1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: 403 SCMS/ GUEEA, Robins AFB GA 31098-1813. Since contact information can change, you may want to verify the currency of this address information using the A
2、SSIST Online database at https:/assist.daps.dla.mil/online . FSC 6635 INCH-POUNDA-A-59882 12 Jan 2011 COMMERCIAL ITEM DESCRIPTION GEOMETRY MEASURING MACHINE The General Services Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This Commerc
3、ial Item Description (CID) covers the circular geometry measuring machine and components. 2. SALIENT CHARACTERISTICS 2.1 Circular geometry measuring machine and components description. Each circular geometry measuring machine shall be a bench top model. Each circular geometry measuring machine shall
4、 have a minimum weight capacity of 40 pounds. Each circular geometry measuring machine shall use a mechanical bearing to eliminate the need for an air compressor. 2.1.1 Electrical power requirements. Each circular geometry measuring machine must be capable of operating using 120-volt, 60 Hz electric
5、al power requirements. 2.1.2 Vertical column. Each circular geometry measuring machine shall be equipped with a column that extends at least 20 inches above the rotary table top to allow parts up to 20 inches in length to be inspected/measured and shall meet the following requirements: 2.1.2.1 Gage
6、head movement. The vertical column shall be designed to allow the gage head to be elevated or lowered and allow for the precision alignment (centering and tilting) of cylindrical parts. The mechanism of elevating and/or lowering the gage head can be controlled manually or with the use of an electron
7、ic controller. In either case, the movement shall be smooth. Systems that use movable vertical height gage stands instead of permanently mounted vertical columns must include two height gage stands and two gage heads. The gage head amplifier shall allow the use of two gage heads during the alignment
8、 (tilt and centering) of cylindrical parts under test. The two vertical height gage stands must be of equal length. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59882 2 2.1.3 Rotary table. Each circular geometry measuring machine shall be equi
9、pped with a rotary table that meets the following requirements: Minimum of 5 inches in diameter. Shall include tilt and centering adjustment knobs. The tilt and centering functions for the rotary table shall be adjusted using computer aided displays and manual adjustment. The tilt axis location for
10、the rotary table shall be identified to ensure proper placement of gage head during tilt/centering functions for cylindrical parts. 2.1.4 Test sphere. A test sphere shall be provided with each circular geometry measuring machine and shall conform to the following requirements: Manufactured from soli
11、d chromium carbide type steel, approximately 0.5 inches in diameter. Out of roundness shall not exceed 5 microinches (in). It shall be mounted on a base that will allow easy access to the equator. Each test sphere shall have a protective covering that screws over the sphere or fitted in a hard wood
12、box with positive action latches. 2.1.5 Work table. Each circular geometry measuring machine shall include a sturdy work table suitable for placing the circular geometry measuring machine and computer components on and performing measurements. The work table shall be a minimum of 32 inches in height
13、. The work table shall include a storage drawer for various components. 2.1.6 Electronic gage head. Each circular geometry measuring machine shall include a minimum of one electronic gage head/amplifier and stylus assortment. The amplifier display shall have the capability to change resolution for v
14、isual evaluation based on part geometry. Display resolutions shall include: 5 in per minor division, 10 in per minor division, 20 in per minor division, 50 in per minor division, 100 in per minor division, 200 in per minor division, 500 in per minor division. 2.1.7 Computer PC. The circular geometry
15、 measuring machine shall be computer/software/menu driven using Microsoft Windows based Operating System. Computer system shall include the following: 2.1.7.1 Monitor. Minimum, 17 inch flat screen monitor with at least 1280 x 1024 resolution. 2.1.7.2 Printer. Color inkjet printer with at least 720 d
16、pi resolution. 2.1.7.3 Keyboard and mouse. QWERTY keyboard with numeric key pad and standard two button optical mouse with scroll. 2.1.7.4 Memory. Minimum 512 MB. 2.1.7.5 Hard drive. At least 160 GB hard drive SATA or better. 2.1.7.6 Removable media. 3.5 inch floppy drive and CDR drive; DVR drive op
17、tional. 2.1.7.7 Video card. As required for operation of system. 2.1.7.8 Other hardware. Any other hardware required to make this system function as required by the commercial item description will be required. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
