انواع اتصالات در صنعت
- اتصالات دائم : مثل جوش ، پرچ و مانند اینها که بعد از برقراری اتصال ،قطعات دیگر به راحتی قابل جدایش نیستند و اگر آنها را جدا کنیم علاوه بر اتصال دهنده ، قطعاتی که به هم چسبیده اند آسیب می بینند .
- اتصال موقت : بعضی قطعات نیاز به باز شدن و مراقبت و نگهداری دارند و به دفعات باید باز و بسته شوند به این گونه اتصالات ،اتصالات موقت می گویند. مزیت این نوع اتصال این است که به دفعات میتوان آنها را باز و بسته کرد بدون این که قطعه و یا اتصال دهنده آسیب ببیند . هرچند با توجه به عمر مفید اتصال دهنده ها و حساسیت مقاومت ایجاد شده در قطعه ،اتصال دهنده ها را بعد از مدتی تعویض می کنند . از نمونه اتصالات موقت می توان پیچ و مهره ، خار و پین ، خارفنری و فنر را نام برد .
خود اتصالات موقت به دو دسته تقسیم می شوند :
اتصالات دنده ای ( پیچ و مهره )
یکی دیگر از انواع اتصالات هستند که ، از دنده برای وصل کردن قطعات استفاده می شود . اتصالات دنده ای چهار کاربرد مهم دارند :
- نگهداری قطعات نسبت به هم : بیشترین کاربرد این اتصالات ، اتصال قطعات به یکدیگر است . و قطعات را در یک موقعیت معین نسبت به هم نگه می دارد .
- پیچ های انتقال حرکت و قدرت : در بعضی از دستگاه ها از اتصال دنده ای برای انتقال حرکت و یا انتقال نیرو استفاده می شود . که شامل جک ماشین ها ، گیره های دستی و رومیزی و مانند اینها می باشد .
- اندازه گیری های دقیق : در بعضی از دستگاه های اندازه گیری ، از این اتصال دهنده برای سنجش دقیق استفاده می شود . برای مثال در میکرومتر ، فک متحرک ، یک پیچ با گام ظریف است و ورنیه آن نقش مهره را دارد .
- تنظیم موقعیت دقیق قطعات نسبت به یکدیگر : در بعضی از دستگاه ها برای تنظیم فاصله بین دو قطر و یا هم مرکز کردن اجسام دوار ، از اتصالات دنده ای استفاده می کنند .برای مثال در هم مرکز کردن یک رینگ که داخل آن یک شفت قرار دارد ، از سه پیچ استفاده می شود (سه نظام).
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