ME364_cutting_wear - Valery Marinov Manufacturing...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Tool Wear and Tool Life 77 Valery Marinov, Manufacturing Technology Introduction The life of a cutting tool can be terminated by a number of means, although they fall broadly into two main categories: gradual wearing of certain regions of the face and flank of the cutting tool, and abrupt tool failure. Considering the more desirable case the life of a cutting tool is therefore determined by the amount of wear that has occurred on the tool profile and which reduces the efficiency of cutting to an unacceptable level, or eventually causes tool failure (case ). When the tool wear reaches an initially accepted amount, there are two options, to resharpen the tool on a tool grinder, or to replace the tool with a new one. This second possibility applies in two cases, (i) when the resource for tool resharpening is exhausted. or (ii) the tool does not allow for resharpening, e.g. in case of the indexable carbide inserts discussed in Section 5.8 . Wear zones Gradual wear occurs at three principal location on a cutting tool. Accordingly, three main types of tool wear can be distinguished, crater wear flank wear corner wear These three wear types are illustrated in the figure: 5.5 TOOL WEAR AND TOOL LIFE Crater wear Chip contact area Major cutting edge perfectly sharp at the beginning of cutting worn after cutting for some period of time Flank wear Corner wear VB Tool cutting part Types of wear observed in cutting tools
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Tool Wear and Tool Life 78 Valery Marinov, Manufacturing Technology v Crater wear : consists of a concave section on the tool face formed by the action of the chip sliding on the surface. Crater wear affects the mechanics of the process
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern