Gear pours the design of arris knife

Use dish of form gear to pour arris knife undertake arris has arris type by the side of arris of tooth form of columnar gear end panel external efficiency of stability of quality of gear of much, treatment, treatment is tall (odd man-hour is 15 seconds) , cutting tool life is long, economic benefits is good wait for an advantage, it is the gear with a kind of practical and wide, effective suitable scope technique pouring arris. 1 gear pours arris to machine a principle to pursue 1 gear pours arris to machine a principle to pursue 2 commonly used forms pouring arris pursue 3 change the treatment mechanism that arris devises a principle to pour arris knife to pour arris with gear is principle of cold extruding of compulsive clench the teeth. If the graph is shown 1 times, when gear of treatment pouring arris, gear pours arris cutter shaft line and by parallel of treatment gear axes. According to principle of clench the teeth of parallel axis gear, use go up on cutter hub by bolt solid and with be aged continuously by two tooth form of treatment gear end panel is approximate (or inclined tine) dish form razor blade pouring arris, undertake bosseyed clench the teeth with the two arris edge of end panel of same teeth of a cogwheel respectively. Knife pouring arris drives gear clench the teeth compulsively to rotate, and at the same time radial feed is apart from to certain center, produce certain extruding force. Such, be gone up to be squeezed accordingly by tooth profile of treatment gear end panel in the edge give arris to come, stay on end panel of teeth of a cogwheel and tooth flank a few squeezes the flash that go out (burr) . Flash of end panel of teeth of a cogwheel is placing purify of knife of burr be goinged to by two of treatment gear on machine tool pouring arris by installation, flash of tooth flank of teeth of a cogwheel ages be aged by shave knife shave is divided in working procedure in shave. 2 razor blade pouring arris design the type pouring arris with current and commonly used principle to have 4 kinds: ① is bosseyed change arris edge pours arris (2a) seeing a picture; ② is bosseyed edge waiting for arris pours arris (2b) seeing a picture; ③ is double-faced change arris edge pours arris (2c) seeing a picture; ④ is double-faced edge waiting for arris pours arris (2d) seeing a picture. Generally speaking, ① is planted with ② the acute that type basically uses at helical gear pours arris by the side of Bian Leng. ③ is planted with ④ arris falls by the side of the arris that type basically uses at straight gear. Edge waiting for arris pours arris to be able to be in ministry of root of tooth profile of gear end panel stays have one small steps leading up to a house, and change arris edge pours arris criterion won't. Change arris design principle changes arris design principle is to be aimed at ① , ③ to be planted arris type puts forward. Changing is to point to by the side of arris from be supported to be in by the tine of tooth profile of end panel of treatment gear teeth of a cogwheel (amount pouring arris is the largest) transfer to tine root the curve begins to be in (quantity pouring arris is 0) pouring arris is gradually by wide narrow, differ by the side of arris namely wide. A tooth-like part of anything that produces form gear wheel suppose is very wide wider than be being aged support by the end panel of treatment gear small 2(is end panel of teeth of a cogwheel) of the largest amount pouring arris, its tine root is wide the transverse tooth thickness that begins to be in with curve be interimed by the root of end panel tine of treatment gear is equal, and tine number Z and be machined gear is same (3) seeing a picture. By the graph 3 knowable, produce form gear wheel tooth form and be differred by tooth form of treatment gear end panel. According to principle of gear clench the teeth, pour arris knife and two gear to assure all can normal clench the teeth, simply asks their base pitch is equal can, reason has PbS=Pb1, namely in Pmscosas=pm1cosa1 type: Ms -- by As of modulus of treatment gear end panel -- by pressure angle of treatment gear end panel M1 -- produce A1 of form gear modulus -- because,the amount pouring arris that produces tooth profile of end panel of gear of form gear pressure angle to age the top is in is =(d01/2)q Q=inv[arccos(db1/da1)]-inv[arccos(db/da)]-inv[arccos(db1/db)] so =(da1/2){inv[arccos(db1/da1)]-inv[arccos(db/da)]-inv[arccos(db1/db) ] in}(1) type: Da -- be aged carry round diameter Db on the head by treatment gear -- by Da1 of diameter of treatment gear basic circle -- produce form gear tine to carry round diameter on the head, da1=da Db1 -- produce diameter of form gear basic circle by type (the Db1 of basic circle diameter that 1) can produce form gear wheel certainly. Because of Pm1cos[arccos(db1/df1)]=pm1cos{arccos[db1/(m1Z)]}pm1cos{arccos[db1/(m1Z)]}=pmscosas M1cos{arccos[db1/(m1Z)]}=mscosas(2) type is so medium Df1 -- the pressure angle A1 that produces form gear to divide round diameter to produce form gear wheel pours arris to ask to dimension precision as a result of gear for A1=arccos[db1/(m1Z)](3) not tall, because this can be taken approximately,be machined Sbs of transverse tooth thickness of basic circle of gear end panel and produce Sb1 of transverse tooth thickness of form gear basic circle equal. Sbs, Sb1 is Sbs=db[(Sfs/df)+invas]Sb1=db1[(Sf1/df1)+inva1] type respectively in: Sfs -- by Df of transverse tooth thickness of round end panel of treatment gear cent -- be divided by treatment gear round diameter Sf1 -- produce form gear to because,divide round transverse tooth thickness Sbs=Sb1db[(Sfs/df)+invas]=db1[(Sf1/df1)+inva1]db{[(p+4xstanas)/2Z]+invas}=db1{[(p+4x1tana1)/2Z]+inva1} X1=[db((p+4xstanas+invas)-p-inva1]Zdb12Z2Z2tana1(4) type is so medium: Xs -- by X1 of modification coeffication of treatment gear end panel -- produce form gear modification coeffication to pursue principle of 4 designs waiting for arris pursues 5 graphs structure of 6 cutter hub pursues the arris design principle such as principle of 7 designs waiting for arris is to be aimed at ② , ④ to be planted arris type puts forward. Edge waiting for arris is to point to from be carried on the head what the curve begins to be in to be in tine root to transfer by the tine of tooth profile of end panel of treatment gear teeth of a cogwheel pouring arris is even, etc wide. Manage together, its yield the tine of form gear is very wide with tine root wide compare respectively be aged support by treatment gear end panel wide transfer with tine root the curve begins to be in width small 2, and tine number Z and be machined gear is equivalent (4) seeing a picture. By the graph 4 knowable, produce form gear wheel tooth form and be machined tooth form of gear end panel is identical. The amount pouring arris that with manage tooth profile of Pmscosas=pm1cosa1{m1=msa1=as(5) gear end panel distributes round part is 2=Sfs-Sf1=[(pms)/4]+xsmstanas-[(pm1)/4]-x1m1tana1 type (5) takes the place of to go up the design helical gear that type gets X1=xs-/(mstanas)(6)3 to pour the design method helical gear of arris knife to pour arris knife has edge to acute edge only normally, acute edge pours arris razor blade to be straight tine. To make the quantity pouring arris of helical gear end panel and tooth flank wide, also can design for inclined tine, its come back to with be machined gear is same. The root face of helical gear does not pour arris normally. Razor blade pouring arris designs a method to be as follows: The modulus M0 of razor blade pouring arris and pressure angle A0 are mixed with the modulus that produces form gear wheel accordingly respectively pressure angle is equal. The tine number Z0 of razor blade pouring arris should pour arris machine according to gear the largest center is apart from and the circumstance of machine of bit roll flute considers integratedly, choose maximum as far as possible, in order to prolong bit life. Primary election razor blade and the A that be apart from by the center of treatment gear: A=½(Z+Z0)m0 computation is machined gear parameter. Computation produces form gear parameter. Main parameter designs razor blade pouring arris as follows: End panel ages very wide Sa0 can ask to choose according to tooth intensity. Take allowable tine is very wide [Sa0]=0.

