Research On Low-carbon Manufacturing Of Hydraulic Press And Key Technology Of Its Implement

Equipment manufacturing industry is a core component of manufacturing sector, whose technological level directly affects the competitiveness of other industries. Research on the low-carbon products manufacturing and its key technology of implementation, is an important way for enterprises to gain competitive advantages in the fierce market. Based on the research of low-carbon manufacturing mode and its implementation method of hydraulic press manufacturing enterprises, some key technologies for hydraulic press products to implement low-carbon manufacturing are proposed in this dissertation. The main work includes the following:Firstly, the low-carbon manufacturing concept and its connotation of hydraulic press manufacturing enterprises are elaborated, the significance of low-carbon manufacturing mode in hydraulic press manufacturing enterprises is discussed, and the implementation method of low-carbon manufacturing model is proposed from three levkes of design, manufacturing and lifecycle. Gross framework of low-carbon manufacturing implementation process in enterprises is built from three dimensions of technology implementation, space and time, and the low-carbon design implementation process of hydraulic press manufacture enterprise is established. Meanwhile, the carbon emission analysis implementation method of hydraulic press manufacture enterprise is proposed and the evaluation criteria of low-carbon manufacturing hydraulic press are established. Also, on the basis of MES system, the carbon emissions monitoring and controlling instrument of hydraulic press manufacture enterprise is introduced. The costs and benefits of implementation to control carbon emission are analyzed, and through case study the demonstration application of hydraulic press manufacturing enterprises of low-carbon manufacturing mode is elaborated.Secondly, the main carbon emission for hydraulic press lifecycle, especially the carbon emissions of hydraulic press manufacturing process which the current study is not thorough, is modeled and analyzed in this paper. The concept of therblig is incorporated to the analysis of carbon emissions. The therblig is divided into two categories from the association of their carbon emission with manufacturing process parameters, and their solver methods of carbon emission are respectively discussed. Through the carbon emission analysis of therblig, the most important factor affecting carbon emission in manufacturing process has been gotten, which provides the basis for manufacturing enterprises to generate strategies to reduce carbon emission. This thesis used to verify that the solving method of carbon emissions is feasible, by taking the welding procedure of a steel component of RZU-2000H-type tensile hydraulic press on beams as an example.Then, from three new perspectives, the system of hydraulic press and the energy-saving design method of key parts under the low-carbon design mode in enterprises are proposed. Analyzing the efficiency characteristics of motor and pump, the method to make optimal energy efficiency of motor-pump drive system is proposed. For multi-machine system consisting of number of hydraulic presses, by coordinating the beats between different hydraulic presses, its working hours is scheduled, its standby time of drive system is reduced and its efficiency of system is improved. Based on the abrasion constraint between movable beam and column guiding device sliding pair, and under the principle of minimum loss of gross efficiency, the optimization method of sliding fit for different guiding length and guiding device is presented.Finally, movable beam of hydraulic press is selected as the study object, and the structure topology of hydraulic press is optimized. Carbon emission in the manufacturing process of a group of movable beam is characterized, and it is associated with the parameters of movable beam. Through the topology iteration of reinforcing rib structure, the reduction of carbon emission is ensured during the period of hydraulic press manufacture and usage while the body size and the manufacturing process remains unchanged.