Loading...
Please wait, while we are loading the content...
New sharpening method and the behaviour of the multi-flute twist drill with curved cutting edge in machining operations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Baroiu, Nicușor Teodor, Virgil Gabriel Berbinschi, Silviu Susac, Florin Oancea, Nicolae |
| Copyright Year | 2016 |
| Abstract | Twist drills with variable cutting edge angle, decreasing from axis to periphery, ensure evenly distributed energetic load per unit length of the cutting edge. This has a positive impact on the cutting capabilities of the tool. The present paper proposes a new model of the twist drill with three flutes and variable cutting edge angle along the major cutting edge. For this type of tool, the major cutting edge is an arc. Increasing the number of the drill’s cutting lips improves the cylindricity of the machined hole. Subsequently, a new hyperboloidal sharpening method was created by analyzing the variation of the flank angle along the major cutting edge and the helical flute shape. Drills with three curved cutting edges, made of high speed steel (HSS), are tested under the same working conditions as standard drills, taking into account the main flank face wear the VB criterion, the roughness of the machined surface the Ra criterion, and the values of the axial force and torque for the machining of A570 carbide steel. Drills with three curved cutting edges have improved durability compared to standard drills. Our tests show that the roughness of the machined surface is improved for drills with curved cutting edges. Based on our observations, curved cutting edges lead to a reduced value of the axial force but to an increased value of the torque. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://nopr.niscair.res.in/bitstream/123456789/42180/1/IJEMS%2023(5)%20357-369.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
