The CNC Machining of spare parts of concave and convex chamfer

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The article is aimed at spare parts of the V in mechanical equipment concave and convex chamfer to be machined harder on common lathe, the precision difficult control of angle. Apply extensively in mechanical manufacturing industry as numerical control lathe, if this kind of spare parts is in numerical control lathe (Wuhan China is mediaeval system of astral numerical control) go up the result that process designing treatment can achieve get twice the result with half the effort. Use common lathe to machine horny annulus this kind of mechanical part that has point of view is commonly used have two kinds of methods: One kind is to become when the conic angle with shorter turning, it is to use method of rotational small slide commonly, turn small slide when turning conic half horn A/2, the conic element line that makes the athletic contrail of lathe tool and place want turning is parallel can, when wanting to notice rotational small slide at the same time, must turn alertly way is right. Another kind is to use shape the knife machines a law. The defect that these two kinds of methods exist is: Because accept the journey restriction of small slide, when can adding section chief to spend shorter conic; turning only hotshot moves feed, surface roughness of surface of labor intensity big; controls; to use hard shape law lathe should have good tigidity, cause vibration easily otherwise, apply to turning only shorter outside efficiency of conic; production is low. So lathe work master machines efficiency because of its low do not wish to machine this kind of spare parts, especially groove kind spare parts more do not wish to machine. As the flying development of science and technology, because numerical control lathe is had efficient､ high accuracy&The characteristic of #65380; and Gao Rou sex, increasingly wide application receives in mechanical manufacturing industry, already made one of numerical control machine tools with the at present widest application. The effect this locality that afore-mentioned spare partses can achieve get twice the result with half the effort in treatment of the process designing on numerical control lathe is Shicai production base, a lot of produce the bridge to cut the stone timber machinery plant of machine, the bridge is cut there are a lot of guides on machine horny annulus is to attribute protruding groove part, if pursue 1, the graph is shown 3 times, because manufacturer majority is bed of the be open to traffic that use general,machine these spare partses, manufacturer knows this school know exactly about sth accuses lathe to ask to help its machine these spare partses. One, protruding chamfer horn annulus 　 of CNC Machining 　 1.

If the graph is shown 1 times,the craft of part drawing and difficulty are analysed, this spare parts includes inside&Face of the cylinder outside #65380; , end panel, included angle is the treatment of two cone of 110 ° . Difficulty depends on two cone be being machined harder, stand by the cone that 3 ungual chuck are in especially, cutting tool should be used left slant knife, workpiece coordinate fastens set to have certain difficulty. Graph horn of 1 protruding chamfer annulus part drawing 　 2.

Treatment program is in understanding to be Φ to semifinished product from manufacturer surely really the 45# round steel of 120 × 56mm, their treatment method in common lathe is a car give one aspect of the matter to hold clip hind treatment comes out, turn around again an outfit clip cut with end panel knife. We have two kinds of plan certainly through discussing. Plan one: With solder the method that refute long work goes machining. Considering this school 60mm of a batch of Φ abandons old round steel tube and this school to just had class of exercitation of two textual research, to reduce the cost of material of manufacturer, our requirement manufacturer can reduce 50mm to ask the student is when solderer solid example again by 56mm it is solder of long 60mm steel tube on the work center that already machined good end panel (want weld) , with 3 claw chuck installs clip to solder when treatment steel tube can be machined come out, the tune after treatment is over machines another end panel to dimension. So OK one content is multi-purpose. Plan 2: Use arbor clamping apparatus to install the method of clip to machine. We ask the experienced worker of the factory to coach on the spot to school workshop, they ask a numerical control lathe is new corrective level, and each datum plane with 3 ungual card 3 ungual chuck use lathe tool new precision work. Adopting the method that holds clip with arbor clamping apparatus is with two number the car divides a working procedure to undertake machining, use the aperture inside a treatment that count a car and length to dimension first namely, outfit of workpiece of another several handlebar places reoccupy in the graph aperture of the less than on 2 shown arbor clamping apparatus is fixed position fiducial undertake machining. The course is comparative, the qualitative check of workpiece classics manufacturer that treatment of the 2nd plan gives can be achieved form tolerancepublic errand requirement. Its biggest advantage is: Can decrease to improve efficiency to knife frequency; (every part handling time can save 20 minutes) ; saves spare parts cost of material. Adopt plan so 2 undertake machining. Graph 2 arbor clamping apparatus counts a car to divide a working procedure to undertake machining with two. (The ◎ of treatment program 　 that 1) counts a car the first times clips workpiece directly, the circle outside machining ◎ of 　 of 　 of end panel; to change 2 extras round knife to machine with knife of an end panel comes Φ 118mm, length is 30mm, the tune of ◎ of 　 of via; 　 that the ◎ of 　 of fiducial; 　 after serving as tune gets Φ 35mm with broach is installed place face of the circle outside already was being machined, search, change knife of an end panel to machine end panel to be ◎ of 46mm; 　 　 to change ◎ of 　 of 　 of; of dimension of the Kong Zhi inside treatment of knife of the 3 aperture inside date to check to length, school nucleus. (The ◎ of treatment program 　 that 2) counts a car the 2nd times already had machined inside the workpiece outfit clip of aperture is on arbor clamping apparatus and locking, change 1 right slant ◎ of 　 of 　 of; of share of right of knife treatment spare parts changes 2 left slant the knife machines left part. ◎ examination, school nucleus. 3.

