In terms of crimp quality testing, two different types of tests are recommended by IPC and the Wire Harness Manufacturer's Association (WHMA). They are the pull-force test and the crimp height test. To meet Class II standards, you must perform sufficient pull-force testing on all crimping projects.
The best test of your crimp is to measure the length of a loaded round and then push it head first against the wall as hard as you can. Measure it again. If there is no decrease in length then everything is good.
Tensile testing is a great way to evaluate the integrity of the crimping process and the strength of crimp wire assemblies. This method often involves using tools such as a manual/motorized pull tester or a digital force gauge to measure the force required to separate a crimped terminal from a wire.
A pull test is a reliable method for checking the mechanical strength of a crimped connection. the test involves exerting a tensile force on the wire perpendicular to the crimping direction. the force required to cause the wire or crimp to fail determines the strength of the connection.
Crimp connection is a gas-tight joint formed by compression between electrical components (most often wires and cables) and a specifically designed crimp termination or splice band. Compressed terminal reshapes all strands in a wire like it is cold-welded to create a low resistance solderless electrical connection.
Crimping Standards are a set of guidelines that dictate the proper ways, techniques and tools for making crimped connections. They ensure that crimped connections are correct, consistent and meet specific performance criteria, regardless of the manufacturer or tool used.
Both these incorrectly crimped terminals can cause overheating and ultimately lead to termination failure or fire. The over crimped lug is easily identifiable by the 'ears' or 'wings' of created on the barrel of the terminal. The under crimped lug is identifiable by inspection of the lug and conductors.
So the question that arises is “Should I calibrate my crimp tool?” The answer in the question would be “yes”, although a crimp tool cannot actually be calibrated since it is not a measuring device. But it can be adjusted and verified against the manufacturer's specifications.
The Crimping Test Stand is a device designed to accurately and reliably evaluate the clamping force of a crimp. This tool facilitates destructive testing by gauging the maximum breaking force a crimp can withstand before giving way.
Typically, crimped hair can last 1-2 days. The look can last longer on people with naturally curly and wavy hair, as it doesn't overly disrupt the natural flow of your locks. The right hair care and finishing sprays can also help to ensure longer hold and styling.
Too loose a crimp will result in poor mechanical performance and electrical conductivity. Too tight a crimp may improve electrical performance up to a point, but can damage the terminal body or wire strands, causing a reduction in crimp tensile strength and/or vibration resistance.
The two most common joining methods — soldering and crimping — provide high-quality, long-lasting connections when performed by experienced technicians, but there remains a persistent debate about which is better. A good argument can be made for each one, but crimping is the preferred choice for most applications.
Verify the connection with the Go/No-Go gauge included with your crimp tool. The Go side of the gauge should tightly slide over the crimp ring connection and the No-Go should not slide over the connection at all.
Look for any bends, twists, cracks or sharp edges that could cut into your synthetic slings. To check for less-apparent deformities, measure the hook's throat opening. (Note: Typically this is not done during pre-operational inspections.) You should remove the hook from service if any distortion is noticeable.
The best practical way to test for electrically bad crimps is to first perform a standard continuity and resistance check (Fig. 1), followed by an intermittent connections test where signals are constantly sent through the cable while you flex the connectors and apply stress (including pull) to the cable itself (Fig.
To calibrate the tool, remove the eccentric set screw. After screw is removed, push the eccentric up and turn it to adjust the handle width. Make sure to check the width as you adjust. Tighten the eccentric set screw until it is secure and perform a test connection.
In terms of crimp quality testing, two different types of tests are recommended by IPC and the Wire Harness Manufacturer's Association (WHMA). They are the pull-force test and the crimp height test. To meet Class II standards, you must perform sufficient pull-force testing on all crimping projects.
Poorly crimped connections can lead to a variety of issues, such as an electrical short, an open circuit, or a weak connection. Poor quality crimps can cause corrosion, intermittent or poor performance of the connection, and even complete failure of the connection.
Serrated or dimpled wire barrels provide maximum contact and tensile strength after crimping, and color coded insulation with wire size stamped on the terminal tongue identifies the product and assists in proper terminal-wire match.