These pads hold the metal flat during the cutting process and keep the metal from plastically deforming. Fineblanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. The fine piercing process, referenced to the fine blanking principle, is used to produce the precisedimensioned holed parts with smoothcut surfaces over the whole material thickness in a single operation. The fineblanking process involves a total of three forces, which distinguish this technology from other punching or cutting processes. These presses incorporate hydraulic cylinders to control the stinger pressure and counter pressure, but main pressure blanking force is applied by mechanical force.
About fine blanking global expansion of human activity and the wave of motorization. In conventional piercing process, the hole surface features normally consist of the dieroll. It is included of fine blanking force, binder force and antistress. The fine blanking process with a steppededge punch was researched by finite element method fem and experiment investigation. Mar 14, 20 getting a better understanding of the fine blanking process. Material specific design guidelines are developed by companies in order to define the. Fine blanking pressure calculation and press selection3 total pressure of fine blanking is the total pressure needed for completing parts fineblanking, the main basis for the election of fine blanking. Fine blanking design guide free download as pdf file. Figure 3 and figure 4 show a schematic view of these systems. Our 20 fineblanking presses with total force ranging from 1,000 to 10,000 kn can process strip steel and nonferrous metal up to 20 mm thick and 450 mm wide.
Fb are hydrostatic pressure to metal, raised plastic deformation ability, and is sheared smoothly and it is used as a means to fabricate threedimensional form. Fine blanking design guide steel machines avaliacao. Unlike normal stamping, the fine blanking process yieldshighprecision serial. Fineblanking is known as an effective sheet metal forming process to obtain precisely blanked parts with smooth cutting surface. After blanking operation, the parts will be require secondary finish to smooth out burrs with bottom edge. Fineblanking handbook pages 1 34 text version fliphtml5. The extra tooling and machine costs that often accompany. Blanking is a cutting operation in which punched out piece is a component.
Fineblanking creates smooth, quadrilateral, crack and burrfree fineblanked surfaces, while the component itself is flat and level thanks to the clamping process. This article describes the three principal design features of the fine blanking process. The process requires a tripleaction fine blanking press. Because of the stability and precision of the process many secondary operations can be eliminated. Fineblanking is a process that provides parts with smooth edges and high accuracy. In the blanking process, some factors such as the punchdie clearance, the tool geometry and.
Research on fine blanking process with steppededge punch. The secondary operations such as shaving, reaming, and grinding are needed for achieving the smooth hole surface without any cracks. The fine blanking is the heart of automatic fine blanking production line,which usually consists of the above components equipments used fine blanking presses. Fine blanking technology is variant of stamping process, the main characteristics of it could be defined with two words, flow and shear. The vring is a raised vshaped ridge usually on the stinger plate that has the. These pads hold the metal flat during the cutting process and keep the metal from plastically deforming during punch entry. This vring requires extra stock material and press tonnage maximum of 40% of total blanking tonnage. Fine blanking is the only metal stamping process that can produce a gear in single operation. Fineblanking creates smooth, quadrilateral, crack and burrfree. The fine blanking division is certified isots 16949 by ul, usa us office sv industries, inc. Fineblanking requires the use of three very highpressure pads in a special press.
The fine blanking process creates highprecision fine blanked parts with cut surfaces that are smooth and free of tears. The fine blanking process is most method of blanking. Most fineblanking operations incorporate a vring into one of the highpressure pads. Shear force calculation shear force length of cut x thickness x. The working principle fine blanking of a typical spur gear is presented in fig. Sheet metal blanking process for forming of material. The extra tooling and machine costs that often accompany this relatively complicated tool design prohibit the economic use of fine blanking for number of applications. Mechanical and hydraulic fineblanking presses with the. Finite element analysis showed that the hydrostatic.
Fineblanking presses are similar to other metal stamping presses, but they have a few critical additional parts. Blanking tool design 3d model is created using catia software. The material influences extensively the quality of sheared edges and the. Jul 11, 2006 fineblanking requires the use of three very highpressure pads in a special press. What you need to know to get the best you can fine blanking. Fineblanking tooling is unique in its construction. A typical fine blanking tool is a singlestation compound tool for producing a finished part in one press stroke. Grinding milling broaching reaming gear hobbing forming shaving leveling. Ppt fine blanking division powerpoint presentation. Unlike normal stamping, the fine blanking process yieldshighprecision serial partswith excellent flatness and tight tolerances for dimensions, form and position. The finepiercing process, referenced to the fineblanking principle, is used to produce the precisedimensioned holed parts with smoothcut surfaces over the whole material thickness in a single.
A typical fineblanking tool is a singlestation compound tool for producing a finished part in one press stroke. It is also similar to stamping but differs in the sense that it uses two opposing. Pdf the fine blanking technology of cam were analyzed, its blank layout was designed, the fine blanking force was calculated and stamping equipment. The fine blanking process creates highprecision fineblanked parts with cut surfaces that are smooth and free of tears. In japan theoretical verification is done by professor emeritus at the university of tokyo dr. Tools are expensive for blanking so it is critical that the tooling be created correctly holding tolerances while minimizing scrap. Material analysis and design of the fine blanking product.
The relation between c content and tensile strength of fine blanking steels is shown in this table. This process is experimental and the keywords may be updated as the learning algorithm improves. Fineblanking can provide a significant cost savings. This ring also is commonly referred to as a stinger.
Fine blanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. International journal for ignited minds ijimiinds design. Partner for parts design, simulation, prototyping and. Customers of the group have the opportunity to custom make their own products according to their particular specifications and demands. T 3302531986 f 3302537375 3 lgbs present activities in blanking. Fine blanking allows, blank out and clean cut metal parts, without any tearoff and scars. Pdf knowledgebased system for strip layout design in. Study of the contribution of different effects induced by the punching process on the high cycle. Production scheduling process design at fine blanking. Fine blanking is a specialized type of blanking in which the blank is sheared from the sheet stock by applying 3 separate forces blanking force, holding force and ejector force fig. Closing force, counterpressure, and blanking pressure forces are individually and infinitely adjustable. When you look at some of the equipment and machinery that is out there, you have to wonder how some of things are built or made.
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