DLA A-A-59266-1998 GRINDING MACHINE UNIVERSAL CYLINDRICAL EXTERNAL CENTER-TYPE [Superseded DLA MIL-G-23823 E CANC NOTICE 1 DLA MIL-G-23823 E DLA MIL-G-23823 D DLA MIL-G-23823 C DLA.pdf

1、Beneficial comments, recommendations, additions, deletions, clarifications, etc., and any datawhich may improve this document should be sent to: Defense Supply Center Richmond,ATTN: DSCR-VBD, 8000 Jefferson Davis Highway, Richmond, VA 23297-5610.AMSC N/A FSC 3415DISTRIBUTION STATEMENT A . Approved f

2、or public release; distribution is unlimited.INCH-POUNDA-A-592662 October 1998SUPERSEDINGMIL-G-23823E16 April 1991COMMERCIAL ITEM DESCRIPTIONGRINDING MACHINE, UNIVERSAL, CYLINDRICAL, EXTERNAL, CENTER-TYPEThe General Services Administration has authorized the use of this commercialitem description fo

3、r all federal agencies.1. SCOPE. This commercial item description (CID) covers cylindrical universal grindingmachines intended for grinding workpieces where uniform tolerances for size, roundness, andfinish on a wide variety of materials are required.2. CLASSIFICATION. The cylindrical universal grin

4、ding machines shall be of the following typesswings, and sizes. The type, swing, and size to be furnished shall be as specified (see 7.2(b).Type I - Standard performanceType II - H igh performanceSwing - See table ISize - See table IProvided by IHSNot for ResaleNo reproduction or networking permitte

5、d without license from IHS-,-,-A-A-592662TABLE I. Machine swings and sizes .Swing, Size center-to-center distance, inchesinches 16 20 24 26 36 40 48 60 72 80 96 1208 X X X X X X X X X10 X X X X X X12 X X X X X X X X X X14 X X X X X X X X18 X X X X X24 X X X X X X30 X X X X XNOTE: “X” denotes availab

6、ility.3. SALIENT CHARACTERISTICS3.1 General requirements . The grinding machine shall be new and one of the manufacturerscurrent models capable of operation in accordance with the requirements herein. All parts subjectto wear, breakage, or distortion shall be accessible for adjustment, replacement,

7、and repair.3.1.1 Identification of axis . Unless otherwise specified (see 7.2(c), all axes of the grindingmachine shall be identified in accordance with American National Standards Institute(ANSI)/Electronics Industries Association (EIA) 267.3.2 Components . The grinding machine shall include, as a

8、minimum, the following components:3.2.1 Bed and base . The bed and base material shall be of sufficient strength and rigidity tosupport the machine components and to withstand the vibration, stress, and loads imposed on themachine during operation. The bed shall support and allow for precision movem

9、ent of thetraversing table and the grinding wheel base assembly. A means shall be provided for leveling andanchoring the machine to the floor. Access doors or removable panels shall be provided forservicing components housed within the base.3.2.2 Workhead . Unless otherwise specified (see 7.2(d), th

10、e workhead shall have the capabilityfor live and dead center grinding, with provisions for changeover to either operation. Theworkhead shall support the workpiece using chucks or collets. Unless otherwise specified(see 7.2(e), spindle noses and tapers shall conform to the manufacturers standard. The

11、workhead shall swivel on its base a minimum of 90 degrees toward the wheelhead to facilitateangle and face grinding. The workhead shall have means to indicate swivel position in degreesand provisions for securing the workhead in the desired position within the swivel range. Theworkhead shall rotate

12、the workpiece during grinding.3.2.3 Tailstock . A tailstock shall be provided for support of longer workpieces. The tailstockshall be longitudinally adjustable along the swivel table. Means for securing the tailstock afteradjustment shall be provided. Unless otherwise specified (see 7.2(f), the inte

13、rnal taper of thetailstock center shall be the manufacturers standard.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5926633.2.4 Traversing table . The traversing table shall support a swivel table and its attachedcomponents. The longitudinal tr

14、averse distance shall be adjustable. Unless otherwise specified(see 7.2(g), the traversing table shall have automatic movement with a fast and normal traverserate, automatic reversal at a preset point, and shall traverse longitudinally on the bed.3.2.5 Swivel table . The swivel table shall be mounte

15、d on the traversing table and shall be capableof swiveling in the horizontal plane for grinding included angles and tapers. The swivel table shallhave means to indicate swivel position in increments of 1 degree or less and provisions forsecuring the swivel table in the desired position within the sw

16、ivel range. The number and size ofT-slots shall be as specified (see 7.2(h). The dimensions of the T-slots shall conform to therequirements of ANSI B5.1.3.2.6 Wheelhead assembly . The wheelhead shall swivel to allow for angle, face, and tapergrinding of the workpiece. The grinding wheelhead assembly

