Method of forming torque converter stator

Patent metadata

Field	Value
Publication number	US-9927015-B2
Application number	US-201514961190-A
Country	US
Kind code	B2
Filing date	Dec 7, 2015
Priority date	Dec 7, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A method of forming a stator for a torque converter is provided. The method includes casting a stator casting to include a body and blades on an outer circumferential surface of the body. The body includes excess material at an axial surface thereof. The method also includes machining the excess material to balance the stator casting. A torque converter is also provided. The torque converter includes a turbine, an impeller and a stator axially between the turbine and the impeller. The stator includes a stator casting including a body and blades on an outer circumferential surface of the body. The body includes a material segment at an axial surface thereof.

First claim

What is claimed is:

1. A method of forming a stator for a torque converter comprising:
casting a stator casting to include a body and blades on an outer circumferential surface of the body, the body including excess material protruding at an axial surface thereof; and
machining the excess material to balance the stator casting so as to decrease the amount the excess material protrudes at the axial surface.

2. The method as recited in claim 1 wherein the excess material is a ring.

3. The method as recited in claim 1 wherein the axial surface includes a tapered surface, the excess material being radially outside of the tapered surface.

4. The method as recited in claim 1 wherein the excess material includes a radially extending surface and an axially extending surface, the machining including removing at least a portion of the radially extending surface and removing at least a portion of the axially extending surface.

5. The method as recited in claim 4 wherein after the machining the excess material, a material segment of the excess material remains.

6. The method as recited in claim 5 wherein the material segment includes an axial surface extending from a remaining portion of the radially extending surface to a remaining portion of the axially extending surface.

7. The method as recited in claim 6 wherein the axial surface of the material segment extends axially and radially away from the remaining portion of the radially extending surface to the remaining portion of the axially extending surface such that the axial surface of the material segment is tapered toward the blades.

8. The method as recited in claim 1 wherein the machining includes applying a radially inward force to remove portions of the excess material.

9. The method as recited in claim 1 wherein machining the excess material to balance the stator casting includes removing a circumferential segment of the excess material.

10. A torque converter comprising:
a turbine,
an impeller; and
a stator axially between the turbine and the impeller, the stator including a stator casting including a body and blades on an outer circumferential surface of the body, the body including a material at an axial surface thereof including a first circumferential segment and a second circumferential segment, the first circumferential segment protruding at the axial surface and being thicker than the second circumferential segment, wherein the second circumferential segment includes a radially extending surface, an axially extending surface and an axial surface extending from the radially extending surface to the axially extending surface.

11. The torque converter as recited in claim 10 wherein the first circumferential segment and second circumferential segment are arcs that together form a ring.

12. The torque converter as recited in claim 10 wherein the first circumferential segment has a greater circumferential length than the second circumferential segment.

13. The torque converter as recited in claim 10 wherein the axial surface of the second circumferential segment extends axially and radially away from the radially extending surface to the axially extending surface such that the axial surface of the second circumferential segment is tapered toward the blades.

14. The torque converter as recited in claim 10 wherein the axial surface of the body includes a tapered surface, the first and second circumferential segments being radially outside of the tapered surface.

15. A method of forming a stator for a torque converter comprising:
casting a stator casting to include a body and blades on an outer circumferential surface of the body, the body including excess material at an axial surface thereof; and
machining the excess material to balance the stator casting,
wherein the axial surface includes a tapered surface, the excess material being radially outside of the tapered surface.

16. The method as recited in claim 15 wherein the excess material includes a radially extending surface and an axially extending surface, the machining including removing at least a portion of the radially extending surface and removing at least a portion of the axially extending surface.

17. The method as recited in claim 16 wherein after the machining the excess material, a material segment of the excess material remains.

18. The method as recited in claim 17 wherein the material segment includes an axial surface extending from a remaining portion of the radially extending surface to a remaining portion of the axially extending surface.

19. The method as recited in claim 18 wherein the axial surface of the material segment extends axially and radially away from the remaining portion of the radially extending surface to the remaining portion of the axially extending circumferential surface such that the axial surface of the material segment is tapered toward the blades.

Assignees

• Schaeffler Technologies Ag

Inventors

• Smith Matthew
• Jewell Jeremy
• Hess Timothy
• Acker Jed

Classifications

• F16H41/28 Primary

  with respect to manufacture, e.g. blade attachment · CPC title

• F16H2041/285

  of stator blades · CPC title

• F16H41/24

  Details · CPC title

• F16H2045/021

  three chamber system, i.e. comprising a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16H45/02

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title