Powder metallurgy part with inclination angles between inner bores and parting surfaces and mould structure thereof

Abstract

The invention relates to a powder metallurgy part with inclination angles between inner bores and parting surfaces and a mould structure thereof. The powder metallurgy part with the inclination angles between the inner bores and the parting surfaces comprises a part body compressed to be formed at a time through powder metallurgy. The part body is provided with an upper parting surface, a lower parting surface and a side surface, wherein the upper parting surface and the lower parting surface are parallel with each other; the side surface is coiled along the outline of the part body; an included angle alpha1 is formed between the side surface and a perpendicular bisector; the part body is provided with at least one inner bore; the inner bores penetrate through the upper parting surface and the lower parting surface, and the included angle alpha2 is formed between the central axis of each inner bore and the perpendicular bisector; the alpha1 is equal to the alpha2; the mould structure comprises a mandril, an upper mould, a middle mould, a lower mould, a delivery sheet and a powder feeder; and the part body compressed to be formed at a time through the powder metallurgy has good chemical, mechanical and physical properties in powder metallurgy process, and the dimensional precision is high.

Description

technical field [0001] The invention relates to a powder metallurgy part, in particular to a powder metallurgy part with an inclined angle between an inner hole and a parting surface and a mold thereof. Background technique [0002] At present, the powder metallurgy process has unique chemical composition and mechanical and physical properties, which can minimize the segregation of alloy components, eliminate coarse and uneven casting structures, and can be directly made into porous, semi-dense or fully dense materials and products. Such as oil bearings, gears, cams, guide rods, knives, etc., because in powder metallurgy equipment, the structure of the mold platform and the powder feeder are set horizontally based on the horizontal plane, and the upper and lower molds are used for upper and lower extrusion perpendicular to the horizontal direction. Pressed into parts, so it can only be extruded to form parts with the upper and lower sides perpendicular to the side. When it i...

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Problems solved by technology

[0002] At present, the powder metallurgy process has unique chemical composition and mechanical and physical properties, which can minimize the segregation of alloy components, eliminate coarse and uneven casting structures, and can be directly made into porous, semi-dense or fully dense materials and products. Such as oil bearings, gears, cams, guide rods, knives, etc., because in powder metallurgy equipment, the structure of the mold platform and the powder feeder are set horizontally based on the horizontal plane, and the upper and lower molds are used for upper and lower extrusion perpendicular to the horizontal direction. Pressed into parts, so it can only be extruded to form parts with the upper and lower sides perpendicular to the side. When it is necessary to manufacture irregular parts with an angle between the upper and lower sides and the side with internal control perpendicular to the horizontal plane, if according to the traditional It is impossible to process the mold and powder feeder structure. It can only be completed by other mechanical processing methods such as turning, milling, etc., so that the parts of this structure cannot achieve the chemical, mechanical and physical properties of ordinary powder metallurgy parts.

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