CNC ????? ????? ??? ?????? ???? ??????-Shenzhen Aima Technology Co., Ltd

?? 9312?;G32 ????? ?? ?????? ???? ????:

Overview: The end face threads are mostly rectangular threads, and the self centering chuck (disc thread) of the lathe uses this structure. ?? ???? ?? ??? ??? ??? ??? ?????? ???? ??? ??????? ??? ????? ?????? ??.

????? 2-8 ??? ???? ???? ?? ?????? ?????? ??

CNC ????? ????? ??? ?????? ???? ??????(pic1)

????? (a) ??? ???? ?? ???? ???? ???? ?????? ?? ??????? ????? ??? ??????? ????? (b) ??? ???? ?? ??? ?? ??? ?? ???? ??? ??? ??. ?? ?? ????? ?? ???? ?? ?? ?? ??? ?? depth 5? ?? ?? ???? ??? ??? ????? 0.1? ????? ?? ????? ??.

Determination of end face thread rotation direction:

?????? ???? ?? ???? ??? ????? ???? ?? ??? ????? ?? ??? ????? ???? ?? ??? ????? ??

Instruction format: G32 X-F_ (X is the coordinate of the cut end point, F is the lead of the thread)

??????? ???????

G99 M3 S500 T0202; (??? ???? B=3?)

G0 X100 M8;

Z-0.5;

G32 X40 F3.0;

G0 Z3;

X100;

Z-0.7;

G32 X40.F3.0

G0 Z3;

X100;

Z-1.0;

G32 X40 F3.0;

G0 Z3;

X100;

Z-1.5;

G32 X40 F3.0;

G0 Z3;

X100;

Z-2.0;

G32 X40 F3.0;

G0 Z3;

X100;

Z-2.5;

G32 X40 F3.0;

G0 Z3;

X100;

Z-3.1;

G32 X40 F3.0;

G0 Z90;

M5;

M30;

CNC ????? ????? ??? ?????? ???? ??????(pic2)

??? ????: ?? ?????? ?? ????? ?? ???? ???? ??????

?? 931313;Variable Pitch Thread Processing Introduction

??? ???? ??? CNC ?????? ???? Guangzhou CNC (GSK) ??????? ???? ?? ???????? ??? ???? ????? ????? ?? ??? ????? 2-10 ??? ?????? ???? ???:

CNC ????? ????? ??? ?????? ???? ??????(pic3)

??? 2-10 ??????? ?????? ????? ??? ??? ????

????? ?????:

M274 ?? ??? ?? ???? ?? 1.34=5.2mm;

M2712 ?? ??? ?? ???? ?? 1.312=15.6mm;

??? ?? ????? ??? ?? ?????? ????? ?? ????? ??:

?? ????? ?????? 27-5.2=21.8?.

?? ??????? ??? ???? ?? ????? ???? ???? ??????? ?? ??? ?? ?? ????? ???? ??? ?? ???? ?? ???? ?? (P=12).

??????? ???????

G99 M3 S200 T0202;

G0 X30;

Z3;

X26;

G32 Z-20 F4.0;

G32 Z-56 F12;

G0 X30;

Z3;

X25.6;

G32 Z-20 F4.0;

G32 Z-56 F12;

;

G32 X30;

Z3;

X21.8;

G32 Z-20 F4;

G32 Z-56 F12;

G0 X30;

Z90;

M5;

M30;

The so-called variable pitch thread refers to a specified reference pitch value F starting from the thread cut in, and then generating a pitch difference K (increase or decrease) every other pitch

??? ???? ????? ??? ?? ??NUC ?? ????? ????? ??? ??? ???? ??? ??????? ??? ???? ?? ????? ????? ?? ??? ??? ??? ????? G34 ??.

????? ?????: G34 X_Z_F_K_;

?? ?? ??????? ???? ??? ?? ???? ?? ????? ????? ?? ?????? ???? F ???? ???? ?? ???? ??? ?? ??? ?? ??????? ???? ??? K ??? ???? ???? ?? ????? ??? ??? ??? ??? K ?? ?????? ?? ????? 0.0001-500.000? ??? ???? ?? ???? ??? ?????? ???? ??.

CNC ????? ????? ??? ?????? ???? ??????(pic4)

????? ???? ??? 5 ??? ??? ??? ????? 1??? ??? ???? ???? 50??? ??? ??? ??????? G34 Z-50 ?? F5. K1.

?? 9314?

Multi line threads are generally used for transmission and are straight threads. CNC Machining of multi line threads can be done by calling subroutines using G92. Imported machine tools also support G32 instructions for machining multi line threads, and G76 instructions can also be used for machining multi line threads (as discussed later).

G92 calls subroutines to process multi thread machining as shown in Figure 2-11.

CNC ????? ????? ??? ?????? ???? ??????(pic5)

????? ??? ???? ?? ????: M279/3

?? ?? ?????? M27 ?????? diameter ??? ? ???? ??? ??? ??? ? ??? ??.

??????: lead=pitch lines ?? ?????? ?????: ?? ??? ??? ??? ??? ??? ???

