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61 results about "Cylindrical geometry" patented technology

Cylindrical coordinate geometry, also known as cyclic coordinate geometry, is a scheme for guiding a robot arm in three dimensions. A cylindrical coordinate system is a polar system with an extra coordinate added for elevation.

Conveying roller for a paper web, machines equipped therewith and methods of use

The roller (1) is used for conveying a web or sheet of paper (20) in paper converting machines, for example, a rewinding, a winding, an interfolding machine. It comprises a first outer cylindrical tubular body (2) equipped with a plurality of radial holes (3), arranged according to substantially longitudinal rows, capable of rotating with respect to a second inner fixed body (4) co-axial to it and connected to a suction system. The second body (4) has tubular cylindrical geometry like the first body (2) and has a plurality of apertures (5) and two radial boards (7) arranged at opposite sides with respect to the apertures (5). The inner surface of the first cylindrical tubular body (2), together with the radial boards (7) and to the external surface of the second tubular body (4), define a suction chamber (6) that brings selectively in communication selected rows of holes (3) of the first cylindrical tubular body (2) with the apertures (5) of the second tubular body (4) and then with the suction system of the machine during the relative rotation of the two bodies. Therefore, a web or sheet of paper (20) adheres to the external surface of the first body (2) only in the portion P1P2 of surface set between the rows of holes (3') that communicates with the suction chamber (FIG. 4).
Owner:MTC MACCINE TRASFORMAZIONE CARTA SRL

Method and system for monitoring spatially correlated cylindrical shape error and medium

The invention provides a spatially correlated cylindrical shape error monitoring method and system and a medium, and the method comprises a surface measurement step of measuring the surface of a cylinder, and obtaining the three-dimensional coordinate data of a measurement point; a data processing step of obtaining an error value of the measurement point according to the obtained three-dimensional coordinate data of the measurement point; and a spatial correlation judgment step of judging whether the error value of the measurement point has the spatial correlation or not according to the obtained error value of the measurement point, and obtaining a spatial correlation judgment result. The monitoring method and system of the cylindrical geometric error with spatial correlation provided by the invention can reflect the form of the processing error more accurately, remove the influence of the spatial correlation on the measurement result and effectively improve the recognition rate of unqualified products, and improves the defect that the traditional cylinder quality monitoring cannot reflect the geometric shape of the cylinder and the defect of the spatial correlation caused by a large number of measuring points.
Owner:SHANGHAI JIAO TONG UNIV

Electromagnetic actuating device

The invention relates to an electromagnetic actuating device (10) for a valve, having an armature (28) which is arranged in a hollow cylindrical armature chamber (28) so as to be axially displaceable between two axial stops (52, 54), wherein the armature chamber (26) is delimited by a magnet yoke (18; 22), wherein an electrical coil (24) extends coaxially around the armature (28), and wherein the magnet yoke (18, 22) is at least partially arranged in a housing (12). According to the invention, the actuating device (10) is characterized in that the armature (28) has a cylindrical geometry with a base (32) remote from the housing and with a hollow cylindrical end section (40) situated axially opposite, in that the base (32), which is remote from the housing, of the armature (28) is connected to an actuating plunger (34), in that a guide sleeve (42) is mounted axially onto the hollow cylindrical end section (40) of the armature (23), and in that, on that end of the guide sleeve (42) which is remote from the actuating plunger, there is arranged or formed an adhesion prevention device (84) which prevents or at least greatly impedes axial adhesion of the armature (28) to the magnet yoke (18, 22). The guide sleeve (42), which can be produced with very high accuracy in terms of manufacturing, with integrated adhesion prevention device (84) makes it possible to realize a reduction in width of the parasitic air gap between the armature (28) and the magnet yoke in order to increase the actuation forces of the actuating device (10) with a simultaneously reduced number of components.
Owner:SCHAEFFLER TECH AG & CO KG
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