Abstract: A roll changing apparatus for rolling mills which is adapted for use in the manufacture of seamless steel pipes. The apparatus comprises a pair of sliding bases each mounted on a base block and movable parallel to each other, a plurality of roll carriages each containing a set of rolls, and means for moving the roll carriages, wherein two or more of the roll carriages are placed on each of the sliding bases and at least one of the roll carriages on each sliding base is moved forward to form a roll mill. When the roll carriages are to be changed, the forwardly moved roll carriages are moved back onto the sliding bases and then the other roll carriages are moved forward, thus automatically accomplishing the roll carriage changing in a short period of time.

Abstract: The invention relates to a two roll press having press rolls positioned side-by-side, the axes of which are mounted in bearing housings guided between parallel horizontal guiding surfaces in lateral frame members of the press frame, said guiding surfaces extending each to the ends of said frame members, and connecting frame heads provided in the area of the ends of said frame members, said connecting frame heads forming the abutments for the bearing housings and being detachably connected to said frame members, and being provided with means which enable them to be brought into a horizontal position in such way that one of the surfaces being in vertical position serves as guiding surface in vertical and lateral alignment with the guiding surface of the lower frame member.

Abstract: The present invention relates to an apparatus for changing the rolling-mill rolls and disk shoes of steel pipe rolling mills. The apparatus comprises mechanisms for raising and lowering a top and bottom cradle each holding a roll of a rolling mill and a carriage disposed below the bottom cradle and movable transversely, whereby the cradles are moved in and out of the rolling mill housing transversely by the carriage, and a plurality of holding devices each rotatable about a fixed shaft are selectively positioned opposite to a pair of chocks holding a pair of disk shoes for movement in parallel motion thereby changing the disk shoes.

Abstract: An improved cold roll forming apparatus providing for the exchange of rolls as a unit is disclosed, wherein sets of rolls are provided easily and removably exchangeable between sets of stands by one process. A frame supports the rolls and is lifted up to position the rolls between the stands, and at least one or more springy compressible devices are provided on the roll axles to operate as buffers and as devices to accelerate unfastening the rolls from holders of the stands. The springy compressible device has a cylindrical housing, a cover plate, and a spring exerting a biassing force between the cover plate and housing.

Abstract: Disclosed is a vertical stand of a sizing mill for rolling seamless tube in which each roll of the mill is contained in and supported by a yoke moveable both transversely of the product passline and axially of the roll axis, the latter adjustment being performed by an elevator arranged normally at the bottom of the mill for moving both yokes as a unit with their rolls, i.e. a yoke-roll set, through the top of the stand to a roll changing position where both yokes are transferred as a unit to one of two in-lined arranged side shifting carriages supported by the stand, the arrangement being such that when a used yoke-roll set is moved away from the stand at the top thereof by one of the carriages a replacement yoke-roll set is positioned above the stand of the other carriage in readiness to be received and lowered into the stand by the elevator.

Abstract: A tube forming mill, which consists of rolling mechanisms is mounted on movable trucks set or positioned on rails which are laid directionally crossing the material line flow at right angles thereto. The operation of the tube forming mill is as follows: While the rolling process is performed by one rolling mechanism, other rolling mechanism, which is to be used in the following process, is assembled onto the truck located at a position other than the unit rails which are on the material feeding line. After the last coil is passed through the rolling mechanism, the connector of the driving mechanism, which is disposed under the rails, is lowered to cut off the drive and the unit rails, together with the frame, are lifted by the elevating mechanism away from a fixing mechanism until the unit rails come up to the floor level.

Abstract: Apparatus for interchangeable mounting of rollers, comprising a roller unit having a shaft or axis with at least one roller arranged thereon and having two end members, a frame with a holder into which the roller unit is insertable from above, and lifter elements provided in or on the frame and by means of which the roller unit is displaceable between an operative position in which it is supported in the frame by supporting bearer members and a raised interchanged position in which it is removable from the frame.

Abstract: An apparatus for changing the rolls of a vertical rolling mill stand by moving each roll of a roll pair to the roll changing position transversely outwardly of the rolling position where the spacing between the rolls is maximum and then pulling upwardly the roll together with its upper and lower bearing boxes from a housing. The rolls may be changed even when a slab is passing.

Abstract: A roller block comprising a frame, a carriage vertically displaceable relative to the frame and having upwardly open or openable holders for the two ends of a roller unit which has a horizontal shaft or axis with at least one roller arranged thereon, and two bearers displaceable between a lowered position and a raised effective position, wherein the upper ends of the bearers form or are provided with bearing members for end members of the roller unit, which bearers are retainable in the raised position thereof independently of the carriage.

