Tool Materials and Carbide Inserts Tool materials high
Tool Materials and Carbide Inserts
Tool materials - high carbon steels - high speed steel - carbide - ceramic - diamond
High carbon tool steels used for hand tools such as files and chisels l sometimes for drilling and turning etc. l
High speed steels l may be used at higher speeds (100 sfpm - in mild steel)
Cemented carbides products of the powder metallurgy process l small particles of tungsten and carbon powders mixed together with a metal of lower melting point (usually cobalt) l
Cemented carbides (Cont. ) mixture is compressed l heated to around 2600 deg F. to complete the sintering process where the cobalt melts and forms a binder or matrix around the tungsten and carbon particles l
Carbide tools most widely used tool materials in the machining industry l insert is normally brazed or clamped to the tool holder l or the entire tool is made of carbide (small mill cutters) l
Tool setup cutting tool should be exactly on center l use heaviest depth of cut possible l never stop the machine while feed is engaged l
l Insert uses
Insert wear and damage
Identification and selection of indexible inserts and tool holders
ANSI Standard identification system l Indexible Inserts
Insert Shape (Position 1)
Clearance Angle (Position 2)
Dimensional Tolerances (Position 3) inscribed circle l thickness l
Chip Breaker and Type (Position 4)
Inscribed Circle Size (Position 5)
Insert Thickness (Position 6)
Tool Nose Radius (Position 7)
ANSI Standard identification system l Tool Holders (Lathe)
Clamping Method (Position 1)
Insert Shape (Position 2)
Holder Style (Position 3)
l holder styles
holder styles l continued l
Rake Angle (Position 4)
Hand of Tool (Position 5) l Right, Neutral (Straight), Left
Shank Size (Positions 6 & 7) l in 16 ths of an inch
Insert I. C. Size (Position 8) l in 1/8 ths of an inch
Qualified Condition (Position 9)
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