Man Technologie Gmbh

Maschinenfabrik Augsburg-nurnberg Aktiengesellschaft

M.a.n. Maschinenfabrik Augsburg-nurnberg A.g.

Manfred Eckert

Heinz Gronert

Johann Munich

Henning Von Petersdorff

Jochen Vetter

Wulf Radtke

Maximilian Hammer

Willibald Huber

Anton Pfeil

Josef Appoloner

Klaus Bergen

Manfred Mix

Gunther Nuissl

Klaus Kiessling

A method for the automatic control of the setting of spinning rolls in relation to a cylindrical, tubular workpiece in an opposed roll spinning lathe with four pairs of rolls. Each of the four pairs of rolls consists of one inner roll and one outer roll each, of which is arranged on a holder on a carrier so as to be radially adjustable in relation to the workpiece and so that the pairs of rolls are arranged at equal circumferential spacing about the workpiece so that the roll pair acting as the first rolling stage is placed diametrically opposite the second roll pair operating as the second rolling stage, the roll pair operating as the third rolling stage is offset by 90.degree. in relation to the first roll pair and is diametrically opposite the roll pair operating as the fourth rolling stage so that during the spinning rolling process the pairs of rolls and the workpiece perform a translatory and a rotary motion and furthermore the radial forces acting on the rolls are continuously measured. During the coming into working engagement with the workpiece and the stationary rolling process the radial forces occurring at like rolls whether (inner or outer) of the respectively oppositely placed roll pairs are compared with each other and if a permissible differential force is exceeded, the roll of the respective preceding roll stage is adjusted radially to compensate the lack of force equilibrium and simultaneously however the compared or reference roll is kept in a radial position corresponding to its initial basic value.

Method for automatically controlling spinning rolls

For the continuous measurement of the thrust forces produced by the spinning rolls on the workpiece to be extended while the spinning rolls are rotating a measuring rod is provided, which has its one end fixed coaxially on the spindle within a hollow spindle, while its other end projects freely out of the spindle. In the plane of the free end of the measuring rod a distance sensor is arranged, which detects the radial displacement, caused by the radial flexure motion of the spindle, of the measuring rod and computes the force acting on the spinning roll using a processing unit.

Device for measuring forces in metal spinning lathes

In an apparatus for rolling the walls of a tube in order to decrease the wall thickness and so increase the length of the tube by the use of pairs of rolls of which one roll is outside the tube wall and the other roll is inside it and in which relative axial motion and relative rotation takes place between the tube and the roll pairs, an increase in the possible length of tube which may be rolled is produced by having all the rollers carried on means extending from a common support structure on which a holder for one end of the tube is also carried.

Machine tool for the production of tubular components

Heat exchangers which, through convection or radiation, are designed to absorb varyingly high energy flow about the circumference of their heat transmission walls. The cross-sectional area of the heat exchanger is subdivided into two or more flow passageways by means of inserts in such a manner, that the temperature differences and thermal stresses in the wall resulting from the high differing energy densities are reduced or even prevented. Achieved hereby is an extensively balanced temperature about the circumference of the heat exchanger wall so as to eliminate injurious thermal stresses.

Heat exchanger

A high-speed rotor constructed of elemental boron and fashioned as a hollow element such as a centrifugal drum.

Rotor for high operating speeds

Growing community of inventors

Dachau, Germany

Manfred Eckert