Novel movement recoil type hot extrusion forming and processing method

Abstract

The invention relates to a novel movement recoil type hot extrusion finish forge forming and processing method and belongs to the technical field of hot (warm) extrusion forging. According to the invention, a used hot extrusion finish forge die comprises a lower concave die, a transverse convex die base, a transverse convex die, an upper concave die, a connecting rod and an elastomer. The method comprises the step of carrying out whole downward movement on the upper concave die and the lower concave die which are closed as well as a lower die base, wherein in the downward movement process, the lower die base and a support plate are supported and connected by the elastomer; and carrying out lateral extrusion and feed of a blank on a die head through a fixed hinge formed by a support base plate and the connecting rod, and a moveable hinge formed by the connecting rod and the transverse convex die. The method disclosed by the invention has the obvious advantages that die structure is simple, dynamic distribution is reasonable, work efficiency is high, and energy is saved.

Description

technical field [0001] The invention relates to a moving recoil type centripetal hot extrusion precision forging forming and a process method, which is especially suitable for forming and processing of one-time hot (warm) forging and extrusion multi-pass pipe fittings, and belongs to hot (warm) extrusion forging technology field. Background technique [0002] The traditional hot (warm) extrusion forging die structure generally adopts the open structure of the upper and lower mold cavities. According to the principle of metal hot (warm) plastic forming, the hot (warm) metal blank is put into the fixed In the cavity of the lower mold on the press, under the action of the powerful stamping force of the cavity of the upper mold, the metal is forced to be plastically extruded from the cavity of the upper and lower molds, so as to obtain the required shape, size and heat with certain mechanical properties. Warm extrusion die forgings. Such upper and lower mold cavity structures ...

AI Technical Summary

Problems solved by technology

Such upper and lower mold cavity structures have the following disadvantages: 1. The lower potential point of the upper mold cavity determines the extrusion degree of the die forging, so the stroke of the upper mold cavity must be strictly controlled; There must be a gap between the lower critical point of the cavity and the cavity of the lower mold, so the excess metal will form a flash in the gap, thus forming the subsequent edge trimming process; Die forgings towards the hole to increase the size of the blank

At present, there are also forging dies that use the vertical positive pressure of the press to first close the upper and lower mold cavities, and then use the oil pump to provide hydraulic power to make the punch do centripetal extrusion of multi-directional holes, but this forging die also has disadvantages: 1. The structure of the mold is complex, and there are many linkage components; 2. The power of the main press is not fully utilized, and the vertical positive pressure and multi-directional extrusion force come from two power systems, resulting in energy waste

The above-mentioned die forging process is the traditional process of fixing the lower die → placing the workpiece → pressing down the upper die (some are still pressing the workpiece laterally), and the punching force of the upper die on the lower die is carried by the lower die. Effectively converted into stamping force on the workpiece; on the other hand, there is no deformation or stroke in the process of the lower die under pressure to form a rigid extrusion, which will cause greater damage to the lower die

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