Development of Simulator for Surgical Robot with Linear Motion Unit and Trocar Restriction

In the present work, investigations by high frequency resonance technique for diagnosis of defect frequencies of linear motion unit are reported. Raw vibration signature of the moving parts at different speeds of operation has been demodulated. Envelope detected spectrum is analyzed to evaluate various defect frequencies and their energy levels. Experimentally evaluated frequencies are compared with theoretically determined defect frequencies. These frequency values and their energy levels are used to monitor intrinsic condition of linear motion unit as well as to establish severity of existing/developed defects on the LM guide and inside the LM block. Relative comparisons of linear motion units of the same type are made at various operating speeds under identical conditions of operation on the basis of identified defect frequencies and severity of defects.

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Design Research of Linear Motion Unit Based on Magnetic Suspension Principle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.945-949.347 ◽

2014 ◽

Vol 945-949 ◽

pp. 347-350

Author(s):

Yu Xin Zhao ◽

Min De Shen ◽

Xue Hui Shen

Keyword(s):

Permanent Magnet ◽

Design Research ◽

Magnetic Suspension ◽

Linear Motion ◽

Broad Application ◽

Stable Suspension ◽

Halbach Array ◽

New Type ◽

Motion Unit ◽

Application Prospects

In order to minimize the friction when the linear motion unit in the movement, the new type unit based on permanent magnet was designed. The Halbach Array magnet structure was adopted in the unit. It can realize the stable suspension with the combination of gravitation and repulsion. The new type units have good performance and broad application prospects.

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The Design of a Five-Axis Machine for Water Jet Incremental Sheet Metal Forming

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.395-396.949 ◽

2013 ◽

Vol 395-396 ◽

pp. 949-956

Author(s):

Hai Long Lu ◽

Kai He ◽

Jiu Hua Li ◽

Shu Guo Wei ◽

Ru Xu Du

Keyword(s):

Sheet Metal ◽

Sheet Metal Forming ◽

Metal Forming ◽

Degrees Of Freedom ◽

Water Jet ◽

Linear Motion ◽

Expansion Joints ◽

Incremental Sheet Metal Forming ◽

Motion Unit ◽

Five Axis

Water jet incremental sheet metal forming is the leading research topic in sheet metal forming industry, recently. In this work, a five-axis machine for water jet incremental sheet metal forming is designed and built, which is made up of four parts, namely linear motion unit, nozzle tilt and rotation unit, fixture and seal chamber. The nozzle tilt and rotation unit has two rotation degrees of freedom and the linear motion unit has three translational degrees of freedom. Then, two types of nozzles including L type nozzle and upright nozzle are designed and built. Finally, two different kinds of fixture are designed and built for common sheet metal forming and bellows expansion joints forming, respectively.

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