WEAR AND LIFE OF CUTTING TOOLS

Wear and life of cutting tools 

|  Sebastián Bulla Sebastián Niño | Materiales Industriales II | 12 de septiembre de 2015|

Introduction

In this paper the concepts of tool wear are presented of monofilament cut, establishing areas likely fail during startup Chip and phenomena accompanying wear. Wear is clearly stated edge surface of incidence of the blade setting the ratio Taylor to define the useful life of the tool. The literature for accompanying  who want to enlarge the subject as only a summary of the subject shown.

Analysis

In general, the tool wear is a gradual process, very similar wear of the tip of an ordinary pen. The rate of wear depends on the materials of the tool and work piece, tool shape, cutting fluid, process parameters (such as cutting speed, feed and depth of cut) and the characteristics of the machine tool. There are two basic types of wear, corresponding to two regions of the tool: flank wear and wear crater.

 There are three possible forms of failure in the cutting tool: to. Fails by fracture, this mode occurs when the cutting force becomes over the tip of the tool, causing a sudden fault fracture. The temperature fault, this failure occurs when the cutting temperature is gradual wear. The gradual wear of the cutting edge causes loss too high for the material of the tool, causing softening at the tip, creep and loss of edge at the edge. The shape of the tool, reducing the cutting efficiency, wears accelerated and ultimate failure of the tool, similar to the fault by temperature. Flank wear occurs in the incidence surface of the tool, and it is generally attributed to rubbing against the work surface machined, causing adhesive and / or abrasive wear, and high temperature, affecting the properties of the tool material and the work piece surface.

Crater wear occurs on the surface of attack of the tool, because it changes the geometry of the interface between chip and tool affects the cutting process. The most important factors influencing the crater wear are the temperature of the interface tool - chip and the chemical affinity between the tool and work piece materials. In addition, factors influencing flank wear also influence crater wear.So the author Taylor making a relationship that is commonly used in calculating speeds for tools and cutting tools and materials to be cut. Explaining how it has to be the process that should lead to lengthen the life span and prevent tool wear so stopping any lost production and generating an industry