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Precision parts processing, should consider what factors?

Issuing time:2019-10-14 16:26

The arrangement of the machining sequence of precision parts should be considered according to the structure of the parts and the situation of the blank, as well as the requirements of positioning and clamping. It is important that the rigidity of the workpiece should not be broken.

1. The processing of the previous process does not affect the positioning and clamping of the next process, and the processing technology of common small parts in the middle should also be comprehensively considered.

2. First stop the processing sequence of the inner cavity shape, and then stop the processing process of the shape.

3. In the same position, the clamping mode or the same tool processing process should be stopped to reduce the number of repeated positioning, the number of tool changes and the number of moving the pressure plate.

4. Multiple stop processes should first be set up in the same device to reduce the rigid damage of the workpiece.

Understand the difference between machining precision and accuracy

Advances in manufacturing technology have opened up new possibilities for the types of parts that can be designed and machined. The increased precision and accuracy of machine tools allows parts to be manufactured with tighter tolerances, which can be maintained for tens, hundreds or even thousands of part cycles. But what do we mean when we talk about precision? What exactly does precision mean in manufacturing? Understanding the difference between machining accuracy and precision can help you design better, more affordable parts and ensure that your needs meet expectations at the time of manufacturing. Below, we will understand the difference between processing accuracy and precision together with Changzhou Machining.


What does precision mean in terms of machining? In short, the exact machine will perform the operation (cutting, drilling, etc.) as intended by the operator/programmer. If the CNC tells the machine to drill a hole 5 inches from the outer edge, the machine will perform this step in a 5-inch sequence without problems.


If accuracy is how close the CNC is to performing an operation on a given parameter, then accuracy is related to the repeatability of the operation. Consider a manufacturing environment in which parts are being machined by the thousands. The high-precision machine will maintain the same accuracy on the 500th part as it did on the first part. If the size of the parts in the batch varies greatly, this will result in a serious lack of precision and will be a real pain for the machine operator. That is, even if a machine is not accurate and its finished dimensions are different from those programmed (i.e., a hole is drilled 3 inches from the edge and a borehole is 3.02 inches), it can still be accurate if it is able to consistently repeat the program for a large number of parts.

Most modern CNC tools can repeatedly maintain programmed dimensions without problems, but it is important to consider the level of precision/accuracy required when designing and manufacturing parts. Certain parts need to maintain extremely tight tolerances in large quantities, but this requires additional time, setup, inspection, etc., when machining. Therefore, in many cases, the higher accuracy is not worth the increased manufacturing cost.

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