Influence of form Factor of the Cutting Edge on Tool Life during Finishing Milling

“…cutting resistances), which are identical to the cutting forces of the opposite direction. In Figure 1b), these cutting resistances are marked F c´, F f´ and F p´ [1,2,3].…”

Section: Conditions Of the Experimentsmentioning

confidence: 99%

Effect of Chip Breakers on the Cutting Force During the Machining of Steel C45

Kratochvíl

Petrů

Pagáč

et al. 2017

“…[14] CBN classes are recommended for machining of materials with hardness above 45 HRC; they are suitable primarily for machining of highly alloyed steels and special alloys that are hard to machine with commonly available tools. For materials with hardness of 55 HRC CBN is the only tool material that can substitute grinding [3,11,13]. …”

Section: Cutting Tool Made Of Cbnmentioning

confidence: 99%

Mechanisms of Cutting Blade Wear and Their Influence on Cutting Ability of the Tool During Machining of Special Alloys

Zlámal¹,

Petrů²,

Vortel³

et al. 2016

With increased requirements for quality and shelf life of machined parts there is also a higher share of the use of material with specific properties that are identified by the term "superalloys". These materials differ from common steels by mechanical and physical properties that cause their worse machinability. During machining of "superalloys" worse machinability has negative influence primarily on the amount of cutting edge wear, which shortens durability of the cutting tool. The goal of experimental activity shown in this contribution is to determine individual mechanisms of the cutting edge wear and their effects on the cutting ability during high speed machining of nickel superalloy. A specific exchangeable cutting insert made from cubic boric nitride was used for machining of the 625 material according to ASM 5666F. The criteria to evaluate cutting ability and durability of the cutting tool became selected parameters of surface integrity and quality of the machined surface.

“…The depth of the penetrating X-ray beam is 8-12 microns, depending on the voltage on the lamp. Machined material was bearing steel 100Cr6, [14,15,16], the microstructure is shown in Figure 4.…”

Section: Condition Of the Experimentsmentioning

confidence: 99%

Surface Integrity Evaluation of Turning With Auto-Rotating Tool

Struharňanský¹,

Kordik²,

Martikáň³

et al. 2016

The technical practice requirements comes to have increased demands on higher productivity, speed and quality of the machining process of various materials. Hard to machine materials, whose machining led to the development of turning with rotating cutting edge are not an exception. The machining process of auto-rotating tool is more complicated than the conventional process of turning, especially for the process of reshaping cutting layers into chips. There is a significant load in the system, that may affect the life of the cutting edge of the tool as well as the whole system and also in the final extent of the qualitative parameters of the workpiece (product / product). The article specifies the knowledge and findings of measurement in machining material 100Cr6 with an auto-rotating tool. The measurements were conducted to evaluate the integrity of the surface (roughness) of the workpiece to the impacts of cutting conditions, in particular the feed and the cutting edge inclination. It also analyzes the presence (size, character, action) of residual stresses concentrated in the surface layers of the workpiece by changing the cutting conditions.