Patent application number | Description | Published |
20100086429 | THIN WALLED POWDER METAL COMPONENT MANUFACTURING - A powder metal component which has a powder metal composition formed into a cylinder, wherein the cylinder includes a wall thickness and a length, and a ratio of the length to the thickness is relatively high such that conventional compaction methods are difficult to use. The powder metal composition includes approximately between 85% and 99% sponge iron powder, approximately between 0.1% and 2.0% graphite, and approximately between 0.1% and 2.0% ethylene bis-stearamide wax. The powder metal component can be manufactured using an apparatus which includes a hard material core rod, and a shaped elastic die configured to circumscribe the core rod, or conversely, an apparatus with a shaped elastic core rod and a hard die. In the case of the former, the shaped elastic die can have an inner contour wherein a longitudinal load on the shaped elastic die radially compresses the powder metal to the desired shape and density distribution, hi the latter, longitudinally compressing the core rod radially compresses the powder metal to the desired shape and density distribution. An ejection punch can be made flush with the liner an pressure on the elastic die relieved prior to ejection to promote end integrity, the elastic die can be compressed alone or simultaneous with axial compression of the powder metal or a collet can be used to radially compress the elastic die using axial motion. | 04-08-2010 |
20100281941 | Core Rod Forging for Precise Internal Geometry - A forging die tool set defines a cavity and includes a core rod in the cavity for shaping a void in a work piece. The core rod extends in a direction in which the work piece is introduced, compressed, and ejected from the cavity. The core rod includes an upper portion and a lower portion. The upper portion has a cross sectional shape that forms a certain shape in the work piece and a radially tapered section that tapers toward the lower portion of the core rod. The lower portion also has a cross sectional shape that forms a certain shape in the work piece, and the cross sectional shape of the upper portion differs from the cross sectional shape of the lower portion, the lower portion being a more wear resistant shape characterized by larger radii and the upper portion being a finishing shape with smaller radii for shaping the final form of the forged work piece. | 11-11-2010 |
20100288593 | Reduced Stress Pawl and Ratchet Tooth for a One-Way Clutch - A one-way clutch with an outer race and an inner race is disclosed. One of the races includes at least one pawl and an engagement member for holding the at least one pawl in engagement with ratchet teeth on the other race. The contact surface of the at least one pawl or the ratchet teeth is an arcuate shape for improved load distribution. The arcuate contact surface has a radius of curvature that is greater than a radius of curvature at corners adjacent to the arcuate contact surface. | 11-18-2010 |
20100319650 | FUNCTIONALLY GRADED POWDER METAL COMPONENTS - The invention provides a method of manufacturing a ferrous monolithic component and the component that results from the method. The method of the invention utilizes selective rapid cooling of the portion of the component that is desired to have increased strength and selective controlled cooling of the portion or portions which are desired to be more machinable. The controlled cooling may include cooling, re-heating and re-cooling. The result is a component with local high strength in the rapidly cooled zones and locally altered metallurgical properties to improve machinability in the more slowly cooled zones. | 12-23-2010 |
20110059822 | Powder Forged Differential Gear - A differential assembly, bevel gears for the assembly, and a method of making the bevel gears are disclosed. The bevel gears have a form which provides for high power density transfer. | 03-10-2011 |