# US 4,397,413 A · Process for manufacturing plastically deformed light metal objects having a connector part of a different metal

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- Number: US 4,397,413 A
- Document ID: US4397413A
- Status: Granted
- Kind: A
- Application number: 06/256,292
- Filed: 1981-04-22
- Granted: 1983-08-09
- Earliest claimed: 1980-05-03
- Assignees: Swiss Aluminium Ltd.
- Inventors: Alfred Wagner; Adolf Ames; Ulf Hodel
- Web page: https://patentgrep.com/patent/US4397413A

## CPC

- B21C 23/24: Covering indefinite lengths of metal or non-metal material with a metal coating
- B21C 23/22: Making metal-coated products; Making products from two or more metals
- B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL

## Abstract

Manufacture of a light metal shock absorber by impact extrusion of the light metal of a steel-light metal composite blank, wherein the metallic bonding of the composite blank is achieved by coextrusion. The steel component on the bottom face of the light metal shock absorber is provided with a steel ring which is welded or otherwise appropriately joined during or after impact extrusion. Also the light metal sleeve of the shock absorber can, after impact extrusion, be welded or otherwise appropriately joined to light metal.

## Claims

### Claim 1

A process for manufacturing deep drawn plastically deformed light metal objects having a light metal component joined securely to a heavy metal component comprising the steps of:
supplying a light metal component to an extrusion die;
supplying a heavy metal component to said die for extrusion along with said light metal component whereby said heavy metal component is joined to said light metal component during the extrusion; and
deep drawing said light metal component while said heavy metal component remains joined to said light metal component.

### Claim 2 (depends on 1)

A process according to claim 1 including the step of supplying two heavy metal components in face to face contact with each other and with their other respective faces contacting said light metal component whereby each of said heavy metal component is joined to said light metal component during the extrusion but not to each other.

### Claim 3 (depends on 1)

A process according to claim 1 further including the steps of joining said heavy metal component of the deep drawn object to another metal component.

### Claim 4 (depends on 1)

A process according to claim 1 further including the steps of joining said light metal component of the deep drawn object to another metal component.

### Claim 5 (depends on 1)

A process according to claim 1 wherein said light metal component is drawn into a sleeve-like cylinder.

### Claim 6 (depends on 1)

A process according to claim 1 wherein said heavy metal component is steel and said light metal component is aluminum.

### Claim 7 (depends on 1)

A process according to claim 1 wherein said light metal component prior to deep drawing is thicker than said heavy metal component.

### Claim 8 (depends on 7)

A process according to claim 7 wherein said light metal component is deep drawn until its thickness is about equal to the thickness of said heavy metal component.