智能冲压工艺规划系统英文文献和中文翻译(4)
Parts in the shape of the intelligent model definition, the results are stored in a knowledge base.
2) get parts precise information. The precise information should get in ribbon layout knowledge base. Useful information including punching accurate information and relative location information. This type of knowledge model of information will decide parts stamping sequence. The design process is the main requirements for the position precision to develop a knowledge model [12]. First, the shape of the parts were pided into closed contour. Outline the number of n
K = {k1, k2,..., ki,..., kn} (1)
Here the first I ki says parts an outline. The relative relations between all contour contained in the relationship of P. If in contour kj ki and precision, there exists between requirements ki, kj) ∈ (p.
P = {...., (ki, kj),...} ki, kj ∈ K, 1 acuities were I, j acuities n (I _ = j). (2)
The position precision from P get relevant matrix is:
(3)
Each type of accurate information through the correlation matrices is preserved in knowledge model.
3.3.2 ribbon layout automatic design
Ribbon automatic placement design module in the knowledge model is the most important one. In the knowledge model contains a lot of important rules, for example in a single stroke in stamping all the inner contour is better. In the next stage of this section was cut off. Sometimes, if the distance between the stamping point within is very small, some will be moved to outline a stage for machining. If stamping point too close from fractionation point fractionation point, if will need to be changed to the next stage. If there are still not the right size and some point can be moved to the next stage. Repeat the process until matrix of every size between points can be accepted. Intelligent design is the core of the layout of the intelligent model development interference point. [13]
Parts were pided into many point blank form. These point name is k1, k2,..., dij kn. Here
Kj ki and is the smallest distance between. Matrix critical value is S. If dij < S, ki and kj
Can't draw in the same steps. This kind of situation is intelligent model of the conflict between two points. Development of the intelligent model interference point ChongTuDian aim was to determine the existence. This matrix is a system matrix. In order to make the design process is more convenient, can put the matrix of half part element zeros.
Here, mu ij correlation coefficient, which it says is for every to point between different relations. If there is a contradiction between two points, one of them is to be moved to the next step. In every step of ChongTuDian disappear until repeat this step. Finally matrix M become empty matrix.
The shingles layout of 3.3.3 trace process
The layout of the shingles son two of handling knowledge model: change results and create part graphic layout. Automatic design model from ribbon layout draw result is staple. They may can't satisfy the users of all the requirements. Depended on the knowledge model data structures, by moving point and change steps, increase steps and deletes empty empty the purpose can be realized step. We can pass the data processing steps to revise the ribbon of the layout design results. Step change can work through exchange of coding to realize two positions, work step increase or decrease can insert or removed by the operation to complete. Code When we want to move some point, we can from the first step to the last step transfer list is points. Figure 7. Shows is the ribbon automatic placement design result [11].
Figure 7: ribbon automatic placement design result
3.4 sure stamping center and force calculation of intelligent model.
Press center design model establishment is the purpose of the group operates [11] together. Mould tool center and stamping center's consistent is very important, only as stamping tools can together the normal work. Press center from the knowledge model calculation of every contour position in conclusion. Design is to get the first part of the tools work area. CAD platform of parts provided parts of graphic outline the rectangle. Rely on stamping center and the relationship between the rectangular can generate work area. Because of the result of unbalanced force is the possibility, it also offers stamping center regeneration into. Regeneration by human-machine interface into steps to complete. Software Figure 8 shows as the composite modulus stiletto mechanic for design of area results.