Lập Trình Gia Công Trên Máy Điều Khiển Số

7/26/2019 Lp Trnh Gia Cng Trn My iu Khin S

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11

LP TRNH GIA CNG TRN MTRNH GIA CNG TRN MY

I

I

U KHI

KHI

N S

S

Ths.Phng Xun Lan

B mn CNCTM

Khoa C Kh


2/54

22

Ni dung c

dung c

a b

b

i gi

gi

ng

g

Khi nim chung Quy trnh lp trnh gia cng trn my iu khin s

Phng php lp trnh

Ngn ng lp trnh M ISO c bn

Cc chc nng dch chuyn, cc chu trnh

Cc chc nng ph Cc chc nng vn hnh my

Lp trnh theo kch thc tuyt i, tng i

Cc dng ni suy Cc chc nng hiu chnh

X dch im chun


3/54

33

Kh

h

i ni

ni

m chung

chung

Lp trnh L qu trnh thit lp cc chui lnh cho dng c ct t bn v chi

tit v s tay dng c cng vi vic pht trin cc lnchj ca

chng trnh sau chuyn tt c cc thng tin ny sang b phn

mang d liu c m ho c bit cho h thng iu khin s

Chng trnh

L ton b cc cu lnh cn thit gia cng chi tit trn my

cng c iu khin s T lnh

L s phi hp cc con s, ch ci lng ho chnh xc cc

chc nng yu cu thc hin Cu lnh

L s ghp ni ti thiu ca cc t lnh cn thit thc hin mt

dch chuyn hoc 1 chc nng khc ca my cng c


4/5444

Kh

h

i ni

ni

m chung

chung

Cu lnh tng qut (ISO 6983)NGXYZABCIJKHDTMSF;

N: S th t ca cu lnh trong chng trnh

G:iu kin hoc d liu dch chuyn

X, Y, Z: Cc to thng

A, B, C: Cc to quay

I, J, K: Thng s ni suy

HD: Hiu chnh

T: Dng c

M: Chc nng ph

S: Tc s vng quay

F:Lng tin dao

; : Kt thc cu lnh


5/5455

Kh

h

i ni

ni

m chung

chung

Quy trnh lp trnh gia cng NC


6/54

66

Kh

h

i ni

ni

m chung

chung

Quy trnh lp trnh gia cng NC Xc nh im 0 (W) ca chi tit gia cng

Lp s g t chi tit gia cng trn my CNC

Lp s to

Lp tin trnh cng ngh gia cng chi tit

Quy trQuy trnh cng nghnh cng ngh, th, th tt ccc nguyn cngc nguyn cng

Lp phiu dng c ct

SShihiu dao, vu dao, v trtr ttch dao, dch dao, d liliu cng nghu cng ngh

Lp trnh chng trnh NC theo ch dn lp trnh bng ct m lp

trnh NC

Th nghim, sa i chng trnh NC


7/54

77

PHNG PHHNG PHP LLP TRNHTRNH


8/54

88

Phng ph

hng ph

p l

l

p tr

tr

nh

h

S cc phng php lp trnh

Cc yu t:

VV trtr llp trp trnhnh

MMc c ttng hong ho c c

KiKiu mu my ty tnh snh s ddngng

CCc phng tic phng tin hn h trtr llp trp trnh cnh c

CCc phng tic phng tin hn h trtriiu khiu khin vn v kikim tram tra

Cc phng php lp trnh

Lp trnh ti phn xngLp trnh trong khu vc

chun bsn xut

Cp lnh bng tay ti my

Lp trnh bng my

Lp trnh tng

Lp trnh bng tay


9/54

99

Phng ph

hng ph

p l

l

p tr

tr

nh

h

Lp trnh ti phn xng

L qu trnh tm ra cc thng s iu khin v np chng vo h

iu khin thc hin trc tip trn my CNC thng qua bng iu

khin, sau khi lp trnh c th gia cng lun trn my.

Mt s chc nng ca bng iu khin

CCc nc nt bt bmm cc bibiu tu tng ring lng ring l cc ththggi ra mi ra mt ct cch trch trc tic tipp

ccc chc chc nng c bc nng c bn cn ca qua qu trtrnh tnh to ho hnh honh hoc nhc nhng chu trng chu trnhnh

gia cng ring.gia cng ring.

