A typical fineblanking tool is a singlestation compound tool for producing a finished part in one press stroke. This article describes the three principal design features of the fine blanking process. The vring is a raised vshaped ridge usually on the stinger plate that has the. Fineblanking handbook pages 1 34 text version fliphtml5.
The relation between c content and tensile strength of fine blanking steels is shown in this table. The secondary operations such as shaving, reaming, and grinding are needed for achieving the smooth hole surface without any cracks. Fine blanking allows, blank out and clean cut metal parts, without any tearoff and scars. Blanking is a cutting operation in which punched out piece is a component.
Fineblanking presses are similar to other metal stamping presses, but they have a few critical additional parts. 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. The working principle fine blanking of a typical spur gear is presented in fig. In the blanking process, some factors such as the punchdie clearance, the tool geometry and. Finite element analysis showed that the hydrostatic. Unlike normal stamping, the fine blanking process yieldshighprecision serial partswith excellent flatness and tight tolerances for dimensions, form and position. Most fineblanking operations incorporate a vring into one of the highpressure pads. 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.
Fine blanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. In conventional piercing process, the hole surface features normally consist of the dieroll. Study of the contribution of different effects induced by the punching process on the high cycle. 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. The process requires a tripleaction fine blanking press. Fineblanking requires the use of three very highpressure pads in a special press. Fine blanking design guide free download as pdf file. Pdf knowledgebased system for strip layout design in. T 3302531986 f 3302537375 3 lgbs present activities in blanking. The fineblanking process involves a total of three forces, which distinguish this technology from other punching or cutting processes. 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 cut surfaces showing only very small dimensional tolerances can be used without any secondary operations.
The fine blanking process creates highprecision fine blanked parts with cut surfaces that are smooth and free of tears. Fineblanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. What you need to know to get the best you can fine blanking. Sheet metal blanking process for forming of material. Figure 3 and figure 4 show a schematic view of these systems. Fine blanking fine blanking, is alternative for the is a unique development in the metal forming industry. The material influences extensively the quality of sheared edges and the. Customers of the group have the opportunity to custom make their own products according to their particular specifications and demands. These pads hold the metal flat during the cutting process and keep the metal from plastically deforming during punch entry.
These presses incorporate hydraulic cylinders to control the stinger. The fine blanking process is most method of blanking. In japan theoretical verification is done by professor emeritus at the university of tokyo dr. Fineblanking tooling is unique in its construction. Ppt fine blanking division powerpoint presentation. 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. Fineblanking can provide a significant cost savings. The fineblanking presses, 250 tons and below, are mechanical presses. Mechanical and hydraulic fineblanking presses with the. Material analysis and design of the fine blanking product. 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. Because of the stability and precision of the process many secondary operations can be eliminated. The fine blanking is the heart of automatic fine blanking production line,which usually consists of the above components equipments used fine blanking presses. These keywords were added by machine and not by the authors.
Fineblanking creates smooth, quadrilateral, crack and burrfree fineblanked surfaces, while the component itself is flat and level thanks to the clamping process. Fine blanking design guide steel machines avaliacao. Getting a better understanding of the fine blanking process. These presses incorporate hydraulic cylinders to control the stinger pressure and counter pressure, but main pressure blanking force is applied by mechanical force. Research on fine blanking process with steppededge punch. Closing force, counterpressure, and blanking pressure forces are individually and infinitely adjustable. Unlike normal stamping, the fine blanking process yieldshighprecision serial. The fine blanking process creates highprecision fineblanked parts with cut surfaces that are smooth and free of tears. Grinding milling broaching reaming gear hobbing forming shaving leveling. Fineblanking comes with cost savings because production is done in a single operation, and it can be used on a wide variety of metals to produce parts with many forms.
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. 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. It is also similar to stamping but differs in the sense that it uses two opposing. Production scheduling process design at fine blanking. If a part requires a high surface strength, it is advisable to fineblanking a low in carbon steel and to bring thepart afterwards to the required strength by casehardening. Partner for parts design, simulation, prototyping and. Jul 11, 2006 fineblanking requires the use of three very highpressure pads in a special press. After blanking operation, the parts will be require secondary finish to smooth out burrs with bottom edge. Fine blanking allows, blank out and clean cut metal parts, without any. The extra tooling and machine costs that often accompany. The fine blanking process with a steppededge punch was researched by finite element method fem and experiment investigation.
About fine blanking global expansion of human activity and the wave of motorization. Blanking tool design 3d model is created using catia software. This vring requires extra stock material and press tonnage maximum of 40% of total blanking tonnage. Tools are expensive for blanking so it is critical that the tooling be created correctly holding tolerances while minimizing scrap. Fineblanking comes with cost savings because production is done in a single operation, and it can be used on a wide. This process is experimental and the keywords may be updated as the learning algorithm improves. It is included of fine blanking force, binder force and antistress. This ring also is commonly referred to as a stinger. Fineblanking is a process that provides parts with smooth edges and high accuracy. The vring is a raised vshaped ridge usually on the stinger plate that has the same contour as the blanking punch and is located close to it, roughly a distance equal to 50% of material thickness. 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. Fineblanking is known as an effective sheet metal forming process to obtain precisely blanked parts with smooth cutting surface.
Fine blanking technology is variant of stamping process, the main characteristics of it could be defined with two words, flow and shear. International journal for ignited minds ijimiinds design. A typical fine blanking tool is a singlestation compound tool for producing a finished part in one press stroke. Mar 14, 20 getting a better understanding of the fine blanking process. These pads hold the metal flat during the cutting process and keep the metal from plastically deforming. After that we shall design a fine blanking tool, following production phases, like. Pdf the fine blanking technology of cam were analyzed, its blank layout was designed, the fine blanking force was calculated and stamping equipment. Shear force calculation shear force length of cut x thickness x.
744 681 958 529 1152 291 963 1574 495 446 1510 412 1649 768 1364 154 861 280 535 1560 1557 367 644 1101 181 643 549 1526 1395 1466 136 1200 1513 567 784 1482 62 861 257 1107 1106 1166 454 981 435 839