Line cut is in numerical control electric spark the applied method in plastic pattern treatment

, ltd, shanghai 201203, china) Abstract: Of CNC WEDM Apply In The Plastic Mould Process, and This Paper Discuss Special Method Of WEDMin The Plastic Mould Process.

Key Words: WEDM; Line cut machines electric spark of numerical control of foreword of The Plastic Mould Process; Special Method 1 is an omnibus technology that involves much door subject, it is the mould makes medium brunt equipment. Shape the mould abbreviation of plastic products is provided for plastic pattern, the plastic product that plastic mould produces is in industry of mechanical, electron having wide application. In metallic treatment, numerical control electric spark the edge tool that line cut is plastic pattern treatment from beginning to end. It is movable mould, fixed die no matter, spare parts, still be special treatment circumstance, want a work out to give right numerical control formula only, line cut meets electric spark produce mainer and mainer effect in plastic pattern treatment surely. Electric spark of 2 numerical control the characteristic of line cut accuses cut of electric spark line because of number is digital system a kind of method that electric energy uses to process work directly below control, because of some the characteristic that becomes independent than having oneself with photograph of other treatment means: (1) use linear electrode silk to make electrode directly, do not need to make special electrode, but the design of managing electrode, production charge. (2) can process the work with the complex form that machine a method hard with traditional cutting or cannot process. Require the control process with different work out only to different workpiece, realize automatic treatment very easily to the workpiece of different figure, suit small lot appearance very much complex part, odd a treatment with preproduction, and treatment cycle is short. (3) use electric corrode to machine a principle, electrode silk and workpiece are not contacted directly, both the effect between is very little, so electrode silk, clamping apparatus does not need too high intensity. (4) traditional car, mill, in getting treatment, cutting tool hardness must compare work big, and the electrode silk material of line cut machine tool need not compare numerical control electric spark workpiece data is hard, can save auxiliary time and cutting tool cost. (5) use report, heat energy to undertake machining directly, the treatment parameter that can machine precision to the influence conveniently (speed of pulse width, removed, servo) undertake adjustment, be helpful for those who machine precision rising, facilitating implementation machines the automation control of the process. (6) working fluid uses water radical emulsion or pure water commonly, cost is low, won't produce fire. (7) use four-axle or 5 axes linkage, can machine body of abnormity of face of taper, fluctuation or swing tower to wait for a spare parts. (8) because electrode silk is finer, can machine imperceptible abnormity conveniently aperture, narrow seam and complex and sectional model column, model aperture. Because cut,seam very narrow, quantity of actual metal purify is very few, the utilization rate of material is very high. Have important sense to managing and treatment, precious metal. (9) the long electrode silk that uses shift undertakes machining, make the loss of silk of unit length electrode less, compare to machining the influence of precision thereby small, special in treatment of cut of silk thread of don't go yet, electrode silk is one-time use, electrode silk loss is smaller to machining the influence of precision. Because cut of electric spark line machines the characteristic that has a lot of highlighting, developing domestic and internationally consequently very fast, already won wide application in plastic mould treatment. Line cut is in electric spark of 3 numerical control the applied circumstance in plastic pattern treatment 3.

Line cut is in electric spark of 1 numerical control movable mould and fixed die in machining medium application to be provided in plastic pattern, movable mould and fixed die the main component that is plastic mould. Movable mould also says model core or punch, it is to shape model inside mould spare parts of the surface, much outfit moves pattern plate to go up in what record model machine. Fixed die also say model antrum or sunken model, it is to shape model the mould spare parts of outside face, much outfit is on the calm pattern plate of the machine that note model. Movable mould and fixed die should handle through quenching normally, hardness is extremely tall, common treatment method is machined hard, especially alveolus and different aperture. The line cut application in movable mould treatment often has numerical control electric spark mold insert aperture, thimble aperture, department canister aperture, inclined top aperture the treatment that wait. In fixed die the application in treatment often has the mold insert aperture, treatment that sets pinhole to wait. See a picture one: Line cut is in numerical control electric spark the application in movable mould treatment; Graph 2: Line cut is in numerical control electric spark fixed die the application in treatment. Graph one: Line cut is in numerical control electric spark the application in movable mould treatment pursues 2: Line cut is in numerical control electric spark fixed die the application in treatment 3.

The line cut application in tool electrode treatment is in electric spark of 2 numerical control in plastic mould, especially movable mould, fixed die have a lot of tiny place cutting tool unfavorable treatment, or the face with more complex form, make tool electrode with respect to need at this moment, use electric spark processing. Tool electrode has fine abnormity painstakingly aperture, narrow seam and of sophisticated inclined plane model column, model aperture, cutting tool is unfavorable treatment, must use numerical control electric spark line cut machine tool has cut take shape. Because milling cutter always is existing radius R, in requirement sharp-angled mould, electrode often also should use numerical control electric spark line cut has clear part. Clear part treatment made full use of electrode silk R is small, the advantage with alterable big taper. If pursue 3: Line cut is in numerical control electric spark the application in tool electrode treatment. Graph 3: The line cut application in electrode treatment is in numerical control electric spark in the cut process of electrode, the scintilla that when be sure to keep in mind to want to consider electrode to shape, uses. General divide evenly has electrode of thick, essence two kinds, discharge scintilla it is unilateral about respectively 0.