KK thuthut menut menua ra ca ra cc khc khnng lnng la cha chn thn thch hch hp trong mp trong mt lt lnhnh

vvc cc c ththcho ngcho ngi ii iu khiu khin (n (nh lnh l ccc dc d liliu vu v vvt lit liu, cu, ccc

gigi trtr ththch hch hp vp v ttc c cct,t, llng chng chy dao tngy dao tng ng sau khi chng sau khi chnn

c vc vt lit liu gia cng)u gia cng)

SoftSoft--keyskeys ll nhnhng phng phm bm bm gm gn lin lin vn vi mi mn hn hnh mnh m chchc nngc nng

cca cha chng khng xng khng xc c nh theo thnh theo thi gian (ci gian (c thth thay thay i tui tu theotheo

menu lmenu la cha chn vn vc hic hin thn th trn mtrn mn hn hnh)nh)

MMn hn hnh nh hoho ll ssm bm bo hn quo hn qu trtrnh lnh lp trp trnh bnh bng tay vng tay vnnhhnh an tonh an ton thng qua m phn thng qua m phng trn mng trn mn hn hnh inh iu khiu khinn


10/54

1010

Phng ph

hng ph

p l

l

p tr

tr

nh

h

Lp trnh trong khu vc chun b sn xut (ngoi phn xng)

L phng php lp trnh theo ngn ng lp trnh ph hp v c

lp vi my gia cng

Lp trnh bng tay c s tr gip ca my tnh

Theo ngn ngTheo ngn ng llp trp trnh phnh ph hhp bp bng cng cch dch dng tay g cng tay g cc phc phmm

cca ma my ty tnh nh soson thn tho chng tro chng trnh gia cng NCnh gia cng NC

LLp trp trnh bnh bng tay i hng tay i hi ngi ngi li lp trp trnh phnh phi ci c kikin thn thc vc vng vng v

hhnh hnh hc vc v cng nghcng nghgia cnggia cng..

NgNgi li lp trp trnh phnh phi bii bit cht chnh xnh xc dc dng dao cng dao c vv khkhnng snng s ddngng

chchng trn mng trn mt mt my CNC xy CNC xc c nhnh

Lp trnh t ng bng my

TT dd liliu thiu thit kt kchi tichi tit (dt (d liliu CAD) chuyu CAD) chuyn giao lin giao lin cho khu gian cho khu giacng (CAM) nhcng (CAM) nh hh ttch hch hp, lin hop, lin hon theo hai bn theo hai bc chc chnh sau:nh sau:

DDng menu Design ng menu Design vv chi tichi tit gia cngt gia cng

DDng menu Create Gng menu Create G--code code llp chng trp chng trnh gia cng NC cho chi tinh gia cng NC cho chi titt

v v, k, kt ht hp chp chy m phy m phng trn mng trn my ty tnhnh


11/54

1111

Phng ph

hng ph

p l

l

p tr

tr

nh

h

u im ca cch lp trnh bng my

Ngn ng lp trnh l thng nht cho cc phng php gia cng

khc nhau (tin, phay, khoan, laser)

Tit kim thi gian ng k khi m t chi tit v qu trnh gia cng

cn thit

Th hin bng ho cc m phng ng hc v hnh hc ca

chi tit trong qu trnh ct, trong mt s trng hp c th m

phng c dao c c th kim tra chng trnh d dng Chng trnh gia cng c lu gi rt thun tin cho vic

chuyn tin trc tip ti my, thng qua cc mng ni b hoc gin

tip qua cc vt mang tin

C th p dng cc gii php CAD/CAM-CNC tch hp- lin

thng- khp kn t thit k chi tit, lp trnh gia cng NC n gia

cng NC trn cc my cng c.


