Inner bore double-face boss combined extrusion molding die and molding method

Abstract

The invention provides an inner bore double-face boss combined extrusion molding die and molding method. The die comprises a male die component, a female die component and a guide component; the male die component comprises a top plate and a male die, the top of the male die is connected to the center of the bottom of the top plate, the female die component comprises a base, a female die, a central shaft and a back pushing device, the female die is matched and located with a central groove of the base, the central shaft is vertically arranged in the center of the base, the center of the female die is provided with a first location hole, the center of the male die is provided with a second location hole, the top of the central shaft penetrates through the first location hole to be inserted into the second location hole, the back pushing device comprises a plurality of back pushing rods and a back pushing disc, the plurality of back pushing rods are uniformly arranged on the back pushing disc along the peripheral direction at intervals, the tops of the back pushing rods penetrate through the base and a through hole in the female die in sequence and can slide along the through hole, two ends of the guide component are respectively connected to the bottom of the top plate and the top of the base, and the top plate can move along the guide component. The inner bore double-face boss combined extrusion molding die is concise in technological process, high in production efficiency and high in use rate of raw materials, and the surface quality of molded parts is good.

Description

technical field [0001] The invention belongs to the technical field of extrusion molding, and in particular relates to a compound extrusion molding die and a molding method with double-sided bosses in inner holes. Background technique [0002] In order to increase the strength of the gear fitting on the shaft, the double-sided boss structure is generally used on both sides of the gear. For the double-sided boss structure of the inner hole, people in the industry have been exploring, but so far it has not been concluded that the forming quality is good, easy Processing methods for mass production. Some scholars try to carry out double-sided deep drawing according to the simplest process method, but only relying on ordinary molds and simple process control cannot meet the requirements, often resulting in excessive deformation of the material, and product failure during the forming process. Fracture, and finally it is difficult to shape the ideal structure. If the round steel...

AI Technical Summary

Problems solved by technology

Using welding forming, the temperature of each part of the workpiece to be welded is uneven due to local heating. After cooling, due to the difference in thermal expansion and contraction and plastic deformation, internal stress and deformation will occur in the welded structure, and there may be cracks, pores, slag inclusions, Defects such as incomplete penetration

Among them, the most dangerous defect is the crack, which seriously affects the safety and performance of the weldment.

Therefore, although the welding process simplifies the structure of the parts, it will cause welding quality problems and cause accidents, and the weld seam will affect the appearance of the product, so this process method is actually not feasible

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