摘要:
A skew rolling mill has three taper rolls, inclined at an angle to the axis of the rolled stock and offset relative to each other by 120.degree.. Each taper roll is driven through a bevel gear pair, intermediate shaft, intermediate gear and a planet gear, from a sun gear disposed on a rotatable hollow shaft. The roll and its drive are combined by means of a casing into a roll head. The casings are rockers which can pivot along the end face of the roll support and have pivot axes disposed outside the axes of the intermediate gears, in or near the common plane of the axes of the associated intermediate gear and planet gear. These pivot axes can be adjusted to a small extent in a guide extending perpendicularly to the common plane.
摘要:
Output shafts of a pinion stand are connected with rolls of a working stand by means of spindles provided with a shaft whose ends are formed with Hooke's joints. The angles of obliquity of the shafts of the spindles are similar for all the joints of the spindles. The axes of the output shafts of the pinion stand are equidistant from the axis of rolling. The angular space relationship of the pinion stand with the working stand, i.e. the angle of inclination of the plane, passing through the axis of rotation of the output shafts and through geometrical axis of the pinion stand, to the plane passing through the axis of rolling and through the axis of a variable angle of rolling, is determined by a formula.
摘要:
An inclined rolling stand for reducing a starting material to a pipe or rod, which includes a roll carrier adapted to be driven and to permit a central passage of the material to be rolled. The roll carrier includes three conical substantially identical and axially adjustable working rolls which are adapted to be driven and are inclined relative to the rolling axis at the same acute angle. The three working rolls are offset relative to each other around the rolling axis by 120.degree. and are so directed with regard to the rolling axis that their extended axes respectively cross the rolling axis at the same short distances while the narrow ends of the conical working rolls respectively include a smoothing zone representing a surface of rotation about the axis of the respective working roll. The respective mantle line of the surface of rotation representing the smoothing zone is so concave that the respective concave mantle line contacting the material to be rolled, when rotating about the material to be rolled, forms the mantle surface of an imaginary cylindrical body.
摘要:
There is disclosed a rolling mill comprising a pair of generally discus shaped rolling heads affording opposed rolling surfaces, the rolling surface of each head being provided by its surfaces inclined at a substantial angle to the axis of rotation of the rolling head, the rolling heads being mounted so that their axes of rotation are in parallel planes spaced apart from one another, the axes of rotation of the rolling heads being inclined to one another, and drive means arranged to be capable of rotating the rolling surfaces of the heads in opposite senses relative to each other and at different speeds.
摘要:
In order to avoid the slight spiral marking on the final section produced by forming material in a skew-rolling mill, and in order to provide exact sizing and shaping of such material, the rolled material leaving the skew-rolling mill is fed through an extrusion die by axial thrust imparted to the material in the skew-rolling mill.
摘要:
The disclosure of this invention relates to guiding devices for use with a piercing mill and, more particularly, to what is referred to as guiding discs. The illustration of the invention discloses an arbor for each guiding disc received in a separate housing, the guiding disc being carried by extending portions of their arbors. Piston cylinder assemblies are connected to the extending portions of the arbors for creating a force for causing a forcible contact between the discs and arbors and allowing wedges to be inserted between the piston rods and spacer elements arranged to contact the discs. The arbors are rotated by gear trains in addition to being axially adjusted by worm wheel sets.
摘要:
There is disclosed a novel power adjustable guide holder or support for a bar and tube straightening machine. A lower guide holder or support assembly includes an elongated strong base unit comprising a centrally hollow base plate and an integral elongated housing supporting operating parts. A power adjustable cover is disposed over the elongated housing and includes on the top thereof a tapered skewed groove which receives and retains against accidental removal a guide, the upper edge of which is adapted to be engaged by a bar, tube, or the like, being straightened by the machine. The over also prevents scale, coolant, and other foreign matter from falling into and jamming the mechanical operating structure within the guide holder assembly. Hydraulic motors within the housing are selectively actuatable to rotate vertical threaded shafts carrying rider nuts for raising and lowering the ends of the cover to adjust the positions of the retained guides. The elongated base unit is a structural member of sufficient strength to resist the turning forces of a bar as it goes through the machine on top of the guide and yet is narrow enough so that the guide holder does not interfere with the rolls of the machine. The top of the cover is wide enough to permit the skewing of the guide retaining groove, thereby giving additional clearance in respect to the rolls.
摘要:
A method of manufacturing seamless tubing from a tubular bloom is provided in which the bloom is reduced on a mandrel or like rod in a first skew rolling mill inserted into the bloom, and the tube issuing from the first skew mill is immediately rolled in a continuous manner on a mandrel or like rod in a second skew mill directly contiguous to the first skew mill.
摘要:
A support system for supporting a rod-like workpiece in a crossrolling machine includes a fluid pressure control piston having a rod member with a rotatable chuck for supporting one end of the rod-like workpiece and a second fluid pressure-controlled piston which has a rod member provides a centering means for holding the opposite end of the workpiece. The workpiece is shiftable axially with the rod members on rollers and it is centered over the roller by rings which extend around each roller and define a passage therewithin over each roller for the guiding of the workpiece.
摘要:
Cross roll carrier frames are rotatably supported in the roll frame housing. A pair of spaced manually operated screws engage each frame on either side of the centerline of the frame with one screw adjusting the frame in one direction and the other screw locking the frame in its adjusted position. The operation of the screws is reversed for adjustment in the other direction.