304 stainless steel stamping parts are widely used in many industrial fields, and their edge quality has a key impact on the performance, appearance and subsequent processing of the product. As a common processing method, shearing process has an in-depth study of its impact on edge quality and explores improvement measures.
Shearing is a process that separates the sheet along a predetermined contour through the relative movement of the upper and lower blades. When shearing 304 stainless steel stamping parts, the blade exerts pressure on the sheet, causing the material to shear and deform until it breaks and separates. In this process, the internal stress distribution of the material is complex, including shear stress, tensile stress and extrusion stress.
Burr formation: During the shearing process, burrs are easily generated on the edge due to the plastic deformation and fracture characteristics of the material. Burrs not only affect the appearance of the product, but may also cause scratches, interference and other problems in subsequent assembly or use.
Edge flatness: If the shearing process parameters are improper, such as uneven or excessive blade gap, the edge of the stamping part will be uneven, wavy or stepped, affecting the dimensional accuracy and coordination with other parts.
Cold work hardening: Plastic deformation during shearing causes cold work hardening of the edge material, increasing hardness and reducing plasticity, which may cause difficulties in subsequent bending, welding and other processing procedures, and even cause cracks.
Micro cracks: In areas where shear stress is concentrated, especially when the blade is worn or defective, micro cracks may occur, reducing the fatigue strength and corrosion resistance of the product.
Reasonable adjustment of the blade gap is the key. If the gap is too small, it will increase tool wear and may tear the plate; if the gap is too large, it will cause more burrs and uneven edges. According to the thickness and performance of 304 stainless steel, the optimal blade gap range is determined through experiments and simulations. At the same time, control the shearing speed to avoid excessive impact and vibration caused by too fast speed, which will affect the edge quality.
Choose high-quality, sharp and suitable tools for 304 stainless steel. Sharp blades can reduce shear force and plastic deformation, reduce burrs and cold work hardening. Check and maintain the tools regularly, sharpen or replace the tools that are severely worn in time to ensure the sharpness and geometric accuracy of the blade.
For the burrs that have been generated, deburring processes such as mechanical grinding, chemical polishing or electrolytic deburring can be used to remove them. For the problem of cold work hardening, appropriate annealing treatment can be carried out to eliminate the hardened layer and restore the plasticity and toughness of the material.
The shearing process of 304 stainless steel stamping parts has many effects on the edge quality. By optimizing the process parameters, reasonably selecting and maintaining the tools, and adopting subsequent treatment measures, the edge quality can be effectively improved, the comprehensive performance and market competitiveness of the products can be improved, and the demand for high-quality stainless steel stamping parts in industrial production can be met.
