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مشاور در ماشینکاری چهار و پنج محوره - پنج محوره - استفاده از ابزار کوتاه در دیواره های بلند - PowerMill

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تاریخ:سه شنبه 5 دی 1391-11:28 ب.ظ

پنج محوره - استفاده از ابزار کوتاه در دیواره های بلند - PowerMill

استفاده از ابزار کوتاه در ماشینکاری دیواره های بلند در

 Powermill

 با استفاده از ماشین های Multi Axis در صورتی که بخواهید دیواره بلندی را ماشینکاری کنید نیاز به ابزار بلند نخواهید داشت. بنا براین با استفاده از ابزار کوتاه تر و صلب تر میتوانیم ضمن صرفه جویی در هزینه ابزار ، از نرخ براده برداری بالاتر ، کیفیت سطح بالاتر و ماشینکاری یکنواخت با قابلیت تکرارپذیری بیشتر بهره مند شویم. در اینجا با ذکر مثال استراتژی های ساده 3 محور را با استفاده از این قابلیت بررسی خواهیم کرد. برای این کار از PowerMill به عنوان نرم افزارCAM استفاده خواهیم کرد.

پس از اجرای نرم افزار و وارد کردن مدل مورد نظر ، ابتدا بلوک ماده خام را تعیین میکنیم. همانگونه که در تصویر ملاحظه میکنید مدل ما دیواره هایی به ارتفاع 100 میلیمتر دارد درحالی که شعاع پایین آن 3 میلیمتر است بنابراین در ماشینکاری آن به روشهای سه محور به ابزاری نازک و بلند احتیاج خواهد بود.

جهت مشاهده ادامه روند کار به ادامه مطلب توجه فرمائید




ابتدا ابزاری سرگرد ، به قطر 5 و طول 25 میلیمتر طراحی میکنیم ؛ به صورتی که این ابزار تنها 8 میلیمتر طول برنده دارد و قطر مابقی آن 8 میلیمتر است. هلدر ابزار را مطابق با واقعیت طراحی میکنیم.  در صورتی که هندسه کلگی ماشین به گونه ای باشد که امکان برخورد آن با قطعه وجود داشته باشد ، دراین قسمت آن را بعد از هلدر اضافه میکنیم.








سپس به شکلی که در تصویر دیده میشود یک برنامه ماشینکاری ساده به روش Constant Z Finishing ایجاد کنید.






ابتدا روی برنامه ساخته شده راست کلیک می کنیم و از منوی باز شده گزینه Simulate From Start را انتخاب میکنیم. سپس در نوار ابزار Simulation بر روی ابزار Play کلیک میکنیم. همانگونه که در تصویر ملاحظه میگردد شنک و هلدر ابزار با مدل برخورد خواهد داشت.












اکنون یک بار دیگر با همین استراتژی این برنامه را ایجاد میکنیم. با این تفاوت که در قسمت Tool Axis در برگه Definition گزینه  Automatic Collision Avoidance را فعال میکنیم. با فعای کردن این گزینه برگه مربوط به آن نیز روشن میشود. در این برگه نوع Tilt Tool Axis را از منوی آبشاری مربوطه به صورت Lean انتخاب میکنیم . این بدین معنی است که اگر هلدر و یا دنباله (شنک) ابزار با مدل برخورد داشت ابزار به طرف بیرون کج  شود. به نحوی که فاصله بین هلدر و یا شنک با مدل مطابق با مقادیر وارد شده در این برگه باشد






دوباره روی برنامه به وجود آمده راست کلیک کرده و از منوی باز شونده فرمان Simulate From Start را اجرا می کنیم. در نوار ابزار Simulation دستور Play را اجرا میکنیم. ملاحظه میگردد. در هر موقعیتی که تصادف به وجود می آمده است محور ابزار در جهتی عمود بر جهت حرکت ابزار کج می ایستد.









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