# Tornado milling whorl combs the research of form milling cutter

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9 times; Thank Ming Qinke to think: Comb the external diameter D of form milling cutter should be to be machined 0 of D of thread inside diameter.

85 ～ 0.

95 times; and some technologies ground of data criterion experience will comb the external diameter D of form milling cutter is taken to be machined 0 of D of thread inside diameter.

643 ～ 0.

65 times. These took a value to all appear in design application the quality question with different level, we are on academic research and the foundation that design practice, through many manufacturing practice, put forward to use at medical canister of thread machining comb the computation of external diameter of form milling cutter is formulary: D=(0.

7 ～ 0.

In 8)d-D type: D-- the diametical public errand when combing milling cutter shovel is ground, take D=0 normally.

2 ～ 0.

Better land solved 6mm this formula to comb the design problem of external diameter of form milling cutter, canister of can contented medicine the quality requirement of thread machining. (The influence of A) wear extent (B) combs the influence of milling cutter profile pursues 3 wear extent and comb milling cutter profile is opposite age a high impact those who comb form mill tooth carries tall Hd on the head is affirmatory should mature the influence of the wear extent Dhd that its allow (3) seeing a picture. The purpose is the height that when whorl is being machined after assuring to comb face of the knife after form milling cutter wears away, still is necessary, because this combs,the tooth form height of form milling cutter must compare the wear extent Dhd that whorl height allows greatly when the design. We reach through many design treatment practice its and be machined the relation between the pitch S of whorl is: DHd=0.

03S0.

75mm is relatively appropriate; combs the production public errand of form milling cutter is Dhd=0.

0163S1/3 is more appropriate, dd of such height of teeth top can press type calculates: In Hd=hg+dhd+Dh+d type: HG -- the;Dh of height of teeth root of whorl -- the displacement quantity that combs milling cutter allows: The B in Dh=(b-b)/[2tg(e/2)] type -- wide;e of chamfer of whorl tine bottom -- ;b of part of whorl chamfer body -- comb mill tooth carries wide B=(0 on the head.

75 ～ 0.

8)b pursues 4 comb of milling cutter before the 3 problems in combing form milling cutter is machined analyse knife face tooth form after whorl combs form milling cutter is like the horn before having, its tooth is sectional between the axis the tooth form on face of the knife before the tooth form inside is mixed differs with the cut form inside work law section namely, compare with the photograph when G=0 ° , produce certain machining error because of distortion, but this error is not big, be in especially G<Watch of the error when 5 ° is small. Accordingly, pledge to processing steel only commonly of medical canister comb form milling cutter (G>5 ° ) the tooth form on face of the knife before the tooth form inside axial section plane is mixed undertakes correction calculation or check a watch to revise calculation, usable also and constructive law seeks a tooth form. Comb the tooth form of face of the knife before form milling cutter is amended undertake correction by figuration milling cutter in order to make sure horn of tooth form of circumgyrate face axial is changeless, from the graph 4 medium geometry relations can see: Sinb1=Rsingp/(R-h10) Sinb2=Rsingp/[R-(h10+h20)] H10g=[(R-h10)sin(b1-gp)]/singp H20g=[(R-(h10+h20)]sin(b2-b1)]/sinb1 criterion: In Tg(ag/2)=tg(a/2)=(h10+h20)singp/{[R-(h10+h20]sin(b2-gp)} type: R -- comb milling cutter radius; Gp -- A of the horn before combing milling cutter carries blade on the head -- whorl tooth horn; Ag -- comb H10 of horn of tooth form of face of the knife before milling cutter, h20 -- comb height of teeth top of tooth form of axial of face of milling cutter circumgyrate and H10g of height of teeth root, h20g -- comb of height of teeth top of tooth form of face of the knife before milling cutter and whorl of canister of medicine of milling of tornado of height of teeth root comb form milling cutter because part of one of side tooth form are very small, to achieve the regular job angle of A0 of the horn after side edge, and use inclined age to the shovel, such combing that tooth form of form milling cutter supports twice with tine must come out in the treatment in be being adjusted, will ensure the tooth form after combing form milling cutter is ground again keeps changeless. Straight chamfer type combs when whorl of milling of tornado of form milling cutter, cutting is not smooth, vibration is bigger, the whorl appearance that causes mill to make contains not flowing ripple, comb especially when L of length of cutting of form milling cutter is bigger, the effect is most serious. To improve cutting position, can convert the structure of helix chamfer type, helix angle takes 5 ° ～ normally 8 ° , but it is easy to be made as a result of straight chamfer type, blade is ground and examine convenient, length of whorl of canister of together with medicine is shorter (L<20mm) , accordingly, we think of whorl of milling medicine canister comb form milling cutter uses straight chamfer type to be able to achieve treatment requirement, and economy is feasible. 4 epilogue the article combs to whorl of canister of tornado milling medicine parameter of two important designs undertook the external diameter of form milling cutter and height of teeth top consider to discuss, offerred computational formula and experience numerical value, the main problem that in be being machined to its, involves undertook an analysis. We study these to achievement all is used at combing the design of form milling cutter is mixed to make. From medical canister whorl (30mm of ～ of D=13 of diameter of whorl of brass medicine canister; Steel pledges the treatment of 32mm) of ～ of D=13 of diameter of medical canister whorl produces practice to make clear: Cutting tool designs parameter to be able to satisfy treatment quality requirement correctly, can producing actual in use. CNC Milling CNC Machining