WO2008030300A1 - Tampographie de cibles vidéo pour une mesure de déformation - Google Patents

Tampographie de cibles vidéo pour une mesure de déformation Download PDF

Info

Publication number
WO2008030300A1
WO2008030300A1 PCT/US2007/016624 US2007016624W WO2008030300A1 WO 2008030300 A1 WO2008030300 A1 WO 2008030300A1 US 2007016624 W US2007016624 W US 2007016624W WO 2008030300 A1 WO2008030300 A1 WO 2008030300A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing
specimen
pads
pad
ink
Prior art date
Application number
PCT/US2007/016624
Other languages
English (en)
Inventor
Paulo A. Martin
Original Assignee
Illinois Tool Work Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/516,073 external-priority patent/US20080053319A1/en
Priority claimed from US11/516,074 external-priority patent/US20080053320A1/en
Application filed by Illinois Tool Work Inc. filed Critical Illinois Tool Work Inc.
Priority to JP2009527346A priority Critical patent/JP2010502486A/ja
Priority to DE112007001853T priority patent/DE112007001853T5/de
Publication of WO2008030300A1 publication Critical patent/WO2008030300A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • the present invention pertains to the use of a pad printer to place video targets on a sample for strain measurement by a video extensometer or similar device.
  • the generation of the video targets has been problematic.
  • Manual use of a marking pen to apply the video targets does not have uniform results.
  • the use of punched adhesive backed paper to supply the dots is problematic in that the dots may not adhere properly to round or other than flat specimens, may require a considerable application force which may damage certain specimens, may interfere with the test results of thin films in that the rigidity of the dots may artificially increase the rigidity of the sample, and may not adhere evenly to a specimen as it stretches thereby interfering with the strain measurement.
  • the dots may fly from the specimen during testing, particularly when the specimen breaks. Dots within the line of sight of the extensometer may cause erroneous test results. At a minimum, such errant dots may clutter the testing area.
  • a pad printing device for the application of video targets on specimens for strain testing. Additionally, such improvements are attained by providing pneumatic pistons on the pad supports to automatically change the spacing of the pads thereby changing the spacing of the video targets; by providing pad supports which change spacing between the ink pick-up and the ink application thereby providing different video target spacing for a single spacing of ink wells in the printing plate (i.e., clich ⁇ ) of the pad printer; by providing for automatic gauge length calculation; and by providing a snap-in magnetic configuration for securing the printing pads.
  • Figure 1 is a perspective view of a video extensometer performing stress/strain testing on a sample which includes video targets.
  • Figure 2 is a plan view of a typical testing specimen with video targets.
  • Figure 3 is a perspective view of a first embodiment of a pad printing device of the present invention.
  • Figure 4 is a perspective view of a second embodiment of a pad printing device of the present invention.
  • Figure 5 is a plan view of a cliche or printing plate for the pad printer of the present invention, showing typical spacing of the ink wells for the printing of video targets.
  • Figure 6 is a schematic of an example of a gauge length pattern of dots on the cliche of Figure 5, including typical dimensions.
  • Figure 7 is a schematic showing the pistons to change the spacing of the printing pads between the ink pick-up and the printing.
  • Figure 8 is a schematic of showing the apparatus for automatic proportional gauge length spacing of the video targets.
  • Figure 9 is an exploded perspective view, partially in phantom, of the magnetic support configuration for the printing pads.
  • Figure 1 illustrates a specimen 100 undergoing stress/strain analysis by a video extensometer 200, such as that disclosed in patent application serial number 10/683,072 entitled “Testing of Samples", filed on October 10, 2003 and patent application serial number 11/410,686 entitled “Testing of Samples”, filed on April 24, 2006.
  • Specimen 100 (shown in detail in Figure 2 and discussed below) is held between two sample holders or grips 202, 204 which typically exert a pulling force on the specimen to perform tensile testing.
  • the stress is calculated.
  • the measurement of this force and of the cross-sectional area, as well as the calculations, are straightforward.
  • the relative elongation of the portion of interest of the specimen must be measured.
  • Video targets 102, 104 are placed on the portion of interest of the specimen so that the video extensometer 200 can detect the relative deformation of the portion of interest of the specimen 100.
  • Specimen 100 is typically formed from a planar material of relatively uniform thickness. Specimen 100 includes two ends 106, 108 with increased width in order to be engaged firmly by sample holders or grips 202, 204. A central section 110 is formed between two ends 106, 108. Central section 110 typically includes a section with parallel edges and the least width of the specimen 100, so that relatively uniform stress can be applied to a given section of minimum cross section (and hence maximum stress). Video targets 102, 104 are typically placed on central section 1 10.
  • a first embodiment of a pad printer 10 for the printing of video targets 102, 104 is shown in Figure 3.
  • a ground engaging base 12 holds a locating device 14 for positioning specimen 100 for printing and further provides a support for cliche or printing plate 16.
  • Base 12 further engages support 18 which engages the proximal ends of rails 20, 22 and from which rails 20, 22 extend.
  • Stop 24 is formed at the distal ends of rails 20, 22.
  • Reciprocating head 30 includes vertical passageways 27, 29 through which vertical rails 31, 33 pass to provide for vertical movement of carrier plate 32. This vertical movement can be provided electromechanically or can be provided manually through handle 37 which engages vertical rails 31, 33 and pivots at a distal end of pivot extension 39 which extends from reciprocating head 30.
