Numerical control lathe is alterable the cutting of lead whorl

One, introductive
Change surface of the chamfer inside lead guide screw is a helicoid, if graph 1a place is shown, a bit more aleatoric contrail on blade of cutting of lathe tool of the figuration when treatment is a corkscrewed yarn, spread out along circumferential direction for all the time line, if pursue,2 are shown. Graph 2 in the abscissa is round circumference, ordinate is lead, because be to change lead corkscrewed yarn, photograph adjacent is circumferential the slope of straight line segment is different, the increment promoting role of each straight line segment is △ α , its numerical value is:

T)]} (1 of △ of T.S)/[S2 Tm(Tm of △ α =arctg{(△ )

Random of ─ of the Tm in type a paragraph of lead (Mm) ;

A bit more aleatoric circumgyrate circumference on blade of cutting of S ─ cutting tool (Mm) ;

△ T ─ changes lead increment (Mm) .

According to type (1) can reach change of △ α and lead increment, lead and guide screw external diameter change the relation between, when △ when α is bigger, transfer to make sure space of two-phase adjacent helix is flowing, accept circular arc or linear connection, if pursue,2 are shown. Accordingly, whole change lead guide screw is comprised by two cento line. Change to promoting role greatly lead guide screw, still must be in transfer place amend.

Graph 1 change lead guide screw

Graph the corkscrewed yarn after 2 circumferential way develop

Rise ceaselessly as what ask to rigid structure function, also raised very tall requirement to the structure of a few spare partses. Change lead guide screw is an among them delegate, change the application of lead whorl is very wide, if beverage canister installs machine, in process of beverage fill outfit, need times container be apart from smooth ground to carry the project that pack surely, the device that fulfils this one requirement is called be apart from space surely time supply unit, can come true so ordinal be apart from the purpose for sending vessel surely, its advocate transmission share goes namely lead helix lever. Change besides lead whorl transmits machinery, plastic extruding machine, feed machinery, shipping to go up in aviation change on centrifugal pump of lead airscrew, high speed change lead inducer, change suspension changes direction to go up before plant of lead airscrew power and car change the respect such as lead bedspring vibrating absorber has. But, how accurate treatment goes out change lead guide screw fails to be solved well all the time however. Long-term since it is the method that uses manual treatment on milling machine is finished, precision is low, labor strength is great, and often appear reject. With method of numerical control turning treatment changes lead whorl, improved efficiency and treatment quality.
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