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A tonnage limit tells you the range of material thicknesses that you can draw, punch, blank, or process. Some common capacities of gap-frame presses are 121 to 176 tons and 400 to 600 tons for straight-side models; however, the stamping industry produces such a variety of products that specific tonnages are hard to pin down. […]

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Raw material properties have a major effect on the stamping process and die design and are expressed as a percentage of the clearence and calculation force press machine. Properties of Raw Materials Material Shear Strength (kgf/mm2) Tensile Strength (kgf/mm2) Soft Hard Soft Hard Lead 2~3 2.5~4 Tin 3~4 4~5 Aluminum 7~11 13~18 8~12 17~22 Zinc […]

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Types and characteristics of tool steels Steel materials used to make the dies also called tool steel is used for cutting steel, slide or shape material. They may be either carbon or alloy steel. Steel in the low carbon content (0.7 to 0.9%) was used for equipment subject to shock, and high carbon steel tools […]

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Punch Press Perforation is generally the most severe operation performed in a die. That’s because the punch press applies forces ranging from a few tons to more than 1000 tons. Proper press alignment is essential. While die set has some effect on alignment during operation, it cannot offset poor press alignment. Simple Die A simple […]

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Die Clearance Die Clearances have a major effect on the stamping process and are expressed as a percentage of the work piece thickness. Die Clearances within this presentation will be expressed in terms of total die clearances and will have to be divided by two if die clearances per side are required. Die Clearance Guidelines […]

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Sheet metal processes can be broken down into two major classifications •Shearing processes — processes which apply shearing forces to cut, fracture, or separate the material. •Forming processes — processes which cause the metal to undergo desired shape changes without failure, excessive thinning, or cracking. This includes bending and stretching. 1. Shearing Process 1.1.Punching: shearing […]

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7 Examples Of Sheet Metal Forming Steel metal forming is the process by which flat and thin pieces of metals are created. These are manipulated in various ways so it can be produced in different shapes and is used for the construction of varieties of items and materials. The sheet metal’s thickness is known as […]

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Sheet metal work with CNC Punch tools and CNC Punch Presses Computer numerically controlled (CNC) punching is a manufacturing process that is carried out by CNC punch presses. These machines can be either a single head and tool rail (Trumpf) design or multi-tool turret design. The machine is basically programmed to move a sheet of […]

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