CNC Machining China blog - Precision CNC Machining Solution for Metals

　 The thickness of the metal layer removed in each process of CNC turning is called the machining allowance between processes. For the torsion surface of the outer circle and the hole, the machining allowance is considered from the diameter, so it is called the symmetry allowance (that is, the bilateral allowance), that is, the thickness of the metal layer that is actually removed is the diameter of the machining allowance. half. The machining allowance of the plane is the unilateral allowance, which is the thickness of the metal layer that is actually removed     The goal of leaving a machining allowance on the workpiece is to remove the machining deviation and external defects left by the previous process, such as the chilled layer, pores, and sand layer on the outside of the casting, and the oxide scale, decarburized layer, and external cracks on the outside of the forging. , The internal stress layer and external roughness after cutting. Thereby improving the accur...

  When CNC machining processes are divided, it must be flexibly controlled based on the structure and manufacturability of the parts, the functions of the CNC machining center machine tools, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also recommended to adopt the principle of process concentration or the principle of process dispersion, which should be determined according to the actual situation, but must strive to be reasonable. The division of processes can generally be carried out according to the following methods:   　 When CNC machining is divided into processes, it must be flexibly controlled according to the structure and manufacturability of the parts, the functions of the CNC machining center machine tools, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also recommended to adopt the principle of process conce...

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There are three main guide rails for cnc machining centers. According to the conflicting nature of the contact surface, they can be divided into hydrostatic guide rails, sliding guide rails, and rolling guide rails. The difference between these three guide rails is relatively large. You must have something to do with cnc processing. Understand, the following editor will briefly introduce their advantages and disadvantages. There are three main guide rails for cnc machining centers. According to the conflicting nature of the contact surface, they can be divided into hydrostatic guide rails, sliding guide rails, and rolling guide rails. The difference between these three guide rails is relatively large. You must have something to do with cnc processing. Understand, the following editor will briefly introduce their advantages and disadvantages. The advantages of are as follows: CNC machining aluminum parts 1. There is an oil cavity between the working surfaces of the two guide rails of t...

In actual processing, the types of threads generally include: ordinary single thread, trapezoidal thread, special thread, special-shaped thread, etc. Among them, ordinary threads are the most widely used. Coarse threads are mostly used for connection, while fine threads are used for the connection of thin-walled parts or parts subject to variable load, vibration and impact load, and can also be used for mechanism fine-tuning. When machining ordinary threads, it is necessary to pay attention to the need for multiple cycle feeds during cutting, and the cutting depth must be reduced in accordance with a certain proportion each time. plastic machining  If the cutting depth of each tool is the same, the force on the cutting edges on both sides of the thread turning tool will increase sharply as the material removal rate increases, resulting in a decrease in thread accuracy and tool damage. In the competition, internal threads and external threads are relatively common, and the processin...

What are the characteristics of the CNC turning process? Turning is a method of cutting the workpiece on the lathe by rotating the workpiece relative to the tool. Turning is the most basic and common cutting processing method. Most workpieces with revolving surfaces can be processed by turning methods, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, end surfaces, grooves, threads, and rotary forming surfaces. Common lathes can be divided into horizontal lathes, floor lathes, vertical lathes, turret lathes and profiling lathes, and most of them are horizontal lathes.