A machining test to evaluate geometric errors of fiveaxis. Jun 15, 2015 nas 979 test part programmed using siemens 840d vector format and backplotted using cimco edit v7. Plans for either english or metric tools, as well as three and five axis plans. A particle count will show up to have almost the same nas class rating within the different particle ranges. Feed drive ac servo drive with re circulating ball screw for. These bearings have been qualified to stringent sae, military, nas, aecma, and customer design and performance standards in rbc test laboratories.
Nas 979 uniform cutting tests nas series metal cutting equipment specifications. Nas 979 national aerospace standard test part youtube. Feb 15, 2018 production of a nas 979 test piece which is normally done by aluminium but in this case done by stainless steel music by kevin macleod. Anjan dave, principal storage engineer, lsi corporation. Fod prevention assessment criteria i assessment tool developed from nas 412 author. Din 979 20 edition, august 1, 20 hexagon thin slotted and castle nuts metric coarse and fine pitch thread, product grades a and b. The original circlediamondsquare, without the inverted cone, was developed in 1966 as a test part for computer numerically controlled cnc machining centers. Aerospace standard, nas 979 circlediamondsquare with an inverted cone 5. Boeing uses the following documents for definition of a fod program. Nas 412, foreign object damage foreign object debris fod prevention nasastd6016, standard materials and processes requirements for spacecraft iso90009001as9100 quality management standard if applicable add any customer or other regional documents that might apply 4. The standard, iso 107917, describes a machining test to evaluate the machines machining accuracy, but it is only for threeaxis machining.
Technical specification for cnc horizontal milling machine. Require this standard as a guide to be used with an end use type standard such as. Kraus guidelines for prevention and elimination of fod. National aerospace standards aerospace industries association.
Sample mold part being used by the stepnc machine machining partners in the upcoming round of machining demonstrations to show machining portability. National aeronautics and fod prevention at nasamarshall. Din 979 pdf online download and large discount to order now in spain. Nas 1638 national aerospace standard the nas system divides particles in 5 particle size ranges. Nas 412 is a national aerospace standard nas developed and published through the aerospace industries association aia. Toolpath planning and simulation for cutting test of non. Since it is only standard well known describing a fiveaxis machining test, it is widely accepted by many machine tool builders as one of final performance tests. Nas979 your online library of us and international standards. Variability in the geometric accuracy of additively. Foreign object damage fod any damage that has occurred to aircraft, vehicle, or persons, which can be attributed to an alien substance or article fo that has invaded any component of, on, or in an aircraft. Nas 979 has been used for over 40 years as a performance evaluation standard for fiveaxis machining centers. A guide for using this standard b thermal environment verification tests c seismic vibration verification tests d electrical power monitoring tests e machine functional tests f machine leveling and alignment g clarifications for cutting performance tests h laser and machine scale corrections i drift checks for sensors. Data sheet by aerospace industries association national aerospace standard, 10311971.
Machining the test part was part of a number of tests to evaluate machine performance. Code courses are developed and presented by respected industry experts who understand and can communicate code and standard relevance and their impact on safety, quality and integrity. Foreign object damage fod prevention program requirements. Uniform cutting tests nas series metal cutting equipment specifications data sheet by aerospace industries association national aerospace standard, 01151969 view all product details.
According to the national aerospace standards nas 412, most foreign object damage is attributable to four factors. This will only give you linear error, but its a start and something you can do yourself. Require this standard as a guide to be used with an end use type standard such as milstd1471 or milstd1515. Nas979 national aerospace standard is a spec for testing a cnc machine. Iso isotc 39sc 2 test conditions for metal cutting.
Use of other keys and pins requires approval of the government procuring activity. Pdf the machining of a cone frustum as specified in national aerospace standard nas 979 is widely accepted as a final performance test for fiveaxis. Nas 1823 interconnecting devices, electrical, wire terminating, bussing arrangement, blocks, nonfeedthru, contact size 20. The national aerospace standards nas are voluntary standards developed by the aerospace industry. The national aerospace standard nas 979 describes a fiveaxis machining test of a cone frustum. Uniform cutting tests nas series metal cutting equipment specifications. Submit a quote for a custom tool assesment or pricing on any standard or nonstandard tooling. Owing to nas 979 describes a cutting test for fiveaxis machine center with a universal spindle, several conditions for ctype machine tool have not been defined yet. Three and five axis machining plans for a nas 979 circlediamondsquare with an inverted nas 979 cone test in. There is a test you can run to check the accuracy of your cnc mill. Iso 107917 is also test conditions for machining centreregarding accuracy of finished test piece.
This standard applies to hexagon slotted and castle nuts with metric coarse and fine pitch thread and nominal thread diameter. Nas 979 national aerospace standard is a spec for testing a cnc machine. Feed drive ac servo drive with re circulating ball screw for all linear axes 4. However, this standard cannot be applied to the tilting. Provides a standard for the selection of cutting tests required to evaluate the performance of conventional and numerically controlled machine tools noted in paragraph 1. Sample transmission case being used by the stepnc machine development partners in the upcoming round of machining demonstrations to exercise capabilities with multiple setups.
The committees below can access the documents of isotc 39sc 2. Subject matter experts from aia member companies participate in committees and working groups to develop and maintain the nas library, which currently contains over 1400 active standards. The courses provide premier training on critical asme codes and standards. Nas979 uniform cutting tests nas series metal cutting. Nas standards brochure aerospace industries association. Aia is the national trade association representing u. As earlier noted, there is no fod prevention guidance material that provides a holistic approach for achieving a successful fod prevention program better than the standard. Data sheet by aerospace industries association national aerospace standard, 01151969. Plain bearings engineering rbc offers many types and sizes of plain bearings to the aerospace industry. This standard provides some finishing conditions of the conefrustum under fiveaxis control, and prescribes the measuring methods and permissible tolerances of geometric deviations.
In current iso standards, there is no description of a machining test for fiveaxis machining. A revised nas 412 standard will provide a benchmark resource at the forefront of fod. Nas 979 test part programmed using siemens 840d vector format and backplotted using cimco edit v7. Nas standards are published and ed by the aerospace industries association aia. Does nas test includes boring operation of 4 holes.
There is an increasing demand for realtime fault detection, and avoidance of destructive postprocess testing. Standard fod training is needed for support personnel accessing numerous fod sensitive areas to tailor nas 412 to address fod concerns specific to msfc hardware and facilities nas 412 was written with aircraft in mind while establishing a sound framework for fod prevention, it does not adequately address some fod hazards that. Accuracy of a finished test piece, international organization for standardization. Pdf machining tests to identify kinematic errors on five. This paper proposes a cutting test for a nonorthogonal swivel head and a rotary table type fiveaxis machine tool c type to evaluate its performance. Both metaltometal and selflubricating bearings are featured in this catalog.
Foreign object elimination foe elements of basic awareness. Sensorbased online process monitoring in advanced manufacturing david mathew roberson iii abstract effective quality improvement in the manufacturing industry is continually pursued. Five axis machining plan for a sample aerospace part provided by airbus. It involved a circle and a square at 45 degrees and some other cuts. Foreign object damage debris as9100 requires an organization to have provisions for the prevention, detection, and removal of foreign objects. Proposal of a machining test of fiveaxis machining centers.
982 246 552 970 54 1083 1292 1090 1487 373 955 822 627 340 592 965 584 1363 728 1155 615 1361 493 1377 688 1117 1323 804 1085 1119 565 616 1037 803 1310 225 1243 1218 51 350 396 332