Statified whorl of law turning echelon

  • Time:
  • Click:108
  • source:EAGLEBURGER CNC Machining
Summary: Common echelon screw cutting, because turning treatment difficulty is greater, operation skill demand is higher, it is more difficult to make abecedarian study rises consequently. To solve this difficult problem, the author put forward to operate simple, intelligible mix easy control " statified " turning method. Foreword echelon whorl than trigonometry whorl, its pitch and tooth big, and precision is tall, surface roughness of surface of tooth two flank is worth lesser, when causing echelon screw cutting, penetration of a cutting tool is deep, take a knife fast, cutting surplus is large, cutting fights muscularity. The turning treatment difficulty that this caused echelon whorl is greater, the student grooms in lathe work skill in be hard to master, easy generation ties knife appearance, make the student produces insecurity and awe-stricken psychology to this then. In teacher and student of old lathe work exercitation, through fumbling ceaselessly, summary, perfect, also had certain acknowledge to the turning of echelon whorl, we come to dug below method of which kinds of turning suits abecedarian more understanding, study and master. Of method of 1 echelon screw cutting when choosing turning echelon whorl, use cutting tool of high-speed steel material to undertake low speed turning normally, whorl of echelon of low speed turning is like the method of 4 kinds of feed that the graph shows 1 times commonly: Take law of straight chamfer of law of law, or so cutting, car and way of chamfer of car a flight of stairs continuously. Apply to turning pitch only into the law continuously normally lesser (the echelon whorl of P<4mm) , and thick car pitch is bigger (the echelon whorl of P>4mm) often uses method of chamfer of a flight of stairs of law of straight chamfer of law of or so cutting, car and car. We part below dug method of these a few kinds of turning: Graph the method of 4 kinds of feed of 1 echelon screw cutting takes a way continuously: Also call grooving the law into the law continuously, if pursue,1(a) place is shown. When turning whorl, in be being used only, procrastinate board undertake transverse (perpendicular at slideway direction) feed, screw cutting is finished in a few journeys. Although this kind of method can win properer tooth form, the operation is very simple also, but as a result of cutting tool 3 cutting blade attends cutting at the same time, vibration is bigger, tooth side pulls a burr easily, get better exterior quality not easily, easy generation ties knife appearance, accordingly, it applies to the echelon screw cutting with lesser pitch only: Control cutting standard: When whorl of echelon of turning of law of or so cutting, besides in using, procrastinate board outside the transverse feed of scale control lathe tool, still use at the same time small procrastinate board the feed of or so minim of scale control lathe tool, till tooth form all car is good, if pursue,1(b) place is shown. When using whorl of car of law of or so cutting, because be lathe tool two advocate cutting blade is undertaking bosseyed cutting medium, avoided 3 blade at the same time cutting, so not easy generation ties knife appearance. Additional, low speed chooses as far as possible when fine vehicle (V=4 ～ 7m/min) , pouring cutting fluid, can acquire very good surface character commonly. In the student in actual unit process of cargo bandling, want a foundation practical experience, control or so feed at the same time, observe the condition that cut bits at the same time, when eduction cut when bit is very small, the whorl face that can use smooth full treatment to make the car goes is bright and clean, precision is very tall also. But operation of law of or so cutting is more complex, small procrastinate board the as a result of idle stroke influence when feed of or so minim is easy make mistake, and in procrastinate board and small procrastinate board at the same time feed, both feed quantity size and scale are not fixed, every knife cutting measures bad control, tooth not easy also car gets clarity. So, law of or so cutting is mixed to the competence of handlers cutting skill demand is higher, do not suit to abecedarian learns and master: Law of car straight chamfer: The car chooses knife head width to be less than lathe tool of whorl of rectangle of tooth chamfer full-bottomed a bit commonly when whorl of echelon of turning of straight chamfer law, use transverse come into whorl of law thick car continuously trail dimension (every edge stays have 0.

