Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU148700" target="_blank" >RIV/00216305:26210/23:PU148700 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41598-023-36448-y" target="_blank" >https://www.nature.com/articles/s41598-023-36448-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-023-36448-y" target="_blank" >10.1038/s41598-023-36448-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel

Popis výsledku v původním jazyce

Drilling into the solid material is one of the basic technological operations, which creates a cylindrical hole in an appropriate time with required quality. Drilling operation demands a favourable removal of chips from the cutting area because a creation of an undesirable shape of chips can impart a lower quality of the drilled hole corresponding with the generation of excess heat due to the intense contact of the chip with drill. The solution for a proper machining is a suitable modification of the drill geometry i.e., point and clearance angles as presented in current study. The tested drills are made of M35 high-speed steel characterized by a very thin core at the point of the drill. An interesting feature of the drills is the use of cutting speed higher than 30 m min(-1), with the feed of 0.2 mm per revolution. The surface roughness (Ra and Rz lower than 1 mu m and 6 mu m respectively), cylindricity (0.045 mm), roundness (0.025 mm), perpendicularity of the hole axis (0.025 mm), diameters and position of the individual holes were achieved for a drill with point angle 138.32 degrees and clearance angle 6.92 respectively. The increase of the drill point angle by 6 degrees resulted in the decrease in the feed force of more than 150 N. In addition, an increase of the clearance angle by 1 degrees resulted with a decrease in the feed force of 70 N. The results of the experiment showed that with the correct geometry of the tool the effective machining without using internal cooling can be realised.

Název v anglickém jazyce

Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel

Popis výsledku anglicky

Drilling into the solid material is one of the basic technological operations, which creates a cylindrical hole in an appropriate time with required quality. Drilling operation demands a favourable removal of chips from the cutting area because a creation of an undesirable shape of chips can impart a lower quality of the drilled hole corresponding with the generation of excess heat due to the intense contact of the chip with drill. The solution for a proper machining is a suitable modification of the drill geometry i.e., point and clearance angles as presented in current study. The tested drills are made of M35 high-speed steel characterized by a very thin core at the point of the drill. An interesting feature of the drills is the use of cutting speed higher than 30 m min(-1), with the feed of 0.2 mm per revolution. The surface roughness (Ra and Rz lower than 1 mu m and 6 mu m respectively), cylindricity (0.045 mm), roundness (0.025 mm), perpendicularity of the hole axis (0.025 mm), diameters and position of the individual holes were achieved for a drill with point angle 138.32 degrees and clearance angle 6.92 respectively. The increase of the drill point angle by 6 degrees resulted in the decrease in the feed force of more than 150 N. In addition, an increase of the clearance angle by 1 degrees resulted with a decrease in the feed force of 70 N. The results of the experiment showed that with the correct geometry of the tool the effective machining without using internal cooling can be realised.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

001009117000011

EID výsledku v databázi Scopus

2-s2.0-85161163248