Study on Numerical Comparison Method of Four-bar Straight-line Guidance Mechanism

Hong-Ying Yu, Yan-Wei Zhao, Zhi-Xing Wang

(School of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, China)



Abstract:

In order to solve four-bar straight-line guidance mechanism synthesis problem for the arbitrarily given straight-line’s “angle requirement” and “point-position requirement”, a numerical comparison synthesis method for single and double straight-line guidance mechanism is presented, which is convenient to realize by computer program. The basic idea of this method is: to select a four-bar linkage whose relative bar length of crank is 1 as a basic four-bar linkage. Then the other three relative bars’ length is changed, and a lot of basic four-bar linkage can be obtained. There are many single and double ball-points of each basic four-bar linkage. With the motion of a basic four-bar linkage, there is straight-line segment of each Ball-point’s path. The data of these basic four-bar linkages is saved to a database. When designing a four-bar straight-line guidance mechanism, the design data is compared with the data in database and a satisfactory four-bar linkage can be obtained. The method effectively solves the straight-line guidance mechanism synthesis problem.

Key words:  numerical method  straight-line guidance mechanism  mechanism synthesis

DOI：10.11916/j.issn.1005-9113.2013.04.011

Clc Number:TH112.1

Fund: