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经典的弹性碰撞理论认为,碰撞过程中除了塑性变形吸收的能量外,其余能量都将以剩余动能的形式表现为碰撞物体的回跳。按照这种理论建立的有砧座锤打击模型如图1所示,即把锤头(包括上模)和砧座(包括下模及工件)看成两个对心碰撞的自由体,设m为锤头质量,M为砧座质量,v_1、v_2分别为锤头和砧座打击前的速度,v_1~′、v_2~′分别为锤头和砧座打击结束时的速度,ε为恢复系数,则此系统开始打击时的能量
The classical elastic collision theory holds that all the energy except the energy absorbed by plastic deformation during the collision will be expressed as the bounce of the collision object in the form of residual kinetic energy. According to this theory established anvil hammer blow model shown in Figure 1, that is, the hammer (including the upper mold) and the anvil (including the lower mold and the workpiece) as two collision free body, set m Is the mass of the hammerhead, M is the mass of the anvil, v_1 and v_2 are the speeds of hammerhead and anvil striking respectively, v_1 ~ v_2 ~ ’are the speed at the end of striking of hammerhead and anvil respectively, ε is the recovery coefficient , Then the system begins to hit the energy