worm gear drive distort maximum test seminars

Fatigue exam ADI worm gear drive hardness values as demonstrated in Table twelve, succeeding with the drawings defined hardness requisites: twenty-eight ~ 35HRC. Fatigue test austempered ductile iron gear microstructure of the essence part demonstrated in Figures XIII and XIV are on shellfish +10% to 20% residual austenite.

Variable speed drives of the above Table II to Table XI and pictures III to XII might be distinctly caught: first of all, the bending fatigue exam of the existing product procedure of austempered ductile iron gear enduringness could match 6DF1 diesel apply demands, and and greater than the gear purpose computation demands tangential force burden 2.9392kN, its 3.56 times; ADI gear the rest of the program test bending fatigue exam force 6DF1 diesel engine could match demands.

Second, we may check from the exam results, the state than the state ⑴ ⑵ bounds fatigue burden ⑶ the state ⑷ than state limit fatigue burden must be high, i.e. Suitable to gain the gear bore size, bring down gear after the heat sets all over measure of intervention will assist ameliorate the ADI gear limit fatigue load, which is eligible with the normal laws, but the effect is not apparent.

And posit ⑴ than the posit and ⑶ boundary fatigue load higher posit ⑵ ⑷ than the posit limit fatigue burden is more high-level, i.e. decarburized level of the root is not whittled away than the root decarburization layer worn away rather than high, and our prior approximated the inverse effects, and the answers are apparent. How come are these? I believe that after deep analytic thinking, gear bend fatigue failure procedure is a procedure of cracks and crack propagation and the crack generation gear fatigue failure caused a greater role. Austempered ductile iron gear tooth root decarburized layer is not abraded, the substrate for austempered ductile iron, with a high-pitched force and a certain level of plasticity and ruggedness, is not easily to be changed form, whilst the lower surface of the ferrite decarburized layer force, only good malleability, a plastic tensile tenseness gave in the tooth root in the procedure of bending fatigue exam, the exam load and so that the surface of the 1st level of ferrite decarburization by the tooth root fillet – by tooth root fillet – by tooth root circuit The angle – rely on the tooth root fillet – trust upon the tooth root fillet – trust upon the tooth root fillet – explore trust upon the leaking of the amount of cycles of the tooth root fillet cracks parts.