Composite powder metal variable boundary gear and method

a technology of variable boundary parts and composite powder, which is applied in the direction of mechanical equipment, transportation and packaging, hoisting equipment, etc., can solve the problems that the mechanical properties of carburized gears do not necessarily achieve the desired mechanical properties, and achieve the effects of greater tooth wear resistance, greater impact resistance, and greater tooth wear resistance on the teeth

Inactive Publication Date: 2007-09-27
SKN SINTER METALS LLC (US)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] In accordance with the above-mentioned needs, a variable boundary composite powder metal gear exhibiting greater tooth wear resistance on its surface and greater impact resistance in its core is disclosed. The forged composite gear includes a plurality of teeth extending from a core, a first section having a first powder metal material, a second section having a second powder metal material and a variable boundary profile. The variable boundary profile is formed between the first section and the second section, whereby the variable boundary profile provides for greater tooth wear resistance on the teeth and greater impact resistance in the gear core.

Problems solved by technology

However, a case carburized gear does not necessarily achieve the desired mechanical properties such as enhanced tooth wear and fatigue strength while providing beneficial performance characteristics in the body of the gear that could beneficially result if the part was made from composite materials.

Method used

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  • Composite powder metal variable boundary gear and method
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  • Composite powder metal variable boundary gear and method

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Embodiment Construction

[0015] In all figures, the same reference numerals are used to identify like parts in the various views. Thus, simultaneous reference to the various figures is appropriate. In some instances, for clarity, equivalent parts in different figures may have different reference numbers.

[0016]FIG. 2 shows an isometric view of a composite preform 84 made after compacting and sintering required to obtain the inventive product after forging in accordance with an embodiment of the invention.

[0017]FIG. 3 shows a partial cross-sectional view of the composite preform 84 of FIG. 2 having a composite material. The preform 84 includes a first powder metal material 55 and a second powder metal material 57 separated by material boundary 59. The material boundary 59 is representative of the boundary between at least two materials obtained after a compacting process of strategically filled or placed powder metals into a compaction die. While the material boundary 59 is shown as a precise demarcation be...

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Abstract

A forged composite gear and a method of making a forged composite powder metal gear. The forged composite gear includes a plurality of teeth extending from a core, a first section having a first powder metal material, a second section having a second powder metal material and a variable boundary profile. The variable boundary profile is formed between the first section and the second section, whereby said variable boundary profile exhibits greater tooth wear resistance on the teeth and greater impact resistance in the core.

Description

TECHNICAL FIELD [0001] The invention relates to a forged powder metal part and more particularly to a composite powder metal variable boundary part, including a method of manufacture thereof. BACKGROUND OF THE INVENTION [0002] There is continuing demand for manufacturing processes that may lessen the cost, time or steps in producing a part. More often than not, the benefits resultantly associated with improving the manufacturing process are necessitated in the first instance by customer requirements to develop and improve products to have superior dimensional, mechanical and / or performance properties. For instance a typical differential side gear may have any or all of the following performance requirements such as: the spline area requiring dimensional precision, high shear strength and brinnelling resistance; the hub and thrust faces requiring dimensional precision, surface finish and case compatibility; the gear geometry requiring dimensional precision, surface finish and optimis...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16H55/17
CPCB21K1/30F16H55/06F16H55/17Y10T29/49474Y10T29/49462Y10T29/49478Y10T29/49467Y10T74/19958
Inventor GEIMAN, TIMOTHY
Owner SKN SINTER METALS LLC (US)
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