Thin-wall tube curvature-variable push-bending process and die

The invention relates to a thin-walled tube variable curvature bend process and relative mould. Said process comprises following steps: (1) arranging the pipe blank (2) into the straight part of variable curvature groove (41) of bend mold (4); (2) pressure machine descending moves to drive the bend...

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Hauptverfasser: XIAO XIAOTING, LIAO YIJUAN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to a thin-walled tube variable curvature bend process and relative mould. Said process comprises following steps: (1) arranging the pipe blank (2) into the straight part of variable curvature groove (41) of bend mold (4); (2) pressure machine descending moves to drive the bend punch pin (1) push the pipe blank (2) for bend transformation; (3) opening mould to attain elements (3). The moulds utilized in said invention comprises: a bend punch pin (1), a bend mould (4), a lower mould plate (5), a punch fixing plate (8), and an upper mould plate (9). Wherein, said bend punch pin (1) is mounted on the punch fixing plate (8) which is connected to the upper mould plate (9) via connection element (10); the bend mould (4) is under the bend punch pin (1) and above the lower mould plate (5); and the bend mould contains a variable curvature groove (41). Since the invention replaces traditional unchanged-curvature groove with variable curvature groove, said inventive process can distribute the integr