Spot Welding Tongs Guide Stop for Precise Electrode Positioning
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Solution Overview
Problem
Manual operation of spot welding clamps can lead to positioning inaccuracies due to natural shifts, resulting in suboptimal welding points, especially in areas with vehicle openings, which can weaken welds and damage surrounding seals.
Innovation Solution
A spot welding clamp with a lower arm featuring a guide stop that includes a projection perpendicular to the upper arm, allowing precise positioning and contact with sheet metal, and a guide body that can slide and rotate on the lower arm, ensuring consistent electrode placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of spot welding clamp is used, then ease of operation is improved, but manufacturing precision deteriorates due to natural shifts in positioning
Solution Approach 1:
The guide body acts as an intermediary element between the lower arm and the sheet metal. It mediates the positioning process by providing a standardized interface that eliminates manual positioning errors while preserving the operator's ability to manually manipulate the clamp.
Solution Approach 2:
The guide body is pre-mounted on the lower arm before operation. This preliminary action establishes the correct positioning geometry in advance, so that when the operator manually positions the clamp, the welding electrodes are automatically aligned with the correct spots on the sheet metal.
2Manufacturing precision
If robot operation of spot welding clamp is used, then manufacturing precision is improved, but device complexity deteriorates
Solution Approach 1:
The guide body serves as a simple mechanical intermediary that provides precision positioning without requiring complex robotic systems. It translates simple manual or robotic motion into precise electrode positioning through its geometric design.
Solution Approach 2:
The guide body's geometric parameters (dimensions, orientation, position on the lower arm) are designed to transform the motion parameters of the clamp into the required positioning parameters for the welding electrodes, achieving precision through parameter transformation rather than complex control systems.
3Manufacturing precision
If fixed electrode positioning is used, then manufacturing precision is improved, but adaptability deteriorates for varying geometries
Solution Approach 1:
The guide body is designed to be dynamically repositionable on the lower arm. It can be mounted at different positions and orientations depending on the specific geometry of the sheet metal being welded, allowing the system to adapt to varying geometries while maintaining precision through the guide body's standardized interface.
Solution Approach 2:
The positioning system is segmented into the lower arm and the separately mountable guide body. This segmentation allows the guide body to be repositioned or replaced to accommodate different welding geometries, while the lower arm provides the stable base structure.
Data Source
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AI summary
The spot welding tongs comprise a lower arm (15) having a first electrode (14), and an upper arm (10) having a second electrode (11) for making a spot weld between a first sheet metal part (13) and a second sheet metal part (12) by bringing the first electrode (14) into contact with the first sheet metal part (13) and the second electrode (11) into contact with the second sheet metal part (12). The lower arm (15) comprises a guide for stopping against the first sheet metal part (13).