【Problems with Sheared Surface Quality?】
In press processing, issues such as rough sheared surfaces, large burrs, and the need for secondary machining often occur. For parts related to fitting or sliding, shear surface quality directly affects performance and assembly accuracy. Conventional blanking can create fracture surfaces and dimensional variations, leading to additional grinding or machining.

【What Is Shaving】
〈Finishing after shearing〉
Shaving is a precision shearing method that removes a small allowance after the initial blanking process. By cutting away the fracture surface, the edge becomes almost entirely smooth sheared surface.

Benefits include:
・Smoother shear surfaces
・Improved dimensional accuracy and perpendicularity
・Reduced burrs
・More stable fitting performance

【Importance of Die Design and Press Technology】
Effective shaving requires optimized clearance design, material understanding, cutting allowance, die rigidity, and press accuracy.
Kawamura Kikai Co., Ltd. supports die design, manufacturing, and maintenance in-house, enabling integrated optimization of shearing conditions and die specifications. The company operates 50 press machines (10–500 t) for various press processes.

【Typical Applications】
Precision shearing with shaving is suitable for:
・Gear and ratchet components requiring precise tooth profiles
・Shaft fitting holes needing high roundness and perpendicularity
・Thin precision parts requiring minimal burrs
・Reference holes for welding or riveting processes
Stable shear quality reduces assembly variation and defects, and can minimize additional machining processes.

【Key Considerations】
Although shaving requires more complex die and process design, its value lies in overall process optimization, such as:
・Reducing secondary machining
・Preventing assembly defects
・Improving dimensional stability in mass production

【Summary】
Sheared surface quality strongly affects product performance and assembly.
Precision shearing using shaving can improve edge quality while simplifying the overall manufacturing process. For issues related to burrs, rough edges, or excessive machining, reviewing the forming process may provide an effective solution.

【Contact Information】
Kawamura Kikai Co., Ltd.
Head Office: 2-4 Shimizu-cho, Itabashi-ku, Tokyo 【Composite Division】
Hanazono Factory: 10 Kitane, Fukaya-shi, Saitama 【Metal Press Division】
Website: https://www.kawamura-kikai.co.jp
Inquiry / Quotation: https://www.kawamura-kikai.co.jp/contact/

Consultations on precision shearing and shaving technologies are available even at the early evaluation stage. Please share your processing requirements or technical challenges, and we will propose suitable solutions.
Related URL: https://www.kawamura-kikai.co.jp/product/