Quality Control
Quality Control Beyond the Production Line
At Yoshiwa Kogyo, quality control is not limited to final inspection.
We focus on maintaining and improving the quality of products throughout the entire production line—before they are shipped from the factory.
This is achieved through three key pillars: process control, quality verification, and quality improvement.
We emphasize proactive measures to ensure that each process stays in a stable and optimal state, enabling us to build quality into every product we make.
Quality Control
Quality Control Activities
Process Control of Cast Products (Chemical Composition)
During the melting process, we use spectrometers to analyze both the ladle and final product compositions.
This ensures consistent control over the chemical makeup of cast components, helping us maintain high product reliability.
Quality Verification of Machined Products (Functional Characteristics)
For characteristics that affect vehicle performance, we perform 100% inspection using automated measurement systems.
This approach ensures precise, reliable evaluation of each machined component's critical quality attributes.
Quality Improvement of Cast Products (Sand Inclusion Reduction)
To reduce quality variation caused by human error during core setting, we have introduced robotic systems.
This automation improves consistency and reduces the risk of defects caused by improper manual setup.
