Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Kistler 9272
Summary of Contents for Kistler 9272
- Page 1 Instruction Manual Quartz 4-Component Dynamometer Type 9272 9272_002-057e-09.08...
- Page 2 Instruction Manual Quartz Quartz 4- 4-Component Component Dyna- Dynamometer mometer Type 9272 Type 9272 9272_002-057e-09.08...
- Page 4 Foreword Foreword We thank you for choosing a Kistler quality product distin- guished by technical innovation, precision and long life. Information in this document is subject to change without notice. Kistler reserves the right to change or improve its products and make changes in the content without obliga- tion to notify any person or organization of such changes or improvements.
-
Page 5: Table Of Contents
Trouble shooting.......................... 24 Tracing Faults and Remedying Them.................. 24 Defective Dynamometer ....................25 Technical Data ..........................26 4-Component Dynamometer Type 9272 ................26 Technical Data for Turning; Force Acting onto Point A............28 Included Accessories......................29 Optional Accessories ......................29 Page 2 9272_002-057e-09.08... - Page 6 Content Annex ............................30 Glossary ..........................30 Measurement Uncertainty ....................33 Linearity..........................34 Frequency Range ........................36 Influence of Temperature....................37 Index ..........................39 Total pages 39 9272_002-057e-09.08 Page 3...
-
Page 7: Introduction
Please take the time to thoroughly read this instruction manual. It will help you with the installation, maintenance, and use of this product. Kistler offers a wide range of products for use in measuring technology: Piezoelectric sensors for measuring force, torque, strain,... -
Page 8: Important Information
Important Information 2. Important Information Please keep to the following rules without fail. This will en- sure your personal safety when working, and assure long, trouble-free performance by the instrument. 2.1 For your Safety This instrument has been tested thoroughly and it left the works in a perfectly safe condition. -
Page 9: How To Treat The Instrument
Please keep these Operating Instructions in a safe place where they can be consulted any time. If the instructions get lost, just turn to your Kistler customer service station and they will be replaced without delay. All information and directives in these instructions may be modified at any time without prior notification. -
Page 10: What Happens After Modifications
Modifications to instruments result in alterations of the op- erating instructions as a rule. In such cases, enquire at your Kistler customer service station about the possibilities of updating your documentation. Please note that all technical data and all other information in this section may be altered at any time without prior no- tice. -
Page 11: General Description Of The Instrument
Both the average value of the force and the dynamic force increase may be meas- ured. The usable frequency range depends mainly on the resonance frequency of the entire measuring rig. Fig. 1: 4-Component Dynamometer Type 9272 Page 8 9272_002-057e-09.08... -
Page 12: Functional Principle
General description of the instrument Most important applications for the multicomponent dy- namometer are: Measuring feed force, side force and moment in drilling, tapping etc. Measuring cutting forces in milling and grinding and turning high sensitivity and calibrated part ranges allow exact measurements even on small tools and when grinding;... -
Page 13: Design Of The Dynamometer
The dynamometer consists of a 4-component load washer sandwiched under high preload between a baseplate and a top plate. This preload is needed to transmit the friction forces. Fig. 3: Construction of the dynamometer Type 9272 1 4-Component Sensor 2 Baseplate 3 Top plate... -
Page 14: Assembly, Installation And Putting Into Operation
Assembly, Installation and Putting into Operation 4. Assembly, Installation and Putting into Operation 4.1 Important Remarks The multicomponent dynamometer Type 9272 is a preci- sion instrument, but its inherent accuracy can be exploited and retained only if it is treated with care. The following... -
Page 15: Basic Circuitry And Cabling Of The Measuring System
Quartz 4-Component Dynamometer Type 9272 To align the dynamometer on the machine table one of the use the three reference flats on the base plate Make sure that the dynamometer rests absolutely flat. Even the smallest air gap will cause undesirable elastic- ity and reduce the resonant frequency of the measuring rig. -
Page 16: Cutting Force Measurement In Drilling
Assembly, Installation and Putting into Operation 4.4 Cutting Force Measurement in Drilling Fig. 4: Cutting force measurement in drilling Drilling, countersinking, reaming and tapping all use a simi- lar machining process. The tools are mostly multiplepoint cutting tools. Drilling moment Feed force Are of particular interest for analyzing the drilling process. - Page 17 Quartz 4-Component Dynamometer Type 9272 Fig. 5: Fixing Workpiece Fig. 6: Measuring results in drilling of steel Parameter Material: USt 37-2 Diameter of drill 10 mm 10 mm 1 250 /min 35 m/min 0,1 mm/U Page 14 9272_002-057e-09.08...
