Bigger to the diameter length is longer also, put in a few curved guide screw again, use extruding tone is straight, the effect is very good. Bigger to the diameter length is longer also, put in a few curved guide screw again, use extruding tone is straight, the effect is very good. 1 job principle uses tone straight tool, below the action of outside force, surface of bottom of tooth of extruding guide screw, make plasticity of its surface generation is out of shape, to axial outspread, change condition of stress of guide screw interior, and make its become straight. Lathe of preexistence of 2 air straight means go up or on platform, measure a position of guide screw bent and way, next bent everywhere up, the face is down protruding to be contacted with metallic bolster plate, if pursue,1 is shown. Be in sunken place inside limits of 200 ～ 300mm, use what the graph shows 2 times is special flat shovel and hit bottom of guide screw tooth with hand hammer, make the metal of guide screw trail is out of shape, and achieve the goal with straight attune. In the process with whole straight key, detect curve a circumstance, hit crisscross of flat shovel extruding to undertake, until move guide screw straight. This kind of method, brief and easy travel, apply to size guide screw not only, and also apply to an axis kind the attune of semifinished product is straight, after tone is straight recover from an illness not easily also. Graph 1 graph what the 23 problem shift that should note use continuously is special R of flat shovel dimension, should be more than the half of diameter of bottom of guide screw tooth, b is less than tooth bottom wide, α is less than tooth body part; The R that contacts with workpiece is sectional, should grind a circular arc; After tone is over continuously, the tooth bottom that applied file will be squashed is in Xiu Ping. CNC MillingCNC Machining