cnc turning jhbo

8/3/2019 Cnc Turning JHBO

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CNC turning adalah bermula dengan penghasilan mesin

larik.

Menggunakan mesin larik untuk kerja-kerja

melarik,menggerek, mengerudi, membuat benang skru dan

sebagainya.


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Numerical Control

1950 - 1975

NCNC

Computer Numerical Control with integratedcomputer

1970

CNCCNC

FLEXIBLEMANUFACTURING SYSTEM

1990

FFSFFSComputer Aided Design / Drawing

1958

CADCAD

Computer Aided Design and Computer AidedManufacturing

1975

CAD / CAMCAD / CAM

Computer integrated manufacturing withplanning, design and manufacturing

1989

CIMCIM


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Program ini mula dibangunkan pada awal tahun 1970selepas program DNC yang sangat popular sebelumprogram ini.Keperluan system kawalan ini ialah memudahkanpenyuntingan aturcara,menyediakan analisisdiogrisis,mengawal pembuatan,menambah kawalansesuatu perkakas secara ekonomi,dan kos bagi

program ini adalah murah.


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PLPG JPTK FKIP UNS

Mesin CNC vs Konvensional


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PLPG JPTK FKIP UNS

Bahagian-bahagian

Mesin CNC Lathe

Chuck

/Cekam

Controller

Rumah Alat/

Tool turret

Motor

Utama

Eretan

memanjangPaksi- Z

Lampu

Eretan

melintang

/paksi- X


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MAKINO (JAPAN)NAKAMURATOME SC-150M (JAPAN)


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HAAS HSI-RP: 2 Pallet Horizontal

Machining Center


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CNC MAZAK (JAPAN)


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PEMBUANGAN

TATAL @PE

NYEJ

UK


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(P

AP

AN KAWALAN)


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BAHAGIAN CONTROL PANEL

A) POWER OFF

B) POWER ON

C) CYCLE START

D) FEED HOLD

E) FEED RATE CONTROL

F) PANEL HAND WHEEL

G) EMERGENCYSTOP


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CENTER DRILL

ENDMILL KARBIDA


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GAMBARAJAH MATA ALAT JENIS

CARBIDA


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CNCCNC

PROGRAMMINGPROGRAMMING


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Part program is a set of instructions which instructs themachine tool about the processing steps to be performed forthe manufacture of a component.

Part programming is the procedure by which the sequence ofprocessing steps and other related data, to be performed onthe CNC machine is planned and documented.


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N-Word (Sequence Number) :

The first word in every block is the sequence

number. The sequence number is used to identify the

block. The sequence number is preceded by word N

and is written as N001, N005, etc.


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G00 rapid motionG01 line interpolation motionG02 CW interpolation motionG03 CCW interpolation motionG04 Dwell

G09 exact stopG10 set offsetG17 XY planeG18 ZX planeG19YZ planeG20 select inchesG21 select metric

G28 return to reference pointG29 return from reference pointG81 drill cycleG82 counter bore cycleG83 deep hole drilling cycleG90 absolute positionG91 INCREAMENTAL position

G99 rapid to retract plane


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MENGGUNAKAN PERKAKASAN EXSL - WIN


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:0300; N10 G97 G96 S2000 T0101 M3; N20 G00 X52 Z2; N30 G71 U0.3 R2; N40 G71 P50 Q110 U0.1 W0.1 F0.1; N50 G01 X20;

N55 G01 Z0; N60 G01 X20 Z-15; N70 G02 X30 Z-20 R5; N80 G01 X40 Z-30; N90 G01 X40 Z-40; N100 G03 X50 Z-45 R5; N110 G01 X50 Z-70; N120 G70 P50 Q110 T0202 F0.1; N130 G28 U0 W0; M05; M30;


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Turning Center Coordinate System

Zis the length ofthe part.

X is the diameterofthe part.

The partially shaded circlerepresents theorigin.

The programmerchooses thelocationofthe originon the part,

usually the back, centerorfront,

center.

We will always use the back,centersince it simplifiesmachine

set-up.

Program to move the tool, notthe work.


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Suppose we want to move from the origin

through points A, B, C, D, and E. We can

move: incrementally distance from previous point,

or

absolutely new distance from the origin


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B

A

Point

Incremental Absolute

Z X Z X

Origin 0 0 0 0

A 1 1 1 1

B 2 0 3 1

C 0 1 3 2D 2 0 5 2

E 1 4 6 6

Incremental vs.

Absolute Programming

C

E

D


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Sistem kod M mengawal keseluruhan mesin, menyebabkan iaberhenti,bermula, memasang pendingin (coolant), dansebagainya.

Alatan mesin yang berbeza boleh menggunakan kod yangsama untuk melaksanakan fungsi yang berbeza, walaupunmesin yang mengunakan pengawal CNC yang sama.