-
Page 18: Force And Moment Measuring With 4 Components
For details, see the data sheet 5070A_000-485. 4.4.3 Data Acquisition and Evaluation Kistler DynoWare is an easy to use universal software and is ideal for multi-component force measurement with dy- namometers. For details, see the data sheet 2825A_000-371. -
Page 19: Force Application
Quartz 4-Component Dynamometer Type 9272 4.5 Force Application 4.5.1 Correlations for Simultaneous Loading in two or more Components The best results are obtained by nature of the system when set up out loading are symmetrical. The dynamometer is designed however to show minimal variations in sensitivity under eccentric loading. -
Page 20: Correlation F
Assembly, Installation and Putting into Operation 4.5.2 Correlation F – M If F and M act simultaneously verify with the diagram that the loading falls inside the hatched area. If F is acting eccentrically with respect to the z-axis, the resulting additional moment M must be considered for M (admissible). -
Page 21: Correlation F
Quartz 4-Component Dynamometer Type 9272 4.5.4 Correlation F – F If F and F act simultaneously and eccentrically, use the nomogram whether the loading remains within the admis- sible moment M The vertical eccentricity of F relates to the center of the sensor, which is 33 mm below the surface of the top plate. -
Page 22: Operation
Operation 5. Operation 5.1 Range Selection Use of charge amplifiers with sensitivity adjustment (such as Type 5070A…) is recommended for the multicompo- nent dynamometer Type 9272A. Adjust the sensitivities according to the data in the calibra- tion sheets for the channels F and M . - Page 23 Quartz 4-Component Dynamometer Type 9272 a Set the amplifier to <Reset>. Select the range for F as follows: 2 · 10 N/V (amplifier to <Long Time Con- stant>) b Switch the amplifier to <Operate> c Apply F (put the machine tool into operation) d After reading and/or recording the force, switch the amplifier back to <Reset>...
-
Page 24: Usable Frequency Range
Operation 5.3 Usable Frequency Range At the upper frequency limit the frequency behavior of the dynamometer shows oscillation with relatively little damp- ing. Frequencies up to about one-third of the natural fre- quency can be resolved without excessive measuring er- rors. -
Page 25: Temperature Influences
Quartz 4-Component Dynamometer Type 9272 5.4 Temperature Influences The temperature coefficient of the sensitivity (sensitivity change with temperature, the entire dynamometer being at the same temperature) is negligibly small. Temperature changes on the other hand give rise to an er- ror signal in the form of a zero drift. -
Page 26: Maintenance
Maintenance 6. Maintenance The multicomponent dynamometer Type 9272 is a de- pendable instrument requiring virtually no maintenance. To ensure long and reliable operation of the dynamometer, please read the next two sections. 6.1 Recalibrating the Instrument The dynamometer must be recalibrated for example after an uncontrolled overloading. -
Page 27: Trouble Shooting
Quartz 4-Component Dynamometer Type 9272 7. Trouble shooting 7.1 Tracing Faults and Remedying Them Below is a list of typical faults, together with their causes and remedies. If you cannot deal with a fault, please con- sult your Kistler distributor. -
Page 28: Defective Dynamometer
Trouble shooting 7.2 Defective Dynamometer Proceed as follows if your dynamometer is defective: Contact your Kistler distributor and advise him that you are sending in the defective instrument Send the defective dynamometer in its original packing to your Kistler distributor... -
Page 29: Technical Data
Quartz 4-Component Dynamometer Type 9272 8. Technical Data 8.1 4-Component Dynamometer Type 9272 Measuring range –5 ... 5 –5 ... 20 N·m –200 ... 200 Calibrated measuring range 0 ... 5 100 % 0 ... 20 N·m 0 ... 200 0 ... - Page 30 Degree of protection EN60529 – IP67 Weight Force application pont inside and max. 25 mm above top plate area Force application pont max. 20 mm from center With connecting cable Types 1677A5, 1679A5 Fig. 15: Dimensions of Dynamometer Type 9272 9272_002-057e-09.08 Page 27...
