上海交通大学：《现代机械工程图学》教学资源_教学课件_Lec09_machining

ME250:Machining operations ME 250:Design Manufacturing I School of Mechanical Engineering Shanghai Jiao Tong University 1

Shanghai Jiao Tong University 1 ME250: Machining operations ME 250: Design & Manufacturing I School of Mechanical Engineering

Outline ■Introduction Turning Drilling ■Milling ■Machining centers Product design considerations Process planning Summary Shanghai Jiao Tong University 2

Shanghai Jiao Tong University 2 Outline n Introduction n Turning n Drilling n Milling n Machining centers n Product design considerations n Process planning n Summary

Introduction Manufacturing is preceeded by geometric design.Geometric design involves determining the dimensions and topology of a part. Manufacturing process planning determines how a product is to be manufactured and is a key element in the manufacturing process. Shanghai Jiao Tong University 3

Shanghai Jiao Tong University 3 Introduction n Manufacturing is preceeded by geometric design. Geometric design involves determining the dimensions and topology of a part. n Manufacturing process planning determines how a product is to be manufactured and is a key element in the manufacturing process

Introduction Process planning is the crucial link between design and manufacturing. ·CAD/CAPP/CAM Process planning activities are predominantly labor intensive, depending on the experience,skill and intuition of the production labor. Shanghai Jiao Tong University 4

Shanghai Jiao Tong University 4 Introduction n Process planning is the crucial link between design and manufacturing. n CAD/CAPP/CAM n Process planning activities are predominantly labor intensive, depending on the experience, skill and intuition of the production labor

Introduction In general,parts can be manufactured by Material deformation Material deposition Material removal Shanghai Jiao Tong University 5

Shanghai Jiao Tong University 5 Introduction n In general, parts can be manufactured by n Material deformation n Material deposition n Material removal

Introduction Machining process Material removal processes with cutting tools Rotating work with stationary,single point tools: turning(车削)，boring(镗孔) Stationary work with rotating,multiple point tools:drilling (钻孔)，milling(铣削)，sawing(锯削) Stationary work with reciprocating,multiple point tools: boraching(铇削) Parameters determining cutting conditions Feed:speed by which new material to be cut is "feed"to a tool Cutting speed:tool cutter (point)speed Cutting depth:depth with which new material is removed Shanghai Jiao Tong University 6

Shanghai Jiao Tong University 6 Introduction n Machining process n Material removal processes with cutting tools n Rotating work with stationary, single point tools: turning(车削）, boring（镗孔） n Stationary work with rotating, multiple point tools: drilling （钻孔）, milling（铣削）, sawing（锯削） n Stationary work with reciprocating, multiple point tools: boraching（铇削） n Parameters determining cutting conditions n Feed: speed by which new material to be cut is “feed” to a tool n Cutting speed: tool cutter (point) speed n Cutting depth: depth with which new material is removed

Introduction Machined products Shanghai Jiao Tong University 7

Shanghai Jiao Tong University 7 Introduction n Machined products

Introduction ■Machined products turning only turning milling drilling Shanghai Jiao Tong University 8

Shanghai Jiao Tong University 8 Introduction n Machined products

Introduction ■Machined products Shanghai Jiao Tong University 9

Shanghai Jiao Tong University 9 Introduction n Machined products

Turning and related operations Rotating work with stationary,single point tools Turning:external cut Boring:internal cut Shanghai Jiao Tong University 10

Shanghai Jiao Tong University 10 Turning and related operations n Rotating work with stationary, single point tools n Turning: external cut n Boring: internal cut