2 ～ 0.

The surplus) of 3mm, change nap of the lathe tool that use energy next, if pursue,1(c) place is shown. This kind of method understands simply, easily, easy control, but in turning when the echelon whorl of bigger pitch, cutting tool because its knife head is long and narrow, break off intensity is insufficient and easily: The groove of cutting is deeper, platoon bits is not smooth, cause accumulation cut bits knife head " be bungled " : Feed is lesser, cutting speed is inferior, satisfy the turning need of echelon whorl very hard consequently: Law of chamfer of car a flight of stairs: To reduce " straight chamfer law " the damage level of head of the knife when turning, we can use method of chamfer of car a flight of stairs, if pursue,1(d) place is shown. This method also is to use rectangular whorl lathe tool to undertake grooving likewise, just not be to be cut directly to trail dimension, divide into a certain number of knife cutting to become chamfer of a flight of stairs however, change the measure that provides to place with nap of lathe tool of essence of life finally. Such cutting platoon bits are smoother, the method is simpler also, but helix of not easy alignment is straight when changing a knife groove, assure correct tooth very hard model, produce phenomenon of set one's teeth on edge easily. Graph 2 statified whorl of law turning echelon is narrated on graph put together: Divide outside taking a way continuously, other method of 3 kinds of turning can differ to level land is reduced or avoid 3 blade at the same time cutting, make a bits smoother, point of a knife suffers circumstance of force, be heated to be improved somewhat, appear not easily thereby vibration and the phenomenon that plunge into a knife, still can increase cutting dosage, improve whorl surface quality. So, law of law of or so cutting, car straight chamfer and law of chamfer of car a flight of stairs won wide application. However, to abecedarian, method of 3 kinds of turning masters above it is more difficult to rise, the operation rises trivaller, remain to be mixed at be being changed easily simplification. Pass old teacher and student, practice to discover, "Statified turning echelon whorl " can make a student easy understand and master. 2 " statified law " turning echelon whorl " statified law " turning echelon whorl is the integrated application that receives law and standard of or so cutting continuously actually. In turning when the echelon whorl of bigger pitch, "Statified law " not be one-time normally come out echelon chamfer cutting, divide tooth chamfer into a certain number of layers however (every probably deep) of 1 ～ 2mm, change into a certain number of more shallow echelon chamfer will undertake cutting, reduced turning difficulty thereby. Each cutting uses the turning method of the left and right sides after be being entered continuously first, because the chamfer when or so cutting is deep changeless, cutting tool simply does towards the left or rightward is fore-and-aft (edge slideway direction) feed can (show) 2 times like the graph, accordingly it is compared above way of mentioned or so cutting should be mixed simply maneuverable much. The computational formula of echelon whorl reachs his to join numeric rank right list. Below it is with 6-7e of turning Tr36 × exemple, introduce " statified law " turning echelon whorl: Formula of computation of code name of name of the computational type of echelon whorl and watch of its ginseng numerical value and ginseng are numeric / Mm tooth carries clearance Ac0 on the head.

Diameter of nominal of D of 5 old way (Ø360-0.

The diameter in 3750) D2d2=d-0.

5P=Ø33-0.

473-0.

118 trail D3d3=d-2h3=Ø29-0.

5370 teeth tall H3h3=0.

5P+ac=3.

5 teeth carry wide Ff=0 on the head.

366P=2.

Wide Ww=0 of 196 teeth bottom land.

366P-0.

536ac=1.

928 " statified law " the cutting tool choice of turning echelon whorl: "Statified law " the thick lathe tool that place of turning echelon whorl uses and lathe tool of essence of life and other treatment method are basic and same, the knife head width that is thick lathe tool only (W knife =1.

2 ～ 1.

5mm) is less than tooth bottom land wide (W=1.

