Multi-die-core complex profile hot extrusion die

Abstract

The invention relates to a multi-die-core complex profile hot extrusion die. The multi-die-core complex profile hot extrusion die comprises a female die and a main die, wherein the female die is provided with a welding cavity, a forming cavity and a discharge cavity which are sequentially arranged and communicate with one another in the extrusion direction; the male die is provided with a main diecore, a plurality of auxiliary die cores distributed at intervals along the periphery of the main die core, a plurality of inner shunting holes distributed at intervals along the circumference and aplurality of outer shunting holes distributed at intervals along the circumference; a first forming area is formed between the forming end of the main die core and the forming cavity, a second formingarea is formed between the forming ends of the auxiliary die cores and the forming end of the main die core, a third forming area is formed between the forming ends of the auxiliary die cores and theforming cavity, and the first forming area, the second forming area and the third forming area communicate with one another; and the inner shunting holes are formed in one sides, close to the centerline of the male die, of the auxiliary die cores and communicate with the welding cavity, the outer shunting holes are formed in one sides, far away from the center line of the male die, of the auxiliary die cores and communicate with the welding cavity, and the area sum of the plurality of inner shunting holes is smaller than the area sum of the plurality of outer shunting holes. According to thescheme, the yield can be improved.

Description

technical field [0001] The present application relates to the technical field of mold equipment, in particular, to a multi-core complex profile hot extrusion mold. Background technique [0002] my country's industrial aluminum profiles account for about 30% of the total application of aluminum profiles, mainly used in the transportation industry (including automobile manufacturing, rail transit industry), equipment and machinery manufacturing, durable consumer goods industry (including light industry), etc., hot extrusion It is the earliest extrusion forming technology used in several extrusion processes. It uses the characteristics of good plasticity of the material at the hot forging temperature to perform various extrusion forming on metals. It is widely used in the production of non-ferrous metals such as aluminum and copper. Pipes and profiles, etc., belong to the scope of the metallurgical industry. [0003] Aluminum profile extrusion is a plastic processing method that...

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Problems solved by technology

[0004] At present, complex profiles (for example: profiles with through-holes on the pipe wall) are also formed through hot extrusion dies. During the process of extruding complex profiles through hot extrusion dies, the aluminum material usually first enters the peripheral cavity (the peripheral The cavity is used to form the part of the profile that is located away from the center of the through hole), and after being filled, it enters the inner cavity (the cavity is used to form the part of the profile that is located near the center of the through hole), which will cause the shape of the outer cavity to be larger than that of the inner cavity. Fast, the difference between the inner and outer cavity discharge speed is too large, resulting in a low yield

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