First of all, "five-axis" and "five-axis linkage" cannot be equated. "Five-axis" refers to the machine table has five axes of motion, namely XYZ three linear axes of motion and AB two rotary axes. Generally speaking, after having these five axes basically processing the workpiece is no dead angle, (in addition to the workpiece clamped on the table surface) the significance of the existence of five-axis is to realize the requirements of high-precision workpiece "a clamping, multi-surface machining," to avoid repeated clamping errors.
"Five-axis linkage" refers to the five axes of motion of the machine tool, in the processing of the workpiece can be coordinated at the same time, so the full name should be called "five-axis five linkage machine tool". If the machine has five axes, but one or two of the axes cannot move simultaneously with the other axes, then the machine should be called "5-axis 4-linkage" or "5-axis 3-linkage". "Five-axis five-linkage" is much more advanced than "five-axis three- or four-linkage".
Five-axis machine tools at present, there are not a few domestic manufacturers can get out, five-axis machine tools can be produced by manufacturers is more. Mainly five linkage CNC system problems, five axes coordinated action, their trajectory is a very complex calculation process, the current domestic software is not mature, the current market can sell the imported five linkage system only "Siemens", priced at about 50W, or shielded a lot of functionality, get back to the Can only play, a lot of practical complex workpiece system does not support, processing can not. So only spend a lot of money to buy people's original machine, are hundreds of millions of dollars.
The owner you are ready to engage in the "CNC five-axis linkage laser welding system" ? I suggest, do not get into the machine tool, but to get into the form of "robotic arm". There are several reasons:
The machine tool is the workpiece on the table to do cutting, in order to withstand the "weight of the workpiece and processing of the cutting force", so the machine tool itself requires high rigidity of the components, so the use of a large number of castings. Your design is a welding system, welding position is almost no force, and the weight of the solder itself is very small, so the equipment itself does not require high rigidity of the components, the use of robotic arm can greatly reduce the cost of materials.
"Robotic arm" is used in the "N" shape, "N" each bend point to do circular motion, to realize the arm expansion and contraction. By installing the "torque motor" directly at the bending point, the rotation angle can be controlled. "Torque motor" control method, compared with the machine tool commonly used "servo motor + screw" method and "worm gear + worm" method, its advantages are: simple structure, small footprint The advantages of this method are: simple structure, small footprint, small error (torque motor does not need gear transmission, it directly drives the component to turn the angle, so there is no gear lag error).
If you are doing graduation design, I can only give you a rough idea, I hope to help you, the details of the part only their own thinking.