15MM, 0.

05MM; Still need to be used in large work treatment thick in essence of life 3 electrode, discharge scintilla it is unilateral about respectively 0.

3MM, 0.

15MM, 0.

05MM. Machining Kong Shi, make good omissions the value should subtract unilateral puts electric spark, also be about to aperture is cut big bilateral two scintilla. If machine the aperture of a 10MM, be like scintilla for unilateral 0.

3MM, the dimension of the aperture after be being machined is 10.

6MM. When processing an external form, make good omissions the value also is to want scintilla of subtractive and unilateral discharge, also be about to electrode appearance is bilateral cut small two discharge scintilla. If machine the square column of a 10MM*10MM, be like scintilla for 0.

3MM, the dimension after be being machined is 9.

4MM*9.

4MM. 3.

Line cut is in electric spark of 3 numerical control line cut is in the electric spark of applied numerical control in spare parts treatment the application in spare parts treatment often has: Movable mould is fixed die aperture of mold insert, inclined top, slide block, pin, and a few wear-resisting board, pressing plate layering. If pursue 4: Line cut is in numerical control electric spark the application in spare parts treatment. Graph 4: Line cut is in numerical control electric spark the treatment of applied spare parts in spare parts treatment also often considers to cooperate clearance constantly, the regulation that takes a cost commonly is to will set aperture to cut big 0.

003 ～ 0.

005MM, and mold insert is machined according to normal data. Perhaps fall to magnify mold insert unilateral in the condition that does not know the size that set aperture 0.

003 ～ 0.

008MM, lest mold insert is too small,cannot use. When rake mold insert is machined, bottom coping puts long 1MM left and right sides commonly. Because can install mold insert very closely when assemble, do not leave a bit gap, spare part can use milling cutter or bank note annulus machines take out. 4.

Line cut is in numerical control electric spark method of a few kinds of in plastic pattern treatment special application 4.

Line cut is carrying electric spark of 1 numerical control on the head the applied method thimble in pinhole treatment is the spare parts of the simplest drawing of patterns in plastic pattern, standing plan is in the position with larger obstruction of drawing of patterns. Thimble aperture is passed for thimble namely arrive at the surface inside the product, the top gives the passageway of the product. If pursue 5: Line cut is carrying numerical control electric spark on the head the application in pinhole treatment. Graph 5: Line cut is carrying numerical control electric spark on the head the application in pinhole treatment is general aperture of the thimble in the mould is more, silk is worn in online cut frequent, reason contains the treatment of machine tool of silk of don't go yet that wears silk automatically aptly. Also choose the software that contains many process designing to have to program aptly on process designing software, if all of Taiwan amounts to software. This software can casing picks all thimble hole, need to set treatment parameter or requirement only, process form with respect to what can make all thimble hole automatically. Unlike has some of software, the alternative that needs an again and again to the treatment of thimble aperture carries pinhole on the head or treatment parameter reachs a condition. When the treatment of thimble aperture, the size of aperture of the first thimble often needs to undertake trying matching. If thimble of the last treatment still is put,do not go in to want to undertake 2 times weighing cutting. The the program the first knife when be being cut again is deleted, the 2nd knife makes good omissions the cost is fixed, the 3rd knife makes good omissions the value is added slightly. If can go in one smaller part, criterion divide evenly of the first knife, the 2nd knife is deleted, the 3rd knife makes good omissions the value is added slightly. This is the job that an experience accumulates, often want for many times to just can be obtained cooperate suitably to make good omissions value. 4.

Line cut is in electric spark of 2 numerical control the applied method in inclined treatment carrying aperture on the head is inclined also be 10 when plastic pattern middling sees very, it often appears in couples in both sides of movable mould left and right sides. Inclined top Kong Ye is the passageway that inclined top top gives. Inclined top aperture has rake commonly, and its rake is both sides is the same as inclined to, both sides is straight body, unlike common rake workpiece treatment. Be sure to keep in mind to want caution when process designing, what cent is clear about it is inclined to, notice the deflective code in examining pattern and deviant are being lost. If pursue 6: Line cut is in numerical control electric spark the applied method in inclined treatment carrying aperture on the head. Graph 6: Line cut is in numerical control electric spark the applied method in inclined treatment carrying aperture on the head is inclined the form example that carries aperture on the head is as follows: G54 G21 G90 G92 X0.

Y0.

