| People realize the importance of environmental protection with national industrialization, embodying in construction industry. Not only can expended metal lath effectively eliminates local stress, preventing the wall cracking, but also greatly improves the work efficiency, saving resources. Expended metal lath has not been widely applied in domestic construction industry so far, making its market prospect braod. During its manufacturing process, rolling-cut is so critical that it has huge impact on shear and tension processes. But enterprises will encounter problems during production the lath, such as: high cost, short service life, no-ideal manufacturing quality, and so on.This thesis takes the metal lath of DD0.5×4×690×2440 as the research object, which is the most commonly used in practical.Rolling-cut process is studied by theoretical analysis and numerical simulation, simulating the cutter structure parameters and cutting parameters, based on sheet metal shear theory.The rolling-cut process is established in ANSYS/LS-DYNA, making dynamic simulation, getting the strain, stress of the steel plate during the shearing process and knowing how the cutter deforms, based on the cutter structure parameters and cutting parameters. Then the reason of the vertical direction tearing is obtained with analyzing the simulation results, optimizing the cutter structure. And the data in the simulation tool axis deform process is analysed with the simulation data. Finally, by changing cutter structure parameters and shearing parameters, obtain that what impact different parameters have on shearing quality, providing theoretical basis for the selection of cutting process parameters and the design of tool structure. |
