Recent updates for the tensile testing machine

TL;DR

The video discusses upgrades to a tensile testing machine, focusing on the new cross head, grip, and bearings.

Transcript

welcome again in this video I am going to talk about the new updates of the tensile testing machine especially about the new cross head and the new grip and there will be some further updates which I will do so I want to talk about these things so firstly I have you cross heads now almost the same design as previously so we have the nuts for the le... Read More

Key Insights

• 🤕 The inclusion of a load cell in the cross head allows for precise force measurements during tensile tests, enhancing data reliability.
• 🎰 Switching to solid support bearings is critical for ensuring the machine can withstand the necessary torque without compromising stability.
• ✊ Considering motor upgrades is essential for improving both power and control during testing processes, which directly affects testing efficiency.
• 🫷 The presenter plans to conduct tests that push the machine to its performance limits, evaluating its capability to handle maximum forces.
• 🎰 A more robust setup will potentially extend the lifespan and effectiveness of the tensile testing machine, contributing to greater experimental fidelity.
• 🎰 Regular updates and modifications to the machine indicate a responsive approach to engineering challenges and continuous improvement.
• 👻 Incorporating Arduino for data monitoring allows for a more versatile and customized approach to testing and analysis.

Questions & Answers

Q: What specific updates were made to the tensile testing machine's cross head?

The cross head design is similar to previous versions but now includes a load cell, capable of measuring forces up to 5 kilonewtons, providing real-time data during tests. The cross head features a nut for adjustments and allows for precise alignment when attaching samples, enhancing overall testing accuracy.

Q: Why were the existing pillow bearings deemed insufficient for the machine?

The pillow bearings were designed primarily for radial forces and could not adequately handle the torque from the gears, which led to bending and instability. This flawed performance could result in inconsistent test results, necessitating a switch to stronger support bearings that can withstand actual forces and stabilize the setup.

Q: What new motor options is the presenter considering for the machine?

The presenter is considering replacing the current NEMA 17 stepper motor with either a powerful DC motor with a significant gear ratio or a stronger NEMA 23 motor, which would deliver higher torque. The aim is to improve the overall performance of the tensile testing machine, providing better control and reliability.

Q: How will the new setup improve the testing capabilities of the machine?

The new bearings, stronger motor options, and better alignment of gears will generate a more stable and rigid structure for the tensile testing machine. These enhancements will facilitate more accurate and reliable measurements, ensuring the machine can effectively test the limits of various steel specimens.

Summary & Key Takeaways

• The video outlines enhancements made to a tensile testing machine, including a newly designed cross head and improved grips that incorporate a load cell for accurate force measurement during tests.

• The presenter highlights issues with current bearings used in the machine, which are inadequate for handling torque; a solution involving solid support bearings is proposed to enhance stability during testing.

• Future improvements are explored, particularly regarding motor upgrades for better performance and reliability, including considerations for using a more powerful DC motor compared to the current stepper motor.