Abstract: It is desirable for a pair of horizontal roll assemblies of a rolling mill to be withdrawn from the mill simultaneously with the longitudinal axes of the rolls parallel and substantially horizontal. If material is present in the mill there can be no connection between the bearing chocks on the drive side of the mill. When the roll assemblies have been withdrawn from the mill, a support vehicle is positioned relative to the roll assemblies so that the rolls can be supported on upper and lower support surfaces provided on the vehicle. The vehicle is the displaced away from the withdrawal position of the rolls so that replacement rolls carried on a similar support vehicle can be moved to a position from which they can be inserted into the mill.

Abstract: The frame (2) of a rolling mill has a U-shaped mounting (12) for receiving and locating rolling stands (8). A pivoted limb (12a) of the mounting can be swung down to form a bridge between the frame (2) and a change-over trolley (5) for the purpose of transferring the stands between the frame and the trolley by means of draw-and-thrust-rods 15.

Abstract: A mill stand for steel rolling has a mill housing which allows installation and removal of a roll assembly in a direction transverse to the intended direction of steel through the mill stand. The housing is provided with means for locating and clamping the roll assembly in place and for releasing said clamping to allow removal of the assembly.

Abstract: For inserting and removing packers into and from a rolling mill stand having roll adjusting hydraulic piston and cylinder assemblies in the top of each stand housing, a packer-carrying sledge runs on tracks extending into the stand below the lowermost rolls of the stand. The sledge is located in the stand during rolling and can carry packers which are located operatively between the chocks of the lowermost roll and the housings.

Abstract: An apparatus for selectively drivingly connecting two drive spindles to roll necks of a rolling mill includes a base frame, a movable frame slidable on said base frame, two pairs of sliding posts vertically secured on a transverse member of the movable frame, at least two pairs of holding means slidable on the pairs of sliding posts and actuated by a hydraulic actuating means respectively so as to hold yokes of the drive spindles in a position in alignment with the roll necks of the roll mill, and another hydraulic actuating means actuating the movable frame toward studs of a pinion stand or the roll necks of the roll mill.

Abstract: A horizontal or vertical roll stand for a rod or bar rolling mill comprising a pair of work rolls having a plurality of grooves spaced axially along the surfaces thereof, each work roll being journalled between bearings contained in bearing chocks, with the bearings being adapted to accommodate axial adjustment of the work rolls in relation to the bearing chocks. The bearing chocks are supported in a housing with the work rolls in parallel relationship and with the grooves defining a plurality of roll passes. An axial roll adjustment means is associated with each work roll. Both of the axial adjustment means are driven by a common axial adjustment drive. A clutch is connected between one axial adjustment means and the axial adjustment drive. When engaged, the clutch permits the axial adjustment drive to operate through both axial adjustment means, thus axially adjusting both work rolls simultaneously.

Abstract: A roll stand for horizontally journalled contoured rolls is constructed to have two windows, through one of these windows driving engagement is made to the rolls and through the other one two subassemblies may be inserted or removed together from the stand. Each subassembly includes a pair of mounting blocks, a shaft and a roll on the shaft. The two subassemblies are axially locked together and/or independently to the stand, while one rests on the other or is suspended from adjustment spindles. The two subassemblies are removed from the stand together by a lifting fork, requiring only that the connection to the stand be released but leaving the two subassemblies interconnected.

Abstract: An apparatus for releasing a drive assembly from the neck of a roll of rolling mills and connecting the assembly to the roll neck. The apparatus comprises a pair of rails supported on fixed posts and extending in parallel to the axis of a working roll, a support member slidable on the rails, holding means mounted on the support member for holding the coupling of the drive assembly to be released from or connected to the neck of the roll in pressing with the outer periphery of the coupling, and operating means for slidingly moving the support member on the rails. The coupling is releasable from or connectable to the roll neck with ease for the replacement of the working roll. The apparatus is well-suited to small-sized rolling mills.

Abstract: A spring for longitudinally extending a drive shaft is disposed between a drive shaft member and a driven shaft member which are axially extensibly connected together as by a spline connection. The end surface of a driven shaft element adapted to be loosely fitted in a coupling connected to the driven shaft member has a cylindrical body fixed thereto coaxially with the center hole therein. The inner bottom of the coupling is provided at its center with a fitting hole of large diameter and a number of taper rollers are disposed in an annular space which is defined between the cylindrical body and the fitting hole as a result of the fitting between the coupling and the driven shaft element, thereby automatically bringing the axes of the coupling the driven shaft element into alignment with each other and eliminating the problem of rotational vibration due to the loose fit between the coupling and the driven shaft element.

