Abstract: A rolling mill for solid elongated products, defining a rolling axis, including first and second rolling stations. Each station includes a load-bearing structure, a removable roll-holder cartridge with three rolling rolls movable radially and rotating around spaced rotational axes, and a roll having a vertical rotational axis. A system synchronizes mechanical adjustment of the rolls. Three actuators mount on the load-bearing structure; three gear motor groups connect to the rolls by single extensions. The second station rolls are rotated 60° from the first stations. The rolls with a vertical axis of the first and second stations are arranged on opposite sides of the rolling axis. All rolling stations allow lateral extraction of roll-holder cartridges from the same side of the rolling mill. The stations on the extraction side have actuators movable relative to the load-bearing structure. The stations with vertical rolls arranged on the opposite side have fixed actuators.

Abstract: A method for detecting a faulty cooling unit in a set of cooling units configured to provide a coolant to work rolls arranged to process a work item therebetween, the method including: varying the flow rates of the coolant ejected from a sub-set of the cooling units; in response to varying the flow rates, determining a flatness variation value of the work item for at least each of the cooling units in the sub-set of cooling units, the flatness variation value being indicative of the work item flatness variation downstream of the work rolls; and detecting a faulty cooling unit based on comparing the flatness variation values to a reference flatness variation value.

Abstract: Machine to work oblong metal products, including a drawing apparatus to feed at least one of said metal products in a direction of feed and a work apparatus aligned in said direction of feed. The drawing apparatus includes a first drawing unit and a second drawing unit opposite each other with respect to said direction of feed. The first drawing unit and the second drawing unit define between them, in said direction of feed, a drawing channel for the at least one metal product. The drawing channel has a lying plane, defined by a plurality of anchoring inserts, for the at least one metal product, a supply apparatus being possibly present upstream of said drawing apparatus.

Abstract: A method for producing a profiled hollow shaft for a telescopic steering shaft of a motor vehicle may involve providing a hollow shaft to be processed, a profile mandrel, and a roller head comprising at least one roller. The method may further involve introducing the profile mandrel into the hollow shaft in order to produce a groove in the hollow shaft. The method may also involve moving the profile mandrel and the hollow shaft together relative to the roller head, wherein movement of the profile mandrel and the hollow shaft relative to the roller head is performed exclusively in a direction of a longitudinal axis of the hollow shaft in order to form a groove.

Abstract: One aspect of the invention concerns a metallic bar or post (15) comprising a longitudinal axis; a spine (16) extending along the longitudinal axis; and at least three interconnected arms (17-19), each of which extends along the spine (16) and generally radially from the spine (16), with a free end (20-22) of each said arm (17-19) being tapered in the direction of the free end (20-22) to the spine (16). Other aspects of the invention concern a roll stand and rolling mill for forming the bar or post (15).

Abstract: A roll-holder cartridge for a three-tube rolling stand with means adapted to release a tube during rolling in case of emergency. The roll-holder cartridge (3) has on both side walls a substantially Y-shaped opening (10) laying with the foot at the vertical axis yoke support so as to be able to pull out the roll-holder cartridge according to a direction coinciding with the horizontal axis of the vertical axis yoke while leaving the support hanging from the fixed structure (13) of the rolling stand. In case of normal maintenance operation, the cartridge (3) is pulled out sideways from the structure of the rolling mill with the yoke support of the vertical axis roll anchored to the cartridge itself, like the other supports of the rolls.

Abstract: A method and a device for releasing a tube during a rolling process in a three-roll rolling stand in case of an emergency. The roll holder cartridge (3) has a longitudinal open slot (10) at the yoke support of the vertical axis roll so as to remove the roll holder cartridge according to a direction coinciding with the horizontal axis of the yoke support of the vertical axis roll while the support remains anchored to the fixed structure in the stand of the roll mill. In case of routine maintenance, the cartridge (3) is pulled out laterally with the yoke support of the vertical axis roll anchored to the cartridge itself as the other roll supports.

Abstract: The invention relates to a method and device for producing conical sections in cylindrical pipes of screw-in foundations by drawing. The device comprises a plurality of press rolling disks (segments) disposed radially about a longitudinal axis of a receptacle for the cylindrical pipe to drawn, pivotable about axes extending transverse and tangential to the longitudinal axis and designed such that the outer circumferential surfaces of the press roller disks (segments) form a developed cone. The device further comprises a drawing die for drawing the pipe along the longitudinal axis through the press roller disks (segments), such that the conical section can be formed by means of the outer circumferential surfaces rolling on the pipe during drawing. Spring elements clamp the press roller disks (segments) against the pipe. A rotary device rotates the pipe for uniform processing thereof.

