Rotor manufacturing method and rotor manufacturing apparatus
A rotor manufacturing method, which is method for manufacturing a rotor that includes a rotor core and a magnet inserted into a slot formed in the rotor core, includes a magnet-insertion step of inserting the magnet into the slot; and a fixing-material-injection step of injecting a fixing material into a space between an inner surface of the slot and the magnet from a plurality of fixing-material-injection portions of the slot. In the fixing-material-injection step, a time for starting injection of the fixing material into the slot is made to differ among the plurality of fixing-material-injection portions.
1. A rotor manufacturing method for manufacturing a rotor that comprises a rotor core and a magnet inserted into a slot formed in the rotor core, the method comprising:
a magnet-insertion step of inserting the magnet into the slot; and
a fixing-material-injection step of setting each of a plurality of fixing-material-injection portions to a position that overlaps an outer wall of the slot, and injecting a fixing material into a space between an inner surface of the slot and the magnet via the plurality of fixing-material-injection portions opened to the space in the slot,
wherein, in the fixing-material-injection step, at least one of: a time for starting the injection of the fixing material into the slot; a speed at which the fixing material is injected into the slot; and an amount of the fixing material injected into the slot is made to differ from one another among the plurality of fixing-material-injection portions so as to move the magnet in two different directions in the slot.
2. The rotor manufacturing method according to claim 1 ,
wherein, in the fixing-material-injection step, the fixing material is injected from one of the fixing-material-injection portions by using a first fixing-material-supply device that supplies the fixing material to the one of the fixing-material-injection portions, and the fixing material is also injected from another one of the fixing-material-injection portion by using a second fixing-material-supply device that supplies the fixing material to the another one of the fixing-material-injection portions.
3. The rotor manufacturing method according to claim 1 ,
wherein, in the fixing-material-injection step, on the basis of a pressure value of the fixing material in one of the fixing-material-injection portions, the time for starting the injection of the fixing material from another one of the fixing-material-injection portions is determined.
4. The rotor manufacturing method according to claim 1 ,
wherein, in the fixing-material-injection step, after the injection of the fixing material from one of the fixing-material-injection portions is complete, the injection of the fixing material from another one of the fixing-material-injection portions is started.
5. The rotor manufacturing method according to claim 1 ,
wherein in the fixing-material-injection step, the fixing material is supplied by fixing-material-supply devices via fixing material channels defined with lengths from the fixing-material-supply devices to the corresponding fixing-material-injection portions, and
wherein the lengths of fixing material channels are made to differ from one another among the fixing-material-injection portions.
6. The rotor manufacturing method according to claim 1 ,
wherein in the fixing-material-injection step, the fixing material is supplied by fixing-material-supply devices via fixing material channels extending from the fixing-material-supply device to the corresponding fixing-material-injection portions, and
wherein cross-sectional areas of the fixing material channels are made to differ from one another among the fixing-material-injection portions.
7. The rotor manufacturing method according to claim 1 ,
wherein one of the two different directions is a direction in which the magnet is moved away from the fixing-material-injection portions in the slot.
8. The rotor manufacturing method according to claim 1 ,
wherein the slot has a magnet placement portion in which the magnet is placed, each of the plurality of fixing-material-injection portions being set at the position that overlaps the outer wall of the magnet placement portion.