The technology and application of water-guided laser processing are reviewed in detail in this paper.Firstly,the characteristics of water-guided laser are introduced,and the formation mechanism of water-beam fiber is analyzed.According to the different processing methods,different application fields such as punching,cutting and grooving are introduced.Finally,in view of the shortcomings of the existing technology,its development trend is forecasted.
In this paper,Dynaform finite element simulation and forming experiment are used to study the expansion performance of AZ31 magnesium alloy thin-walled tube under constant temperature condition of hot oil,and a suitable technology for hot oil expansion of magnesium alloy thin-walled tube is explored.The results show that under the condition of pipe thickness of 2 mm and pushing head force of 4 kN,the forming temperature of 200℃can obtain the formed parts with small fracture tendency,good forming state and diameter of 29.1 mm.The simulation results are in good agreement with the experimental results.
The combination of high-pressure CO2 and cutting can significantly improve the processing performance of difficult-to-machine materials,which is a new green processing technology,and its process equipment needs to be developed urgently.Based on the TRIZ theory,material-filed analysis,conflict theory,cutting,effect and other tools,combined with resource analysis,small man method and goldfish method,from the perspective of high pressure CO2 cooling lubrication process development and device design,the formation of high pressure classification utilization,self-cooling buffer tank process and device,internal cooling tool,cutting force regulation and other solutions.Overall,it improves cooling and lubrication efficiency and reduces energy consumption and costs.After comprehensive evaluation to form a solution,integration and formation of a number of patents.The research has certain reference significance for the development and implementation of CO2 cooling processing technology,as well as the innovative design and optimization of mechanical devices.
In order to study the effects of different annealing regimes on the mechanical properties and microstructure of 5754 alloy,optical microscopy,transmission electron microscopy(TEM)and tensile test are used to analyze the alloy in detail.The results show that the annealing temperature affects the mechanical properties of 5754 aluminum alloy.When the annealing temperature increases from 270℃to 300℃,the microstructure of 5754 aluminum alloy cold-rolled sheet changes from fibrous to equiaemic.5754 aluminum alloy cold-rolled sheet bending angle increases with the increase of annealing temperature.
Taking a nonferrous metal processing plant as an example,this paper analyzes the properties of different underlying surfaces of industrial plants,and adopts a variety of low impact development facilities(LID)to compile a sponge city special planning and design that conforms to the actual conditions of industrial plants.This can not only meet the requirements of industrial production and use,but also realize the cross-peak discharge of rainwater,reduce the drainage pressure of the rainwater pipe network,and rationallly use rainwater resources to save water for industrial enterprises,which has a reference significance for the special planning and design of sponge cities in similar industrial plants.
