[Case Study of Micro Separator] Improvement of Cp Value through Purification of Operating Oil
The partition board was installed using the mounting bolts of the micro separator.
This time, we would like to introduce a report stating that the process capability index (Cp value) of lathe machining has dramatically improved due to the purification of hydraulic operating oil. The single-spindle lathe is a type of automatic lathe that rotates bar stock to cut its outer shape. It automatically chucks the bar stock processed to a specified length, performs rough cutting of the outer shape, and then carries out finishing cuts. The cleanliness of the hydraulic operating oil was classified as "outside grade" according to the NAS standard, and the equipment's Cp value was 0.65 (estimated defect rate: 22%), indicating that rework on the processed products was necessary. A partition plate was installed using the mounting bolts of a microseparator. The drain from the pump was also modified to return to the oil return side. As a result, after three months, the cleanliness of the hydraulic operating oil improved to grade 9 according to the NAS standard, and the equipment's Cp value increased to 0.96. After nine months, it reached grade 8, and the equipment's Cp value improved to 1.33. 【Case Summary】 ■ User: X Parts Manufacturer ■ Machine: Single-Spindle Automatic Lathe (Roll Forming Diameter Processing) ■ Tank: 60L ■ Products Used: Two units of MSR-200 model *For more details, please refer to the PDF document or feel free to contact us.
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