The Equivalent Resistance Gradient Analysis Method Of Constraint Metamorphic Mechanism

Metamorphic mechanism is a new field of mechanism research, which has brought mechanism new idea. It achieves practical metamorphic mechanism of metamorphic process through constraint, and requires that metamorphic joint in corresponding work configuration provides corresponding constraint to achieve configuration transforming, keeping and movement timing requirements when mechanism works. It is necessary to research the relationship between the resistance of the metamorphic joint oriented metamorphic process, and design practical metamorphic mechanism. In this paper the main contents include:At first:the author introduces the constraint form of limited metamorphic joint which mainly includes that:geometric constraint, resistance constraint and Combination constraint; according to the constrained forms, the metamorphic joint is classified into geometric limited metamorphic joint, resistance constraints metamorphic joint and combination constraints metamorphic joint; the structure of typical sliding and revolute metamorphic joint is designed, and resistance characteristics of different types of metamorphic joint is depicted. On this basis, the author introduces typical space metamorphic joint, and depicts its resistance characteristic in the paper.Second:in the paper the author analyzes metamorphic process of limited metamorphic mechanism, and uses motion cycle chart to represent the switching process of limited metamorphic joint in configuration transform, studying that how metamorphic joint is equivalent in the process of configuration transform. The author also proposes equivalent resistance gradient model and regulatory mechanism, using equivalent resistance gradient curve to depict equivalent of metamorphic joint in the process of configuration transform.At last:in this paper the composition principle of metamorphic mechanism is analyzed based on augmented Assur groups, and the analytical methods of metamorphic joint is put forward, In the process of configuration keeping augmented Assur groups are made equivalent to Assur groups, and kinetic and kinematics analysis to mechanism are made. The author uses vc++6.0to design metamorphic joint of oriented metamorphic process through calling basic rod groups program, quoting dynamic static analysis of Assur groups to propose design method of typical metamorphic joint resistance characteristics oriented metamorphic process. According to metamorphic joint design principles of equivalent resistance gradient model and oriented metamorphic process, the author tries to design material transport agencies and resistance characteristics between limited metamorphic joint, while establishing a three-dimensional model to make kinematics simulation to verify equivalent resistance gradient relationship between limited metamorphic joint and feasibility of the methods.