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    Drill bits are cutting tools used to remove material to create holes over a cross-section. Drill bits are brake when they

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    31 views6 pages

    Fabrication, Characteristics and Analysis of Drill Bits Made of High HRC Materials

    Uploaded by

    International Journal of Innovative Science and Research Technology
    Drill bits are cutting tools used to remove material to create holes over a cross-section. Drill bits are brake when they

    Copyright:

    © All Rights Reserved
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    of 6

    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology

    ISSN No:-2456-2165

    Fabrication, Characteristics and Analysis of


    Drill Bits Made of High HRC Materials
    B. Ravi teja3, B. Ravikumar2, M. kurminaidu1
    Department of mechanical engineering, KITS warangal.

    Abstract:- Drill bits are cutting tools used to remove drilling process and as well as design parameters of drill bit.
    material to create holes over a cross-section. Drill bits are For the improve life span of drill bit, because drill bit can used
    brake when they can run at rated speed or rated load of in mass production. To increase life time of tool even little
    drilling machine [1]. Drill bits are in many sizes and shape amount, it is more beneficial to industrial applications.
    and can create different kinds of holes in many different Usually, the fabrication technology used for creating a self-
    materials. Many hard materials, such as carbides, are lubricant bushing, journal bearing and traction gear etc. But
    much more brittle than steel, and are far more subject to it allows us to prepare a new kind of alloy components,
    breaking.3D model can design with the help of CATIA V5 manufacturing of alloys by means of the conventional
    R20, this design can analysis in ANSYS [2] software and fabrication process. The material behavior and the enhance of
    in this 3type of materials can use, like high-speed steel, the machining process are completely different from the
    aluminium silicon carbide. After analysing the results in compare to the conventional processes with the design. some
    ANSYS and those results are comparing with each special characteristics are considered to enhance the drill bit
    material and conclude which is better suitable for the drill by powder metallurgical process. When a drill bit is made by
    bit that one will go to machining process to model. casting a porous elemental structure, a cutting condition
    Fabrication of twisted drill mix-up with 5-7 percentage of known as an intermittent-cutting parameters occurs
    cobalt with high-speed steel and aluminium silicon throughout machining, which significantly increases tool
    carbide. To compare the results of both of them, give the wear. Small chip particles that are always well but can form
    better results of twisted drill by wear and hardness of and become caught in the twist drill's flute. Cutting fluid
    materials. application is not advised since it can significantly increase
    corrosion because cutting fluids reside in the surfaces porous
    Keywords:- drill bit, CATIA, ANSYS. structure of the machined material. In-depth research into the
    machinability attributes is required in order to improve those
    I. INTRODUCTION materials' aforementioned undesirable characteristics. Only a
    few studies on this subject have been published in the
    In case, difficult-to-machine the work-piece materials, literature. Numerous journal information is available that
    such as sintered iron oxide based on powder metallurgy discuss green machining in mechanical alloying, and that
    steels, even now researchers can work on developing the might be a viable way to address machined surface issues.

    Abbreviations : HRC-hard Rockwell c type tool tip.


    Nomenclature of the HRC drill bits:

    Fig 1: Nomenclature of drill bit

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    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology
    ISSN No:-2456-2165
    II. PROCESS PARAMETERS III. DESIGN OF SPECIMEN ON CATIA

    Depth of cut: The depth of cut is defines the penetration of Start the CATIA, Image is arrange on the work region
    tool into the workpiece, when the tool do not distorted. of the system. Twofold tap on image, the item will open. The
    Feed: The rate that the penetrate propels into the material, for start-up screen will take after this.
    the most part estimated in remove material from work-space.
    Speed: The cutting space is typically estimated at the [2] CATIA V5 R20 was the software shape we used to
    outskirts of the drill on surface for every revolution per one display the spiral pump impeller. The object contains all of
    second. the modules that we must complete. Start, File, Edit, View,
    Thrust force: The force is exerted normal to cutting force by Insert, Toolbar, Window, and Help will all be
    the drill bit while the machining process. demonstrated.[6] We can start a new outline or update an
    Torque: torque is defined as the product of tangential force existing one based on your decision.
    acting on the shaft and radius of shaft.
    Surface Finish: The harshness of the dividers of the bored
    opening; a measure of the gap quality

    IV. ANALYSIS OF DRILL BIT IN ANSYS

    Analysis of design part in ANSYS imported from CATIA V5R20

    Fig 2: Maximum principal strain in the drill

    V. FABRICATION OF DRILL BIT

     Die casting process:


    Die casting is a metal casting method that involves pushing molten metal into a mold chamber under high pressure or gravity fluid
    force.[5] Because of the metal mold, the same mold may be used to make an endless number of castings, the procedure is also
    known as Permanent Mold Casting.