Abstract: The invention may relate, among other things, to a device for straightening a metal strip having two strip drives which are suitable together to apply tension on the metal strip to straighten the metal strip, wherein at least one of the strip drives is a linear drive, characterized in that the at least one linear drive has a positioning device such that the linear drive can be moved relative to the longitudinal axis of the device.

Abstract: A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules being firmly fixed to the external structure of the rolling mill and providing for the side change of the rolls of each stand. The arrangement of rolling rolls and related extensions of each rolling mill stand is such to avoid problems of corrosion and damaging to the extensions themselves and to the reducers due to the drainage of the cooling waters.

Abstract: A roll-holder cartridge for a three-tube rolling stand with means adapted to release a tube during rolling in case of emergency. The roll-holder cartridge (3) has on both side walls a substantially Y-shaped opening (10) laying with the foot at the vertical axis yoke support so as to be able to pull out the roll-holder cartridge according to a direction coinciding with the horizontal axis of the vertical axis yoke while leaving the support hanging from the fixed structure (13) of the rolling stand. In case of normal maintenance operation, the cartridge (3) is pulled out sideways from the structure of the rolling mill with the yoke support of the vertical axis roll anchored to the cartridge itself, like the other supports of the rolls.

Abstract: A method of manufacturing large diameter tapered roller bearing cages includes beginning with a metal strip, coil or plate of cage blank material and feeding it into a rolling mill. The rolling mill includes a pair of unparallel forming rolls disposed to define a wedge-shaped gap therebetween. As the cage blank material is fed through the wedge-shaped gap, one lateral side of the cage blank material is plastically deformed to reduce its thickness and to elongate its length, while slight or no deformation is introduced into the other lateral side, thus forming the cage blank into an arc shape. A third roll disposed at the exit side of the forming rolls bends the rolled cage blank into a circular conical ring. Adjacent butt ends of the formed conical ring cage blank are aligned and joined together during the assembly process to form the large diameter tapered roller bearing cage.

Abstract: It is a primary object of the present invention to provide a pre-stressed rolling mill which has the advantages of a conventional mono-block mill housing and utilizes a standard Cluster mill gauge eccentric bearing gauge control system. It is highly desirable to have a rolling mill with a low cost mill housing design, a high mill stiffness, a simplified gauge control system, a capacity for multiple work roll ranges, and satisfactory side to side tilting. Such a mill is capable of operating satisfactorily as a commercial temper mill and a commercial cold mill.

Abstract: In order to simplify roll adjustment in a roll stand when changing the rolls, a roll stand absorbs rolling forces of at least three rolls mounted on both sides in bearing seats of the roll stand that absorb rolling forces, in each instance. At least the bearing seats of one roll are disposed in a stand body jointly with a bearing seat of another roll, in each instance. One of the stand bodies has fixed bearings of the two related rolls, in each instance, and/or one of the stand bodies has floating bearings of the two related rolls, in each instance.

Abstract: A rolling system, particularly a cold-rolling system for cold-rolling a metal strip (2): having at least one cold-rolling stand (1) an unwinding device (3) upstream of the cold-rolling stand (1), a unit (10) connected between the unwinding device (3) and the cold-rolling stand (1), including at least three rolls (6, 7, 8) each rotationally driven about a rotational axis (6A, 7A, 8A). Each roll (6, 7, 8) can be adjusted individually or together in the direction of the respective rotational axis (6A, 7A, 8A) and in a direction transverse to the rotational axis (6A, 7A, 8A) by a driving and adjusting device (11).

Abstract: A device for configuring foil for use in cooking food comprising: a base portion; a first plurality of rotatable elements operatively associated with the base portion; a support mounted on the base portion; and a second plurality of rotatable elements operatively associated with the support; the support operating to pivot relative to the base portion so as to allow entry of foil between the first and second plurality of rotatable elements in a first position and engagement of the first and second plurality of rotatable elements in a second position; whereby in the second position the first and second plurality of rotatable elements impart a configuration to the foil.

