A process for the preparation of a permanent magnet, a method for the simultaneous production of at least two permanent magnets, a process for the manufacture of a first and a second magnet and a method for manufacturing a rotor

摘要

One aspect of the invention relates to a process for the manufacture of a pressed magnet of a magnetic powder (200). For this purpose, a press (100) are used, which has a die (130), as well as a press hollow (150), which in the die (130) is arranged, and a coil arrangement (161, 162). Furthermore, a press ram (110) is used, which, in a pressing direction (z) relative to the die (130) is adjustable. While the coil arrangement (161, 162) with respect to the die (130) in a first relative position is located, the magnetic powder is (200) of the magnet field with the aid of a filling with the coil arrangement (161, 162) is produced into the press is filled with hollow (150). While the coil arrangement (161, 162) with respect to the die (130) from the first relative position in a different second relative position is located, will be the magnetic orientation of the in the press hollow (150), filled with magnetic powder (200) with the aid of a of the coil arrangement (161, 162) generating orientation magnet field (h_Om) aligned. In the direction of the press hollow (150) and filled with the aid of the orientation of the magnet field (h_Om) oriented magnetic powder (200) is sealed by the action of the press ram (110) to produce a green compact is compressed and then sintered to a powder pressed permanent magnet.