17、 shall include a wheelhead housing,spindle, grinding wheel, spindle drive system, and internal grinding assembly. The wheelhead shallbe mounted on the bed and shall traverse across the table. Unless otherwise specified (see 7.2(i),the minimum crossfeed range shall allow the perimeter of the maximum

18、diameter grinding wheelto traverse to the workpiece centerline. A graduated scale shall be provided to indicate swivelposition in increments of 1 degree or less. A means shall be supplied for locking the wheelhead inplace after positioning. The wheelhead shall be designed to accept grinding wheels o

19、f differingoutside diameters.3.2.6.1 Spindle . The spindle shall accept standard commercial grinding wheels. The spindle shallrotate the grinding wheel at a speed sufficient to perform all tests referenced in section 5.3. If thespindle is driven by a belt and pulley, a manual or automatic mechanism

20、to adjust belt tension shallbe provided. Unless otherwise specified (see 7.2 (j), the spindle horsepower shall be thatconsidered as standard by the manufacturer.3.2.6.2 Grinding wheel . A grinding wheel(s) shall be provided as specified (see 7.2(k). Thewheels shall conform to ANSI B74.2, marked in a

21、ccordance with ANSI B74.13, and shall meetthe safety requirements established in ANSI B7.1.3.2.7 Internal grinding assembly . The grinding machine shall be equipped with an internalgrinding assembly consisting of a spindle, quills, and drive assembly. The spindle shall bedesigned to allow use of a v

22、ariety of grinding wheel sizes and quills.3.2.8 Controls . The manufacturer shall supply manual and automatic controls for operation ofthe machine. The controls shall be easily seen and conveniently operated from the control station.All components of the control system shall be protected from damage

23、 caused by the normalgrinding environment of vibration, coolant splash, grinding swarf or dust, and electric powerfluctuations.3.2.8.1 Control panel . Unless otherwise specified (see 7.2(l), the control panel shall include, asa minimum, the following manual controls and switches:a. Emergency stop bu

24、tton.b. Power on/off switches.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-592664c. Coolant flow.d. Grinding wheel rotation.e. Wheelhead assembly infeed (fast and normal).f. Grinding feedrate.g. Traversing table motion (fine and coarse).h. Wor

25、khead rotation.i. Sparkout timing mechanism.3.2.8.2 Automatic controls . An automatic infeed cycle for plunge and traverse grinding shall beprovided. The automatic cycle shall include a means of controlling infeed increments at desiredreversal and for limiting the total infeed for traverse grinding

26、cycle. A safety interlock shall preventsimultaneous operation of the automatic and manual wheelhead infeed. After completion of theautomatic cycle, the machine shall be able to repeat the automatic cycle without further adjustment orinput using the start or repeat switch. Unless otherwise specified

27、(see 7.2(m), automatic controls shallbe provided, as a minimum, for the following functions:a. Wheelhead assembly infeed.b. Traversing table motion.c. Workhead rotation.d. Grinding wheel rotation.e. Coolant flow.f. Sparkout.g. Grinding feedrate.3.2.8.3 Electronic control system . Unless otherwise sp

28、ecified (see 7.2(n), an electronic controlsystem with closed loop feedback capability and a digital readout system shall be supplied with thegrinding machine. The digital readout display shall indicate wheelhead and table position over theentire travel range of each axis. The digital readout display

29、 shall be visible to the operator whilecontrolling the grinding machine. The system shall have an accuracy of 0.00001 inch.3.2.9 Lubrication system . Unless otherwise specified (see 7.2(o), the grinding machine shall beequipped with an automatic lubricating system to direct oil flow from the reservo

30、ir to all machinecomponents requiring continuous lubrication. A means shall be provided for determining oil levelin the reservoir. The automatic lubricating system shall include a cleanable or replaceable filter.Upon loss of pressure in the automatic lubrication system, the grinding machine shallaut

31、omatically stop. Machine parts requiring periodic manual lubrication shall be readily accessiblethrough doors or removable panels.3.2.10 Coolant system . Unless otherwise specified (see 7.2(p), the grinding wheel shall be floodcooled. As a minimum, the coolant system shall consist of a reservoir, pu

32、mp, strainer, and allnecessary piping. The system shall be equipped with a method to control the rate of coolant flowfrom the reservoir and to direct coolant flow to the grinding area. When specified( see 7.2(q), an optional filtration system shall be provided.3.2.11 Hydraulic system . When provided

33、, the hydraulic system shall conform to the requirements ofNational Fluid Power Association (NFPA) T2.24.1. The hydraulic system shall be complete andinclude all pumps, valves, piping, cylinders, and controls. Means shall be provided to prevent damageProvided by IHSNot for ResaleNo reproduction or n

34、etworking permitted without license from IHS-,-,-A-A-592665to the components from overpressure. A filter system shall be provided to ensure delivery of cleanfluid. The hydraulic reservoir shall have means for determining fluid level.3.2.12 Electrical system . Unless otherwise specified (see 7.2(r),

