Mechanical lock up the existence as a result of attrition force and problem of driving force direction oneself, no matter how driving force increases,also cannot make the phenomenon of mechanical movement calls machine sometimes from the lock. The athletic way that machinery must avoid to need in place when research designs machine from the meaning that locks up a phenomenon happens from the lock; A few machinery need to make sure its are had when the design lock up character oneself. Happen from the condition of the lock: Mobile deputy from the lock graphic representation moves deputy, the significant component of force that driving force P makes slide block produces motion is Pt of horizontal component of force, namely the obstruction of the biggest attrition that Pn of Pt=Psinb=Pntgb perpendicular component of force makes slide block suffers 1 times is become for Fmax=Pntgf when B ≤ F, have Pt ≤ Fmax, namely no matter how driving force P increases, the force of the biggest attrition that the significant component of force of driving force always is less than place of itself of driving force P to may be caused, consequently slide block 1 always won't produce motion, happened to lock up a phenomenon oneself namely. Mobile deputy lock up a condition oneself: Driving force action happens from the lock surely inside angle of friction. Rotational deputy go up in journal from lock action outside load is P, it is when the action line of force P in attrition circle when, namely A< ρ , because of driving moment M=Pa=Qa, the Q of ρ of ρ = of Mf=R21 of moment of force of the biggest attrition that is less than itself to be able to be caused from beginning to end. So force P random increases, also cannot drive journal roll. I.e. happened to lock up a phenomenon oneself. Rotational deputy lock up a condition oneself: Driving force action happens from the lock surely inside attrition circle. Lock up a condition oneself certainly according to efficiency: When machinery happening is locked up oneself, it is the work that can make because of driving force always is less than what cause possibly by its the work that place of obstruction of the biggest attrition needs. Lock up oneself when machinery happening namely when, its machinery efficiency is less than constant or be equal to 0, namely H ≤ 0. When η =0 machinery is in critical lock up condition oneself; Be like H≶0, criterion its absolute value is greater, make clear from Suo Yue reliable. The computational formula that can adopt mechanical efficiency so will judge machinery to whether happen from the condition that lock and analysis lock up oneself. But must notice: Right now η already was done not have normally the meaning of efficiency. When deciding according to what seeking impedance power from the lock the condition is in mechanical from the lock happening, machinery already cannot move, the manufacturing obstruction Q that gets at this moment will is equal to or be less than 0, namely Q ≤ 0. Right now, only impedance force turns into reversely mechanical ability moves after driving force. Then but when driving force random increases, q ≤ 0 whether to hold water decide whether be locked up oneself and lock up a condition oneself certainly. Alleged machinery has conclusion to lock up a gender oneself, when the drive master piece that just says to suffer when it is used at its somewhere or pressing some direction action, lock up oneself, and can moving below another circumstances however. Decide whether can be the orgnaization locked up oneself and happen from the lock below what condition, but according to particular case, inspect convenient use analytic driving force whether action at angle of friction in. CNC MillingCNC Machining