Non Conventional Machining Process Ppt ((top)) -

" This story follows a workshop supervisor, Elias, as he transitions from old-school methods to modern precision. The Story: The Evolution of the Invisible Edge

Slide 1: The Wall of HardnessElias stood in his workshop, staring at a block of super-alloy. His traditional steel drills and tungsten carbide cutters—the workhorses of his 30-year career—lay blunt on the bench. The material was simply too hard, too brittle, and the shapes required were too complex for any physical blade to touch. This is the "Need for Change".

Slide 2: Beyond the BladeElias realized that to conquer this material, he had to stop thinking about "cutting" and start thinking about "energy." He moved away from Conventional Machining—where tools physically grind against workpieces—and entered the world of Non-Conventional Machining (NCM). Here, there are no sharp metal edges; instead, we use mechanical, thermal, electrical, and chemical energy.

Slide 3: The Mechanical Sculptors (USM & WJM)First, Elias experimented with the Mechanical approach. He didn't use a drill bit; he used sound and water.

Ultrasonic Machining (USM): He used high-frequency vibrations to drive abrasive slurry into the material, chipping away microscopic pieces.

Water Jet Machining (WJM): He harnessed the power of a high-pressure water stream to slice through the alloy like a laser.

Slide 4: The Power of the Spark (EDM)Next, he looked at Thermal and Electrical methods. With Electrical Discharge Machining (EDM), Elias used controlled electric sparks to "melt" away the metal. There was no contact, meaning no mechanical stress on the delicate part.

Slide 5: The Chemical Ghost (CHM)Finally, Elias explored Chemical Machining. Instead of force, he used controlled etching to dissolve unwanted material. This allowed him to create complex patterns on surfaces that a physical tool could never reach. Non Conventional Machining Process Ppt

Slide 6: The New StandardBy the end of the project, Elias had achieved a level of accuracy and surface finish that his old drills could never match. While these modern methods were slower (lower material removal rate), they made the "impossible" parts for superalloys and carbides possible. Key Takeaways for Your PPT

Definition: NCM uses energy (thermal, chemical, etc.) instead of physical contact to remove material.

Why use it? It's essential for "hard-to-cut" materials like superalloys and complex geometries.

The Big Benefit: Extremely high precision and the ability to work with brittle or heat-sensitive materials. Introduction to Non-Traditional Machining - IIT Kanpur

Non-Conventional Machining Processes: Beyond the Cutting Tool

In the world of manufacturing, traditional machining—think drilling, turning, and milling—relies on physical contact and a tool that is harder than the workpiece. However, as industries like aerospace and electronics began using ultra-hard alloys and demanding microscopic precision, these "conventional" methods hit a wall. Enter Non-Conventional Machining Processes (NCMP) 1. What Makes Them "Non-Conventional"?

Unlike traditional methods that use mechanical force to "chip" away material, NCMPs use thermal, chemical, electrical, or high-velocity energy. No Tool-Workpiece Contact: In many cases, the "tool" never actually touches the part. Material Hardness: " This story follows a workshop supervisor, Elias,

The hardness of the workpiece doesn't matter. A soft copper wire can cut through hardened steel. Complex Geometries:

They can create intricate shapes, deep holes, and delicate parts that would snap under the pressure of a traditional drill bit. 2. The Big Four Categories

NCMPs are generally classified by the type of energy they use to remove material: Mechanical (Abrasive Jet, Ultrasonic):

These use high-velocity particles or vibrations. For example, Ultrasonic Machining (USM)

uses high-frequency vibrations to drive abrasive slurry into a part, making it perfect for brittle materials like glass and ceramics. Electrical (EDM): Electrical Discharge Machining

uses sparks to erode material. It’s the go-to for creating complex molds and dies in hardened steel. Chemical (CHM):

This involves controlled etching using chemicals. It’s often used to remove shallow layers of material from large surface areas, like aircraft wing panels. Thermal/Electro-Optical (Laser, Plasma, Electron Beam): These use intense heat to melt or vaporize material. Laser Beam Machining (LBM) Slide 13: Disadvantages & Limitations

is incredibly precise and can cut almost any material, regardless of conductivity. 3. Why Use Them?

The shift to non-conventional methods isn't just about being "high-tech"; it’s a necessity driven by three factors: Workpiece Fragility:

Traditional machining creates "residual stress" and heat that can warp thin or delicate parts. NCMPs are much "gentler" on the structure. Surface Finish:

Many of these processes provide a mirror-like finish that eliminates the need for secondary polishing. Automation:

Most NCMPs are CNC-controlled, allowing for extreme repeatability and minimal human error. 4. The Trade-offs

It’s not all perfect. Non-conventional processes are generally

(lower material removal rate) than a giant CNC mill. They also require high initial investment

and specialized power setups. Therefore, they are usually reserved for jobs where traditional machining simply fails. Conclusion

Non-conventional machining has redefined what is "manufacturable." By harnessing electricity, light, and sound, engineers can now work with the world's toughest materials to create the smallest, most complex components of our modern world. numbered slides with bullet points so you can copy them directly into a PowerPoint

Slide 6: Electrical Discharge Machining (EDM)

  • Principle: Controlled spark erosion between electrode and workpiece in dielectric fluid.
  • Two Types: Die-sinking EDM & Wire EDM.
  • Applications: Dies, molds, small holes (<0.1 mm).
  • Limitation: Only for conductive materials.

Slide 13: Disadvantages & Limitations

  • High initial cost (CNC EDM machine > $50k USD).
  • Low Material Removal Rate (compared to conventional turning).
  • Special skill required (parameter selection: voltage, frequency, gap).
  • Specific issues: Toxic dielectric disposal (EDM), abrasive waste (AWJM).

Slide 13: Future Trends

  • Hybrid processes: L-ECM, Laser-ultrasonic
  • Micro & Nano machining for MEMS/NEMS
  • Green machining: Waterjet with recycled abrasives
  • AI-assisted process control for EDM/LBM