I. Máy khoan từ là gì? Ứng dụng của máy khoan từ?
Máy khoan từ là máy khoan kim loại. Dùng nguyên tắc hút của từ tính để liên kết chặt giữa máy khoan và vật cần khoan. Trên mỗi máy khoan từ đều có bộ phận tạo ra từ tính, thông thường là nam châm điện. Cũng có thể là nam châm vĩnh cửu.
Máy khoan từ được thiết kế với kích thước nhỏ gọn, trọng lượng nhẹ, cơ động, dễ dàng di chuyển. Máy khoan từ được ứng dụng để gia công lỗ kim loại, tại các vị trí mà các loại máy khoan khác không thể làm được như khoan trên thép tấm, khoan dầm, khoan trong hốc....
Với các ưu điển vượt trội, máy khoan từ đang được ứng dụng rộng rãi trong các ngành cơ khí xây dựng như : kết cấu thép, đóng tàu, đường sắt, giàn khoan...
II. Khả năng khoan là gì, khả năng khoét là gì?
1- Khả năng khoan: Đường kính và chiều sâu tối đa của lỗ khoan khi sử dụng mũi khoan xoắn (mũi khoan ruốt gà).
2- Khả năng khoét: Đường kính và chiều sâu tối đa của lỗ khoan khi sử dụng mũi khoan từ.
III. Tác dụng của ty định tâm mũi khoan từ ?
1- Xác định tâm lỗ cần khoan.
2- Dùng để đẩy phôi ra ngoài.
IV. Lực từ của máy khoan từ là gì?
- Lực từ của máy khoan từ là lực hút của đế từ (nam châm điện hoặc nam châm vĩnh cửu) vào vật liệu cần khoan. Lực giữ này phụ thuộc vào độ dày và tình trạng bề mặt của vật liệu.
- Độ dày tối thiểu của vật liệu có từ tính phải là 12mm, vật liệu càng dày thì lực hút càng lớn. Bề mặt vật liệu phẳng và sạch thì lực hút sẽ tốt hơn
- Nhờ lực giữ này, máy khoan từ có thể làm việc trong các tư thế đứng, ngang hoặc lộn ngược.
- Khi cần khoan vật liệu không có từ tính, phải tiến hành kẹp thêm tấm sắt vào vật liệu cần khoan. Giúp đế từ hoạt động được.
Máy khoan từ m-t.com.vn
Nguồn: http://www.m-t.com.vn/
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