CN201917492U - Displacement transfer device used for clamping extensometer - Google Patents
Displacement transfer device used for clamping extensometer Download PDFInfo
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- CN201917492U CN201917492U CN2011200103442U CN201120010344U CN201917492U CN 201917492 U CN201917492 U CN 201917492U CN 2011200103442 U CN2011200103442 U CN 2011200103442U CN 201120010344 U CN201120010344 U CN 201120010344U CN 201917492 U CN201917492 U CN 201917492U
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Abstract
The utility model relates to a displacement transfer device used for clamping an extensometer, which comprises a square-frame-shaped mounting block, a semi-square-frame-shaped mounting block, two loading plates, two long pins and two short pins. The square-frame-shaped mounting block and the semi-square-frame-shaped mounting block are combined and mounted by the aid of the two long pins and through holes, and the mounting blocks are fixed onto the upper loading plate and the lower loading plate by the aid of inner hexagon screws. The long pins are taken down, the two short pins are inserted and fixed into the corresponding through holes so as to complete positioning and mounting the displacement transfer device, and bayonets of the extensometer are fixed onto the two short pins. The two short pins of the displacement transfer device for clamping the extensometer are higher in coaxiality precision, errors between directions of axes of the two short pins and the direction of translation displacement of the loading plates are smaller, and accordingly consistency of the measurement displacement direction of the extensometer and the direction of the translation displacement between the loading plates is improved. In addition, the displacement transfer device effectively reduces mounting errors of the extensometer in a shearing performance test of a sandwich-structured core, and realizes accurate measurement of shearing deformation of the sandwich-structured core.
Description
Technical field
The utility model belongs to Experimental Mechanics and field of measuring technique, relates to a kind of displacement transfer device that is used for the extensometer clamping.
Background technology
In the sandwich construction core body testing shear performance, testpieces is by welding or be bonded and fixed in the middle of two load plate, utilizing testing machine that load plate is applied draws or compressive load, make testpieces produce detrusion, calculate the modulus of shearing of sandwich construction core body according to the translation displacement between load and the corresponding moment load plate.
For the precision that guarantees to measure, need select for use extensometer as survey instrument.But conventional extensometer is measured is displacement between two bayonet sockets of extensometer, can't directly measure the translation displacement between two load plate.Realize that extensometer measures the method for translation displacement between two load plate and be: with the displacement transfer device translation displacement conversion of two load plate is become displacement of the lines, and then measure with extensometer.In order to guarantee that displacement of the lines represents really the translation displacement between two load plate, require the translation sense of displacement of the direction of displacement of the lines and two load plate in full accord in theory.But be difficult to guarantee in the practice that both direction is in full accord,, guarantee the consistance of both direction so need control error in the installation process with technological means.
Existing open source literature " Experimental Investigation of Static and Fatigue Behavior ofHoneycomb Cores Under In-Plane Shear Loads " (50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference＜br〉17
Th4-7May2009, Palm Springs, California) in a shaped as frame piece is fixed on the load plate, and an other load plate is enclosed within the frame, stick with glue on shaped as frame piece and second load plate then and tie two L shaped fixed blocks, extensometer is clamped on the bolt on the L shaped fixed block.It is fixing that but L shaped fixed block sticks with glue knot in the document, and bonding can produce very big alignment error, and L shaped fixed block is to connect with thread forms with being connected of bolt simultaneously, and thread forms connects also can produce very big alignment error.The alignment error of accumulation causes the axis coaxle degree of two bolts on the L shaped fixed block relatively poor, and the translation sense of displacement error of the axis of bolt and load plate is also bigger, and above-mentioned two kinds of errors have had a strong impact on the measuring accuracy of testpieces detrusion.
The utility model content
The utility model provides a kind of displacement transfer device that is used for the extensometer clamping at existing the problems referred to above in the prior art, the coaxial accuracy of two short pins of the displacement transfer device of this extensometer clamping is higher, the axis direction of two short pins is less with the error of the translation sense of displacement of load plate, thereby has promoted the consistance of translation sense of displacement between the sense of displacement of extensometer measurement and the load plate.Reduce the alignment error of extensometer in the sandwich construction core body testing shear performance effectively, realized the accurate measurement of sandwich construction core body detrusion.
