Strong & tough, accurate & appropriate
Maintaining a stable supply is critical for quality management. DOHI has made efforts for better quality management by strictly examining production processes, products, and materials and constantly promoting the development of workers' skills.
Maintenance
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Although providing consistent products and services is necessary to create a stable supply, variations will still occur to some extent. DOHI establishes the quality control process and inspection criterion based on a sophisticated manufacturing process. We promote a stable supply system by testing our "4 M's": manpower, machine, material, and method. |
Inspection system
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It is also important to increase the accuracy of individual tests. Using sophisticated inspection equipment, DOHI implements thorough inspections during each production process: material-quality check, hazardous substance check, impact test, sample-cut check at the high frequency hardening process, etc. |
Human resources development
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Fostering human resources is another pillar of the quality management system. DOHI has supported the staff to acquire skills on a company-wide basis and produced many technicians qualified by a state or our prefecture. DOHI's high quality of products is supported by those "masters." |
Our staff owns licenses of technologies in
Machine works / Milling machine / Machining center/
Hobbing machine/ Centerless grinding machine
Metal heat treatment / General heat treatment /
Induction hardening / Cyanide hardening /
Metallographic structure /
Mechanical inspection / Machine maintenance
Metal painting etc.
