Seminar On High Speed Machining (HSM) Report Download
- Rough machining and semi-finishing of the material
- Heat treatment to achieve the final required hardness
- Machining of electrodes and electrical discharge machining of specific parts of the dies or moulds
- Finishing and super finishing of surfaces
Actually there are many different ways to define HSM, upon them HSM is said to be,
- Major advantages of HSM are high material removal rates, the reduction in lead times, low cutting forces, dissipation of heat with chip removal resulting in decrease in work piece distortion and increase part precision and surface finish.
- Low cutting force gives a small and consistent tool deflection. This in combination with a constant stock for each operation and tool is one of the prerequisites for a highly productive and safe process.
- Cutting tool and work piece temperature are kept low which gives a prolonged tool life in many cases.
- Die casting dies: This is an area where HSM can be utilized in a productive way as most castings dies are made of demanding tool steels and have a moderate or small size.
- Forging dies: Most forging dies are suitable for HSM due to their complex shape. The surface is very hard and often prone cracks.
- Injection moulds and blow moulds: These are also suitable for HSM, because of their small sizes. This makes it economical to perform all operations in one step.
- Milling of electrodes in graphite and copper: It is an excellent area for HSM. Graphite can be machined in a productive way with Ti(C,N) or diamond coated solid carbide end mills.
- Modeling and prototyping of dies and moulds: This is one of the earliest areas for HSM. Easy to machine materials such as aluminum are used. The cutting speeds are often as high as 15000-50000 rpm and the feeds are also very high.
Comparison between conventional machining and HSM process:
time between the cutting edge and work piece is large
between the cutting edge and work piece is short
is not required
removal rate is low
removal rate is high
- HSM is not simply high cutting speed. It should be regarded as a process where the operations are performed with very specific methods and production equipment.
- HSM is not necessarily high spindle speed machining. Many HSM applications are performed with moderate spindle speeds and large sized cutters.
- HSM is performed in finishing in hardened steel with high speeds and feeds often with 4-6 times conventional cutting data.
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