????? ?????:

???? ??????=27-0.133=26.61?;

?? ?????=27-1.33=23.1?;

??????? ???????

Subprogram (O0046)

G92 X26 Z-40 F9;

X25.7;

X25.4;

X25.2;

X25.0;

;

X23.1;

M99;

???? ???????

G99 M3 S700 T0202;

G0 X30 M8;

Z3;

M98 P0046;

G0 X30;

Z6;

M98 P0046;

G0 X30;

Z9;

M98 P0046;

G0 Z90;

M5;

M30;

Z3. Z6. Z9. Increase one pitch per positioning (P=3)

??? ??????? ?? ??? ??????? ??? ???? ?? G32 ????? ?? ??? ??

????? ?????: G32 X_Z_F_Q_;

Where X and Z are the end point positions of the thread, F is the thread lead, and Q is the starting angle of the thread. ?????? 0.001 ??? ?????? ????? ???? ???? ?? ????? ??? ???? ???? ?? ?????? ???? ?? ??? ????? ??????? 180 ?? ?? Q180000 ?? ????? ???? ????

???? ????? Q ??? ????? ????? ???? ?? ??? ?? ??? ????? ??? ???? ??? ???? ????? ??? 0 ????? ??

Multi thread machining is effective for G32, G34, G92, and G76 instructions.

?? 9315?

CNC ?? ?? G76 ???? ???? ???? ???? ???? ?? ????? ????? ???? ???? ?? ????? ??????? ??? ???? ??? ???? ???? ???? ???? ???? ???? ?? ????? ????? ??? ???? ???? ???? ?? ??? ?????? ?????? ???? ????? ?? ????? ???? ??? ??? ??? ??? ??????? ????? ?? ????? ?????????? ????? ?? ???? ????? ?? ?? ??. ??? ??? ??? ?? ??????? ?? ????? G32 ??? subroutines ?? ????? ???? ??? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ?????

?????????? ??? ????? ?? ?????? ?? ?????:

(1) ?? ???? ???? ???? ???? ?? ?? ?? ?? ??????? ???? ?? ???? ????? ?? ????? ????? ?? ????? ???? ?? ??? ?? ????? ?? ??? ????? ?? ????? ?? ???? ???? ?? ?? ???? ???

(2) ????? ?? ?????? ????? ?????? ?? ??? ???? ??? ????? ????? ?? ???? ???? ?? ????? ????? ?? ??? ??? ?? ???? ???? ?? ???? ??? 1.7? ?? ???? ???? ?? ???????? ???? ???? ????? ???? ?? ?? 5? ?? ??? ??? 1.2-1.4? ?? ??? ???? ??. ??? ?? ???? ?? ???? ??? ???? ?? ?????? ???? ?? ??? ????? ??? ???? ???? ??? ?? ?? ????? ?? ???? ???? ??? ????? ?? ??? ???? ??? ???? ???? ??? ??? ????? ????? ??? ??? ???? ?? ?? ????? ??? ?? ???? ??? ?? ?? ???? ??? ?? ???? ??? ?? ???? ?????? ?? ??? ????? ????? ??? ???? ?? ????? ??? ????? ?? ???? ??? ??? ???? ?????? ???? ?? ???? ?? ???? ??.

(3) ???? ?? ????? ???? ?? ???? ??? ?? ??? ?? ?????? ?? ?????? ?? ???? ???. ??? ?? ??? ?? ??? ?? ??? ?? ???? ?? ??? ??? ?? ???? ?? ????? ??? ??? ?? ??? ?? ???? ?? ?? ?? ?? ?? ??? ?? ??? ??? ??? ?? ???? ?? ??? ???? ?? ?????? ??? ???? ?? ???? ??? ?

(4) Subroutines ?? ????? ???? ???? ??? ??????? ?? ??? ??????? ?? ??? ?? ???????? ??????? ?????? ????

1. ?????????? ???? ?? ????

(1) ????=????? diameter+(0.5P+ac) 2+1 ?? ?????? ????? X ????? ?? ???? P ?? ??? ac ??? ??? ??? ?????? ??? ??? 0.5P+ac ??? ?? ???? ??. ???? ???? ??? ?????? ???? ??? ??? ?? ?????? ?? ????? ??? ??? ??? ?? ????? ?? ????? ?????? ????.

CNC ????? ????? ??? ?????? ???? ??????(pic6)

(2) ???? ???? ????? X ?????? X=????? diameter - ???? ??? ???? ???? ?? ????? ???? -0.2

(3) ?? diameter=nominal diameter - (0.5P+ac) 2

(4) ?????? ?????=(???? ????? ????? ?? X-??? - ?? ??????)/X-???? ??? ??? (?????? ???)+1

(5) U=X ????? ???? ?????? ????? ?? - ???? ??? ????? ?? X ?????.

