| WANG Chen-yu,LI Jin-quan.Influence of Feed on Surface Quality in Titanium Alloy Cutting Process Based on Dynamic Mechanical Model Analysis[J],48(6):370-375 |
| Influence of Feed on Surface Quality in Titanium Alloy Cutting Process Based on Dynamic Mechanical Model Analysis |
| Received:February 01, 2019 Revised:June 20, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.06.045 |
| KeyWord:feed rate surface quality cutting force cutting vibration dynamical model |
| Author | Institution |
| WANG Chen-yu |
School of Mechanical Engineering, Shenyang Ligong University, Shenyang , China |
| LI Jin-quan |
School of Mechanical Engineering, Shenyang Ligong University, Shenyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to establish the dynamic model of single-degree-of-freedom in workpiece-tool vibration system so as to quantitatively study the influence of feed on cutting force and vibration acceleration of titanium alloy Ti-6Al-4V. The single factor test of changing the feed rate was adopted. Ti-6Al-4V titanium alloy was turned by coated hard alloy tool. The cutting vibration and cutting force in the cutting process were tested by DYTRAN acceleration sensor and YDCB-II105 three-dimensional piezoelectric force measuring system. The collected vibration acceleration and cutting force signals were processed and analyzed by MATLAB and Origin software. The surface roughness was measured by 120 mm Talysurf PGI840 roughness tester. When the feed rates was 0.1, 0.15, 0.2, 0.24 and 0.3 mm/r, respectively, the mean square roots of the vibration acceleration were 0.2413g, 0.3299g, 0.3945g, 0.4468g and 0.5737g, respectively, the average arithmetic heights of Ra was 0.538, 0.9391, 1.4778, 1.984 and 3.0117 μm, respectively and the average valley depth Rz was 3.1846, 4.64445, 6.3059, 8.338 and 11.6506 μm, respectively. With the increase of the feed, all of the cutting force, vibration acceleration and the surface roughness increased. The contact area between the tool and the workpiece increases with the increase of feed rate, which leads to the increase of the friction force and the steady-state component of the cutting force. From the dynamic model of the workpiece-tool vibration system, the vibration acceleration increases with the increase of the steady-state component of the cutting force, thus causing bigger tip displacement and resulting in that the surface roughness increases with increase of the feed rate. |
| Close |
|
|
|