HCD, cut of 5 molded lines is high frequency power source operation instruction handbook
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5A~5A 4, power outputs: 12 class 5, ply of the biggest cut: Efficiency of the ≥ 300mm 6, biggest treatment: Voltage of ≥ 100mm2/min 7, power source: Communicate 220 ± 1Hz of ± of 10 ％ V 50 3. HCD of principle of job of high frequency power source, 5 model high frequency power source by time base oscillating circuit, arteries and veins wide adjustment circuit, interval adjustment circuit, result is put drive circuit, power enlarge circuit and power source to wait form. Time base oscillating circuit allows circuit to form by the block of 555 integrated circuit and periphery, the stable width that adjusts block to allow circuit to be able to get high accuracy namely and removed rectangular pulse, after the buy before classics magnifies, drive VMOS power is in charge of output to process signal. Arteries and veins is wide adjust circuit by a double knife the 5 block that cast switch chooses to differ are worth, adjusting range is 8~80 μ S; Interval adjustment circuit by 4.
7K potentiometer and resistor block value are certain, adjusting range is 1~10 the arteries and veins of times is wide; Power magnifies circuit uses pipe of effect of 2 VMOS field, 5 switch add resistance, 12 combination choose the job. 4. Face plate of high frequency power source explains (slightly) 5. Line cut machines electric spark of use method of high frequency power source is to use electric spark discharge to produce electric corrode phenomenon to realize treatment to conductor, it is the result that collaboration of put together of motivation of report, heat and fluid uses. In scintilla discharge process, pulse voltage is the requirement that produces electric spark discharge, and a high-power that high frequency power source produces pulse tension namely is high frequency pulse signal source, it is component of one of machine tool of cut of numerical control line important composition, in use should learn to adjust correctly each parameter. (one) , adjust principle 1, workpiece height is controlled for 50mm, molybdenum silk diameter is in 0.
When 16mm, when cut is machined, general buy " voltage is adjusted " knob 2 archives, "Pulse extent " switch puts through 1+2+2 class, "Wide selection of arteries and veins " knob 3 archives, "Removed fine tuning " among knob the position, stability of cut electric current is in 2.
0A is controlled (detailed of different height workpiece sees " cut parameter chooses to express " ) . 2, feed speed (by controller make choice of) make choice of: After affirmatory voltage, extent, arteries and veins is wide, removed, use the method of factitious short circuit first, determine short-circuit current, begin cut next, adjust the frequency conversion archives of controller and dog knob, the 70~75% that makes machine electric current to achieve short-circuit current is optimal. 3, man-hour is added in cut, the switch of each condition is in as far as possible filar canister inverting or close high frequency when undertake, and not odd second adjust position substantially, lest fracture of wire. 4, when changing molybdenum silk newly to just began cut, machine electric current to choose regular cut electric current 1/3 to 2/3, classics 10 come minute of cut hind, move to normal value, use time in order to lengthen molybdenum silk. (2) , short-circuit current checks place " voltage is adjusted " knob 2 archives, "Pulse extent " switch puts through 1+2+2, "Wide selection of arteries and veins " knob 3 archives, "Removed fine tuning " among knob the position, with wider lead short circuit high frequency output is carried (on line arm front relies on to go up a wolfram steel of guide pulley is negative pole of high frequency output, the edge on workbench is anode of high frequency output) , open high frequency power source, open filar canister electric machinery, open controller switch of high frequency control, right now directive of watch of high frequency source current is about 2.
