Research On Production Technology Of U-Shaped Bending Part Of Center Pivot Of Aerial Work Truck

In recent years,the stability and safety of aerial working vehicle are very important as the climbing working tool,and the assembly quality of the center pivot of its components plays a key role.Among them,the bending process of high strength medium thickness plate U-shaped bending parts is one of the important reasons to restrict the assembly quality.Due to the deformation of high strength medium and thick plate after bending into U shape,the spring back trend of thick plate is difficult to predict,which makes it difficult to meet the design requirements and ensure the subsequent assembly quality of the bending parts in the opening and height directions.In order to solve the technical problem,this paper firstly analyzes the bending process of the center pivot U-shaped bending part,and designs a forming stamping bending technology according to the analysis results,which can better improve the spring back problem of bending.Secondly,the three-dimensional laser scanning technology was used to scan and sample the U-shaped bending parts,and the overall deformation of the plate after bending and the size error of each point on the opening boundary were statistically analyzed.In order to solve the correction problem of spring back after bending,the mechanical loading analysis method was used to obtain the stress and strain parameters of the corresponding loading area of the correction device.Finally,theoretical basis,to design a set of electric displacement deformation correcting device,will be adjusted to the level state u-shaped bending parts,in the process of testing calibration open fork and the size of the height direction,through the three coordinate feed control,implementation of deformation state correction,improve the efficiency of correction,solve the bending spring back of the u-shaped bend and correction.An automatic scanning device for U-shaped bending parts is designed to replace manual scanning and improve the scanning efficiency.Finally,the research results of this paper provide a technical means and method to ensure that the opening and height dimensions of the bending parts meet the design requirements and ensure the assembly quality,which has certain practical guiding value.