T84 C101 H001 M98 P0001 T85 C102 H002 M98 P0002 C103 H003 M98 P0001 M02 N0001 G91 G42G52A0.

G01 X-1.

0167Y12.

5G52 A5.

X26.

0167G50 Y-25.

A0.

G51 X-50.

A5.

G50 Y25.

A0.

G52 X23.

9833A5.

G40 G50 X1.

0167Y-12.

5A0.

G90 M99 N0002 G91 G41 G01 G51A0 X-1.

0167Y12.

5X-23.

9833A5.

G50 Y-25.

A0.

G52 X50.

A5.

G50 Y25.

A0.

G51 X-26.

0167A5.

G40 G50 X1.

0167Y-12.

5A0.

G90 M99 notices the distinction of G51 and G52 in above form, and going as different as what walk along G51 and G52 instead back and forth in two stature programs. 4.

Line cut is in electric spark of 3 numerical control fluctuation abnormity the abnormity of applied method fluctuation in treatment is those who point to workpiece on end and lower end figure are different, as above end is a circle, the lower end is one square. If pursue 7: Line cut is in numerical control electric spark the applied method in fluctuation abnormity treatment. Graph 7: Line cut is in numerical control electric spark the form example of the abnormity of applied method fluctuation in fluctuation abnormity treatment is as follows: G54 G21 G90 G92 X0.

Y-31.

25U0.

V0.

T84 C101 H001 G142 G01 Y-25.

: G01 Y-18.

75X25.

: G03 X13.

2582Y-13.

2583J18.

75Y25.

: X13.

2583Y13.

2583I-13.

2582J13.

2583X-25.

: X-13.

2582I-13.

2583J-13.

2583Y-25.

: Y-13.

2583I13.

2582J-13.

2583X0.

: X0.

Y-18.

75I13.

2582J13.

2583Y-31.

25: G01 Y-31.

25G140 M02 in above form, with was being separated at 2 o'clock, the form in front is the appearance below is a square, the form from the back is the appearance above is a circle. It is a complex formula, it is to will go up to lay two pattern and go together, data walks along axis of X, Y below, the data above walks along axis of U, V. 4.

Line cut is in electric spark of 4 numerical control the applied method inclined guide pillar in treatment of aperture of inclined guide pillar is a spare parts in the slide block that smoke core, kong Ye of inclined guide pillar is guide pillar inclined to the channel that carry. Because be round hole, have one-way rake again, often be the difficult problem in line cut treatment. If pursue 8: Line cut is in numerical control electric spark the applied method in treatment of aperture of inclined guide pillar. Graph 8: Line cut is in numerical control electric spark aperture of inclined guide pillar machines the applied method in treatment of aperture of inclined guide pillar simply the method is to use auxiliary clamping apparatus to undertake complementary machining, use a foul line to touch number or treatment of the access that draw a line, this method machines reason precision is low not accurate, using software to analyse processing just is sounder treatment program. Be sure to keep in mind to want caution when process designing access, the form in it is an ellipse on the face, is not circle of a standard. Two elliptical fluctuation abnormity form are actually on its form. The form example of aperture of inclined guide pillar is as follows: G54 G21 G90 G92 X0.

Y0.

U0.

V0.

T84 C101 H001 G142 G01 X-5.

3557: G01 X4.

2409. . . . . . . . . . . . . . . . . . . . . . . . . . . X-5.

1994Y1.

1993I4.

6364J- .

7839: X4.

3972Y1.

1993I4.

6364J- .

7839X-5.

335Y- .

4391I4.

632J.

658: X4.

2616Y- .

4391I4.

6321J.

658X-5.

3506Y- .

2198I4.

6525J.

4394: X4.

2461Y- .

2198I4.

6525J.

4394X-5.

3557Y0.

I4.

6627J.

2198: X4.

2409Y0.

I4.

6627J.

2198G01 X0.

: G01 X0.

G140 M02 above the suspension points in form skipped on behalf of the province the form among. Because ellipse is Splines, and the controller of line cut machine can implement line and circular arc directive only, reason Splines is interrupted for circular arc, just cause the form above to have several 10 get on 100 even. If rake is bigger,be in in effective treatment, still must consider to compensate those who be worth Offset to change. Because the compensation cost on the program is,beg inside XY plane go out, the real compensation when be being machined with rake is worth existence error, because this returns need to consider this share,many compensation is worth, undertake correction to compensating a value actually. In be machined actually, because machine controller is different, afore-mentioned all sorts of form still must be made slightly through handiwork revise, ability application is produced at industry. 5 summary because this, numerical control electric spark the edge tool that line cut is plastic pattern treatment from beginning to end, apply extensively at movable mould, fixed die, electrode and spare parts. In special treatment circumstance, want to be able to weave only a right numerical control formula, line cut meets electric spark produce mainer and mainer effect in plastic pattern treatment surely. CNC Milling CNC Machining