Numerical control lathe machines the process designing method of alterable lead whorl

  • Time:
  • Click:186
  • source:ACHER CNC Machining
Change lead whorl applies in a few industries extremely wide, but the technical difficulty with the larger presence in producing treatment, traditional treatment method has two kinds normally: It is the method that uses manual treatment on milling machine is finished, precision intensity of low, labor big, efficiency is low, and often appear reject; 2 be an auxiliary unit is added in system of center lathe feed (cam gearshift orgnaization) implementation gearshift treatment, although can assure precision, but what need technical difficulty bigger, design cost is higher, air runs be apart from increment more troublesome, and go against promotion application. And system of contemporary numerical control has powerful grand program function, the variable operation of grand function can raise the user the process capability of numerical control lathe. Via the author old experience and practice are explored, already determined the process designing method of thread machining of a kind of alterable lead, very solve conveniently change the technical difficulty of lead whorl. The article with China in the numerical control lathe of one 21T of HNc of star of numerical control century is the exemple is right process designing undertakes discussing, change to be solved in production lead thread machining provides referenced basis. Change lead whorl is the whorl that photograph adjacent pitch differs, surface of the chamfer inside its is a helicoid (like the graph 1 shows) , contrail of motion of the lathe tool when treatment is a corkscrewed yarn, spread out along circumferential direction for all the time line, photograph adjacent is circumferential the slope of straight line segment is different (like the graph 2 show) , the increment promoting role of each straight line segment is △ α , its numerical value is: ／ of S of × of P of △ of △ α =arctan{([the Pm in type of P)]} of S²+Pm(Pm + △ -- random a paragraph lead, p of Mm △ -- change lead increment, a bit more aleatoric circumgyrate circumference on blade of cutting of cutting tool of Mm S - , the type on Mm basis can reach change of △ D and lead increment, lead and thread outside diameter change the relation between. When △ " bigger when, make the same score glide to cross to make sure two-phase adjacent corkscrewed yarn asks, use circular arc to join (if pursue,place of 2 enlarge part shows) , because this is in,transfer place need to solve correction problem. Change commonly usedly if the graph is shown 3 times,lead whorl spurs metabolic law, see from inside the graph, the pitch of whorl is arranged by gradual change of arithmetical progression rule, and we use China in HNc of star of numerical control century, the system of process designing of numerical control lathe of 21T was not offerred change instruction of lead whorl cutting, right on other and relevant teaching material change of lead thread machining explain very simple also, just explained to change from the principle the treatment principle of lead whorl, maneuverability is poor. The author is experienced in machining practice, use user the variable operation of grand function, but very realize different increment conveniently change the treatment of lead whorl, rose to machine efficiency, assured to machine quality, maneuverability is strong. Grand program used NextpageM05 M30 above circular nest process designing, still need to notice the following when application: (The demand with 1) diverse basis is reasonable width of choice cutting tool. (2) because this program is to receive law treatment continuously, if treatment can adopt modification program when big lead whorl, add conditional loop statement to realize the left and right sides to slant knife law or the inclined function that take a way. (Because 3) changes the whorl of lead whorl rises horn to greaten as the accretion of lead, the horn after the horn after so the blade of left cutting blade grinds cutting tool is equal to the job adds the biggest whorl to promote role, namely: 5 ° of ～ of α =(3 ° ) + ψ . Above grand program machines test and verify through example, the product is shown 4 times like the graph. Undertake an analysis to machining a process, the result makes clear: Method of this process designing can be used at different type (worm or common thread, echelon whorl, rectangular whorl) , the treatment of the spare parts of alterable lead whorl of different increment, shorten effectively handling time, implementation raises the goal that machines efficiency. CNC Milling CNC Machining