An area of the primary focus of our company is quality control. Hence, our testing laboratory has the latest equipment used to conduct regular inspections. Our lab technicians frequently calibrate the equipment being used to get correct readings in test results. Our equipment can meet the requirements of different regulatory bodies, including the - ISO, BS, ASME, ASTM, and ANSI. Industries such as Aircraft, Petrochemical, Oil and Gas, Power Generation as well as the Rail and Motorsports industries, enlist the support of our tech lab for accurate results.
Measuring With Vernier Calipers
The fasteners produced here undergo both product and chemical analysis, via a series of stringent test methods. All alloys, including the ferrous and non-ferrous variety, undergo checks for conformance to their chemical composition. Especially, per the specification, they follow.
Some ASTM specifications mention the need for performance of non-destructive tests on the fasteners. These fasteners test according to the BS EN ISO 9712 and undergo several tests. For instance, this standard dictates the need for tests like ultrasonic, radiography, radiographic interpretation, dye penetration inspection, and magnetic particles.
In addition to the chemistry, the corrosion resistance properties of the alloys used in their manufacture will undergo testing successfully. The corrosion tests performed on the fasteners to check their resistance properties are as follows - painted finishes, adhesion tests, plated finishes, salt spray, and lastly, humidity testing and the thickness of the coating.
In terms of the mechanical tests performed on the fasteners, the most important one is finding its tensile strength. Checking the tensile properties of said components is the main task of our competent QA's at ambient and higher temperature settings. These fasteners are subject to impact testing at cryogenic temperatures and ambient temperatures. Some specifications also need conformance for hardness testing and bend tests. Testing fasteners at varying temperature levels is mandatory in regards to its longevity and performance, which would hold proof of the bolt's propensity for performance under extreme conditions. In our laboratory, we have provisions for testing fasteners under all three circumstances. Our temperature-controlled environment is conducive to achieving optimum results for the tests conducted.
Our lab also yields an exact result during the microstructure check of the fastener. Therefore, they are subject to tests like grain size, coating thickness, hardness depth, and heat treatment effectiveness in our lab.
There is different ISO certified equipment in our lab for testing. Some of these include hardness testing, ultrasonic measurement, Thread Plug Gauge, etc.
Laser measuring equipment - This device that is a part of our lab is non-contact and has sensors to detect high precision, place, and measurement.
Laser beam Thread sorting - This equipment uses 3D observations to detect defects from multiple laser beams. The accuracy of this instrument is such that it can detect a flaw that is present on one side of the part like damaged threads.
Thread plug gauge - This device examines the acceptance of a nut on an internal parallel threaded fastener. The design of this device checks the accuracy of the diameter of a pitch. For minor threaded parts, the instrument will be double-ended, with one terminal to hold the go gauge, since the other terminal will house the no-go. For a large part, the two can be separate pieces.
Ultrasonic measurement equipment - For critical bolting applications, factors like friction or bolt and joint geometry are such that the quantified applied torque singularly will not offer the degree of accuracy. Accuracy requires issuing control over the preload; monitor over the work-life of the fastener. In these applications, quantification of fastener elongation or load by this equipment has regularly proven to be the most accurate, efficient as well as a cost-effective solution. Measuring bolt preload by this device is possible by the introduction of a sonic pulse at one end of the fastener; while precisely measuring the time of flight required to reverberate from the other end. The equipment converts material constants, for instance, the flight time into the ultrasonic length of the fastener. Thus, providing a baseline from derived future calculations. The time of flight will change once it is tight. And the equipment will be repeated using material constants. This repetition terminates the effects of both stress and temperature variations on sound speed, thereby receiving precise elongation or load measurements.