User manual - PDF file
Contents
1. WISE forensic science systems Certified Quality Management System MAGNETO OPTICAL DEVICES For nondestructive investigation of the metal surface EDDY CURRENT MAGNETOGRAPHING DEVICE OF THE METAL SURFACE REGULA model 7515 For MODs REGULA model 7505M Operating Manual 2010 CONTENTS INTRODUCTION ita ai a Dialed Ra O 4 1 DESCRIPTION AND OPERATION sssaaa uaaa ae 5 1 1 DEVICE FUNCI N sosai s nes EEEREN E E E 5 1 2 Technical characterisStiCS o ooooooooo ooo 5 1 3 Device COMPOSITION dr sari coca ra a wee see bl a fone 6 1 4 Structure and Operation of the Device 6 1 5 Means of Measurement the Tool and Accessories 13 136 Marking 5 240 ici ae A a ls A ia 16 1 7 Packing sa evi ic a a Be Rw a Re RE Ee 17 2 INTENDED USE isa pad nena iya e e a ee ae OR A a a i 18 2 1 Operating limitations 0 0 eee o 18 2 2 Preparation for USE a cs ccs cee ee ee eee 19 2 3 DEVICE USE ry cree ane ale A le 19 3 TECHNICAL MAINTENANCE o 30 3 1 General inStructiONs ya a a a e 30 3 2 Safety MeaSUFES a ici a o de e aso de AR 31 3 3 Operational Serviceability Check 31 4 ROUTINE REPAIRS y e as a A ea ae Rl al 32 4 1 Safety MeEASUeS i sia ie i e a e E a a a 32 4 2 General Instructions areira tnei aikas eee ees 32 4 3 Instructions on REDAN s i sare ai a oo 32 5 STORAGE scr a a 33 6 TRANSPORTATION soci ca A A ae eS 34 7 RECYCLING fo ia iia a di bad he he bd a aa AA 35 8 ACCEPTANCE C2. in paragraph 2 2 2 3 of the Regula 7505M OM Preparation demagnetization of the magnetic carrier as 19 described in paragraph 2 2 2 3 of the Regula 7505M OM e Magnetic copy execution WARNING THE DEMAGNETIZATION PROCESSES OF THE MAGNETIC CARRIER AND MAGNETOGRAPHING MUST BE COORDI NATED BY THE DIRECTION SEE FIG 10 OTHERWISE THE MAGNETIC RECORDING WILL BE WEAK AND IN CASE OF WEAK SIGNALS IT CAN NOT BE EXECUTED AT ALL In order to prevent errors of the direction coordination a visual noticeable tag should be placed on the magnetic tape surface e g as is shown in Fig 10 to make a start point by a felt tip pen at the beginning of the magnetic tape The magnetic carrier should be demagnetized as described in par agraph 2 2 2 3 of the Regula 7505M OM The demagnetizer must be moved from left to right relative to the start point see Fig 10a The demagnetized magnetic tape is placed on the investigated surface without overturns i e so that the start point is always at the left edge When carrying out magnetographing the demagnetizer is also moved from left to right relative to the start point see Fig 10b and the scanner body must be placed in the way that the relief tag Fig 4 pos 4 in the form of a cylindrical concavity is located under the thumb of a right hand i e behind it in the movement direction Magnetic copy e Put the magnetic tape on the prepared number area of a vehicle a
3. investigation of homogeneity of the surface composition of the device made of aluminum alloy The image of the object surface in the form of a magnalium plate of 1 mm thickness is shown in Fig 11a The plate contains such arti ficially formed relief elements and defects as 22 e Not specially marked through hole of 1 5 mm diameter holes of 0 4 1 2 mm diameter and 133 impressed digital stamp visible with the naked eye e Well noticeable visually parallel scratches pos 1 of 200 300um width e Hardly noticeable visually curved scratch pos 2 of 100 um width e Casually located insignificant superficial defects 3 in the form of small grey spots which correspond visually to indiscernible indents surface dirt and accumulations of extrinsic ferromagnetic inclusions which embedded in the sample surface as a result of its mechanical process The results of visual optical data analysis can not help to extract the accumulations of ferromagnetic inclusions from a number of insignificant superficial defects pos 3 All above mentioned relief elements including scratches pos 1 and pos 2 are clearly observed as a result of magnetog visualization of the given object Fig 11b and their contrast is higher than that of the optical image It attests sensitivity of magnetographing and visu alization devices to superficial defects such as scratches of 100 um width and resolution not less than 200 um Moreover visualization enabled to det
