My factory machines many aluminium for other unit, need to machine the whorl inside M6, M8, M10, M12 among them. Be in formerly aluminous on treatment whorl aperture, the reload after tap matchs bolt, the user after investment is used is mirrorred constant because of whorl " sodden tooth " and discard as useless. Below this kind of circumstance my factory consulted concerned data, also did not find a reasonable technique, much statistical data is passed in practice, plus carry out repeatedly, after using treatment bottom outlet now, reoccupy bolt studies new technology oneself, avoided thereby " sodden tooth " , increased connection strength. Whorl is attacked oneself is one kind does not have method of the treatment that cut bits, the plasticity that it relies on material is out of shape will form a tooth model. In attacking a process oneself, workpiece share data suffers the extruding that whorl tooth carries on the head, the brilliant face slippage of material edge crystal lattice, fill arrives inside the tooth chamfer of whorl, form with whorl tooth identical screw tooth model, realize whorl connection. And bottom outlet size is too small, attack oneself cannot undertake; Bottom outlet is too big, attack a tooth oneself model not full. The basis is multivariate regression analyses a principle, have the aid of undertakes analytic reaching as follows deciding at the computer inside experience of size of whorl bottom outlet is formulary: The 2)/2-0 outside the 2+d inside D bottom =[(d. In 2109t2]1/2 type: Thread inside diameter is inside D; Thread outside diameter is outside D; T is whorl pitch; D bottom is bottom outlet diameter. For example, press M8 whorl aperture to calculate: The ＝ inside D 6.
8 of the ＝ outside 647 D T ＝ 1.
25: D bottom =[(6.
6472+82)/2-0.
2109 × 1.
252]1/2=7.
3 take D bottom ＝ so 7.
3-0.
1 ought to point out, this experience formula applies to aluminium only inside the bottom outlet of whorl M6, M8, M10, M12. The whorl inside other did not do analysis and test. CNC Milling
CNC Machining