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Coordinate boring machines, sometimes referred to as “jig borers”, are specialized machine tools used for a variety of diverse machining processes that require precision boring on both large and small components. Developed during the mid-20th century, coordinate boring machines are used in several different industries, ranging from aerospace and aviation to transportation and creation of safety-sensitive automotive parts. Coordinate boring machines measure hole locations using programmed numerical data and the components they produce are often used in roles of critical importance.
These machine tools feature a variety of spindles that drive a cutting tool either tangentially or axially. The spindle is housed in a quill which typically contains a coolant feed, and is adjustable to allow the spindle to assume various angles and reach various depths. The quill is also spring loaded to allow for heavy loads above what the spindle can upusually handle. Generally, these machines have a bed table, along with an X and Y axis with a rotary table, allowing for a C axis.
Every component within a coordinate boring machine is manufactured, machined, and tested to an extraordinarily stringent standard. Spindles, bearings, gears and the sheath are all specially crafted so as to guarantee the highest levels of accuracy and repeatability. These machines can achieve repeatability at a rate of 0.012mm, which is considered to be spectacularly accurate.
The spindle of a coordinate boring machine is usually connected to a programming control, allowing for a variety of automated scenarios that would create efficiency while adhering to a high degree of accuracy. The spindle is often connected to a variety of sensors that accurately measure spindle speed, or a “tachometer”, as well as amplitudes of vibration and spindle feed rates.
Once production is in full swing, the coordinate boring machine can use these measurements to periodically adjust itself and ensure the highest levels of accuracy. For example, if the spindle goes faster or slower than programmed, the machine will monitor this and adjust accordingly.
When buying a coordinate boring machine, it’s best to find a reputable dealer who can provide a detailed demonstration of the operation of the machine. As these machines are tested for accuracy prior to dispatch, it’s also important to ensure that your machine’s accuracy rating matches the standards set out in your brief.
Thanks to its astonishing levels of accuracy, a coordinate boring machine can be used for a huge variety of purposes. Furthermore, its consistent performance levels provides a cost-effective solution for many mass-manufacturing products. It’s a great choice for a variety of processes, including honing, milling, grinding and drilling. A coordinate boring machine can also be used to perform intricate machining operations that require an extreme level of precision.
Due to its many applications, coordinate boring machines are in high demand. There are several leading manufacturers that produce various models of coordinate boring machines, each of which offer unique features and price points. Be sure to do thorough research prior to buying, as there are a number of important factors to consider.