  • Reciprocating head 30 further supports ink cup shaft 35 for inverted ink cup 34.
  • Inverted ink cup 34 includes magnets to urge the ink cup 34 against the cliche or printing plate 16 and prevent leakage of the ink as the ink cup 34 is moved across the cliche or printing plate 16 by ink cup shaft 35. These magnets further eliminate the need for ink cup shaft 35 to provide a vertical pressing force to the inverted ink cup 34 as the ink cup 34 is moved across the cliche or printing plate 16.
  • Pad carriers 36, 38 are attached to the underside of carrier plate 32.
  • Printing pads 40, 42 are attached to pad carriers 36, 38. The central portions of printing pads 40, 42 are spaced apart by a distance equal to the desired distance between the- video targets. Printing pads 40, 42 are typically sufficiently soft to conform to any round or non-flat contours of the object receiving the printed pattern.
  • cliche or printing plate 16 includes a pattern of indentations 50 (see Figures 5 and 6). These indentations 50 collect ink from the inverted ink cup 34 as the inverted ink cup 34 is magnetically urged against the cliche or printing plate 16 during each printing cycle. More particularly, the reciprocating head 30 travels from the distal end of rails 20, 22 (the illustrated position in Figure 3) to the proximal end of rails 20, 22 thereby moving the inverted ink cup 34 away from the ink-filled indentations 50 and positioning printing pads 40, 42 for vertical movement thereby dipping into indentations 50 and drawing ink therefrom.
  • the reciprocating head 30 then travels back to the distal end of rails 20, 22 thereby moving the inverted ink cup 34 over indentations 50 in order to replenish the ink in indentations 50 and positioning printing pads 40, 42 for vertical movement thereby printing video targets 102, 104 onto specimen 100.
  • Figure 5 shows a typical pattern of indentations 50 on cliche or printing plate 16 for the printing of video targets 102, 104
  • Figure 6 gives the dimensions for various typical axial gauge length and transverse gauge length for the printing of video targets 102, 104.
  • Transverse gauge length video targets may be printed by a single printing pad in a central location on the pad printer 10.
  • Figure 4 shows a second embodiment of the pad printer 10, with similar elements and further including track 44 allowing for the adjustment of the position and spacing of pad carriers 36, 38 and hence printing pads 40, 42.
  • This allows for the automated changing of the spacing or separation of the printing pads 40, 42 by the use of pneumatics or motors and is shown in more detail in Figure 7.
  • Solenoid valve 50 in response to electronic input from line 52, activates pistons 54, 56 to move the positions of printing pads 40, 42, so that various gauge lengths can be achieved, including the illustrated Gl and G2 gauge lengths. Additionally, this configuration can be used to change the spacing of the printing pads 40, 42 between the ink pick-up and the printing steps.
  • the indentations 50 can be formed at a first gauge length and the printing pads 40, 42 are set to this gauge length during the ink pick-up step, and then the pistons 54, 56 can change the spacing of the printing pads 40, 42 to a second gauge length prior to the printing of the video targets 102, 104. This is particularly useful when gauge lengths are desired which are wider than the cliche 16 or the ink cup 34.
  • FIG. 8 A similar embodiment is disclosed in Figure 8 which allows automatic proportional gauge length testing that meets the requirements of metals testing per JIS Z 2201, ISO 6892 Annex D and others that require that the gauge length be proportional to the square root of the cross-sectional area of the specimen 100.
  • the value of cross-sectional area (A) can be determined using other instruments and methods known in the art and input to controller 70 through a keypad or similar device.
  • Controller 70 generates input to drive and control box 72 which controls motor 74.
  • Motor 74 drives screw shaft 76 which includes one half left hand threads and one half right hand threads.
  • Pad carriers 36, 38 are threadably mounted on screw shaft 76 whereby rotation of screw shaft 76 in a first direction causes pad carriers 36, 38, and hence pads 40, 42, to move toward each other (decreasing the spacing therebetween) and rotation of screw shaft 76 in a second direction causes pad carriers 36, 38, and hence pads 40, 42, to move away from each other (increasing the spacing therebetween).
  • Footswitch 80 or similar switch, is provided so that the user can initiate the desired operations.
  • Limit switch 82 is provided to prevent movement of pad carriers 36, 38 beyond the operating limits of this embodiment and further acts as a reference or home position for the pad mechanism.
  • Figure 9 discloses a configuration for the attachment of a printing pad 40 to a pad carrier 36 in such a way that the connection is sufficiently strong for the operation of pad printing, while still allowing for the simple and fast manual (“snap-in") installation or removal of the printing pad 40.
  • Printing pad 40 includes an upper metal plate 82 with a projecting male boss 84.
  • Pad carrier 36 includes a blind slot 86 of complementary size and shape to the projecting male boss 84. The position of the projecting male boss 84 and the blind slot 86 can be reversed.
  • Pad carrier 36 further includes magnets 87 to create a strong connection between the upper metal plate 82 and the pad carrier 36.
  • the user confirms that the appropriate cliche or printing plate 16 is installed and that the printing pads 40, 42 are properly spaced. Some embodiments require further programming or adjustment if the spacing of the printing pads 40, 42 will be adjusted between ink pick-up and printing.
  • the user places specimen 100 into adjustable locating device 14 and initiates the process so that video targets 102, 104 are printed on the specimen 100 in preparation for subsequent tensile or similar testing.

