CNC machining center is the abbreviation of computer network digital economy control machine tool, which is an automatic machine tool controlled by a program. Use the digital information of the enterprise to manage and control the movement of the machine tool and the machining and production process. General cnc machining machine tools refer to precision engineering machinery product machining, cnc machining lathes, milling machines, boring machines, etc. How to reasonably set the center, speed and feed of CNC machining?

CNC machining can use control codes or other symbolic instructions to logically process programs. Use the computer to translate it into code, so that the machine can run according to the prescribed actions. Through turning, milling cutter and other tools, the blank is processed into semi-finished or finished parts. Currently, CNC machining machine tools have been widely used in various machining platforms. CNC machining centers have become the development trend and necessary technical means of mold machining.

During the use of CNC machining, some process parameters need to be set, such as feed rate, spindle speed, spindle forward and reverse, tool change, coolant switch, etc.

The spindle speed, feed speed and cutting rate of the CNC machining center are mainly determined by the tool. The parameters of the machining tool for different quantities of the same material are different. However, the tool will provide parameters to be set at the time of purchase. For example, three Gatwick import tools, where the tools will provide different materials and machining parameters such as feed rate, cutting and speed.

The development of cutting motion speed can be calculated according to the relevant formula, cutting speed = (machining a diameter/3.14/rotation speed) * 1000. For example, if you want to machine holes with different diameters of 50mm, the actual cutting speed of the tool is 150m/min.
Spindle speed = (150 / 3.14 / 50) * 1000 = 955 revolutions
Make reasonable settings according to the size of the tool, the hardness of the machining technology material, the performance of the machine tool, and the precision of mold production and machining. The tool is large, the material is hard, and the accuracy can be low, the speed is slow, and vice versa. Specific problems should be explored based on work and life experience.

The characteristic of the machining center is one-sided: when a one-sided to the clamp is used for machining, the CNC controls the machine tool and automatically changes the tool according to different selected steps; automatically changes the spindle speed, feed speed and tool comparison with the workpiece. Function, continuous drilling trajectory, countersinking, reaming, drilling, tapping, milling and other machining procedures, used to automatically process each surface of the workpiece. Because the machining center can be shared and automatically implement various machining operations to avoid human error, reduce the time of workpiece clamping, workpiece and adjustment work machine and measurement, machining and storage time, greatly improving the machining efficiency and so Has good economic benefits. The space can be divided into vertical machining centers and horizontal machining centers according to the position of the spindle machining center.

CNC machining is also called CNC machining. Cutting is common in CNC machining equipment. CNC machining is high-efficiency machining, which is controlled by a post-programmed computer. Therefore, CNC machining has stable machining quality, high precision and high repeatability. In the actual process, human factors and operating experience will greatly affect the machining quality. CNC machining center wants to operate the machine efficiently, these details must not be overlooked.

  • In general, the arrangement of the machining time sequence should be considered according to the structure of the part and the status of the blank, as well as the needs of market positioning, and the focus is that the rigidity of the workpiece is not damaged by the environment. Sequential development should generally be carried out according to the following principles:
    One: The numerical control machining of the procedure cannot affect the positioning and clamping of the next procedure, and the general machining procedure should be considered comprehensively.
    2: Process the inner cavity, and then process the outer shape.
    Three: Positioning is the same, clamping or machining the same tool CNC connection to reduce repeated positioning, the number of tool changes and the same steps of moving the platen.
    Four: For the multiple machining procedures carried out in the same installation, the procedures should be arranged with little damage to the rigid structure of the workpiece.
    Which aspects should be paid attention to when determining workpiece clamping?
    The following three points should be paid attention to when determining the target positioning system reference and clamping plan:
    1. Strive to have the same benchmarks for design, craftsmanship and programming.
    2. Minimize the number of fixtures, as far as possible, all curved surfaces processed by CNC can be processed in one positioning.
    3. Avoid using manual payment adjustment scheme.
    4. The fixture should be opened smoothly, and the development of its positioning and clamping mechanism cannot directly affect the cutting in cnc machining (such as cultural collision). When encountering some such problems, use a vise or add a bottom plate to pull the screw Way of clamping.
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