Press-fitting Device Segmented Pressing Units Stroke Control
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Solution Overview
Problem
Existing press-fitting devices face challenges in achieving accurate stroke control and versatility, as they often result in insufficient precision due to bending of components under compressive load and require customization for different types of press-fitting objects, limiting their applicability.
Innovation Solution
A press-fitting device with a workpiece holding portion, one-side and other-side pressing units for adjusting the position of press-fitting tools and backup tools, and a controlling portion that manages stroke amounts and displacement to ensure accurate press-fitting, allowing for versatility across various types of press-fitting objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high-rigidity materials are used as constituent members of the press-fitting device, then bending of members is reduced, but device size and weight increase
Solution Approach 1:
The press-fitting device is divided into multiple independent pressing units (first pressing unit with first pressing member, second pressing unit with second pressing member) that can operate independently. Each unit has its own pressing force application point, allowing distributed loading that reduces bending moments on individual members while maintaining overall press-fitting effectiveness.
Solution Approach 2:
The pressing members are designed with universal functionality to handle various press-fitting scenarios. The first and second pressing members can be selectively activated depending on the workpiece type and press-fitting requirements, allowing the device to adapt to different applications without requiring complete redesign, thus avoiding unnecessary weight from over-engineered rigid structures for every possible scenario.
2Manufacturing precision
If pressing members are fixed for specific press-fitting types, then press-fitting accuracy is maintained, but versatility for different press-fitting objects is reduced
Solution Approach 1:
The pressing members are designed to be movable and reconfigurable rather than fixed. The first and second pressing members can be independently positioned and adjusted along the pressing direction, allowing the device to adapt to different press-fitting depths, positions, and configurations while maintaining accurate press-fitting control for each specific application.
Solution Approach 2:
The device allows independent adjustment of pressing forces, stroke lengths, and positioning parameters for the first and second pressing members. By changing these parameters dynamically based on the workpiece type and press-fitting requirements, the device achieves both accurate press-fitting for specific applications and versatility across different press-fitting objects.
3Device complexity
If a single pressing unit is used, then device complexity is reduced, but press-fitting accuracy under large compressive load is insufficient
Solution Approach 1:
The single pressing unit is segmented into two independent pressing units (first pressing unit and second pressing unit), each with its own pressing member. This segmentation allows the compressive load to be distributed across multiple independent action points, reducing the bending moment and deflection on each individual pressing member, thereby improving press-fitting stroke accuracy without requiring a single overly complex rigid structure.
Data Source
AI summary
A press-fitting device includes: a workpiece holding portion; a one-side pressing unit configured to press either one of a press-fitting tool and a backup tool against a workpiece in a first direction while performing three dimensional position adjustment thereon; an other-side pressing unit configured to press the other one of the press-fitting tool and the backup tool which is not pressed by the one-side pressing unit, against the workpiece in a second direction opposite to the first direction, while performing three dimensional position adjustment thereon; and a press-fitting controlling portion configured to control stroke amounts of the tools in a press-fitting direction at the time of a press-fitting operation. The press-fitting controlling portion includes a stroke manipulating portion; a displacement data storing portion; and a stroke correction portion.