Today's manufacturing requirements require deep hole processing solutions that are completely different from deep hole drilling (followed by a single-edge boring process, which usually has to be performed on other machine tools). It is pointed out that even on multi-task machine tools, a single clamp also needs this method. For example, to process a hole several meters deep, its aperture is about 100 mm, it must have a thread at one end, and the inner chamber deep into the hole has a larger diameter. Usually, when the drilling is completed, after the parts are moved to the lathe, these features are then added to the hole through the boring process. Now deep hole processing combines the ability of a tool to perform subsequent processes, and there are no machine tool adjustment restrictions. This new tool technology, on the contrary, broadens its operational capabilities, thus enabling more efficient processing of these demanding features within a smaller range of constraints.
An example of efficient feature processing using deep hole processing technology is petroleum exploration parts. This kind of part is about 2.5m long and has some complicated characteristics with small tolerance. To achieve small tolerances and good surface finish, the tool solution involves drilling holes with a diameter of 90 mm, and then finishing with floating reamers. Then reaming and reaming the 115mm diameter hole at the depth of 1.5m. Another partition enters the hole about halfway, then reaming and reaming are also carried out, and the processing is completed by chamfering. Finally, boring and reaming are carried out to form two inner chambers with chamfers (also reamed to finished size).
In conventional processing, it takes more than 30 hours to complete the part on the machine. The solution of deep hole processing with special tool can shorten the time to 7.5 hours.
Deep Hole Processing Off Center Line - Deep Hole Processing Manufacturers come to tell you:
Another example of the high requirement for cutting tools and application of proprietary technology in hole drilling is the processing of very deep holes in generator shafts of power plants. In this case, power generation industry experts must process 90 tons of forged steel parts in an asymmetric manner with the axis center line, with holes nearly 5.5 m long and diameters just over 100 mm. Such deep holes must be drilled at a certain angle, and the position tolerance at exit must be within 8 mm.
Drilling direction, chip breaking and removal, and absolute non-waste of the pre-processing shaft are critical for this application. The tool solution includes a dedicated bit and a new support plate. Drilling tests are needed before application on the axle, and the results show that it is more efficient and reliable - and the exit position is within 2.5mm of the target.
In many cases, the use of modern hole processing technology shows that the processing time is greatly shortened - from more than one hour to less than one hour - and that many complex features are machinable.
The parts for deep hole processing need to drill very deep holes first, and then are often processed with various complex features. Success in deep hole processing is usually based on the mixing of standard and special tool components, which have experience in designing non-standard tools.
In deep hole processing, small diameter holes less than 1 mm are machined with carbide gun drills, but for holes more than 15 mm, welding edge drills are generally used, while for holes more than 25 mm, indexable blade drills are used in single pipe system and Ejector dual pipe system to perform these processes very efficiently.
