Machinability_poster

Product catalog summary

Overview: This document provides a structured approach to understanding the relationship between workpiece material properties and machinability. It highlights the importance of specific material characteristics in determining machinability and offers insights into tool selection and cutting conditions.

1. Workpiece Material Properties: The document outlines how different material properties affect machinability. For instance, high strain hardening and low thermal conductivity significantly impact the machinability of materials like Inconel 718.

2. Workpiece Material Classification (SMG Version 2): Materials are classified based on their properties and machinability challenges. Key classifications include:

ISO-P: Focus on achieving conditions for energy-efficient machining.
ISO-H: High hardness leads to mechanical and thermal loads on cutting edges.
ISO-K / ISO-S: High abrasiveness causes scratching effects.
ISO-M / ISO-S / ISO-N: High adhesion tendency and ductility result in poor chip formation and built-up edge formation.
ISO-M / ISO-S: High strain hardening and low thermal conductivity lead to localized high loads and high temperatures in the cutting zone.

3. Machinability Polar Diagram: This visual tool illustrates the influence of five critical material properties on machinability, using Inconel 718 as an example. The diagram highlights the impact of adhesion, abrasiveness, strain hardening, low thermal conductivity, and hardness.

4. General Recommendations: The document provides guidance on tool selection and cutting conditions based on material properties. Recommendations include:

Using tough coatings and materials with high compressive strength for cutting tools.
Controlling temperature through low cutting speeds and high feed rates.
Adapting cutting edge geometry to manage tool wear and enhance performance.

Catalog excerpts

MACHINABILITY & WORKPIECE MATERIAL PROPERTIES OUR MAIN TARGET: LINK WORKPIECE MATERIAL PROPERTIES TO MACHINABILITY 1. WORKPIECE MATERIAL PROPERTIES 2. WORKPIECE MATERIAL CLASSIFICATION (SMG VERS. 2) ISO MAT. GROUP Main workpiece material property Most important with materials Biggest machinability issue Average material properties Achieve conditions for free cutting (energy eficient machining) High hardness High mechanical and thermal loads on the cutting edges High abrasiveness ISO-K / ISO-S High scratching effects on the cutting surfaces High adhesion tendency and ductility ISO-M / ISO-S / ISO-N Bad chip formation and formation of built-up edge on the cutting edge High strain hardening factor ISO-M / ISO-S Local high loads on cutting edges ISO-M / ISO-S High temperatures in the cutting zone 3. MACHINABILITY POLAR DIAGRAMME A machinability polar diagramme visualises the inﬂuence of ﬁve important material properties on the machinability. Below is an example for Inconel 718. In this example can be observed that mainly the high strain hardening and the low thermal conductivity of this material determines the machinability of the material. Adhesion 100% 80% 60% 40% Strain hardening 1. THIS MATERIAL PROPERTY: High adhesion / ductility High strain hardening tendency High hardness High abrasiveness High localised loads High temperatures in cutting zone High mechanical and thermal loads Micro chipping (BUE) Flaking, notch wear Plastic deformation Chipping / notching Plastic deformation High wear rate Plastic deformation Chipping / breakage Flank - crater wear Notching 3. ... LEADS TO Tool wear 4. GENERAL RECOMMENDATIONS FOR TOOL SELECTION AND CUTTING CONDITION SELECTION Cutting material Toughness Tough coating High compressive strength Hard or tough (feed dependant) Abrasion resistance Cutting conditions Temperature control Low cutting speed High feed and DOC Low cutting speed and feed Low speed and feed High DOC Cutting geometry Sharp edge radius High rake angle Small nose radius Adapted cutting edge geometry High rake angle, strong cutting point and edge Small rake angle Cutting edge strength This overview represents a generic approach to link workpiece material properties to general machinability rating. For more detailed analysis of machinability ratings for speciﬁc workpiece materials, please contact your business partner at Se

Open the catalog to page 1

All SECO TOOLS catalogs and technical brochures

Archived catalogs

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list