4. width well dis cernible with the naked eye However visual optical data do not help to establish the belonging of the scratches pos 2 to the paint film or the metal of the sample surface In the results of magnetog visualization ofthe given object Fig 13b the incomplete fusion pos 1 is observed at weld edges and their de tailing degree is higher that that of the optical image Obviously the curved scratches pos 2 belong to the paint film so long as they are absent in the results of the sample magnetog visualization 26 1 incomplete fusion at weld edges 2 surface scratches 3 overlap of electrode metal 4 paths of machining process Photo image a and magneto optical visualization results of the object magnetogram b made of aluminum alloy containing a trimmed joint weld on the device surface under the paint film layer of 100 um 27 Moreover visualization enabled to detect the overlap of electrode metal pos 3 and machining process paths pos 4 not observed visual optically through the paint film layer The ability to observe the structure and defects of joint welds in the objects of aluminum alloys is an important control feature as it enables to investigate e g the ways of VIN data change based on welding technologies The following example Fig 14 shows the probabilities of sensi tivity increase of magnetographing when investigating weak signals of residual stress in ferromagnetic material
5. ERTIFICATE 000 eee eee es 36 9 SALES CERTIFICATE sg raa ca ioe a ca aa Se ae Ae la Le a a ae 37 INTRODUCTION The present Operating Manual OM isthe main operational document for the eddy current magnetographing device hereinafter referred to as the device of magneto optical devices MODs Regula 7505M for identification and detection of falsification of vehicle units num bers and vehicles documents The OM contains the information on the device and its components design principle of operation and characteristics It also provides in structions on the correct and safe use of the device intended use technical maintenance simple routine repairs storage and transpor tation and on its technical condition evaluation when establishing the necessity to send the device for repairs e DESCRIPTION AND OPERATION 1 1 Device function The device of eddy current magnetographing is designed for car rying out investigations of the surface of the devices made of elec tro conductive materials and sensitivity increase of magnetographing process magnetic copying in the superficial layers of ferromagnetic devices The device is viewed as an add in module of the Regula 7505M intended for magneto optical visualization of VINs when car rying out forensic investigations The device use enables to investigate marking indications on the data carriers of aluminum alloys silumin bodies of the blocks of cylinders and reduce
6. M Compare results of the obtained magnetic copies stitch ing with the control images shown in Figure 8 and Fig ure 9 In case comparison results are positive the device operation is considered as normal Criteria of compar ing the results of the obtained magnetic copy stitching with control images for Al scanner are as follows compare the quality of processing of the alteration sings of the initial number digits the contours traces of the initial marking digits on the 2th and 6 digit po sition and fragments pressing in contours on the 4th digit position as well as the traces of machining proc ess on the 4t and 6 digit position shall be visible compare the quality of processing of the digits of the secondary number the contours of all digits shall be visible Criteria of comparing the results of the obtained mag netic copy stitching with control images for Fe scanner are as follows compare the quality of processing of the digits con tours of the remote initial number the contours out lines of all digits shall be visible in case of malfunction during any of the function con trol stages see paragraphs 3 and 4 Figures e 8 a surface image of the test object No1 b magneto optical visualization of magnetogram of the test object No1 Function control of the device with the use of Al scanner 1 6 Marking The device marking is executed in the form of a label on the back side of the d
7. ameter as a tension con centrator e Visually discernible curved scratches pos 2 of 100 200 um width e Hardly discernible with the naked eye crack nucleus pos 3 which appeared as a result of cyclical bending deforma tions of the sample All above mentioned relief elements including scratches pos 2 and crack nucleus pos 3 are clearly observed in the results of magnetog visualization of the given object Fig 12b and their contrast is higher that that of the optical image Moreover visualization enabled to detect the whole crack profile including its increase point pos 4 The ability to detect surface cracks is an important control feature so long as it enables to investigate e g microcracks on the surface of an aluminum carrier of VIN data which appear in consequence of its plastic deformations The following example Fig 13 shows the device abilities when investigating joint welds in aluminum and their defects The image of the object surface is shown in Fig 13 a The object is executed of aluminum alloy and has a trimmed joint weld The ob ject is made of 2 sheet magnalium fragments of 2 mm thickness con nected with a butt weld arc welding The weld surface is trimmed with a manual abrasive tool and covered with a paint film layer of 100 um You can also observe visual optically such artificially formed relief elements and defects as e Incomplete fusion pos 1 at weld edges e curved scratches pos 2 of 100 200 um
