At the beginning of the 20th century, drilling and milling machines were still using conventional relays for feed rates worldwide. In the 1970s and 1980s, foreign companies such as ELDORADO's MEGA50, German TBT's T30-3-250, NAGEL's B4-H30-C/L, and Japan's Shinzaki Precision Manufacturing Institute's DEG type drilling and milling machines that entered China were all operated by relays. In the mid to late 1980s, due to the emergence of CNC machining technology, it gradually began to be used on CNC drilling machines, especially after 92 years when such modern technology was promoted. In the early 1990s, TBT Corporation launched the ML series CNC drilling machine, which used AC servo motor to drive the ball screw pair instead of the mechanical equipment stepless gearbox. In addition to using a rolling linear guide rail for the sliding table guide rail for the feed rate, the rotation of the drill pipe box ensured better high-speed operation and precision stability. The stepwise rotation of the exchange belt pulley and transmission belt, as well as the dual speed motor drive program, was transformed into a variable frequency motor with infinite speed control to drive the high-speed electric spindle program. This created a resource advantage for milling holes in CNC gantry drilling machines and improving the water quality of CNC drilling machines. In order to better produce and process oblique holes, vertical line holes, or flat holes that intersect or are in any direction on some components, or are in corresponding directions with the axis of the production and processing components, various countries need to develop and design a variety of specialized CNC drilling machines. For example, in order to better produce and process the oil port on the engine crankshaft, the inclined oil port on the crankshaft connecting rod, the flat hole, and many axial discharge holes on the grain machinery feeding mold, the profession. The BW 250-KW CNC drilling machine is particularly suitable for the crankshaft oil port of large, medium, and small truck engines, and they all have X, Y, Z, and W four axis CNC machine tools. In order to better meet the needs of customers, a production line can produce and process various types of engine crankshaft oil ports. In 2000, a flexible shaft machining center was designed and produced, which can produce and process all oil ports on different engine crankshafts of cylinders 2-12. MOLLART Enterprise is a specialized CNC drilling machine developed and designed for the production and processing of particle extrusion molds. It has six equally divided machine tool spindles and simultaneously produces and processes six holes on the same product workpiece. The total number of workpiece holes in this product can reach 36000. All are controlled by the system in CNC machine tools.
2、 Specific benefits
A drilling and milling machine is a practical CNC machine tool with universal main applications, which can produce and process parts such as drilling, reaming, boring, spot facing, and threading. When equipped with processing equipment on the drilling and milling machine, it can also perform precision boring with feed rate. When equipped with an operating platform on the drilling and milling machine, it can also perform drilling, milling, and boring with feed rate.
