Types of Gauges in Measurement
→ Gauges are the inspection tools with or without scale that are used to check manufacturing parts. They do not indicate the actual value of the inspected dimension on the parts.→ They can only be used to determine whether the inspected part has been made within the specified limit or out of the specified limit.
→ A clear distinction between measuring instruments and parts or objects is not always observed, at that time Gauges are used largely for measuring work.
→ They are an important part of the Measurement System Analysis Study and mainly they are divided into two categories. (01) Standard (02) Non-Standard
[1] Standard:
→ If it is an exact copy of the mating part of the component to be checked, it is called Standard Gauge→ Widely used for checking the limit of the dimensions of the part, i.e lower limit and higher limit they are known as "Go" and "No-Go"
→ Examples: Ring, Plug, Thread gauge, etc....
[2] Non-Standard:
→ If it has no accurate standard measurement but it is made from some relative reference is called a non-standard gauge.→ Examples: Checking fixtures, Temples, etc...
Why Gauges are needed?
→ They are needed for the following reasons:→ Inter-changeability of parts.
→ Smooth Assembly.
→ Easiness in manufacturing
How to use Gauges?
→ Do not use it as a hammer, this will cause deformation.→ Avoid any hard/sharp object coming in contact with the gauges, this will cause a dent/scratches on the surface.
→ Do not force it inside the hole to be measured, this will cause fast wear and damage, Let the gauges enter the hole with its own weight.
→ After usage, grease/oil should be applied and kept at a proper place.
Examples of Gauges:
[01] Feeler:→ They are a bunch of fine thickened steel strips with a marked thickness which are used to measure gap width or clearance between the mating surface.
[02] Bore:
→ A bore gauge is used to calculate the hole size. It is analog or digital.
[03] Depth:
→ A depth gauge is used to measure the depth of a slot, hole or any other surface of an object. It can be of a scale, dial or digital type.
[04] Angle plate:
→ It is a right angle plate or tool used to measure the true right angle of two objects joined together.
[05] Dial or Dial Indicator:
→ The dial indicator is utilized in different tools as stated above and can be separately used to calculate the trueness of the circular object, bending of an object, etc.
[06] Thread pitch
→ A thread pitch gauge, also known as a screw pitch or pitch, is used to measure the pitch or lead of a screw thread.
[07] Gauge Block
→ It is also known as a slip gauge or Jo block and it is very precise.
→ It was Invented in 1896 by Swedish machinist Carl Edvard Johansson, they are used as a reference for the calibration of measuring equipment used in machine shops, such as micrometers, vernier, sine bars, calipers, and dial indicators(when used in an inspection role).
[08] Ring
→ A ring gauge is a cylindrical ring of steel whose inside diameter is finished as per tolerance and is used for checking the external diameter of a cylindrical object.
→ They are used for comparative gauging as well as for checking, calibrating, etc.
[09] Ruler and scales:
→ Rulers and scales are used to measure lengths and other geometrical parameters.
→ They can be a single steel plate or a flexible tape type.
[10] Vernier caliper:
→ Vernier caliper is a precision instrument used to measure a small distance with high accuracy.
→ It has got two different jaws to measure the outside and inside dimensions of an object.
→ It can be an analog or digital type of instrument. It is more accurate than the ruler or scale.
[11] Micrometer:
→ It is a fine precision tool that is used to measure small distances and is more accurate than the vernier caliper.
👉 See Also:
Where can the Presentations be downloaded from? On LinkedIn I see the presentations but on the website no.
ردحذفPresentation is also available on LinkedIn thanks!!!
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