Application of spring chuck
In the modern and complex manufacturing environment, if you want to maintain continuous cutting in the best condition, most factories must undergo rigorous training by machine tool manufacturers, and carefully study the processing motion principles, structural features and use skills of new equipment. Operational use. This is especially true for the top technical systems. For example, advanced machine tool control systems, compilation of 5-axis machining programs for complex-shaped parts, etc. Fortunately, there is an opposite solution, which is some powerful, high-precision, easy-to-operate (no special training required) and long-life process equipment that has been developed so far. The collet chuck (or spring sleeve) with high positioning accuracy relative to the chuck used to quickly locate and clamp the workpiece (or tool) belongs to this category. It has a long history of more than 100 years and a wide range of applications. The spring chuck must remain the same as the positioning datum of the workpiece (or tool) such as the spindle. Collet and workpiece (or
The relative movement between tools) will result in incorrect parts processing. The collet and the workpiece (or tool) phase
Rotation or relative axial movement will affect the consistency and geometric accuracy of the processed workpiece.
The use of the first collet is not ideal. But it did prove a fact at that time that the use of a good workpiece chuck can improve production efficiency and machining parts accuracy. Later, Hardinge, a well-known company in the field of lathe development and manufacturing, proudly used (in 1890) the spring chuck developed by the company on their lathe in 1901 to provide workpiece positioning and clamping. Publish their product drawings and series of products developed. At that time, it was mainly developed to meet the market needs of mass production in the watch and lens manufacturing industry. It is incredible to be able to provide handy spring chuck products for ordinary lathes and cam-type multi-axis automatic lathes in the early period (before 1920). This is like configuring a set of modern technology control system on the current advanced CNC lathe.
Let us look back on the past. With the continuous advancement of processing and equipment technology, in the design reform trend that requires each system to increase the production efficiency extremely, the most basic but important process equipment spring chuck as a machine tool, but There is no space and time for design. This seems to be a very strange thing.
Under the situation that the structure of the machine tool is changing rapidly, the miracle that can continue to maintain the basic structure of the original collet chuck remains unchanged, mainly due to its unique dexterity, exquisite structure and powerful functions, easy to use and Features such as good economy. Although the spring chuck is small, it does play a very important role in the machine tool industry. This is because it has the following strong functions:
1. It can accurately position and clamp the workpiece (or tool), and has the function of resisting torque and bearing cutting forces from multiple directions.
2. It has the function of increasing the driving force (pull force) and converting the driving force to the clamping force of the workpiece (or tool).
3. It has the function of quickly releasing the workpiece (or tool).
4. It has high repeat accuracy without reducing the processing accuracy and preventing the workpiece from being damaged.
5. It has the ability to work in a wide range of spindle speed with only minimal loss of clamping force.
6. The moment of inertia is the smallest in high-speed cutting.
In general, the design and use of spring chucks is a very broad field. It needs to correspond to a variety of machine tool series, and includes products designed to reflect their different styles and characteristics from machine tools. So the total number is thousands. However, there is still a common misconception that the collet is only used to clamp cylindrical workpiece blanks. This is not true. In fact, it can position and clamp almost any shape of workpiece (or tool), including square or hexagonal workpieces.