The spline inside helix of alveolus multi-line involute is machined on common lathe

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Summary: Put forward a kind to process the technique of the spline inside helix of alveolus multi-line involute on common lathe, introduced lead computation, spline to divide line, main shaft to fall fast, the method such as calculation of form of cutting tool blade and outfit knife. The 1 foreword development as science and technology and production, involute helix spline deputy more and more apply at all sorts of main transfer machinery widely, in use process, the spline inside helix wears away more easily, belong to fragile. To the spline inside helix of involute of large hole multi-line, can inserting tine machine or machine on other equipment; But the treatment of the spline inside helix of alveolus multi-line involute is relatively difficult, although manufacturer undertakes on special broaching machine broaching is machined, but to sheet, economy of both neither of small lot treatment expends man-hour again. We are opposite helix kind on the foundation that theory of spare parts treatment and craft study for years, put forward a kind to machine the method of the spline inside helix of alveolus multi-line involute on common lathe. Line of branch of the lead calculation that the article involves with respect to this method, spline, main shaft falls fast, form calculation, blade grinds cutting tool blade to wait for one introduction with outfit knife. The implementation of lead of 2 special whorl is mixed to special whorl the lead of the whorl that be not mark, can use normally special hang round of law to give implementation. This treatment method in principle is not made special hang annulus, the function that uses common lathe itself however will come true. It is with C620-1 lathe exemple, we allocate the pitch on lathe nameplate the watch to complement and be expanded by 138 kinds of original pitch reach nearly 1000 kinds. Register round of case like common lathe adjust a space bigger, allow to increase to hang round of combination newly, still can increase more pitch. Have through reset lathe hang gear of round of assorted a few drive, attainable hang newly annulus than, use the relation between them to be able to seek the pitch cost with a new more. If primary speed ratio of bed of C620-1 general be open to traffic is 42/100 and 32/97, compare driving pulley through handing in throw-over attainable new speed ratio 42/97 and 32/100, accordingly attainable a group of new pitch worths. To the special lead that comes true not easily with afore-mentioned methods individually, can use change the sheet of a driving pulley or driven pulley hangs round of law to give solve. When the method distributing a line of 3 multi-line whorl machines the spline inside big lead helix, if what choose the tine of gear of lathe main shaft to count but by inside the line of spline counts divide exactly, criterion law of line of main shaft branch is the optimal method that distribute a line. This method is handy, efficient and the quality that distribute a line is higher. If be machined the pitch of the spline inside multi-line helix but by divide exactly of pitch of lathe guide screw, can undertake distributing a line with split nut of lathe guide screw directly (but this method has certain limitation) . If two kinds of methods all cannot satisfy above to be machined the lead of the spline inside helix, can use guide screw split nut and method of combination of amendatory of small tool carrier to have thick branch line when thick car, use when fine vehicle smooth knife next hang round of law that distribute a line to undertake distributing a line. To the spline inside the helix of small lead, but gauge block of have the aid of and line of branch of dial gauge calibration. Graph sketch map of 1 reducer decelerate pursues block diagram of program of calculation of form of blade of 2 lathe tool 4 lathe main shaft falls when fast method machines spare parts of big lead helix, need reduces rotate speed of lathe main shaft. Fall fast method but the basis is mixed by the lead of the spline inside treatment helix material machinery function, act on an operation the principle with handy, reliable economy undertakes choosing. To treatment of the spline inside the helix of tall hardness material, in pitch is machined to allocate a watch on C620-1 lathe metric (pitch is 26 ～ 48mm) , imperial (13/32 ～ 3/4) , modulus (6.

5 ～ 12) and diameter section (3) of 1 5/8 ～ when 4 kinds of whorl, fall to realize main shaft fast, need to will walk along the handle C of knife box to be alternated by positional Ⅱ to positional Ⅰ only, other handle position is changeless, can reduce main shaft rotate speed 4 times. It is treatment of the spline inside the 100 ～ 200mm, helix that uses average data to lead, the V that can get on lathe electromotor take round of diameter to reduce 1/2, criterion main shaft rotate speed can reduce 1/2 subsequently, achieve more reasonable cutting rate. To lead > treatment of the spline inside the helix of 200mm, can use reducer decelerate, if pursue,1 is shown. If the condition is permitted, also can use pair of fast electric machinery to undertake falling fast turning. Because the end of the spline inside helix of alveolus multi-line involute is sectional,install tooth form is involute, sectional tooth form is the law the specific curve that is not involute, because this is when turning treatment, use radial to hold a knife (parallel holds a knife at end panel) the form of lathe tool blade of means and use a method the form of lathe tool blade to the means that hold a knife is different, former for involute, can process the tooth form of involute end panel that gives work directly through copying; And latter needs to be ground through blade trim the crucial point wear specific curve, in order to assure a standard to tooth form of proper involute end panel can be won when the cutting that hold a knife. What the big lead of the spline inside multi-line involute helix and great spire rise horn to give cutting tool blade look is correct long grind bring certain difficulty. For this, we designed program of calculation of form of lathe tool blade, program block diagram is shown 2 times like the graph. Use this program calculable a radial outfit knife and law nod coordinate to the form of lathe tool blade when holding a knife, can plan to combine form of edge of dispatch a vehicle, tooth form precision can plan to add up to check the number to try to control through increase and decrease. According to form of lathe tool blade enumerated data, can make model of form of cutting tool blade, and the blade look that accordingly blade wears lathe tool of essence of life (the blade of thick lathe tool is ground can handle) by handlers proper motion. If machine the spot to spline of appropriate straight tine involute inserts tine knife, the model of form of lathe tool blade that can be used at making radial hold a knife directly, omit form of lathe tool blade is calculated thereby measure. If be machined spline accuracy class is not high (9 class are the following) , and helix angle is not big (B<30 ° ) , criterion the form of lathe tool blade to outfit knife can press the law to age involute spline ages with equivalent several Zv are calculated continuously, computational formula is number of involute spline tine for the Z in Zv=Z/cos3b type. This method machines the tooth form that give to be approximate tooth form, and teeth shape error increases along with the accretion of helix angle B. Because radial acts knife cutting and way,use form of lathe tool blade to differ to place of the cutting that hold a knife, the respective method that hold a knife is not accordingly same also. Law to when holding a knife, as a result of lathe tool two point differ tall, because this needs to use dial gauge or gift of part of ten thousand energy to undertake metrical debugging, in order to make sure cutting tool installation is correct; When radial holds a knife, need to make lathe tool aims a center only can. Because the problem that the attention answers in 6 treatment exists clearance between the guide screw of lathe and nut, the likelihood when turning is machined affects the dimension precision of workpiece and exterior quality, when machining big lead, great spire to raise part of the spline inside horny helix especially, because of,often meet " let a knife " phenomenon and cannot turning. Because of spline must noticing when this turning two lateral process order, in order to remove clearance effect. When fine vehicle is machined, the rework after answering to be the same as spline treatment of one by one of tooth form of one direction lateral to finish first tooth form of another direction lateral. The durability to raise lathe tool and medicinal powder hot sex, liquid of right amount cutting can be used when cutting. We use 7 epilogue the spline inside helix of this involute of multi-line of methodological treatment alveolus (M=2.

5mm, z=10, a=30 ° , b=45 ° , lead T=111.

071mm) , treatment precision can satisfy part drawing paper completely to ask, treatment result is favorable. Treatment carries out a proof, this treatment method is handy and reliable, practical strong, can reduce the demand to machining equipment greatly, apply to each type to process a business, suit sheet especially, small lot production. CNC Milling CNC Machining