Abstract: A squeeze roll stand includes a combination of a fixed portion installed at a joint position of an electric resistance welded pipe manufacturing line, in which squeeze rolls excluding left and right upper rolls are detachably assembled, and a movable portion overlying the fixed portion, inside which left and right upper rolls are detachably assembled, the movable portion being inclined, taking a back surface downstream side as a fulcrum point, toward a same side from an assembling position on the fixed portion to a retreat position to open an upper part of the fixed portion. The movable portion is driven and reciprocated between the assembling position and the retreat position with cylinder type actuators as a drive mechanism. At the retreat position, the movable portion overlies a bead grinding device arranged on the back surface downstream side of the fixed portion with a front surface facing upward.

Abstract: A contoured roller set and associated systems and methods are disclosed herein. A male roller having a convex surface and a pair of female rollers each having a concave surface can receive a generally thin sheet of material and impart a doubly-curved shape to the sheet. The convex and concave surfaces of the male and female rollers can have a radius of curvature chosen to match a radius of curvature of the sheet of material. The rollers are positioned and shaped to urge the sheet between the female rollers to cause the sheet to curve toward the male roller.

Abstract: The invention relates to a rolling mill defining a rolling axis and comprising rolling stations. At least one rolling station comprises a fixed structure, a roll-holder cartridge and three actuators. The cartridge is connected removably to the fixed structure and comprises three rolling rolls. The rolls are movable radially and rotatable about three respective axes. Three actuators of the single-stroke type are mounted on the fixed structure and comprise pistons movable along respective radial axes to impart a force on the rolls for rolling an article. Three gearmotors provide the rolls, by means of spindles, with the torque for feeding the article along the rolling axis. When two pistons are completely retracted, a path is created free from obstacles allowing the cartridge to pass out laterally. Then, one spindle may be subject to a rotation-translation to be removed from the path, the respective gearmotor being fixed on its base.

Abstract: A method for manufacturing a roll for reducing rolling capable of suppressing the occurrence of fin flaws and edge flaws includes preparing a roll for reducing rolling for use on a three-roll type reducing-rolling mill. A ridge part (52) is formed in the adjacent portion between a caliber part and a flange part is rounded by cutting the ridge part (52) while rotating the roll for reducing rolling around the roll axis. In rounding the ridge part, in a ridge part region (RA52) within the range of 3.0 mm in a roll axis direction with the top of the ridge part (52) being the center, the average of radiuses of curvature measured at a 0.5 mm pitch is made in the range of 2.5 to 3.0 mm, and the difference between the maximum value and the minimum value of the radiuses of curvature is made at most 1.0 mm.

Abstract: A multi-roll mandrel mill comprises a plurality of grooved roll bodies as a roll pass for elongation rolling of a shell and a plurality of roll stands, each having roll shafts and roll chock portions for driving the grooved roll bodies for driving the grooved roll bodies, wherein bearings are internally contained in each grooved roll body. Optimizing the design of roll chock portions for every setup is achieved by a tube-making setup of the mandrel mill, wherein at least one of either or both of the roll shafts and the roll chock portions is replaced with a part(s) having a different shape(s) in addition to changing of the grooved roll bodies. The optimization of the design is effective in preventing underfill and overfill.

Abstract: The present invention provides a mandrel mill and the like that is capable of not only enhancing the elongation ratio of the pipe or tube, but also suppressing a pinhole defect from occurring. The first means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which two grooved rolls R11, R12 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 4.6 or over. The second means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which three grooved rolls R21, R22 and R23 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 2.8 or over.

Abstract: A mandrel mill a method for manufacturing a seamless pipe by using the mandrel mill includes a plurality of roll stands in which three grooved rolls R are disposed in each roll stand such that an angle formed by pressing directions is 120° and the pressing directions of the grooved rolls R are alternately shifted by 60° between adjacent roll stands, wherein a central angle ? defining a circular arc that constitutes a groove bottom profile of the grooved roll R disposed at least in the first and second roll stands is set at less than 60°. The mandrel mill can adequately suppress the problem of the mandrel bar not being able to be pulled out from a pipe after drawing and rolling, without resulting in an increase in facility cost and deterioration of maintainability.

Abstract: A system for forming bends in a portion of a tubular work piece includes a roller assembly having rollers. The work piece is supported such that the portion thereof is aligned with the rollers along an axial direction, and such that the work piece can be advanced in the axial direction. At least some of the rollers are guided along a path around the perimeter of the work piece, such that a pressure exerted by the rollers on the work piece increases from a minimum value to a maximum value along a first half of the path and decreases from the maximum value to approximately the minimum value along a second half of the path. The system includes an adjuster assembly for moving the roller guide structure along a direction that is inclined relative to the axial direction, for varying the maximum value of the applied pressure.

