A method for hot winding forming of titanium alloy thin-walled round parts
A technology for round parts and titanium alloys, which is applied in the field of hot winding and forming of titanium alloy thin-walled and round parts, can solve the problems of reducing the tensile strength of titanium alloy materials, difficult to control the springback, and complicated process, and achieves a high level of improvement. The effect of bending forming, improving forming accuracy, and simple forming process
Active Publication Date: 2022-07-29
BEIHANG UNIV
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Problems solved by technology
[0009] In order to solve the problems of difficult forming, complex process and difficult control of springback after large-angle bending of titanium alloy thin-walled profile parts, a method of thermal winding and bending of titanium alloy thin-walled full-circle parts is proposed. The self-resistance heating method continuously heats the workpiece, reduces the tensile strength of the titanium alloy material, and then performs bending forming. After the bending is completed, the workpiece is kept at a certain temperature for a period of time by using the heat preservation tool to form a high-precision one. Full round thin-walled titanium alloy parts
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Embodiment 1
[0080] In order to verify the reliability of the hot winding forming process and explore the influence of various forming process parameters on the forming quality, the springback numerical simulation analysis was carried out for L-section titanium alloy profiles.
[0081] Based on the commercial software ABAQUS, the forming process and springback process of TC2 titanium alloy profiles with a radius of 700mm at a high temperature of 700 degrees were simulated. Profile section size and material parameters such as Figure 10 , Figure 11 And as shown in Table 1 and Table 2.
[0082] Table 1 Mechanical properties parameters of TC2 titanium alloy profiles at 700℃
[0083]
[0084] Table 2 Stress relaxation parameters of TC2 titanium alloy profiles at 700℃
[0085]
[0086] The specific experimental process is: adjusting the process parameters such as side pressure, forming speed, friction coefficient, creep time, etc. to explore the springback size of the profile after ho...
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The invention discloses a method for forming a titanium alloy thin-walled circular part by hot winding, which comprises the following steps: clamping two ends of a workpiece on a fixed end fixture and a movable end fixture of a hot winding forming device; self-resistance heating the workpiece to a preset temperature ; Press the workpiece laterally inside the annular die of the mold; the mold body carries the workpiece at a predetermined strain rate of 1.0 × 10 ‑2 ‑1.0×10 ‑4 / s to rotate; stop the rotation of the main body of the mold, assemble the incubator on the rotary table, start the auxiliary heating system, and maintain the temperature of the workpiece at 500℃-750℃ to achieve high-temperature stress relaxation on the workpiece; cool the workpiece to At room temperature, the thin-walled round parts of titanium alloy are formed by hot winding. The technical scheme of the present invention can better complete the processing of the large-curvature round titanium alloy thin-walled profile, can be formed at one time, simplifies the original process flow, greatly saves the production cost, and improves the processing efficiency.
Description
technical field [0001] The invention belongs to the technical field of metal thermal processing, and in particular relates to a method for forming a titanium alloy thin-walled round part by thermal winding. Background technique [0002] Titanium alloy materials have the characteristics of high strength, low density, good mechanical properties, good toughness and corrosion resistance, and are widely used in the aerospace field. At present, the bending processes of profiles mainly include stretch bending, winding bending and rolling bending. Among them, the pulling and bending method is the most widely used profile bending process. It is thin, so it is prone to cracking defects. In addition, the forming angle of this forming method is limited, the equipment is relatively complex, and the cost is high; the winding method is also a typical bending process. The quality of the profile formed by this method is relatively high, and the forming angle is relatively It is large, simpl...
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IPC IPC(8): B21D7/16B21D7/02B21D43/00
CPCB21D7/162B21D7/024B21D43/003
Inventor 李小强王杨杨郭贵强金朝海李东升
Owner BEIHANG UNIV