摘要:
The invention relates to a method for producing a connecting element comprising at least two ball-like sections, wherein two ball-like sections are directly adjacent to each other, or wherein two ball-like sections are connected to each other by means of a connecting section, wherein the rolling of a single-piece blank, which is cylindrical at least in sections, between at least two rolling tools and the shaping of the at least two ball-like sections and optionally of the connecting section during the rolling are provided.
摘要:
The present disclosure relates to a method for producing a profiled hollow shaft for a telescopic steering shaft of a motor vehicle. A hollow shaft to be machined and a roller forming head having at least one roller are provided. A groove is produced in the hollow shaft by moving the hollow shaft relative to the roller forming head. In order to provide an improved and less expensive method for producing a profiled hollow shaft for a telescopic steering shaft of a motor vehicle, the hollow shaft is moved relative to the roller forming head exclusively in the direction of the longitudinal axis of the hollow shaft. The disclsoure also relates to a steering shaft having rolling body raceways.
摘要:
A method for producing a rotationally symmetrical hollow metal part, particularly a shaft. According to the method, bar-shaped ductile solid matrial is provided, the solid material is heated from about 300° C. below the forging temperature to the forging temperature, the solid material is transversally spline-rolled until weakenings are created in the core zone (3) of the solid material and the sold material is torn open. Two mandrels (5,6) are forcibly introduced into the center of the bar-shaped solid material during the rolling process, and then one mandrel is retracted while the other mandrel continues advancing so as to produce a tubular part. A transversally spline-rolled rotationally symmetrical hollow part, especially a shaft, which is produced accoridng to noted method can be embodied as a transmission shaft, camshaft, drive shaft, output shaft, starter shaft, hollow shaft, or can bea preform for molded parts and the like.
摘要:
The invention relates to a method and a device for transversely rolling stepped hollow shafts or cylindrical hollow parts from a pipe. The invention achieves the object of rolling stepped hollow shafts of the most varied dimensions and also of greater lengths in a flexible manner from a pipe using a small number of simple tools. In accordance with the invention, the object is achieved by virtue of the fact that rolling tools which can be radially advanced and are disposed in a planet-like manner around the workpiece are used to roll the contour of the transition from a central diameter in one portion of the workpiece to the central diameter in the adjacent portion by means of co-ordinated control of the radial advance of the rolling tools and the axial feed of the workpiece, and a mandrel head having an outer diameter which is adapted to the smallest inner diameter of the two portions is disposed underneath the rolling tools.
摘要:
This method refers to a method by which the physical and mechanical properties intrinsic to a fine-grain structure may be formed in metal billets using pressure treatment. The method is designed to treat rods, bars and other particularly long billets. This method is designed to lower the cost of deformational treatment for long rods and large diameter billets and creates a pre-specified microstructure, including micro-crystal structure, and specific physical and mechanical properties. This may be achieved using various treatment techniques, one of which includes the deformation of at least a part of the billet through reduction of the billets cross-section. In this method, a long rod shaped billet is used. Reduction of the cross-section is achieved using tools that permit movement along and across the billet's axis as well as being rolled about its surface, for example, a roller. In this case at least one support stand is employed for correct placement of the billet. Additionally, a pre-specified strain level is achieved using at least one of the techniques of deformation: torsion, settling and extension using tools, for example the above-mentioned stand. The stand is designed to apply a specified scheme of deformation to the billet at the deformed (strained) section and at a specified temperature. This obtains specified structure with intrinsic physical and mechanical properties.
摘要:
Apparatus for making electrical pins with frusto-conical end portions, comprises a wire feed station for the supply of a length of metal wire to a wire severing station at which a wire severing wheel severs the wire into pin blanks, in cooperation with a fixed bushing. The wheel pushes the blanks along a track to a pin blank rolling station at which the end portion of the pin blanks are rolled to frusto-conical shape between a pin rolling fixture and a pin rolling wheel having mounted for rotation relative thereto, a pin blank entraining ring having pin blank receiving grooves.
摘要:
A method for hot rolling a continuously cast thin slab to form strip comprising the steps of: (a) subjecting a segment of predetermined length of the slab to a reduction pass in a first direction between a pair of work rolls; (b) retracting the segment in a direction opposite the first direction to the entrance side of the work rolls while accommodating the additional length of the segment produced by the reduction operation; (c) repeating steps (a) and (b) in sequence as necessary to finish the segment; and (d) consecutively subjecting the next contiguous portion of the slab to steps (a), (b) and (c) until the slab is finished along its entire length. Apparatus for practicing the method also is disclosed.
摘要:
Disclosed is a method of manufacturing articles by deformation of cylindrical blanks, comprising heating the blanks (1), their transverse wedge forming followed by deformation of the end crops (3) by shearing blades, separating the end crops (3) from the formed blanks (2), and flashless forging of the formed blanks (2), separation of the end crops (3) from the formed blanks (2) being performed by reducing the speed of rotation of the end crops (3) after deformation down to a value ranging from .omega./2.5 to zero, where .omega. is the speed of rotation of the blank (2) during forming.
摘要:
Dies for cross rolling machines for manufacturing a graduated shaft from a round bar, characterized therein that levels of dies in contact with a rolled material is formed increasingly higher from a developing point of shaping for the dies in the forward direction of said dies to a finishing point of shaping for the dies so as to elongate a minimum diameter portion or a portion of axis having large surface reduction by top portions of the dies during advance in the rolling operation of the dies.
摘要:
An improved die for a ''''wedge roll'''' type roll forming machine including a pair of vertically spaced rolls adapted for rotation in the same direction and defining a pair of mounting surfaces adapted for rigidly supporting the dies, the improved dies including a generally triangular forming surface bounded along the leading converging edges by a pair of driving surfaces disposed at an angle with respect to the forming surface, each of the driving surfaces having formed thereon a plurality of randomly spaced and irregularly shaped raised projections having flat top surfaces, tapered sides and substantial column rigidity under compression forces.