8A (3) the choice of each parameter 1. The selection operation method of working voltage: Rotate " voltage is adjusted " knob, can choose the treatment voltage of 70~110V, cent is 3 archives, volmeter indicated value is worth to machine voltage namely. Choice principle explains: Height is in the workpiece under 50mm, treatment voltage chooses to be in 70V, namely first gear; Height is in the workpiece of 50mm~150mm, treatment voltage chooses to be in 90V, namely second gear; Height is in the workpiece of 150mm above, treatment voltage chooses to be in 110V, namely the 3rd archives. 2. The choice of working electric current is changed " pulse extent " switch and adjust " wide selection of arteries and veins " and " removed fine tuning " knob can change working electric current, the choice of the working electric current that points to here points to the adjustment of switch of change pulse extent namely. Operation method: Change " pulse extent " of 5 switch open position, the power that can have 12 level is outputted, can agile ground adjusts output electric current, assure to ask to issue needs average treatment electricity in all sorts of different technology. If 2 mark have the switch of 2 to put through, be equal to a mark to the switch that 1 have 3 with mark puts through; Other kind with. Choice principle explains: "Pulse extent " switch puts through progression is more (be equivalent to result the number that put a valve is chosen morer) , treatment electric current is bigger, treatment rate is a few rapidder also, but fall in same pulse width, treatment electric current is bigger, exterior surface roughness is poorer also. Usually: Height is in the workpiece under 50mm, pulse extent switch puts through progression is in 1~5 class, like 1, 2, 3 or 1+2, 1+3 or 2+2, 1+2+2 or 2+3. Height is in the workpiece of 50mm~150mm, pulse extent switch puts through progression is in 3~9 class, be like 3 or 1+2, 2+2 or 3+1, 2+3 or 1+2+2, 3+3, 2+2+3 or 3+3+1, 3+3+2 or 3+2+2+1. Height is in the workpiece of 150mm~300mm, pulse extent switch puts through progression is in 6~11 class, be like 3+3, 2+2+3 or 3+3+1, 3+3+2 or 3+2+2+1, 3+3+2+1, 3+3+2+2, 3+3+2+2+1. 3. The selection operation method of pulse width: Rotate " wide selection of arteries and veins " knob, can choose width of pulse of S of μ of 8 μ S~80, cent archives, it is 8 μ S for 1 archives respectively, second gear is 20 μ S, 3 archives are 40 μ S, 4 archives are 60 μ S, 5 archives choose principle specification for 80 μ S: When pulse width is wide, discharge time is long, the energy of individual pulse is big, treatment is stable, cut efficiency is tall, but exterior surface roughness is poorer. Conversely, when pulse width is narrow, the energy of individual pulse is small, treatment stability is poorer, cut efficiency is low, but exterior surface roughness is better. Usually: Height is in the workpiece under 15mm, pulse width chooses 1~5 archives; Height is in the workpiece of 15mm~50mm, pulse width chooses 2~5 archives; Height is in the workpiece of 50mm above, pulse width chooses 3~5 archives. 4. Pulse chooses operation method removedly: Rotate " removed fine tuning " knob, adjust the size of pulse interval width, suitable hour hand rotates removed width greatens, anticlockwise rotate removed width decrescent. Choice principle explains: When treatment workpiece height is taller, increase pulse interval appropriately, discharge bits with benefit, of the electric corrode contamination that reduces cut point generate, make treatment stabler, prevent fracture of wire. Because be in wide archives of arteries and veins below affirmatory circumstance, interval is in " removed fine tuning " knob falls certainly, removed width is certain, should adjust so removed size rotates namely " removed fine tuning " knob. Below the case that has directive of stable and high frequency electric current, rotate " removed fine tuning " when knob, voltaic decrescent states interval greatens, electric current greatens express removed decrescent. (4) cut parameter is expressed (offer reference only) workpiece ply (Mm) machines voltage (V) electrical engineering electric current (wide archives of A) arteries and veins (archives) removed fine tuning (the position) pulse extent (class) ≤ 15 70 0.
8--1.
8 1- - 5 among 315, 50 70 0.
8--2.
0 2, 5 among 550, 99 90 1.
2--2.
2 3, 5 among 7100, 150 90 1.
2--2.
4 3, 5 interval greaten 9150- - 200 110 1.
8--2.
8 3, 5 interval greaten 9200, 250 110 1.
8--2.
8 3, 5 interval greaten 9250, 300 110 1.
8--2.
8 3, 5 interval greaten 11 6, common breakdown analyses high frequency power source (one) phenomenon: Fuse is broken. Reason: Power magnifies the bridge-type commutate of the rectification power source of circuit piles puncture, short circuit. (2) phenomenon: Power source directive is normal, without high frequency electric current. Reason: 1, output line open a way; 2, open a way of interior of high frequency ammeter; 3, control loop breakdown: SQ3 of switch of ① inverting journey often shuts contact to be illogical, ② machine tool is high frequency the line wraps relay or contact is illogical, ③ controller does not have 12V output. 4, oscillating circuit breakdown: ① oscillation board without 12V power source, ② NE555 IC attaint, ③ arteries and veins is wide damage with interval adjustment switch. (3) phenomenon: Power source directive is normal, high frequency short-circuit current is unusual slant big. Reason: 1, NE555 IC attaint; 2, VMOS power provides breakdown; 3, arteries and veins is wide damage with interval adjustment switch. CNC Milling