1. September 2021

Realtime data collection of bolt connections at full load

A lot of components are exposed to extreme loads. To avoid material fatigue and recognize unwanted conditions early, through perennial experience Schaaf has developed a compact Plug and Play complete solution for real time analysis of bolt connections.
The OBLM (Online Bolt Load Monitoring) detects, via highly precise measuring sensors and complex hardware, smallest changes in bolt length and calculates the resulting tensioning force in the OBLM. This can happen up to 1x time per second upon request and can be observed live via pc, tablet or smartphone. 

Besides data for determining the bolt condition, additional individual values such as wind direction, wind strength, temperature or customer specific data can be collected for analysis. Upon exceeding or subceeding predetermined threshold values, selected users can be notified via alarm to prevent damage. The centerpiece of the OBLM-system is compact and built to fit in the smallest of spaces and can gather data from up to 8 sensors simultaneously.

Alternatively to its LAN connection module, the OBLM can transmit data worldwide via its integrated GSM-module. To ensure interference free data transmission, the OBLM can store data internally during temporary connection-failures.Next to a detailed longtime analysis, the OBLM has the advantage of acting as a monitoring system during assembly, being able to precisely document pretensioning forces which then can be adjusted via design processes. The OBLM, in combination with other Schaaf product groups, is a milestone in the IoT-segment of joining technology.

© 2019 Schaaf Gmbh & Co. KG, Bruesseler Allee 22, 41812 Erkelenz Germany, Tel: +49 24 31 9 77 70 0, Fax: +49 24 31 9 70 77, E-Mail: info@schaaf-gmbh.com All Rights Reserved, Reprint free of charge, Copy requested

Schaaf – The Specialists for Hydraulic High-Pressure Tools
Superior and Flexible
For more than 35 years Schaaf GmbH & Co. KG is involved in the development and manufacturing of hydraulic high-pressure tools and hydraulic high-pressure components. The worldwide active company lives of its innovative solutions and convinces with excellent quality and a continually advanced process of improvement.
Everything at Schaaf is about hydraulic high-pressure technology, hydraulic pretension mechanism, hydraulic nuts and their accessories. Today a variety of high-pressure tools are part of the product range for the whole industry.
The advantages of the hydraulic pretension mechanism tools come to use equally in all fields of application. With the screw tensioning devises and hydraulic nuts, connections can be tightened with the highest degree of accuracy and protocolled with greatest accuracy. During pure axial pretension force creation, no torsion force occurs, the screws are not subjected to force and twisting does not stress the bolts.
Schaaf GmbH & Co KG is
specialized in the development and manufacturing of:
– Bolt Tensioners
– Hydraulic nuts
– TTG Bolts and Nuts
– MDS Mounting Documentation System and TSI Tool Service Indicator / TMS Tool Management System
– ExpaTen bolts
– GripCon
– GripLoc – connection for shafts and axles – ExpaHub
– ExpaTen 2
– Oil press fits
– Hydraulic high-pressure pumps
– Control and automatic control systems
– Hydraulic high-pressure accessory
– MSN Multiple Stud Nuts
© 2018 Schaaf Gmbh & Co. KG, Bruesseler Allee 22, 41812 Erkelenz Germany, Tel: +49 24 31 9 77 70 0, Fax: +49 24 31 9 70 77, E-Mail: info@schaaf-gmbh.com All Rights Reserved, Reprint free of charge, Copy requested.