G74 (siklus pembuatan lubang dengan mata bor/ Endface pecking drilling cycle)

 

Kode G74 digunakan untuk membuat lubang di permukaan benda kerja  menggunakan mata bor (drilling). Pada proses pembuatan lubang ini harus diperhatikan  bahwa sumbu dari mata bor harus sama dengan sumbu benda kerja atau sumbu spindel.

Format:

G74 R

G74 Z Q F

Keterangan:

R: harga jarak kembali

Q: kedalaman potong setiap kali penyayatan (1000 = 1 mm)

F: gerak makan.

Contoh penggunaan:

Dibuat lubang diameter 8 mm menggunakan mata bor diameter 8 mm. Kedalaman lubang 20 mm. Kedalaman setiap kali penyayatan 3 mm dengan gerak makan 0,2 mm/putaran.

 Program CNC

N10 G50 S1500 T0202 ;

N20 G97 S280 M3 M8;

N30 G0 X0 Z5. ;

N40 G74 R1.0 ;

N50 G74 Z-20.0 Q3000 F0.2 ;

G00 X100. Z100.;

contoh jobsheet

Summary

CNC lathe program to cut Outside Turning Drilling and Inside Boring,
Following Cycle G Codes are used in this cnc lathe program,
OD Turning Rough with G71 Turning Cycle
OD Turning Finish with G70 Finishing Cycle
ID Drilling with G74 Peck Drilling Cycle
ID Boring with G01 Linear Interpolation

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O0111 (EX.NO.1);

(BILLET DIA38.0*L36.0);

N1 (OPN OD PROFILE TURNING);

N2 G28 U0.0 W0.0;

N3 G92 S2500;

N4 G96 S180 M03;

N5 T0000;

N6 T0101;

N7 G00 X40.0 Z1.0;

N8 M07;

N9 G71 U1.0 R1.0;

N10 G71 P11 Q16 U0.5 W0.1 F0.15;

N11 G01 X16.0 Z0.0 F0.2;

N12 G03 X24.0 Z-8.0 R10.0 F0.10;

N13 G01 Z-20.0 F0.10;

N14 G01 X34.0 Z-28.0 F0.05;

N15 G01 Z-36.0 F0.05;

N16 G01 X40.0 F0.10;

N17 G00 Z10.0;

N18 G28 U0.0 W0.0;

N19 M09;

N20 M05;

N21 M01;

(OD PROFILE FINE TURNING);

N22G28 U0.0 W0.0;

N23 G92 S3000;

N24 G96 S250 M03;

N25 T0000;

N26 T0202;

N27 G00 X40.0 Z1.0;

N28 M07;

N29 G70 P11 Q16;

N30 G00 Z1.0;

N31 G28 U0.0 W0.0;

N32 M09;

N33 M05;

N34 M01;

(OPN DRILLING DIA 12.0MM);

N35 G28 U0.0 W0.0;

N36 G97 S650 M04;

N37 T0000;

N38 T0303;

N39 G00 X0.0 Z2.0;

N40 M07;

N41 G74 R0.5;

N42 G74 Z-17.0 Q5000 F.10;

N43 G00 Z2.0;

N44 G28 U0.0 W0.0;

N45 M09;

N46 M05;

N47 M01;

(OPN BORING);

N48 G28 U0.0 W0.0;

N49 G92 S1800;

N50 G96 S200 M04;

N51 T0000;

N52 T0404;

N53 G00 X14.0 Z1.0;

N54 M07;

N55 G01 Z-12.0 F0.15;

N56 G01 X13.0F0.20;

N57 G01 Z1.0 F.2;

N58 G00 X16.0;

N59 G01 Z-12.0 F0.15;

N60 G01 X13.0F0.20;

N61 G00 Z1.0;

N62 G28 U0.0 W0.0;

N63 M09;

N64 M05;

N65 M30;

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