Built for high production environments, FlexPower pulse tools provide durability, power and speed for most industrial assembly applications. To maintain consistent accuracy, the torque output for pulse tools must be verified periodically. You should also validate the actual torque being applied to the fastener by auditing the joint application. The goal for auditing is to verify adequate torque was delivered to the fastener and detect any loose fasteners or joint relaxation.
You need to validate the proper pulse tool is being used for the assembly application. Although a pulse tool has a specified torque range, the type of joint the tool is being utilized on is a key component. A pulse tool is a discontinuous tool and added adapters or extensions create a dampening effect, thus lowering torque values.
Torque measurement is paramount for many manufacturers. Simply running a fastener or bolt down until it’s snug and tight and assuming the torque control process is complete, is no longer sufficient. Measuring torque doesn’t stop once the assembly process is complete. As part of the overall quality control process, manufactures should include a “Torque Auditing” program. A method to detect loose fasteners or any signs of joint relaxation. Torque auditing validates the fastening process, the torque tool, the product design and the materials used for the application.
A single fastener, inaccurately or incorrectly tightened, can lead to the failure of a product, which impacts the bottom line.
Key reasons for conducting a torque audit:
- Substantiates assembly procedures reflect actual practice (what we say is what we do)
- Reveals the consistency with the assembly process (from person to person, or day to day)
- Uncovers inaccuracies with the assembly process so it can be quickly corrected
- Promotes ongoing corrective actions
- Process improvement
A torque sensor is a finely tuned instrument designed for testing and monitoring torque applications. Designed for torque evaluation and verification, a torque sensor is a laboratory grade instrument that is commonly used for quality control, R&D and calibration applications. A torque sensor is used in conjunction with a torque analyzer. For low torque auditing applications, a torque screwdriver sensor is an option. For higher torque needs, a torque wrench sensor is the instrument of choice.
The MTWD is a digital torque wrench that provides a digital display of torque readings. The tool is designed for screw tightening, fastener audit and general torque measurement and provides a visual, acoustic and sensory signal (handle vibrates) when the pre-set torque is reached.
The user-friendly MTWD digital torque wrench is a simple to use and displays real time torque values. The wrench offers four units of torque measurement: N.m, lbf.ft, lbf.in, kgf.m. Simply pre-set the desired torque value and apply force until the green LED illuminates and the handle vibrates. Great for light industrial, automotive, electronics and aircraft applications. Perfect for noisy environments.
The MTWD digital wrench is designed for an operator to easily program a pre-set torque value. The operator can set the tolerance parameters for the digital torque wrench to control the Go and No-Go response signal. The operator sets a lower and upper torque thresholds to get a visual, audible and sensory warning signals when the pre-set torque limits are reached or breached during operation. This function is primarily used for safety and quality control.
Controlling torque is essential for companies to ensure their product’s quality, safety and reliability isn’t compromised. The failure of a three-cent fastener that isn’t properly tightened can lead to catastrophic or latent failures. Fasteners that are insufficiently torqued can vibrate loose and excessive torque can strip threaded fasteners. Using a quality digital torque wrench has become increasingly important for many companies to ensure that proper torque is being applied and maintains gauge requirements associated with the ISO 9001 Quality Standard.
Torque measurement is utilized in three areas of assembly. Controlling torque is quintessential for companies to ensure their product’s quality, safety and reliability isn’t compromised.
Prior to Assembly Torque testing equipment, like electronic torque tester and torque sensors are used before assembly process for tool setup or conducting tool capability studies. For tool setup, the tool crib will want to set the torque tool according the torque specification required for the application. For tool capability studies, technicians need to ensure that the torque tool can provide the necessary torque and repeatability that’s required for a potential application.
The equipment used for this torque testing would be:
- Tabletop torque testers with built-in transducers
- Torque analyzer that connects with either stationary torque sensors or rotary torque sensors
- Joint simulators like run down adapters
During Assembly For air and electric assembly tools once the torque tool is being used in the production area, many manufacturers like to audit the tool and verify the actual torque being applied to the application or if the tool is starting to fall out of specification. The Rotary Torque Sensor is the ideal torque-auditing tool for testing the actual torque being applied on the assembly application. By connecting a rotary torque sensor between an electric or pneumatic tool and assembly application, you can monitor the torque being applied from the tool to fastener or bolt. This type of torque reading is called a dynamic torque reading. The rotary sensor is connected to torque analyzer, which records and stores the data.