Six-axis linkage perturbation feed method for closed blisk electric spark processing
An integral blisk and EDM technology, applied in the field of electrode perturbation feed, can solve problems that are difficult to meet and unsuitable for more complex parts processing, and achieve the effects of reducing processing costs, improving feed processing efficiency, and convenient chip removal
Active Publication Date: 2014-10-29
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
However, this technology is only suitable for three-dimensional cones, and is not suitable for the processing of more complex parts, and it is difficult to meet the needs of existing industrial applications
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Embodiment 1
[0026] Such as figure 1 As shown, it shows the situation of using six-axis linkage EDM closed blisk and the definition of each coordinate axis of the machine tool; the closed blisk six-axis linkage CNC EDM electrode perturbation feed path planning proposed by the present invention The process of the method is as follows figure 2 shown.
[0027] according to image 3 Shown, concrete steps of the present invention are as follows:
[0028] In the case of no perturbation, there are n intermediate positions during the electrode feeding trajectory (ie, the existing electrode main movement trajectory). It can be seen that when the electrode is fed to the i-th step, the gap between the electrode and the workpiece is only the space removed by the discharge erosion in the previous i-1 step, and the local area is only the discharge gap area, and the discharge space of the erosion products is very limited.
[0029] In order not to lose generality, the following discussion will be mad...
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The invention provides a six-axis linkage perturbation feed method for closed blisk electric spark processing, and relates to the field of numerical control processing. Reciprocating slight disturbance perpendicular to the main movement track direction is added on the basis of an electrode main movement track, namely, a reference plane perpendicular to the perturbation feed direction of posture change of an electrode head is acquired at each node on the electrode main movement track, and a perturbation area is obtained in the reference plane according to extreme positions where an electrode can move; optimization reference nodes are collected in the perturbation area around the main movement track, new feed directions are obtained through fitting sequentially, and a perturbation feed track supporting linkage of maximum six axes is formed by adding dense nodes; finally, numerical control processing codes of the track are output, and closed blisk electric spark processing with optimization cutter lifting movement is realized by the aid of the electrode. According to the six-axis linkage perturbation feed method for closed blisk electric spark processing, the discharge condition of a corrosion-removed product is improved, and the stability of electric discharge machine and the overall processing efficiency are enhanced by adding extra perturbation movement on the premise that no interference is guaranteed between the electrode and a final shape surface.
Description
technical field [0001] The invention relates to a machining process in the technical field of mechanical automation, in particular to an electrode perturbation feeding method capable of improving the machining effect during the electric discharge machining process of a closed integral blisk. Background technique [0002] Blisk parts are the core components of aerospace engines. Due to the advantages of high reliability and effective suppression of resonance, blisk parts with closed integral structure have been more and more widely used in the field of aerospace engine design. The blades, disk body and blade crown of the closed integral blisk are made of the same blank, and it is a semi-closed structure, which brings a series of difficulties to the processing. Multi-axis linkage EDM is an effective machining method for closed blisks. The principle is: the forming electrode enters the flow channel area along a complex movement path that does not interfere with the final shape...
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Inventor 赵万生康小明梁为李护林何斌谢合瑞
Owner SHANGHAI JIAO TONG UNIV