12/54

1212

NGN NGGN NG LP TRNHTRNH


13/54

1313

Phn

hn

lo

o

i

Cp thp

Lp trnh c s bng ngn ng ca h iu khin s (ISO code)

Cp cao

Lp trnh nng cao bng ngn ng lp trnh cao co v d (APT

Automatically Programmed Tool)


14/54

1414

c im

Tiu chun quc t ISO 6983 quy inh mt b m (ISO code) cho

cc my NC, CNC iu khin qu trnh gia cng c kh.

Chng trnh NC lp theo ISO l mt tp k t c c php ring

c lu gic lu gitrn trn a ma mm hay m hay a ca cng,ng,

c lc lp bp bng tay vng tay vi si s hh trtr cca ma mt ht h soson thn tho vn bo vn bn nn no o

hohoc lc lp tp tng (bng (bng phng phn mn mm lm lp trp trnh tnh tng trn mng trn my ty tnh nnh nii

vvi hi hiiu khiu khin cuar mn cuar my CNC)y CNC)

M ISO c b

ISO c b

n


15/54

1515

Cc chc nng iu khin v k t m ho

M ISO c b

ISO c b

n


16/54

1616

Cc lnh dch chuyn v chu trnh

M ISO c b

ISO c b

n


17/54

1717

Cc lnh ph tr

M ISO c b

ISO c b

n


18/54

1818

Cu trc mt chng trnh NC theo ISO-DIN 66025

Ngn ng

gn ng

lp tr

tr

nh theo m ISO c b

h theo m ISO c b

n

% PM; {Chng trnh chnh}

O; {S hiu chng trnh}

N01 G17 hoc G18; {Khai bo mt phng cn gia cng}

N02 G99; {Khai bo bin dng ca chi tit gia cng}

N03;

;

; {Cc cu lnh khc ca chng trnh}

;

M30; {Kt thc chng trnh}


19/54

1919

Cu trc ca ngn ng

Bao gm cc t xc nh c ghp ni vi nhau theo mt nguyn

tc c php cho trc.

Cc ch dn ny c ngi lp trnh tng kt thnh cu v a

vo trong my tnh

Ngn ng dng cho vn bn a vo b x l NC c tiu

chun ho

Hnh hc ca chi tit Ngi lp trnh phn tch hnh dng ca chi tit gia cng thnh cc

yu t hnh hc. Mi yu t hnh hc ny xc nh khi bt u

chng trnh v c trang b bng mt tn k hiu

Hu ht tt c cc ng vin hnh hc c th hin qua cc

thnh phn hnh hc c bn nh: im (POINT), ng thng

(LINE) v vng trn (CIRCLE)

Ngn ng

gn ng

lp tr

tr

nh APT

h APT


20/54

2020

6 loi cu lnh trong mt chng trnh gia cng NC theo ngn

ng APT

Cc cu lnh nh ngha ban u(nh ngha hnh hc, kch thc

ca phi, nh ngha hnh hc, kch thc chi tit cn gia cng, vt

liu gia cng, cc c tnh v thng s cu dng c gia cng) Cc lnh dch chuyn (nh v dng c gia cng, m t qu o

chuyn ng ca dng c gia cng)

Cc lnh m t nguyn cng (xc nh/t ch ct, chn dao,bt/tt dung dch trn ngui)

Cc lnh ph tr cng ngh (nh ngha dung sai, ch dng

my, cc lnh hiu chnh dao)

Cc cu trc iu khin (vng lp, chng trnh th cp, chng

trnh con, cc chu trnh gia cng)

Cc lnh tnh ton (thc hin cc php ton thng thng, tnh

ton cc hm s ton hc vi phn/tch phn.

Ngn ng

gn ng

lp tr

tr

nh APT

h APT


21/54

2121

Cu trc mt chng trnh vit theo ngn ng lp trnh APT

PROGRAM

USEMAC

USEDAT T

USEDAT M

DEFCON =

ENDCON;

DEFVAR

ENDVAR;

DEFTUR < Cc cu lnh xc nh dng cgia cng>

ENDTUR;

DEFGEO < Cc cu lnh nh ngha hnh hc>

ENDGEO;

DEFPRD;

PROFIL

ENDPRD;

DEFWP < Cc cu lnh nh ngha phi>

ENDWP;

START

FINI;