For solving the problems of the technologies described above, the technical solution of the utility model is: the displacement transfer device of extensometer clamping comprises: square frame shape mounting blocks, en shaped as frame mounting blocks, go up load plate, load plate, two are had strong market potential and two short pins down; Square frame shape mounting blocks and en shaped as frame mounting blocks are had strong market potential and the through hole aggregate erection by two, use socket head cap screw that square frame shape mounting blocks and en shaped as frame mounting blocks are fixed on load plate and the following load plate; Take off and have strong market potential, insert in corresponding through hole and fix two short pins, finish the location and installation of displacement transfer device, the bayonet socket of extensometer is fixed on two short pins.
Square frame shape mounting blocks of the present utility model is the framework of a complete closed, and interior width of frame is greater than installing the width of load plate within it, and the inside casing height is greater than the thickness of testpieces and upper and lower two load plate.Be provided with two through holes on the top of square frame shape mounting blocks, the distance between two through holes is 1/3 of a square frame shape mounting blocks width, and one of them through hole is in the centre position of square frame shape mounting blocks Width, through hole axially along the thickness direction of square frame shape mounting blocks.Be provided with two threaded holes at the top of square frame shape mounting blocks, two vertical communicating of through hole that two threaded holes and the top of square frame shape mounting blocks are provided with.Square frame shape mounting blocks two side lower parts are provided with two threaded holes, and in order to fixing load plate down, the axis direction of two threaded holes is along the Width of square frame shape mounting blocks, and threaded hole is a through hole.The interior following lower surface that props up down load plate with the face contact of square frame shape mounting blocks during location and installation.
Width of frame is provided with two threaded holes greater than the width of load plate within it is installed at the top of en shaped as frame mounting blocks in the en shaped as frame mounting blocks of the present utility model, two vertical communicating of through hole of two threaded holes and the top setting of en shaped as frame mounting blocks.Distance between two through holes is 1/3 of an en shaped as frame mounting blocks width, and one of them through hole is in the centre position of en shaped as frame mounting blocks Width.En shaped as frame mounting blocks two side lower parts are provided with two threaded holes, and in order to the fixing load plate that goes up, the axis direction of threaded hole is along the Width of en shaped as frame mounting blocks.The interior top upper surface that props up load plate with the face contact of en shaped as frame mounting blocks during location and installation.
Square frame shape mounting blocks of the present utility model and en shaped as frame mounting blocks are when location and installation, through hole facing each other is on same axis on the mounting blocks, the internal diameter of through hole with have strong market potential, the external diameter of short pin is identical, have strong market potential and two short pins are clearance fit with cooperating of through hole for two.
Installation process: at first with two have strong market potential penetrate square frame shape mounting blocks two logical
The holeIn, and then penetrate two of en shaped as frame mounting blocks logical
The holeIn, between while two mounting blocks
WidthGuarantee the installation of extensometer; Screw is tightened on prop up in the threaded hole at two mounting blocks tops and has strong market potential, guarantee to have strong market potential and in the hole, to slide; The assembly of testpieces and load plate is inserted in the frame of mounted device, following mode with the face contact in the square frame shape mounting blocks is propped up down the load plate lower surface, the interior top mode with the face contact of en shaped as frame mounting blocks props up the load plate upper surface; With screw square frame shape mounting blocks and en shaped as frame mounting blocks are fixed on two load plate, to guarantee that in the screw-driving process square frame shape mounting blocks medial surface is identical to the distance of load plate side with en shaped as frame mounting blocks medial surface, finishes the location and installation of displacement transfer device this moment; Unload the screw of fixedly having strong market potential, and take off and have strong market potential; In the square frame shape mounting blocks arbitrary group hole relative, insert short pin respectively, screw is screwed in screw hole fix short pin, finish the assembling of displacement transfer device, extensometer is clamped on two short pins with en shaped as frame mounting blocks.
