Lift Door Panel Mechanical Coupling Eliminates Soldering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for assembling glass panels in lift doors are time-consuming, complex, and costly due to soldering tolerances and thermal deformations, requiring expensive parametric templates and subsequent painting and covering steps.
Innovation Solution
A panel design featuring mechanical coupling elements, such as tongues and slots, in longitudinal and transversal profiles allows for precise positioning and assembly without soldering, using rivets for attachment, which simplifies and accelerates the assembly process while eliminating the need for templates, painting, and covering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If soldering is used to join profiles, then structural strength is improved, but assembly precision deteriorates due to tolerance accumulation and thermal deformation
Solution Approach 1:
The profile structure is segmented into separate components: a base profile and a coupling element. The coupling element is detached from the base profile during manufacturing, allowing independent precision control. During assembly, the coupling element is mechanically attached to perpendicular profiles without thermal processes, eliminating soldering-induced deformation while maintaining structural integrity through distributed mechanical connections.
Solution Approach 2:
A mechanical coupling element acts as an intermediary component between the base profile and perpendicular profiles. This coupling element features a tongue-and-slot mechanism where the tongue of one profile engages with the slot of another, providing precise positioning and rigid connection without thermal processes. The intermediary coupling element distributes mechanical loads and eliminates direct profile-to-profile contact that would require soldering.
2Device complexity
If parametric templates are used for soldering, then assembly complexity is reduced, but production time and cost increase
Solution Approach 1:
The coupling elements are pre-manufactured with integrated tongues and slots at precise angles during the profiling stage. This preliminary action embeds the positioning functionality directly into the profile components themselves, eliminating the need for separate templates during assembly. The profiles are designed with built-in alignment features that guide automatic or manual assembly without additional fixtures.
Solution Approach 2:
The mechanical coupling elements provide self-aligning and self-positioning capabilities through their tongue-and-slot geometry. When profiles are brought together, the tongue automatically guides into the slot, providing inherent alignment and positioning without external templates or complex fixtures. The assembly process becomes self-servicing, where the components themselves ensure precise positioning.
3Strength
If soldering is performed on profiles, then joint strength is improved, but subsequent painting and covering steps are required to mask scorching
Solution Approach 1:
The thermal soldering process is replaced with a purely mechanical connection system. The coupling elements use tongue-and-slot engagement with mechanical fastening (screws, rivets, or press-fit mechanisms) to create rigid joints without heat application. This substitution eliminates thermal scorching on profile surfaces and glass, removing the need for subsequent painting or covering steps to mask damage while maintaining joint strength through mechanical interlocking.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A panel (1) for lift doors is illustrated comprising: a frame (2); at least one portion in glass (3); at least one pair of longitudinal profiles (4), and at least one pair of transversal profiles (5), said longitudinal (4) and transversal profiles (5) being suitable for enclosing the glass portion (3), wherein each of said longitudinal profiles (4) presents at least one mechanical coupling element to a corresponding mechanical coupling element of the transversal profile (5). An assembly method of a panel (1) for lift doors is also illustrated.