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Posted on Jan 10, 2019
In the field of mechanical engineering, the power chuck is a special type of power clamping device, which is used to clamp work pieces with radial symmetry, especially cylindrical objects.
A power chuck is a kind of clamping device that has jaws operated by hydraulic or pneumatic pressure by which a workpiece is secured in an automated manner. It is often used to clamp cylindrical objects with radial symmetry. When in use, the correct jaws are installed into the chuck so that the workpiece can be clamped in place.
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The main advantage of a power chuck is the superior efficiency alongside the more consistent pressure on the workpiece. When in use, the compression of the workpiece is so constant that the workpeice is held by air or hydraulic pressure instead of manually clamping it in place (such as a vise on a workbench).
The unique design allows workpieces to be clamped much faster which makes it an ideal choice for high-volume production. When the production involves a high volume of identical, large workpieces, the manual clamping and unclamping would greatly increase the time spent the tasks. This is why power chucks are often the primary choice when production efficiency is the top of the concern.
Another wonderful thing about power chucks is that they have undergone drastic advancement where a greater extent of the adjustment of clamping pressure is now possible with modern models, while allowing different jaws to be installed depending on the requirement. With the above covered, it is not to say that power chucks are always better than manual chucks; it’s just that manual chucks are better suited for low-volume, high-precision application. If you happen to be the owner of a workshop, you’ve probably already learned that selecting the right tool for the right task is more important than anything.
Power chucks can be used to hold rotating tools, such as rotating drills and milling cutters. In drilling applications, an additional chuck may be installed on the non-rotating tailstock case. Jaw may be arranged on power chucks in a symmetrical pattern. The jaws are tightened to hold the tool or work piece. Generally, the jaws can be tightened or loosened with a power chuck key, which is a wrench-like tool designed for this purpose. Some jaw power chucks are keyless, and their tightening and loosening can only be done manually. The keyless design provides a faster and easier clamping and loosening mechanism, but this design has a lower clamping force.
In lathe machinery, the power chuck is usually installed on the rotating spindle in the headstock. Work piece spinning machines and tool spinning machines have some similar functions and outstanding processing characteristics. For example, in a lathe, the power chuck and cylinder system work together to execute the clamping mechanism, and the assembly of the two determines the output precision of the machine.
Compared with other machine tools, turning machines (lathes) is one of the oldest machine tools with thousands of years of history. Lathes can be divided into two main types according to the way of clamping the workpiece.
The two types are vertical lathe and horizontal lathe. In a vertical lathe, the workpiece is clamped vertically, and the cutting tool is installed in the same direction so that the machining is performed vertically. Compared with horizontal lathes, the vertical clamping mechanism is more stable. Therefore, vertical lathes are often developed for high precision machining, such as automotive parts, aerospace parts, sports facilities, or some large workpiece processing tasks.
For vertical clamping, the lathe spindle is located behind the chuck. The spindle may be driven by a belt or other drive mechanisms. Like milling machines and machining centers, lathes can also be equipped with powered tools and tool magazines to improve their functionality and versatility and provide users with a wider range of machining possibilities. For horizontal clamping, on the other hand, the spindle of a horizontal lathe is parallel with the floor. While is it often considered the more prevalent of the two, both vertical and horizontal clamping offers their own advantages.
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