Some tips for purchasing a five-axis machining center


A five-axis machining center is a high-tech and high-precision machining center that is specifically designed for machining complex surfaces. This type of machining center has a significant impact on industries such as aviation, aerospace, scientific research, precision instruments, and high-precision medical equipment. The five-axis CNC machining center system is a method for machining blades, turbine blades, marine propellers, heavy-duty generator rotors, steam turbine rotors, large diesel engine crankshafts, and more.Among the available CNC systems, the performance of a five-axis machining center can vary greatly, as can the price. It is important to choose the right system based on your needs and avoid over-purchasing or wasting resources.

Here are some tips for purchasing a five-axis machining center:

1. Machine stiffness.

Machine stiffness directly affects productivity and machining accuracy. The machining speed of a machining center is much higher than that of a general-purpose machine, and the power of the electric motor is also higher than that of a general-purpose machine of the same specification. Therefore, the stiffness of its structure design is also much higher than that of a general-purpose machine. It can be calculated according to the process requirements, the allowable torque, power, axial force, and feed force values based on the numerical values provided by the manufacturer. In order to obtain the high stiffness of the machine, it is often not limited to the size of the parts, but to choose a machine that is 1 to 2 sizes larger than the size of the parts.

2. CNC precision.

CNC precision has a crucial impact on machining quality. It should be noted that machining precision and machine precision are two different concepts. It is incorrect to use the position precision on the manufacturer’s sample or product qualification certificate as the machining precision of the machine. The position precision indicated on the sample or qualification certificate is the precision of the machine itself, while the machining precision is the total error of the entire process system caused by various factors including the allowable error of the machine itself. When selecting a model, the assessment method of process capability Kp can be used as a basis for precision selection. Generally speaking, the calculation result should be greater than 1.33.

3. Selection of the CNC system.

The functions of the CNC system are divided into basic functions and optional functions. Basic functions are necessarily provided, while optional functions are only provided by the manufacturer if the user chooses them and are subject to additional charges, which are generally higher. The functions of the CNC system must be selected according to the performance needs of the machine. When ordering, not only the required functions must be ordered, but also the need to avoid waste caused by low utilization rate and pay attention to the correlation between various functions.