Method for producing a pole core, pole core, electromagnetic actuator and vibration damper
View Patent ↗A pole core ( 1 ) is constructed by providing a magnetic workpiece ( 10 ), in which a first side ( 11 ) has a groove ( 15 ) directed toward a second side ( 12 ). Plural inserts ( 20 ) and bonding means ( 25 ) are inserted into the groove ( 15 ), with the bonding means ( 25 ) arranged between the inserts, and integrally bonding the inserts ( 20 ) to each other and/or to the workpiece ( 10 ). The pole core ( 1 ) may be used as in an electromagnetic actuator in a vibration damper for a vehicle, in which, if the electromagnetic actuator fails, the motor vehicle can be operated safely with the vibration damper.
1. A method for producing a pole core ( 1 ), comprising the following method steps:
providing a magnetic workpiece ( 10 ), which has a first side ( 11 ) and a second side ( 12 ), the first side ( 11 ) having a groove ( 15 ) directed toward the second side ( 12 ),
inserting at least two inserts ( 20 ) and at least one bonding means ( 25 ) into the groove ( 15 ), the at least one bonding means ( 25 ) being arranged between the two inserts ( 20 ), and
integrally bonding the at least two inserts ( 20 ) to each other and/or the at least two inserts ( 20 ) to the workpiece ( 10 ).
2. The method according to claim 1 ,
characterized in that
said integrally bonding of the at least two inserts ( 20 ) to each other and/or the at least two inserts ( 20 ) to the workpiece ( 10 ) is carried out by heating the workpiece and liquefying the bonding means ( 25 ).
3. The method according to claim 1 ,
characterized in that
the at least two inserts ( 20 ) are made of a non-magnetic material, in particular stainless steel.
4. The method according to claim 1 , characterized in that
the bonding means ( 25 ) comprises at least one isolated copper body which is inserted into the groove ( 15 ).
5. The method according to claim 1 , characterized in that
at least one of the two inserts ( 20 ) has a transition fit ( 23 ) on a first area ( 21 ) and/or on a second area ( 22 ) which is adapted to the groove ( 15 ).
6. The method according to claim 1 , characterized in that
at least one of the two inserts ( 20 ) is inserted by being pressed into the groove ( 15 ).
7. The method according to claim 1 , characterized in that
the workpiece ( 10 ) is positioned during integrally bonding in such a way that at least one of the two inserts ( 20 ) is pressed into the groove ( 15 ) by gravity.
8. The method according to claim 1 , characterized in that
heating the workpiece and liquefying the bonding means ( 25 ) is carried out until the bonding means has flown by capillary transport in the groove ( 15 ) between the inserts ( 20 ) and the at least two inserts ( 20 ) approximately abut against each other in the groove ( 15 ).
9. The method according to claim 1 , characterized in that
material is removed from the second side to expose the at least one of the two inserts ( 20 ), preferably by a machining manufacturing method.
10. A pole core ( 1 ) produced with a production method according to claim 1 .
11. The pole core according to claim 10 ,
characterized in that
a gap ( 17 ) divides the pole core ( 1 ) into at least two sections ( 16 , 18 ), and that in the gap ( 17 ) the at least two non-magnetic inserts ( 20 ) are arranged, via which the at least two sections ( 16 , 18 ) are bonded to each other.
12. An electromagnetic actuator with a pole core ( 1 ) according to claim 10 .
13. A vibration damper for a vehicle with an electromagnetic actuator according to claim 12 .
14. A vehicle with a vibration damper according to claim 13 .