Pre-coated U-shaped Switchboard Enclosure with Concealed Cut Edges
Solution Overview
Problem
The existing manufacturing process for switch cabinet housings involves high production costs due to the need for welding numerous individual parts together and subsequent surface coating, which requires additional operations.
Innovation Solution
The switch cabinet housing is made from pre-coated U-shaped metal sheets with inwardly bent circumferential cut edges, where the bottom and top walls cover the cut edges, eliminating the need for additional coating and allowing for easier assembly and disassembly with latching mechanisms, and incorporating electrical insulation for increased insulation resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If walls are welded together at their edges using known production methods, then the housing structure is assembled, but subsequent coating is required which increases production cost and complexity
Solution Approach 1:
The metal sheet is pre-coated before bending and assembly operations. The coating is applied to the flat sheet metal blank before it is formed into walls and assembled, eliminating the need for subsequent coating operations after welding. This preliminary action resolves the contradiction by performing the coating operation earlier in the process when it is more efficient and eliminates the need for additional production steps.
Solution Approach 2:
Multiple operations are merged into fewer steps: the coating operation is combined with the initial sheet preparation stage, and the bending/forming operations are integrated with the assembly process. By combining these operations and eliminating separate coating steps after assembly, the manufacturing process becomes simpler with fewer distinct production operations.
2Ease of manufacture
If numerous individual parts are welded together, then the housing is assembled, but production cost increases due to additional coating operations
Solution Approach 1:
The metal sheet is pre-coated before assembly operations. By applying the coating to the sheet metal blank before cutting and bending into individual wall parts, the patent eliminates the need for subsequent coating operations on assembled parts. This preliminary action reduces material costs by eliminating the need for additional coating materials and reduces assembly complexity.
Solution Approach 2:
The pre-coated metal sheet serves multiple functions: it provides the structural material for the walls, the protective coating layer, and eliminates the need for separate coating operations. This multi-functionality reduces both the quantity of materials needed (no separate coating materials) and simplifies the manufacturing process.
3Ease of manufacture
If cut edges are left exposed after bending, then the housing structure is formed, but the appearance is compromised and additional coating is required
Solution Approach 1:
The metal sheet is pre-coated before bending operations. By applying the coating to the flat sheet before it is bent into walls, the cut edges created during bending are already coated and protected. This preliminary action ensures that all exposed edges have a finished appearance without requiring additional coating operations.
Solution Approach 2:
The cut edges, which are normally harmful or undesirable due to their raw, exposed appearance, are converted into beneficial features by being pre-coated. The coating process transforms the vulnerable cut edges into protected, aesthetically pleasing surfaces that are integrated with the rest of the coated surface, eliminating the need for separate edge treatment.
Data Source
Figure 1
AI summary
The invention relates to a control cabinet housing (1) with at least one rear wall (2), a bottom wall (4), a top wall (6) and at least two side walls (8, 10) and a method for manufacturing such a housing, wherein • the rear wall (2) and the side walls (8, 10) are formed in one piece from a pre-coated U-shaped bent sheet metal (12) with an inwardly bent circumferential edge (14), • the bottom wall (4) and the top wall (6) are connected to the U-shaped bent sheet metal (12) in such a way that the respective cut edge (14) is concealed.