Laser Welded Housing Parts for Vibrating Armature Pumps
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Solution Overview
Problem
Existing oscillating armature pumps for household appliances face inefficiencies in assembly processes and reliability due to lack of precise and reliable connection methods between housing parts, particularly in high-pressure applications.
Innovation Solution
The use of a laser weld seam between housing parts made of weldable plastics, such as Grivory HT1 V-FWA, to create a precise, reliable, and fluid-tight connection, allowing for efficient assembly and high-strength welds that can withstand pressures up to 20 bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional connection methods are used between housing parts, then assembly process is simpler, but connection strength and tightness are insufficient for high-pressure applications
Solution Approach 1:
The patent replaces traditional mechanical connection methods (screws, clips, adhesives) with laser beam welding to join housing parts. This substitution provides significantly higher connection strength and tightness suitable for high-pressure applications (up to 20 bar), while the automated laser welding process actually reduces overall manufacturing complexity compared to multi-step mechanical assembly.
Solution Approach 2:
The patent changes the connection parameter from mechanical interlocking to thermal fusion welding. By using laser beam welding parameters (energy density, pulse duration, focal point), the housing parts are fused into a monolithic structure that withstands high pressures, transforming the connection strength parameter from moderate to exceptional levels.
2Manufacturing precision
If laser weld seam is used to join housing parts, then connection precision and reliability are improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces manual or mechanical positioning methods with automated laser welding systems that provide precise positioning through program-controlled beam movement. This achieves exceptional positioning precision for the weld seams while the automation reduces the need for complex manual alignment procedures, actually simplifying the overall manufacturing process.
3Productivity
If housing parts are made of materials transparent to welding laser beam, then laser welding efficiency is improved, but material selection is limited
Solution Approach 1:
The patent changes the material parameter by selecting specific thermoplastics (polyamide, polypropylene, polyethylene) that exhibit transparency to infrared laser beams. This parameter change enables rapid laser welding assembly (improving productivity) while maintaining the versatility of using common engineering plastics that can be molded into complex housing shapes and withstand high pressures.
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 solution enables a durable, efficient assembly process with a high-strength and tight weld seam, ensuring a reliable sealed connection and long service life for the oscillating armature pump, particularly suitable for high-pressure applications like coffee machines.
Implementation Method 1
at least one weld seam joining the housing parts, wherein this at least one weld seam is a laser weld seam
Implementation Method 2
this at least one weld seam is a laser weld seam... High weld strength and tightness can be achieved
Implementation Method 3
at least two housing parts form an interference fit... at least one of the at least two interconnected housing parts is at least partially made of a material transparent to a welding laser beam
Data Source
Figure 1
AI summary
The invention relates to a vibrating armature pump for a household appliance, having at least two rigidly interconnected housing parts (11, 12, 13, 14, 15). According to the invention, the vibrating armature pump has at least one weld seam (16, 17, 18) which interconnects the housing parts (11, 12, 13, 14, 15), the at least one weld seam (16, 17, 18) being a laser weld seam, and the at least two housing parts (11, 12, 13, 14, 15) forming a press fit in which the housing parts (11, 12, 13, 14, 15) are secured by way of the at least one weld seam (16, 17, 18).