8. be carried out in conformity with rules adopted at the user s enterprise ACC and their charging unit require special utilization rules 35 ES ACCEPTANCE CERTIFICATE Eddy current magnetographing device Regula 7515 Serial number is produced and adopted as provided by the governmental stand ards technical documentaiton and is approved as ready for operation Responsible for acceptance Signature First and Last Name Seal YY MM DD 36 sales CERTIFICATE to be filled in by the Seller Eddy current magnetographing device Regula 7515 Serial number is sold to Buyer s Name Seal Date of sale DevicePrice Manufacturer REGULA Itd Address for mailing claims with regard to quality of the device 1 Voloha Street Minsk 220036 Republic of Belarus Phone 375 17 286 2825 Fax 375 17 210 2397 e mail mail regula by WEB http www regula by la forensic science systems 1 314 Voloha Street Minsk 220036 Republic of Belarus Phone 375 17 286 2825 Fax 375 17 210 2397 e mail mail regula by http www regula by
9. ch induces eddy currents in the electro conductive material of the object For magnetographing the scanner is transferred along the investigated surface on which the demagnet ized magnetic tape is preliminary fixed 10 scanning direction 4 1 Scanner body 2 Conductor of eddy currents Inductor 3 Clamping elements 4 Relief tag of scanning direction 5 Cable for connection to the controller f External view of Al scanner view of Al scanner In case of magnetographing of the relief surface the clamp ing elements pos 3 deform the conductor pos 2 in conformity with the current relief profile In the scanning process the slot of di electric clamping elements pos 3 functions as the conductor protec tion pos 2 from mechanical damage and dirt 11 12 scanning direction 1 Scanner body 2 Conductor of eddy currents Inductor 3 Clamping elements 4 Relief tag of scanning direction 5 Cable for the connection to the controller 6 Front polar tip of magnetization system 7 Back polar tip of magnetization system External view of Fe scanner External view of the device Fe scanner is given in Fig 5 The device Fe scanner pos 5 elements are similar in their design to those of Al scanner pos 1 5 see description of Fig 4 The special ty of the given type of the scanner is the magnetization system which includes the source of the continuous magnetic field not shown in the figure ma
10. duces eddy currents in the conductive material of the object The eddy currents trajectories and connected with them magnetic stray fields reflect the lines of electric resist ance specified by the form sizes and positioning of the defects in the investigated device The electro magnetic parameters of the scanner are selected so that the scanner transference rela tive to the investigated device creates a magnetog as a copy of a number of magnetic stray fields produced by eddy currents The obtained magnetogs of the object VIN stray fields are visual ized by Regula 7505M in conformity with its OM and the obtained images are processed and analyzed for the following expert appraisal AA Device Storage batteries Device Scanner Controller Charging Unit of Controller converter 220V 24V Stray field s record magnetogram Magneto optical device MOD Regula 7505M Object VIN Surface Structural scheme of the device as a part of MOD External view of the device controller with the basic controls of indication and commutation is shown in Fig 3 The device controller Fig 3 is designed in the form of a printed wiring plate and is located in the metal body pos 1 The controller side slab has a socket for the connection of scanner pos 2 and ACC charging device pos 6 and its bottom side slab has ACC cells pos 5 The power supply tumbler pos 3 and state indicators of the controller and ACC charge pos 4 are located o
