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Several small issues needing attention in selecting collets

Mar 01, 2023Leave a message

The usage rate of the tension spring collet product has improved rapidly in the past two years, which is a hundred times higher than that of the previous two years. With the continuous improvement of the small processing industry, the quality and accuracy of the processing are undoubtedly the current major competitors. The speed of the tension spring collet is elastic. If the workpiece dimensions are common, the speed of the tension spring collet will be faster. If the size of the workpiece needs to be changed greatly, it may be necessary to select a jaw chuck to adapt to processing the workpiece with a wide scale. Type of information For hot rolled steel, forgings, and molded parts, standardized jaw chucks generally work better because all such parts have inherent diameter changes.

On the other hand, cold rolling data parts usually have good dimensional commonality, so it is suitable to select tension spring chucks. However, the lack of a common diameter measurement does not necessarily constitute an obstacle to the selection of tension spring chucks. Instead, chucks can be provided for planning non circular cross sections for clamping molded bars into the desired shape for the customer. Spindle load capacity The maximum allowable load for a lathe spindle depends on the bearing load capacity. If the chuck and workpiece are combined too heavily, the bearing may be overloaded. For processing tasks that have risks beyond their limits, this risk may determine the selection of workpiece clamps. Claw chucks usually have a larger weight than equivalent tension spring chucks. Therefore, tension spring chucks are the appropriate choice in situations where control weight is required.

Spindle speed tension spring chucks are usually better selected for turning at very high spindle speeds, mainly due to two factors: one factor is related to the quality of the chuck. Assuming that the jaw chuck and tension spring chuck are driven at the same spindle horsepower, thicker and heavier jaw chucks require longer periods of time to accelerate the required speed, which will extend the operating cycle and reduce productivity. Another factor related to centrifugal force is that it is added along with the square value of rpm, so this value is important in high-speed cutting. For example, by doubling the spindle speed, the centrifugal force will be four times the original. This force pulls the chuck jaws away from the base, usually reducing the clamping force. However, when selecting a tension spring chuck, the centrifugal force will not have a significant impact. Therefore, the clamping force will be more stable within the full processing speed scale.

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