Applications, Advantages, and Disadvantages of Abrasive Jet Machining (AJM)
Read: Abrasive Jet Machining (AJM) working principle and process parameters
Applications of abrasive jet machining
- AJM is suitable for machining heat sensitive material like silicon, gallium because the heat generation during the machining is very low.
- Ajm can be used for cleaning purposes. Removal of oxides on metal, smears on ceramics, and other resistive coating on work material (e.g., insulator stripping and cleaning of wire).
- For removal of parting lines from injection moulded parts.
- AJM is useful in deburring of plastic, cutting of metallic foils, machining of super alloys and refractory materials.
- Frosting (roughened matte finish) of shiny material
- They are used for machining of thin, brittle, fragile materials like germanium because of low overall force.
- To engraving permanent mark on the material.
- Deburring of small precision parts that required a burr free finish such as medical appliances, hydraulic valves, aircraft fuel system.
- Micro grit blasting, Trimming and bevelling.
- It is the best method for deburring small milled slots in hard metallic components, small hole like in hypodermic needles and cavities inaccessible by other means.
- Polishing of nylon and Teflon components.
Advantages and Limitations of abrasive jet machining
- The process is free from chatter and vibration as there is no contact between the tool (nozzle) and work material.
- Do not cause hardening of workpiece material.
- Very little or no heat generation during the cutting process, so it is suited for machining of heat sensitive material.
- High surface finish can be obtained by choosing a suitable abrasive material with a size that is suitable for the requirement.
- In case of damage, the depth of damage is very small (less than 3 microns).
- Thin sections of brittle and hard material like ceramic, glass, and germanium can be machined.
- It can be used for drill holes of intricate shape. It is used for machining cavities which are inaccessible by other methods.
- Low capital cost and ease of operation.
- The material removal rate is low.
- The process tends to environmental pollution. A dust collection system must be provided to avoid air pollution and health hazards. This can be eliminated by using abrasive water jet machining.
- The abrasive powder cannot be reused because its cutting ability decrease and it may clog on orifice of the nozzle.
- Higher chance of stray cutting. Tapering may occur during drilling.
- AJM not suited for machining of soft material because the abrasive may get embedded in the work material.
- Nozzle life is low (300hr), and short standoff distance causes frequent damages on the nozzle.
- The air used for abrasive jet must be moister and oil free.
🔗Ultrasonic machining USM - Applications advantages and disadvantages
🔗Electron beam machining EBM applications, advantages and aisadvantages