Abstract: The invention relates to a device for feeding long workpieces into a processing machine, such as a bend-straightening machine, and discharging them therefrom, in which the long workpiece which is located in the processing positions defines a processing section and the long workpiece is supported at its two end regions by, in each case, one grasping device. A horizontal conveying means for the long workpiece adjoins at least one head end of the processing section as a straight prolongation of the processing section. At least one of the grasping devices has a gripping head for gripping in a frictionally locking fashion one end of the workpiece which is conveyed here by the horizontal conveying means, and drive means for pulling the workpiece to be straightened into the processing section and for pushing the straightened workpiece out onto the at least one horizontal conveying means by means of the gripping head.

Abstract: A hot-rolling plant (50) for the production of metal strips comprising a roughing stand (2), a reheating furnace (3) or a maintenance tunnel for maintaining the temperature of the product, a pre-finishing mill train (4), comprising three or four stands, a finishing mill train (5), comprising two or three stands, for finishing the product, in which the work rolls of one stand are provided with their own motor drive, independent one from each other, so as to allow the peripheral speeds of both of said work rolls to be autonomously varied under rolling load.

Abstract: The present invention relates to a rolling mill 20 which defines a rolling axis X and comprises at least two rolling stations 22. At least one rolling station comprises a fixed structure 40, a roll-holder cartridge 24 and three actuators 32. The cartridge is connected removably to the fixed structure and comprises three rolling rolls 26. The rolls are movable radially and rotatable about three respective axes arranged at 120° from each other. The three actuators are mounted on the fixed structure and comprise pistons 50 movable along respective radial axes t arranged at 120° from each other. Each of the actuators is able, during use, to act on one of the rolls so as to impart a radial force suitable for rolling the article 44.

Abstract: A rolling stand is provided for producing a rolled strip having working rolls which are supported on supporting rolls or intermediate rolls and supporting rolls, wherein the working rolls and/or intermediate rolls and/or supporting rolls are arranged in the rolling stand so as to be displaceable axially relative to one another, and each roll of at least one roll pair formed from a supporting roll and a working roll or from a supporting roll and an intermediate roll has a curved contour which runs over the entire effective barrel length, wherein the contour of the supporting roll is predefined by a contour function which is formed from a superposition of a first contour function, which runs in a manner complementary to the adjacent working roll in a non-displaced state, with a superposition function which is concave or convex in relation to the supporting roll axis.

Abstract: It is a primary object of the present invention to provide a pre-stressed rolling mill which has the advantages of a conventional mono-block mill housing and utilizes a standard Cluster mill gauge eccentric bearing gauge control system. It is highly desirable to have a rolling mill with a low cost mill housing design, a high mill stiffness, a simplified gauge control system, a capacity for multiple work roll ranges, and satisfactory side to side tilting. Such a mill is capable of operating satisfactorily as a commercial temper mill and a commercial cold mill.

Abstract: A multi-roll mandrel mill for compacting of roll chock portions has a plurality of grooved roll bodies as a roll pass which performs a reduction rolling of a shell, and a plurality of roll stands each having backup rolls for driving the grooved roll bodies, wherein bearings are internally contained in the grooved roll body. A multi-roll mandrel mill for optimizing the design of roll chock portions for every setup has a plurality of grooved roll bodies as a roll pass which performs the reduction rolling of a shell and a plurality of roll stands each having roll shafts and roll chock portions for driving the grooved roll bodies. According to a tube-making setup of the mandrel mill, at least one of either or both of the roll shafts and the roll chock portions is replaced with a part(s) having a different shape(s) in addition to the grooved roll bodies.

Abstract: This invention relates to a rolling mill apparatus and a method of shape control of a rolled strip which enables satisfactory shape control even in extremely thin rolling. A rolling mill apparatus of this invention has a rolling mill, which rolls a rolled strip P between upper and lower work rolls; a shape detecting portion, which detects the degree of flatness of the rolled strip in the width direction of rolled strip which has been rolled by the rolling mill; a spray portion, having a plurality of spray nozzles arranged along the length direction of the upper and lower work rolls, which sprays the upper and lower work rolls with coolant C; and, a shape control portion, which adjusts the spray amount and/or temperature of the coolant C sprayed from the spray portion based on detected information from the shape detecting portion, to control the shape of the rolled strip P.