     Calculation:
    The size of the tool or specimen depends on shrinkage while the solidification of given material.
    Volume of drill bit after accomplishment of machining process

    Volume(V)=𝝅𝒓𝟐 h
    = 𝝅 ∗(12) 𝟐*130,
    =58810.61 mm^2

    Fig 3: fabrication of drill bit by casting process,

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    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology
    ISSN No:-2456-2165
    VI. DRILL POINT GRINDER times like takeoff and setup. Is appropriate for grinding drills
    with a diameter of 5 to 40 mm. A lathe machine (figure4)is
    A equipment called a drill point grinder removes extra simple to use and produces drills with improved accuracy and
    material from of the specimen. [9]This device can address the a higher surface polish. It handles every facet of polishing
    main issue with drilling. Tool tips can be shaped to the desired drill points. [4] a fine point that provides excellent accuracy.
    shape using a grinding machine. There are certain portable Precision drill bits provide holes with a superior quality and
    grinding machines on the market that can shorten machining that are truly round, properly centred, and symmetrical.

    Fig 4: machining of drill bit on lathe machine

    Fig 5: High speed steel after machining process

    Fig 6: aluminium silicon carbide after machining process

    VII. RESULTS AND DISCUSSION

    Hardness of material

    Si no Force (N) Diameter (d1=mm) Diameter (d2=mm) Vickers number


    1 20 3 2.75 4.486
    2 30 3.45 3.15 5.107

    aluminum
    5.5
    hardness

    5
    4.5
    4
    20 30
    LOAD

    aluminum

    Fig 7: Hardness of aluminum silicon carbide

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    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology
    ISSN No:-2456-2165
    Calculation of hardness:
    Hardness of materials are calculated by vickers number test
    HV= 1.854(force/dia^2).
    Where dia^2= area of the indentation.

    Si no Force (N) Diameter (d1=mm) Diameter (d2=mm) Vickers number


    1 20 3 2.65 4.623
    2 30 3.25 3.20 5.347

    HSS
    6
    hardness

    5
    4
    20 30
    LOAD

    HSS

    Fig 8: Hardness of high-speed steel

    Chart Title
    5.5
    hardness

    5
    4.5
    4
    20 30
    LOAD

    aluminum HSS

    Fig 9: comparison of hardness aluminum silicon carbide with the HSS

    Wear rate
    High speed steel:

    Si no Load Time Speed (RPM) Sliding distance Initial weight Final wight
    (N) (min) (m) (grams) (grams)
    1 10 5 900 1000 17.54 17.51
    2 20 5 1000 900 17.51 17.46

    0.6 0.525
    0.5
    SPECIFIC WEAR

    0.4
    0.4
    0.3
    0.2
    0.1
    0
    10 20
    LOAD

    Fig 10: Specific wear rate of high speed steel

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    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology
    ISSN No:-2456-2165
    Specific wear rate of drill bit:

    Si no Load Time (min) Speed (RPM) Sliding distance (m) Initial weight Final wight
    (N) (grams) (grams)
    1 10 5 900 1000 16.67 16.65
    2 20 5 1000 900 16.65 16.62

    Fig 11: Specific wear rate of aluminum silicon carbide

    Chart Title
    0.6 0.525
    SPECIFIC WEAR

    0.4
    0.4 0.33
    0.2
    0.2

    0
    10 20
    LOAD

    aluminum HSS

    Fig 12: Comparison between aluminum silicon carbide and HSS

    The hardest material shows the lowest material remove rate from the specimen. The specimen, which have hard property shows
    the high compressive strength.

    VIII. CONCLUSION REFERENCES

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    Volume 7, Issue 6, June – 2022 International Journal of Innovative Science and Research Technology
    ISSN No:-2456-2165
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