Large sleeve forming die and combined extrusion forming process thereof

Abstract

The invention discloses a large sleeve forming die and a combined extrusion forming process thereof. The large sleeve forming die comprises a lower die body, a lower die base and an upper die body; an upper die connecting base is fixedly connected to the upper end of the upper die body; an upper die plate is fixedly connected to the upper end of the upper die connecting base; an upper punch is arranged on the inner wall of the upper die body; a die cavity is arranged on the inner wall of the lower die body; a positioning cylinder is connected to the bottom of the die cavity in a positioning mode; a lower punch is connected to the upper end of the positioning cylinder in a positioning mode; and a positioning base is arranged at the lower end of the lower die base. According to the large sleeve forming die and the combined extrusion forming process thereof provided by the invention, integral forging of a large sleeve product can be completed at a time, the allowance of each part of the product is uniform, redundant flash materials are not needed, the utilization rate of the materials is increased, the machining period of the product is shortened, the forging qualification rate of the product is increased, the mechanical property of the product is improved, and a better use prospect is brought.

Description

technical field [0001] The invention relates to the field of sleeve forming, in particular to a large sleeve forming die and a composite extrusion forming process thereof. Background technique [0002] Sleeve forming die is a supporting device for sleeve forming. The sleeve is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of technical casing and oil layer casing, and seal each layer of pipe The annular space between them provides a transitional connection for the installation of blowout preventers, tubing heads, and Christmas trees, and through the two side ports on the casing head body, construction operations such as re-squeeze mud, monitoring and filling of balance fluid can be carried out. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of sleeve forming molds. [0003] There are certain disadvantages in the use of the existing slee...

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Problems solved by technology

[0003] There are certain disadvantages in the use of the existing sleeve forming molds. First, flash materials need to be used, and the utilization rate of materials is poor, which is easy to cause waste. The molding may be uneven, which is not conducive to people's use. In addition, the qualified rate of product forging is reduced, and the mechanical properties used are poor, which brings certain adverse effects to people's use process. For this reason, we propose a A large-scale sleeve forming die and its compound extrusion forming process

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