongation amount ⁇ .
  • the elongation amount ⁇ 2 is the total amount of outward deflection of the two frame members 14, 14, that is, an amount of increase of the distance between the two flat dies 28 in the direction in which the frame members 14 are spaced apart from each other.
  • the fastening device 18, 20, 48, 50 according to the present embodiment permits a significant reduction in the amount of increase of the distance between the flat dies 28, thereby assuring an accordingly increased degree of accuracy of rolling operation in the flat-die type rolling machine 10.
  • the fastening device 18, 20, 48, 50 is effective particularly where a rolling operation on the workpiece W is performed while the workpiece W is axially fed by the pushing and retracting hydraulic cylinders connected to the center holders 44, 46 as described above.
  • the rolling operation is effected over a relatively large axial length of the workpiece W, and the rolling reaction force tends to be large.
  • the present fastening device permits a reduced variation in the dimensional accuracy of the rolled product, namely, an improved dimensional accuracy on the order of several microns, even where the rolling reaction force is considerably large.
  • the reduced amount of outward deflection of the frame members 14 by the large tightening force generated by contraction of the tie bolts 48 after their elongation by heating assures accordingly reduced amounts of vibration of the frame members 14 and resulting noise, which would take place due to pulsation of the rolling reaction force.
  • An experiment conducted by the present inventor showed the rolling noise of 75 db. or lower on the present rolling machine 10, which is considerably lower than the rolling noise of 80 db. on the conventional rolling machine.
  • the fastening device 18, 20, 48, 50 gives the frame members 14 a sufficiently high degree of rigidity for assuring the rolling accuracy on the order of several microns, the required mass of the frame members 14 can be considerably reduced, with a relatively small transverse cross sectional area, thereby permitting a reduction in the size of the rolling machine 10 as a whole.
  • the amount of elongation ⁇ of the tie bolts 48 can be reduced as long as the spacer blocks 18, 20 are held elastically compressed by the tightening force generated by the tie bolts 48. Although this does not require the tie bolts 48 to generate the original tightening force Pi larger than the rolling reaction force P, the original tightening force Pi is required to be determined so that the spacer blocks 18, 20 are held compressed even when the rolling reaction force P is applied to the tie bolts 48.
  • the tie bolt 48 has an outside diameter D1 (Fig. 3) of 8cm and an inside diameter D2 (Fig. 3) of 2cm, the cross sectional surface area A is about 47.1cm 2 .
  • the total tightening force Pi generated by the four tie bolts 48 is 339.12tons.
  • the tightening force generated by one tie bar is about 25tons, so that the total tightening force if the tie bar device has four tie bars is about 100tons.
  • the tightening force generated by the fastening device 18, 20, 48, 50 in the above specific example is more than three times the tightening force generated by the conventional tie bar device.
  • the amount of elongation of each tie bolt 48 is about 0.06cm, which is about 0.0857% of the distance l of 70cm.
  • the amount of elongation of the tie bolt 48 is desirably selected within a range of about 0.05-0.15% of the distance l, preferably, within a range of about 0.06-0.12% of the distance l, and more preferably within a range of about 0.08-0.10% of the distance l.
  • the sliders 24 on which the flat dies 28 are mounted are adapted to be reciprocated in the vertical direction, the flat dies 28 may be reciprocated in the horizontal direction. While the two slides 24 are reciprocated by the respective reciprocating hydraulic cylinders 32, only one of the slides 24 may be reciprocated relative to the other stationary slide 24.
  • the illustrated embodiment is adapted such that the workpiece W is fed in the axial direction as the flat dies 28 are reciprocated repeatedly, the principle of the present invention is applicable to a flat-die type rolling machine adapted to roll a workpiece by one movement of at least one of two flat dies in one direction.

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  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
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  • Presses And Accessory Devices Thereof (AREA)

Claims (13)