928mm) , horn of cutting tool point of a knife (29 ° ;30) is less than ～ of Er=29 ° ; slightly echelon whorl tooth horn (A=30 ° ;) . "Statified law " the operation measure of turning echelon whorl: Old way of whorl of echelon of vehicle of thick, fine (Ø36-0.

3750) and pour horn and end panel to become 15 ° ; . Whorl old way also can stay here have 0.

The nap surplus that 15mm controls, so that whorl fine vehicle is over hind, discover the tooth has very nap can undertake when tear off and be out of shape: With echelon whorl thick lathe tool takes a way continuously probably the car comes in 1/3 tooth chamfer (H1=1mm) , because cutting deepness is not big, cutting force is lesser, won't arise commonly vibration and plunge into a knife, if pursue 2 show with graph 3(a) place. Right now, procrastinate in board stop feed and do transverse feed (lathe tool enters) of original deepness of penetration of a cutting tool every time, use only small procrastinate board make lathe tool towards the left or do minim feed right, feed is probably 0.

2 ～ 0.

4mm, feed frequency inspects particular case and decide, if pursue,widen tooth chamfer with rapidder rate 2 with the graph (B) place is shown. Very wide F(f is the tooth after widening 2.

5mm is controlled) should be more than theoretical calculation to be worth F(f=2.

196mm) , make sure two flank leave whorl have 0.

The fine vehicle surplus that 15mm controls: Graph 3 echelon whorl " statified law " the measure of turning widens go back of head of lathe tool knife to ground floor the intermediate position of tooth chamfer (need only will small procrastinate board the half) that go back lends knife case number, then reoccupy enters law cutting continuously the 2nd, probably the car comes in 2/3 tooth chamfer [H2=2mm, be like graph 3(c)] , next in procrastinate board stop transverse feed, widen with law of or so cutting tooth chamfer [the 3(d)] that be like a graph. Widen when tooth chamfer, should the coincide of the flank of two teeth chamfer the 2nd and ground floor, the attention does not want again turning arrives the flank of chamfer of ground floor tooth, otherwise the fine vehicle surplus that the tooth carries on the head is likely and insufficient: Repeat afore-mentioned measure, continue to use enter law and car of law of or so cutting to come continuously three-layer (tooth tall H3=3mm) mixes the 4th (tooth tall H4=3.

5mm left and right sides, d3=Ø29-0.

5370) , widen next tooth chamfer (graph 2) . "Statified law " the frequency of turning can is twice, 3, more even second, intensity of the size that particular case inspects pitch, lathe tool wait and decide: Change the lathe tool that use energy to part the side of or so two teeth of fine vehicle whorl [graph 3(e)] , general first a side of chamfer of fine vehicle good tooth, again other a side of chamfer of fine vehicle tooth, make sure the technology such as precision of dimension of screw center diameter and surface roughness of surface of two teeth side asks at the same time. From above treatment process can see, "Statified law " turning echelon whorl has a few more the following advantage: The operation is relatively simple, understand easily and master: It is bits difficulty, easy to basically overcame 3 cuttings, platoon tie the issue such as the knife: Can get clearer tooth model, can increase cutting dosage to manufacture efficiency in order to rise, assure dimension precision and the exterior surface roughness with be obtained better easily at the same time. 2 last words are in practice education, "Statified law " this kind understand easily, the method of turning echelon whorl that easy control, got is sure become reconciled is judged adequately. Teacher can relatively explain and impart turning method figure, more intuitionisticly to the student, the student is general also can understand easily and master method of this kind of turning, reduced echelon screw cutting greatly the education difficulty of this one task and intensity. But the turning of whorl of the echelon in producing practice is quite complex, a kind of method cannot apply to go merely in turning process turning, and should achieve mastery through a comprehensive study of the subject, accordingly the student masters only and skilled all sorts of turning methods, ability is applied neatly in turning process, finish echelon screw cutting efficient, high accuracy, high qualitily. CNC Milling CNC Machining