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Solutions for burrs in metal stamping parts

by:Fortuna     2021-03-07
With the development of science and technology, the terminals are getting smaller and smaller, and the requirements for stamping are further improved. In the production process of metal stamping parts, sometimes it is found that stamping parts have some burrs with different sizes and levels, which are harmful to product quality. The problem of burrs is something that metal stamping parts factories must pay attention to. So what is the cause of the burrs of the metal stamping parts? The following is a brief introduction for everyone. 1. The wound is blunt. Burrs can be produced when the blade is damaged, dull or gnawed. The factors that endanger the dullness of the knife edge are: 1. The surface of the abrasive tool, the material of the cavity, and the metal surface are poorly treated, and the wear resistance is poor; 2. The die structure is poor, and the rigidity is poor, which leads to gnawing injuries; 3. The actual operation Do not immediately moisturize and damage quickly; 4. Do not sharpen the edge immediately. Second, the gap. If the blanking gap is too large, too small or uneven, it can cause burrs. The hazard gaps are too large, too small or uneven due to the following factors: 1. Die processing deviation, die parts processing does not conform to the engineering drawings, the flatness of the base plate is not good, etc.; 2. Abrasive tool installation deviation, part of the guide has large gaps and unevenness Die installation is not the same; 3. The precision of the punching machine is poor, such as the gap of the slide rail of the punching machine is too large, the flatness of the bottom edge of the guide rail slider and the surface of the operating table is not good, or the stroke arrangement of the guide rail slider and the cabinet of the punching machine The flatness of the table is not very good, the rigidity of the operating table is poor, and the deflection value during punching can cause the change of the gap; 4. Installation deviation, such as the surface of the left and right bottom plate of the punching die is not cleaned during installation or is under the large and medium-sized punching die. The tightening method of the die is not good, the left and right die of the die are installed differently (especially the die without positioning pins), which causes part of the work to be skewed; 5. The structure of the die is unscientific, the bending rigidity of the die and part of the work is insufficient, and the punching force is unbalanced, etc. 6. The curvature of the thick steel plate is large, and the thick steel plate is uneven. 3. Unqualified stamping oil characteristics. Non-special product oils such as edible oil, mechanical lubricating oil, and reconstituted oil cannot meet the application requirements of stamping production and processing regardless of extreme pressure wear resistance, corrosion resistance, and refrigeration characteristics. It can cause problems such as burrs on product parts, corrosion of machinery and equipment, yellow bubbles, and employee allergies. Vulcanized rubber animal oil and vulcanized rubber oleate selected for special stamping oil are configured as key preservatives, which can be suitable for various types of machinery and equipment to carry out stamping, shearing and deep drawing of materials such as copper and aluminum, carbon steel, stainless steel, and titanium. And other processing technology. Fourth, the blanking situation is not good. For example, the blank (including the middle part) does not touch the mold base or cavity well. When the blanking and punching machine with poor positioning relative height, it will also be because the height of the part is less than the positioning relative Height, the shape of the part does not conform to the shape of the knife edge during the whole process of blanking, resulting in burrs. 5. The process performance of the parts is poor. The bevels with protruding or concave shapes are prone to burrs due to rapid damage. Sixth, the raw materials do not meet the requirements of the processing technology. The thickness of the raw materials is relatively severely deviated or the wrong materials (such as the wrong steel model) cause the relative gap to be unscientific and cause the parts to cause burrs. The above content is related to the burr caused by the metal stamping parts, I believe you have already grasped it to a certain extent. The burrs of metal stamping parts are generally caused in sheet metal blanking. According to the improvement of the process performance of the parts, the improvement of stamping standards can prevent the occurrence of burrs. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automobile stamping parts molds Learn more: Points to note in the design of continuous stamping dies (2)
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