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Posted on Mar 25, 2020
Since the invention of the lathe, the milling machine can be regarded as the second greatest machining machine that changes the way of human life. In the design idea of the milling machine, the spindles for milling that clamps the cutting tool is very convenient for processing. Because of this design, the workpiece can remain stationary, and the cutting process is different from turning which is performed by milling spindles.
There are many variables and specifications that determine the performance of the milling ability, and one of them is speed of spindles. The speed of CNC mill spindle is a key parameter that determines the performance of the machining center. For high speed milling spindles, the RPM (revolutions per minute) standard is different, and there is no such universal range. On the other hand, manufacturers in Europe, Japan and Taiwan have a consensus on RPM standards of spindle for milling, while regional differences are still very large. Therefore, in the field of metal processing, turning and milling machines are also called CNC turning centers. This is a machine tool with both turning and milling functions, and with the help of a turret unit and corresponding supporting accessories, the workpiece is rotated on a rotary axis to perform various machining operations, such as cutting and turning.
Here, everything discussed above is best processed with a turret tool, that is applied to the workpiece and creates an object symmetrical to the spindle, which is driven by the spindle and assisted by the active tool. Since all tools are prepared for the workpiece, the clamping mechanism of the workpiece is another key point for milling and turning. Compared with the horizontal method, the clamping mechanism is more secure and fixed due to gravity. Manufacturers of vertical lathes usually turn their vertical lathes into first-class manufacturing facilities for users in a variety of industrial sectors that pursue for high precision, such as automotive industry, aerospace sector, sport equipment application, and other fields with larger size work pieces and stuff.
With the passage of time, people rely heavily on the machining capabilities of milling machines, and this trend is getting stronger. Like other machining center models, when it comes to CNC turning and milling machines, this type of machining center is one of the very common and highly productive machine tools suitable for heavy cutting tasks in the industrial fields of aviation, automotive, and energy production. In the model inventory, the turret type CNC turning and milling machine is a highly developed machine tool that can handle multiple milling tasks by spindles at once. Initially, the machine tool center evolved from milling machines in the 1960s. The development of this particular type of machine tool has made good progress in the industry. Since then, the machine tool center has been widely used in various industries and has commercial value.
Read More: Milling Machine & Machining Center
The machine tool spindle is one of the important components of modern machine tools. The spindle is designed in many forms for milling, turning, or other machining, which are basically based on the drive mechanism and other power systems. In terms of classification, there are mainly belt driven, motorized, gear driven, direct driven, built in, etc. Compared with other drive mechanisms, the direct drive spindle design for milling has greater torque power, faster and more accurate activation, and has greater area coverage.
Generally, a machine tool can contain multiple spindles, such as the spindle box and tailstock spindle on a bench lathe, and the primary spindle is usually is the biggest one. If the spindle is referenced without further limitation, it means that the target object is the spindle. In today's industry, there are many available components to be combined. DD spindles equipped on milling machine are usually designed to have a larger body, so that they can accommodate larger and longer spindle bodies, which ultimately providing higher processing strength for workpieces or other objects.
The difference between the turning spindle and the lathe spindle is not obvious. At the beginning, the belt-driven spindle was installed on the lathe. Because the spindle design was simple at the time, there were not many options on the market. The belt-driven spindle has many excellent characteristics and is easy to maintain due to its structural characteristics. Even though there are various type of spindle for turning and milling machines on the market, belt-driven spindles are still very popular. On the other hand, motorized spindle is the most popular type in high-end and advanced lathes, such as turning centers with power turrets and some turning milling centers with multiple spindles on the front and back. For the motorized spindle (built-in spindle), there are many convenient advantages, such as high torque, no tooth loss problem, and better stability. Neither of these is absolutely superior to either. At the same time, this type of headstock housing designed by the headstock is much more complicated than a belt-driven headstock. As a result, the design of the headstock is not only based on function, but also on economic issues, and only when the budget is balanced can the buyer use them in an ideal way.
Read More: Lathe Spindle & Processing Performance, What Is the Benefit of Turning Spindle
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