25m ～ 0.

4m, be like Sa0 ≥ [Sa0] , can continue to be calculated downward other parameter; Be like Sa0<[Sa0] , should reduce bit and the O that be apart from by the center of treatment gear, have above computation move afresh. School nucleus razor blade and 5) of graph be seeinged by the S(of axial jackknife width of treatment gear, in order to decide 3) of ～ of =S+(2 of knife of bit width B. When treatment pouring arris, to prevent bit and be happened to interfere by face of clench the teeth of treatment gear blame, should pour the corresponding side of bit wine cup (5) seeing a picture. In the meantime, bit a side is used blunt hind, can exchange left, right razor blade, use another side to machine, in order to prolong cutting tool life. Design of cutter hub structure sees a picture 6. Cutter hub can be used circularly, need to change only when treatment bit can. The tooth profile precision of bit can consult GB10095-88 " precision of involute cylinder gear " medium 7 class precision is chosen. What the design straight gear that straight gear pours arris knife uses arris razor blade to should be inclined tine commonly. One is dextrorotation, another is Zun Xuan (7) seeing a picture, its helix angle chooses B=35 ° relatively appropriate. The design calculation method that straight gear pours parameter of arris knife other and helical gear pour arris knife similar, need to regard them as only end panel parameter considers can. CNC Milling