CN210374960U - Detection apparatus for tensile test machine chuck axiality - Google Patents
Detection apparatus for tensile test machine chuck axiality Download PDFInfo
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- CN210374960U CN210374960U CN201921600817.7U CN201921600817U CN210374960U CN 210374960 U CN210374960 U CN 210374960U CN 201921600817 U CN201921600817 U CN 201921600817U CN 210374960 U CN210374960 U CN 210374960U
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- chuck
- mandrel
- fixed
- coaxiality
- testing machine
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- 238000009864 tensile test Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title claims description 15
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Abstract
A device for detecting coaxiality of chucks of a tensile testing machine comprises a lower chuck and an upper chuck moving relative to the lower chuck, wherein an upper mandrel is fixed on the upper chuck, a lower mandrel is fixed on the lower chuck, a spring shaft clamping sleeve is arranged at the lower part of the upper mandrel, a rotating mandrel sleeve is concentrically sleeved on the upper mandrel and limited by the spring shaft clamping sleeve, the rotating mandrel sleeve is provided with an ear part extending horizontally outwards, a vertical rod vertically penetrates through the ear part and is locked by a first set screw, and an indicating meter is fixed at the lower part of the vertical rod through a second screw; after the height position of the upper chuck is fixed, an upper mandrel is fixed on the upper chuck, a lower mandrel is fixed on the lower chuck, the indicator meter keeps horizontal and is initially contacted with the lower mandrel, and the indicator meter is observed by slowly rotating the rotating mandrel sleeve for one circle to observe the variation of the indicator, so that the coaxial measurement value of the upper chuck and the lower chuck can be judged; the device is convenient and visual to detect and low in cost.
Description
Technical Field
The utility model relates to a detection apparatus for tensile testing machine chuck axiality.
Background
The tension tester is a mechanical stress tester for testing mechanical properties of various materials such as static load, tension, compression, bending, shearing, tearing, peeling of instruments and equipment, is suitable for testing various physical and mechanical properties of materials such as plastic plates, pipes, profiled bars, plastic films, rubber, electric wires, cables, steel, glass fiber and the like, is material development, is indispensable use detection equipment for physical property test, teaching research, quality control and the like, and has great influence on the result of the tension test of the materials due to the coaxiality of an upper chuck and a lower chuck during the actual use process, so the coaxiality of the upper chuck and the lower chuck is generally required to be detected before the tension test of the materials is carried out, the existing detection method is to clamp a standard mandrel on the upper chuck and the lower chuck, and detect the displacement generated at the upper part and the lower part of the standard mandrel after clamping through a displacement sensor, therefore, whether the upper chuck and the lower chuck are coaxial or not is determined, in the tensile testing machine, the lower chuck is fixed, the upper chuck is lifted on the cross beam, so that standard mandrels with different lengths need to be equipped, and meanwhile, when the offset of the upper chuck and the lower chuck is large, the standard mandrels are easily subjected to plastic deformation in the detection process, the standard mandrels are damaged, and meanwhile, the displacement sensor belongs to precision instrument equipment, and the whole device is expensive.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned problem, the utility model provides a detection device of tensile test machine chuck axiality.
In order to achieve the purpose, the utility model provides a detection device for chuck coaxiality of a tensile testing machine, which comprises a lower chuck and an upper chuck moving relative to the lower chuck, wherein an upper mandrel is fixed on the upper chuck, a lower mandrel is fixed on the lower chuck, a spring shaft clamping sleeve is arranged at the lower part of the upper mandrel, a rotating mandrel sleeve is concentrically sleeved on the upper mandrel and limited by the spring shaft clamping sleeve, the rotating mandrel sleeve is provided with an ear part extending horizontally outwards, a vertical rod vertically penetrates through the ear part and is locked by a first fastening screw, and an indicating meter is fixed at the lower part of the vertical rod through a second screw;
after the height position of the upper chuck is fixed, the upper mandrel is fixed on the upper chuck, the lower mandrel is fixed on the lower chuck, the indicating gauge keeps horizontal and is initially contacted with the lower mandrel, and the indicator of the indicating gauge is observed by slowly rotating the rotating mandrel sleeve for one circle to change, so that the coaxial measurement value of the upper chuck and the lower chuck can be judged.
Preferably, the structure of the upper chuck is consistent with that of the lower chuck, the lower chuck is fixed on a workbench, a horizontal top plate is arranged above the workbench, the workbench is fixedly connected with the top plate through an upright post, a screw rod is arranged between the workbench and the top plate, a cross beam is in transmission connection with the screw rod and guided by the upright post, and the upper chuck is fixed on the cross beam;
in the technical scheme, the cross beam is driven to move along the vertical direction through the screw rod, and the upper chuck moves along with the cross beam.
