A CAD approach to helical groove machining—I. mathematical model and model solution

Kang, Seung-Gu; Ehmann, Kornel F.; Lin, Chen-Hao P.

doi:10.1016/0890-6955(95)92631-8

“…are given by equations (5) to (10). The external diameter, fixed to the root diameter, depends on the reduction coefficient of the thread profile height (k t ).…”

Section: Definition Of the Nominal Thread Profilementioning

confidence: 99%

“…Worms, threads, flutes and grooves are mostly defined by helicoids which are mostly machined with a disk type tool [7][8][9][10][11][12][13][14][15] and sometimes with an axial type one [10]. There exists several methods to compute interference errors (direct problem) and determine adapted tool profile (inverse problem) having a different complexity, approximation levels.…”

Section: Surfaces Machined With Form Tools and Interferencementioning

confidence: 99%

Modeling of interferences during thread milling operation

Fromentin

¹

,

Poulachon

²

2009

Int J Adv Manuf Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: https://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/7466 To cite this version :Guillaume FROMENTIN, Gérard POULACHON -Modeling of interferences during thread milling operation -The International Journal of Advanced Manufacturing Technology -Vol. 49, n°1, p.41-51 -2010 Any correspondence concerning this service should be sent to the repository Administrator : archiveouverte@ensam. eu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Modeling of interferences during thread milling operation Abstract: Thread milling is becoming more and more employed as a technique for producing thread, due to its advantages for industrial manufacturing sectors, such as the aeronautics, aerospace, and energy industries. The thread milling operation is atypical and several aspects have to be taken into account to perform it in good conditions. As for milling or grinding worms, grooves, thread or others sculptured surfaces, in thread milling, there exists a geometrical interference between the tool and the nominal surface which would be obtained. Thread mills have quite complex geometry and their profile has an effect on the machined thread. The present study details geometrical aspects of the thread milling process. This article deals with the link between thread mill geometry and nominal thread profile. An approach is proposed to analyze the thread profile generated by the thread mill envelope. It is deduced that thread milling produces interferences, i.e. the machined thread profile is affected by an overcut. A method is proposed to correct this geometrical error in order to produce accurate thread. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 D mgt : maximum diameter of the generated thread E r : radial error between nominal and generated thread 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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“…It is concerned with many cases like: worm, grooves grinding or milling [12][13], threads grinding [14], or flank milling of free form surfaces [15].…”

Section: Interference Analysismentioning

confidence: 99%

Geometrical analysis of thread milling—part 2: calculation of uncut chip thickness

Fromentin

¹

,

Poulachon

²

2010

Int J Adv Manuf Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: http://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/7469 To cite this version :Guillaume FROMENTIN, Gérard POULACHON -Geometrical analysis of thread milling -Part 2:Calculation of uncut chip thickness -The International Journal of Advanced Manufacturing Technology -Vol. 49, n°1-4, p.81-87 -2010 Any correspondence concerning this service should be sent to the repository Administrator : archiveouverte@ensam. eu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Geometrical analysis of thread milling -Part 2:Calculation of uncut chip thickness 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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“…The second is how to grind the thread mill from the CAD design. The definition of the grinding wheel profile used for the groove machining is a specific problematic due to inference problem [5][6][7][8][9]. This aspect of groove obtaining is also common to cylindrical mill manufacturing.…”

Section: Tool and Cutting Geometry Aspectsmentioning

confidence: 99%

“…The u parameter is the distance from point P m0 , and  is an angular parameter. The rake face (RF), which is considered as being a helicoid, can be parameterized by equation (6) according to [8,9].…”

Section: Rake Face Parameterizationmentioning

confidence: 99%

Geometrical analysis of thread milling—part 1: evaluation of tool angles

Fromentin

¹

,

Poulachon

²

2009

Int J Adv Manuf Technol

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: http://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/7470 To cite this version :Guillaume FROMENTIN, Gérard POULACHON -Geometrical analysis of thread milling -Part 1: Evaluation of tool angles -The International Journal of Advanced Manufacturing TechnologyVol. 49, n°1, p.73-80 -2010 Any correspondence concerning this service should be sent to the repository Administrator : archiveouverte@ensam. eu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 Keywords: thread milling, cutting geometry, tool angles Abstract: Thread milling is a method which is increasingly used for machining thread. For this operation, a helical interpolation is required. Furthermore, the thread mill is a tool whose geometry is rather complex. Its envelope profile is linked to the thread profile and a single tooth of the thread mill is composed of three continuous cutting edges. The present study proposes a geometrical model and an analytical formulation to define the rake face and the cutting edge. Further, the calculations of cutting planes and cutting angles are explained. The analysis shows specific aspects of thread mills, in particular the fact that the flute angle may lead to a negative rake angle. This study is a contribution to cutting geometry aspect and constitutes a step for cutting force model in thread milling.

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A CAD approach to helical groove machining—I. mathematical model and model solution

Cited by 120 publications

References 5 publications

Modeling of interferences during thread milling operation

Modeling of interferences during thread milling operation

Geometrical analysis of thread milling—part 2: calculation of uncut chip thickness

Geometrical analysis of thread milling—part 1: evaluation of tool angles

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