Sdng cctp c sn

nh ngha cchng s

nh ngha ccbin s

nh nghadng cg/c

nh ngha bindng hnh hcchi tit cn g/c

nh ngha chitit cn giacng

nh nghaphi

Phn chng

trnh chnh

Tn chngtrnh

Ngn ng

gn ng

lp tr

tr

nh APT

h APT


22/54

2222

Ngn ng

gn ng

lp tr

tr

nh APT

h APT

nh ngha mt im p=POINT/x,y,z - a cartesian point

p=POINT/l1,l2 - intersection of two lines

p=POINT/c - the center of a circle

p=POINT/YLARGE,INTOF,l,c - the largest y intersection of a line and a circle *Note: we can use YSMALL,XLARGE,XSMALL in place of YLARGE

nh ngha mt ng thng l=LINE/x1,y1,z1,x2,y2,z2 - endpoint cartesian components

l=LINE/p1,p2 - endpoints

l=LINE/p,PARLEL,l - a line through a point and parallel to another line

l=LINE/p,PERPTO,l - a line through a point and perpendicular to a line

l=LINE/p,LEFT,TANTO,c - a line from a point, to a left tangency point on a circle

l=LINE/p,RIGHT,TANTO,c - a line from a point, to a right tangency point on a circle l=LINE/LEFT,TANTO,c1,LEFT,TANTO,c2 - defined by tangents to two circles

l=LINE/LEFT,TANTO,c1,RIGHT,TANTO,c2 - defined by tangents to two circles

l=LINE/RIGHT,TANTO,c1,LEFT,TANTO,c2 - defined by tangents to two circles

l=LINE/RIGHT,TANTO,c1,RIGHT,TANTO,c2 - defined by tangents to two circles


23/54

2323

Ngn ng

gn ng

lp tr

tr

nh APT

h APT

nh ngha mt ng trn c=CIRCLE/x,y,z,r - a center and radius

c=CIRCLE/CENTER,p,RADIUS,r - a center point and a radius

c=CIRCLE/CENTER,p,TANTO,l - a center and a tangency to an outside line

c=CIRCLE/p1,p2,p3 - defined by three points on the circumference c=CIRCLE/YLARGE,l1,YLARGE,l2,RADIUS,r - tangency to two lines and radius

*Note: we can use YSMALL,XLARGE,XSMALL in place of YLARGE

Cc dng phc tp PLANE/ - defines a plane

QUADRIC/a,b,c,d,e,f,g,h,i,j - define a polynomial using values

GCONIC/a,b,c,d,e,f - define a conic by equation coefficients

LCONIC/p1,p2,... - defines a conic by lofting (splining) points

RLDSRF/ - a ruled surface made of two splines POLCON/ - define a surface using cross sections

PATERN/ - will repeat a motion in a linear or circular array


24/54

2424

Ngn ng

gn ng

lp tr

tr

nh APT

h APT

V d L1 = LINE / 10,15,0,25,40,0 [nh ngha ng thng L1 i qua 2 im c to

tng ng X,Y,Z l 10,15,0 v 25,40,0].

D5 = LINE / P1, PARLEL, D1 [ nh ngha ng thng D5 i qua im P1 v song

song vi ng thng D1].

D10 = LINE / RIGHT. TANTO, C1. LEFT, TANTO, C2 [ nh ngha ng thng D10tip tuyn vi vng trn C1 pha bn phi v tip tuyn vi vng trn C2 pha bn

tri]


25/54

2525

Ngn ng

gn ng

lp tr

tr

nh APT

h APT

Cc lnh dch chuyn cbn FROM/p - specify a start point

FROM/x,y,z - specify a start point

GOTO/p - move to a final point

GOTO/x,y,z - move to a final point GOTO/TO,p - move until the tool touches a point

GOTO/TO,l - move until the tool touches a line

GOTO/TO,c - move until the tool touches a circle

GOLFT/l1,TO,l2 - go on the left of l1 until the tool touches l2 GORGT/l1,TO,l2 - go on the right of l1 until the tool touches l2

GOBACK/l1,TO,l2 - reverses direction along l1 to l2

GOBACK/l1,TO,c1 - reverses direction along l1 to c1

GOUP/l1,TO,l2 - goes up along l1 to l2 GODOWN/1l,TO,l2 - goes down along l1 to l2

GODLTA/x,y,z - does a relative move

Note: TO can be replaced with PAST, ON to change whether the tool goes past the

structure, or the center stops on the structure.


