70 Каталог MITSUBISHI 2015 Токарный и вращающийся инструмент Инструментальные решения Стр.A028

Каталог MITSUBISHI 2015 Металлорежущий инструмент Стр. A028 0070 ENG Lab2u

TURNING INSERTS TURNING INSERTS WIPER INSERT What is a Wiper Insert The wiper insert is designed with a wiper edge that is situated where the straight edge meets the corner radius. In comparison to conventional breakers the surface finish does not deteriorate even if the feed rate is doubled. Machining at high feed rates improves cutting efficiency. Wiper (Improving Surface Finish Under the same machining conditions as conventional breakers but with the feed rate increased the surface finish of the workpiece can be improved. (Improving Efficiency High feed rates not only shortened machining times but also make it possible to combine roughing and finishing operations. (Increased Tool Life When a change to high feed conditions the time required to cut one component is decreased thus more parts can be machined with each insert. In addition the high feed rate prevents rubbing therefore delaying the progression of wear and increasing the tool life of the insert. Mmproving Chip Control Under high feed conditions the chips generated become thicker and are more easily broken thus chip control is improved. Wiper insert + is Finished surface Same surface roughness Standard insert + The conventional feed condition Please use a wiper insert at high feed rate. Cutting Conditions Workpiece JIS S45C Insert CNMG120408-00 Cutting Speed200m/min Depth of Cut 1.5mm Feed Speed0.2-0.6mm/rev Wet Outer Diameter Cutting ExThe surface roughness does not deteriorate even if the feed rate is doubled (o.3-o.6) IA wiper insert + machining at high feed rate Reduced machining time (per workpieces) Increased number of workpieces (per definitive time period) Improving chip control IA wiper insert + machining at conventional feed rate Eliminating the finishing step by roughing and finishing together (Separate roughing and finishing steps -) Single-step machining) Reducing cycle times Increased productivity Avoiding Line-Stoppage The realization of Reduced Costs The estimate of finished surface roughness when using a wiper insert The effects of wiper inserts on external machining boring and facing. The surface roughness when machining at corner R or taper angle over 5 is the same as machining with standard inserts. Rz(W)Rz 0.5 Rz(W)Finished surface roughness when using a wiper insert. Rz Finished surface roughness from conventional conditions. (When using a standard insert) Effective uses of a wiper insert Non effective uses of a wiper insert Special attention is not necessary when using CNMG WNMG CCMT types No Restriction for Holders A standard holders can be used. ( A double clamp high rigidity tool is recommended.) End Cutting Angle Non h. 95' The CNMG type can be used as a wiper at the 100comer. Not Necessary to Adjust the Machining Programme Conventional machining programmes can be used. (The CNMG WNMG CCMT types are based on the ISO ANSI.) Special attention is necessary when using the DNMX TNMX types due to the special top face geometry Restriction for Holders Use a holder with end cutting angle 93 for improving wiper efficiency. A holder with end cutting angle 91 can improve wiper efficiency (see the following figure) however there is no wiper efficiency with other end cutting angles (60 90 107etc.). Tha hole geometry of the DNMX and TNMX type are the same as the DNMG and TNMG types. The "X" represents tha special geometry of the Corner point. Ex):Theoretical surface roughness of holders in using the TNMX160412-MW. 0.2 0.3 0.4 0.5 Feed f (mm/rev) Necessary to Adjust the Machining Programme When machining errors occur please adjust the programme. (The DNMX-TNMX types are not based on the ISO ANSI. Please refer to the next page.) Adjustment necessary Example of insert point A028