Press-Fit Tool Stop Geometry for Accurate Assembly Positioning
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Solution Overview
Problem
Existing press-fitting devices face accuracy issues due to delays in sensor detection, calculation, and motor response, leading to the press-fitting tool advancing past the intended stop position, resulting in inaccurate press-fit products.
Innovation Solution
A press-fitting method using a tool with a pressing portion and a restriction portion, where the positions of these components are set to ensure precise alignment and stopping, adjusting the press-fitting interval dimension based on component dimensions to achieve accurate positioning and stopping during the press-fitting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If sensor detection and motor control are used to control press-fitting distance, then automation and measurement capability are improved, but response delay causes positioning accuracy to deteriorate
Solution Approach 1:
The press-fitting tool is designed with a pre-set interval dimension between the pressing portion and restriction portion that corresponds to the required press-fitting depth. This preliminary configuration eliminates the need for real-time sensor detection and motor control during press-fitting, as the tool structure itself ensures accurate positioning through its predetermined geometry.
2Measurement precision
If sensor detection and calculation processing are used to control stop position, then measurement capability is improved, but processing time delay causes stop position accuracy to deteriorate
Solution Approach 1:
The patent replaces the electronic control system (sensor detection and calculation processing) with a mechanical design solution. The press-fitting tool's structure, with its pre-configured interval dimension, mechanically ensures accurate stop positioning without requiring real-time measurement and calculation during the press-fitting operation.
3Adaptability or versatility
If motor response control is used to adjust press-fitting distance, then adaptability is improved, but response time delay causes press-fitting accuracy to deteriorate
Solution Approach 1:
The patent changes the approach from dynamic parameter adjustment (motor response control) to static parameter configuration (pre-set interval dimension in the tool structure). This structural parameter ensures consistent press-fitting accuracy across different operations without relying on real-time motor response.
Data Source
AI summary
A press-fitting direction position of a pressing surface of a pressing portion of a press-fitting tool and a press-fitting direction position of a restriction surface of a restriction portion of the press-fitting tool are set so that one of a press-fitting component and a press-fitting target component is stopped at a prescribed press-fitting stop position. A press-fitting method includes: adjusting a press-fitting interval dimension in a press-fitting direction between the pressing surface of the pressing portion and the restriction surface of the restriction portion so as to obtain a press-fitting stop position that is set according to component dimensions of the press-fitting component and component dimensions of the press-fitting target component; press-fitting the press-fitting component with the press-fitting target component; and stopping the press-fitting of the press-fitting component with the press-fitting target component by bringing the restriction portion into contact with the press-fitting target component.