Tube Bending Mandrel Assembly With Through-Hole Lubrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mandrel assemblies in tube bending machines fail to adequately distribute lubricant, leading to overheating, malfunction, and potential tube rupture due to insufficient lubrication, necessitating manual pre-lubrication in demanding applications.
Innovation Solution
A mandrel assembly with articulation elements featuring through-holes and a deflector element at the extreme distal articulation point to enhance lubricant distribution, ensuring adequate lubrication throughout the bending process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricant is pumped through the mandrel rod and distributed via outlet ports on the mandrel body, then the lubrication system is simple, but the lubricant distribution inside the tube is insufficient
Solution Approach 1:
The articulation elements are divided into multiple segments with through-holes, creating multiple lubricant distribution pathways along the length of the mandrel assembly. This segmentation allows lubricant to be delivered to multiple locations simultaneously, improving overall lubrication coverage without requiring a complex multi-port system
Solution Approach 2:
The articulation elements act as intermediary components that receive lubricant from the mandrel body outlet ports and redistribute it through their own through-holes. This intermediary mechanism amplifies the lubricant distribution capability, allowing a simple port system to achieve comprehensive lubrication through the articulation elements
2Reliability
If manual pre-lubrication is performed by the operator, then lubrication can be improved in demanding applications, but the process becomes more time-consuming and labor-intensive
Solution Approach 1:
The mandrel assembly is designed to automatically distribute lubricant through its own structure during the normal bending operation. The articulation elements with through-holes enable the system to self-lubricate without requiring external manual intervention, converting a manual pre-lubrication step into an automated self-service function
Solution Approach 2:
The lubricant distribution system is pre-configured within the mandrel assembly structure, with channels and through-holes positioned to deliver lubricant to critical areas before the bending process begins. This preliminary arrangement of lubrication pathways ensures immediate lubrication availability without requiring separate preparation steps
3Temperature
If the lubricant film formation is insufficient, then the mandrel assembly structure can be simpler, but overheating and tube rupture may occur
Solution Approach 1:
The articulation elements are designed with through-holes at specific locations where lubricant is most needed for heat dissipation and friction reduction. This localized quality enhancement at critical articulation points ensures adequate lubrication film formation where temperature and stress are highest, preventing overheating and failure
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
Improves lubricant distribution, enhances process reliability, repeatability, safety, and reduces waste by eliminating manual pre-lubrication, while preventing component failure and tube rupture.
Implementation Method 1
The supply system pumps the lubricant through the mandrel rod
Implementation Method 2
the deflector element being configured to radially deflect outwardly the lubricant exiting the through-holes
Implementation Method 3
the use of mandrel assemblies is well known, as they serve the purpose of supporting the tube profile from the inside during the deformation process
Data Source
AI summary
A mandrel assembly for a tube bending machine has a mandrel body, a mandrel rod, a series of articulation elements connected to one another and to the mandrel body through respective cylindrical or spherical hinges, and a network of lubricant transport channels formed through the mandrel body and communicating with a lubricant feed passage formed along the mandrel rod. The network of lubricant transport channels has a plurality of lubricant outlet ports arranged on the distal end or on a peripheral surface of the mandrel body. A plurality of through-holes extending along a longitudinal direction of the respective articulation element is formed through each of the articulation elements. The through-holes are configured to convey a lubricant to a front side of an extreme distal articulation element of the series of articulation elements. The extreme distal articulation element has a deflector element.