quality problems countermeasures
发布日期：2013-12-03 17:12:22 点击量：2476 信息来源：Creation
Quality problems cause analysis solution
1. Parts of light belt is too wide, dentate burr, cutting clearance is too small, reduce the blanking die, punch or increase the die of punching die and ensure reasonable clearance
2. The rough section rounded big parts, bright with small, elongated, burr, cutting clearance is too large, replace or repair the blanking die, punch or die of punching die and ensure reasonable clearance
3. Parts of light is uneven or with burr of the slope, uneven blanking clearance, repair punch or die and adjust to the gap evenly
4. What causes stamping burr maintenance (1). Design or line cutting clearance is not reasonable (2). The material and improper heat treatment, die down cone or not sharp edge (3). Stamping wear or punch too deep into the concave die (4). To be inaccurate or improper operation guide structure (1). The specification design and line cutting clearance (2). The reasonable material selection, working parts of die materials with hard alloy, reasonable heat treatment (3). Grinding punch or insert, adjust punch into the depth of the concave die (4). Guide pin guide sleeve and repair the mould punch guidance accuracy, standard press operators
5. Why jump when punching waste, punch die gap is bigger, stamping speed is too high, the shorter, the influence of the material (hard, brittle), stamping oil viscosity or oil droplets too attached to the role, pressing and vibration producing material spread crumbs, vacuum adsorption and die core is not sufficiently degaussing, etc all can cause the scraps to the mold surface (1). At the top of the punch upon pole jump to prevent waste and practical waste (2) to compare rules. Grinding punch head into aliens, suitable for thin materials such as stainless steel (3). Design increases the complexity of the waste (4). Order other factors
6. At the mouth. The guide pillar and guide bush clearance is too large (2). Push on a piece of hole is not vertical, deviation (3). Make the small punch punch or not vertical guide pillar installation (4). The parallelism error accumulation (1). Repair or replace the guide pin guide sleeve (2). Repair or replace the ejecting block (3). Reassemble, guarantee the verticality (4). Grinding and assembling
7. Stripping is not normal. Stripper and punch with tight, stripper tilt to improper device (2) or other materials. Spring or rubber elastic enough (3). Die blanking hole and the mold base hole without leakage for (4). The die has a back taper (1). Repair materials, stripping screw combination with casing and inner hexagon screws (2). Replace the spring or rubber (3). Trim leak hole (4). The trimming die
8. Artifacts have indentation (1). At the bottom of the strip or mold surface with scraps, oil (2). The mould is not smooth surface (3). Parts surface hardness is not enough (4). The material strain and instability of (1). Remove waste oil (2). Improve the mold surface finish (3). The surface plating chromium, carburizing, boronizing (4). Reduce the lubrication, increase the compressive stress, adjust the spring force
Curved surface parts, after 9. Blanking die with inverted cone or roof and contact area small parts, die of repair, adjust the roof
10. Workpiece distortion (1). (2) the material internal stress. Uneven force at the time of the parts (1). To change the layout or normalizing treatment (2) for the materials. Adjust the mould to make the normal work of the roof
11. The workpiece forming part of the size deviation, modified the mold and the feeding accuracy interval
12. Each batch of parts, the error between random checks on each batch of materials and distinguish before use
