Plastic Profile Frame Welding Using Measured Bar Length Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of precisely fitting plastic profile bars with end overlaps and notches for creating frames that mimic wooden frames is complicated by the need for exact dimensional accuracy, leading to material waste and potential gaps or stresses due to imprecise cutting.
Innovation Solution
A method using a four-head welding machine adjusts to the actual dimensions of plastic profile bars with overlaps and notches, ensuring precise welding without requiring prior cuts to target dimensions, by determining and adjusting welding heads based on actual bar dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If plastic profile bars are cut with tight tolerances to achieve precise fit, then manufacturing precision is improved, but material waste increases and productivity decreases
Solution Approach 1:
The patent performs preliminary measurement of the actual dimensions of plastic profile bars before welding. By determining the real length values of the bars and adjusting the welding heads accordingly, the system eliminates the need for tight pre-cutting tolerances. This preliminary measurement action allows the welding process to compensate for dimensional variations, thereby improving productivity without sacrificing manufacturing precision.
Solution Approach 2:
The patent changes the parameter of welding head position based on the measured actual dimensions of the plastic profile bars. Instead of requiring the bars to meet strict dimensional specifications, the system adjusts the welding parameters (head positions) to match the actual bar dimensions. This parameter adaptation resolves the contradiction by allowing varied input dimensions while maintaining precise welding outcomes.
2Manufacturing precision
If material removal is performed on overlaps and notches to achieve precise fit, then manufacturing precision is improved, but loss of substance increases
Solution Approach 1:
The patent replaces the mechanical material removal process (milling or re-cutting) with a measurement and adjustment system. Instead of physically removing material to achieve fit, the system measures the actual dimensions and adjusts the welding head positions computationally. This substitution eliminates material waste while maintaining precision, directly resolving the contradiction between fit accuracy and material conservation.
3Manufacturing precision
If welding is performed based on target dimensions rather than actual dimensions, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the actual dimensions of the plastic profile bars are measured and used to adjust the welding head positions. The system receives feedback about the real bar lengths and computationally determines the appropriate welding head adjustments. This feedback loop enables precise welding based on actual dimensions rather than theoretical targets, while the automated calculation reduces the perceived complexity by providing clear adjustment instructions.
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 allows for reliable welding with precise fits, eliminating the need for material removal and reducing waste, while avoiding gaps or stresses in the finished frame.
Implementation Method 1
heating the mitered surfaces
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method is proposed for welding four plastic profile bars (PÜ1, PÜ2, PA1, PA2) to form a frame (2) with visible butt joints (4) using a machine (1) with four welding heads (K1, K2, K3, K4), wherein an adjustment (S7) of at least one welding head (K1, K2, K3, K4) is carried out on the basis of at least one previously determined (S4, S5) length value.