Numeric computation 　 (origin of 1) set program is program origin to build workpiece coordinate with the node of workpiece right end panel and axes is. Attention: Because 2 knives are,become, after right to workpiece is being touched with left point of a knife when the knife end panel, slant in the knife those who express 2 knives try cut length pen point to set 8mm) of Z=8(Dao Kuan, namely the system is a knife with right point of a knife dot. (2) is calculated A(88 of 　 of value of coordinate of each node position.

79, 0) , b(114, – 18) , c(114, – 28) , d(88.

79, – 46) . 4.

Machine program expresses 1 program to block Normal > numerical control blocks Normal MARGIN of origin of Center" Align=center> process designing: 0cm 0cm 0pt; TEXT-ALIGN: The nodical Normal Align=center> workpiece and axes: 0cm 0cm 0pt"> writes date Normal >normal >normal MARGIN of name of Center" Align=center> spare parts: 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center> horn annulus Normal MARGIN of part drawing date of 0cm 0cm 0pt"> : 0cm 0cm 0pt; TEXT-ALIGN: 2normal Align=center> graph: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> material: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center>45# round steel: 0cm 0cm 0pt">normal MARGIN of model of Center" Align=center> lathe: 0cm 0cm 0pt">normal > places sign one's name to weigh Normal MARGIN of clamping apparatus of Center" Align=center> arbor: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> solid example: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> numerical control: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> program: 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center>%0088normal MARGIN of system of process designing of 0cm 0cm 0pt"> : 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center> China Normal MARGIN of Center" Align=center> serial number: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> program: 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center> shows Normal Align=center>N1normal >T0101normal > chooses Normal Align=center>N2normal >M3S500normal > is turning, rotate speed is 500r/minnormal Align=center>N3normal >G0150Z100normal > builds workpiece coordinate to fasten Normal Align=center>N4normal >X122Z2normal > approachs work quickly around Normal Align=center>N5normal >G71U2R0.

5P6Q9X0.

5Z0F150normal > , every time cutting deepness U: 2mm(radius is worth) , retreat a knife to measure R every time: 0.

5, surplus of X direction finish machining 0.

5mm (the diameter is worth) Normal > begins the 6th paragraph for finish machining paragraph, the 9th paragraph ends paragraph of Normal Align=center>N6normal >G01X88.

79F100normal > initiative paragraph, normal > with the feed speed of 100mm/min linear cutting nods X coordinate Normal Align=center>N7normal >Z0normal > is linear cutting nods Z coordinate Normal Align=center>N8normal MARGIN of – of 0cm 0cm 0pt">X114Z: Cutting tool of 0cm 0cm 0pt"> is linear cutting nods Normal Align=center>N9normal MARGIN of – of 0cm 0cm 0pt">Z: The end of outline of finish machining of 0cm 0cm 0pt"> paragraph, normal > 47 length of Z – are in Normal Align=center>N10normal >G00150Z100normal > start Normal Align=center>N11normal >T0202normal > changes 2 left slant knife Normal Align=center>N12normal >M3S400normal > is turning, rotate speed is 400r/minnormal Align=center>N13normal >G0150Z100normal > builds workpiece coordinate to fasten Normal Align=center>N14normal >X115Z2normal > approachs work quickly around Normal Align=center>N15normal MARGIN of – of 0cm 0cm 0pt">Z: Speed of cutting tool of 0cm 0cm 0pt"> to Z – 47 length are in Normal Align=center>N16normal >G71U1R0.

5P17Q19X0.

5Z0F100normal > , every time cutting deepness U: 1mm(radius is worth) , retreat a knife to measure R every time: 0.

5, surplus of X direction finish machining 0.

5mm (the diameter is worth) Normal > begins the 17th paragraph for finish machining paragraph, the 19th paragraph ends paragraph of Normal Align=center>N17normal >G01X88.

