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3.2 C¸c nguyªn c«ng c¾t

Nh÷ng nguyªn c«ng c¾t ®−îc sö dông réng r·i trong dËp tÊm nguéi, cã thÓ c¾t thÐp tÊm c¸n hoÆc thÐp cuén thμnh nh÷ng b¨ng hoÆc d¶i, c¾t nh÷ng thÐp tÊm c¸n tiªu chuÈn thμnh nh÷ng ph«i kh¸c nhau, c¾t h×nh ®Ó nhËn ®−îc c¸c lo¹i chi tiÕt ph¼ng cã h×nh d¹ng kh¸c nhau, hoÆc c¾t ph«i tr−íc khi dËp c¸c chi tiÕt kh«ng gian, rçng v.v... Ph©n lo¹i c¸c ph−¬ng ph¸p c¾t : - C¾t vËt liÖu tÊm b»ng m¸y c¾t dao song song - C¾t vËt liÖu tÊm b»ng m¸y c¾t dao nghiªng - C¾t vËt liÖu tÊm b»ng m¸y c¾t dao ®Üa - C¾t vËt liÖu tÊm b»ng khu«n - C¾t kim lo¹i b»ng c¸c ph−¬ng ph¸p ®Æc biÖt nh− c¾t b»ng khu«n cao su hay c¾t h×nh ®ét lç b»ng chÊt næ

S¬ ®å c¾t

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VÝ dô DËp vuèt c¸c chi tiÕt cèc

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VÝ dô DËp vuèt chi tiÕt hép

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VÝ dô DËp vuèt phøc t¹p (vá « t«)

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QÚA TRÌNH DẬP VUỐT

Placing the blank

Closing the blankholder

Movement of the punch

Deep Drawing

Ejection of the workpiece

Le_0219a_ba

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TỔNG QUAN VỀ PHƯƠNG PHÁP MIẾT

Miết tấm

Miết có biến mỏng

Miết khối

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3.8.2. MIẾT TẤM KHÔNG BIẾN MỎNG

Đối áp đỡ phôi

Phôi

Con lăn miết

Chặn giữ phôi

Trục nòng

Trục chính dẫn động

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3.9. NGUYÊN CÔNG ÉP CHẢY

Ép chảy thuận Ép chảy thuận

Ép chảy ngược Ép chảy ngược

Punch

Punch

Work- piece

Extrusion die

Workpiece

Bottom punch

Knock out

Konock out + bottom punch

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Ép chảy ngang Ép chảy ngang

Workpiece

Mandrel

Bottom punch

Extrusion die

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