Design And Research On New Vibration Slag Removal Equipment For Concrete Metal Formwork

Aluminum alloy concrete formwork,as a kind of environmental protection,high efficiency and reusable formwork,is widely used in construction and engineering construction.Before reuse,aluminum alloy concrete formwork needs to remove the concrete residue adhering to its surface in the last use.The common slag removal processes of aluminum alloy concrete formwork include manual slag removal,highpressure water flushing,shot peening and so on;High pressure water cleaning wastes a lot of water resources and does not clean thoroughly;The technology content of shot peening slag cleaning equipment is high,and the one-time investment of process requirement is high.The traditional slag removal method of aluminum alloy concrete formwork has single function,low efficiency and incomplete cleaning.Rapid,efficient and clean slag removal method has become an urgent problem for enterprises.Based on the theory of mechanical vibration,this paper studies the peeling mechanism of the metal formwork surface adhesion residue under vibration state.According to the theoretical analysis results,a mechanical vibration type slag removal equipment is designed.The equipment uses external excitation to impact the metal formwork,which produces vibration,which makes the attached concrete separate,and can realize the quick,efficient and clean slag removal function.The key parts of the equipment are designed and analyzed,which provides technical support for the development of such equipment.The main research work of this paper is as follows:(1)This paper analyzes the technology and equipment of aluminum alloy concrete formwork slag removal at home and abroad,and puts forward the mechanical vibration slag removal process scheme.The modal analysis of aluminum alloy concrete formwork and simulated concrete residue is carried out by using ANSYS Workbench finite element software.The relative deformation of the two is compared under the same low-order natural frequency.The rationality of vibration slag removal is verified,which provides theoretical basis and technical support for vibration slag removal equipment.(2)This paper analyzes and determines the placement mode of aluminum alloy concrete formwork and the selection of vibration mode of excitation system,compares the structural design scheme of vibration slag removal equipment,discusses the basic structure form and scheme layout of vibration slag removal equipment,and completes the overall scheme design of vibration slag removal equipment through modeling and assembly of vibration slag removal equipment by SolidWorks software.(3)The three-dimensional model of the excitation device is designed and its physical model and mathematical model are established by SolidWorks software.The structural design of the main parts such as crankshaft,connecting rod,spring,vibration frame and vibration fork arm is carried out.The main design parameters and key technical parameters of the excitation equipment are determined,and the main parts of the excitation system meet the system requirements.(4)The structure design of the frame of vibration slag removal equipment is carried out.The frame structure is modeled by SolidWorks software.The stress,strain and deformation of the frame crossbar when being impacted by aluminum alloy concrete formwork are analyzed.The strength and rigidity of the frame meet the structural design requirements.The natural frequency and mode of the frame under the constraint conditions are analyzed by modal analysis method,It is verified that the lower order natural frequency of the frame is higher than the external excitation frequency of the excitation system,which effectively ensures the stability of the vibration slag removal equipment.