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《DFMA面向制造與裝配的設計》英文版 第7-8部分（111頁）

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  《DFMA面向制造與裝配的設計》英文版 第7-8部分（111頁）

  在產品設計階段，充分考慮來自于產品制造和裝配的要求，使得機械工程師設計的產品具有很好的可制造性和可裝配性，從根本上避免在產品開發后期出現的制造和裝配質量問題。

  本附件包含以下內容：

  Product Design for Manufacture and Assembly（Third Edition）

  7. Design for Machining........................ 261

  7.1 Introduction..... 261

  7.2 Machining Using Single-Point Cutting Tools.... 261

  7.3 Machining Using Multipoint Tools................... 266

  7.4 Machining Using Abrasive Wheels................... 275

  7.5 Standardization.... 281

  7.6 Choice of Work Material........... 282

  7.7 Shape of Work Material.............284

  7.8 Machining Basic Component Shapes................284

  7.8.1 Disc-Shaped Rotational Components (L/D ≤0.5)...........284

  7.8.2 Short, Cylindrical Components (0.5 < L/D < 3)...............288

  7.8.3 Long, Cylindrical Rotational Components (L/D ≥3).....288

  7.8.4 Nonrotational Components (A/B ≤3, A/C ≥4)............... 291

  7.8.5 Long, Nonrotational Components (A/B > 3)................... 293

  7.8.6 Cubic, Nonrotational Components (A/B < 3, A/C < 4)............................. 293

  7.9 Assembly of Components......... 296

  7.10 Accuracy and Surface Finish.... 297

  7.11 Summary of Design Guidelines........................300

  7.12 Cost Estimating for Machined Components.... 301

  7.12.1 Material Cost.................302

  7.12.2 Machine Loading and Unloading........303

  7.12.3 Other Nonproductive Costs..................303

  Contents xi

  7.12.4 Handling between Machines................303

  7.12.5 Material Type.................305

  7.12.6 Machining Costs...........305

  7.12.7 Tool Replacement Costs.........................307

  7.12.8 Machining Data............308

  7.12.9 Rough Grinding............ 310

  7.12.10 Finish Grinding............. 313

  7.12.11 Allowance for Grinding Wheel Wear.... 313

  7.12.12 Allowance for Spark-Out....................... 315

  7.12.13 Examples........................ 315

  7.12.14 Machining Cost Estimating Worksheet.... 317

  7.12.15 Approximate Cost Models for Machined Components.......................... 321

  References.................. 329

  8. Design for Injection Molding........... 331

  8.1 Introduction..... 331

  8.2 Injection Molding Materials..... 331

  8.3 Molding Cycle.... 332

  8.3.1 Injection or Filling Stage........................333

  8.3.2 Cooling or Freezing Stage......................334

  8.3.3 Ejection and Resetting Stage.................334

  8.4 Injection Molding Systems.......334

  8.4.1 Injection Unit.................335

  8.4.2 Clamp Unit.....................335

  8.5 Injection Molds....336

  8.5.1 Mold Construction and Operation.......336

  8.5.2 Mold Types....................338

  8.5.3 Sprue, Runner, and Gates......................340

  8.6 Molding Machine Size...............340

  8.7 Molding Cycle Time...................343

  8.7.1 Injection Time................343

  8.7.2 Cooling Time.................344

  8.7.3 Mold Resetting..............347

  8.8 Mold Cost Estimation................349

  8.8.1 Mold Base Costs............349

  8.8.2 Cavity and Core Manufacturing Costs.... 351

  8.9 Mold Cost Point System............ 357

  8.10 Estimation of the Optimum Number of Cavities........................360

  8.11 Design Example....363

  8.12 Insert Molding....364

  8.13 Design Guidelines......................365

  8.14 Assembly Techniques................366

  References.................. 372

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  6873.77KB
• 所屬類別：
  科研開發
• 更新日期：
  2020-01-02
• 適用行業：
  機械設備與裝置；特種設備；醫療器械
• 上傳人：
  NJKY
• 標 簽：

  DFMA 面向制造與裝配的設計

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