不同弹丸介质对汽车传动齿轮喷丸强化有限元分析开题报告
2020-02-20 08:02
1. 研究目的与意义（文献综述）
gear transmission refers to the transmission of motion and power by the gear pair device, it is the most widely used modern equipment in a variety of mechanical transmission. its transmission is more accurate, high efficiency, compact structure, reliable work and long life. its function is to change the speed ratio and direction of the motion mechanism. in particular, automotive system is mainly used to transfer the motion and power between the two axes,which help to achieve the effect of variable torque. if the gear train transmission is adopted, some specific functions such as commutation can also be realized, and the circular speed applicable to the work has a wide range of its application. therefore, the shadow of gear transmission can be seen everywhere in the composition of the automobile.
in order to improve the intensity of gear transmission and to reduce the production cost at the same time, it is necessary to strength the treatment of the transmission gear, variety of strengthening treatment methods are available but finally we choose the simple operation, low price, good strengthening effect of peening strengthening treatment. shot blast also calls the shot peening, is to reduce fatigue,which improve the life of gears is one of effective methods. shot peening treatment is high-speed projectile flow injection to the surface of gear parts. due to plastic deformation in the surface layers of components, we form a certain thickness of reinforcement layer, which strengthened layer formed in high residual stress, the existence of the surface compressive stress when the load bearing parts can offset some of the stress, to improve the fatigue strength of gear parts.
however, the strengthening effect of different projectile medium on the gear is different in the process of shot peening. the main focus of this paper is to establish the gear model and the projectile model, then realize the process of shot peening,along with analyzing the strengthening effect of different projectile medium of shot peening method. in this way, the projectile medium with the best strengthening effect along with low cost can be determined to meet the demand for the use of auto parts. besides it improves the quality of auto products and reduce the production cost of automobiles,which upgrade the interests of enterprises.
2. 研究的基本内容与方案
2.1 design basics and objectives
(1) select appropriate gear design parameters and establish gear model amp; projectile model.
(2) the finite element method for analysis with software abaqus will be used to realize the shot peening simulation process; and the enhancement effect was viewed through post-processing.after that, the projectile material was replaced and the simulation analysis was repeated.
3. 研究计划与安排
Fig.1 Schedule
| Week | Task | Submission |
| 1-2 | Project conception, literature search and thesis proposal | Literature search, proposal report |
| 2-4 | Foreign language translation, data collection | Foreign language translation |
| 2-4 | Off-campus internship, off-campus data collection, and completion of internship report | The internship report |
| 5-7 | Design calculation and sketch drawing | Design calculation draft, sketch |
| 8-10 | Drawing drawings, writing design calculation instructions (thesis), mid-term defense | Drawing, the first draft of the paper |
| 11-14 | Drawing and design calculation specification arrangement, data bag arrangement, defense qualification examination | Formal drawings, papers |
| 15 | Students apply for defense and prepare for defense; The teacher reviews the drawings and instructions | Graduation design portfolio |
| 16-17 | Attend rejoin |
|
4. 参考文献（12篇以上）
[1]张媛媛,杨柳,陈丽辉.渗碳齿轮钢喷丸强化工艺试验研究[j].机械传动,2018,42(08):139-142.
[2]秦旭平,吴平安,王铁.喷丸强化对齿轮传动特性的影响[j].科技创新与生产力,2016(11):61-63.
[3]金荣植.喷丸强化技术在汽车制造业的应用[j].汽车工艺师,2016(01):60-63 66
