Roller Head Clamping Structure for Leak-Safe Seam Welding Arms
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Solution Overview
Problem
Existing roller heads for resistance seam welding machines experience frequent wear, leading to assembly errors, leaks, and contact problems due to misalignment of fastening extensions, resulting in costly machine downtimes.
Innovation Solution
A method for fastening a roller head to a welding arm using a reception opening with parallel limiting walls and fastening reception openings, where the fastening extensions are pressed onto even contact surfaces within the boundaries, allowing for reliable sealing and current transmission, and optionally using adapter arrangements or clamping pieces for precise alignment and force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If roller heads are frequently replaced due to wear, then service life is extended, but assembly errors and misalignment occur leading to leaks and contact problems
Solution Approach 1:
The fastening extension is segmented into a first portion on the roller head and a second portion on the welding arm, allowing independent replacement of the roller head while maintaining alignment through the continuing second portion of the fastening extension in the welding arm
Solution Approach 2:
The second portion of the fastening extension is pre-formed in the welding arm during manufacturing, establishing predetermined alignment features that guide the first portion of the fastening extension on the roller head during assembly, preventing misalignment before it can cause problems
2Ease of operation
If traditional fastening extensions are used, then roller head assembly is simple, but alignment errors occur during assembly leading to leaks and contact problems
Solution Approach 1:
The fastening extension acts as an intermediary element between the roller head and welding arm, with its continuing structure serving as a physical guide that automatically aligns the supply and discharge holes during assembly, eliminating the need for complex alignment procedures
Solution Approach 2:
The second portion of the fastening extension is pre-formed in the welding arm with precise geometry that predetermined the alignment of supply and discharge holes, so that when the roller head is assembled, the holes automatically align without requiring manual adjustment or complex tooling
Data Source
AI summary
An arrangement including a welding arm (2) for a resistance seam welding machine and a roller head (1) fastened thereon, which has a stator (3) and an electrode roller (4) which is supported as a rotor on the stator (3) in a rotatable way, wherein the stator (3) protrudes over the electrode roller (4) with fastening extensions (5) on both sides of the electrode roller (4). The welding arm (2) has a reception opening (6) for the roller head (1), which is formed between two limiting walls (7) facing each other, which themselves have fastening reception openings (8) for the fastening extensions (5). The roller head (1) is arranged inside the reception opening (6) in such a way that the electrode roller (4) protrudes outside the reception opening (6) with a part of its circumferential boundary and the fastening extensions (5) are arranged inside the fastening reception openings (8). The roller head (1) is fastened to the welding arm (2) by pressing each of the fastening extensions (5) of the stator (3) with an even contact surface (9) formed thereon to a attributed even contact surface (10, 19) inside the boundaries of the respective fastening reception opening (8), wherein each of the fastening extensions (5) of the stator (3) is pressed with a clamping piece (11) received in the respective fastening reception opening (8) with its contact surfaces (9) against the attributed contact surfaces (10, 19). It has been discovered that mounting errors may be avoided by the arrangement according to the invention and that a good and reliable sealing and current transmission can be reached.