Abstract: A mandrel mill is provided which can perform elongation rolling with a markedly increased working ratio and dimensional accuracy on a material which is inherently difficult to roll such as a hollow shell made of stainless steel or a thin-walled material. A mandrel mill for manufacturing a mother tube by performing elongation rolling of a hollow shell comprises a plurality of roll stands, having at least one 4-roll stand for wall thickness reduction of a hollow shell and at least one 2-roll stand including the final stand downstream of the 4-roll stand.

Abstract: A wire winding apparatus for winding a wire on a bobbin includes a forming device forming the wire having a rounded cross section to have a polygonal cross section and a winding device winding the wire formed by the forming device on the bobbin.

Abstract: A finishing monoblock for a billet lamination plant of the type comprises a plurality of lamination cages (G1Gn) arranged in sequence suitable for forming a lamination line and actuated by a pair of mechanical transmissions (22, 22?) actuated through at least one command reducer (23) for the lamination of the billet. According to the invention, said monoblock comprises at least one first module (M1) and a second module (M2?, M2?), of which at least one is disengageable from the lamination line through a pair of detachable joints (40).

Abstract: A method and apparatus is disclosed for refurbishing used metal banding of the type used to strap together bundles of items such as lumber. The method includes passing the used metal banding through a roller mill designed to guide and straighten the banding and to remove kinks formed where the banding previously was wrapped around corners or other protrusions of the bundle, recovering the straightened banding, and reusing the banding to strap other bundles of items. The apparatus includes a base containing an electric motor and a housing that encloses at least three rollers of the roller mill and special components that direct the banding in and out of the roller mill and expel it to be collected for reuse. The broad concept of the invention is the recovery, refurbishing, and reuse of used metal banding to band bundles of items for shipping.

Abstract: A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules being firmly fixed to the external structure of the rolling mill and providing for the side change of the rolls of each stand. The arrangement of rolling rolls and related extensions of each rolling mill stand is such to avoid problems of corrosion and damaging to the extensions themselves and to the reducers due to the drainage of the cooling waters.

Abstract: In the multi-high rolling mill according to the present invention, a pair of upper and lower work rolls for rolling material W is disposed; two upper first intermediate rolls and two lower first intermediate rolls are disposed outside the upper and lower work rolls respectively so as to contact with the work rolls; three upper rolls and three lower rolls are disposed outside the upper and lower first intermediate rolls respectively to contact with the first intermediate rolls. A second intermediate roll that is a center roll of the three rolls is functioned as a drive roll, and two rolls of the three rolls at both sides are functioned as first back-up rolls for supporting the first intermediate rolls. At least one upper second back-up roll and at least one lower second back-up roll are disposed outside the upper and lower second intermediate rolls respectively to support the second intermediate rolls.

Abstract: A contoured roller set and associated systems and methods are disclosed herein. A male roller having a convex surface and a pair of female rollers each having a concave surface can receive a generally thin sheet of material and impart a doubly-curved shape to the sheet. The convex and concave surfaces of the male and female rollers can have a radius of curvature chosen to match a radius of curvature of the sheet of material. The rollers are positioned and shaped to urge the sheet between the female rollers to cause the sheet to curve toward the male roller.

Abstract: A rolling mill, which can use work rolls of a smaller diameter for rolling a hard material and a thin strip material, and can decrease edge drops and improve surface gloss, is provided. For this purpose, a rolling mill, which includes upper and lower work rolls (2) as a pair for rolling a strip (1), upper and lower intermediate rolls (3) as a pair for supporting the upper and lower work rolls as the pair, and upper and lower back-up rolls (4) as a pair for supporting the upper and lower intermediate rolls as the pair, is configured such that the upper and lower work rolls as the pair are supported by a plurality of supporting bearings (8a to 8f and 9a to 9f) arranged vertically zigzag on an entry side in a rolling direction, and a plurality of supporting bearings (10a to 10f and 11a to 11f) arranged vertically zigzag on an delivery side in the rolling direction, at positions outward of a rollable strip width, and the plurality of supporting bearings lap over each other vertically.

