Precision of numerical control machine tool detects project and commonly used tool

1 preface is told to every factory, buying numerical control machine tool is the investment with quite considerable brushstroke. Produce backbone effect to make the equipment aborning of investment true, make sure treatment gives eligible part, reclaiming as soon as possible is crucial originally. Experience makes clear, the machine tool of 80 ％ above must be in when installation the ability after the spot is debugged accords with its technology index. When because this is in,new machine tool is checked and accept, want to undertake calibrating, make the machine tool is installed at the beginning can assure to achieve its technology index and expectant quality and efficiency. Additionally experience also makes clear, 80 ％ already threw the machine tool that production uses to be after use period of time, at blame is normal exceed function job status, exceed its to bear potentially even ability. Because after normally new machine tool is using half an year, this needs to undertake calibrating again, later but every yearly check is decided. Detect regularly machine tool error is seasonable and corrective pitch, backlash but cogent improvement produces the machine tool precision in using, improve a spare parts to machine quality, unapt generation waste, raise machine tool utilization rate greatly. Anyhow, announce in time machine tool problem can avoid to bring about loss of machine tool precision and ruinous ground to use a machine tool. The farther promotion as numerical control technology applies, the system measuring a head that more and more numerical control machine tools use oneself to contain will undertake dimension of workpiece, cutting tool detects reach undertake profile modeling is digitlized. Want to know the implementation of afore-mentioned functions, closely related the precision with machine tool oneself, if machine tool precision does not make fixed calibration, do not talk to go up to complete afore-mentioned works well and truly. Displacement of linear of interferometer of laser of ML10 of Lei Ni carry on measures software to be able to offer the data that has by undermentioned standard to analyse: BS4656 England 3 measure engine level; Standard of BS3800 England machine tool; Standard of ISO 230-2 international; Engineer of VDI/DGQ 3441 Germany learns machine tool standard; Engineer of VDI 2617 Germany learns 3 measure engine level; Standard of association of machine tool of NMTBA United States; GB10931-89 GB; ASME B89.

1.

Mechanical engineer of 12M United States learns a standard; ASME B5.

Mechanical engineer of 54 United States learns a standard; E60, 099 France standard; Level of JISB2330 Japan state. Ni Shaogong of 2 England thunder manages company of carry on of Lei Ni of advanced technique England is the cosmopolitan transnational corporation that pursues testing instrument of design, production high accuracy and facility technically. Main product measures machine and numerical control machine tool to use for 3 coordinate measure appearance of lever of interferometer of head, laser, ball to wait, before offerring order for mechanical production industry (laser interferometer and ball lever appearance) , in foreword (numerical control machine tool measures a head to reach pair of knives to measure a head with workpiece) with foreword hind (3 measure machine with measure head and configuration) assure a method what detect into series quality. Her all technology and product aim to assure precision of numerical control machine tool, improve performance of numerical control machine tool, improve efficiency of numerical control machine tool, can assure and improve the treatment precision of machine tools of manufactory of numerical control machine tool and quality, enlarge the market of finished products. 2.

Interferometer of laser of ML10 of carry on of Lei Ni of 1ML10 laser interferometer offerred instrument of a kind of high accuracy for machine tool calibrating, its precision is tall, achieve ± 1.

1PPM (in 0 ～ 40 ℃ fall) , measure range big (linear measures long 40m, optional 80m) , measure speed fast (60m/min) , resolution is high (0.

001 μ M) , portable sex is good. As a result of Leinishao laser interferometer has error of transfer matic sex to compensate a function, can go to the lavatory restore machine tool precision, more be welcomed by the user! Detecting to make everybody understands ML10 laser interferometer further the distinct advantage that place of field of precision of numerical control machine tool has, the application in introducing ML10 laser interferometer to detect in precision is stressed below. (1) geometrical precision detects can use at detecting linearity, verticality, a simple move or action and slant place, flatness, parallelism. (2) of positional precision detect reach its automatic compensation can detect precision of fixed position of numerical control machine tool, repeat fixed position precision, minim displacement precision to wait. Use interferometer of laser of ML10 of Lei Ni carry on to be able to measure the error of the machine automatically not only, and still can pass RS232 interface to undertake automatically compensating to its linear error, than normally compensation method saved a large number of time, and avoided manual computation and hand use the handlers error that numerical control is keyed in and causes, at the same time but the compensation point number that utmost ground chooses the axis that be measured to go up, make the machine tool achieves optimal precision, additionally handlers need not have machine tool parameter and the knowledge that compensate a method. Current, the compensation software that can offer an alternative has Fanuc, siemens 800 series, UNM, mazak, mitsubishi, cincinnati Acramatic, heidenhain, bosch, allen-Bradley. (3) of precision of graduation of numerical control revolving stage detect reach its to be compensated automatically now, use ML10 laser interferometer to add RX10 revolving stage fiducial measure automatically what still can undertake rotor. It can is opposite aleatoric angle position, undertake with aleatoric angle interval full automatic measure, its precision amounts to ± 1. New international standard already was recommended use this new technology. It is used from collimation appearance and polyhedral method than the tradition not only managing many measurement time, and still get complete rotor precision curve, witting the each detail of its precision, the statistical result that gives out to be handled by relative standard. (4) of precision of double axis fixed position detect reach its to compensate Leinishao automatically system of double laser interferometer can measure machine tool of numerical control of movable type of large dragon door with pacing, by the fixed position precision that axial of some of double servo drive moves, and still can pass RS232 interface, undertake automatically compensating respectively to error of two axes sex. (5) performance of trends of numerical control machine tool detects use RENISHAW dynamic character to measure with evaluate software, usable laser interferometer undertakes test of machine tool vibration and analysis (FFT) , the dynamic character of ball guide screw is analysed, the response of servo drive system is characteristic analysis, the trends of slideway is characteristic (low speed is creeping) the analysis. 2.