11. ect by brightness and contrast the accumulations of ferromagnetic inclusions pos 4 from a number of insignificant superficial defects pos 3 The ability to detect superficial ferromagnetic inclusions is an important control feature so long as it enables to investigate e g the transfer of metal steel microparticles from matrix and punch to the face and back surface of an aluminum carrier of VIN data 23 ca z 1 scratches of 200 300 um width 2 scratch of 100 um width 3 insignificant superficial defects 4 accumulations of ferromagnetic inclusions Photo image a and magneto optical visualization results of the object magnetogram b The aluminum object has a superficial ferromagnetic inclusion 24 Another example Fig 12 shows the device abilities when investi gating discontinuity flaws such as surface cracks in aluminum 1 hole of 5 mm diameter 2 scratches of 100 200 um width 3 crack nucleus 4 point of crack increase Photo image a and magneto optical visualization results of the object magnetogram b The aluminum object has a surface crack 25 The image shown in Fig 12a of the object surface is in the form of a duraluminum plate of 4 mm thickness which contains such artifi cially formed relief elements and defects as e Through hole pos 1 of 5 mm di
12. equipment with apparent damages of pro tective isolation and conductors turn on the device when protective shrouds are removed The User should observe the following operating limitations of the device Consider climatic operational conditions as described in paragraph 1 1 1of the Regula 7505M OM The device should not be used under the rain out of doors or out of the passenger compartment In case water or con densate appear on the body of the device elements the device operation shall be stopped and can be renewed only after drying working operating conditions regarding mechanical influ ences are not specified The device should not be ex posed to impacts and strong vibration when operating and transporting observe quality norms for power supplies see paragraph 1 1 2 4 of the Regula 7505M OM all commutations of the device components connected with opening and closing of electric sockets shall be car ried out with deactivated power supply of the device Violation of operating limitations under paragraph 2 1 by the User leads to the loss of the manufactur er s warranty 18 Using limitations it is possible to investigate only electro conductive mate rials when the scanner type is chosen correctly it is not allowed to operate the device with damaged through break with sharp edges heavily crushed bent on edges and polluted magnetic tapes see paragraphs 2 2 2 2 and 3 2 2 of the Regula 7505M OM Failure t
13. esponding to repairs coating Test object No2 Fe Fig 7 is the imitator of Category A con trol object the data carrier of the vehicle body It is executed in the form of a plate made of a sheet of tool steel with the thick ness of 2mm bearing 29165 initial number applied by method of machining process of pressing cold pressing The initial number was made in the following way manual stamping with use of No 10 type markers kit and hammer on a massive anvil The depth of digits relief makes about 0 3 0 4 mm All digits of the initial number were removed by the way of re moving of the metal superficial layer of the test object to the depth of 0 5 mm The removal of the superficial layer from the initial marking is executed by the method of machining process of cutting milling and polishing As a result of the mentioned process of the test object sur face the initial marking is not observed by visual optical methods as the relief is removed However internal residual tension pro duced as a result of deformation of the metal when executing the initial marking is in the superficial layer of the test object metal 14 Photo image of the investigated surface of the test object No2 Fe Function control e Take out the test objects of the device and execute their magnetic copy as described in paragraph 2 3 Perform magnetic copy stitching in the PC as described in paragraph 2 2 1 3 of the Regula 7505M O
14. evice controller and provides information as follows e manufacturer s name or trade mark e symbolic notation of the device e manufacturer s serial number of the device e date of manufacturing year and month e rated voltage V o e e rated current A TC marking national mark of conformity certification Device sealing is made with the help of destructive labels applied on the device controller body Sealing violation deprives the User of warranty maintenance a surface image of the test object No2 A X HATEN b magneto optical visualization of magnetogram of the test object No2 Function control of the device with the use of Fe scanner Packing Packing the hardware of the device is carried out at regular ac commodation in a case and the SPCS Spare Parts and Components Set is in the bag for the SPC The device is transported and stored in a special packaging box wooden or cardboard of the delivery set 17 E intenpep use 2 1 Operating limitations IT IS STRONGLY PROHIBITED TO Disconnect the scanner socket if the indication of the controller power supply is present I e it is prohibited to disconnect the scanner if the power supply tumbler is activated as well as within 15 20 sec after its deactivation use other charging units of the ACC different from the stipulated ones use faulty network sockets and power supplies for ACC charge turn on the
