Large three-way joint die forging device for power station equipment and die forging method thereof

Abstract

The invention discloses a large three-way joint die forging device for power station equipment and a die forging method thereof. The key point of the technical scheme is as follows: the large three-way joint die forging device for power station equipment comprises a bottom plate, a lower die and an upper die wherein the lower die comprises a main cavity, a first branch cavity and a second branch cavity, the main cavity, the first branch cavity and the second branch cavity are semi-cylindrical, the upper die corresponds to the lower die in structure, and the lower die and the upper die are encircled to form a chamber for forming a large Y-shaped three-way joint; the bottom plate is connected to a trunk propelling device, a first branch blocking device and a second branch blocking device, and the first branch blocking device and the second branch blocking device are consistent in structure and correspond to the first branch cavity and the second branch cavity, separately. The large three-way joint die forging device improves the percent of pass of forged large Y-shaped three-way joints, shortens the production period while improving the reliability, lowers the operation cost of the equipment and improves the enterprise benefit and competitiveness.

Description

technical field [0001] The invention relates to the field of die forging of large tees, in particular to a large tee die forging device for power station equipment and a die forging method thereof. Background technique [0002] The large Y-shaped tee is one of the very important core components in the current thermal power generation and nuclear power generation systems. Its functions are, for example, used to transmit and divert high-temperature and high-pressure water vapor. With the continuous development of my country's power generation industry, the demand for large-scale tees is increasing. In addition to ensuring excellent performance, the requirements for tees are also higher and higher for processing cycle and production costs. Require. [0003] The current large-scale Y-shaped tee products mainly include two production methods: free forging and die forging. The free forging method is generally to use a large hydraulic press for free forging combined with machining...

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Problems solved by technology

[0004] When the free forging method is used to forge the whole Y-shaped tee, the material utilization rate is low, resulting in a great waste of materials, and increases the production cost, and the production cycle is also long, which is not suitable for mass production

[0005] When die forging is used to forge the whole Y-shaped tee, if no insert is set on the Y-shaped branch, the workload of machining and drilling in the later stage will be large; if the insert is set to extend into the mold, due to the high temperature of the metal Due to the fluidity problem, the metal may not flow perfectly according to the preset state and fill the gap between the insert and the inner wall of the mold during extrusion, nor can it form a cylindrical hole in the shape of the insert, resulting in unqualified forged products

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