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Knob Testing Fixture
 

Knob Testing Fixture

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For Mechanical Testing like Flexivity /

For Mechanical Testing like Flexivity /

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    Knob Testing Fixture Knob Testing Fixture Presentation Transcript

    • Presented By:-
      VASUDEVANAND VINAYAK NANCHE
      V.J.T.I. Mumbai/ J.N.V. Sindhudurg
      Guided By:-
      Mr. MoKhan
      L&T Powai.
    • M/S LARSEN & TOUBRO,
      POWAI - 400072
      Electrical & Electronics Business Group (EBG)
      Dept : Switchgear Quality Control & Reliability (SQR)
    • Project
      Fixture for flexivity testing
      of plastic components
      i. e. Knobs used in all types of MCCB
      By – Vasudevanand Nanche
      SQR-QA
    • Fixture for flexivity testing of MCCB Knobs
      Synopsis:-
      • What is fixture & flexivity?
      • Need for fixture.
      • Testing Components.
      • Testing Machine.
      • Temporary Arrangement.
      • Disadvantage of Temporary arrangement
      • Working principle of the Fixture.
      • Design of fixture.
      • Advantages of the Fixture.
    • Fixture for flexivity testing of MCCB Knobs
      • Fixture is the device that locates & holds component while testing.
      • Flexivity refers to the absolute range of movement.
      • It is the ability to flex or bend the component within a specified limit.
    • Fixture for flexivity testing of MCCB Knobs
      Need for designing the fixture
      • Requirement for permanent fixture on UTM
      • Advantage over temporary arrangements
      • Load Vs Displacement values
      • Regular testing
    • Fixture for flexivity testing of MCCB Knobs
      Testing Components:-
    • Fixture for flexivity testing of MCCB Knobs
      Testing Machine :-
      Ram
      [Place for Fixture]
      UNIVERSAL
      TESTING
      MACHINE
      [ UTM ]
    • Fixture for flexivity testing of MCCB Knobs
      Temporary Arrangement:-
    • Fixture for flexivity testing of MCCB Knobs
      Disadvantages of the Arrangement:-
      • Load Vs Displacement values are vary; because the clearance present is more.
      • Diff-diff arrangements are required for all types.
      • Time consuming test.
    • Fixture for flexivity testing of MCCB Knobs
      Polarity Testing Setup
      Working Principle
      Component is fixed from one side (as in case of breaker) & allowed to bend from another side so that load is applied vertically at extended part of Knob.
      Here, the contact occurs between tool & component is line contact.
      Hence, we have designed the fixture in such a way that, as the load is increasing, the plastic Knob tends to bend downwards proportionally & we can get the accurate values for
      Load Vs Displacement.
    • Fixture for flexivity testing of MCCB Knobs
      Design of fixture:-
      Guiding System
      Vice Pin
      (Moving)
      Bush
      Pin
      Rod
      (Fixed)
      Vice Moving Part
      Knurled at Lower Surface
      Vice Main Body
      (Moving)
      Base
      (Fixed on Ram)
    • Fixture for flexivity testing of MCCB Knobs
      Advantages of the Fixture:-
      • Flexivity i. e. load Vs Displacement values of the Knob can be accurately found out.
      • Used for all the types of MCCB i. e. Multi purpose.
      • Save time for testing.
      • Safe & easy to use.
      • Design to have long life.
      • Proper utilization of the facility available.
    • Thank You !