Aperture machines fixed loop

The motion that aperture machines fixed loop and movement are right when workpiece aperture is machined, can divide according to the athletic position of cutting tool for 4 plane (like the graph 1 shows) : Initiative plane, R plane, workpiece plane and hole bottom are flat. In aperture treatment process, the motion of cutting tool comprises by 6 movements: Graph the planar movement that 1 aperture treatment circulates 1, fast fixed position showed initiative drop to initiative dot X, Y the position in initiative plane; Movement 2, fast fixed position chooses cutting tool to R from initiative dot fast feed is nodded to R; Movement 3, the movement that Kong Jia is versed in the means with cutting feed carries out Kong Jia to be versed in; Movement 4, time-out, main shaft includes to stop definitely in the corresponding movement of hole bottom, the movement such as cutting tool shift; Movement 5, return R dot to continue cutting tool of Kong Jia man-hour returns R to order plane; Movement 6, initiative dot plane is returned after returning the initiative treatment that burn hole to finish quickly. Add the treatment quality of labour to assure aperture, some aperture treatment secure a loop to dictate need main shaft allows to stop, cutting tool shift. Graph the motion of the 2 cutting tool in expressing to machine fixed loop in aperture and movement, the dotted line in the graph expresses fast feed, solid line expresses cutting feed. Graph the movement of 2 fixed loops (1) initiative plane is initiative and planar the plane of the fixed position cutting tool that is for safe operation set. The initiative plane distance to spare parts surface is OK and aleatoric set. If use same machine cutting tool a certain number of aperture, when when Kong Jian existence obstacle needs leap or entire hole treatment is finished, with G98 the instruction makes cutting tool returns initiative and planar; otherwise, usable G99 instruction makes cutting tool returns R to order plane in inter treatment process, can shorten so treatment assists time. (2)R nods planar R to nod plane to call R referenced plane again. This plane represents the turn position that cutting tool turns to be entered for labour from speed, r nods plane to be apart from the distance of workpiece surface to basically consider the change of workpiece face figure, general and desirable 2-5mm. (Z of plane of 3) hole bottom represents the position of hole bottom plane, the cutting tool when machining via extends plane of workpiece hole bottom a paragraph of distance, make sure via is machined entirely reach the designated position, broach of Lv of the take an examination when drilling the hole that cut blind gets the needle effect to hole depth. 2.

Plane of choice treatment plane and treatment of choice of aperture treatment axes has G17, G18 and G19 3 instructions, corresponding XOY, XOZ and YOZ3 treatment is planar, and axes of corresponding aperture treatment is Z axis, Y axis and X axis respectively. When aperture of vertical CNC Milling is machined, can use Z axis to machine axes as aperture inside XOY plane only, with planar choice the instruction has nothing to do. Kong Jia of CNC Milling of main discussion vertical is versed in fixed loop dictates below. 3.

Aperture treatment secures form of statement of circular statement form: G: of function of instruction of G89 X__ Y__ Z__ R__ Q__ P__ F__ L__ of ～ of G89 X__ Y__ Z__ R__ Q__ P__ F__ L__G91 G98 G73 of ～ of G89 X__ Y__ Z__ R__ Q__ P__ F__ L__G91 G99 G73 of ～ of G89 X__ Y__ Z__ R__ Q__ P__ F__ L__G90 G98 G73 of ～ of 90 G99 G73?  of ㄑ of pool of accurate commonplace す divides Ga bracelet to get?(1) to be in G90 or G91 instruction, z coordinate value has different definition. (2) G98, G99 chooses to dictate for reentry point plane, g98 instruction states cutting tool returns initiative dot plane, g99 instruction states cutting tool returns R to order plane, if the graph is shown 2 times; (3) Kong Jia is versed in G89 of means G73 ～ dictates, kong Jia is versed in means correspondence instruction sees next tables; (4)X__ Y__ appoints the position that machines aperture, (concern with G90 or the choice that G91 dictates) ; The position that Z__ appoints hole bottom plane (concern with G90 or the choice that G91 dictates) ; The position that R__ appoints R to order plane (concern with G90 or the choice that G91 dictates) ; Q__ is defined in G73 or G83 instruction every time feed machines deepness, displacement quantity is defined in G76 or G87 instruction, q value is increment size, have nothing to do with G90 or the choice that G91 dictates; P__ appoints cutting tool to be in the suspensive time of hole bottom, express with integer, the unit is Ms; F__ appoints aperture to machine cutting feed speed. This instruction is mode instruction, although cancelled to secure a loop, in ever since effective still;L__ appoints what Kong Jia is versed in to repeat treatment time in machine program, carry out L1 to be able to omit. If the program is chosen,G90 dictates, cutting tool repeated treatment of aperture locally before, if choose G91 statement, use cloth of bisect of a block to go up point-blank in a certain number of equidistant aperture undertakes machining. L instruction is in only the Cheng that is appointed paragraph in effective. If fixed loop function pursues institute of 3 different pictures is shown, choose statement of G90 of absolutely coordinate means, z shows the distance of hole bottom plane relative to coordinate origin, r states R nods the distance of origin of planar and opposite coordinate; If pursue,institute of 3 right plans is shown, choose statement of G91 of opposite coordinate means, r states initiative dot plane nods planar distance to R, z states R nods plane to be apart from planarly to hole bottom. The instruction such as the Z in statement of aperture treatment fashion and instruction, R, Q, P is mode instruction. The coordinate of graph 3 G90 and G91 is calculated 4.