79F90normal > initiative paragraph, normal > with the feed speed of 90mm/min linear cutting nods X coordinate Normal Align=center>N18normal MARGIN of – of 0cm 0cm 0pt">Z: Cutting tool of 0cm 0cm 0pt"> is linear cutting nods Z coordinate Normal Align=center>N19normal MARGIN of – of 0cm 0cm 0pt">X114Z: The end of outline of finish machining of 0cm 0cm 0pt"> paragraph, normal > is linear cutting nods Normal Align=center>N20normal >G00150Z100normal > start Normal >N21normal >M30normal > stops, if program of the cone outside program end treatment expresses 1 to show (note: Radius of circular arc of point of a knife ignors) . 2, the 　 of CNC Machining 　 of groove guide pulley 1.

If the graph is shown 3 times,the craft of part drawing and difficulty are analysed, this spare parts includes inside aperture of round a flight of stairs, outside columnar face, included angle is cant of two V of 90 ° groove. Semifinished product dimension is Φ 110 × 55mm. Graph difficulty of part drawing of 3 groove guide pulley analyses: Axis of two bearing Kong Tong spends the tall; of precision of bearing hole size of two Φ 62mm difficult treatment of two V of ° of requirement tall;90 groove. 2.

Treatment program uses two several cars to divide a working procedure to undertake machining surely really. (The ◎ of treatment program 　 that 1) counts a car the first times clips workpiece directly, the ◎ of 　 of via; 　 that machines ◎ of 　 of 　 of end panel; to get Φ 40mm with broach with knife of an end panel changes the circle outside treatment of 2 extras round knife to come Φ 108mm, length is 30mm, the outfit of tune of ◎ of 　 of fiducial; 　 after serving as tune places face of the circle outside already was being machined, search, change knife of an end panel to machine end panel to be 51mm to control ◎ of; 　 　 to change knife of the 3 aperture inside date to machine a diameter to be Φ 62mm to length, the bearing aperture of deepness 20mm reachs Φ 52mm, length is 30mm inside Kong Zhifu adds up to ◎ of 　 of dimension; 　 to check, school nucleus. (The bearing hole that the ◎ of treatment program 　 that 2) counts a car the 2nd times places Φ 62mm with the outfit that turn over claw () of mat sheet copper, search, kong Zhifu adds up to the bearing that is ◎ of 50mm; 　 　 to change knife of the 2 aperture inside date to machine another Φ 62mm to length with end panel of finish machining of an end panel knife ◎ of 　 of dimension; 　 changes 3 extras circle the circle outside knife treatment comes 　 　 ◎ changes Φ 105mm; . ◎ examination, school nucleus. 3.

Numeric computation 　 (origin of 1) set program is program origin to build workpiece coordinate with the node of workpiece right end panel and axes is. With 4 machine clip cuts off a knife to be opposite when the knife, after touching workpiece right end panel with left point of a knife, slant in the knife express 4 knives try cut length column to be in input Z=0, slant in the knife again express 5 knives try cut length column to be in input Z=4(Dao Kuan to be 4mm) . T0404 of cutting tool function is being carried out when process designing namely is part of left of treatment V chamfer, executive cutting tool machines share of V chamfer right when functional T0405. (2) is calculated A(101 of 　 of value of coordinate of each node position, 0) , b(105, – 2) , c(105, – 10) , d(81.

0, – 22) , e(74, – 22) , f(74, – 28) , g(81.

0, – 28) , h(105, – 40) , i(105, – 48) , j(101, – 50) . 4.

