Cutting Edge Microgeometry and Preparation Methods

Abstract

The paper deals with the issue of cutting edge preparation and tool treatment before the coating and their influence on the tool life of coated cutting tools. The aim was to examine the influence of cutting edge radius sizes on the tool life of cemented carbide turning inserts. Theoretical analysis was focussed on the issue of cutting edge microgeometry, discussing the classification and importance of cutting edge microgeometry. The most famous and used edge preparation methods are summarized in article along with the results of current research of famous tool companies and institutions. In this article, the tool lives of cemented carbide turning inserts which were prepared by several methods were compared. Cemented carbide turning inserts were deposited by AlCrSiN nanocomposite hard coating. Long-term tool live tests were carried out on DMG CTX alpha 500 turning centre. The tool wear of cemented carbide turning inserts was measured on Dino-Lite digital microscope during the turning. The tool lives of prepared cemented carbide turning inserts with required cutting edge radius and unprepared ones were compared. These results were investigated in the process of machining of austenitic stainless steel material X6CrNiTi18-10 by DIN EN (AISI 321), which shows higher strain hardening tendency.

Enhancement of cured cement using environmental waste: particleboards incorporating nano slag

“…In the specimen preparation of this section and the following ones, 20-minutes vacuum were applied before CO 2 injection, and the CO 2 flow rate was 10 L/min. To ensure whether the accelerated carbonation took place or not, the textural study of the fractured surface for all specimens was performed on a (SEM Model: TESCAN-VEGA/USA) with tungsten source and detector X-Flasb 5030, which operates at a voltage of 1-20 kV with a range of between 10 and 80,000 magnification, at a work distance from 1 to 20 mm [25]. In addition, concrete samples from different mixtures were analyzed using X-ray diffractometer (XRD) analysis to characterize their reaction products.…”

Influência da preparação de aresta e do avanço na usinagem do aço VP20TS

“…Os resultados apontaram para uma melhoria de vida útil das ferramentas com arestas preparadas por eletroerosão, comparáveis a resultados obtidos por outros autores, citados anteriormente, que utilizaram técnicas convencionais de preparação de aresta. Os autores apontam, como uma das causas para a melhoria da vida útil das ferramentas com arestas preparadas, menores valores de temperatura máxima alcançada, produto da melhor dissipação de calor proveniente da preparação das arestas de corte VOPÁT et al, (2017). prepararam insertos de metal duro com três diferentes valores de raio de aresta (24 μm, 44 μm e 64 μm), através de duas diferentes técnicas, escovamento e microjateamento.…”