Kinematic and dynamic synthesis of a parallel kinematic high speed drilling machine

2004 ◽  
Vol 44 (12-13) ◽  
pp. 1381-1389 ◽  
Author(s):  
Reuven Katz ◽  
Zhe Li
Keyword(s):  
High Speed ◽  
Drilling Machine ◽  
Dynamic Synthesis ◽  
High Speed Drilling ◽  
Parallel Kinematic

Finite Element Analysis of a Gantry Type High-Speed Drilling Machine

2014 ◽  
Vol 1004-1005 ◽  
pp. 1353-1358
Author(s):  
Gao Zhi Liu ◽  
Shu Min Qiu ◽  
Sheng Jun Li
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Maximum Amplitude ◽  
Spindle Speed ◽  
Torsional Stiffness ◽  
Drilling Machine ◽  
3D Design ◽  
Element Analysis ◽  
Finite Element Software ◽  
High Speed Drilling

The assembly of a gantry type high-speed drilling machine was designed with 3D design software. The analysis of the static and dynamic of the gantry was performed by using a finite element software. The results show that, the existing model has perfectible dynamic and static performance, the safety factor of strength reaches 10.5, static stiffness is 186.6KN/mm, and can meet the requirements. The maximum amplitude of dynamic response of the gantry is reached at the third order modal when the rated spindle speed is 3400 RPM(56.7Hz). In order to avoid the resonance and to ensure the machine with longer service life and high manufacture precision, the spindle speed should be adjusted under 3000RPM. The analysis shows that the design of the existed model is reasonable. However during the further design and optimization, the designers can also reinforce the stiffness of the gantry by reducing the weight of the spindle boxes and increasing the torsional stiffness of the uprights.

Module Partition and Application for Printed Circuit Board High Speed Drilling Machine

2011 ◽  
Vol 188 ◽  
pp. 104-109 ◽  
Author(s):  
Hong Qun Tang ◽  
Cheng Yong Wang ◽  
Bing Wang ◽  
F. Su ◽  
Ping Ma ◽  
...  
Keyword(s):  
High Speed ◽  
Printed Circuit Board ◽  
Rapid Change ◽  
Performance Testing ◽  
Circuit Board ◽  
Drilling Machine ◽  
Drilling Force ◽  
Printed Circuit ◽  
High Speed Drilling ◽  
Module Partition

The target of this paper is to design a high speed drilling machine suitable for printed circuit board with micro-hole of 0.1 mm diameter, which has drilling force measuring function and rapid change spindle function. Therefore, in this paper, the main principles of module partition for drilling machine were analyzed. Module partition was conducted for high speed drilling machine of Printed Circuit Board (PCB), as well as using modular components combine PCB high speed drilling machine. Then, performance testing and simulation of dynamic modeling were carried out on the modular PCB high speed drilling machine. The results show that the modular PCB high speed drilling machine has good performance, enough stiffness, better stability and meeting the design requirements. The modular partition laid the foundation for further study on the module creation and reconfiguration of PCB drilling machine.

Droplet and bone dust contamination from high‐speed drilling during mastoidectomy

2021 ◽  
Vol 46 (3) ◽  
pp. 614-618
Author(s):  
Anne L. Markey ◽  
Samuel C. Leong ◽  
Casey Vaughan
Keyword(s):  
High Speed ◽  
High Speed Drilling

Dynamic characteristics of a drill in the drilling process

2003 ◽  
Vol 217 (2) ◽  
pp. 161-167 ◽  
Author(s):  
B W Huang
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Thrust Force ◽  
Time Dependent ◽  
Drilling Process ◽  
Improve Quality ◽  
Vibration Model ◽  
High Speed Drilling ◽  
Spinning Speed ◽  
Twisted Beam

The dynamic characteristics of high-speed drilling were investigated in this study. To improve quality and produce a higher production rate, the dynamic characteristics of the drilling process need to be studied. A pre-twisted beam is used to simulate the drill. The moving Winkler-type elastic foundation is used to approximate the drilling process. A time-dependent vibration model for drilling is presented. The spinning speed, pre-twisted angle and thrust force effects of the drill are considered. The numerical analysis indicates that the natural frequency is suddenly reduced as the drill moves into a workpiece.

Wear mechanisms of micro-drills during dry high speed drilling of PCB

2012 ◽  
Vol 212 (10) ◽  
pp. 1989-1997 ◽  
Author(s):  
L.J. Zheng ◽  
C.Y. Wang ◽  
L.Y. Fu ◽  
L.P. Yang ◽  
Y.P. Qu ◽  
...  
Keyword(s):  
Wear Mechanisms ◽  
High Speed ◽  
High Speed Drilling

scholarly journals Modal Kinematic Analysis of a Parallel Kinematic Robot with Low-Stiffness Transmissions

Robotics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 132
Author(s):  
Paolo Righettini ◽  
Roberto Strada ◽  
Filippo Cortinovis
Keyword(s):  
High Speed ◽  
Parallel Robots ◽  
Maximum Speed ◽  
Kinematic Structure ◽  
End Effector ◽  
New Approach ◽  
Working Space ◽  
Modes Of Vibration ◽  
Parallel Kinematic ◽  
Actuated Joints

Several industrial robotic applications that require high speed or high stiffness-to-inertia ratios use parallel kinematic robots. In the cases where the critical point of the application is the speed, the compliance of the main mechanical transmissions placed between the actuators and the parallel kinematic structure can be significantly higher than that of the parallel kinematic structure itself. This paper deals with this kind of system, where the overall performance depends on the maximum speed and on the dynamic behavior. Our research proposes a new approach for the investigation of the modes of vibration of the end-effector placed on the robot structure for a system where the transmission’s compliance is not negligible in relation to the flexibility of the parallel kinematic structure. The approach considers the kinematic and dynamic coupling due to the parallel kinematic structure, the system’s mass distribution and the transmission’s stiffness. In the literature, several papers deal with the dynamic vibration analysis of parallel robots. Some of these also consider the transmissions between the motors and the actuated joints. However, these works mainly deal with the modal analysis of the robot’s mechanical structure or the displacement analysis of the transmission’s effects on the positioning error of the end-effector. The discussion of the proposed approach takes into consideration a linear delta robot. The results show that the system’s natural frequencies and the directions of the end-effector’s modal displacements strongly depend on its position in the working space.

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