Automatic Assembly System Design Of Steel Structure Complex Joint

At present-day, there are mounting of architecture and facilities with new steel structure.Along with the improvement of aesthetics, the application of new design philosophy andmethod as well as the update of computer hardware and software make the shapes of steelstructure and joints more and more complex, which results in that the higher requirement ofassembly accuracy and the structural strength. The traditional manufacture and assembly ofjoints cannot adapt to these requirements. Therefore, in practical perspective, it is necessary toexplore new mode of production of joints by employing new modern design philosophy andmethods until develops a new joints automatic assembly system.This paper focuses on the steel structure joints in a practical project and attempts toimprove the assembly accuracy, to save resource and to reduce energy consumption anddevelops an automatic assembly system of steel structure complex joints.First, this paper reviews the research status of steel structure joints and technical status ofassembly methods at home and abroad. Taking a practical project as an example, this paperanalyzes the characteristics of the joints’ configuration, combines it with requirements in thepractical project, identifies the general plan and technical index for the automatic assemblysystem of steel structure complex joints and presents designing the system with moderndesign methods including mechanical structure design, control algorithm, hardware selectionand software design of control system.Second, from the perspective of structure and function of the automatic assembly system,this paper establishes the mathematical model of algorithm, then transfers it into mathematicalformula which is used in matric manipulation according to the characteristics of eachmovement mechanism’s degree of freedom and the relationship of coordinate transformation,finally programs, calculates and verifies it. In the station position of joints algorithm, theestablishment of the mathematical model is based on the mechanical parameters and thecharacteristic data of joints model in the practical movement mechanism. According to the useconditions of the assembly system, this paper presents the general plan of the control systemand identifies the selection and design of the PLC, text display, servo drivers, servo motor andelectric control cabinet and so forth. During the process of the software development, thispaper analyzes the functional procedure and finishes the specific modular analysis and designof the pulse register assignment of PLC, origin point setup, motor start-up in operating position, motor suspension, motor movement from the operating position to the original point,the programming of text display and thus completes the development of softwareFinally, this paper elaborates the debugging between software and hardware of theautomatic assembly model machine and makes testing program of assembly accuracy for thesystem; then this paper makes experiments on the accuracy measurement for the assemblysystem. Through comparing the trial assembly of joints model of the automatic assemblymachine and that of multi-group related parameters in the three dimension software andanalyzing the testing data, it shows that the results are good. Besides, the author analyzes theprobability of the deviation during the assembly process and looks forward to the futureresearch. The research results in this paper will improve the development of the automaticassembly technique for the complex joints and be beneficial to enhance the competitiveness ofthe steel structure company.