Appearance of 2QC10 ball lever detects in precision of numerical control machine tool in, appearance of QC10 ball lever and ML10 laser interferometer are two kinds of each other for complementary instrument, be short of one cannot. ML10 laser interferometer is emphasized detect each precision of the machine tool; And the account that appearance of QC10 ball lever basically uses affirmatory machine tool to lose precision and the breakdown of diagnostic machine tool. But compare with ML10 laser interferometer, lever appearance still does not have QC10 ball to be understood by broad user place at present. To the introduction will be emphasized under this principle of appearance of QC10 ball lever, function reachs the application in detect. 2.

2.

1 what is Buddhist nun of thunder of ball lever appearance appearance of lever of ball of carry on QC10 is to be used at numerical control machine tool precision of two axes linkage detects quickly a kind of tool that analyses with machine tool breakdown. It is formed in the sensor of high accuracy displacement inside stretch fiber lever by one installation, this sensor includes two coil mix portable inside lever, its job principle kind with at using the displacement sensor of LVDT technology. When its length varies, inside lever is immigrant coil, inductance happening changes, detect change of signal of circuit general inductance is into resolution 0.

Signal of displacement of 1 μ M, pass into a PC through interface. Interferometer of laser of its precision classics detects amount to ± 0.

5 μ M(is in 20 ℃ ) . Press when the machine tool when booking a program to go round for radius with length of ball lever appearance, QC10 sensor detects the change of direction of radius of machine tool motion, QC10 of Lei Ni carry on analyses software but rapid if the scale of the linearity the machine tool, verticality, repeatability, backlash, each axis is denied match the depart in reaching servo function to wait for the change from radius to come out. 2.

2.

2 main functions (1) the fast demarcate of machine tool accuracy class detects through ball lever instrument is being used below different feed speed machine tool, the feed speed that makes handlers can choose precision of contented treatment workpiece to ask undertakes machining, avoided the generation of reject thereby. (2) diagnose of machine tool breakdown and problem quickly with the analysis ball lever appearance can be found out quickly and problem of analytic machine tool is in, basically can check retrorse difference, guide screw carries unoccupied place difference on the back, servo gain does not match, the function such as error of verticality error, filar lever cycle, for example machine tool produces postaccident hitting a car, appearance of usable ball lever detects and tell handlers machine tool precision to the state is reached quickly whether can continue to use. Already stipulated in ISO standard appearance of the lever that use a ball detects the method of machine tool precision. (3) of convenient machine tool maintain with safeguard ball lever appearance to be able to tell precision of user machine tool metabolic circumstance, can remind maintenance the engineer notes the problem of the machine tool so, undertake preventive safeguard, do not send lead to big trouble. (4) shorten development cycle of new machine tool detects with ball lever appearance can divide separate out machine tool lubricant system, servo, bearing deputy the chooses property of pair of machine tool precision influence that wait. Can change original design according to checking a circumstance so, shorten consequently development of new machine tool is periodic. (5) convenient machine tool checks and accept an experiment to be opposite for machine tool manufactory, appearance of usable ball lever has machine tool routine inspection test quickly, check its precision to whether achieve design requirement. Ball lever appearance already was examined by international machine tool now the standard is like ISO230, ANSI B5.

54 recommend use. To factory of machine tool user, appearance of usable ball lever will undertake the machine tool checks and accept an experiment, in order to replace cutting of NAS test specimen, or detect in appearance of the lever that use a ball test specimen is cut again after good machine tool can. 2.

2.

3 jobs precision detects appearance of QC10 ball lever is a kind fast (10 ～ 15min) , ground of convenient, economy detects numerical control machine tool the instrument of function of two axes linkage, can use at replacing the cutting of NAS test specimen of working precision. CNC Milling