Precision CNC lathe is a kind of high-efficiency and high-precision equipment, which can process rotary parts such as shaft, disc sleeve and so on. It can automatically complete the cutting of internal and external cylindrical surface, cone surface, arc, thread and other processes through program control, and carry out groove cutting, drilling, expanding, reaming and other work. Precision CNC lathe is controlled by software. Software is the key to ensure the normal operation of CNC machine tool. Once a parameter is lost or changed by mistake, it will lead to machine error, some functions can not be realized, system confusion and even paralysis.
1. The main reason for the error of NC machining is to avoid the error of NC machining. It can be solved by increasing the number of interpolation nodes, but it will increase the programming workload.
2. Tool tip arc error: when cutting the inner hole, external cause or end face, the tool tip arc does not affect its size and shape, but it causes over cutting or less cutting due to the influence of tool tip arc when machining conical surface or arc. This error can be eliminated by measuring the radius of the tool tip arc and using the tool radius compensation function.
3. Measurement error: it is mainly affected by the measurement accuracy of measuring tools and the operation method of the surveyor, resulting in inaccurate measured size, which can be compensated.
4. Tool setting error: this error mainly occurs in the process of tool setting. When the tool moves to the starting point, it is affected by the feed adjustment proportion value of the operating system. The solution is to select the feed adjustment proportion reasonably, especially when the tool is close to the starting point, the minimum gear feed adjustment is adopted to make the tool accurately locate at the starting point.
5. Machine tool system error: the shape and position tolerance caused by the influence of CNC lathe itself, which is generally not adjustable; the repeated positioning error caused by servo unit and driving device is mainly affected by the system by the pulse equivalent size, uniformity and transmission route of the machine tool; these errors are small and stable, which should be considered only in precision machining.
On 2018-08-08 11:45:46
