Cast part with a metallic functional region

Patent metadata

Field	Value
Publication number	US-10112231-B2
Application number	US-201615552174-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Feb 20, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A cast part includes a metallic functional region. The functional region extends in a first direction from a first side to a second side of the cast part. The cast part has a surrounding region at least partially surrounding the functional region. The functional region is shaped by a friction-based process. Further disclosed is a piece of equipment, such as an electrical machine which includes a further component and a device for securing the further component against twisting. The device has a connection between the functional region of the cast part and the further component.

First claim

What is claimed is:

1. A method for producing an electrical machine, comprising:
bringing a rotating tool including a cylindrical main part into contact with a cast part as a pin, movably received in the main part and having a cutting edge, assumes a retracted position;
rotating the tool in a first direction of rotation to locally plasticize a material of the cast part at a location of a metallic functional region to be shaped of the cast part by a friction-based process;
extending and introducing the pin into the plasticized material far enough to reach a surface of the further component, while the material of the cast part continues to be plasticized by a shoulder of the main part adjacent to the pin;
changing the direction of rotation of the tool after the tool has reached the surface of the further component;
introducing the pin in a first direction into the further component to thereby form a recess in the further component through metal-cutting work via the cutting edge as the tool rotates in a second direction of rotation while the shoulder continues to plasticize the material of the cast part;
withdrawing the pin by a defined amount after the pin has reached a final position, thereby establishing the functional region of the cast part; and
concurrently flowing plasticized material of the cast part and swarf, produced by the metal-cutting work as the shoulder applies a compressive force in the first direction, into a space of the recess to thereby produce a mixed structure or dispersion hardening.

2. The method of claim 1 , further comprising securing the further component against twisting by connecting the functional region of the cast part and the further component.

3. An electrical machine, comprising:
a cast part including a metallic functional region extending in a first direction from a first side to a second side of the cast part, said cast part having a surrounding region which at least partially surrounds the functional region, said second side having a shaped structure which is surrounded by the surrounding region and which forms a depression on the first side and an elevation on the second side relative to the surrounding region;
a further component; and
a device for securing the further component against twisting, said device having a connection between the functional region of the cast part and the further component, said functional region being shaped via a friction-based process as set forth in claim 1 .

Assignees

• Siemens Ag

Inventors

• Handwerker Michael
• Bergmann Jean Pierre
• Schürer René
• Johannes Markus
• Sünnemann Maximilian

Classifications

• B21J5/063

  Friction heat forging (friction heat riveting B21J15/027) · CPC title

• B21K25/005 Primary

  by friction heat forging (B21J15/027 takes precedence; friction heat forging per se B21J5/063) · CPC title

• B23K2103/06

  Cast-iron alloys · CPC title

• B21J5/066 Primary

  Flow drilling · CPC title

• B23K20/127

  Friction stir welding involving a mechanical connection · CPC title