The CNC Machining of echelon whorl

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Summary: Echelon whorl is the whorl of a kind of drive with wide application, its basically use numerical control machine tool to undertake machining. Because be opposite of echelon whorl ask in precision taller, the meeting in machining a process so brings about treatment because of the reason such as precision difficulty is taller, main conference appears frowsty car or tie the issue such as the knife, light a cutting tool attaint, weigh a machine tool to mar. But what should machine craft to analyse only is reasonable, use effective treatment method, use appropriate process designing statement, can make eligible echelon thread. Keyword: The graph in process designing of method of treatment of craft of thread machining of echelon of numerical control lathe classifies date: TG519 document label piles up: A article number: Whorl of 1007-9416(2012)07-0013-01 　 echelon is applied in industry relatively extensive, have the filar lever on lathe commonly, still have the contact of whorl of a few echelon. In contest of numerical control skill, the treatment of echelon whorl is increasing also, occupy score is more greatly also. So, when using numerical control lathe to machine, need undertakes reasonable analysis to echelon whorl craft, right choice machines cutting tool and the choice that pay attention to treatment method. Sound technology, correct cutting tool, good treatment method can assure the treatment quality of echelon whorl directly. The article from above a few respects spread out a specification: 1, the craft of echelon thread machining analyses 　 1.

The parameter of 1 echelon whorl reachs code name tooth part: Our country standard sets 30 ° ; Pitch: By whorl standard regulation; Old way (nominal diameter) D; In diameter D2=d-0.

5P; Trail D3=d-2h3; The tooth is tall: H3=0.

5P+ α C; The tooth is very wide: F=0.

366P; Tooth bottom land is wide: W=0.

366P-0.

536 α C; The tooth carries clearance on the head: α C, it is when P 1.

5 ～ 5 when, α C value is 0.

25; It is 6 ～ when P 12 when, α C value is 0.

5; It is 14 ～ when P 44 when, α C value is 1. The code name of echelon whorl: The code name of echelon whorl uses a letter " Tr " reach pitch of nominal diameter × to express, the unit all is Mm. Left whorl coming back needs to be added after measurement standards note " LH " , dextrorotation need not be tagged. 1.

The cutting tool of 2 echelon whorl chooses 　 (lathe tool of whorl of 1) hard alloy echelon manufactures efficiency to rise, the echelon whorl lathe tool that can use hard metal has thick car. Knife head width should be less than tooth bottom land wide. (Lathe tool of whorl of echelon of 2) high-speed steel this knife can turning goes out relatively the whorl of high accuracy and lesser surface surface roughness. Can use at fine vehicle. 1.

The treatment method on numerical control lathe enters 3 echelon whorl continuously X of triton grain lathe tool comes to intermittent feed when this kind of method is being used to machine echelon whorl in the tooth, the 3 treatment face of lathe tool gets power at the same time, medicinal powder hot condition is poorer, lathe tool wears away very easily, still can arise when feed amount is too large " plunge into a knife " , go to engrave of tooth shape face, can break off even lathe tool. Square syncline of tooth of edge of lathe tool of the inclined whorl that take a way horn comes to intermittent feed in the tooth. When using this kind of method to machine echelon whorl, only a side edge participates in cutting, make a bits more successful thereby, of point of a knife suffer force and be heated circumstance to be improved somewhat, cause not easily in turning " plunge into a knife " phenomenon. When echelon whorl is machined on numerical control lathe, choose G76 instruction to undertake process designing is machined, use when undertaking turning into the law continuously, pick good echelon knife, reduce amount of back penetration of a cutting tool, choose proper feed, add sufficient cutting juice, can reduce the phenomenon that plunge into a knife as far as possible. 1.

The measurement technique 　 of 4 echelon whorl (plug guage of 1) echelon whorl measures a way: Undertake with standard whorl ring gauge omnibus measure. (2) single shot measures a way: Need to use needle of a quantity only, place in helix chamfer, with micrometer the quantity gives thread outside diameter and the space between the acme that measure a needle. (3 needles of 3) measure a way: This kind of method is a kind of when measure screw center diameter more accurate method. This method is used when having higher demand to the precision of echelon whorl. When measuring, put the quantity pin with 3 equal diameters in same a helix chamfer is medium, with micrometer the quantity produces both sides to measure the interval between needle acme. 2, if example of process designing of echelon thread machining pursues 1 have a simple echelon thread, undertake to its craft is analysed, with G76 instruction process designing. (Is the data of the echelon whorl with 1) necessary computation worth: ? ⊙ column?h3=0.

5P+ α C=0.

5 × 6+0.

5 ＝ 3.

D=36 of 5 　 old way; In diameter D=d-0.

5P=36-0.

× of D=d-2h3=36-2 of trail of 　 of 5 × 6=33; 3.

5=29; The tooth carries wide F=0 on the head.

366P=0.

366 × 6=2.

Wide W=0 of bottom land of 196 　 tooth.

366P-0.

536 α C=0.

366 × 6-0.

536 × 0.

5=1.

928 　 inquire table of allowance, record tolerancepublic errand cost, when undertaking metrical repair comes dimension public errand. (Does 2) machine technology measure: ? > the Zun Duan that?) of dark stay of proceedings of Huan of coerce of ill ⑶ of Xiang of  of ぜ of す of Hang Yong of sword of show off hesitating clips workpiece, extend be more than 36mm to add the length with wide chamfer, make sure turning echelon whorl retreats knife distance enoughly from time to tome. Right end panel of 2) turning workpiece, undertake pair of knives. 3) is used outside the great classics of whorl of echelon of vehicle of thick, fine reachs round lathe tool ∮ 36mm, length 36mm, pour C3 wine cup. Grooving of 4) grooving knife pours the left end panel of ∮ 36mm C3 wine cup. The 2nd pace: 1) of turning echelon whorl writes a program, the amount of penetration of a cutting tool of the smallest back that sets whorl of thick car echelon is 0.

05mm, surplus of car saving essence of life 0.

06mm. 2) after whorl of echelon of two fine vehicle, measure dimension to undertake correction. (3) writes program of echelon whorl numerical control. O0001; T0303 (echelon whorl knife) ; M42; M03 S350; G43 G99; G00 X38 Z5; G76 P020030 Q50 R0.

08; (Set finish machining two, tooth horn is 30 ° , the quantity of penetration of a cutting tool of the smallest back when whorl thick car is 0.

05mm, fine vehicle surplus is 0.

08mm. ) 　 　 G76 X29 Z-38 P3500 Q100 F6; (set whorl is high 3.

5mm, the first knife is cut deeply 0.

1mm. ) 　 　 G00 X100; Z100; M05; M30; 3, epilogue is in to echelon whorl through above the analysis of each respects, the reasonable setting that machines parameter of craft ﹑ process designing. In heading these analysises real operation, so we are in on numerical control lathe when treatment echelon whorl, with respect to meeting general problem greatly reduce. Can machine a more perfect echelon whorl on numerical control lathe so. Bibliographical reference 　 [chief editor of 1] Xu Hongyi.

Lathe work (technician is senior technician) [M] .

Press of Chinese labor social security.

[Chief editor of 2] Han Hongluan.

Numerical control lathe work (technician is senior technician) [M] .

Machinist trade publishing house.

The article is picked from Chinese paper net, textual address: Http://www.

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