Manual Weld Coupon Bending Fixture for Power-Free Destructive Testing
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Solution Overview
Problem
Current metal fabrication processes lack a device capable of determining weld quality without relying on external power sources for bending and breaking weld coupons.
Innovation Solution
A manual weld coupon destructive test device that uses a support base, plunger, and guide shoes to bend and break weld coupons, eliminating the need for electricity or hydraulics, and allowing for interchangeable guide shoes and plungers to produce various shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If external power sources (electricity, air, or hydraulics) are used to bend and break weld coupons, then sufficient force can be applied to deform the metal, but the device becomes complex and requires infrastructure support
Solution Approach 1:
The device is divided into separate functional components: a support base for stability, a plunger for applying force, guide shoes for shaping, and a handle for manual operation. This segmentation allows each component to be optimized independently while maintaining overall simplicity and portability.
Solution Approach 2:
The device uses manual operation where the user directly applies force through the handle to the plunger, eliminating the need for external power sources. The system serves itself by converting human mechanical energy directly into the bending force needed for the weld coupon test.
2Reliability
If external power sources are used to operate the bending device, then consistent and controlled force can be applied, but portability and ease of deployment are reduced
Solution Approach 1:
The device is designed to be manually operated without external power sources, making it portable and easy to deploy in the field. The consistent force application is achieved through the mechanical advantage of the lever-style handle and the guidance provided by the guide shoes, which ensure proper positioning and force distribution.
Solution Approach 2:
The device allows for adjustable force application through the handle mechanism, enabling the operator to control the bending force by adjusting the leverage and speed of handle operation. This provides sufficient reliability for testing while maintaining portability.
3Device complexity
If fixed guide shoes and plungers are used in the device, then the structure is simple, but the device can only produce one shape
Solution Approach 1:
The device incorporates interchangeable guide shoes and plungers that can be attached to the same base structure. This allows a single device to perform multiple functions and produce different weld coupon shapes (such as U-bend, overbend, and nick break configurations) without requiring complex adjustment mechanisms.
Solution Approach 2:
The guide shoes and plungers are designed as separate, interchangeable components that can be easily attached and removed from the support base. This segmentation maintains the overall structural simplicity while enabling versatility through component interchangeability.
4Ease of operation
If a manual operation mechanism is designed into the device, then portability is improved, but the force that can be applied is limited
Solution Approach 1:
The guide shoes feature curved surfaces that conform to the desired bend shape, allowing the manual force to be efficiently distributed and applied at optimal points on the coupon. This curvature design maximizes the mechanical advantage and ensures consistent bending results.
Solution Approach 2:
The handle is designed with a lever mechanism that allows the operator to apply force dynamically, using body weight and leverage to generate sufficient bending force. The plunger moves along a guided path that ensures force is applied efficiently to achieve the required deformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient, portable, and power-independent weld coupon testing, ensuring robust operation under diverse conditions and reducing the need for extensive training or infrastructure.
Implementation Method 1
A plunger is connected to the support base and is movable along a length of the support base by a handle mounted to rotate on a pivot base on the support base. A header on the support base has a guide surface configured to press a weld coupon between the guide surface and the head of the plunger.
Implementation Method 2
A plunger is connected to the support base and is movable along a length of the support base by a handle mounted to rotate on a pivot base on the support base.
Implementation Method 3
A guide shoe is configured to fit against the guide surface of the header, the curved guide shoe has a first face and a second face, the first face is curved to conform to the head on the plunger, and the second face is curved to conform to the curved guide surface of the header.
Data Source
AI summary
A weld coupon destructive test device includes a support base. A plunger connected to the support base and movable between a first position and a second position along a length of the support base. A handle to operate the plunger between the first position and the second position. A header on the support base, the header configured to press a weld coupon between the header and the plunger, the header having a first support end and a second support end, the header having a depression formed between the first support end and the second support end. The weld coupon rests between the first support end and the second support end of the header, and the weld coupon is pressed into the depression formed between the first support end and the second support end of the header.