TAILIEUCHUNG - Machinability and Surface Integrity Part 8

Tham khảo tài liệu 'machinability and surface integrity part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machinability and Surface Integrity 339 the cutting insert or tool they are most familiar with because they know - from practical experience - that it performs and wears in a progressive manner rather than the unpredictability associated with an insert of uncertain machining capability that might otherwise prematurely fail. Prior to discussing criteria for determining when a cutting insert is worn-out it is necessary to establish in practice what this actually means. For example does worn-out refer to when the dimensional accuracy becomes unpredictable or if the surface finish has significantly deteriorated or perhaps the fact that its automatic chip-breaking behaviour has become inefficient In many situations it is by the user s experience that one can judge how much flank wear can be tolerated on the cutting edge before machining is discontinued. As a rule flank wear is a dependable criterion for assessing when the cutting edge is effectively worn-out. Moreover from the previous discussion perhaps the degree of cratering may in certain machining circumstances prove to be more significant than the flank wear in respect to the shortening tool life. Tool wear can be established by several techniques but the usual method is to observe and then measure the actual wear as it progressively develops. The effective cutting time or tool life T is specified as time-elapsed prior to a predetermined degree of wear has been reached. A typical procedure for determining flank wear can be to observe cutting edge s in-situ on the machine tool then remove from the machine and visually inspect the tooling followed by its respective wear rate can then be optically magnified in suitable equipment allowing accurate dimensional measurement - against the following criterion . see Fig. 174 Extent of flank wear from original edge - if this wear is of relatively uniform nature it may be distributed across three zones A B and C . The mean flank wear Vb C-a is measured over the cutting .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.