26/54

2626

Cc lnh khc

Lnh b dao

TLLFT (Dap ct bn tri chi tit).

TLON (Khng b dao, lp trnh theo tm dao).

TLRGH (Dao ct bn phi chi tit).

Cc lnh iu khin my v cc lnh b sung:

Dung dDung dch trn nguch trn ngui: COOLNT (coolant).i: COOLNT (coolant).

CCt: CUTTER (cutter)t: CUTTER (cutter) Di chuyDi chuyn: MOVE (move).n: MOVE (move).

ChChy nhanh: RAPID (rapid).y nhanh: RAPID (rapid).

DDng cng c: TOOL (tool).: TOOL (tool).

TTc c cct: FEDRAT (feedrat).t: FEDRAT (feedrat).

GiGim tm tc c cct tt ti ni chuyi ni chuyn tin tip trp trnh cnh ct lt lm: MCHTOLm: MCHTOL

KKt tht thc: END hoc: END hoc FINI....c FINI....

Ngn ng

gn ng

lp tr

tr

nh APT

h APT


27/54

2727

V d

Ngn ng

gn ng

lp tr

tr

nh APT

h APT


28/54

2828

M ISO C B ISO C BN

M ISO c b

ISO c b

n


29/54

2929

Cc chc nng dch chuyn, cc chu trnh

Cc chc nng dch chuyn v cc chu trnh c biu th bng ccch ci a ch G v mt con s c hai ch s ng sau

Mt s chc nng dch chuyn c bn

G00:G00: ChChy dao nhanh khng cy dao nhanh khng ctt G01:G01: DDch chuych chuyn theo n theo ng thng thngng

G02/G03:G02/G03: DDch chuych chuyn theo cung trn cn theo cung trn cng/nng/nggc chic chiu kim u kim ng hng h

G17/G18/G19:G17/G18/G19: Gia cng theo mGia cng theo mt pht phng XY, XZ, YZng XY, XZ, YZ

G20/G21:G20/G21: HHn vn vmmt/incht/inch G90/G91:G90/G91: Ghi kGhi kch thch thc tuyc tuyt t i,i, tng tng ii

Cc chu trnh l nhng chc nng dch chuyn c nhc i nhc

li trong chng trnh. Chu trnh do ng ch to my quy nh v lu tr trong phn mm

G83:G83: Chu trChu trnh khoan lnh khoan l susu

G87/G89:G87/G89: Chu trChu trnh phay hnh phay hc vung, trnc vung, trn

M ISO c b

ISO c b

n


30/54

3030

Cc chc nng ph

Cc chc nng ph c biu th bng cc ch ci a ch M v mt

con s c hai ch s ng sau

Mt s chc nng ph c bn

M03/M04:M03/M04: Quay trQuay trc chc chnh theo/nnh theo/nggc chic chiu kim u kim ng hng h

M06:M06: Thay dao tThay dao tngng

M30:M30: KKt tht thc chng trc chng trnhnh

M ISO c b

ISO c b

n


31/54

3131

Cc chc nng vn hnh my

S vng quay trc chnh (S...)

Trn mTrn my tiy tin sn s ddng sng svng quay trvng quay trc chc chnh vnh v ttc c cct i kt i km vm vii

ccc lc lnh:nh:

G96 S120G96 S120 {{TTc c cct v = 120 m/pht v = 120 m/phtt}} G97 S1000G97 S1000 {{SSvng quay trvng quay trc chc chnh n = 1000 v/phnh n = 1000 v/phtt}}

Trn mTrn my phay chy phay ch ss ddng sng svng quay trvng quay trc chc chnhnh

S1000S1000 {{SSvng quay trvng quay trc chc chnh n = 1000 v/phnh n = 1000 v/phtt}}

