Cupping Testing Machine

If you are looking for the best testing instrument for testing the ductility of metals, then we suggest you go with Presto cupping testing machine. This is one of the best testing instruments that will help you to measure the draw ability of material especially the metal sheets. This testing machine from Presto has been equipped with an advanced set of features that makes it unique and easy to conduct the test. It has an amazing tabletop that is used to regulate the draw ability of metal components, painted metal sheets, and non-ferrous metal sheets. The instrument is used to perform accurate and reliable testing of adhesion, strips, hardness, the permeability of coatings of paints or varnish in metal sheets, etc. in sheet metal, metallurgy, rubber industry. PRESTO’s Cupping Machine is designed as per standards IS 10175 (Part I); 1993 & ISO 8490: 1986, ISO 1520:2006.

The metal sheet and strips will be tested to determine the stretch it is forming. The test consists of forming an indentation by pressing a punch with a spherical end against a test piece clamped between a blank holder and a die until a crack appears. The depth of the cup is measured. The Erichsen Cupping Machine is used to check the draw ability of sheet metal components and is manufactured strictly in compliance with ISO standards. The machine has a standard ball that is made to penetrate through a clamped sample sheet up to 2 mm thickness.

The main purpose of this testing machine is to determine the deep-drawing capability of sheet metals in accordance with (DIN EN 10139 and DIN EN 10130), which have a thickness of 0.1 mm to 2 mm and a width of 90 mm or more. Deep drawing (stretch forming) is the name given to the deformation process of sheet metal under biaxial stress. The sheet is deformed with a rigid tool. The sheet to be tested is clamped between the sheet holder and the die and formed with a hardened ball punch. This process is continued at a specified speed until a fine, continuous crack appears in the sheet. The distance traveled by the ball punch to the crack is referred to as the indentation value "IE" (in mm) and represents an important quality feature of the tested sheet metal.

Its high-quality rugged structure makes it easy for the users to conduct the test. With the help of this testing machine, you will be able to determine the level of deformation of metal sheets when they are subjected to external pushing force. Those who are working in the metal industry should make use of this testing machine to evaluate the quality of metal products. This testing machine not only helps metal manufacturers but also helps the paint industrialists to test the elastic properties of paint and study the development of cracks in the surface coating when a certain force is applied to it.

To conduct the test using the cupping testing machine, you can easily prepare the sample. For this, you can take a piece of a sample of a test specimen which you need to test. Whenever you head towards conducting the test, then make sure that the testing sample you take should not have a thickness of more than 2 mm. Once you successfully prepare the specimen, then you can start operating the machine. Here we have mentioned some essential steps for machine working.

• Insert the Zero plate in the sample holder slot and adjust the zero plate with the ball surface.
• Adjust the dial gauge to zero (0) at this position.
• Remove the Zero plate and fit it in your job sample in the slot provided.
• Tighten the sample through the Front-wheel handle.
• Now test the sample by rotating its side gear handle.
• View the condition of the sheet manually from the front side.
• Tighten the punching ball to the end position of the spindle bush.
• Always keep a view at the dial gauge to check the correct stiffness of the sheet.
• On failure of the sample, note the reading on the dial indicator/gauge.
• Release the pressure by moving the bigger gear wheel in the anticlockwise direction and then release the smaller gear wheel.
• Remove the sample from the sample holder slot.
• Analyze the test specimen for any kind of cracks.

In this way, you can easily operate this testing machine and improve the quality of metals. This test is very easy to perform and tells about the important aspects of metals. If you find any difficulty regarding conducting the test or need any assistance then you can give us a call.

Features of Cupping Testing Machine

Most of us get confused that whenever you conduct the cupping test, then whether this test should be used for metals or surface coatings. Well, the answer is that you can easily make use of this testing machine for both places. For metals, this test will be done to test the ductility while in the paint industry, this test will be done to test the elasticity of paints. Thus, you can take advantage of our testing instrument to perform the test. Here we have listed some of the amazing features of using Presto cupping tester.

• High-Quality & rugged structure with a corrosion-resistant body
• Revolving Handle for smooth movement of the punch
• Highly accurate test results
• Fast Mechanism with hand/manual operated wheel
• Dial gauge to measure the cupping strength of metals and paints
• Resilient & Sturdy Construction
• Brass Housing for strong sample clamping
• Single-handed hassle-free operation with Spherical punch

Technical specifications

• Range: 0 – 25mm
• Accuracy – ± 2%
• Outside Body: Mild Steel (Duly Powder Coated.)
• Sample Thickness – Up to 1.8mm
• Dial Gauge – 1
• Diameter of Punch – 20 ± 0.2 mm