Metal cutting

Metal Cutting is a fundamental manufacturing process in which material is removed from a metal workpiece in the form of chips to achieve a desired shape, size, and surface finish.

Key Elements of Metal Cutting:

  • Workpiece: The material being machined (usually metal).

  • Cutting Tool: A harder material used to shear off the metal.

  • Machine Tool: The device (e.g., lathe, milling machine) that provides motion between the tool and the workpiece.


PERFOM SMAW ON MILDSTEEL

This course provides students with both theoretical knowledge and practical skills required to perform Shielded Metal Arc Welding (SMAW) on mild steel effectively and safely in various applications. The focus is on understanding the properties of mild steel, welding tools and equipment, electrode selection, and step-by-step welding techniques.

ASSEMBLE ALUMINIUM PROFILES

This course provides students with both theoretical knowledge and practical skills required to assemble aluminum profiles effectively and safely in various applications. The focus is on understanding the properties of aluminum profiles, required tools, connection methods, and step-by-step assembly techniques.

Oxy-Acetylene gas welding on mild steel

Oxy-acetylene gas welding is a fusion welding process that uses a flame produced by burning acetylene (C₂H₂) with oxygen (O₂) to melt and join metals.

2. Equipment Used:

  • Oxygen cylinder (black)

  • Acetylene cylinder (maroon)

  • Pressure regulators

  • Hoses (red for acetylene, blue for oxygen)

  • Welding torch

  • Welding tips/nozzles

  • Spark lighter

  • Protective gear (goggles, gloves, apron)

3. Types of Flames:

  • Neutral flame (1:1 ratio of oxygen and acetylene) – used for most welding.

  • Carburizing flame (excess acetylene) – used for welding high-carbon steels and non-ferrous metals.

  • Oxidizing flame (excess oxygen) – used for brass, bronze, and certain steels.

4. Advantages:

  • Portable and versatile.

  • Low initial equipment cost.

  • Suitable for welding, cutting, brazing, and heating.

  • Ideal for thin metal sheets and maintenance work.

5. Disadvantages:

  • Not suitable for welding thick sections.

  • Slower than arc welding.

  • Generates lower temperatures.

  • Fire and explosion risks due to combustible gases.

6. Applications:

  • Sheet metal work

  • Automobile repairs

  • Plumbing and refrigeration

  • Metal sculpture and art

7. Safety Precautions:

  • Check for leaks before use.

  • Use in well-ventilated areas.

  • Never use oil or grease on regulators or fittings.

  • Keep cylinders upright and secured.

  • Follow correct lighting and shutdown procedures.