Abstract: The invention relates to a rolling mill for tubes, in which a series of roll-holder containers (10) is housed in an external structure (2) extended along a rolling axis (L); the containers can slide inside the structure to be extracted therefrom and each one houses at least three rolls (17, 18, 19) controlled by respective driving motors (41, 42, 43). In accordance with the intervention the rolls (17, 18, 19) can be moved inside the containers (10) in a guided way along directions radial in relation to the rolling axis, in order to regulate the distance therefrom.

Abstract: The invention relates to a method and a tool for producing cylindrical workpieces having longitudinal grooves, wherein the actual rolling operation is preceded by a drawing stage integrated in the tool and wherein the forming rollers are realized with an improved mounting.

Abstract: An apparatus and corresponding manufacturing method for configuring a surgical needle such that the surgical needle has a barrel having a substantially elongate configuration and a point having a substantially curvilinear configuration are disclosed. First and second curving members having an axis of rotation are disposed adjacent and separated by a gap. Third and fourth curving members are slidably disposed in a path traversing the first and second curving members. When a surgical needle is inserted into the gap, the third and fourth curving members can be slid in the path to impose a holding force on the barrel of the needle and can be further slid in the path to cause curvature of the point of the needle by one of the first and second curving members. A corresponding method of manufacturing the needle having a curved point substantially without causing curvature of the barrel is also disclosed.

Abstract: A roll coupled to a separately manufactured axle rotates together with the axle in order to perform a rolling process. The roll includes an inner cylindrical surface, an outer cylindrical surface and both side faces, and at least one key way provided on at least one of the side faces is arranged adjacent to the inner cylindrical surface rather than said outer cylindrical surface, The key way is in a concave curved shape and is a portion of a spherical surface or of an ellipsoidal surface.

Abstract: A method of manufacturing a dry-type, resin-encapsulated transformer coil that includes forming a plurality of conductive layers and positioning a plurality of pre-formed plastic cooling ducts so as to be disposed between the conductive layers.

Abstract: A roll stand for rolling bar-shaped or tubular stock, having a stand housing, having at least one roll which is arranged on a roll shaft rotatably mounted in the stand housing and is connected in a rotationally fixed manner to the roll shaft via a frictional connection, in which roll stand the roll is held in its axial position on the roll shaft in a positive-locking manner by sleeve elements adjoining axially with respect to the roll shaft.

Abstract: The invention relates to a rolling mill for tubes, in which a series of roll-holder containers (10) is housed in an external structure (2) extended along a rolling axis (L); the containers can slide inside the structure to be extracted therefrom and each one houses at least three rolls (17, 18, 19) controlled by respective driving motors (41, 42, 43). In accordance with the intervention the rolls (17, 18, 19) can be moved inside the containers (10) in a guided way along directions radial in relation to the rolling axis, in order to regulate the distance therefrom.

Abstract: A saddle for a backing assembly in a rolling mill has non-cylindrical bearing surfaces that accommodate wear by allowing the saddles to self-align. The non-cylindrical bearing surfaces help prevent the needle bearings from being pinched and driven into the gear rings. The non-cylindrical bearing surfaces are provided in different locations such as intermediate the eccentric and eccentric ring or intermediate the eccentric ring and the saddle ring.

Abstract: The roll stand having at least one roll shaft 2, which carries a roll 6 and is subdivided into sectional shafts 3, 4 for the purpose of being able to change the roll, comprises at least one labyrinth-seal arrangement which is arranged in an annular gap 23, 24 formed between the respective sectional shaft 3, 4 and a bearing device for the roll shaft.

Abstract: A process of manufacturing a rail of a linear guide is described. The process includes preparing a material for a rail wherein the material has a surface formed in a convex shap and two side surface. The method includes a rolling process of forming raceway grooves in the side surfaces of the material and a process for making a mounting hole after the rolling process in such a manner that the mounting hole opens to at least either surface.

Abstract: A rolling mill for rolling or sizing of metallic pipes, bars and wires has a plurality of rolling units which are arranged on a straight line close to one another and can be exchanged in total, partly or individually, each of the rolling units having at least three rolls which are arranged in a star-like configuration around a rolling mill axis, drive shafts and motors each driving a respective one of the rolls in all the rolling units, a rolling unit housing provided for the rolling units, roll bearings provided for the rolls, and multi-part roll shafts provided for supporting the rolls so that the rolls can be exchanged without dismounting of the rolling unit housing and the roll bearings, the rolling units holding the rolls inside and outside of the rolling mill in their operational positions.