Now with the development of economy, the development of cnc processing customization technology is getting stronger and stronger. Many CNC processing customization industries are currently in a hot state, but in factories that need processing, they know little about CNC processing customization and do not know how to choose. Next, I will introduce to you.
CNC is the abbreviation of CNC machining, which is the process of removing material through precision machining. Precision processing, that is, precision processing, is processing performed by high-precision processing machine tools. The method to realize the precision machining of parts is mainly to process high-precision parts with high-precision machine tools. Use error compensation technology to improve the machining accuracy of high parts.
There are two main types of processing: manual processing customization and cnc processing customization. Manual processing customization refers to the method by which machine operators process various materials by manually operating machinery and equipment (such as milling machines, lathes, drilling machines, and saws).
Manual processing is suitable for the production of small batches and simple parts. High-precision machining (cnc machining customization) uses CNC equipment to perform mechanical operations, including machining centers, powder machining centers, WEDM equipment, thread cutting machines, etc.
In the process of changing from the blank to the finished product, the total thickness of the metal layer removed from the machined surface is called the total machining allowance of the surface. The thickness of the metal layer removed in each process is called the machining allowance between processes.
Machining allowance is considered in terms of diameter, so it is called symmetric abundance (ie, bidirectional abundance). In other words, the thickness of the metal layer actually removed is half the diameter of the machining allowance. The machining allowance of the plane is actually the allowance of a single edge, such as the thickness of the metal layer to be removed.
The purpose of leaving a machining allowance on the blank is to eliminate the machining errors and surface defects left by the previous process, such as the chilled layer, pores, cinnabar layer, oxides on the surface of the forging, decarburized layer, surface cracks, and after cutting Internal stress layer and surface roughness, etc. Mention high working accuracy and surface roughness.
The size of the machining allowance has a great influence on the processing quality and production efficiency. Excessive machining allowance will not only increase machining workload and reduce productivity, but also increase material, tool and power consumption, thereby increasing machining costs.
The machining allowance is too small to eliminate various defects and errors in the previous process, nor can it compensate for the fixture errors in the process of the process, resulting in waste products. The principle of selection is to ensure the quality and make the margin as small as possible. Generally speaking, the more completed, the less margin.