15. gnetic conductors with polar tips pos 6 7 During Fe scanner operation the elements pos 1 5 function analo gously to Al scanner see description of Fig 4 The magnetization sys tem is used to excite the magnetic stray fields of the defects located in the sub superficial layers of the ferromagnetic device In the process of magnetic copying the polar tips of the magnetization system pos 6 7 must contact close the magnetic tape and the investigated surface Means of Measurement the Tool and Accessories The Regula 7505M magneto optical device TC Uk 33 2 14361144 001 2003 belongs to the category of displaying not measuring devices According to it means of function control of the Regula 7505M and the device as its component are executed as test objects simulating the widespread modified changes of vehicle VINs pouring by polymers pressing in fragments and removal of the metal superficial layer The control order of serviceability of the device with the use of test objects is described in detail in paragraph 2 1 3 of the Regula 7505M OM and 3 3 of the given OM Characteristics of the test object of the device Test object No1 Al Fig 6 is the imitator of Category A control object the data carrier of the vehicle body It is executed in the form of a plate made of a sheet of aluminum alloy with the thickness of 1mm bearing 29165 initial number applied by the method of machining process cold pressing The ini
16. he requirements of paragraph 2 1 1 4 2 General Instructions The present OM provides only one type of repairs delegated to the User replacement of the worked out resource of the ACC CE Instructions on Repair Replacement of ACC is carried out in case of significant decrease of batteries capacity which may happen after 500 charge cycles or as a result of violation of the their operation and storage conditions In case of ACC replacement only the analogous type of the storage battery GP17R8H is permissible 32 storace Device shall be stored in the manufacturer s package Climatic storing conditions air temperature range from 5 C to 40 C discharged ACC shall be stored at the temperature of approximately 5 C which enables to keep their characteristics for several years relative air humidity up to 80 at 15 C atmospheric pressure 100 4 KPa 750 30 mm When preparing the device for storage it is recommended to per form technical maintenance as described in paragraph 3 2 Devices can be stored in the manufacturer s package in stacks up to 10 items high 33 E TRANSPORTATION The device can be transported in the industrial package of the manufacturer provided in the delivery set Climatic stor age conditions stipulated in paragraph 5 shall be provided Protect the device from impacts and vibrations 34 EJ recyciine Recycling of the device shall
17. hyl alcohol consumption per working shift makes 5 g Technical maintenance of the device when preparing it for storage and in the storage mode e place and package all device components put into the transportation package e at least once per two months recharge ACC under the requirements of paragraph 3 1 Current technical maintenance of the device includes ACC re charge The device ACC require regular recharge to prevent their untimely failure Recharge periodicity depends on the indication state paragraph 1 4 but at least once in 2 months When charging ACC safety measures described in paragraph 2 1 shall be observed Charge order of the ACC e Connect the charging unit to the wall outlet alter nating current of 220 V 50 Hz If the indicators of the charging unit are activated there are voltage sup ply and contact in ACC sockets e Wait 8 hours till full charge Do not interrupt charging as it may lead to ACC capacity decrease e Disconnect the charging unit from the wall outlet e Carry out function control according to paragraph 2 2 30 Ee Safety measures Observe safety measures as described in paragraph 2 1 when per forming the device technical maintenance B Operational Serviceability Check For operational serviceability check see control function section of paragraph 2 2 31 Routine REPAIRS 4 1 Safety Measures When carrying out routine repairs safety measures correspond to t