-
Page 31: Technical Data For Turning; Force Acting Onto Point A
Quartz 4-Component Dynamometer Type 9272 8.2 Technical Data for Turning; Force Acting onto Point A Range –2 ... 2 0 ... 4 Crosstalk ↔ F ≤±5 → F ≤±2 x, y → F ≤±5 x, y Natural frequency (x, y) ≈1,5... -
Page 32: Included Accessories
No accessories included in the scope of delivery. 8.4 Optional Accessories The following accessories are available for the 4-Com- ponent Dynamometer Type 9272: Fig. 17: Type 1677A5, Connecting cable (8-wire) Fig. 18: Type 1679A5, Connecting cable (8-wire) Fig. 19: Type 1678A5, Extension cable (8-wire) Fig. -
Page 33: Annex
The capacitance, and thus the length of the connecting Cable capacitance cable, has no influence on the measuring result when Kistler special cables and Kistler charge amplifiers are used. Measuring range or part of the measuring range for which Calibrated measuring range the sensor has been calibrated. - Page 34 Annex Disturbance Forces, moments and environmental influences acting on the sensor such as the temperature, which the sensor does not measure as a measurand and which produce an output signal (error). Example: when an additional bending mo- ment acts on a force sensor. Drift Unwanted changes in the output signal independent of the measurand as a function of time.
- Page 35 See "Coulomb". The characteristic of quartz crystals in which mechanical piezoelectric loading produces a proportional electric charge. quasistatic Describes the ability of Kistler sensors and charge amplifiers to undertake short-term measurements or DC-similar measurements. Range see "Measuring range" Scaling Output voltage per unit of the measurand at the analog or monitor output of a charge amplifier.
-
Page 36: Measurement Uncertainty
±1 % FSO Industrial charge amplifier Higher accuracy can be achieved with the following proce- dures: Calibration in the Kistler factory Calibration with charge amplifier Type 5395A Restriction of the temperature range Random errors, precision, reproducibility Precision or reproducibility is the extent of conformity between independent data measured under specified con- ditions. -
Page 37: Linearity
Errors due to zero drift caused by influences changing with time, such as the tem- perature, are thus basically excluded. With Kistler piezoelectric measuring chains, a typical repeat- ability within 0,1 % FSO can be assumed. 9.3 Linearity... - Page 38 Annex Best straight line – mathematical definition The minimization of maximum deviation is known as Che- byshev’s approximation. The best straight line is deter- mined as follows: = measurand (reference) = sensor charge signal or output signal from the charge amplifier Q (x) = calibration curve, rising and falling = slope of the best straight lines...
-
Page 39: Frequency Range
Quartz 4-Component Dynamometer Type 9272 9.4 Frequency Range Because of their mechanical quality, piezoelectric sensors have very low damping. The useful frequency range is lim- ited in the upwards direction by the increasing resonance rise. Key: f Measuring frequency Natural frequency... -
Page 40: Influence Of Temperature
Annex In their dynamic behavior, piezoelectric sensors are superior to all other measuring methods. Their high rigidity results in the highest possible natural frequencies. Piezoelectric sensors are thus ideal for measuring measurands which change rapidly over time. Their dynamic behavior is thereby largely determined by the surrounding structure. - Page 41 Quartz 4-Component Dynamometer Type 9272 Temperature gradient error (dynamic error) A temporary change in the output signal is denoted as temperature gradient error, when the temperature of the environment or surrounding medium changes with a cer- tain rate. In this case, the sensor is not in thermal equilib- rium with the environment.
-
Page 42: Index
Annex 9.6 Index 4-Component Sensor ........10 Linearity............31 Accuracy...........33, 36 Measurand ............ 31 Measuring chain ..........31 Measuring range..........31 Baseplate ............10 Measuring uncertainty ........33 Cable capacitance...........30 Natural frequency ........31, 36 Calibrated range ..........30 Calibration certificate........30, 32 Charge amplifier ........15, 30 Operating temperature ........
Need help?
Do you have a question about the 9272 and is the answer not in the manual?
Questions and answers