(1) will solder workpiece * solders nearly annulus;
(2) makes solder workpiece and fill annulus contact, make solder annulus begins to rotate;
(3) axial pressure begins to rise, make temperature elevatory thereby, till achieve,forging temperature;
(4) solders annulus stops to rotate and inflict forgings finally force.
The 2nd phase is dry attrition phase, make solder right now package begins to contact below initial low pressure, in order to clear end panel, make reach warm-up level, reduce coefficient of friction before the 3rd phase begins. This phase needs to last for some time. Because coefficient of friction is quite right now big, reason needs biggish power to rotate solder cirque.
Pressure of the 3rd phase begins to lift, solder the attrition between package is increased. The material that apply solder becomes flimsy and appear - stream drip - condition, form namely - cremate - phenomenon. Of material - fused - make contamination keeps clear of from welding line interface. , when the short valve that installs beforehand reachs definitive place, the job of this phase ends, rotate should stop quickly as far as possible.
The 4th phase namely the last phase, pressure can rise to enough to make solder package is achieved can the degree that forge welding is together. Because do not have hot input, this phase can close to receiving undertake additional machining, refine in order to promote the farther spirit of microstructure. But crock of hydraulic pressure of have the aid of or the kind that canal of pneumatic hammer concussion carries bring to bear on forging pressure. Once this phase ends, solder the process proclaims finish, but will solder workpiece disassembles instantly.