18. ion only on flat and smooth surfaces Otherwise if the object surface is covered with deep scratches in consequence of the same high sensitivity level of magnetographing the signal of these scratch es will be amplified manyfold in the record and as a result it will cam ouflage a useful signal from internal stress 28 1 digits contours of the removed relief marking 2 supposedly surfaces of the metal shifts 3 defects trajectories on the tool nose Magneto optical visualization results of the magnetograms of the test objects of fer romagnetic alloy containing internal tension which emerged as a result of processing pressure a and processing 29 E TECHNICAL MAINTENANCE EE General instructions Everyday technical maintenance of the device provides for the operations as follows e external examination visually check the integrity of the controls indication and commutation as well as the integrity of isolation and the scanner cable conductors e control of ACC charge is carried out by trial activation depending on the state of the charge indications as de scribed in paragraph 1 4 If required indication of ACC discharge charge ACC in conformity with the require ments of paragraph 3 1 e cleaning of the front panel controls and scanner surfaces from dust and fatty films is to be carried out with a soft tissue paper scouring cloth or a wad wetted in the ethyl alcohol Approximate et
19. n the front panel of the controller body During the operation the device controller creates and sends volt age impulses with set parameters to the scanner These parameters correspond to the type of the connected scanner Moreover the con troller carries out self diagnostic controls ACC charge and provides its additional charge if the ACC charging device is connected 8 a the top view b the bottom view 1 Controller body 2 Connection socket of scanners 3 Power supply tumbler 4 State indicators of the controller and ACC charge 5 ACC cell 6 Connection socket of the network power unit External view of device controller When the scanner socket pos 2 is connected and power supply is activated by the device controller tumbler pos 3 the indicators pos 4 may have the following states e Only the green indicator glows controller state and ACC charge are normal e The green indicator glows and the red indicator blinks impulsively ACC charge is needed e The green indicator blinks impulsively showing failure in the controller prog This situation can occur as a result of the repeated activation without a temporal pause 15 20 sec from the time of previous deactiva tion as well as due to the scanner socket closing open ing when the controller power supply is activated You can restart of the controller when the power supply is deactivated and a temporal pause of 15 20 sec is made e Neither
20. nd fix its end on the investigated surface by a magnetic clamp adhesive tape or manually try to avoid skewness and shifts relative to the investigated number e Fix the same way if it is fixed firmly at the beginning it can be left loose the other end of the magnetic tape stripe The operator may choose any way of the magnetic tape fixation e For Fe scanner set the regulator of magnetization system of the device scanner Fig 4 pos 8 in its prior position in conformity with the recommendations of paragraph 1 4 e Place the body of the device scanner in the way that the relief tag Fig 4 pos 4 in the form of a cylindrical concavity is directed to the start point Fig 10b Put the scanner on the fixed stripe of the magnetic tape make sure they have a tight contact with the investigated surface and pass slightly pressing it down from begin 20 b magnetographing scanner movement from left to right Coordination of the processes of demagnetization and magnetographing by the direction ning to end of the investigated area It is recommended to use scanning rate not exceeding 50mm s as other wise the magnetic bias signal will be recorded on the tape in the form of vertical black white stripes In order to obtain a high quality copy the operator has to control tactually and visually its abutment to the investigated surface If the copying terms are violated magnetic tape 21 shift noncontac
