Sheet Metal Tool Wetting to Prevent Cold Welds and Flakes
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Solution Overview
Problem
During the processing of sheet metal parts, particularly aluminum, cold welds and flakes form due to direct contact between tools and metal, leading to increased tool wear and surface issues, requiring rework and causing downtime in automotive manufacturing.
Innovation Solution
A method and device where the sheet metal working tool's contact region is wetted with a non-water-miscible, low-viscosity oil containing synthetic solids and phosphoric EP additives, forming a separation layer to prevent cold welds and flakes, and a fluid allocation system ensures continuous wetting during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct contact between tool and sheet metal is used for cutting or bending, then processing function is achieved, but cold welds and flakes form causing surface issues and tool wear
Solution Approach 1:
A fluid allocation device introduces a lubricant fluid as an intermediary substance between the sheet metal working tool and the sheet metal part. The fluid forms a separation layer that prevents direct contact, thereby eliminating cold welds and flake formation while maintaining the processing function. The fluid is applied to the sheet metal contact region before and during the impacting movement of the tool.
2Duration of action of moving object
If conventional dry processing is used, then device complexity is low, but tool wear increases and production downtime occurs
Solution Approach 1:
The fluid allocation device is designed to automatically supply lubricant fluid to the sheet metal contact region based on the tool's movement. The system includes a fluid reservoir, pump, and distribution mechanism that activates during the tool's impacting movement, providing continuous wetting without requiring manual intervention. This self-service approach minimizes the operational burden while extending tool life.
3Manufacturing precision
If fluid is applied to prevent cold welds, then surface quality improves, but processing time may increase due to fluid application and cleanup
Solution Approach 1:
The fluid allocation device ensures continuous application of lubricant fluid throughout the tool's impacting movement and during the return stroke. The pump system maintains constant fluid supply to the contact region, eliminating the need for separate application and cleanup steps. This continuous action maintains surface quality while minimizing interruptions to the processing cycle.
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
The solution significantly reduces tool wear, rework, and production losses by minimizing the formation of cold welds and flakes, extending tool lifespan and maintaining surface quality.
Implementation Method 1
The sheet metal contact region is wetted with a non-water-miscible, low-viscosity oil containing synthetic solids and phosphoric EP additives, forming a separation layer to prevent cold welds and flakes
Implementation Method 2
cold welds in metalworking are created by interactions on the atomic level during direct contact between friction partners
Data Source
AI summary
A method for processing a sheet metal part using a sheet metal working tool of a sheet metal working device, wherein the sheet metal working tool is a cutting blade or a press-brake jaw, wherein a sheet metal part to be processed is fixed on a cutting attachment or on a press-brake attachment by a blank holder, and the sheet metal working tool for processing the sheet metal part, proceeding from an initial position (A), carries out a lowering movement in the direction of the fixed sheet metal part. The sheet metal working tool in the process is lowered in such a way that a sheet metal contact region of the sheet metal working tool impacts the sheet metal part, and the sheet metal part is cut to size or bent by means of the sheet metal working tool.