Fastening Flange Recesses for Electrical Machine Alignment
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Solution Overview
Problem
The integral raised portions on existing fastening flanges for electrical machines cause deformation and incorrect positioning of projections due to their formation, leading to rigidity issues and improper alignment.
Innovation Solution
The introduction of recesses in the rim of the fastening flange reduces its rigidity, preventing warping during the formation of raised portions, and allows for adjustable rigidity by varying the width of the sheet-metal strip and recess position, enabling precise mechanical configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If raised portions are integrally formed from the fastening flange, then the fastening flange achieves structural integrity and strength, but the rim deforms and projections are incorrectly positioned
Solution Approach 1:
The rim is segmented by introducing recesses that divide it into multiple sections (side sections between recesses and residual rim sections at the ends). This segmentation allows differential deformation behavior - the recessed areas can deform to accommodate raised portion formation while the residual rim sections maintain structural integrity and projection positioning
Solution Approach 2:
Different regions of the rim are given different properties through the recesses. The recessed areas have reduced rigidity to allow deformation during raised portion formation, while the residual rim sections maintain sufficient rigidity to preserve projection positioning accuracy. This local differentiation resolves the contradiction between overall structural strength and local positioning precision
2Manufacturing precision
If the rim is made rigid to maintain projection positioning, then positioning accuracy improves, but the raised portions cause warping and deformation
Solution Approach 1:
The rim is divided into recessed sections and residual rim sections. The recessed sections act as compliance zones that can deform without causing overall warping, while the residual rim sections maintain the necessary rigidity for accurate projection positioning
Solution Approach 2:
The recesses act as intermediary elements that mediate between the conflicting requirements. They provide a deformation pathway that absorbs the warping tendency while allowing the residual rim sections to maintain their shape and positioning accuracy
Data Source
AI summary
An electrical machine (12) comprising a fastening flange (10), wherein the fastening flange (10) has a rim (46), so that the fastening flange (10) is arranged on a housing part (14) of the electrical machine (12) in such a way that the fastening flange (10) surrounds the housing part (14) at least in sections in the circumferential direction (16) of the housing part (14) at least by way of the rim (46), wherein the fastening flange (10) has at least one radially directed raised portion (18) which is integrally formed from the fastening flange (10) and bears against the housing part (14), wherein at least one recess (47) is formed within the rim (46), wherein the recess (47) influences the rigidity of the fastening flange (10).