Numerical Analysis of the Extrusion Process of Twist Drills

Bulzak, Tomasz; Pater, Z.

doi:10.12776/ams.v19i2.97

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Screw extrusion is used in the manufacture of such components as twist drill, rotors of pumps, helical gears, etc. (Kim, Kubota & Yamanaka, 2008;Hwang & Chang, 2014;Bulzak & Pater, 2013).…”

Section: Introductionmentioning

confidence: 99%

New Extrusion Process for Producing Twist Drills Using Split Dies

Bulzak

Pater

Tomczak

2017

acs

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The paper presents a new extrusion process for producing twist drills using split dies. The design of the dies is described, where the profile of the flute-forming element is the same as the profile of the flute on the plane inclined to the drill axis at an angle equal to the helix angle. The proposed method for the extrusion of twist drills by the new type of dies is verified by numerical modeling. Three cases of the extrusion process are modelled, each with a different position of the flute-forming element relative to the axis of the drill. The paper investigates the effect of the position of the flute-forming element on the angle of inclination of the flutes and the cross-section shape of the drill. Numerical modeling is performed using DEFORM-3D.

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“…Screw extrusion is used in the manufacture of such components as twist drill, rotors of pumps, helical gears, etc. (Kim, Kubota & Yamanaka, 2008;Hwang & Chang, 2014;Bulzak & Pater, 2013).…”

Section: Introductionmentioning

confidence: 99%

New Extrusion Process for Producing Twist Drills Using Split Dies

Bulzak

Pater

Tomczak

2017

acs

Self Cite

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“…was solved by means of finite element method. In paper [5] the change in geometry of the mandrel end for production of welded elbows has been solved. Optimization of the mandrel end for production of 90° welded elbows lead to increased quality with less technological scrap while shortening the production time.…”

Section: Introductionmentioning

confidence: 99%

Influence of Die Geometry on Drawing Force in Cold Drawing of Steel Tubes Using Numerical Simulation

Bella¹,

Buĉek²,

Ridzoň³

et al. 2016

KEM

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In Železiarne Podbrezová, cold drawing process is the final process in production of precision seamless steel tubes. This particular technology utilizes multiple drawing sequences and intermediate annealing. From the physical point of view, it is nothing just the optimal use of plastic deformation during cold forming that grants the final tube dimensions. The drawing process itself is significantly affected by physical and metallurgical properties of the tube, the tool geometry, the lubrication, and the sequence of operations. This paper deals with the relationship between the tool geometry and the drawing force. The FEM-based numerical model of the process was prepared in DEFORM 3D in order to optimize the geometry of the die; eight die geometries were investigated in total. The numerical simulation itself considered a hot rolled hollow at Ø32 mm × 4 mm, cold drawn into Ø25 mm × 4 mm using die drawing (sinking) sequences only. Calculated drawing force showed that the change of the run-in angle of the die led to a decrease of the drawing force.

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“…With extrusion it is possible to obtain both uniform drills and their working part only which is most often welded to an appropriate kind of shank, depending on the need. The extrusion method can also be used to produce tri-spade drills, drills for concrete and enlarging drills [6].…”

Section: Introductionmentioning

confidence: 99%

Method for Producing Twist Drills by Extrusion Using a Three-Slide Forging Press

Bulzak

Tomczak

Pater

2014

KEM

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The study presents a new method, developed by the authors, for producing twist drills by extrusion using a three-slide forging press. The method consists in using two sectional dies with specially shaped impressions that allow the removal of a ready drill from the die without unscrewing. The study describes the main assumptions of the new method for twist drill extrusion, discussing benefits offered by this method when compared to the conventional process for producing twist drills by extrusion using a monolithic die. In order to verify the proposed solution, dies conforming to the assumptions of the new method were designed and executed. Experimental tests were conducted under laboratory conditions using a three-slide forging press. The model of the material used in the experiments was assigned the properties of Pb1 lead. As a result of the experiments, the theoretical assumptions of the new method could be examined and its practical application verified. Also, ideas for further research aimed at better understanding of the new technology for producing twist drills by extrusion are presented.

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Numerical Analysis of the Extrusion Process of Twist Drills

Cited by 3 publications

References 7 publications

New Extrusion Process for Producing Twist Drills Using Split Dies

New Extrusion Process for Producing Twist Drills Using Split Dies

Influence of Die Geometry on Drawing Force in Cold Drawing of Steel Tubes Using Numerical Simulation

Method for Producing Twist Drills by Extrusion Using a Three-Slide Forging Press

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