Integrally Formed Installation Mandrel for Wire Thread Inserts
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Solution Overview
Problem
Existing installation mandrels for wire thread inserts with bendable mounting pins are complex and require additional components for installation and removal, leading to potential disruptions and noise during assembly due to loose parts.
Innovation Solution
An integrally formed installation mandrel with a cylindrical helix and a single axial extension that forms a non-rotatable connection with the wire thread insert, allowing for screwing and bending of the pin into the threaded hole without additional components, ensuring stability and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional components are used for installation and removal of wire thread inserts, then the installation process can be completed, but the device complexity increases and loose parts cause noise and disruptions during assembly
Solution Approach 1:
The patent combines the installation mandrel and the drive pin into a single integrally formed component. The drive pin is directly connected to the mandrel without requiring separate fastening elements, eliminating loose parts that cause noise and disruptions while simplifying the overall device structure.
Solution Approach 2:
The integrally formed mandrel with drive pin serves multiple functions: it acts as both the installation tool and the driving mechanism for screwing the wire thread insert into the threaded bore. This multi-functional design eliminates the need for separate installation components.
2Ease of operation
If additional components are used for installation and removal of wire thread inserts, then the installation process can be completed, but the service life of the installation tool is reduced
Solution Approach 1:
By integrating the drive pin with the mandrel, the patent creates a more robust structure that eliminates weak points at connection interfaces. The integral construction reduces stress concentration and potential failure points, thereby extending the service life of the installation tool.
Data Source
Figure 1~2b
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AI summary
The present invention discloses an integrally formed installation spindle adapted to a wire thread insert, which has a cylindrical helix with a plurality of helically wound turns of a wire, in which a first turn comprises a preferably arc-shaped drive pin without a drive notch projecting over a bending area into an interior of the helix, with which the wire thread insert can be screwed into a threaded bore of a component in an insertion direction, wherein the installation spindle has the following features: a drive and holding end for rotating and holding the installation spindle in an installation tool and a functional end for installing the wire thread insert in a threaded bore of a component;From an axial end face of the installation spindle at the functional end, an axial extension projects in the direction of a longitudinal axis of the installation spindle, which is bounded along a circumferential extent of the installation spindle by an arcuate radial outer surface at a rotation angle α from a range of 30° ≤ α ≤ 180°; with respect to the direction of rotation, the axial extension has a ramp starting at a front end of the arcuate radial outer surface, which extends upwards in the axial direction of the installation spindle as a strip surface on the axial extension; and with respect to the direction of rotation, the axial extension slopes down axially at a rear end of the arcuate radial outer surface in an axially curved back surface, which is arranged radially similarly.