2. ????? ?? ?????: ??????? ????? ??? ????? ????? ?? ????? ??????? ??? ???? ?? ?? ????????? ?????? ?? ?????? ????? ??? ????? ?????? ?? ???? ?? ???? ?????? ??? ???? ????? ??? ???? ????? ??? ????? ??? ?????? ??? ?? ?? ??? ????? ????? ??? ?? ?? ???? ???? ?? ??? ???? ????? ???? ?? ??? ???? ???? ???? ?? ??? ???? ???? ???? ?? ????? ??? ????? ??? ????? ?? ??????? ???? ???? ?? ??? ??? ??? ?????? ?? ????? ???? ????? ????? ??? ???? ??????? ??? ????? ??? ???? ?? ??? ??? ????? ????? ??? ???? ??? ??? ??? ????? ????? ?? ????? ???? ??? ?? ??? ??? ??? ?????? ?? ????? ??? ????? ????? ????? ???? ??????? ??? ????? ??? ???? ?? ??? ??? ????? ????? ??? ???? ??? ???

CNC ????? ????? ??? ?????? ???? ??????(pic7)

[trapezoidal thread machining ?? ????] ???? ?? ???? ?? ????? ??? ?????? ???? ??? ?? ??? ????????? ???? ????? ?? ??? ??.

CNC ????? ????? ??? ?????? ???? ??????(pic8)

(1) ??? ?????? ????? X ?????

X=nominal diameter+(0.5P+ac) 2+1=36+(0.56+0.5) 2+1=44

(2) ???? ?? ?????? ???? ????? ?? ????? ?????? ?? ???? ??? ???? ?????? ?? ???? ???? ????: ???? ?????? 0 ??? ???? ?????? -0.375 ??? ??? ????? ???? -0.2 ??. ???? ??? ???? ?? X ???? 36-0.2-0.2=35.6 ??

(3) Minor diameter=nominal diameter - (0.5P+ac) 2=36 - (0.56+0.5) 2=29.

(4) ?????? ?????=(???? ????? ????? ?? X-??? - ?? ??????)/X-?????? ??? ??? (?????? ???)+1=(35.9-29)/0.1+1=67

(5) U=??? ?????? ????? X ????? - ???? ??? ????? X ?????=44-35.6=8.4

4. ???????? ??? ?? ???? ???? ?? ??? ???? ?? ?? ??

???? ??=36

???? ?? ?????? d ?? ???? ???? ?? ??? ?? d-0.5p=36-3=33? ????? d=33

Tooth height=0.5p+ac=3.5

???? ?????? d=d? ???? -2h=29

Crown width f=0.336p=2.196

Tooth base width w=0.366p 0.536a=2.196-0.268=1.928

????? ?? ????? ??? ?? ??? ???????? ??? ?? ??????? ???? ????? ?? ?? f=1.5? ?? ??? ????? ?? ?????

3.1? ????? ?????? ?? ?????? ?? ??? ????? ?????? ?? ??????? ????? ????? ?????? M=d+4.864d-1.866p=36.88? ??? ????? ?????? ?????? ????? ?? (0-0.355) ???? ???? ?? ?? ????? ??? M=36.525-36.88

5. CNC ??????? ???

G99 M3 S300 T0101;

G0 X44 Z8; (44 ???? ?????? ?? X ????? ??)

M8;

M98 P470002; (47 ??? ?????? ????? ?? ????? ??)

M98 P200003; (?? ???? ?????? ????? ?? ????? ??)

M9;

G0 X100 Z100;

M30

??? ?????? ??? ?????? ????

O0002

G0 U-8.4; (8.4 ?? U-???? ??)

G32 Z-37 F6;

G0 U8.4;

Z7.7;

U-8.4;

G32 Z-37 F6;

G0 U8.4;

Z8.3;

U-8.4;

G32 U0 Z-37 F6;

G0 U8.3;

Z8;

M99;

???? ?????? ???????? ???? ???? ??

O0003;

G0 U-8.4;

G32 Z-37 F6;

G0 U8.4;

Z7.9;

U-8.4;

G32 U0 Z-37 F6;

G0 U8.4;

Z8.1;

U-8.4;

G32 U0 Z-37 F6;

G0 U8.3;

Z8;

M99;

???? ?? ??? ???? ?? ?? ??????? ??? G92 subroutines ?? ????? ???????? ?? ???? ??.

???? ???????

?? ??

G00 X44 Z6; (???? ???? ??? ?????? ?? ?????? ??) Φ 44mm End Face Outer 3mm)

M98 P60002; (???? ???? O0002 ????????? 6 ??? ????? ??)

M98 P80003; (???? ??? ????? ?? ???? ???? ???? ???? ???? ???? ???? ???? ???? ???? ???? ???? ????)

M98 P80004; (??? ???? ????? ?? ???? ??????? O0004 ???????? 8 ??? ????? ???)

M98 P80005; (???? ???? O0005 ??? ????? 8 ??? ??? ???? ??)

G0 X100 Z100; (????? ???? ??? ??????? ?? ???? ????? ?? ??? ????? ??)

?? ??

O0002

G00 U-0.5; (?? ????? ?? ????? ?? ???? ??? ????)

M98 P0006; (?????? ??? ????? O0006 ?? ??? ??? ??)