Pole tube for electromagnets and magnetic valves, and method as well as apparatus for its manufacture

• Main Authors: BÄHR Sebastian, KEMNITZ Rocco
• Format: Patent
• Language: English
• Published: 24.08.2017
• Subjects: ACTUATING-FLOATS; BASIC ELECTRIC ELEMENTS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TAPS; THERMAL INSULATION IN GENERAL; TRANSFORMERS; VALVES; WEAPONS

The invention relates to a method for manufacturing a pole tube, with two magnetic pole tube parts, for an electromagnet, in particular for a magnetic valve of an automatic transmission in an automobile, including the following steps: (a) arranging the pole tube parts on a centering arbor; and (b), connecting, in particular insert molding and/or casting an outer lateral surface of the pole tube parts; wherein the centering arbor has a radially expandable cylinder surface also closed even in the expanded state. Further, the invention relates to, in particular with the method obtainable, a pole tube, an electromagnet for a magnetic valve, in particular for an automatic transmission in an automobile, having a pole tube according to the invention, and an apparatus for the manufacture of the pole tube.