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne une tampographie de cibles vidéo sur un échantillon pour un essai de tension ou un test analogue par un extensomètre vidéo. L'imprimante tampographique peut comprendre divers perfectionnants tels que des pistons pneumatiques pour faire varier l'espacement de tampons; des supports de tampon qui font varier leur espacement entre une prise d'encre et une impression, permettant ainsi une plage d'impression pour un cliché donné ou une plaque d'impression; un calcul de longueur de jauge proportionnelle automatique; et une combinaison d'une bosse mécanique et d'une plaque magnétique pour fixer le tampon d'impression au support de tampon.
PCT/US2007/016624 2006-09-06 2007-07-25 Tampographie de cibles vidéo pour une mesure de déformation WO2008030300A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009527346A JP2010502486A (ja) 2006-09-06 2007-07-25 歪み測定用ビデオ標的のパッド印刷
DE112007001853T DE112007001853T5 (de) 2006-09-06 2007-07-25 Tampondruck von Videozielobjekten zur Dehnungsmessung

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/516,073 US20080053319A1 (en) 2006-09-06 2006-09-06 Pad printing of video targets for strain measurement
US11/516,074 2006-09-06
US11/516,074 US20080053320A1 (en) 2006-09-06 2006-09-06 Pad printing of video targets for strain measurement
US11/516,073 2006-09-06

Publications (1)

Publication Number Publication Date
WO2008030300A1 true WO2008030300A1 (fr) 2008-03-13

Family

ID=38921784

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/016624 WO2008030300A1 (fr) 2006-09-06 2007-07-25 Tampographie de cibles vidéo pour une mesure de déformation

Country Status (4)

