Core bar of forming die extruded by perforated bar material

Abstract

The invention discloses a core bar of a forming die extruded by perforated bar material. The core bar (2) comprises an extrusion press connecting part (21), a core bar seat connecting part (22), a core bar connecting part (23), and a bar molding core bar (24) which are connected in sequence; the extrusion press connecting part (21) is provided with an external thread matched with an extrusion press, the core bar seat connecting part (22) passes through and is assembled at an inner circular ring (13) of a core bar seat (1), and the cross section diameter, close to the core bar seat (1), of thecore bar connecting part (23) is larger than the inner diameter of the inner circular ring (13) of the core bar seat (1). According to the core bar of the forming die extruded by the perforated bar material, the core bar connecting part and the inner circular ring of the core bar seat are provided with a locating slot and an inserted pin arranged axially, meanwhile, by cooperation of the locatingslot, the inserted pin and core bar fixing parts, the core bar is hung in the air and fixed in a funnel-shaped inner cavity, and relative rotation displacement between the core rod and the core rod seat can be avoided so as to avoid product errors.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a core rod of a bar extrusion molding die with holes. Background technique [0002] Powder metallurgy is an important component forming technology. The continuous emergence of new technologies and processes of powder metallurgy will surely promote the rapid development of high-tech industries, and will also bring bright prospects to material engineering and manufacturing technology. At present, the overall technical level of my country's powder metallurgy industry is low, and the process equipment is backward, and there is a big gap compared with the advanced technology level of foreign countries. Powder metallurgy mold technology is one of the key technologies for the production and development of powder metallurgy mechanical parts. The life of the mold not only affects product quality, but also affects production efficiency. Therefore, it is of great significan...

AI Technical Summary

Problems solved by technology

[0003] The existing rod extrusion molding dies with holes have the following problems: 1) As the pressure of the press increases when the feed inlet is fed, the gap between the core rod seat and the mold body is easy to accumulate material, resulting in the core rod seat It cannot be taken out or even the mold cannot be cleaned, and the product is dirty; 2) The fixing of the core rod depends solely on the positioning of the fixing piece, the shape and position of the core rod hole and the shape and position of the shape. When working for a long time, the position of the core rod and The position of the mold body is prone to rotational displacement, resulting in product deviation; 3) Due to the force of the mold during the pressing process, it is very time-consuming and laborious to disassemble the mold from the press after use only by manpower

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