Annular part shaping device

Abstract

The invention discloses an annular part shaping device. The annular part shaping device comprises a bottom plate and a lower die base fixedly arranged on the bottom plate, and is characterized by further comprising inner sliding blocks arranged in the lower die base and inner sliding block shovel bases in a truncated cone shape, wherein the inner sliding block shovel bases are fixedly connected with the bottom plate; a plurality of shovel base guide ways and the inner sliding blocks with the number corresponding to that of the shovel base guide ways are arranged on the peripheries of the innersliding block shovel bases, and the inner sliding blocks reciprocate in the lower die base under the guide of the shovel base guide ways; inner sliding block reset mechanisms are arranged on the lower die base; inwards-concave step-shaped shaping working faces are arranged on the inner sides of the tops of the inner sliding blocks, each step-shaped shaping working face comprises a vertical face and a workpiece bearing face, and the distance between the inner arc and the outer arc of each workpiece bearing face is slightly larger than the distance between the inner circumference and the outercircumference of an annular part; the height of the vertical faces is smaller than the thickness of the annular part; the vertical faces of the step-shaped shaping working faces on all the inner sliding blocks are spliced to be in an annular shape; and limiting hanging tables which protrude in the radial direction and extend to the positions below the inner sliding block shovel bases are arrangedat the bottoms of the inner sides of the inner sliding blocks.

Description

technical field [0001] The present application relates to the field of metal powder molding, in particular to a device for shaping ring-shaped parts. Background technique [0002] Metal Powder Injection Molding (MIM for short) is a new type of powder metallurgy near net shape forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. In the shaping process after the metal powder injection molding process, especially when it involves round parts, due to the large sintering shrinkage, there are often out-of-round phenomena. According to the size of the product, the out-of-roundness can reach 0.5mm-1mm. The difficulty of shaping is different from other The shaping of parts generally uses hydraulic presses or manual presses combined with shaping molds for shaping operations. Products with relatively high roundness requirements have a high scrap rate and low work efficiency, especially when the roundness reaches below...

AI Technical Summary

Problems solved by technology

In the shaping process after the metal powder injection molding process, especially when it involves round parts, due to the large sintering shrinkage, there are often out-of-round phenomena. According to the size of the product, the out-of-roundness can reach 0.5mm-1mm. The difficulty of shaping is different from other The shaping of parts generally uses hydraulic presses or manual presses combined with shaping molds for shaping operations. Products with relatively high roundness requirements have a high scrap rate and low work efficiency, especially when the roundness reaches below 0.1mm. It is difficult to achieve with technical shaping tools. In production practice, we accidentally found that the roundness of the traditional two semicircular outer sliders and inner extrusion structure after shaping is within the range of 0.2-0.5mm.

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