Positioning principle of CNC five axis machining

Positioning principle of CNC five axis machining

  1. Five axis vibration disc machining center, also known as five axis linkage machining center, is a kind of machining center with high technology content and high precision, which is specially used for machining complex surfaces.
  2. This kind of machining center system has a decisive influence on a country’s aviation, aerospace, military, scientific research, precision equipment, high-precision medical equipment and other industries.
  3. The five axis machining center has the characteristics of high efficiency and high precision. The complex machining can be completed by clamping the workpiece once. There is a big difference between five axis machining center and pentahedron machining center. Many people don’t know this and mistakenly regard pentahedral machining center as five axis machining center.

The common linear feeder consists of three parts: linear track, electromagnet and spring. By connecting the electromagnet with 220 V AC, the electromagnet vibrates, and the electromagnet drives the linear track movement through the spring plate, so as to achieve the purpose of linear feeding.

Five axis vibration disk processing application field:

Linear feeder is widely used in many fields. Generally speaking, as long as the need for vibration plate feeding place, you need a linear feeder for linear feeding!

Working principle of five axis vibration disk machining:

The practical application of five axis vibration disk machining shows that the reasonable AC servo system can meet the requirements of fast response speed, high speed accuracy and strong robustness of the control system, and the maximum position control accuracy in practical application is about ± 0.1 mm, and the accumulated error can be avoided. The control system can be used in the production of high-precision opening series cold-formed steel products, especially the products similar to shelf column, that is, the cold-formed forming production line with on-line pre punching holes with high-precision requirements for the vertical and lateral positions of cold-formed steel.

In fact, the application of five axis machining in mass production is increasing. Some parts do need five axis machining, while some parts do not need five axis machining at all. The increase of this kind of application is due to the more and more complex parts and the higher precision requirements of parts. This kind of parts is the representative of the vast majority of five axis machining. In this case, it has the advantage of one-time clamping to complete all the processing. The reason for using five axis machining is that it can improve the processing capacity and production efficiency.

Most practical five axis machine tools are composed of three linear coordinate axes and two rotary axes. In addition, it has been proved that the 3 + 2 axis part positioning (trunnion and planetary structure) with three linear axes and two rotary axes on one side of the tool is a good solution.

Another innovative variant design of five axis vibration disc machining is that three linear axes and one rotary axis are used on one side of the tool, and the workpiece is driven by only one rotary axis (tilt head frame structure). These two structures will be further discussed in the following. All the five axis motion is completed by one side of the tool, and the work is not only a common structure in the processing of large parts such as aircraft and large mold. This is because the size and mass of the parts are too large to adopt other structures. The recently developed parallel kinematic machine tool is also entering industrial application. UG / post execute and UG / post builder constitute the post-processing of UG processing module. The postprocessing module of UG makes it easy for users to set up their own postprocessing program. The two basic elements of post-processing are tool path data and a postprocessor.

There are two ways to use UG / post execute postprocessor for postprocessing

① Using mom (manufacturing output manager), the,

② Using GPM (graphics postprocessor module).

The working process of mom is as follows:

Tool path source file → postprocessor → NC machine tool

Mom post-processing takes UG tool path as input. It needs two files: one is event handler with extension. TCL, which contains a series of instructions to handle different event types; the other is definition file with extension. Def, which contains a series of static information of machine tools and tools. These two files can be generated by UG’s own tool post builder. When these two files are generated, they should be added to the template_ post.dat The format is as follows:

fanuc,${UGII_ CAM_ POST_ DIR} fanuc.tcl ,${UGII_ CAM_ POST_ DIR} fanuc.def .

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