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Frequency Inspection of Brake System Components

Signalysis Inc.-Robert Cagle
  • Technical Paper
  • 2019-01-2117
To be published on 2019-09-15 by SAE International in United States
Frequency inspection has long been a tool utilized by manufacturers of brake system components as a means of quality control. This is important to combat perceived defectiveness of a system that experiences issues, such as brake squeal, as well as to identify actual defects in the parts going out to customers. Every component has its own resonance frequencies based on the dynamics of that component. Knowledge of the resonance frequencies of each component provides insight that can prevent manufacturers from sending out defective units, whether they be perceived defects or actual defects. NVH engineers who understand these phenomena perform theoretical analysis and acquire experimental data in the lab to gain insight into their parts that will eventually be produced on the assembly line. Unfortunately, the frequency requirements, and the consequences thereof, defined by the NVH engineers can still remain somewhat of a mystery to the manufacturing engineers who are tasked with applying them. Oversights in specifications can lead to avoidable scares that lead to delays and downtime. For example, differences in accelerometer placement on a…
 
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Assessing Viscosity in Hydro-Erosive Grinding Process via Refractometry

SAE International Journal of Fuels and Lubricants

UTFPR, Brazil-Bárbara R. Heidemann, Gustavo Scherpinski, Luís Fabris, Marcia Muller, José L. Fabris, Giuseppe Pintaude
  • Journal Article
  • 04-12-03-0012
Published 2019-08-22 by SAE International in United States
The manufacturing of diesel injector nozzles requires precision processing to produce multiple micro-holes. An abrasive fluid containing a mixture of mineral oil and hard particles is used for rounding them, ensuring the hydrodynamics of the injection. As verified in a previous investigation, the viscosity of the fluid undergoes uncontrolled changes during hydro-erosive (HE) grinding. Such undesired viscosity changes are detrimental to the process and difficult to assess. The current investigation aims to study the possibility of using the refractive index of the oils used in the HE grinding for assessing their viscosities. A calibration curve correlating the refractive index and viscosity was obtained from the analysis of samples produced by mixing two distinct mineral oils in different proportions. The determined calibration curve was tested with 45 samples of filtered oil, collected directly from the tanks during the HE grinding. The results showed that refractometry is a potential technique for online control of grinding efficiency.
 
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Requirements for Plastic Encapsulated Microcircuits Discrete Semiconductors in Space Applications

CE-12 Solid State Devices
  • Aerospace Standard
  • AS6294/3
  • Current
Published 2019-08-07 by SAE International in United States

This document establishes the requirements for screening, qualification, and lot acceptance testing of Plastic Encapsulated Discrete Semiconductors (PEDS) for use in space application environments. The scope of this document is intended for standard silicon based technology only, but the process and methodology described within can be adopted for other technologies such as Silicon Carbide, Gallium Nitride, and Gallium Arsenide. However, when non-silicon based technology parts are being used, the device characterization shall be modified, and it is recommended to use available industry standards based upon published research/testing reports for those technology to address applicable physics of failure.

 
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Introduction to Advanced Manufacturing

Ramy Harik, Thorsten Wuest
  • Book
  • R-463
Published 2019-07-24 by SAE International in United States

Introduction to Advanced Manufacturing was written by two experienced and passionate engineers whose mission is to make the subject of advanced manufacturing easy to understand and a practical solution to everyday problems. Harik, Ph.D. and Wuest, Ph.D., professors who have taught the subject for decades, combined their expertise to develop both an applied manual and a theoretical reference that addresses many different needs.

Introduction to Advanced Manufacturing covers the following topics in detail:

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High-Throughput Friction and Wear Tester

  • Magazine Article
  • TBMG-34739
Published 2019-07-01 by Tech Briefs Media Group in United States

There is a need for high-volume material testing/qualification but industry and researchers are currently limited by commercially available testing devices. Most wear testers can only handle one sample at a time and are often expensive.