Preferably, the screw rod is positioned on the inner side of the upright post and comprises a left screw rod and a right screw rod, and the left screw rod is externally connected with a power motor and is in transmission connection with the right screw rod through a belt pulley;
in the technical scheme, the power motor drives the left screw rod and the right screw rod to synchronously rotate, and the cross beam stably realizes the lifting motion on the vertical line.
Preferably, a load cell is arranged between the upper chuck and the cross beam;
in the technical scheme, the force measuring sensor is a stressed sensor when the device is used for tensile test, so that the stress between the upper chuck and the lower chuck is directly displayed on the display.
Preferably, a base is fixedly connected below the workbench, the base is supported by a support column, the height of the support column is adjustable, and a bubble type level gauge is installed on the table top of the workbench;
in the technical scheme, the height of the support column is adjusted to enable the bubbles of the bubble level gauge to run to the middle position, namely the level of the workbench is adjusted.
Preferably, the bottom of the pillar is coated with a rubber bottom pad;
in the technical scheme, the rubber bottom pad avoids the direct contact between the support and the ground, and reduces the abrasion.
Preferably, the indicator is a dial indicator, the dial of the indicator faces outwards, and the measuring rod of the indicator is horizontal;
in the above technical solution, a dial indicator is preferably used, because the dial indicator has higher precision, and actually, a dial indicator can also achieve a certain degree of detection.
The utility model discloses beneficial effect for prior art does: the utility model discloses divide into the upper spindle of disconnection, lower spindle with the standard mandrel, because both are discontinuous, can not cause the damage condemned because of plastic deformation during the use, through the direct observation of indicateing table moreover, visual, saved displacement sensor's configuration, detection device's cost reduces by a wide margin.
Drawings
Fig. 1 is a front view of the device for detecting the coaxiality of the chuck of the tensile testing machine of the present invention;
FIG. 2 is an enlarged view of the upper and lower jaws of FIG. 1;
fig. 3 is a cross-sectional view taken at a-a in fig. 2.
In the figure: 1. a top plate; 2. a screw rod; 3. a column; 4. a cross beam; 5. a force sensor; 6. an upper chuck; 7. an upper mandrel; 8. rotating the spindle sleeve; 81. an ear portion; 9. a first set screw; 10. a spring shaft clamping sleeve; 11. a vertical rod; 12. an indication table; 13. a second set screw; 14. a lower mandrel; 15. a lower clamp; 16. a work table; 17. a belt pulley; 18. a power motor; 19. a base; 20. and a support pillar.
Detailed Description
As shown in fig. 1, fig. 2 and fig. 3, the device for detecting the coaxiality of the collet of the tensile testing machine according to the embodiment of the present invention includes a lower collet 15 and an upper collet 6 moving relative to the lower collet 15, wherein the upper collet 6 is fixed with an upper mandrel 7, the lower collet 15 is fixed with a lower mandrel 14, the lower portion of the upper mandrel 7 is provided with a spring shaft sleeve 10, a rotary mandrel sleeve 8 is concentrically sleeved on the upper mandrel 7 and is limited by the spring shaft sleeve 10, the rotary mandrel sleeve 8 is provided with an ear portion 81 extending horizontally outwards, a vertical rod 11 vertically penetrates the ear portion 81 and is locked by a first set screw 9, and the lower portion of the vertical rod 11 fixes an indicator 12 through a second screw 13; the structure of the upper chuck 6 is consistent with that of the lower chuck 15, the lower chuck 15 is fixed on a workbench 16, a horizontal top plate 1 is arranged above the workbench 16, the workbench 16 is fixedly connected with the top plate 1 through an upright post 3, a screw rod 2 is arranged between the workbench 16 and the top plate 1, a cross beam 4 is in transmission connection with the screw rod 2 and is guided by the upright post 3, the upper chuck 6 is fixed on the cross beam 4 through a force measuring sensor 5, the screw rod 2 is positioned at the inner side of the upright post 3 and comprises a left screw rod and a right screw rod, and the left screw rod is externally connected with a power motor 18 and is in transmission connection with the right screw rod; a base 19 fixedly connected with the lower part of the workbench 16 is arranged, the base 19 is supported by a support column 20, the height of the support column 20 is adjustable, a bubble type level gauge is arranged on the table top of the workbench 16, and the bottom of the support column 20 is coated with a rubber bottom pad; the indicating gauge 12 is a dial gauge, the dial of the indicating gauge 12 faces outward, and the measuring rod 121 of the indicating gauge 12 is horizontal.
