Of CNC scintilla machine jolty with precision
- source:JUSTYN CNC Machining
Want to use scintilla machine, it is the mainest function joltily, jolty to decreasing handling time is mixed getting good appearance is very effective.
Not be every client however what use jolty function is very good.
Main reason is the architect does not want to use enough electrode to reduce inch of amount, they are afraid too congress reduces precision.
If we are decreased to electrode,very little quantity is mixed joltily enough understanding can use proper electrode to reduce inch of amount, improve treatment efficiency.
1 electrode reduces inch of amount 1.
The meaning discharge that 1 electrode reduces inch of amount produces scintilla gap between cathode and positive pole.
Because of this reason, the form that electrode must want to be machined than wanting is small.
Reduced numerical value is called electrode to reduce inch of amount.
Electrode reduces inch of amount general with every edge decrease show.
Electrode decreases inch of quantity to be in the graph with " R " dimension of indication R=(antrum - electrode dimension) ÷ 2 Fig 1.
Electrode reduces inch of amount 1.
2 electrode decreased inch of quantity to decide to machine speed.
If electrode discharge amount is large, gap will be big; conversely contrary.
Imagine easily, if the energy when treatment is big, so treatment speed also is met fast.
According to big toe law, if electrode reduces inch of amount double, treatment speed (scrap purify is led) can raise 5 times.
Additional and important is rough machining condition not only speed fast and loss is small.
If if electrode is decreased,that also explains inch of capacity is sufficient, you can use the condition of effective and small loss.
How to get good exterior quality.
The exterior quality of rough machining is very poor, but we hope to get good exterior quality inside short time again.
The best method that should achieve this one goal uses rough machining condition to machine much namely, next condition of reoccupy finish machining goes machining the surface.
Additional, want to reduce handling time, treatment condition is about to change in appropriate time.
For example, if you begin the biggest surface roughness of rough machining,be 40 μ , and you should get the biggest surface roughness finally is 5 μ , so you must have 7 paragraphs to change treatment condition between rough machining and finish machining.
(To material of every kinds of workpiece, electrode material and treatment area, the model data that machine tool of series of Mu Ye EDNC has a level) 2.
Surface of bottom of 1 bottom surface can pass change condition and setting height to come true.
But flank because of rough machining of clearance comparing finish machining should big and cannot come true 2.
Flank of 2 jolty implementation is machined.
Want to machine flank, electrode must want to be close to flank to be in perpendicular the motion within the plane of treatment direction is called jolty and jolty purpose is treatment of the lateral that finish 3.
Jolty (2 dimension) the influence to precision 3.
1 jolty the appearance after above all the appearance after we should know jolty treatment.
If electrode with proper form jolty, the each part of electrode wants with same figure jolty (Fig 6) .
Draw the appearance written complaint of an electrode next.
The outside figure of this graph is the appearance after finish machining (Fig 7) .
This method can be used in random on a kind of jolty appearance.
This is a kind of effective method that processes form certainly.
A little jolty meeting causes imprecise appearance, but from general consideration, the mistake is not very big. We should have enough understanding to just go to these, I want to begin from two-dimensional appearance. 3, electrode of 2 circles translation compares the form that wants actually to want in the metropolis on every dimension a bit smaller (Fig 8) . So good is about to enlarge the dimension of a R on each direction to wanted appearance measure. A R expands to be equivalent to every nodding the circle that makes R to move on each direction. Fig 9 showed linear part is correct, but pointed part part is insufficient however. The radius of treatment is R, be equal to electrode to reduce inch of amount. To average figure, be like graph Fig 11, electrode decreases inch of quantity to make quoin radius small, and radius of an internal angle is big. This kind is out of shape just like " Offset Machining " (Fig 12) is same. After use circle translation, treatment figure is correct (Fig 13) . If use CNC or line cut to make electrode and will decide electrode reduces inch of amount with deflection, circular translation make correct appearance, without pointed horn. Additional and important is: Circular translation was not cut too. This is translation means of the standard, did not cut too. If you are not to understand translation very much, so the proposal chooses this translation way. 3.
3 travel translation to EDM, corner treatment is one of the most serious treatment. If pursue Fig 14, quadrate translation is better than circular translation. Show a figure to Fig 15 place (already round and square) , you must choose the radius of the corner and final radius to agree. This is the best means that uses quadrate translation. Fig 14 and Fig 15 are decided by corner line place, but if you also use quadrate translation to average figure,can appear problem. For example, if to Fig 16, you use quadrate translation, so diagonal area can be cut too. Graph Fig 17 showed an account. The most apparent mistake is 45 degrees of horn when. This are jolty the form can be used in only show figure like Fig 18 place. Right now, the treatment efficiency that quadrate translation compares circular translation wants a few taller. 3.