Two of the utility model employings are had strong market potential and are fixed two positions between the mounting blocks, unload then and have strong market potential, in with pair of holes, insert short pin, guaranteed higher right alignment between the two short pins, in addition adopt two face contacts to realize location and installation, guaranteed two short pin shafts to the consistance of load plate translation sense of displacement, promoted the consistance of translation sense of displacement between sense of displacement that extensometer measures and the load plate.
The coaxial accuracy of two short pins of the displacement transfer device of the utility model extensometer clamping is higher, the axis direction of two short pins is less with the error of the translation sense of displacement of load plate, has promoted the consistance of translation sense of displacement between the sense of displacement of extensometer measurement and the load plate.Solve existing defective and deficiency in the prior art, reduced the alignment error of extensometer in the sandwich construction core body testing shear performance effectively, realized the accurate measurement of sandwich construction core body detrusion.
Description of drawings
Below in conjunction with drawings and embodiments a kind of displacement transfer device that is used for the extensometer clamping of the utility model is described in further detail.
Fig. 1 is the displacement transfer device structural representation of the utility model extensometer clamping.
Fig. 2 is a square frame shape mounting blocks synoptic diagram of the present utility model.
Fig. 3 is an en shaped as frame mounting blocks synoptic diagram of the present utility model.
Fig. 4 is testpieces and the load plate installing and locating synoptic diagram of the utility model before experiment.
Among the figure:
1. the interior top 12. en shaped as frame mounting blocks medial surfaces 13. of 3. times load plate of load plate, 4. square frame shape mounting blocks, 5. threaded holes, 6. weak point pins, 7. en shaped as frame mounting blocks, the 8. through holes interior following 11. en shaped as frame mounting blocks of 9. square frame shape mounting blocks medial surfaces, 10. square frame shape mounting blocks are had strong market potential on the testpieces 2.
Embodiment
Present embodiment is a kind of displacement transfer device that is used for the extensometer clamping.The displacement transfer device of this extensometer clamping comprises: go up load plate, down load plate, square frame shape mounting blocks, en shaped as frame mounting blocks, two have strong market potential, two short pins and screw.
Fig. 1, Fig. 4 have showed the displacement transfer device structure of the utility model extensometer clamping and testpieces and the load plate installing and locating synoptic diagram before the experiment.Use in the present embodiment to be gauge length be 50mm, the measurement range conventional axial extensometer as 10mm.At first two being had strong market potential 13 penetrates in two through holes 8 of square frame shape mounting blocks 4, and then it is logical to penetrate two of en shaped as frame mounting blocks 7
The holeIn, guarantee that simultaneously distance between two mounting blocks is at 65mm; Interior hexagonal cylinder screw is contained in the threaded hole 5 at two mounting blocks tops, props up and have strong market potential 13 and screw, guarantee to have strong market potential and 13 can not in through hole 8, slide; The assembly of testpieces 1, last load plate 2 and following load plate 3 is inserted in the frame of device, 10 modes with the face contact below in the square frame shape mounting blocks are propped up down the lower surface of load plate 3, in the en shaped as frame mounting blocks above 11 modes that contact with face prop up load plate 2 upper surfaces; With socket head cap screw square frame shape mounting blocks 4 and en shaped as frame mounting blocks 7 are fixed on two load plate, when tightening, socket head cap screw must guarantee that square frame shape mounting blocks medial surface 9 is identical to the distance of load plate side with en shaped as frame mounting blocks medial surface 12, be 1mm, finish the location and installation of displacement transfer device; Unload 13 the interior hexagonal cylinder screw of fixedly having strong market potential, take off and have strong market potential 13; In the relative arbitrary group of through hole 8 of square frame shape mounting blocks 4 and en shaped as frame mounting blocks 7, insert short pin 6 respectively, and live shortly to sell 6, finish the assembling of displacement transfer device with interior hexagonal cylinder screw retention; The bayonet socket of conventional axial extensometer is fixed on two short pins 6.
