Fine-Blanking is an advanced and precision stamping process, by which a component with precise geometry and smooth cut surface can be produced without any further major secondary operations.
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In the early 1923, the Fine-Blanking technology was invented by Mr. Schiess in Germany. However, this technology was purely and secretly applied in Watch industry at that time. Until the 1950, the Fine-Blanking press was produced and the technology had been published. In the earlier 1960, the application of the technology was extended from Watch industry to Light industries; also from Western countries to Eastern countries. From the 1970, this technology had been widely applied from Light industries to Heavy industries. In 1980, there were over 2800 sets of the Fine-Blanking Presses in the world.
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Compared with the Fine-Blanking, the clearance between the punch and the die is larger in the Conventional Stamping as shown in Figure 1. In addition, there are no vee-ring force and counter force. As a result, the components produced by the Conventional Stamping are found to have about 1/3 shearing edge and their shape is bowed whilst those produced by the Fine-Blanking are found to have 100% shearing edge, flat shape and accurate dimensions. Furthermore, in applying the Fine-Blanking Technology, the clearance between the punch and the die is much smaller, as shown in Figure 2, together with the imposed vee-ring and counter forces.
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| Figure 1 | Figure 2 |
The component produced by the Fine-Blanking is much superior than the one produced by the Conventional Stamping, as shown in Figure 3 and 4.
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| Figure 3 | Figure 4 |
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By applying the Fine-Blanking technology, the significant improvement of the component should be obvious. As the components are with good shape, smooth surface and precise size, they can be ready for assembly without any further secondary operations. The productivity is increased, the production cycle time and the component cost are significantly reduced.
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Using the Fine-Blanked Presses with the special construction Die, Fine-Blanked
products can be produced effectively.
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Hydraulic Press |
Tools and Die |
Tools and Die |
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The Fine-Blanking has been used in Automotive industry such as door locks, gear boxes, reclining seat adjusters, etc. Furthermore, the Fine-Blanking can also be applied to Electronic and Electrical Industry.
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