Method for manufacturing large size, thin walled TC4 titanium alloy cap seal head with high precision
A high-precision, large-scale technology, applied in the direction of manufacturing tools, metal processing equipment, heat treatment process control, etc., can solve problems such as high strength, low efficiency, deformation, etc., to overcome low precision, overcome residual stress, and reduce manufacturing costs Effect
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Embodiment 1
[0017] A method for manufacturing a large-scale thin-walled high-precision TC4 titanium alloy head, which comprises the following steps:
[0018] (1) Strong rotation once: select a blank with a thickness of 10mm, and prepare a circular plate blank with a center positioning hole and a diameter of Φ650mm; preheat the mandrel to 200°C with an oxygen-acetylene torch, and clamp the blank On the preheated mandrel, there is a machining allowance of 0.5mm for the tooling surface relative to the head surface, and the entire blank is preheated to 300°C, and then the parts to be spun are heated to 750°C, and then Strong rotation to 30% of the maximum deformation. The principle of the spinning machine is to control the amount of deformation, adjust the gap corresponding to the amount of deformation, and press the blank to achieve the required size, instead of achieving the required size by controlling the pressure value. For the spinning process, the amount of deformation through the spin...
Embodiment 2
[0026] A method for manufacturing a large-scale thin-walled high-precision TC4 titanium alloy head, which comprises the following steps:
[0027] (1) Strong rotation once: select a blank with a thickness of 15mm, and prepare a circular plate blank with a center positioning hole and a diameter of Φ850mm; preheat the mandrel to 350°C with an oxygen-acetylene torch, and clamp the blank On the preheated mandrel, a machining allowance of 1 mm is left on the surface of the tooling relative to the surface of the head, and the entire blank is preheated to 500°C, and then heated to 900°C for the parts to be spun, and then strengthened. Rotate to 45% of the maximum deformation;
[0028] (2) Multi-pass general rotation: the blank obtained in step (1) is subjected to 6 passes of general rotation at a temperature of 900°C, so that the undeformed flange area of the strong-rotation blank is attached to the mandrel, shrink to form a semi-finished head;
[0029] (3) Strong rotation again: ...
Embodiment 3
[0035] A method for manufacturing a large-scale thin-walled high-precision TC4 titanium alloy head, which comprises the following steps:
[0036] (1) Strong rotation once: select a blank with a thickness of 12mm, and prepare it into a circular plate blank with a center positioning hole and a diameter of Φ750mm; preheat the mandrel to 280°C with an oxygen-acetylene torch, and clamp the blank On the preheated mandrel, there is a machining allowance of 0.8mm for the tooling surface relative to the head surface, and the entire blank is preheated to 400°C, and then heated to 820°C for the spinning parts, and then Strong rotation to 38% of the maximum deformation;
[0037] (2) Multi-pass general rotation: the blank obtained in step (1) is subjected to 5 passes of general rotation at a temperature of 800°C, so that the undeformed flange area of the strong-rotation blank is attached to the mandrel, shrink to form a semi-finished head;
[0038] (3) Strong rotation again: the semi-f...
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