Lng chy dao (F) Trn mTrn my tiy tin sn s ddng lng lng chng chy dao vy dao vi ci cc n vc n v khkhc nhauc nhau

G94 F120G94 F120 {{LLng chng chy dao = 120 m/phy dao = 120 m/phtt}}

G95 F0.25G95 F0.25 {{LLng chng chy dao = 0,25 mm/vngy dao = 0,25 mm/vng}}

Trn mTrn my phay chy phay ch ss ddng sng svng quay trvng quay trc chc chnhnh

F1000F1000 {{LLng chng chy dao = 1000 mm/phy dao = 1000 mm/phtt}}

Dng c ct (T..)

BiBiu thu th vv trtr cca da dng cng c cct trong ht trong hp tp tch daoch dao T01T01

Lp tr

tr

nh theo k

h theo k

ch th

h th

c tuy

tuy

t

i,

,

tng

ng

i


32/54

3232

Lp trnh theo kch thc tuyt i

Lp trnh theo v tr ca cc im ch.

im ch c gi tr to lun gn vi im 0 ca chi tt W (gc

kch thc xc nh v tr ca cc im ch)

Gc to c nh l im 0 ca chi tit W

Chc nng dch chuyn cho dng lp trnh ny l G90

Lp tr

tr

nh theo k

h theo k

ch th

h th

c tuy

tuy

t

i,

,

tng

ng

i


33/54

3333

Lp trnh theo kch thc tng i

im ch c gi tr to lun gn vi v tr ca dng c ct n

trc

Gc to thay i lin tc

ng dng ch yu i vi cc chu trnh v cc chng trnh con

Cc d

d

ng n

g n

i suy

suy


34/54

3434

c im chung

Dng tnh ton cc im trung gian trn qu o gia cng, n l

mt cng phn mm cng lin tc cc on gia tng bng nhau

theo cc gi tr to ca im xut pht Pa

Ni suy ng thng G00: Dch chuyn nhanh khng ct ca dng c t m hin ti ca

n n im tip theo c lp trnh vi tc ti a

G00 XG00 X YY ZZ G01: Dch chuyn dng c ct t im hin ti ca n n mt im

tip theo c lp trnh trn mt ng thng vi lng chy dao

gia lp trnh

G01 XG01 X YY ZZ FF

Cc d

d

ng n

g n

i suy

suy


35/54

3535

Ni suy cung trn

G02/G03: Dch chuyn theo/ngc chiu kim ng h

G02/G03 XG02/G03 XYYZZIIJJKKFF

X, Y, Z: ToX, Y, Z: Toiim cum cui ci ca cung trna cung trn

I, J, K: ToI, J, K: Totng tng i ci ca tm cung trn theo ha tm cung trn theo hng trng trc X, Y, Z soc X, Y, Z sovvi ii im m u cu ca cung trna cung trn

Cc d

d

ng n

g n

i suy

suy


36/54

3636

V d


37/54

3737

CC CHCHC NNG HINNG HIU CHCHNHH

Cc ch

ch

c nng hi

nng hi

u ch

ch

nh

h


38/54

3838

c im

Hiu chnh kch thc ca dng c nh chiu di, bn knh dao

H iu khin s tnh ton li qu o chuyn ng ca dng c

theo cc gi tr hiu chnh

To ra chuyn ng chnh xc ca li ct dc theo ng vin giacng hoc cc im ph

Cc chc nng dch chuyn

HiHiu chu chnh chinh chiu du di dao (mi dao (mi khoan, phay, dao tii khoan, phay, dao tinn)) HiHiu chu chnh bnh bn kn knh dao(phay theo bin dnh dao(phay theo bin dngng))

HiHiu chu chnh bnh bn kn knh lnh li ci ct dao tit dao tin (tin (tinn))

HiHiu chu chnh vnh v trtr dao (vdao (v trtrnh lnh li ci ct khi tit khi tinn))