21. o ob serve these requirements may result in discrepancies dur ing stitching and jamming of magnetic tapes in the MOD when using the device on the surfaces with nonflatness more than 0 1 mm on the basic area of 18x20mm or roughness more than Rz 80um the quality of the magnet ic copy is not guaranteed due to significant contact losses recharge ACC according to 3 1 at least once in 2 months 2 2 Preparation for use Activation order Choose the scanner corresponding to the type of the in vestigated material Fe scanner for ferromagnetic mate rials steel cast iron Al scanner for non ferromagnetic electro conductive materials nonferrous metals and their alloys Connect the chosen scanner Fig 1 pos 2 or pos 3 to the controller socket Fig 1 pos 1 Turn on the power supply tumbler of the device control ler Fig 3 pos 3 and make sure that ACC are charged enough according to the state of indicators Fig 3 pos 4 as described in paragraph 1 4 If it is necessary charge ACC under paragraph 3 1 Turn off the power supply tumbler of the device control ler Fig 3 pos 3 and carry out the operations necessary to start magnetographing under paragraph 2 3 Turn on the Regula 7505M in conformity with paragraph 2 2 of the Regula 7505M OM 2 3 Device use Device operation on execution of the object magnetic copy re quires the execution of the following operations Preparation of the investigated surface as described
22. of LED glows ACC are absent or are fully dis charged the device controller malfunction When the ACC charging device is connected to the controller de vice and its power supply is connected to the mains 220V the yel low indicator may glow The glowing means the presence of external power supply controller 24V at the input which provides an ad ditional charge of the ACC including the charge during the device operation process The access to ACC for their charge and replacement is carried out by loosening 4 screws and removing the trays cover pos 5 External view of AL scanner is given in Fig 4 The device Al scanner Fig 4 is designed in the form of a printed wiring plate and is located in the plastic body pos 1 The conduc tor of eddy currents Inductor pos 2 is placed in the slot of dielec tric clamping elements pos 3 which move free relative to the body pos 1 and are elements of the conductor tension system pos 2 Scanner s body pos 1 has a relief mark pos 4 in the form of the stylized arrow indicating the scanning direction The scanner is connected to the controller through the socket installed on the cable pos 5 During the operation the scanner by means of the cable pos 5 is connected to the device controller which forms and sends voltage impulses with set parameters to the scanner Pulse current which flows in the scanner conductor pos 2 creates around it the alter nating magnetic field whi
23. r 1 pos 2 Fe scanner 1 pos 3 ACC 2 not shown in the Figure Charging unit of ACC 1 pos 4 Test object No1 Al 1 pos 5 Test object No 2 Fe 1 pos 6 Device Operating Manual OM 1 not shown in the Figure mM Structure and Operation of the Device The device consists of 2 basic structural elements Fig 2 the controller and the scanner Scanners are specialized according to the type of the investigated material Thus there is Al scanner for electro conductive non ferromagnetic materials and Fe scanner for ferromagnetic materials in the device set Two ACC are the power supply source of the device controller These batteries are charged by a subsidiary charging unit Device function control is carried out in the composition of Regula 7505M using test objects No1 and No2 Magnetographing with the use of the device consists in the suc cessive execution of a number of operations The magnetic tape is demagnetized placed and fixed on the investigated surface before hand The scanner corresponding to the investigated material type is connected to the device controller The device controller power supply is activated and the scanner is moved along the investigated surface 6 External view of the device The device controller creates and sends the voltage impuls es with set parameters to the scanner Pulse current which flows in the scanner conductor creates around the scanner the alternat ing magnetic field which in
24. rs manufactory s aluminum plates duralu minium bodies and increase abilities of the Regula 7505M when in vestigating weak signals in the superficial layers of ferromagnetic devices e g residual accumulated tension 1 2 Technical characteristics Basic technical characteristics of the device surface peak value Scanner supply voltage 24 V Current in scanner conductor peak value 90 110A Magnetic field tension on the scanner conductor 30 35 kA m Nonflatness of investigated surface max 0 5 mm Scan rate max 50 mm s Effective width of copying max 20 mm Time of continuous work without recharge min 40 min 120 copies Type of Accumulator ACC batteries set of 2 GP17R8H nickel metal hybrid ACC 8 4V x 170mA per hour Charge time of ACC charge current max 24mA z8 hour Design life of the device min 5 years Design life of ACC min 500 charge cycles Overall dimensions of scanners 30x45x70 mm Controller overall dimensions 160x100x30 mm Overall dimensions of charging unit 100x80x30 mm Al scanner weight 160 g Fe scanner weight 2109 Controller weight 300 g Charging unit weight 150 g Climatic conditions of operation and storage are in conformity with the technical requirements of Regula 7505M 1 3 Device composition Device set composition Fig 1 Controller 1 pos 1 AL scanne
