An Ultrasound In-Process-Measuring System to Ensure a Minimum Roundness Deviation for Rings During Turning

During the turning process of a ring, the clamping force of the chuck causes circumferential deviations in the ring wall thickness and diameter. This paper focuses on an ultrasonic in-process measuring system which is a prerequisite for in-process compensation of the wall thickness deviation during turning using a fast tool servo. The presented system is coupled to the ring via a cooling lubricant jet and determines the phase difference between the echoes of an ultrasound burst, which are reflected from the outer and the inner ring surface. In order to ensure an accurate operation of the system in a turning centre, the influences of different operating conditions on the signal quality (amplitude height and variation, uncertainty of phase determination) were examined. The wall thickness measurement results of the ultrasonic system were compared with reference data from a coordinate measuring machine. As the observed differences between both methods are sufficiently small, the ultrasonic system is applicable to the in-process compensation of wall thickness deviations in a turning process.

Section: Test Of Operating Conditionsmentioning

confidence: 99%

Section: Principle Of Operationmentioning

confidence: 99%

Section: Principle Of Operationmentioning

confidence: 99%

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In‐process measurements of wall thickness deviations during turning

Stöbener¹,

Goch²

2009

“…Each grinding process has to take the varying depths of cut (derived from the varying distortions) at different positions on the flank of the tooth into account which could lead to varying residual stresses. Therefore, compensational actions before and during the final heat treatment are necessary [16,17].…”

Section: Consequences For Gear Distortionmentioning

confidence: 99%

Identification of process parameters affecting distortion of disks for gear manufacture ‐ Part II: heating, carburizing, quenching

Clausen

Frerichs

Kohlhoff

et al. 2009

In this work the applied approach to ‘Distortion Engineering’ is based on the consideration of the entire manufacturing chain of disks, from casting to the final heat treatment, made from the steel grade 20MnCr5 (SAE 5120). Part II presents the results of the investigations concerning the final heat treatment parameters on the distortion of the disks, whereas part I describes the effect of the influence parameters from casting to cutting. The disk geometry was selected, in order to reduce the expected complexity of influence parameters in gear wheel distortion. The parameter identification took place by means of the design of experiments (DoE). Volume flow rate of quenching gas, hardening temperature and carburizing depth have the expected effect on the volume change of the disks. In addition, occurring differences in the size changes of the inner and the outer surfaces were detected. For the shape changes it was found, that the choice of the loading tool shows the main influence. Furthermore a change in the loading tool does clearly affect the dishing behavior of the disks. Whereas, a relevant influence of the carburizing depth on the shape changes of disks could not be identified in this investigation. As a conclusion from the results presented in part I and II it is assumed that the identified parameters of disk distortion also effect the distortion of gear wheels.

“…Furthermore, an ultrasonic measurement system has been developed for an in-process measurement of wall thickness [3]. In order to austenitize the ring, a symmetrical heating method has been realized, and an asymmetrical heating is under development.…”

Section: Introduction Of the Quality Control Conceptmentioning

confidence: 99%

Cross‐plane quality control concept of the bearing ring production

Zhang¹,

Renken²,

Goch³

2012

This contribution reports on a cross-plane quality control concept for the production of bearing rings. The principal part of this quality control concept is the cross-plane controller, which actually acts as an iterative optimization throughout the production chain and bases upon the models of each sub-process. The cross-plane controller and a model-based sub-control system for the gas quenching process are introduced in this paper.Keywords: Cross-plane / quality / control / roundness deviation / Dieser Beitrag führt in ein prozessübergreifendes Regelungskonzept für die Produktion von Wälz-lagerringen ein. Den Hauptbestandteil dieses Konzept bildet ein prozessübergreifender Regler, der in einem iterativen Optimierungsprozess über die Modelle der Einzelprozesse in der Produktionskette die optimalen Eingangsparameter für den jeweiligen Folgeprozess berechnet. Das übergreifende Regelungskonzept wird anhand eines modellbasierten Regelungssystems für den Gasabschreckungsprozess eingeführt.