 

Training and Approval of Heat-Treating Personnel

AMS B Finishes Processes and Fluids Committee
  • Aerospace Standard
  • ARP1962B
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) describes training and approval of personnel performing certain heat-treating and associated operations that could have a material impact on the properties of materials being heat treated. It also recommends that only approved personnel perform or monitor the functions listed in Table 1.
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Aerospace Series - Quality Management Systems - Nonconformity Data Definition and Documentation

G-14 Americas Aerospace Quality Standards Committee (AAQSC)
  • Aerospace Standard
  • AS9131D
  • Current
Published 2019-05-31 by SAE International in United States
This standard defines the common nonconformity data definition and documentation that shall be exchanged between an internal/external supplier or sub-tier supplier, and the customer when informing about a nonconformity requiring formal decision. The requirements are applicable, partly or totally, when reporting a product nonconformity to the owner or operator, as user of the end item (e.g., engine, aircraft, spacecraft, helicopter), if specified by contract. Reporting of nonconformity data, either electronically or conventionally on paper, is subject to the terms and conditions of the contract. This also includes, where applicable, data access under export control regulations.
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CORRIGENDUM: Rapid Methodology to Simultaneous Quantification of Differ Antioxidants in Biodiesel Using Infrared Spectrometry and Multivariate Calibration

SAE International Journal of Fuels and Lubricants

National Institute of Metrology, Quality and Technology (INMETRO), Brazil-Luciano Nascimento Batista, Viviane F. Mello, Mauricio G. Fonseca, Wericksonb F.C. Rocha
National Institute of Technology, Brazil-Claudete N. Kunigami
  • Journal Article
  • 04-12-01-0004.1
Published 2019-05-15 by SAE International in United States
No Abstract Available.
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Integrating a Proactive Quality Control Concept into Machining Operation of a Crankshaft Manufacturing Process

FCA US LLC-Loda Bazzi
Published 2019-04-02 by SAE International in United States
Competition in the manufacturing industry is ever increasingly intense. Manufacturing organizations that want to grow and prosper must embrace a discipline of constant improvement. Their engineering departments are tasked with improving existing manufacturing processes in terms of quality and throughput, which is vital to competing on a global scale. Manufacturers strive to utilize technologies to extract efficiencies from their existing processes. Reducing scrap and rework is the paramount goal in increasing a processes’ efficiency. The foundation of this study is to analyze a production line to determine the quality status throughout the manufacturing process. The intention is to react to process instability before the production becomes non-compliant (scrap/rework) which will significantly improve productivity.By incorporating the proposed technology into the production process, the desired achievement will be to spot process variables at the earliest stages so that counter measures can be taken to stabilize the process before production drifts into non-compliance. Furthermore, the technology will communicate with machining operations to initiate counter measures such as program offsets, tool changes and wheel dressings. The main goal of…
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Effects of Nitrided and Chrome Plated Die Surface Roughness on Friction in Bending Under Tension

United States Steel Corporation-Hua-Chu Shih
Published 2019-04-02 by SAE International in United States
Different die surface polish conditions result in a noticeable effect on material flow in stamping, which can lead to splitting, wrinkling, or other surface stretching issues associated with different friction conditions. These occurrences are not only limited to the non-coated dies, but also nitrided and chrome plated dies. To ensure quality control of the stamped parts, the die conditions corresponding to different polishing procedures need to be developed based on measurable parameters such as surface roughness (Ra). The intent of this study is to investigate the effects of nitrided and chrome plated die surface roughness on friction. The Bending-Under-Tension (BUT) test was conducted to simulate the stamping process due to the test’s versatility and flexibility in changing test parameters. The test involves moving sheet metal across a 3/8-inch diameter pin, which substitutes for a die surface. The pin can be modified by material, heat treatment, coating, and surface roughness. Pins were made of D6510 steel and heat treated to 54-58 HRC. Two different die polishing procedures were developed. The first is the progressive polishing procedure,…
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