The milling that talks about taper pipe thread again and relevant of grand program write

Cutting tool choice is in to the theory of milling before ever introduced for many times on the magazine, do not elaborate more, to the choice of cutting tool, my company is the whorl milling cutter of used HORN, referenced graph 1. Cutting tool model is M313.

0016.

02B, for odd tine treatment, a razor blade is 3 tine, this cutting tool can be machined inside groove, can machine again inside whorl, and come from use experience look, change after bit, do not affect precision. In the graph, w is cutting tool width, l2 is what can machine aperture the biggest deepness, DS is cutting tool diameter, APmax is quantity of penetration of a cutting tool of the biggest effective back, "B " " E " for cutting tool model. 2.

The treatment of whorl bottom outlet has taper as a result of aperture 1: 16, and the dimension of aperture also affects the quality of whorl directly, I pass UG(3D software) mill gives this opening. 3.

The treatment analysis of whorl because taper of this whorl existence, so net circular arc movement will not satisfy treatment requirement, adopt the way that approachs point-blank to solve a problem now. Main train of thought is, the contrail according to taper pipe thread can see, as the rise of whorl, the radius of whorl also as increase, what reason can regard XY plane to go up is circumferential and the linear synchronism of Z direction moves, here can introduce angle idea, we can be whole and circumferential cent 360º , as the addition of angle, answering XYZ also increases canopy, again the encircles number to be able to finish whole taper pipe thread treatment of together with whorl. That is to say every change 1º , mobile a straight line segment, this precision is sufficient can assure the quality of whorl, of course if be necessary can 0.

5º differentiates circumferential, smaller even. Taper pipe thread jumps tooth tap 4.

The grand program of treatment introduces as follows (by FANUC system) referenced graph 2, write thread machining program. Manual of process designing of ％ 9000#20=ABS[#20] corresponding FANUC, t[#20] takes absolute value, absolute value is taken for #18=ABS[#18] R[#18] of cutting tool diameter in this program, for safe distance in this program #105=#4003 numerates current mode information (G90/G91)#106=#4109 numerates current mode information (F feed is led) #110=#5003 numerates coordinate of current Z axis is worth IF[#17EQ1.

] a type of local school in ancient times of process of GOTO100 judgement Q[#17]=1 jumps to N100, to machine ZG1-1/2 " IF[#17EQ2.

] a type of local school in ancient times of process of GOTO200 judgement Q[#17]=2 jumps to N200, to machine ZG2 " GOTO875N100#144=9.

Set milling encircles several #145=25.

4*0.

06957 teeth tall #146=25.

4/11.

5 pitch #147=44.

#148=7 of 52 orifice diameter.

Deepness of 83*#146 whorl requirement, 7.

The 83 the smallest teeth that are a requirement count GOTO600N200#144=9.

#145=25.

4*0.

06957#146=25.

4/11.

5#147=56.

558#148=8.

Whether 01*#146GOTO600N600IF[#24EQ#0]GOTO601 judgement X[#24] is 0 (the central X coordinate that is whorl aperture namely) #24=0.

Whether N601IF[#25EQ#0]GOTO602 judgement Y[#25] is 0 (the central Y coordinate that is whorl aperture namely) #25=0.

Whether N602IF[#1EQ#0]GOTO603 judgement A[#1] is 0 (it is referenced and planar set namely) #1=0. Local coordinate is N603G0G90G40G52X[#24]Y[#25] set, move coordinate department compulsively to wait for GOX0 of center of treatment whorl aperture.

Y0.

Move to be in #26=#1-#148#118=#148*0 to aperture center.

0625#119=[#147-#118]/2#120=#146/32.

/ 360. #116=#1+#18GOZ[#116] moves to be in GIZ[#26]F[3*#106] to move to safe distance to G1G41X[#119+#145]/2 of ministry of whorl hole bottom.

] Y[[#119+#145]/2.

] F[#106] takes 45º oblique line, introduce left compensation G3X0.

Y[#119+#145]R[[#119+#145]/2.

] F[#106] circular arc cuts #121=1#122=#119+#145+#120*#121WHILE[#121LE[#144*360.

] ] whether is the frequency with DO1 mobile judgement achieved (milling circle counts *360)G1X[-#122*SIN[#121]]Y[#122*COS[#121]]Z#26+#146*#121/360.

] linear cutting (notice X, y, z all moves) #121=#121+1.

#122=#119+#145+#120*#121END1GOG40X0.

Y0. Take cut a knife to fill, move aperture center G52X0.

Y0 is taken cut local coordinate to fasten safety of set GOZ[#116] fall back on to be apart from the knife since place GOZ[#110] fall back on to be in G[#105]F[#106] to return original mode information GOTO999 N875#3000=190(HAVE NOT DEFINED) N999 #33=49 to become dangerous clear empty WHILE[#33NE0]DO1 #[99+#33]=#0 #33=#33-1 END1 M99 of grand program call G65P9000X0.

Y0.

A0.

R3.

T21.

701. X -- coordinate of aperture center X (can omit, the X=0) Y when omiting -- coordinate of aperture center Y (can omit, the Y=0) A when omiting -- initiative plane (can omit, the A=0) R when omiting -- safe distance Q -- pitch chooses Q1 -- Rc1 ～ 1/2 Q2 -- Rc2 T -- cutting tool diameter the advantage of this program, origin need not slant buy reachs aperture center, can control whorl bulk through cutting tool compensation. 5.

The last word passes real test, this procedure is responsible, and compensate without cutting tool, after one-time treatment is over, whorl qualification! CNC Milling