All sorts of aperture treatment means explain (bits of platoon of move back and forth of deep aperture of 1) high speed gets form of G73 statement statement: If movement of treatment of aperture of G73 X_ Y_ Z_ R_ Q_ F_ pursues institute of 4 different pictures is shown. G73 instruction is used at deep Kong Zuan to cut, the discontinuous feed of Z axis direction is helpful for deep Kong Jia be versed in the process interrupts bits and platoon bits. The treatment deepness that dictates Q is every time feed (increment size and to be worth) , the knife is retreated to be apart from D in graphic representation by set of interior of numerical control system. (Move back and forth of 2) deep aperture discharges bits to get form of G83 statement statement: If movement of treatment of aperture of G83 X_ Y_ Z_ R_ Q_ F_ pursues institute of 4 right plans is shown. What with G73 the instruction differs somewhat is answer after feed of cutting tool intermittence every time retreat order plane to R, bits of platoon of this kind of means that retreat a knife is expedite, the distance between the dot that dropped what the D of here states when discontinuous feed drops every time, cutting tool turns to be entered for labour by speed to feed of before one cutting that, d is worth by set of interior of numerical control system. This shows is gotten this kind cut means to machine deep aperture aptly. Loop of graph 4 G73 and G83 loop (3) essence bores hole form of G76 statement statement: If the graph is shown 5 times,aperture of G76 X_ Y_ Z_ R_ Q_ F_; machines a movement. The OSS in the graph states main shaft allows to stop, q states cutting tool shift is measured (the regulation is be worth, if was used,bear value criterion negative sign by oversight) . In hole bottom main shaft directional after stopping, the deflection that knife head appoints by address Q place measures shift, carry a sword next, the deflection quantity of knife head is in G76 instruction set. Use this kind to bore hole means is OK high accuracy, efficient the ground finishs Kong Jia to be versed in and do not mar workpiece appearance. Graph 5 essence bore hole graph (the statement form of instruction of 4) bore G81 and G81 of instruction of Huo aperture G82 is: The statement form of G81 X_ Y_ Z_ R_ F_;G82 is: G82 X_ Y_ Z_ R_ F_; pursues 6 bore and Huo Kong Rutu are shown 6 times, g82 and G81 instruction photograph are compared, the place that differs exclusively is G82 instruction increased time-out in hole bottom, apply to Huo aperture or aperture of boring a flight of stairs consequently, improved the treatment quality of surface of opening chance to extricateoneself from an awkward position, and the drill that G81 instruction uses at general requirement only. (5) essence bores hole the statement form of G85 instruction and G85 of instruction of G89 of aperture of a flight of stairs of boring of essence of life is: The statement form of G85 X_ Y_ Z_ R_ F_;G89 is: G89 X_ Y_ Z_ R_ P_ F_; is shown 7 times like the graph, these two kinds of aperture machine means, cutting tool machines hole bottom with the means of cutting feed, return R to order plane with the means of cutting feed again next, because this applies to essence of life to bore hole,wait for a circumstance, g89 instruction increased time-out in hole bottom, improved the treatment quality of surface of chance to extricateoneself from an awkward position of opening of a flight of stairs. Graph 7 essence bore hole with aperture of a flight of stairs of boring of essence of life (6) bores hole form of G86 statement statement: G86 X_ Y_ Z_ R_ F_ is shown 8 times like the graph, the main shaft after machining hole bottom stops, after returning initiative plane or R dot plane, main shaft is started afresh again. Use this kind of means, if the aperture span of successive treatment is lesser, likelihood occurrence cutting tool has located increase the position of labour to next aperture and main shaft has not reach appointed rotate speed, it is this to be able to add suspensive G04 statement between each aperture movement, make main shaft gains designation rotate speed. Graph 8 bore hole G86 dictates (7) bores hole instead form of G87 statement statement: G87 X_ Y_ Z_ R_ Q_ F_; is shown 9 times like the graph, after X axis and Y axis locate, main shaft stops, cutting tool measures deflection by the deflection of instruction Q set with as opposite as point of a knife way, fast fixed position arrives hole bottom, by former deflection in this position cutting tool the quantity is returned, next main shaft is turning, edge Z axis is being nodded to Z to treatment, after here positional main shaft stops again, cutting tool measures retrorse displacement by former deflection again, next main shaft moves quickly up arrive at initiative plane, the main shaft after be being returned by former deflection quantity is turning, continue to carry out next block. Use means of this kind of loop, cutting tool can return initiative plane only and cannot return R to order plane. Graph 9 bore hole instead (8) bores hole form of G88 statement statement: G88 X_ Y_ Z_ R_ P_ F_; is shown 10 times like the graph, cutting tool arrives at the time-out after hole bottom, the main shaft after time-out ends stops and the system enters feed to hold position, the hand can be carried out move an operation below this circumstance, but for safety, answer to exit cutting tool from Kong Zhong first, restart treatment is started by the loop by button, cutting tool returns R to order plane or initiative dot plane quickly, next main shaft is turning. Graph 10 bore hole G88 dictates (9) repeats fixed loop to use example simply: Auger if pursue,cut 11 medium hind 4 aperture, work out machine program. When G90 G00 X20 Y10G91 G98 G81 X10 Y5 Z-20 R-5 L4 F80 should machine a lot of same hole, should the distributinging rule of anatomize aperture, reasonable use repeat fixed loop, simplify as far as possible process designing. Each aperture is pressed in this exemple wait for span linear to distributing, can use repeat fixed loop treatment, repeat a time with address L regulation namely. Use process designing of this kind of means, before entering fixed loop, cutting tool cannot locate directly the position in the first aperture, and the position that should use an opening to reach. When because be being carried out,securing a loop, cutting tool should carry out bore movement again after fixed position first. Graph 11 repeat fixed loop to apply simply CNC Milling CNC Machining