35、the electrical system shall conformto the ANSI/National Fire Prevention Association (NFPA) 79. The machine shall have dual 230/460-volt, 3-phase, 60-hertz circuit capability and shall be wired for the voltage specified (see 7.2(s).Unless otherwise specified (see 7.2(t), the control system power shal

36、l be provided by a separate 120-volt, single-phase, 60-hertz circuit from the machine main power supply.3.2.13 Electric motors . The wheelhead and internal grinding (if applicable) drive motor(s) shallhave sealed and permanently lubricated ball or roller bearings, shall be energy efficient, and shal

37、lconform to the National Electrical Manufacturers Association (NEMA) MG-1. Unless otherwisespecified (see 7.2(u), the motors shall have open dripproof enclosures. Each motor control shallconform to NEMA ICS-1 and ICS-3.3.2.14 Optional accessories . Optional accessories shall be provided as specified

38、 (see 7.2(v).3.3 Performance . Unless otherwise specified (see 7.2(w), the grinding machines shall meet thealignment and performance requirements shown in tables II and III, respectively, when tested inaccordance with section 5.3 through 5.4.TABLE II. Alignment requirements .Performance typeParamete

39、r Type I - standard performance Type II - high performanceTable straight in horizontaldirection0.00028 inch per foot TIR 1 ,maximum 0.0021 inch 20.00018 inch per foot TIR,maximum 0.00135 inch 2Table flat or level in verticaldirection0.00028 inch per foot TIR,maximum 0.0021 inch 20.00018 inch per foo

40、t TIR,maximum 0.00135 inch 2Guideways of headstock andtailstock parallel with tablemovement0.00014 inch per foot TIR,maximum 0.0011 inch 20.00009 inch per foot TIR,maximum 0.00068 inch 2Axis of headstock parallel withtable movement in vertical plane 0.0006 inch per foot, TIR 0.0004 inch per foot, TI

41、RAxis of headstock parallel withtable movement in horizontal plane 0.0006 inch per foot, TIR 0.0004 inch per foot, TIRCenter point for true running 0.0003 inch, TIR 0.00015 inch, TIRSleeve parallel with tablemovement in vertical plane 0.0025 inch per foot, TIR 0.0015 inch per foot, TIRTaper of spind

42、le running true 0.0006 inch, TIR 0.0004 inch, TIR1 TIR is total indicated reading.2 Maximum rated center-to-center distance. Swing or distance between centers of less than 1 foot are toconsider their swing or center distance as 1 foot.Provided by IHSNot for ResaleNo reproduction or networking permit

43、ted without license from IHS-,-,-A-A-592666TABLE III. Performance requirements .Performance typeParameter Type I - standard performance Type II - high performanceSurface straightness 0.0001 inch per foot TIR 1 ,0.0005 inch maximum0.00005 inch per foot TIR,0.00025 inch maximumRoundness 0.0001 inch pe

44、r foot of swing diameter 2 , TIR 0.00005 inch per foot of swing diameter 2 , TIRRepeatability 0.0001 inch 0.00005 inchSurface roughness 5 microinches, R t 3 5 microinches, R t 3Inside surface roughness 5 microinches, R t 3 5 microinches, R t 3Inside straightness 0.0001 inch, TIR 0.00005 inch, TIRInc

45、lination 0.011 degree 0.006 degree1 TIR is total indicated reading.2 Swing or distance between centers of less than 1 foot are to consider their swing or center distance as 1foot.3 Rt is total roughness as defined in American Society of Mechanical Engineers (ASME) B46.1, with anevaluation length of

46、0.1 inch.3.4 Machine dimensions and weight . If required, the maximum machine dimensions (length,width, and height) and machine weight shall not exceed the restrictions specified (see 7.2(x).3.5 Safety and health requirements . The machine shall be designed and manufactured inaccordance with ANSI B1

47、1.9. The manufacturer shall ensure that the machine and all equipmentand accessories used on the machine shall be in compliance with Occupational Safety and HealthAdministration (OSHA) 29 CFR PART 1910. If a conflict arises between the ANSI B11.9 andOSHA standards, the OSHA standards shall apply.3.6

48、 System of units . The U. S. Customary System of Units (US) or the International System ofUnits (SI) shall be used to graduate measuring and indicating devices. When only one system ofgraduation is acceptable, the particular graduation required shall be as specified (see 7.2(y).Regardless of the mea

49、surement system used, all measuring and indicating devices on the machineshall be graduated in the same system. When specified (see 7.2(z), measuring and indicatingdevices shall be graduated in both the US and SI system of measurements.3.7 Nameplate . A nameplate shall be securely attached to the machine. Unless otherwisespecified (see 7.2( aa), the nameplate shall contain the following information:a. Nomenclature.b. Manufacturers name.c.