As shown in Figure 2, width of frame is than the big 2mm of width of load plate, the big 2mm of thickness of its inside casing aspect ratio testpieces and upper and lower two load plate in the square frame shape mounting blocks 4 of the present utility model.On the top of square frame shape mounting blocks 4 two through holes 8 are arranged, through hole 8 axially along the thickness direction of square frame shape mounting blocks 4, the distance between two through holes is 1/3 of a square frame shape mounting blocks width, one of them through hole is in the centre position of square frame shape mounting blocks 4 Widths.At the top of square frame shape mounting blocks 4 two threaded holes 5 are set, threaded hole 5 axially along the short transverse of square frame shape mounting blocks 4, its axis respectively with the intersect vertical axis of through hole 8, the screw thread hole depth is till the through hole.Be provided with two threaded holes 5 at the position, both sides of square frame shape mounting blocks 4, the axis direction of threaded hole is along the Width of square frame shape mounting blocks, and threaded hole is a through hole.
Referring to Fig. 3, en shaped as frame mounting blocks 7 its interior width of frame of the present utility model are than the big 2mm of width of load plate.Be provided with two through holes on the top of en shaped as frame mounting blocks 7, the axial thickness direction of through hole along en shaped as frame mounting blocks, distance between two through holes is 1/3 of an en shaped as frame mounting blocks width, and one of them through hole is in the centre position of en shaped as frame mounting blocks Width.Square frame shape mounting blocks 4 and en shaped as frame mounting blocks 7 are when location and installation is finished, and through hole relative separately on two mounting blocks is on same axis.Be provided with two threaded holes 5 at the top of en shaped as frame mounting blocks 7, threaded hole is axially along the short transverse of en shaped as frame mounting blocks 7, two vertical communicating of through hole that two threaded holes and the top of en shaped as frame mounting blocks are provided with.Be provided with two threaded holes at position, en shaped as frame mounting blocks 7 both sides, the axis direction of threaded hole is along the Width of en shaped as frame mounting blocks, and threaded hole is a through hole.
The square frame shape mounting blocks 4 of present embodiment and the nominal diameter of all threaded holes on the en shaped as frame mounting blocks 7 are 6mm.Have strong market potential 13 and short pin 6 external diameters be 10mm, the internal diameter of the through hole on square frame shape mounting blocks 4 and the en shaped as frame mounting blocks 7 is 10mm, has strong market potential 13, short pin 6 is clearance fit with cooperating of through hole 8.13 the length of having strong market potential is 120mm, and the length of short pin 6 is 60mm.
Linkage editor:
At first two being had strong market potential penetrates in two through holes of square frame shape mounting blocks 4, and then penetrates in two through holes of en shaped as frame mounting blocks 7, guarantees that simultaneously distance between two mounting blocks is at 65mm; Interior hexagonal cylinder screw is tightened on prop up in the threaded hole at two mounting blocks tops and has strong market potential 13, guarantee to have strong market potential and 13 can not in hole 8, slide; The assembly of testpieces 1, last load plate 2 and following load plate 3 is inserted in the frame of mounted device, 10 modes with the face contact below in the square frame shape mounting blocks are propped up down the lower surface of load plate 3, in the en shaped as frame mounting blocks above 11 modes that contact with face prop up load plate 2 upper surfaces; Use socket head cap screw that square frame shape mounting blocks 4 and en shaped as frame mounting blocks 7 are fixed on two load plate, guarantee in the socket head cap screw rundown process that square frame shape mounting blocks medial surface 9 is identical to the distance of load plate side with en shaped as frame mounting blocks medial surface 12, be 1mm, finish the location and installation of displacement transfer device this moment, as shown in Figure 4; Unload 13 the interior hexagonal cylinder screw of fixedly having strong market potential, and take off and have strong market potential 13, in the relative arbitrary group of through hole 8 of square frame shape mounting blocks 4 and en shaped as frame mounting blocks 7, insert short pin 6 respectively, live short pin 6 with interior hexagonal cylinder screw retention, finish the assembling of displacement transfer device, and the bayonet socket of conventional axial extensometer is fixed on two short pins 6.
