Browse Topic: Finishing
Multiple experimental studies were performed on galling intiation for variety of tooling materials, coatings and surface treatments, sheet materials with various surface textures and lubrication. Majority of studies were performed for small number of samples in laboratory conditions. In this paper, the methodology of screening experiment using different combinations of tooling configurations and sheet material in the lab followed by the high volume small scale U-bend performed in the progressive die on the mechanical press is discussed. The experimental study was performed to understand the effect of the interface between the sheet metal and the die surface on sheet metal flow during stamping operations. Aluminum sheet AA5754 2.5mm thick was used in this experimentation. The sheet was tested in laboratory conditions by pulling between two flat insert with controllable clamping force and through the drawbead system with variable radii of the female bead. Comparing pulling forces during
At nearly every trade show where Beckhoff Automation presents the XPlanar system, attendees stop in their tracks to watch. They comment on how exciting and interesting the magnetically levitating and flying movers are. And then they ask, “What can you actually do with it?”
In the 1st generation Toyota "MIRAI" fuel cell stack, carbon protective surface coating is deposited after individual Ti bipolar plate being press-formed into the desired shape. Such a process has relatively low production speed, not ideal for large scale manufacturing. A new coating concept, consisting of a nanostructured composite layer of titanium oxide and carbon particles, was devised to enable the incorporation of both the surface treatment and the press processes into the roll-to-roll production line. The initial coating showed higher than expected contact resistance, of which the root cause was identified as nitrogen contamination during the annealing step that inhibited the formation of the composite film structure. Upon the implementation of a vacuum furnace chamber as the countermeasure, the issue was resolved, and the improved coating could meet all the requirements of productivity, conductivity, and durability for use in the newer generation of fuel cell stacks.
The performance of low-adhesion surfaces in a realistic, in-flight icing environment with supercooled liquid droplets is evaluated using a NACA 0018 airfoil in the National Research Council of Canada Altitude Icing Wind Tunnel. This project was completed in collaboration with McGill University, the University of Toronto and the NRC Aerospace Manufacturing Technologies Centre in March 2022. Each collaborator used significantly different methods to produce low-adhesion surface treatments. The goal of the research program was to demonstrate if the low-adhesion surfaces reduced the energy required to de-ice or anti-ice an airfoil in an in-flight icing environment. Each collaborator had been developing their own low-adhesion surfaces, using bench tests in cold rooms and a spin rig in the wind tunnel to evaluate their performance. The most promising surface treatments were selected for testing on the airfoil. The de-icing and anti-icing performance of the low-adhesion surfaces was compared
This specification provides requirements and procedures for gas-pressure leak testing of parts.
This specification covers requirements for producing brazed joints in parts fabricated from corrosion- and heat-resistant steels, carbon or low-alloy steels, or copper alloys, and the properties of such joints.
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
This specification covers a corrosion-resistant steel in the form of welded and drawn or seamless and drawn tubing.
This specification defines limits of variation for determining acceptability of the composition of wrought low-alloy and carbon steel parts and material acquired from a producer.
This standard provides the following: a Definition of terms pertaining to marking. b Symbols for marking location. c Requirements and restrictions for permanent markings. d Types of marking methods. e Rules for designating marking methods. f Table listing marking methods.
This SAE Aerospace Information Report (AIR) is intended to document and provide access to information obtained by an industry survey. It summarizes and documents data regarding possible alternatives to the use of cadmium plating on general connectors and connector accessories typically used in aerospace and military defense electrical interconnect systems.
This SAE Aerospace Information Report (AIR) is limited to the subject of aircraft fuel systems and the questions concerning the requirements for electrical bonding of the various components of the system as related to Static Electric Charges, Fault Current, Electromagnetic Interference (EMI) and Lightning Strikes (Direct and Indirect Effects). This AIR contains engineering guidelines for the design, installation, testing (measurement) and inspection of electrical bonds.
This specification covers the requirements for producing brazed joints on aluminum and aluminum alloys by torch or furnace brazing.
The purpose of this specification is to establish requirements of a grinding method and to provide grinding parameters that will eliminate or minimize overheating, cracking, high residual tensile stresses, and/or other metallurgical changes that decrease structural integrity of steel parts or chrome plated steel parts (see 8.3). This standard establishes requirements for low stress grinding of martensitic high strength steel heat-treated to 180 ksi (1241 MPa) minimum ultimate tensile strength (UTS) and above, and requirements for low stress grinding of chromium plating applied to such high strength steel.
This specification covers a corrosion- and heat-resistant steel in the form of two types of thin-wall, close-tolerance hydraulic tubing 0.125 to 2.00 inches (3.18 to 50.8 mm), inclusive, in nominal OD.
This specification covers the requirements for producing brazed joints of aluminum and aluminum alloys by immersion in a molten flux bath.
This specification establishes the requirements for a hard anodic coating on aluminum and aluminum alloys.
This specification covers the material and process requirements for fabricating sandwich radomes having polyimide-resin-impregnated quartz cloth shells and polyimide-resin syntactic foam cores.
This SAE Aerospace Recommended Practice (ARP) provides recommendations for additive manufacturing (AM) designed/repaired aircraft components.
This specification covers the engineering requirements for preparing surfaces of both virgin and filled polytetrafluoroethylene (PTFE) materials for bonding and the properties resulting from the treatment.
This specification establishes the requirements for a hard aluminum oxide coating, impregnated or codeposited with polytetrafluoroethylene (PTFE) on aluminum alloys.
This specification covers a corrosion- and heat-resistant nickel alloy in the form of two types of tubing.
This specification covers a corrosion- and heat-resistant nickel alloy in the form of welded and drawn tubing.
This recommended practice establishes the procedures and requirements for cleaning titanium alloy parts prior to adhesive bonding operations.
This specification covers a corrosion and heat-resistant steel in the form of thin-wall seamless tubing.
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.
This document covers the performance requirements for solid dry film lubricants, air dried or heat cured, for use in aerospace applications. These lubricants are intended to prevent galling, and may be capable of remaining effective for extended periods of time after exposure to extreme environmental conditions.
For cold gas Inflator, high refinement of ultimate pressure load forecast of inflator housing is one key of Inflator development. For inflator housing hydro-burst test ultimate load calculation, nonlinear finite element software for high precision results. At beginning, the material parameters of inflator housing for simulation is correlated. The FEA material model adopts the stress-strain data from uniaxial tensile experiments. Considering the geometrical nonlinearity resulting from large deformation as well as material nonlinearity from plastic hardening, the whole tensile process from tensile deformation to failure of the specimen is simulated. Numerical results show that the simulation is appropriate to predict the entire deformation process, and simulation results of ultimate tensile load, X-shape distribution of concentrated instability zone, the fracture location and inclined angle all agrees with that of test results. After finishing the correlation of uniaxial tensile test and
This specification covers the engineering requirements for applying aluminum oxide to metal parts by detonation deposition and the properties of such coatings.
The static coefficient of friction between lining and shoe plays a fundamental role in the lining fixing project, which is the most important parameter for the riveted joint calculation. For the lining riveting, the rivet needs to ensure that friction material and shoe remain in contact through the normal force applied on the surfaces, but the rivet should not be exposed to shear forces. Thus, the brake torque transmission must occur through the static coefficient of friction between lining and shoe, not allowing relative slips or movements between the pair in contact. Therefore, the present study aims to understand the influence of the static friction coefficient between lining and shoe as a function of the lining internal superficial roughness, from the evaluation of different roughness conditions - contact area with shoe -. The static coefficient of friction between lining and shoe is a complex measurement to be performed, due to the cylindrical geometry of the drum brake system, so
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