Specimen blanking0 pages

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Zw/ck/Roell

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Zwick

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Materials Testing

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Product Information

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Specimen blanking machines for specimen preparation of metals

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Hydraulic specimen blanking machine type M-Cut 65

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Hydraulic specimen blanking machine type RZ 100

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Range of application

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Nowadays test pieces from steel sheet and metal foils

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are economically and accurately produced using speci-

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men Planking machines. The standards, e.g.

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ISO 6892, ASTM A 370, ... stipulate that the test results

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must not Pe influenced by any material change caused

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by strain-hardening at the test piece edge zone.

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Numerous structural examinations of steel sheet have

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shown that the strain-hardening zone along the cut-

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ting line is generally a maximum 10 % of test piece

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thickness. This is achieved by a low cutting speed and

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special blanking tool design and offers substantial eco-

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nomic advantages in the event of subsequent grinding.

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In this way high specimen quality is ensured.

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We offer following models:

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C-shape specimen blanking machines

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(M-Cut 65)

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The open shape of specimen blanking machines and

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blanking tools (C-shape) also allows specimens to be

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taken from panels. If several blanking tools are used

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the roller table version of the table extension is recom-

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mended: So blanking tools not being used at that time

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can be put aside. With table extension, tool changes

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take about 20 seconds, offering significant time-savings

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where tool changes are frequent.

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The blanking machine M-Cut 65 (with a compressive

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force of 650 kN) is suitable for the material thicknesses

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0.04 to 6 mm (depending on tensile strength and speci-

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men shape).

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O-shape specimen blanking machines

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(RZ 100/ RZ 150)

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The closed shape (O-shape) requires pre-cut strips

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70 ... 80 mm wide. These specimen blanking machines

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are already equipped with a table extension.

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Blanking tools

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Blanking tools can be produced exactly to customers'

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requirements, an example being tools made from a spe-

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cial steel which were produced with additional guides

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to enable dumbbell specimens to be punched from foils

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with a thickness of 0.04 mm and a tensile strength of

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2,150 MPa. Depending on the strength of the material,

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between 20,000 and 150,000 specimens can be pro-

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duced with the tools, which can then be re-sharpened.

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Advantages/f eatu res

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• Fast, cost-efficient production of tensile specimens

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• No specialists required - anyone can operate the

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machine after a brief training period

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• Manufacture of very high-quality specimens by

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finishing with a specimen grinding machine

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• Robust, easily maintained machines

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• Long edge life of the blanking tools and possibility of

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repeated resharpening

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