Two of the utility model employings are had strong market potential and are fixed two positions between the mounting blocks, unload then and have strong market potential, in with pair of holes, insert short pin, guaranteed higher right alignment between the two short pins, in addition adopt two face contacts to realize location and installation, guaranteed two short pin shafts to the consistance of load plate translation sense of displacement, promoted the consistance of translation sense of displacement between sense of displacement that extensometer measures and the load plate.
Claims (4)
1. displacement transfer device that is used for the extensometer clamping is characterized in that comprising square frame shape mounting blocks, en shaped as frame mounting blocks, goes up load plate, load plate, two are had strong market potential and two short pins down; Square frame shape mounting blocks and en shaped as frame mounting blocks are had strong market potential and the through hole aggregate erection by two, use socket head cap screw that square frame shape mounting blocks and en shaped as frame mounting blocks are fixed on load plate and the following load plate; Take off and have strong market potential, insert in corresponding through hole and fix two short pins, finish the location and installation of displacement transfer device, the bayonet socket of extensometer is fixed on two short pins.
2. a kind of displacement transfer device that is used for the extensometer clamping according to claim 1, it is characterized in that: described square frame shape mounting blocks is the framework of a complete closed, be provided with two through holes on the top of square frame shape mounting blocks, distance between two through holes is 1/3 of a square frame shape mounting blocks width, one of them through hole is in the centre position of square frame shape mounting blocks Width, be provided with two threaded holes at the top of square frame shape mounting blocks, two threaded holes and two vertical communicating of through hole, square frame shape mounting blocks two side lower parts are provided with two threaded holes, in order to fixing load plate down, the interior following lower surface that props up down load plate with the face contact of square frame shape mounting blocks during location and installation.
3. a kind of displacement transfer device that is used for the extensometer clamping according to claim 1, it is characterized in that: the top of described en shaped as frame mounting blocks is provided with two threaded holes, two vertical communicating of through hole that two threaded holes and the top of en shaped as frame mounting blocks are provided with, distance between two through holes is 1/3 of an en shaped as frame mounting blocks width, one of them through hole is in the centre position of en shaped as frame mounting blocks Width, en shaped as frame mounting blocks two side lower parts are provided with two threaded holes, in order to the fixing load plate that goes up, the interior top upper surface that props up load plate with the face contact of en shaped as frame mounting blocks during location and installation.
4. a kind of displacement transfer device that is used for the extensometer clamping according to claim 1, it is characterized in that: described square frame shape mounting blocks and en shaped as frame mounting blocks are when location and installation, through hole facing each other is on same axis on the mounting blocks, the internal diameter of through hole with have strong market potential, the external diameter of short pin is identical, have strong market potential and two short pins are clearance fit with cooperating of through hole for two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200103442U CN201917492U (en) | 2011-01-13 | 2011-01-13 | Displacement transfer device used for clamping extensometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200103442U CN201917492U (en) | 2011-01-13 | 2011-01-13 | Displacement transfer device used for clamping extensometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201917492U true CN201917492U (en) | 2011-08-03 |
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ID=44417286
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200103442U Expired - Fee Related CN201917492U (en) | 2011-01-13 | 2011-01-13 | Displacement transfer device used for clamping extensometer |
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| CN (1) | CN201917492U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175522A (en) * | 2011-01-13 | 2011-09-07 | 西北工业大学 | Displacement transmitting device for clamping extensometer |
| CN104458446A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院工程热物理研究所 | Device and method for testing shearing characteristics of non-metallic materials |
-
2011
- 2011-01-13 CN CN2011200103442U patent/CN201917492U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175522A (en) * | 2011-01-13 | 2011-09-07 | 西北工业大学 | Displacement transmitting device for clamping extensometer |
| CN104458446A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院工程热物理研究所 | Device and method for testing shearing characteristics of non-metallic materials |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20130113 |