Factors On The Quality Of Welding In The Manufacturing Process

1300 Words 6 Pages
Since the management team decided to assess the effective factors on the quality of the welding in the manufacturing process by utilizing simulation, we have to briefly describe the used simulation process called Design of Experiment (DOE) and understand the characteristic of such analytical process.
Basically, the process of accumulating the data based on the observations is time-consuming and costly and miscalculation in the return of investment on the improvisation can be harmful to the organization. Therefore, different types of analytical software were developed as alternative tools to assist the companies to examine their hypothesis about the assumed issues on simulated platforms. Using such simulating programs in a Six
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Determining the critical factors usually takes place through accumulating the voice of customer(VOC) but in this case, the risks associated with the process were the determining factors in welding. Critical parameters (YS) is directly related to the success of the welding process and considers to be the dependent variable and the controllable factors (XS) are the independent variable. In addition, a factor of noise (n’s) that could be effective on the critical factors is also taken into account. Assigned team found the important factors effective on the quality of laser welding as following:

• Invar thickness
• Copper thickness
• Epoxy thickness
• Epoxy modules of
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5. Central Composite Design: In order to ameliorate the results of the reduced factorial experiment and reach to a better understanding of the magnitude of the significant factors another test was implemented. Central Composite Design (CCD) is a complementary test to the factorial design to enable the pundits to estimate curvature. This function enables the experts to predict the stress based on the stated levels of the three significant factors. A CCD explores the extremes of the factor levels in more depth. The test examines in a +1/-1 level to get a better understanding of the effects the factors may have on the results. The CCD consists of a center point and six-star points. The star points represent the +/-2 alpha levels of the factors. (value of α depends on desired properties for the design and the number of factors involved). The purple dots in Figure 6 are called the star points because of the resemblance to a star of the dots when they are connected to one another through the center. The central composite design always contains twice as many star points as the indicated factors in the design. The star points represent new extreme values (low and high) for each factor in the design. Thus, there are six purple dots because there are two extreme cases for each significant

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