Resistance Welding Roller Head Cooling Channels
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Solution Overview
Problem
The service life of roller heads in resistance seam welding machines is limited by the aging of lubricants in roller bearings due to operating temperatures, especially at increased welding speeds and frequencies, and existing cooling methods are inadequate for efficient heat dissipation.
Innovation Solution
The introduction of coolant channels within the bearing outer housing, which are in fluid connection with channels in the stator, enables double-sided cooling of the bearings, reducing bearing temperature and extending the service life of roller heads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If internal cooling of bearings is used, then the bearing temperature is reduced to some extent, but the cooling efficiency is insufficient and lubricant aging continues at high welding speeds
Solution Approach 1:
The cooling system is segmented into two independent parts: internal cooling channels within the bearing inner housing and external cooling channels within the bearing outer housing. This segmentation allows each cooling path to independently contribute to heat dissipation, with the external cooling providing additional capacity that internal cooling alone cannot achieve, thereby extending roller head service life at high welding speeds.
Solution Approach 2:
The cooling approach transitions from a single-dimensional internal cooling system to a two-dimensional cooling system by adding external cooling channels in the bearing outer housing. This dimensional expansion creates additional heat dissipation pathways that complement the internal cooling, effectively reducing bearing temperature and preventing lubricant aging even at increased welding frequencies.
2Productivity
If welding speed and frequency are increased to improve productivity, then manufacturing efficiency increases, but bearing temperature rises and lubricant ages faster
Solution Approach 1:
The external cooling channels are pre-configured in the bearing outer housing to provide immediate heat dissipation capability before temperature-critical failures occur. This preliminary cooling infrastructure is always available and automatically activates when welding operations begin, preventing lubricant degradation before it starts rather than attempting to address it after high-speed welding has already heated the bearings.
3Reliability
If high-quality lubricants are used to extend service life, then bearing performance improves, but the cost increases and cooling efficiency remains limited
Solution Approach 1:
The solution replaces reliance on chemical improvements (high-quality lubricants) with a mechanical/thermal solution (external cooling channels). Instead of depending on advanced lubricant formulations to withstand high temperatures, the system mechanically removes heat through the external cooling system, allowing standard lubricants to perform effectively even at high welding speeds and frequencies.
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
This approach enhances the service life of roller heads by effectively dissipating heat through external cooling, outperforming traditional internal cooling methods and the use of high-quality lubricants, particularly in high-speed welding applications.
Implementation Method 1
These bearings are cooled from the inside of the roller head by the coolant circulating within the roller head which dissipates heat from the bearing via the bearing inner housing
Implementation Method 2
the coolant circulating within the roller head which dissipates heat from the bearing
Implementation Method 3
the arrangement of the coolant channels in the interior of the bearing outer housing comprises a plurality of coolant channels which radiate outwards from the centre of the bearing outer housing
Data Source
AI summary
With a roller head (10) of a resistance seam welding machine, which roller head has a stator (12) and a rotor (14), the bearing outer housing (18, 18′) is cooled by means of channels (2, 2′) provided in its interior. This increases the life of the roller head.