Index Rotary Tables: Top Uses For These Machine Tool Accessories
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Rotary Index Tables (RITs) are special tools used for the accurate positioning and movement of workpieces during the milling process. Their applications scope is wide, but their working principle is focused around calculation of vertical intervals.
These rotating tables can be either manually operated or computer controlled, through a worm-screw that is fixed under the table and on to axial protrusions that turn the table clockwise or counter-clockwise for a complete 360 degrees turn. The maximum intervals number and indexing resolution depends on the worm-screw to table ratio.
Unique Milling Techniques
There is a very wide scope of possible uses for rotary index tables, and their various settings and configurations can deliver unique milling techniques that are only limited by the machinist's imagination. One of the most notable uses for the rotary index tables is as an alternative to an actual lathe machine. This can be done by using a chuck to hold the object, a tailstock to set the center of the milling process and an electric motor installed on the table's worm-screw.
Another thing that can be realized through the use of a RIT is bolt head processing. Machinists can calculate the desired intervals and configure their RIT to accommodate the milling of pentagonal or hexagonal indentations onto a bolt's head.
Cutting & Drilling Uses
Rotary Index Tables are also used for cutting arcs of high precision and variable curvature. Through the addition of a compound table, the machinist can freely change the position of the center of processing, thus creating a gradually opening or closing arc.
If you're using an underpowered milling machine that can't drive large drills for the creation of large diameter holes, then a rotary index table can be utilized to gradually open an initially small hole into a larger one at the same precision of one time drill. The most demanding metalworking process that requires high levels of precision and accuracy is the helical machining.
Helixes are basically curves in the three dimensional space and can only be achieved through the use of a rotary index table with the helix numerical characteristics being determined by the factors that affect the movement along the x, y and z axis. For this reason, movement along the x axis (helix step) must be ensured by through the use of a dividing head, or by mounting the rotary table on a fluctuating positioning rail.
Maybe the most common use of the rotary index tables though is the drilling of equidistant holes on a circular flange. Using the tool for this purpose is an easy and straight forward activity that is only requires the calculation of the intervals based on the number of holes and their center to center distance. By re-positioning the flange in off-centric holes, one can further drill each hole into a larger one.
These rotating tables can be either manually operated or computer controlled, through a worm-screw that is fixed under the table and on to axial protrusions that turn the table clockwise or counter-clockwise for a complete 360 degrees turn. The maximum intervals number and indexing resolution depends on the worm-screw to table ratio.
Unique Milling Techniques
There is a very wide scope of possible uses for rotary index tables, and their various settings and configurations can deliver unique milling techniques that are only limited by the machinist's imagination. One of the most notable uses for the rotary index tables is as an alternative to an actual lathe machine. This can be done by using a chuck to hold the object, a tailstock to set the center of the milling process and an electric motor installed on the table's worm-screw.
Another thing that can be realized through the use of a RIT is bolt head processing. Machinists can calculate the desired intervals and configure their RIT to accommodate the milling of pentagonal or hexagonal indentations onto a bolt's head.
Cutting & Drilling Uses
Rotary Index Tables are also used for cutting arcs of high precision and variable curvature. Through the addition of a compound table, the machinist can freely change the position of the center of processing, thus creating a gradually opening or closing arc.
If you're using an underpowered milling machine that can't drive large drills for the creation of large diameter holes, then a rotary index table can be utilized to gradually open an initially small hole into a larger one at the same precision of one time drill. The most demanding metalworking process that requires high levels of precision and accuracy is the helical machining.
Helixes are basically curves in the three dimensional space and can only be achieved through the use of a rotary index table with the helix numerical characteristics being determined by the factors that affect the movement along the x, y and z axis. For this reason, movement along the x axis (helix step) must be ensured by through the use of a dividing head, or by mounting the rotary table on a fluctuating positioning rail.
Maybe the most common use of the rotary index tables though is the drilling of equidistant holes on a circular flange. Using the tool for this purpose is an easy and straight forward activity that is only requires the calculation of the intervals based on the number of holes and their center to center distance. By re-positioning the flange in off-centric holes, one can further drill each hole into a larger one.
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