Coordinate Measuring Machine Restraint Fixture Calibration for Thermoplastic Assemblies
Calibrate CMM restraint fixtures by matching datum locators to nominal CAD and regulating clamping forces to eliminate non-rigid part deflection.
6061-T6 Aluminium
Meaning
Structural grade precipitation-hardened alloy contains magnesium and silicon as its primary alloying elements. Rapid heat transfer is a primary benefit when 6061-t6 aluminium is selected for prototype injection mould bases or cavities. High thermal conductivity reduces cycle times compared to tool steel alternatives.
Structural Stiffness
Mechanical stability remains high because the artificial aging process optimizes the grain structure for tension and compression. While 6061-t6 aluminium lacks the extreme surface hardness of hardened steels, it maintains sufficient rigidity for low volume production runs of polyolefins or soft elastomers. Stiffness values around 68.9 gigapascals ensure the tool resists deformation under standard injection pressures.
Machining Efficiency
High removal rates characterize the fabrication of mould components from this alloy. Because 6061-t6 aluminium produces small chips and resists built-up edge formation, CNC milling operations proceed faster than with stainless steel. Speed in the toolroom translates to shorter lead times for first article inspections.
Polishing time also decreases because the metal accepts a high quality finish with minimal manual effort. High spindle speeds and aggressive feed rates are sustainable throughout the roughing and finishing passes. This material allows for complex internal geometries and deep ribs to be cut without excessive tool deflection or breakage.
Tooling Application
Surface treatments such as hard coat anodizing extend the functional life of the cavity faces. Although 6061-t6 aluminium is susceptible to abrasive wear from glass-filled resins, a nickel coating can mitigate this risk. The metal functions as a cost effective choice for bridge tooling.