Hi

i

u ch

ch

nh chi

h chi

u d

d

i dao

dao


39/54

3939

Phay,

khoan

Tin

c im

B chiu di dao l quy trnh hiu chnh khong cch gia chiu di

lp trnh ca dao v chiu di thc ca dao

Gi tr hiu chnh ca b nh dng c chn c cng thm vo

gi tr Z (vi phay, khoan) hoc X, Z (vi tin) c lp trnh cch n du

M lnh

G43 BG43 B

chichi

u du d

i dao dngi dao dng

G44: BG44: B chichiu du di dao mi dao m

G49: HuG49: Hu bb bb chichiu du di daoi dao

Hi

i

u ch

ch

nh chi

h chi

u d

d

i dao

dao


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4040

Cch tnh ton hiu chnh

Cng thc tnh hiu chnh chiu di dao (c tnh n x dch im

chun)

Z

d

= W

z

+ Z

t

+ H

ZZdd: Kho: Khong cng cch dch dch chuych chuyn theo trn theo trc Zc Z WWzz: Gi: Gi trtr toto llm vim vic c i vi vi tri trc Z (Thic Z (Thit lt lp bp bng lng lnh G54nh G54))

ZZtt: V: V trtrch trn trch trn trc Z (toc Z (to Z)Z)

H: GiH: Gi trtr cca sa sbbH H cc p dp dngng

V d -Wz = 0.02, v tr ch trn trc Z = 1.0, gi tr b H03 tng

ng vi -7.47 ta c khong dch chuyn thc ca dao s l

Zd = +0.02) + +1.0) + -7.47) = -6.45

V d -Wz = 0.02, v tr ch trn trc Z = -0.625, gi tr b H01 tng

ng vi -8.28 ta c khong dch chuyn thc ca dao s l

Zd = +0.02) + -0.625) + -8.28) = -8.885

Hi

i

u ch

ch

nh chi

h chi

u d

d

i dao

dao


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Phng php xc nh chiu di dao

Xc lp trc chiu di dao cch xa my

Phng php o xc lp bchiu di dao

Phng php o cinXc lp chiu di dao ct bnngoi my Gim thi gian g lp Dng g dao o lm tngchi ph

Yu cu sdng sx dch imchun G54-G59

Phng php o ph binXc lp chiu di dao ct trong

qu trnh g lp Tng thi gian glpKhng s dng sx dch im

chun G54-G59, s b chung cxc lp theo Z0.0000

Hi

i

u ch

ch

nh chi

h chi

u d

d

i dao

dao


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S dng chiu di dao chnh

Hiu chnh chiu di dao sdng phng php chiudi dao chnh. T02: dao chnh vi xc lp H02 = 0.0

Hi

i

u ch

ch

nh chi

h chi

u d

d

i dao

dao


43/54

4343

S dng chiu di dao chnh

Phng php ny c th rt ngn thi gian r rt

Dao chnh chn thng l dao di nht

Qui trnh xc lp:

1. Lp dao chnh vo trc chnh

2. Chu n 0 cho trc X v m bo so trn mn hnh tng i l

Z0.000

3. o chiu di dao chnh. Sau khi chm vo b mt o, ginguyn daovtr .

4. ng k gi tr tng ng vi gi trx dch theo Z dng trong

G54-G59 (Z m)