If program of the circle outside machine program treatment and V chamfer expresses 2 to show (note: Radius of circular arc of point of a knife ignors) . Express 2 programs to block Normal > numerical control blocks Normal MARGIN of origin of Center" Align=center> process designing: 0cm 0cm 0pt; TEXT-ALIGN: The nodical Normal Align=center> workpiece and axes: 0cm 0cm 0pt"> writes date Normal >normal >normal MARGIN of name of Center" Align=center> spare parts: 0cm 0cm 0pt; TEXT-ALIGN: Horn of Center" Align=center> slide block annulus Normal MARGIN of part drawing date of 0cm 0cm 0pt"> : 0cm 0cm 0pt; TEXT-ALIGN: 3normal Align=center> graph: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> material: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center>45# round steel: 0cm 0cm 0pt">normal MARGIN of model of Center" Align=center> lathe: 0cm 0cm 0pt">normal > places sign one's name to weigh Normal Align=center>normal MARGIN of workshop of Center" Align=center> solid example: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> numerical control: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> program: 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center>%0089normal MARGIN of system of process designing of 0cm 0cm 0pt"> : 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center> China Normal MARGIN of Center" Align=center> serial number: 0cm 0cm 0pt; TEXT-ALIGN: Normal Align=center> program: 0cm 0cm 0pt; TEXT-ALIGN: Center" Align=center> shows Normal Align=center>N1normal >T0303normal > chooses Normal Align=center>N2normal >M3S500normal > is turning, rotate speed is 500r/minnormal Align=center>N3normal >G0150Z100normal > builds workpiece coordinate to fasten Normal Align=center>N4normal >X112Z2normal > approachs work quickly around Normal Align=center>N5normal >X101normal > moves to be in Normal Align=center>N6normal >G01Z0F100normal > with the feed speed of 100mm/min linear cutting nods place Normal Align=center>N7normal MARGIN of – of 0cm 0cm 0pt">X105Z: 0cm 0cm 0pt"> pours horny Normal Align=center>N8normal MARGIN of – of 0cm 0cm 0pt">Z: Cutting of cutting tool of 0cm 0cm 0pt"> reachs 50 point of Z – Normal Align=center>N9normal >G00150Z100normal > start Normal Align=center>N10normal >T0404normal > cuts off a knife 4 numbers, carry out 4 knives filling Normal Align=center>N11normal >M3S350normal > is turning, rotate speed is 350r/minnormal Align=center>N12normal >G0150Z100normal > builds workpiece coordinate to fasten Normal Align=center>N13normal >X106Z2normal > approachs work quickly around Normal Align=center>N14normal >M8normal > opens cooling fluid Normal Align=center>N15normal MARGIN of – of 0cm 0cm 0pt">Z: Speed of cutting tool of 0cm 0cm 0pt"> is in Normal Align=center>N16normal >G01X74F15normal > with the feed speed of 15mm/min linear grooving nods X coordinate Normal Align=center>N17normal >G00106normal > is fast go back Normal Align=center>N18normal >G71U1R0.

5P19Q22X0.

5Z0F100normal > , every time cutting deepness U: 1mm(radius is worth) , retreat a knife to measure R every time: 0.

5, surplus of X direction finish machining 0.

5mm (the diameter is worth) Normal > begins the 19th paragraph for finish machining paragraph, the 22nd paragraph ends paragraph of Normal Align=center>N19normal >G1X74F80normal > initiative paragraph, normal > with the feed speed of 80mm/min linear cutting nods X coordinate Normal Align=center>N20normal MARGIN of – of 0cm 0cm 0pt">Z: Cutting of cutting tool of 0cm 0cm 0pt"> is in Normal Align=center>N21normal >X81normal > is in Normal Align=center>N22normal MARGIN of – of 0cm 0cm 0pt">X105Z: The end of outline of finish machining of 0cm 0cm 0pt"> paragraph, normal > nods Normal Align=center>N23normal MARGIN of – of 0cm 0cm 0pt">G00106Z: The start before cutting tool of 0cm 0cm 0pt"> returns G71 to machine is in Normal Align=center>N24normal >T0405normal > carries out 5 compensation cost, it is a knife with right point of a knife dot Normal Align=center>N25normal >G71U1R0.

5P26Q29X0.

5Z0F100normal > , every time cutting deepness U: 1mm(radius is worth) , retreat a knife to measure R every time: 0.

5, surplus of X direction finish machining 0.

5mm (the diameter is worth) Normal > begins the 26th paragraph for finish machining paragraph, the 29th paragraph ends paragraph of Normal Align=center>N26normal >G1X74F80normal > initiative paragraph, cutting tool with the feed speed of 80mm/min linear cutting nods X coordinate Normal Align=center>N27normal MARGIN of – of 0cm 0cm 0pt">Z: Cutting of cutting tool of 0cm 0cm 0pt"> is in Normal Align=center>N28normal >X81normal > is in Normal Align=center>N29normal MARGIN of – of 0cm 0cm 0pt">X105Z: The end of outline of finish machining of 0cm 0cm 0pt"> paragraph, cutting tool machines C dot. Normal Align=center>N30normal >G00150Z100normal > start Normal Align=center>N31normal >M30normal > stops, close cooling fluid, the program ends 3, the last word flying development as science and technology, because numerical control lathe has advantageous treatment characteristic, the application in mechanical manufacturing industry is wider and wider, to produce the effect of numerical control lathe adequately, we need to master certain skill in process designing, the work out gives reasonable, efficient machine program, make sure treatment gives the eligible work that accords with blueprint requirement, can make the function of numerical control lathe gets rational application and sufficient play at the same time, make numerical control lathe works can safely, reliably, efficiently. CNC Milling CNC Machining