How to optimize the control of coolant in the high-pressure cooling system of deep hole drilling

Release time:

2022-06-26

The deep hole drilling high-pressure cooling system is very important to the deep hole drilling process. Today's advanced deep hole drilling high-pressure cooling system controls the coolant in roughly the same way as the machine spindle or shaft.

Deep hole drilling high pressure cooling system is very important to the deep hole drilling process, today's advancedHigh pressure cooling system for deep hole drillingThe coolant is controlled in much the same way as the machine spindle or shaft is controlled. Careful management of cooling water pressure, filters, temperature and flow is key to optimizing the deep hole drilling process. To this end, a programmable flow-based variable speed control function needs to be integrated into the deep hole drill bit. Make the system have the necessary adjustment capabilities to ensure that the pressure of the deep hole drilling high-pressure cooling system does not exceed the pressure required for effective debris and precise drilling.

For many years, in addition to the large flood type, the advanced cooling water transportation system is the main shaft/tool through the cooling water system. Then, the advent of high-pressure cooling water systems operating at pressures above about 1,000pa has made the field of cooling water technology, especially cooling water technology in most regular processing operations, particularly effective and more efficient for chips. Drilling applications, primarily those using twist drills, are a major driving force behind the development of high-pressure cooling water systems. In particular, deep hole drilling applications generally have a mood above 10:1.

Original equipment manufacturers of deep hole drills (such as UNISIG) design methods to control cooling water systems (such as systems) and mechanical design to achieve integration and performance consistency.

However, as the pressure of the cooling water increases, proper filtration and temperature control are required. When considering systems above 1,000 psi, in order to prevent pump failure, 20 to 50 levels of filtration are required. In most cases, high-pressure cooling water systems require a cooler to regulate the cooling water temperature. Most companies stop using these systems, but even in demanding drilling applications, filtration and coolant alone cannot solve one of the important variables in the use of high-pressure coolant, flow.

Stores usually do not know how much coolant the system needs to transport or transport. For example, depending on the system, a typical overflow cooling water system provides a flow rate of about 10 gpm to about 40 gpm. However, as the hole diameter increases or deepens, the drilling operation requires a larger volume. For example, when using a large spray gun or BTA tool, the cooling water flow rate required for a hole with a diameter of 10 to 12 inches (25.4 to 30.5cm) is in the range of 50 gallons per minute to 75 to 350 gallons per minute. A deeper diameter hole may only need 2 gpm, but the pressure level is much higher. For example, a hole with a diameter of 0.040 inches (1.016mm) may require a coolant pressure of up to 3,000pa.

Because the exponential factor is included, the area/metal removal will increase significantly with a slight increase in the hole diameter. Consider the difference between a 1 inch (25.4mm) diameter hole and a 1.5 inch (38.1mm) diameter hole. In other words, the diameter is increased by 50%. The result area for 1 hole is 0.79 in3(12.95 cm3), and the result for 1.5 inch holes is increased by 100 to 1.77 in3(29.01 cm3). Increasing the hole diameter from 1 to 2 means that the area is increased by 4 times, and the material extracted from the hole is also increased by 4 times. In other words, the workshop must assume that even if the aperture is slightly increased, the change of cooling water parameters can be guaranteed. Nevertheless, most cooling water systems offer little flexibility. For example, manyHigh pressure cooling system for deep hole drillingThere is no flexibility at all, in other words, the cooling water is on or off. Spindle through cooling water systems can include relief settings or M-codes that provide low, medium and high pressure settings, but these settings are not sufficient for plants that actually need to optimize cooling water delivery.

Infinitely variable input coolant control. This technology allows the shop to drill holes at a pressure of 400 psi, and then as the drill bit deepens further, it is increased to the level required to maintain an effective chip velocity. But this is the difficult process of manual dialing. If the flow rate is too low, debris will stay in the hole and eventually damage the drill bit. Excessive flow will produce excessive pressure, produce unnecessary force, and interfere with drilling accuracy.