Integral punching and extrusion compound forming die and forming method of tapered nozzle bushing plate

Abstract

The invention provides a conical-spout bushing plate integral punching extrusion compound forming die and a forming method. The conical-spout bushing plate integral punching extrusion compound formingdie comprises a female die, an embedded sleeve, a first extrusion female die, a second extrusion female die, an extrusion male die, a first stamping male die, a second stamping male die, a third stamping male die and a fourth stamping male die. Each die is replaced and used in different technological stages respectively. The forming method comprises the steps that a regular metal plate is placedin a die cavity formed in a press machine, a technology with extrusion and stamping combined is adopted and a baseplate and a discharge spout are integrally formed, and a blank is in a strong three-way compressive stress state, and generation of cracks in the forming process is avoided. The conical-spout bushing plate integral punching extrusion compound forming die and the forming method are characterized in that the forming precision is high, the machining process is simple, and production efficiency is high.

Description

technical field [0001] The invention relates to the field of sheet material volume forming, in particular to a method for integrally punching and extruding compositely forming a tapered leak nozzle on a sheet material. Background technique [0002] The bushing is the core component used in the glass fiber production process, and its forming quality directly affects the molding quality of the glass fiber, the drawing efficiency and the service life of the bushing. In order to improve the output and production efficiency of glass fiber, the leak plate nozzle has developed from 100 holes in the early stage to 800 holes, and then to 6000 holes. The forming quality and performance of the bushing put forward higher requirements. [0003] The existing bushing forming methods are roughly divided into two types. One is separate forming, that is, the leak nozzle and the bottom plate are processed separately, assembled and assembled and then welded. The key of this method lies in th...

AI Technical Summary

Problems solved by technology

Regarding the assembly and welding technology of the leak nozzle and the bottom plate, Yang Xingwu and Li Xiaofu pointed out: the early hydrogen-oxygen welding process, the thermal deformation of the bottom plate is serious, the structural size of the leak nozzle is affected, and the service life of the assembled bushing is short; Welding methods, such as electron beam welding, laser welding, etc., can reduce the area affected by thermal deformation and improve the forming quality of the bushing, but the investment in equipment is large and the production cost increases (Yang Xingwu, Li Xiaofu. Manufacturing method of drawing bushing in pool kiln and development direction. Glass Fiber, 2007(3):21-26.)

Therefore, the main problems of the separate forming method are: poor consistency of the shape and size of the leak nozzle; large thermal deformation of the bottom plate during welding, affecting the structural size, and reducing the strength of the leak nozzle; large material loss, low production efficiency, and cost input. Big

This technology is simple and easy to implement, and can form shallow cylindrical parts as a whole, but it is difficult to form leaky components with large height-to-diameter ratio

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