  1. Flachbackenrollmaschine mit einem Paar von flachen Backen (28), die relativ und parallel zueinander bewegbar sind, um dazwischen ein Werkstück (W) zusammenzudrücken und zu rollen, um eine äußere Umfangsfläche des Werkstücks zu formen, und einem Paar von verlängerten Rahmenelementen (14), die sich parallel zueinander in einer ersten Richtung und voneinander beabstandet in einer zweiten Richtung senkrecht zu der ersten Richtung erstrecken, so dass das Paar von flachen Backen zwischen das Paar von verlängerten Rahmenelementen in der zweiten Richtung eingefügt ist, wobei das Paar von verlängerten Rahmenelementen an gegenüberliegenden Längsendabschnitten von diesen miteinander verbunden ist und angeordnet ist, um jeweils von dem Paar von flachen Backen entsprechende Rollreaktionskräfte aufzunehmen, welche von dem Werkstück zu dem Paar von flachen Backen in entgegengesetzten Richtungen voneinander weg in der zweiten Richtung übertragen werden,
    ferner mit
    einer Befestigungseinrichtung (18, 20, 48, 50), die mindestens ein Abstandselement (18, 20), das zwischen einander entsprechende Längs-Zwischenabschnitte des Paars von verlängerten Rahmenelementen (14) eingefügt ist, und mindestens ein Spann-Stabelement (48) enthält, dadurch gekennzeichnet, dass jedes der mindestens einmal vorhandenen Stabelemente ein sich längs erstreckendes Loch (52) zur Unterbringung einer Heizeinrichtung hat und auf das Paar von verlängerten Rahmenelementen eine Spannkraft derart aufbringt, dass die verlängerten Rahmenelemente gegen das mindestens eine Abstandselement in entgegengesetzten Richtungen aufeinander zu in der zweiten Richtung gedrückt werden, wobei die Spannkraft als ein Ergebnis der Verlängerung des mindestens einen Spann-Stabelements durch dessen Erwärmung mittels der Heizeinrichtung und die nachfolgende Zusammenziehung des mindestens einen Spannelements durch dessen Kühlung erzeugt wird.
  2. Flachbackenrollmaschine gemäß Anspruch 1, bei welcher jedes der mindestens einmal vorhandenen Spann-Stabelemente ein Bolzenelement (48) ist, das sich durch das Paar von verlängerten Rahmenelementen (14) und eines der mindestens einmal vorhandenen Abstandselemente (18, 20) erstreckt, wobei das Bolzenelement an einem von seinen entgegengesetzten Enden einen Kopf (48a), zum Kontakt mit einem von dem Paar von verlängerten Rahmenelementen, und einen mit Gewinde versehenen Endabschnitt (48b), beabstandet von dem Kopf, hat, wobei die Befestigungseinrichtung ferner eine Mutter (50) enthält, welche mit dem mit Gewinde versehenen Endabschnitt des Bolzenelements in Eingriff ist, um mit einem von dem Paar von verlängerten Rahmenelementen in Kontakt gebracht zu werden, wenn das Bolzenelement durch seine Erwärmung mittels der Heizeinrichtung verlängert worden ist.
  3. Flachbackenrollmaschine gemäß Anspruch 1 oder 2, bei welcher mindestens ein Abstandselement aus zwei Abstandselementen besteht, welche in einer dritten Richtung senkrecht zu der ersten und zweiten Richtung voneinander beabstandet sind, und das mindestens eine Spann-Stabelement zwei Stabelemente (48) enthält, welche sich jeweils durch die zwei Abstandselemente erstrecken.
  4. Flachbackenrollmaschine gemäß Anspruch 3, bei welcher das mindestens eine Spann-Stabelement aus vier Stabelementen (48) besteht, die aus zwei Stabelementen, die sich durch eines der zwei Abstandselemente erstrecken und in der ersten Richtung voneinander beabstandet sind, und zwei Stabelementen bestehen, die sich durch das andere der zwei Abstandselemente erstrecken und in der ersten Richtung voneinander beabstandet sind.
  5. Flachbackenrollmaschine gemäß einem der Ansprüche 1-4, bei welcher jedes der mindestens einmal vorhandenen Spann-Stabelemente (48) aus einem Material ausgebildet ist, welches gestattet, dass jedes Spann-Stabelement, das durch dessen Erwärmung um einen Betrag gleich 0,05-0,15% eines Abstands zwischen äußeren Flächen des Paars von verlängerten Rahmenelementen zu verlängern ist, mit welchen das mindestens eine Spann-Stabelement verbunden ist, um die Spannkraft aufzubringen.
  6. Flachbackenrollmaschine gemäß Anspruch 5, bei welcher der Betrag 0,06-0,12% des Abstands ist.
  7. Flachbackenrollmaschine gemäß Anspruch 6, bei welcher der Betrag 0,08-0,10% des Abstands ist.
  8. Flachbackenrollmaschine gemäß einem der Ansprüche 5-7, bei welcher das Material ein Chrom-Molybdän-Stahl ist.
  9. Verfahren, um das Paar von verlängerten Rahmenelementen (14) und das mindestens eine Abstandselement (18, 20) in der in Anspruch 1 definierten Flachbackenrollmaschine aneinander zu befestigen,
    dadurch gekennzeichnet, dass es die Schritte aufweist:
    Platzieren mindestens eines Spann-Stabelements (48) an der Flachbackenrollmaschine, in Verbindung mit dem Paar von verlängerten Rahmenelementen (14) und dem dazwischen eingefügten mindestens einen Abstandselement (18, 20);
    Platzieren einer Heizeinrichtung in dem sich längs erstreckenden Loch (52) jedes der mindestens einmal vorhandenen Spann-Stabelemente, und Einschalten der Heizeinrichtung, um jedes Spann-Stabelement zu erwärmen, um zu bewirken, dass jedes Spann-Stabelement verlängert wird;
    Fixieren jedes Spann-Stabelements, nachdem jedes Spann-Stabelement verlängert worden ist, so dass eine Spannkraft auf das Paar von verlängerten Rahmenelementen derart aufgebracht wird, dass die verlängerten Rahmenelemente gegen das mindestens eine Abstandselement in den entgegengesetzten Richtungen aufeinander zu in der zweiten Richtung gedrückt werden, nachdem jedes Spann-Stabelement durch seine Abkühlung zusammengezogen worden ist; und
    Ausschalten der Heizeinrichtung, um die Abkühlung und Zusammenziehung des Spann-Stabelements zu gestatten, um die Spannkraft auf das Paar von verlängerten Rahmenelementen aufzubringen.
  10. Verfahren gemäß Anspruch 9, bei welchem der Schritt des Platzierens des mindestens einen Spann-Stabelements die Positionierung von mindestens einem Bolzenelement (48) derart aufweist, dass sich jedes der mindestens einmal vorhandenen Bolzenelemente durch das Paar von verlängerten Rahmenelementen und das mindestens eine Abstandselement erstreckt, und dass ein Kopf jedes Bolzenelements, der an einem von entgegengesetzten Enden von diesem vorgesehen ist, in Kontakt mit einem des Paars von verlängerten Rahmenelementen ist, und der Schritt des Fixierens jedes Spann-Stabelements das Schrauben einer Mutter auf einen mit Gewinde versehenen Endabschnitt jedes Bolzenelements beabstandet von dem Kopf, in Kontakt mit dem anderen des Paars von verlängerten Rahmenelementen aufweist, wenn jedes Bolzenelement durch seine Erwärmung mittels der Heizeinrichtung verlängert worden ist.
  11. Verfahren gemäß Anspruch 9 oder 10, bei welchem der Schritt des Platzierens einer Heizeinrichtung in dem sich längs erstreckenden Loch (52) und des Einschaltens der Heizeinrichtung das Halten der Heizeinrichtung in einem eingeschalteten Zustand aufweist, bis jedes Spann-Stabelement um einen Betrag gleich 0,05-0,15% einer Strecke zwischen äußeren Flächen des Paars von verlängerten Rahmenelementen (48) verlängert worden ist, mit welchen das mindestens eine Spann-Stabelement verbunden ist, um die Spannkraft aufzubringen.
  12. Verfahren gemäß Anspruch 11, bei welchem der Betrag 0,06-0,12% der Strecke ist.
  13. Verfahren gemäß Anspruch 12, bei welchem der Betrag 0,08-0,10% der Strecke ist.
EP19990114437 1999-07-22 1999-07-22 Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür Expired - Lifetime EP1072337B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES99114437T ES2217653T3 (es) 1999-07-22 1999-07-22 Maquina de laminar del tipo de matrices planas que tienen un dispositivo para fijacion de miembros de bastidor de soporte de matrices y metodo de sujecion de los mismos.
DE69915813T DE69915813T2 (de) 1999-07-22 1999-07-22 Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür
EP19990114437 EP1072337B1 (de) 1999-07-22 1999-07-22 Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür

