MSTM Stand with Translation System for Stud Maintenance

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Solution Overview

Problem

Multiple Stud Tensioning Machines (MSTMs) are infrequently used and require efficient maintenance and testing to ensure reliable operation, with existing systems being cumbersome and time-consuming for tasks like stud inspection and cleaning due to the heavy weight of studs.

Innovation Solution

A stand for MSTMs that includes a translation system with synchronized nut-screw systems, a slewing bearing, and a control system, allowing for safe parking and testing of the machine's tensioning and screwing/unscrewing functions, with dedicated baskets for test studs and a command and control system for remote operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the MSTM is used infrequently for maintenance operations, then the machine requires frequent maintenance and inspection, but the heavy weight of studs (hundreds of kilograms) makes manual manipulation time-consuming and requires additional mechanical parts

Engineering Contradiction:
Improveproper functioning of the machineVSAvoidtime for stud manipulation
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The stand enables the MSTM to park itself at a convenient height using the translation system with nut-screw mechanisms, allowing autonomous positioning for maintenance operations without requiring manual handling of heavy studs

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The stand acts as an intermediary device between the floor and the MSTM, providing a platform with baskets that facilitate the transfer and storage of heavy studs, thereby reducing the time and effort required for stud manipulation during maintenance

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If the MSTM is parked on the floor, then it is accessible for maintenance, but it is not safe and does not allow for proper inspection and maintenance operations

Engineering Contradiction:
Improveaccessibility for maintenanceVSAvoidsafety of the machine
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The translation system moves the MSTM vertically from the floor level to an elevated position on the stand, changing the spatial dimension of parking. This elevation provides both safety and accessibility, as the machine is raised to a convenient height while remaining accessible via the movable platform

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Ease of operation

If additional mechanical parts are used for stud manipulation, then the heavy studs can be handled, but the device complexity increases

Engineering Contradiction:
Improvemanipulation of heavy studsVSAvoidadditional mechanical parts
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The stand serves multiple functions: it provides elevated parking for the MSTM, includes movable baskets for stud storage and transfer, and offers a stable platform for maintenance operations. This multi-functionality reduces the need for separate specialized equipment for each task

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Enables safe storage and maintenance of MSTMs, efficient testing of tensioning and screwing/unscrewing functions, and facilitates the transfer of working studs for inspection and cleaning, reducing downtime and operational complexity.

Implementation Method 1

The translation system is installed on a base plate of the first assembly and comprises a plurality of nut-screw systems which are coupled mechanically and in a synchronized manner with one another

Methodology Applied
Scientific EffectScrew mechanism: Screw

Implementation Method 2

a slewing bearing comprising a non-rotatable ring, a rotatable ring, and rolling bodies interposed therebetween, the rings being centered on the central axis

Methodology Applied
Scientific EffectRolling contact: Ball Bearing

Implementation Method 3

Each nut-screw system further comprises a safety load cell for stopping the motion of the second assembly in case of excessive load on the nut-screw system measured by the safety load cell

Methodology Applied
Scientific EffectLoad cell measurement:

Data Source

PatentUS10518370B2Stand for multiple stud tensioning machine
Publication Date: 2019.12.31 AB SKF SKF PATENT DEPARTMENT
  • US10518370B2 patent drawing
  • US10518370B2 patent drawing
  • US10518370B2 patent drawing

AI summary

A stand for hosting a Multiple Stud Tensioning Machine (MSTM) for tensioning working studs, the stand comprising a first assembly designed to lie on a floor, and a second assembly designed to receive the MSTM and movable in translation with respect to the first assembly thanks to a translation system.