4 free translation about the triangle (Fig 16) , if you use circular translation, the dimension of bevel edge is correct. But see these role, have the share that machines. In right now you can use free translation. If jolty radius is a triangle, horn can be machined. MAKINO EDNC series has the function of free translation. Very simple. The program asks merely the appearance of electrode appearance. The example of program and result shows like Fig 20 place: Show figure about Fig 21 place, use free translation impossibly. After circular translation, what if you think,make pointed part part is more pointed, other part can be cut too. To these appearance, circular translation is more appropriate. 4 be opposite joltily the influence of precision (of 3 Dimension) 3D can consult to the influence of dimension joltily 2D to X - Y planar Y - Z or Z - X is planar. Because the electrode of 3D appearance has the reason of same R in each direction, want to be put in the proper place of final figure. To this position when, you must use the R that place of condition of electrode roughcast discharge allows. Change the treatment condition of finish machining next. 5.
1 bottom and simple appearance to average CNC EDM machine, jolty value is from the top down is changeless (this method is called " bottom and simple appearance " ) . If X-Y plane is circular translation, z-X or Y-Z plane and quadrate translation are same. What this means bottom radius and bottom rake is same (Cf.
Fig 15) . Normally, because of the treatment deflection reason of R, bottom radius and rake are met decrescent. If you use the electrode of bottom and simple appearance, bottom pointed horn can be cut too. The numerical value that cuts too should decide according to the scale of electrode R. Because of this reason, rough machining has appeared easily to cut. To the electrode of 3D, if you want to use the pattern of bottom and simple appearance, must agree of the bottom horn radius of your electrode and rake with final appearance phase so. 5.
The figure that 2 bottom and complex form show just like the Fig 24 that be like a graph is same, you decide some electrode very hard its bottom radius, or sometimes electrode bottom is not flat whole. These electrode resemble what above place mentions impossibly to be done in that way. Machine of MAKINO EDNC set has " bottom and complex form " mode will solve this one problem. Typical pattern is: Bottom and complex form. This is in flank (X of Z ― or plane of Y ― Z) looking is the translation with the circle is same. Had done not have cut area. If use big electrode, this means to rough machining also be applicable. Fig 23 place is shown had cut too. Fig 26 showed the result of means and treatment. If use " bottom and complex form " , approve the result that achieves Fig 24 with coming with the electrode of Fig 23 truly please. 5.
3 bottom and sophisticated treatment 5.
The method of 3 bottom and sophisticated treatment to different underside figure, machine tool of Makino EDNC series has a lot of planting to machine a method. 5.
3 new-style and spherical jolty treatment (machine a method 8) generally speaking, we recommend the following method: Rough machining uses complex form underside and finish machining uses simple underside figure. However, to three-dimensional electrode, because the electrode of 3 direction is used up at the same time, afore-mentioned methods as much applicable, to finish machining, the underside of complex form gets taller precision not easily. (102 Z**R**E**I**J**O**L23P1111M0B0 to such appearance, we rolled out new treatment way 8, 18, treatment of flank of 28 G102Z**R**E**I**J**O**L28P1111M0B0 (is not applicable) the treatment that accumulates to bedding face, especially HQSF treatment, we recommend this to machine a method. This process is columnar motion not only and the motion that also is 3D appearance, following place show: To reduce handling time, the machine decided the examination when the end is nodded, affirm to after treatment ends, had been met at this o'clock when the machine turn to below one paragraph to machine. 5.
5 complex actually the appearance of the product has a factor in bottom. Especially the appearance of profit margin part (the appearance that does not have level off) get correct figure very hard. If angle is very sharp, difference is bigger. It can increase on R value. The electrode with bottom complex form cannot get correct figure because of what Fig 21 shows an account. Very tall to precision figure or sharp-angled are designed, r value is not OK very big, if possible sentence, the setting is 0. Popularly, we install R value to be less than 0.
1 and jolty radius setting is very small. The problem is the time problem of finish machining block. Want to reduce this paragraphs handling time, roughcast electrode is about to choose the mode with bottom complex and round figure, rough machining must be accomplished and energy workshop section. 6.
The R with conclusion appropriate ① can reduce handling time.
② basically, jolty R value should choose a circle, because it is on each direction,be same R value. Because ③ is jolty and the share that the not accurate meeting that cause amasses in horn, and with R the value matters. But circular translation is the safest.
④ checks electrode figure before choosing jolty way please.
⑤ can be in joltily pointed horn and bevel edge part had been caused cut.
If ⑥ can compensate the word of these area that cut too, quadrate and jolty efficiency is taller.
⑦ is in X-Z, the measure that bottom and simple appearance makes Y-Z plane and square are in joltily of X-Y plane is same. Bottom is complex and globose in each direction it is circular translation. Reason is in 3 dimension are safety. ⑧ to rough machining, use the jolty means with bottom complex form please.
Below the sort of circumstance, you can be used enough great R value.
⑨ generally speaking, bottom appearance is simple OK, because R value is very little.
⑩ but in cent face, this kind of not accurate meeting is caused coordinate time longer wait for a problem.
Basically be to choose lesser R to be worth only right now.