Estimation of workpiece clamping force of CNC lathe

Estimation of workpiece clamping force of CNC lathe

CNC lathe machine manufacturer China shares that the size of the clamping force on the workpiece installation of reliability, workpiece and fixture CNC lathe deformation, the complexity of the clamping mechanism is very important. In the process of machining, the workpiece is affected by cutting force, centrifugal force, inertia force and gravity of the workpiece.

Generally, the cutting force (moment) plays a decisive role in the processing of small and medium sized workpieces in a CNC lathe factory. When machining heavy, large workpiece, must consider the role of gravity workpiece. The effect of centrifugal force or inertial force on the clamping action can not be neglected when the workpiece is processed under the condition of high-speed movement.

In addition, cutting force itself is a dynamic load, in the process of machining is also changing. The clamping force is also related to the rigidity of the process system and the transmission efficiency of the clamping mechanism.

Therefore, the calculation of clamping force is a very complex problem, generally can only make rough estimates. For simplicity, in the low speed processing to determine the clamping force, can only consider cutting force (torque) influence on clamping, and assumes that the numerical control lathe process system is rigid, the cutting process is stable, according to the process of the instantaneous state of clamping the worst, according to the principle of static equilibrium and the size of the clamping force, and then multiplied by the factor of safety as the actual required clamping force CNC lathe factory, namely Fj type = kF Fj - in the actual required clamping force; F -- clamping force calculated according to static equilibrium under certain conditions; K -- safety factor. Considering the change of cutting force and process system deformation and other factors, A 2 1 is generally chosen. 5 to 3.

In practical application, not all CNC lathes need to calculate the clamping force under the condition of CNC lathes. Manual clamping mechanism generally determines the clamping force according to experience or analogy method. If it is necessary to calculate the clamping force accurately, the above method can be used to calculate the clamping force.

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