Method for the production of a connecting rod

Patent metadata

Field	Value
Publication number	US-10746221-B2
Application number	US-201916256045-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Feb 14, 2018
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A method produces a connecting rod from a sintered material, which rod has at least one bore having a center axis, and has a first connecting rod eye in a connecting rod head, and a second connecting rod eye in a connecting rod foot, wherein the connecting rod head is connected with the connecting rod foot with a connecting rod shaft, wherein the bore is configured in the connecting rod shaft, wherein furthermore, the connecting rod is produced from a metallic powder, in accordance with a sintering process, for which purpose the powder is pressed into the corresponding mold to form a green compact, the bore is introduced into the green compact, and the green compact is afterward sintered. The bore is introduced into the green compact as a first and second partial bore, proceeding from the connecting rod foot and from the connecting rod head.

First claim

What is claimed is:

1. A method for the production of a connecting rod from a sintered material, which rod has at least one bore having a center axis, and has a first connecting rod eye in a connecting rod head, and a second connecting rod eye in a connecting rod foot,
wherein the connecting rod head is connected with the connecting rod foot with a connecting rod shaft,
wherein the bore is bored in the connecting rod shaft,
wherein furthermore, the connecting rod is produced from a metallic powder, in accordance with a sintering process, for which purpose the powder is pressed into the corresponding shape to form a green compact, the bore is introduced into the green compact, and the green compact is afterward sintered, and
wherein the bore is introduced into the green compact as a first and second partial bore, proceeding from the connecting rod foot and from the connecting rod head.

2. The method according to claim 1 , wherein the bore is produced from the two partial bores, each of the partial bores representing the half of the bore.

3. The method according to claim 1 , wherein the first and the second partial bore are produced simultaneously.

4. The method according to claim 1 , wherein a bore is produced, which has a diameter x and a drilled length in the direction of the center axis of at least 2x.

5. The method according to claim 4 , wherein the bore is produced with a diameter of x≤2 mm.

6. The method according to claim 1 , wherein a ring groove is formed in at least one of a starting region of the first partial bore and the starting region of the second partial bore.

7. The method according to claim 1 , wherein the green compact is held using a clamping apparatus during production of the bore.

8. The method according to claim 7 , wherein a clamping apparatus is used on which the green compact can support itself two-dimensional.

9. The method according to claim 1 , wherein the green compact has pressure applied to it during production of the at least one bore.

10. A connecting rod made from a metallic sintered material, which connecting rod has at least one bore having a center axis, a first connecting rod eye in a connecting rod head, and a second connecting rod eye in a connecting rod foot,
wherein the connecting rod head is connected with the connecting rod foot with a connecting rod shaft,
wherein the bore is arranged in the connecting rod shaft,
wherein the bore is introduced into a green compact for the connecting rod, and
wherein the bore is introduced into the green compact as a first and second partial bore, proceeding from the connecting rod foot and from the connecting rod head.

Assignees

• Miba Sinter Austria Gmbh

Inventors

• Neto Jose Correa
• Perugini Daniel Augusto

Classifications

• F16C7/02

  Constructions of connecting-rods with constant length · CPC title

• B22F5/10 Primary

  of articles with cavities or holes, not otherwise provided for in the preceding subgroups · CPC title

• F16C2204/00

  Metallic materials; Alloys (alloys in general C22C; F16C2206/00 takes precedence) · CPC title

• F16C2220/20

  by sintering pulverised material, e.g. powder metallurgy · CPC title

• F16C7/00

  Connecting-rods or like links pivoted at both ends (coupling-rods for locomotive driving-wheels B61C17/10); Construction of connecting-rod heads (heads rigid with crossheads F16C5/00) · CPC title