《DFMA面向制造与装配的设计》英文版 第7-8部分（111页）

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  《DFMA面向制造与装配的设计》英文版 第7-8部分（111页）

  在产品设计阶段，充分考虑来自于产品制造和装配的要求，使得机械工程师设计的产品具有很好的可制造性和可装配性，从根本上避免在产品开发后期出现的制造和装配质量问题。

  本附件包含以下内容：

  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

• 资料大小：
  6873.77KB
• 所属类别：
  科研开发
• 更新日期：
  2020-01-02
• 适用行业：
  机械设备与装置；特种设备；医疗器械
• 上传人：
  NJKY
• 标 签：

  DFMA 面向制造与装配的设计

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