Country Link
JP (1) JP2010502486A (fr)
DE (1) DE112007001853T5 (fr)
TW (1) TW200812811A (fr)
WO (1) WO2008030300A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029449A1 (fr) * 2008-09-09 2010-03-18 Itw Morlock Gmbh Machine d’impression au tampon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110253A (ja) * 1981-12-24 1983-06-30 Daiichi Jitsugyo Kk タンポプリンタの印刷方法及びタンポ取り付け装置
US5943957A (en) * 1998-03-12 1999-08-31 Nibco Inc. Method and device for in-mold pad printing
DE10051287A1 (de) * 2000-10-16 2002-04-25 Tampoflex Gmbh Tampondruckmaschine
FR2871100A1 (fr) * 2004-06-03 2005-12-09 Essilor Int Procede et dispositif de marquage d'une lentille ophtalmique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110253A (ja) * 1981-12-24 1983-06-30 Daiichi Jitsugyo Kk タンポプリンタの印刷方法及びタンポ取り付け装置
US5943957A (en) * 1998-03-12 1999-08-31 Nibco Inc. Method and device for in-mold pad printing
DE10051287A1 (de) * 2000-10-16 2002-04-25 Tampoflex Gmbh Tampondruckmaschine
FR2871100A1 (fr) * 2004-06-03 2005-12-09 Essilor Int Procede et dispositif de marquage d'une lentille ophtalmique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029449A1 (fr) * 2008-09-09 2010-03-18 Itw Morlock Gmbh Machine d’impression au tampon
US8904928B2 (en) 2008-09-09 2014-12-09 Itw Morlock Gmbh Pad printing machine

Also Published As

Publication number Publication date
TW200812811A (en) 2008-03-16
DE112007001853T5 (de) 2009-06-18
JP2010502486A (ja) 2010-01-28

Similar Documents

Publication Publication Date Title
CN101825542B (zh) 一种小载荷表面划痕测试装置
EP3076153B1 (fr) Procédé pour calculer une fonction de zone de pénétration et de quantification d'un écart à partir de la forme idéale d'un pénétrateur
US20080053319A1 (en) Pad printing of video targets for strain measurement
JP2015219092A (ja) スクラッチ試験機
US20080053320A1 (en) Pad printing of video targets for strain measurement
EP0605818A1 (fr) Méthode et appareil pour tester un circuit imprimé
US6591659B1 (en) Process for the determination of the friction properties of sheet metal during forming and the measuring apparatus for carrying out the process
RU2646442C1 (ru) Способ определения физико-механических характеристик модифицированного поверхностного слоя материала изделия и устройство для его осуществления
JPH06238343A (ja) 曲げ角度測定装置
WO2008030300A1 (fr) Tampographie de cibles vidéo pour une mesure de déformation
CN219201234U (zh) 一种可多角度调节的硬度计
US20230175913A1 (en) Calibration device for dynamometric tools
JPH08320284A (ja) 自動ロックウェル硬さ試験機
JP4417130B2 (ja) ガラス基板の垂直保持装置
CN218766559U (zh) 漆层拉拔附着力测试装置
CN111442995A (zh) 一种板料纯弯曲实验装置
JP4255901B2 (ja) レール試験装置
TW201443417A (zh) 一種保護膜或保護塗層的滑感測試設備及方法
CN211505078U (zh) 多样化的油墨摩擦检测结构
CN211085029U (zh) 一种通道电缆长度测量装置
US20110314925A1 (en) Deflection testing apparatus and method for using
JP2009293965A (ja) トラクション計測用試験装置
JP3855965B2 (ja) レバー式変位計測装置および材料試験機
JP4465690B2 (ja) 基板の垂直保持装置
FI112539B (fi) Laite nauhamaisen tai lankamaisen läpikulkevan materiaalin kovuuden määrittämiseksi

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07810722

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1120070018534

Country of ref document: DE

ENP Entry into the national phase

Ref document number: 2009527346

Country of ref document: JP

Kind code of ref document: A

RET De translation (de og part 6b)

Ref document number: 112007001853

Country of ref document: DE

Date of ref document: 20090618

Kind code of ref document: P

122 Ep: pct application non-entry in european phase

Ref document number: 07810722

Country of ref document: EP

Kind code of ref document: A1