In some turning operations, the diameter of the workpiece changes so the spindle speed (RPM) and cutting speed (SFM) can not both remain constant. Constant RPM will cause the cutting speed to decrease as the tool moves towards the center of the workpiece. In order to maintain constant SFM, the RPM ...
Tooling for molding or casting processes that is quickly manufactured through high speed machining of aluminum or soft steel, or by using additive fabrication techniques, such as FDM or DMLS. Rapid tooling is often used in low volume production, where low cost tooling greatly reduces the part cost ...
Die casting machines can be classified as one of two types – a hot chamber or a cold chamber machine. Hot chamber machines are used for alloys with low melting temperatures, such as zinc. Cold chamber machines are required for alloys with high melting temperatures, such as aluminum, and have longer ...
The time that is required for one complete cycle of a manufacturing process. Typically, the cycle time is the time required to produce a single part. However, many processes allow for the production of multiple parts per cycle. For example, a mold may contain multiple cavities or machining can be ...
The power required from a machine's motor to rotate the spindle during a machining operation. The spindle horsepower will typically be less than the machine's motor horsepower due to the machine efficiency being less than 100%. The motor horsepower required for any operation must be less than the ...
The amount of shear stress a material can sustain, measured in units of force per unit area. Shear strength is commonly expressed as megapascals (MPa) or pounds per square inch (psi) of original cross section. The maximum shear stress that a material can withstand before eventually failing is ...
The amount of time required for all machines in use to manufacture the production quantity of parts. The production time includes time when the machines are running (run time or uptime) and when they are down for maintenance or other tasks (down time). The production time does not include any setup ...
Abbreviated CTE for Coefficient of Thermal Expansion. The change in length per unit length, area per unit area, or volume per unit volume for each degree change in temperature. Typical units for linear CTE are cm/cm°C or in/in°F, or expressed as millionths of unit length change per unit length per ...
