The method of rough machining process designing in CNC Turning

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Summary: Introduce method of process designing of two kinds of rough machining, can simplify greatly the process designing of CNC Turning works. Semifinished product of part of 1 introductive turning is good stuff or forging stock more, mental allowance is bigger and inhomogenous, because the course often wants for many times in this rough machining,take a knife. Man-hour is added on numerical control lathe, walk along a knife to must pass process designing every time, this makes the workload of process designing increases greatly, and, calculation requires when manual process designing every time coordinate of contrail taking a knife, this complex to appearance part is more troublesome. Pursue for example a shown handle part, outline is formed by a few paragraphs of circular arc, even if is to use program of linear, diagonal to divide car taking a knife to drop rough machining surplus first, the orbit computation of rough machining program is quite trival also, needless to say use circular arc program. The method of two kinds of process designing that introduces below but better land solves problem of this kind of rough machining. Benefit of law of 2 note program can simplify greatly with subprogram function rough machining program, and one stature program can be repeated be called for many times, its format is: Program of the note in subprogram main program: O#### ... ... ... M99M98 P#### L**** among them, the #### at the back of P is the **** at the back of subprogram date L it is to repeat call second plan 1 repeat for many times when calling a subprogram, the attention in the subprogram uses G91(opposite coordinate) instruction process designing, in order to make cutting contrail has opposite change every time. To the graph a shown part makes up machine program to be as follows with subprogram law: N01 G92 X16 Z90 of 0#### main program date builds workpiece coordinate to fasten N02 GOO Z73.

436Program of note of S300 M03N03 M98 P0006 L11 NO1 G91 GO1 X-6 of subprogram date of 11 N04 M02O0006.

0N02 G03 X7 of F200G91 process designing.

385Z-4.

923R8N03 G03 X2.

215Z-39.

877R60N04 G02 X2.

4Z-28.

636R40N05 G00 X2.

0N06 G00 Z73.

436N07 G00 X-9.

0M99 subprogram is returned see by the program, although have 11 times,take a knife, but the program is not complex. Graph it is OK that the 23 thick cars in using thick car to dictate CNC Turning is machined circularly dictate circularly the repetition that takes a knife for many times the movement uses a block to express, accordingly, also can simplify greatly process designing works. With fore-and-aft thick car dictates G71 is circularly exemple, the rod of a flight of stairs that can be used at semifinished product of material of rough machining club (or aperture) , the athletic contrail of cutting tool is shown 2 times like the graph, namely first statified cutting, next parallel cuts one knife at orbit, stay given fine vehicle surplus, among them solid line expresses cutting feed, dotted line shows speed or retreat quickly. Dictate the format is: ± of U) W(of ± of G71 U(d) R(e) G71 P(ns) Q(nf) U(W) F_S_T among them: Ns-nf -- the block date; U that machines orbit description -- the; W of fine vehicle surplus on X axis -- the; D of fine vehicle surplus on Z axis -- every time cutting deepness; E -- every time the part that to in an attempt to of the distance that retreat a knife shows 2 times is exemple, set semifinished product to be the good stuff of Ø120, use fore-and-aft thick car dictates G71 machines A-G circularly paragraph, the program is as follows: Speed of N01 T0100N02 G00 X120 Z10 5200 M03 comes circular start N03 G71 U1.

0R0.

5N04 G71 P05 Q11 U0.

2W0.

1Speed of N05 G00 X40 Z10 of instruction of loop of F80 rough machining comes N12 G00 X200 Z140 M02 of terminus of contrail of orbit start N06 G01 Z-30N07 X60 Z-60N08 Z-80N09 X100 Z-90N10 Z-110N11 X120 Z-130 among them N05 ～ N11 is described for orbit besides G71, still have transverse instruction of instruction of thick car loop, loop of profile modeling thick car, its usage is similar to G71, here introduces no longer. Process designing of 4 last words is numerical control machine tool uses medium important segment, the method of process designing of two kinds of rough machining of article intermediary carry on can simplify greatly process designing works. But answer to particular numerical control machine tool concrete analysis, with sufficient and reasonable use function of its process designing to simplify process designing works. CNC Milling CNC Machining