Effects of End Mill Helix Angle on Accuracy for Machining Thin-Rib Aerospace Component

Izamshah, R.; Yuhazri, M. Y.; Hadzley, Mohd; Ali, Mohd Amran; Sivarao, Subramonian

doi:10.4028/www.scientific.net/amm.315.773

Cited by 36 publications

(13 citation statements)

References 7 publications

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“…Figures 2 and 3 show the end mill geometrical terminology and the cutting angles respectively. Rake angle can have a significant effect on the cutting forces, stress distribution, chip deformation, cutting edge stiffness and rigidity of the tool (Izamshah, Yuhazri, Hadzley, Ali, & Subramonian, 2013). An end mill with a positive rake angle will improve machinability, thereby producing a lesser cutting force and cutting temperature.…”

Section: End Mill Geometrical Featuresmentioning

confidence: 99%

Effects of Cutter Geometrical Features on Machining Polyetheretherketones (PEEK) Engineering Plastic

Izamshah

Nawawi²,

Loh³

et al. 2014

J MECH ENG SCI

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When polyetheretherketone is used in structural applications it generally undergoes additional machining operations in order to form components. Machining PEEK can be a challenging task for manufacturers, however, especially when using a conventional cutting tool. This paper deals with the influence of a cutter's geometrical features when machining polyetheretherketones engineering plastic on their machining performances. Three categories of end mills were designed and fabricated with varying rake angles, clearance angles and helix angles to investigate effects on machining surface roughness and burr formation. From the investigations conducted, it is evident that end mill geometrical features (rake angle, clearance angle and helix angle) have significant effects on machining surface roughness and burr formation. Increasing the rake angle and helix angle value will improved the machining surface roughness, however, in the case of varying clearance angles, there are no significant results for the surface roughness produced. It could be observed, however, that a 12° clearance angle produced better surface roughness compared to other angles. The findings from the deliberately conducted experiments can be used for the development of high performance cutting tools, especially for machining polyetheretherketones engineering plastic material.

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Section: End Mill Geometrical Featuresmentioning

confidence: 99%

Effects of Cutter Geometrical Features on Machining Polyetheretherketones (PEEK) Engineering Plastic

Izamshah

Nawawi²,

Loh³

et al. 2014

J MECH ENG SCI

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“…Można go znaleźć w konstrukcji elementów nośnych samolotów, np. : wręg, podłużnic i dźwigarów kadłuba oraz skrzydeł [1][2][3]6].…”

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The effect of the cutting edge helix angle of the cutter on the cutting force components and vibration acceleration amplitude

et al. 2017

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Wpływ kąta pochylenia krawędzi skrawającej frezu na składowe siły skrawania i amplitudy przyspieszenia drgań The influence of the cutting edge helix angle of the end milling cutter on the cutting force components and vibration acceleration amplitude in the workpiece coordinate system was determined during the high performance milling of aluminum alloy using the cutter with a corrugated cutting edge.

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Section: Introductionmentioning

confidence: 99%

“…A special advantage of EDM die-sinking offers compared to conventional machine where materials removed without any contact between electrode and workpiece. As a result, problems of vibration and mechanical stress can be eliminated during machining process [7].Even though, the use of die-sinking EDM focused on the cutting material having conductivity of an electric, the process capability of cutting alloys materials, becomes more challenges regardless of their hardness and toughness [8]. The most advantage of EDM die-sinking machine is that it can cut electrical conductivity material, free from burrs especially for stamping die that can be produced by EDM die-sinking with accurate dimension, low cost and fast processes [9].…”

mentioning

confidence: 99%

The Performance of Brass Electrode on Material Removal for Aluminium Composite in EDM Die-Sinking

Mohd

Laily

Fatin

et al. 2014

AMM

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Abstract. This paper investigates the performance of brass electrode on the removal of aluminium alloys LM6 (Al-Sil2) in an electrical discharge machining (EDM) die-sinking. The machining parameters such as pulse-on time, pulse-off time and peak current were selected to find the responses on the material characteristics such as material removal rate (MRR), electrode wear rate (EWR) and surface roughness (Ra). Brass with diameter of 10mm was chosen as an electrode. Orthogonal array of Taguchi method was used to develop experimental matrix and to optimize the MRR, EWR and Ra. It is found that the current is the most significantly affected the MRR, EWR and Ra while pulse on time, pulse off time and voltage are less significant factor that affected the responses. Percentage optimum value of MRR increases to 3.99%, however EWR and Ra reduce to 3.10% and 2.48% respectively. Thus, it shows that brass having capability to cut aluminium alloys LM6. IntroductionBrass is one of the electrical conductive materials. Today, however, brass is seldom used as an electrode in EDM die sinking due to its high wear rate but it still good for machining materials for high speed small hole machines because it exhibits higher degree of stiffness and easier to machine than copper [1]. Even though, brass already used as an electrode but it is still not tested for cutting aluminium alloys LM6. It is known that LM6 which aluminium containing 12% silicon has good resistance to corrosion and excellent cast ability [2]. It is widely used in many fabrication devices due to its characteristics properties such as applications for motor housings, manifolds, marine components and pumping cases. Further, LM6 is also appropriate where sometimes castings require to be welded.Usually in die tooling, when materials used is hard, it becomes better for die tooling, however it would be difficult to cutting using conventional cutting tools [3]. Therefore, some others electrode materials were tested against the aluminium alloys LM6 like copper tungsten [4], copper [5] and graphite [6] which has yielded a good experimental result. A special advantage of EDM die-sinking offers compared to conventional machine where materials removed without any contact between electrode and workpiece. As a result, problems of vibration and mechanical stress can be eliminated during machining process [7].Even though, the use of die-sinking EDM focused on the cutting material having conductivity of an electric, the process capability of cutting alloys materials, becomes more challenges regardless of their hardness and toughness [8]. The most advantage of EDM die-sinking machine is that it can cut electrical conductivity material, free from burrs especially for stamping die that can be produced by EDM die-sinking with accurate dimension, low cost and fast processes [9].

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Effects of End Mill Helix Angle on Accuracy for Machining Thin-Rib Aerospace Component

Cited by 36 publications

References 7 publications

Effects of Cutter Geometrical Features on Machining Polyetheretherketones (PEEK) Engineering Plastic

Effects of Cutter Geometrical Features on Machining Polyetheretherketones (PEEK) Engineering Plastic

The effect of the cutting edge helix angle of the cutter on the cutting force components and vibration acceleration amplitude

The Performance of Brass Electrode on Material Removal for Aluminium Composite in EDM Die-Sinking

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