25. s Test objects with the investigation results shown in Fig 14 do not differ from test object No2 Fe by manufacturing technique but for the material In this case stronger Y7A tool steel was used I e the surface photo image of these test objects shown in Fig 7 and 9a is a polished surface with a completely removed relief of the initial marking cut with the superficial layer of the metal In the results of magnetog visualization of the test object Fig 14a but for digits contours pos 1 internal tension pos 2 is observed in the form of beams and arcs segments which radiate from the digit center they are especially notable around 6 digit Supposedly this tension emerged at the surfaces of the metal shifts when stamping deeply Magnetog visualization of the test object Fig 14b but for digits contours pos 1 shows internal tension pos 3 in the form of arcs segments of approximately the same curvature degree made from the center which moved along the horizontal axis Most likely this residual tension in the metal emerged along the defects trajecto ries on the tool nose when milling the test object material The ability to observe the structure and internal tension of the metal of ferromagnetic alloys is an important control feature so long as it enables to investigate e g VIN removed digits It should be noted that high sensitivity level of magneto graphing enables to control efficiently the metal internal ten s
26. t or scanner run off repeat all opera tions starting from the magnetic tape demagnetization e Take the magnetic tape with the copy off the investi gated object and disconnect the clamps When executing the given operation avoid the contact of the magnetic clamps and the scanner with the magnetic tape surface in the area of the magnetic copy execution Otherwise the magnetic copy can be partially demagnetized and unnecessary elements of magnetization spots or stripes unrelated to the investigated object may appear in it that can complicate the following investigations e Stitch the magnetogs in the USB device for magneto optical visualization of complex Regula 7505M e Put the magnetic copy into the corresponding compart ment of the magnetic tapes case the compartment for non investigated magnetic copies is red marked If it is necessary a comment can be applied on the mag netic copy with the use of a marker from the device set e If the operative investigation of the magnetic copy is impossible e g due to lack of the visualization de vice execute 1 2 safety magnetic copies more for Fe scanner when the positions of the regulating flywheel of the magnetization system of the device scanner Fig 5 pos 8 are different that minimizes operator s inaccuracy when executing magnetic copying Examples of efficient use of the device The result shown in Fig 11 can be considered as an example of the device efficient use for
27. tial number was made in the following way manual stamping with use of No 10 type mark ers kit and hammer on a massive anvil The depth of digits relief makes about 0 4 mm Three digits of the initial number were modified as follows 9 by 0 6 by 9 and 5 by 7 Thus the modified new number ap pears as 20197 the modified digits are underlined Digit 9 in the initial number was modified manually using cold calking of the element bulkhead of digit 9 with the help of a bench tool and then stamping of the new digit 0 over the re maining contour of digit 9 13 Digit 6 in the initial number was modified in the following way dismantling cutting out of the initial number fragment bearing digit 6 with the help of a blanking tool swap 180 rotation pressing in of the cut out fragment with digit 6 thus digit 6 is transformed into digit 9 Digit 5 in the initial number was modified manually using the process of pouring of the digit relief by polymer epoxy spack ling stamping of the new digit 7 over soft spackling E Photo image of the investigated surface of the test object Noi Al After the digits of the initial number were modified the following operations were executed on the test object scraping spackling priming two layer tinting with aerosol motor enamel using cold dry ing using technology corr
Download Pdf Manuals
Related Search