Viscoelasto-plastic soft mode forming method of minor-radius corrugated surface thin-wall metal barrel part
A small radius, metal cylinder technology, applied in the field of sheet metal forming, can solve problems such as inability to adapt to changes in billet stress, poor wall thickness uniformity of formed parts, limited deformation, etc., to prevent cracking, good fluidity, and improve surface quality. Effect
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specific Embodiment approach 1
[0026] Specific implementation mode one: combine Figure 1 to Figure 6 Explain that the viscoelastic-plastic soft mold forming method of small-radius corrugated curved surface thin-walled metal cylinder parts in this embodiment is realized in this way:
[0027] 1. Forming the initial small-radius corrugated curved thin-walled metal tube blank, the specific steps are as follows:
[0028] Step 11: Make the primary forming die 1: firstly make the primary die blank, which is composed of two semi-concave blanks 2, and the two semi-concave blanks 2 are fastened and detachably connected; Two small-radius corrugated ring cavities 3 are processed on the inner wall of the primary die blank;
[0029] Step 1 and 2: apply a release agent on the surfaces of the two small-radius corrugated ring cavities 3;
[0030] Step one and three: making core mold 7: machining a counterbore on the central axis of one side end face of cylinder 4 and calling it piston movable chamber 6, and processing a ...
specific Embodiment approach 2
[0045] Embodiment 2: The release agents used in steps 1 and 2 and steps 2 and 2 of this embodiment are all wax-free release agents, which are beneficial for demoulding. Other method steps are the same as those in the first embodiment.
specific Embodiment approach 3
[0046] Embodiment 3: The viscoelastic plastic material 10 in step 16 of this embodiment is a high molecular polymer material with a molecular weight of 400,000 g / mol-600,000 g / mol and a viscosity of 10,000 Pa·s-16,000 Pa·s. With high strain rate sensitivity, non-uniform pressure distribution can be established on the billet surface. Other method steps are the same as those in the first or second embodiment.
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