JPS605139B2 - How to shape stator coil ends - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for shaping the coil ends of a stator coil using a shaping agent.

A conventional coil end shaping method for a stator coil using a heater cast-in type upper and lower split shaping shell is as shown in FIG. 4, and the stator coilend 5 heated by electricity is inserted into the shaping groove 3 from above, brought into contact with the varnish 4, and further pressed from above, thereby melting the powder resin varnish 4 and hardening it by heating. As a result, the shaping and bundling of the coil end 5 were processed at the same time.

However, when shaping with the above method, when filling the powder resin varnish 4 into the lower shaping tool 2, it is difficult to control the volume of the powder resin varnish 4 and to uniformly spread it into the shaping groove 3.
As shown in the figure, an excessive amount of powdered resin varnish 4 adheres to the upper surface S of the lower shaping tool 2, causing poor walking, and the working environment is poor due to the conditions of using powder, especially powdered resin varnish 4 floating in the air. This was extremely bad for human health and there was a risk of inducing a dust explosion.

The present invention solves the drawbacks of the conventional methods described above, and is a stator coilend in which a shaping agent such as a powdered resin varnish is encapsulated with a heat-meltable resin material, and the encapsulated material is housed in the stator coil shaping chamber. This provides a plastic surgery method.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4. In the figure, 11 is an upper shaping bath, 12 is a lower shaping tool, 13 is a stator coil end, 14 is a shaping groove that contacts the stator coil end 13, 15 is a stator core, and 16 is a lower shaping jig 12. Heater cast into, 17
Reference numeral 18 indicates a template resin film coated on the contact surfaces of the stator coil end 13 of the upper shaping pick 11 and the lower shaping pick 12, and 18 indicates a powdered resin varnish.

Further, 20 is a film layer 21 made of a thin heat-meltable resin material that covers and encapsulates the powdered resin varnish 18;
is a donut-shaped capsule of powdered resin varnish consisting of this structure.

In the upper and lower split type shaping jig configured as described above, a donut-shaped powdered resin varnish capsule 21 in which powdered resin varnish 1 is preliminarily measured in the shaping groove 14 of the lower shaping jig turtle 2 heated by the heater. However, since the powder resin varnish 18 is also covered with the film layer 28 which is transparent and melts, the powder resin varnish 18 can be inserted onto the upper surface 19 of the lower shaping jig 12 without the powder scattering into the atmosphere. It can be easily and hygienically stored in the shaping groove 14 without excess adhesion, and the amount is just the right amount.

Thereafter, the heated stay coil end 13 is inserted into the shaping groove 14 of the upper and lower shaping jigs 11 and 12 and pressed from above, so that the film layer 20 of the capsule 21 is heated by the shaping groove 14 of the lower shaping tool 12. The powdered resin varnish 1 contained therein is melted by heating from the stator coil end 13 and covered with a film layer 20 at the same time by pressure.
8 flows in the shaping groove 14, and the stator coil end 13
The powder resin varnish 18 is cured while it is held in the press. Therefore, the bundling of the stator coilend 13 is completed at the same time as one shaping, and the yield of the materials used at that time is extremely high, sanitary, and simple.

In the above embodiment, a method using the powdered resin varnish 18 has been described, but the same method as described above can be carried out using other shaping agents such as molding resin powder.

As explained above, the present invention improves the yield of the shaping agent and enables uniform distribution of the shaping agent supplied to the shaping grooves of the shaping tool by using a simple method of using the shaping agent encapsulated in a hot-melt resin film. Furthermore, it is sanitary and safe because it completely prevents it from scattering into the atmosphere.

Therefore, the dimensional accuracy of the stator coil can be easily improved by simultaneously shaping and bundling the stator coil in the above-mentioned characteristic atmosphere.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional heater cast-in type upper and lower split type shaping tool, stator, and powder resin varnish. Figure 2 is a sectional view of a shaping jig and powder resin varnish showing the drawbacks of the conventional type. Figure 3. is a sectional view of a shaping jig showing an embodiment of the present invention,
FIG. 4 is a cross-sectional view showing the same encapsulated shaping agent. 11, 12... Shaping jig, 13... Stator coil end, 14... Shaping groove, 18.
... Powder resin varnish, 20 ... Hot-melt resin film layer, 21M"" capsule. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A stator coil that is heated after encapsulating a coil shaping agent such as powdered resin varnish or molding resin powder by coating it with a heat-melting resin material, and storing the capsule in the stator coil end shaping groove of a stator shaping jig. A method for shaping a stator coil end, characterized in that the stator coil end is shaped and tied by inserting the end and applying pressure.