| With the comfort and elevator speed requirements of the elevator ride people raise, the demand for straightness precision of the elevator guide rail, an important part of the elevator is also more and more high. The straightness of most rails cannot reach the precision after the cutting process and therefore rail alignment is the working procedure which must be conducted before guides leave factory. Traditional Manual alignment or Semi-automatic alignment is time and power consuming, low accuracy so that it cannot meet the requirement of high-precision rails manufactured on a large scale. Moreover, there are some special characters in alignment of elevator rails such as complexity and asymmetry of rails section, larger length and elastic deformation than normal parts, which make general automatic alignment machine become useless. Given this situation, it is of great importance to develop high precision automatic alignment machine for elevator rails.In this paper, the design processes of control system for high precision automatic elevator rails alignment machine are introduced, and focus on the developments of the logistics system of this machine. At first, principals of linearity survey and alignment are illustrated and the whole design plan of this system is given with explanations of technological processes in detail. Secondly, the overall scheme of the logistics system of the alignment machine is analysis and designed. By choosing OMRON PLC as the control center, combining with servo motor, Fieldbus technology, touch screen and etc, the logistics system hardware platform is built. At last, Based on this hardware platform, controlling and monitoring of all processes is realized by using CX-One software development tool with SFC programming language, ladder diagram programming language, servo drive technology, network communication technology, HMI, etc. Moreover, other auxiliary functions like Alarm inquiries One-button operation and etc are available in this system.At last, the system structure and program design are optimized according to the system commissioning. The whole system runs smoothly and its alignment precision and production efficiency both meet requirements which make alignment become real automation and improve the production efficiency and technological competitiveness of enterprises. |