Contoh arahan menggunakan kod M:

Arahan membuka pelincir Arahan pergerakan pusingan ikut jam atau lawan jam bagi

alat pemotong


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M00 program stopM01 optional program stopM02 program endM03 spindle on clockwiseM04 spindle on counter clockwiseM05 spindle stopM06 tool changeM08 coolant on

M09 coolant offM10 clamps onM11 clamps offM30 end of program, reset to start


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G-code adalah nama yang digunakan bagibahasa pengaturcaraan yang mengawal mesindan memberitahu peralatan mesin jenis kerjayang perlu dilakukan, contohnya :

Pergerakan yang cepat

Satu siri pergerakan suapan

Mengawal pergerakan suapan dalam garislurus atau lengkungan


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Common Fanuc G Codes

Code Description

G00 Rentasan deras (titik ke titik)

G01 Suapan dalam gerakan lelurus

G02 Penentu dalaman membulat bagi lengkok ikut jam

G03 Penentu dalaman membulat bagi lengkok lawan jam

G20 Pemprograman dalam inci

G21 Pemprograman dalam inci

G28 Kembali kepada kedudukan asal


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M00 programmed stop M01 optional stop M02 program end M30 program end with resetting

M03 activate spindle in clockwise rotation M04 activate spindel in counter - clockwise rotation M05 deactivate spindle

M08 activate coolant M09 deactivate coolant

M48 activate feedrate override dial M49 cancel feedrate override dial

M41 select lower spindle speed range M42 select higher spindle speed range


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XX ZZ

aa 00 00

bb 4040 00cc 4040 --4040

dd 8080 --4040

ee 8080--9

090

ff 110110 --9090

gg 110110 --140140


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NN GG XX ZZ

N10N10 G00G00 5050 11

N20N20G

01G

01 5050--2525

N30N30 G01G01 7575 --2525

N40N40 G01G01 100100 --7575

N50N50G

01G

01 100100--100100

N60N60 G01G01 101101 --100100


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NN GG XX ZZ


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NN GG XX ZZ

N10N10 G00G00 2525 11

N20N20 G01G01 2525 --12.512.5

N30N30 G01G01 37.537.5 --2525

N40N40 G01G01 5050 --2525

N50N50 G01G01 5050 --5050

N60N60 G01G01 7575 --62.562.5

N70N70 G01G01 7575 --7575

N80N80 G01G01 100100 --87.587.5

N90N90 G01G01 100100 --100100

N100N100 G01G01 101101 --100100


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NN GG XX ZZ II KK RR

N10N10

N20N20

N30N30

N40N40

N50N50

N60N60N70N70

N80N80

N90N90


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NN GG XX ZZ II KK RR

N10N10 G00G00 2525 11

N20N20 G01G01 2525 --2525

N30N30 G02G02 5050 --37.537.5

2525 00

N40N40 G01G01 5050 --5050

N50N50 G02G02 7575 --

62.562.5

2525 00

N60N60 G01G01 7575 --7575

N70N70 G03G03 100100 --87.587.5

00 --12.512.5

N80N80 G01G01 100100 --100100

N90N90 G01G01 101101 --100100


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1. Examine the part

drawing throughly andget a rough idea of how

you want to proceed.


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2. Figure out how to

hold the raw materialso you can perform as

much machining as

possible in one setup.


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3.Decide what cutters

are necessary toperform the

various operations.


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4.Write down the exact

sequence of operationsnecessary to machine

the part, one cutter ata time.


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5. Convert your

sequence of operationsinto a program and

simulate the program ifpossible


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Most machines only allow one M code per block.

The tool code (T) is four digits the first two for

the tool number, the second two for the offsetnumber. They are usually the same.

(exp: T0101 / T0202)

All alpha characters must be in uppercase


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1. Install all cutters in the proper holders.

2. Install the fixture or chuck on the machine and

establish the WCS (Work Coordinate System)

3. Set the cutter offsets.

4. Simulate the program on the machine.

5. Slow rapid traverse down as low as possible.

6. Initiate the single step cycle with your hand on

the E-stop button at all times.

7. Carefully watch the operations, press the feedhold button to take notes for any corrections.

8. Install a part and go to step 5.


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Lakarkan gambarajah projek anda menggunakan

software CAD atau kaedah insani.

Ukuran maksima untuk projek Panjang tidak lebih 100 mm

Diameter tidak lebih 30mm

Buat program secara insani menggunakan G code

dan M code berdasarkan rekabentuk yangdilakarkan.


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:0029;(BISHOP)

N10 G97 S2000 M03 T0101;

N20 G00 X40 Z1;

N30 G71 U1 R2;

N40 G71 P50 Q209 U0.5 W0.5 F1;

N50 G01 X0 Z0;N60 G03 X2 Z-1 R2;

N150 G03 X10 Z-7.5 R8.5;

N160 G01 X9 Z-9;

N170 G03 X10 Z-11 R2;

N180 G01 X9 Z-15;

N190 G01 X9 Z-18

N200 G01 X13 Z-36N201 G01 X15 Z-36.5;

N202 G01 X15 Z-37;

N203 G02 X17 Z-38 R1;

N204 G03 X21 Z-40 R2;

N205 G01 X21 Z-43;

N206 G03 X23 Z-45 R2;

N207 G02 X25 Z-47 R2;

N208 G01 X25 Z-50;

N209 G01 X25 Z-55;

N210 G70 P50 Q 209 T0101 F0.5;N211 G28 U0 W0;

N212 M05;

N213 M30;

Length : 100mm

Diameter:25mm

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