5. Trong khi dao chnh chm vo b mt o, xc lp gi trtrc Z tng

i l 0

6. o tng dao cn li ly tnh dao chnh thay v tzero ca my

7. Nhp cc gi tro vo chs b H trn mn hnh (mang gi trmvi mi dao ngn hn dao chnh)

Hi

i

u ch

ch

nh b

h b

n k

k

nh dao khi phay bin d

h dao khi phay bin d

ng

g


44/54

4444

Hi

i

u ch

ch

nh b

h b

n k

k



ng

g


45/54

4545

c im

Khi khng c chc nng hiu chnh, to ra mt bin dng vi

kch thc nh mong mun, ngi lp trnh phi thit lp mt bin

dng ng dng vi bin dng chi tit theo khong cch bng bn

knh dao. Vi chc nng hiu chnh bn knh dao ny, khi phay cc bin

dng, h iu khin s t ng tnh ton qu o chuyn ng ca

tm dao sao cho c th to ra bin dng ca chi tit cch xa tm

dao mt khong bng bn knh dao

Gi tr hiu chnh lu tr trong b nh v d liu dao s c gi ra

khi c lnh hiu chnh

Hi

i

u ch

ch

nh b

h b

n k

k



ng

g


46/54

4646

Cc t lnh hiu chnh

G41: Dao bn tri ng vin gia cng

G42: Dao bn phi ng vin gia cng

G40: Hu b lnh hiu chnh chn

Hi

i

u ch

ch

nh b

h b

n k

k

nh

h

nh l

h l

i c

c

t dao ti

dao ti

n


47/54

4747

c im

nng cao tui bn dao tin v cht lng b mt gia cng ngita lm trn nh li ct dao tin. Bn knh nh li ny ct dnn sai lch ng vin gia cng ca chi tit

H iu khin CNC loi b cc sai lch ny bng lnh b bnknh nh li ct.

Gi tr ca bn knh nh li ct c nhp vo trong h iu khinnh mt gi tr hiu chnh v s c h iu khin x l khi gi

lnh hiu chnh

Hi

i

u ch

ch

nh b

h b

n k

k

nh

h

nh l

h l

i c

c

t dao ti

dao ti

n


48/54

4848

Phng thc hiu chnh

Khi gi chc nng hiu chnh, h iukhin s t ng tnh ton qu o tmca nh li ct dao tin theo bin dngca chi tit v cch mt khong bng bn

knh ca li ct.

Cc vect hiu chnh khc nhau theo ccgc phn t


49/54

4949

X D

D

CH I

H I

M CHU

CHU

N

X d

d

ch i

h i

m chu

chu

n


50/54

5050

c im

X dch im chun c s dng ng nht im 0 ca chi tit

hay chng trnh trng vi im 0 ca my.

KhoKhong cng cch tch tiim 0 cm 0 ca chi tia chi tit t n in im 0 cm 0 ca ma my ngy ngi ta gi ta gi li l

khokhong cng cch x dch x dch ich im chum chun.n. Sai lch v tr ny c xc nh v ci t vo trong b nh hiu

chnh cho x dch im chun

Khi gi lnh x dch im chun, h iu khin s cng thm vo

cho cc gi tr lp trnh cc gi tr hiu chnh ny

GGi li lnh x dnh x dch ich im chum chunn G54G54G59G59

HuHu bb llnhnh G53G53

X d

d

ch i

h i

m chu

chu

n i

i

u ch

ch

nh

h


51/54

5151

c im

L x dch im chun lu gi trong b nh hay ni cch khc

l x dch im chun iu chnh

Cc kch thc x dch chnh xc c xc nh hoc bng cc

thit b o hoc do ngi vn hnh my trc khi tin hnh giacng thc hin v c ci t vo b nh hiu chnh

X dch im chun iu chnh c ngha ln khi gia cng trn cc

bn my.

NgNgi ta ci ta cn thin thit cho gia cng 4 mt cho gia cng 4 mt ct ca chi tia chi tit,t, 44 iim 0 cm 0 ca chi tia chi titt

khkhc nhau tc nhau tt ct c ccn n c dc dch chuych chuyn n n in im 0 cm 0 ca ma myy

X d

d

ch i

h i

m chu

chu

n i

i

u ch

ch

nh

h


52/54

5252

V d

X d

d

ch i

h i

m chu

chu

n lp tr

tr

nh

h


53/54

5353

c im

Khi dng x dch im chun lp trnh, cc gi tr x dch phi c

bit r trong chng trnh.

Cc gi tr x dch im chun lp trnh trong chng trnh gia cng

khng c ci t vo trong b nh hiu chnh Khi gi x dch im chun lp trnh h iu khin s cng thm

vo cc gi tr x dich c ch n du cho tt c cc gi tr to

.

X dch im chun lp trnh c ngha khi cn lp li chng trnh

gia cng nhiu ln cc v tr bt k trn chi tit

khoan ckhoan cc dy lc dy l giging nhaung nhau

gia cng cgia cng cc c ng ving vin nh nhaun nh nhau

X d

d

ch i

h i

m chu

chu

n l

l

p tr

tr

nh

h


54/54

5454

V d

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