The compression testing process is used to evaluate the reaction of materials towards increased compression, squashing, crushing, and flattening forces. They are particularly helpful in identifying the quality, consistency, design, and standards of the batch units.
As might be indicative from the nature of the process, it is exclusively used in aerospace, automotive, construction, cosmetics, and electronics industries above the rest. Working on the simpler principle of Young’s Modulus, this visibly humble machinery holds an important role in the designing and manufacturing of other mechanical goods for the utilization of humans. The set of steps used to operate a compression testing machine are as follows:
Equip Oneself with Safety Equipment
Before beginning the operation, it is necessary to put on the safety goggles and wear gloves. They prevent any pieces of the material from going into the eyes or bruising their hand skin, respectively.
Secure the Premises and Load the Material
Once, all the safety instructions are abided by, an open area must be selected for conducting the procedure. Then, the product to be tested must be carefully placed on the lower platen so that there is a considerable space left between the upper platen and the top of the compression testing machine. It must be put right in the center of the loading area. Once, the cylinder is comfortably placed, the machine cage must be closed and the piston must be set above the material top.
Check the Pressure Valve
Carefully turn off the pressure release valve to take out the extra stress on the machine components.
For an accurate reading of the material strength and for taking legitimate observations, it is necessary to check that the digital pressure calculators are set to zero. Also, ensure that the display unit is put on “Peak Hold” so that the machine can calculate maximum weight readings efficiently.
Adjust Pressure Pace Rates Accordingly
One can increase or decrease the pressure on the loaded material by turning the valve next to the piston-lever in a counter-clockwise direction. Simultaneously, the pressure and weight readings reflected on the display screen must be followed. One must keep on increasing the pressure (through the valve) to ensure that it matches with the Compressive Strength Calculation.
Observe the Results of the Test
The clear indicator of a successful test is breaking of the solid material into splinters and multiple cracks. The results of the compression testing machine can only be precise if the applied pressure value is determined by the amount that broke into observable damages. Once the signs are clear, one must bring the level back to its original position by pushing it away. The cage must be opened to collect the compressed material. Cleaning the loading area with a clean, soft cloth would help in performing another test conveniently. It is important to record the ultimate load (in pounds) reflected on the display screen immediately after removing the material.
Compression testing machines have been in usage for a long period of time. Even though their function is relatively trivial, it is equally important for the manufacturing process. This is so because it reflects on the nature and the quality of material produced by any industry.
In the case of aerospace and automobile industries, compression tests are highly necessary because the vehicles designed by engineers are expected to take responsibility for many human lives in the future. Any lag or negligence in the standard of the goods used in these industries can be very dangerous. So, in case of the compression testing machines, one can clearly say that simplicity is no indicator of performance.