18、 IHS-,-,-A-A-59882 3 2.2 Safety. All space in which work is performed during operation, service, and maintenance shall be free of hazardous protrusions, sharp edges, or other features which may cause injury to personnel. 2.3 Diagnostic software. A copy of any diagnostic software required or recommen
19、ded for maintaining the circular geometry measuring machine shall be provided with each circular geometry measuring machine on CD-ROM or DVD-ROM. 2.4 Performance. Each circular geometry measuring machine shall have the capability to measure out of roundness, concentricity, circular flatness, perpend
20、icularity and runout of spherical and cylindrical parts up to 20 inches in length. 2.4.1 Radial bearing accuracy. The radial bearing accuracy shall not exceed 5 in. 2.4.2 Axial bearing accuracy. The axial bearing accuracy shall not exceed 5 in. 2.4.3 Coning accuracy. The coning accuracy shall not ex
21、ceed 5 in plus 1 in per inch. 2.4.4 Gage head/amplifier accuracy. The gage head/amplifier accuracy shall not exceed 10 in. 2.4.5 System software. The system software shall provide reference circles, as identified below, for circular measurement evaluation. 2.4.5.1 Reference circles. The system softw
22、are shall provide the following reference circles: Minimum Circumscribed Circle (MCC), Maximum Inscribed Circle (MIC), Least Squares Circle (LSC). 2.4.5.2 Response variables. The system software shall include response variables, undulations per revolution (UPR), and other filtering techniques to red
23、uce the effects of surface finish. 2.4.5.3 Data retention. The system software shall have the capability to retain circular measurement data so it can be recalled for re-evaluation by changing measurement analysis parameters. 2.4.5.4 Data recall. The system software shall have the capability to reca
24、ll circular measurements and combine multiple circular graphs onto one graph with separation between each so they are not overlapped. 2.5 Operator/users manual. The operator/users manual shall include the following documentation: 2.5.1 Calibration instructions. Detailed instructions shall be provide
25、d for calibrating the gage head/amplifier using gage blocks. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59882 4 2.5.2 Accuracy instructions. Detailed instructions shall be provided for performing the radial bearing accuracy, coning bearing a
26、ccuracy and axial bearing accuracy calibration/verification using the provided test sphere and the reversal calibration method as described in ANSI B89.3.1-1972. The reversal method requires the precision sphere to be rotated 180 and the gage head re-located to the 180 position. Two circular profile
27、s are measured and printed on one circular graph with separation between the two profiles. 2.5.4 Data graphing. Detailed instructions shall be provided for placing a multiple circular graphs onto one chart with separation between them. 2.5.5 Data export. Detailed instructions shall be provided for a
28、ccessing the recorded/saved data points and exporting the data into an excel spreadsheet for bearing accuracy analysis. 2.5.6 Additional instructions. Additional instructions shall be provided in the Operator/Users Manual including: How to change range/resolution. How to change filtering/UPR. How to
29、 change reference circles. How to center a sphere and measure the out of roundness. How to align (Tilt b) meet appropriate performance standards, or c) at a reasonable price. The prime contractor is responsible for ensuring that all subcontractors comply with this requirement. 4. PRODUCT CONFORMANCE
30、 PROVISIONS. The products provided shall meet the salient characteristics of this Commercial Item Description, conform to the producers own drawings, specifications, standards, and quality assurance practices, and be the same product offered for sale in the commercial marketplace. The government res
31、erves the right to require proof of such conformance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59882 5 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First production inspectio
32、n (see 4.2). b. Conformance inspection (see 4.3). 4.2 First production inspection. The first production circular geometry measuring machine shall be subjected to the examinations, tests, and analyses described in 4.5.1 through 4.5.7. The contractor shall provide or arrange for all test equipment and
33、 facilities. 4.3 Conformance inspection. Each production circular geometry measuring machine shall be subjected to the examinations and tests described in 4.5.6. 4.4 Inspection requirements. 4.4.1 General inspection requirements. Apparatus used in conjunction with the inspections specified herein sh
