[Case Study] Variability in Quality
Solve issues such as unstable quality and variations in finishing depending on the operator!
We would like to introduce a case where Seiwa Kogyo Co., Ltd. thoroughly eliminated variations in the process and achieved stable quality. We addressed challenges such as variations in finish depending on the operator and increased defect rates during mass production. Through consistent condition management and standardization from prototype to mass production, we guarantee the same quality even when the person producing changes. 【Customer Challenges and Requests】 ■ There are variations in quality, and it is unstable. ■ The finish varies depending on the operator. ■ The defect rate increases during mass production. ■ Results cannot be reproduced even under the same conditions. ■ Quality complaints and rework occur. *For more details, please download the PDF or feel free to contact us.
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【Technical Innovations】 ■ Elimination of dependency through standardization of work procedures ■ Numerical management and visualization of welding and processing conditions ■ Ensuring positional accuracy and reproducibility of quality with dedicated jigs ■ Visualization and quantitative management of dimensional variation using a three-dimensional measuring machine ■ Thorough elimination of internal quality variation through welding penetration evaluation by etching ■ Continuous reduction of variation through accumulation of quality data *For more details, please download the PDF or feel free to contact us.
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Our company primarily focuses on welding processing of stainless steel sheets ranging from 0.3mm to 1.5mm, making it the core of our technology, and we have been dedicated to producing products that require precision and quality. We particularly excel in TIG welding of thin stainless steel and are optimizing both welding conditions and process design to address challenges such as distortion due to heat, melting, and appearance defects. In thin sheet welding, fine adjustments to conditions based on material properties, shapes, and required functions significantly influence quality. We conduct welding management that emphasizes the melting state and bead shape, achieving a balance between appearance quality and functional quality. We also ensure stable quality for areas requiring airtightness and durability. Additionally, we provide proposals from a manufacturing perspective that considers weldability from the design stage, suggesting optimal structures that take into account not only quality but also processability and reproducibility. We consistently support our customers' product development and manufacturing as a partner focused on solving technical challenges, from prototyping to mass production.