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EP19990114437 EP1072337B1 (de) 1999-07-22 1999-07-22 Flachbackenwalzmaschine mit Vorrichtung zum miteinander Verbinden der Backentragrahmen und Befestigungsverfahren hierfür

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US10722934B2 (en) 2016-08-26 2020-07-28 Vey Manufacturing Technologies LLC Thread rolling assembly
US11351621B2 (en) 2018-08-27 2022-06-07 Vey Manufacturing Technologies LLC Positioning and clamping system for thread rolling
WO2020046486A1 (en) 2018-08-27 2020-03-05 Vey Manufacturing Technologies LLC Positioning and clamping system for thread rolling

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Publication number Priority date Publication date Assignee Title
US2176601A (en) * 1937-07-27 1939-10-17 Westinghouse Electric & Mfg Co Bolt heater
US3130628A (en) * 1958-10-06 1964-04-28 Moeller & Neumann Gmbh Arrangement for elongating a stay bolt means or tension anchor independently of nut means associated therewith
JPS5327949Y2 (de) * 1974-01-22 1978-07-14
JPS59174240A (ja) * 1983-03-22 1984-10-02 O S G Kk 転造成形方法および装置
US4622730A (en) * 1984-03-30 1986-11-18 Rolf Steinbock Apparatus to mechanically stress a bolt-type fastener
SU1555005A1 (ru) * 1988-05-30 1990-04-07 Краматорский Индустриальный Институт Предварительно напр женна станина прокатной клети
US4991563A (en) * 1989-06-06 1991-02-12 Ashley Royce C Apparatus and method for heating hollow bolts
JP2860040B2 (ja) * 1993-05-28 1999-02-24 株式会社シイエヌケイ タイバーを備えた転造装置

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