34、all be laboratory precision type, calibrated at proper intervals to ensure laboratory accuracy. 4.4.2 Data. During all testing specified herein, at least the following data, unless not applicable, shall be recorded at intervals not to exceed 30 minutes. Additional data or shorter intervals shall be
35、provided as appropriate for any specific test. a. Date. b. Time started. c. Time finished. d. Results. 4.4.3 Test rejection criteria. Throughout all tests specified herein, the circular geometry measuring machine shall be closely observed for the following conditions, which shall be cause for reject
36、ion: a. Failure to conform to salient characteristics, design or performance requirements specified herein or in the contractors technical proposal. b. Structural failure of any component, including permanent deformation, or evidence of impending failure. c. Evidence of excessive wear. d. Conditions
37、 that present a safety hazard to personnel during operation, servicing, or maintenance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59882 6 4.5 Test methods. 4.5.1 Examination of product. Each circular geometry measuring machine shall be exam
38、ined to verify compliance with the requirements herein prior to accomplishing any other tests listed in 4.5. A contractor-generated, Government-approved checklist shall be used to identify each requirement not verified by a test or analysis, and shall be used to document the inspection results. Part
39、icular attention shall be given to materials, workmanship, dimensions, surface finishes, protective coatings and sealants and their application, and markings. Proper operation of each circular geometry measuring machine function shall be verified. Certifications and analyses shall be provided in acc
40、ordance with Table I. 4.5.2 Inspection of product. The first production unit (circular geometry measuring machine) will be inspected at the AFPSL (Air Force Primary Standards Laboratory). 4.5.3 Traceability. All test equipment is directly traceable to the National Institute of Standards and Technolo
41、gy (NIST). 4.5.4 Accuracies. The mechanical bearing accuracies (see following table) will be calibrated/verified using a test sphere and reversal calibration method described in the instructions provided by the manufacturer. Mechanical bearing accuracies to be calibrated/verified are listed in Table
42、 I. TABLE I. Certifications and analyses. Paragraph Required Certifications and Analyses 2.4.1 Radial bearing accuracy. Contractor certification that the circular geometry measuring machine, radial bearing accuracy meets the requirements of section 2.4.1. 2.4.2 Axial bearing accuracy. Contractor cer
43、tification that the circular geometry measuring machine, axial bearing accuracy meets the requirements of section 2.4.2. 2.4.3 Coning accuracy. Contractor certification that the circular geometry measuring machine, coning accuracy meets the requirements of section 2.4.3. 4.5.5 Gage block calibration
44、. The gage head/amplifier will be calibrated using gage blocks owned by the Air Force following instructions provided by manufacturer. 4.5.6 Acceptance. The circular geometry measuring machines will be inspected and accepted at destination as specified elsewhere in this contract. The circular geomet
45、ry measuring machines will be checked to assure specified performance requirements are met. Test equipment used will have first echelon certification directly traceable to the NIST where required. Tests will be performed to assure the circular geometry measuring machine meet the requirements of para
46、graphs 2. to 2.4.5.4 of this commercial item description. Such testing at destination does not Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59882 7 relieve the contractor of performing all inspection and quality checks at the point of fabricat
47、ion, or as necessary to assure performance as specified herein. 4.5.7 Dimension measurement. A first production circular geometry measuring machine shall be measured to demonstrate compliance with the dimensional requirements of 2.1 through 2.1.7.8. 5. PACKAGING. 5.1 Preservation, packing, and marki
48、ng shall be as specified in the contract or order. 6. NOTES. 6.1 Source of documents. 6.1.1 Department of Defense and Federal documents may be obtained at https:/assist.daps.dla.mil/online or from the Document Automation and Production Service, Bldg 4D (DPM-DODSSP), 700 Robbins Avenue, Philadelphia
49、PA 19111-5094. 6.1.2 FAR and DFARS may be obtained from the Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954. Electronic copies of the FAR may be obtained from http:/www.arnet.gov/far Electronic copies of the DFARS may be obtained from http:/www.acq.osd.mil/dpap/dars/dfars/index.htm . 6.1.3 ANSI/EIA standards may be obtained at http:/www.ansi.org or http:/www.eia.org or
