Continuous extrusion machine with symmetry plane of large surfaces of expanded cavity perpendicular to axis of extrusion wheel

Abstract

The invention belongs to equipment used for continuous extrusion and discloses a continuous extrusion machine with a symmetry plane of large surfaces of an expanded cavity perpendicular to an axis of an extrusion wheel. A divergent die is arranged behind a cavity feeding hole and the expanded cavity; a die is arranged behind the divergent die; the divergent die and the die are fixed in the cavity through a cavity cover; the cavity cover and the cavity are connected through a screw; the axis of the extrusion wheel is basically perpendicular to the symmetry plane of large surfaces of the expanded cavity; and a divergent die with a splayed divergent groove is arranged between the die and the expanded cavity. Generally speaking, according to the invention, the expansion direction of the expanded cavity is changed into a direction perpendicular to a traditional expanded cavity, extrusion of copper bar products is changed from an original horizontal mode to a vertical mode, the cavity feeding hole is greatly enlarged in the arc tangential direction, and the flow velocity of a blank in the cavity die is adjusted by utilizing the divergent die, so that the extruded products are kept straight.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing and relates to equipment for continuous extrusion. Background technique [0002] Existing continuous extrusion equipment produces large-width products, all of which adopt a single-wheel single-groove or single-wheel double-groove structure, and the plane of the product width direction is parallel to the axis of the main shaft, that is, the large plane of the extruded product is parallel to the axis of the main shaft . The width of the product is limited by the width of the shoe seat and the width of the frame. If you want to produce large-width products, you must increase the width of the shoe seat to ensure that the shoe seat has sufficient strength and rigidity. Increasing the width of the shoe seat will inevitably increase the width of the frame. Wide, which will increase the span of the support point of the spindle system and deteriorate the rigidity, which will reduce the life of t...

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Problems solved by technology

The width of the product is limited by the width of the shoe seat and the width of the frame. If you want to produce large-width products, you must increase the width of the shoe seat to ensure that the shoe seat has sufficient strength and rigidity. Increasing the width of the shoe seat will inevitably increase the width of the frame. Wide, which will lead to the increase of the span of the support point of the spindle system and the deterioration of the rigidity, which will lead to the reduction of the life of the parts of the spindle system

In order to prevent the oxidized overflow on the surface of the extrusion wheel from entering the product, when there is generally a high requirement for product quality, the width of the cavity feed port is generally less than or equal to the width of the groove of the extrusion wheel, which is It is determined that the size of the feed port of the expansion cavity must be close to the diameter of the blank in the expansion direction of the cavity. If you want to make a wide-width product, you must use a large-diameter round rod as the blank. The increase in the diameter of the blank will cause equipment The torque, radial load and other equipment loads become larger. Therefore, the diameter of the extrusion wheel must be increased, and the diameter of the main shaft must be increased to bear the extrusion load. This leads to a rapid increase in the motor and gearbox, making the production of large-width continuous extrusion machines less efficient. very large and expensive

With the increase of the extrusion machine, the weight of the tooling and molds of the extrusion machine, such as the extrusion wheel and the cavity, also increases rapidly, which leads to a substantial increase in manufacturing costs, making the operating cost of large equipment significantly higher than small equipment

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