Abstract: A balance bar device is disclosed for supporting a pair of mill rolls during a roll changing operation. A pair of vertically parallel roll end engaging members are mounted on one end of a beam for pivotal movement about corresponding horizontal axes extending transverse to the beam axis. The members are interconnected by a link so that the parallel relationship is maintained during pivotal movement thereof relative to the beam. The roll end engaging members are provided with bearing surfaces adapted to engage a roll end at diametrically opposed axially spaced apart locations so as to support the roll as a cantilever. By tilting the one end of the beam downwardly the roll end engaging members pivot relative thereto to freely receive the roll end therebetween. By then tilting one end of the balance bar upwardly the bearing surfaces are displaced toward one another to engage the roll neck.

Abstract: A pair of socket members adapted to receive the necks of a pair of mill rolls are mounted on a wheeled carriage for pivotal movement about corresponding horizontal axes perpendicular to the roll axes. The socket opening is of larger diameter than the roll neck and is provided with circumferentially extending diametrically opposed and axially spaced apart upper and lower load bearing surfaces adapted to engage corresponding upper and lower surface portions of the roll neck. The carriage moves the socket members toward the roll necks with the socket members inclined downwardly for the roll necks to be freely received in the socket openings between the corresponding load bearing surfaces. The sockets are then pivoted upwardly for the load bearing surfaces to engage the roll necks and support the corresponding roll as a cantilever. The carriage is then driven to withdraw the rolls from the mill.

Abstract: A rolling machine assembly for use in a press brake formed of an upper roll subassembly including an upper roll and an upper base and a lower roll subassembly including a pair of lower rolls and a lower base, the bases being detachably secured to the ram and bolster, respectively, of the press brake. Motors of the positive displacement type, fed from a flow divider, rotate the rolls to form a sheet of metal into desired curvature. The lower base has symmetrically located sockets for reception of the tines of a forklift truck so that when the upper roll is in nested position upon the lower rolls, and the securing means are disengaged, the subassemblies may be lifted out of the press brake as a unit by the forklift truck to free the press brake for other usage, and with the reverse procedure being effective for installation.

Abstract: A method of and apparatus for exchanging rollers in a continuous casting plant for strands, which plant has opposite roller paths for guiding the strand, involves moving the rollers to be exchanged into or out of their bearing places in the roller paths and transporting them away from or to the bearing place, respectively, in the region between the roller paths in the longitudinal direction thereof. Advantageously, a sled with recesses is provided for delivering and removing the rollers.

Abstract: A roll changing mechanism for the rolls of a rolling mill which are mounted in a roll stand and which define therebetween a pass line extending in a given direction includes a roll stand changing cart movable in a direction parallel to the direction of the pass line, a horizontal turntable on the roll stand changing cart having guideways thereon for receiving the roll stand and a swiveling frame adapted to have the roll stand supported therein and mounted for rotation in a vertical plane to move the roll stand through an angle of 90.degree.. The mechanism further includes a first conveyor device extending on one side of the swiveling frame between the roll stand changing cart and the swiveling frame for engaging the roll stand and for moving the roll stand from the changing cart to the swivel frame.

Abstract: An apparatus for the insertion and withdrawal of the rollers of a roll stand with a transfer car which is moveable in the roller direction, the rollers from the side in a horizontal position being pushed into the roll stand and withdrawn from the roll stand. A coupling drive is arranged on the transfer car, which drive comprises at least two equally long carrier arms which are coupled with each other over a cycloid transmission. A clamping head is arranged at the front free end of the carrier arms for the clamping and horizontal movement of the rollers on their mounting journals. A straight line guide device for the clamping head is arranged parallel to the cycloid transmission on the carrier arms.

Abstract: The disclosure concerns a roll changing device for roll stands of a rolling mill or the like having a pair of working rolls and backing rolls assigned to each working roll in which the roll pairs, including their component bearing parts, can be moved as separate units into and out of the windows of the housings of the mill. A piston cylinder assembly provided for this purpose is arranged in front of the understructure for the support member of the lower backing roll.

Abstract: An apparatus is disclosed for moving an assembly of two vertical rolls and their respective upper and lower bearing chocks into and out of a roll housing in a rolling mill. The apparatus includes a central carrying member acting through oppositely extending adjustable link members pivotally connected to the upper bearing chocks of the roll assembly.