Vericut emulates medium application in treatment of mill of essence of four-axle of little tine rotor

The characteristic of rotor in oil in quantity plan, tolerance plan or orgnaization of plastic and mechanical feed, use gear of a kind of helix extensively. The characteristic of this gear is modulus bigger, and belong to nonstandard modulus. If use gear hob treatment, to reduce a root to cut, must use specific technique Caikesheng yields eligible product. On the other hand, its tine number is less (often be 3 tine or 4 tine) , milling method production is used when reason finish machining, its efficiency and precision all can be accepted. For example, graph 2 it is one rotor gear, it circles Z to the axis makes helix move and be formed by section plane of 4 tine involute. This section plane supports to round, involute and cycloid join and be become by tine, its appearance is shown 2 times like the graph. Gear parameter rank is expressed 1, ra is tooth flank surface roughness 1.

6. Express parameter of 1 rotor gear to pursue 2 rotor gear 2.

The method of NC process designing of rotor by the formation of rotor the process is knowable, this workpiece should use four-axle treatment: Negative direction of axis of workpiece edge Z makes divide evenly fast feed, circle Z axis to make divide evenly at the same time fast whirligig, such cutting tool give a corkscrewed yarn in dimensional cutting; Every complete journey of a cutting, workpiece is fast restoration, next cutting tool makes involute interpolation move on XOy plane (linkage of X, Y) , have the 2nd stroke again. Carry out this process repeatedly, end till milling of whole tooth flank. This still is to exhibit law treatment essentially. The foregone condition when rotor NC process designing is: (1) contour line of rotor end panel. The person that the architect is this outline disperse on 1000 to count foothold to give NC process designing normally. (2) the parameter such as the tine number of rotor, modulus, pressure angle, helix angle, lead. The specific means of process designing is as follows: (1) end panel outline the dot drafts synthesis to be smooth curve, if pursue,3a place is shown. Graph 3 rotor data processing and build a model (2) the three-dimensional model that builds rotor, if pursue,3b place is shown. The method that build a model has a lot of, can build on the platform such as Pro/ENGINEER, AlphaCAM. When building a model, contour line assumes office a bit P(xi, the helix that Yi) is in guides the equation that use a line is (coordinate department refers to a graph 2) : In type, q is rotor length, h is lead, choose arrowy path for P, , t is ginseng variable, ≤ of 0 ≤ T 1. (3) interrupt end panel outline on average by arc length for a certain number of child paragraph (3d of graph 3c, graph pursues for local enlarge) , child paragraph amount decides according to the requirement of exterior surface roughness. (4) the coordinate that begs an every stature Duan Duan to nod and the law vector N that are in helix curved surface at this o'clock. Radius of knife of the head that set a ball is R, by Nr of formulary P=P0 ＋ computation gets knife digit is occupied, weave accordingly NC program (process designing of the heart that press a knife) . 3, undertake emulation to milling process with Vericut 1.

Build semifinished product model to undertake cutting emulate to finish machining, theoretic the semifinished product before should building semi-manufactured goods model to serve as finish machining. But, because the end panel tooth profile of rotor is curve of one only cost, reason is OK rough machining before cylindrical the semifinished product before semifinished product serves as finish machining, if pursue,4 are shown. Such, in emulate the system may hint every knife is cut pass greatly big, but do not affect orbit imitate and interference desired result. Graph 4 semifinished product are defined 2.

The machine tool defines the content that the machine tool defines to include * .

Mch file (definition machine tool, clamping apparatus) with * .

Usr (CNC is defined) two respects. Because the structure of the machine tool is Protean, CNC type is various, use normally so be based on the machine tool that embeds inside Vericut to define a file to combine particular machine tool structure and regulation of CNC process designing to define. Main content includes: (1) coordinate of affirmatory machine tool is; (2) coordinate of affirmatory process designing is; (3) motion of definition movement rod concerns; (4) G code and M code definition. Origin of rotor process designing is located in center of right end panel, so machine tool origin and process designing origin not coincide. With KAFO, machining center of some four-axle vertical is exemple, its CNC is FANUC 0M, machine tool origin is located in the node of Z axis and working mesa. These all can be in " Component Tree " in undertake installing.

3.

When rotor is machined, cutting tool definition uses ball head milling cutter. Should mix according to the knife date in NC program the radius of ball head knife of make choice of defines cutting tool, if pursue,6 are shown. A) pursues 6 cutting tool are defined 4.

On the foundation that machines a process to emulate good in the definition semifinished product, machine tool and cutting tool, had installed emulation animation to show parameter, can undertake cutting process is emulated. If need, still can wait for auxiliary content to have a definition to clamping apparatus, material, window. Graph 7a is milling of Zun Xuan rotor emulates a medium setting. Cutting process and cutting result all show in graphical window, interference can pass log file and clew travel to examine. Graph 7b is the rotor finished product that gives by machine tool treatment, it and the result of emulation treatment agree completely. A)b) pursues the rotor of 7 emulation treatment and the rotor that machine actually 4, last word Vericut is collect a variety of functions emulate a system at the cutting of an organic whole. The article elaborated the implementation method that is based on Vericut to age the NC milling of rotor is emulated less. Use this platform to be able to realize logarithm to dominate the desired result of code with the means with visual image, have important sense to assuring the validity of numerical control program, can will cut too eliminate with the insecure element such as interference before the machine tool is machined. CNC Milling