- 上一篇：热电传感元素英文文献和中文翻译
- 下一篇：计算机辅助工艺规划CAPP系统英文文献和中文翻译
As for bearings, roller bearings (ball bearings,single row-deep groove) are chosen with the specification in Table 4. The Pin and spring are specified in Table 5 and 6 respectifely.
Based on the results of testing by varying the rotational speed and test materials, the power requirements for 5(five) drilling chisels that work in conjunction, can be seen in Table 7.
It can be observed from Figure 9 that the power consumption is needed for the higher rotation. As for teak wood, the rotation of 250 rpm and 600 rpm consume the power of 26.5 W and 600 W, respectively.Motor rotation speed has significant effect to cutting speed, force and torque. The greater the motor rotation,the higher the cutting speed. However, the power demand also increase of force and torque.
By observing Figure 9, it can be known that there are some differences on the power requirements for different materials. Cast iron consumens the higher while teak wood pays the lower one for the some motor rotation due to the different of mechanical properties.
The differences between the two drill machines lies on the construction design. The first type is the gang drill machine with one motor and five chisel. A single main shaft with four driven-shaft and four link-gear are used as the power transmission system. On the other hand, the scond type, ehich is the original machine used by small business, uses a motor with single chisel and the driven-shaft only.
Figure 10 reveals as the power requirement for manufacturing five holes on the different material using the two type gang drill machines (see Figure 11), while Figure 12 inform the time needed to finish that tasks. When five chisel work simultantly using gang drill machine, both time and power requirement are reduced compare to drilling process using single chisel.Therefore,gang drill machine has increased productivity and efficience of birdcage manufacturer.
IV. CONCLUSION
1. Prototype of gang drill equipped with a jig & fixture,has been made and tested. Testing should that the machine can be functionalized properly.
2. The higher the motor rotation, the greater of power needed. For teak wood at 250 rpm requires power of 26.5 W. At the higher rotaton of 600 rpm, greather power of 600 W consumed.
3. Power requirements of the drilling process, depends on the mechinal properties of materials. Materials with higher mechanical properties consume more power in order to accomplish the process than lower ones. For rotation at 400 rpm, teak wood need power of 43.6 W only while cast iron spending power of 569.7 W
4. Power requirements to make 5 holes for teak wood using gang drill machine with 1 motor and 5 chisels is lower than the ordinary/original machine 1 motor and 1 chisel.
5. The drilling time to make 5 holes using gang drill machine is shorter than the ordinary machine.
摘要：目前，钻这种直径小钻孔深的技术还并不理想。主要因为生产能力受限。由于排屑不良、刀具容易损毁和加工表面精度低等原因，大大限制了生产率的提高。实践中，常使用循环加工和运用润滑剂作为解决方案。但是会有引起环境问题和影响生产能力等缺点。这就有了使用振动钻销头的替代方案。与传统的加工过程相反，在适当使用条件下对钻头设计的调整，提高了钻销的轴向稳定性。本文在钻子动力学的基础上，详细阐述了高速主轴/钻头/刀具的系统模型。在本文中，通过自振切削条件，建立了一个特定的稳定叶图。本文研究的重点是预测钻头的不稳定性轴向扭转。通过考虑对钻头的几何形状，切削参数和扭矩对推力的影响，开发出了通用的高精度钻头模型。基于模型的工件结构制作了钻头模型耦合的稳定性方法的分析。将稳定性叶和试验确定的稳定性边界进行比较以用于验证目的。论文网