1 General Mechanical Engineering General Mechanical Engineering 4.33 4.33 HCM City Univ. of Technology, Mechanical Engineering Department HCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan Tien Tien - Phan Phan Hoang Long Hoang Long + + Mẫu th thử tr trụ tròn tròn, , chi chiều dài l 0 , , di diện tí ch ch ti tiết di diện ngang ngang A 0 + + Kéo mẫu th thử bằng ng lực F, , đo đo bi biến dạng ng dài Δ Δl bi biếndạng ng 0 l l Δ = ε 0 A F = σ + + Vẽ đồ th thị quan quan hệ bi biến dạng ng - ứng ng su suất ứng ng su suất - Th Thí nghi nghiệm kéo bi biến dạng ng 0 A 0 l F r F r §3. 3. Gia Gia công ông bằng ng áp lực General Mechanical Engineering General Mechanical Engineering 4.34 4.34 HCM City Univ. of Technology, Mechanical Engineering Department HCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan Tien Tien - Phan Phan Hoang Long Hoang Long A B C D ε σ ứng suất 0 0 A 0 l F r F r + + bi biếndạng ng 0 l l Δ = ε 0 A F = σ + + ứng ng su suất → Qu Quá tr trì nh nh bi biến dạng ng của kim kim lo loại + + Bi Biến dạng ng đàn hồi ( 0A 0A) + + Bi Biến dạng ng dẻo-đàn hồi ( AB AB) + + Đi Điểm C đánh nh dấu giai giai đo đoạn mất ổn đị nh nh của qu quá tr trì nh nh kéo mẫu + + Đi Điểm D đánh nh dấu sự xu xuất hi hiện đứt gãy gãy của mẫu → kh khả năng năng bi biến dạng ng không không còn còn nữa mẫu ch chỉ bi biến dạng ng đàn hồi , , ứng ng su suất và bi biến dạng ng thay thay đổi tuy tuyến tí nh nh dỡ bỏ tải tr trọng ng → tr trở lại hì nh nh dạng ng, , kí ch ch thư thước đầu dỡ bỏ tải tr trọng ng → không không tr trở lại hì nh nh dạng ng, , kí ch ch thư thước ban ban đầu qu quá tr trì nh nh ch chảy dẽo của vật li liệu dư dưới tác dụng ng của lực
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General Mechanical EngineeringGeneral Mechanical Engineering 4.334.33
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.344.34
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.354.35
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.364.36
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.374.37
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.384.38
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.394.39
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
II. II. KKééoo ((drawingdrawing))-- PhôiPhôi đưđượợcc vuvuốốtt ddààii qua qua llỗỗ khuônkhuôn xxáácc đđịịnhnh ccóó kkííchch thưthướớcc nhnhỏỏ hơnhơn phôiphôiban ban đđầầuu. . ThưThườờngng ddùùngng chocho kkééoo dâydây đđồồngng, , kkẽẽmm, , nhômnhôm, , ……. .
-- CCóó ththểể kkééoo đưđượợcc phôiphôi rrỗỗngng hay hay phôiphôi đđặặcc
-- KhuônKhuôn bbằằngng hhợợpp kimkim ccứứngng hohoặặcc kimkim cươngcương đđểể trtráánhnh mmààii mònmòn nhanhnhanh-- GiGiảảmm ma ma ssáátt gigiữữaa khuônkhuôn vvàà vvậậtt bbằằngng ccááchch bôibôi trơntrơn ddầầuu hay graphic, hay graphic, chchếếttạạoo mmặặtt khuônkhuôn ccóó đđộộ bbóóngng caocao
General Mechanical EngineeringGeneral Mechanical Engineering 4.404.40
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
III. III. ÉÉpp ((extrusionextrusion))-- PhôiPhôi đưđượợcc nungnung nnóóngng vvàà éépp qua qua llỗỗ đđịịnhnh hhììnhnh đđểể ccóó đưđượợcc hhììnhnh ddạạngng, , kkííchchthưthướớcc yêuyêu ccầầuu
-- ThưThườờngng ssửử ddụụngng chocho ccáácc chi chi titiếếtt ccóó titiếếtt didiệệnn phphứứcc ttạạpp
General Mechanical EngineeringGeneral Mechanical Engineering 4.414.41
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
General Mechanical EngineeringGeneral Mechanical Engineering 4.424.42
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
IV. IV. RRèènn khuôn/Dkhuôn/Dậậpp ththểể ttííchch ((closedclosed--die forgingdie forging) )
General Mechanical EngineeringGeneral Mechanical Engineering 4.434.43
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
V. V. DDậậpp ttấấmm-- DDùùngng cchhààyy éépp ccáácc ttấấmm kimkim loloạạii mmỏỏngng qua qua khuônkhuôn ttạạoo rara chi chi titiếếtt vvớớii hhììnhnhddáángng mongmong mumuốốnn
General Mechanical EngineeringGeneral Mechanical Engineering 4.444.44
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
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DDậậpp ốốngng ttừừ phôiphôi ththéépp ttấấmm
DDậậpp ccốốcc
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General Mechanical EngineeringGeneral Mechanical Engineering 4.454.45
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long
VI. VI. ĐĐộộtt llỗỗ ((punchpunch))
KhuônKhuôn đđộộtt + + ddậậpp
General Mechanical EngineeringGeneral Mechanical Engineering 4.464.46
HCM City Univ. of Technology, Mechanical Engineering DepartmentHCM City Univ. of Technology, Mechanical Engineering Department Nguyen Tan Nguyen Tan TienTien -- PhanPhan Hoang LongHoang Long