After the height position of the upper chuck is fixed, an upper mandrel is fixed on the upper chuck, a lower mandrel is fixed on the lower chuck, the indicator meter keeps horizontal and is initially contacted with the lower mandrel, and the indicator meter is observed by slowly rotating the rotating mandrel sleeve for one circle to observe the variation of the indicator, so that the coaxial measurement value of the upper chuck and the lower chuck can be judged; the utility model discloses divide into the upper spindle of disconnection, lower spindle with the standard mandrel, because both are discontinuous, can not cause the damage condemned because of plastic deformation during the use, through the direct observation of indicateing table moreover, visual, saved displacement sensor's configuration, detection device's cost reduces by a wide margin.
When in specific use, the utility model is described with the attached drawings for the convenience of understanding;
the adjusting process comprises the following steps: the height of the pillar 20 of the base 19 is adjusted to enable the table top of the workbench 16 to be horizontal (observed through a bubble level gauge), the power motor drives the screw rod to rotate, the cross beam is enabled to move up and down under the guiding action of the upright column, and the distance between the upper chuck and the lower chuck is the length of the material selected by the material to be detected in the tensile test;
and (3) detection process: the upper mandrel is fixed on the upper chuck, the lower mandrel is fixed on the lower chuck, when the vertical rod passes through the ear part of the rotating mandrel sleeve, the vertical rod is fixed through a first set screw and is kept vertical, the indicating gauge is fixed at the bottom of the vertical rod through a second set screw, the indicating gauge is preferably a dial gauge, a measuring rod of the indicating gauge is in contact with the wall surface of the lower mandrel, then the rotating mandrel sleeve is slowly rotated, the indicating gauge rotates in the circumferential direction with the upper mandrel as the center, if the lower mandrel and the upper mandrel are coaxial, a pointer of the indicating gauge does not deflect, if the lower mandrel and the upper mandrel are not coaxial, the measuring rod of the indicating gauge is inevitably stressed in a circle to deflect the pointer, and the deflection can be directly observed by a detector;
in this embodiment, the device is used for the detection of a vertical tensile testing machine, and the device can also be used for the detection of a horizontal tensile testing machine.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a detection apparatus of tensile test machine chuck axiality, includes lower chuck (15) and for last chuck (6) of lower chuck (15) motion, its characterized in that: go up chuck (6) and go up and be fixed with last mandrel (7), be fixed with down mandrel (14) down on chuck (15), it is equipped with a spring shaft cutting ferrule (10) to go up mandrel (7) lower part, and rotatory axle sleeve (8) cover is established with one heart go up mandrel (7) and by spring shaft cutting ferrule (10) are spacing, rotatory axle sleeve (8) have one level toward ear (81) of extending outward, montant (11) are in ear (81) position department passes perpendicularly and is locked by first holding screw (9), montant (11) lower part is through second screw (13) fixed instruction table (12).
2. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 1, is characterized in that: go up chuck (6) with the structure of chuck (15) is unanimous down, chuck (15) are fixed on workstation (16) down, workstation (16) top is a horizontally roof (1), workstation (16) with roof (1) passes through stand (3) fixed connection, workstation (16) with lead screw (2) are installed in addition between roof (1), crossbeam (4) with lead screw (2) transmission is connected and by stand (3) direction, it fixes to go up chuck (6) on crossbeam (4).
3. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 2, is characterized in that: the screw rod (2) is located on the inner side of the upright post (3) and comprises a left screw rod and a right screw rod, wherein the left screw rod is externally connected with a power motor (18) and is in transmission connection with the right screw rod through a belt pulley (17).
4. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 2 or 3, wherein the device comprises: and a force measuring sensor (5) is arranged between the upper chuck (6) and the cross beam (4).
5. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 2 or 3, wherein the device comprises: workstation (16) below is fixed connection's base (19), base (19) are supported by pillar (20), the height-adjustable of pillar (20), install bubble type spirit level on the mesa of workstation (16).
6. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 5, is characterized in that: the bottom of the supporting column (20) is coated with a rubber bottom pad.
7. The device for detecting the coaxiality of the chuck of the tensile testing machine according to claim 1, is characterized in that: the indicating gauge (12) is a dial indicator, the dial plate of the indicating gauge (12) faces outwards, and the measuring rod (121) of the indicating gauge (12) is horizontal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921600817.7U CN210374960U (en) | 2019-09-25 | 2019-09-25 | Detection apparatus for tensile test machine chuck axiality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921600817.7U CN210374960U (en) | 2019-09-25 | 2019-09-25 | Detection apparatus for tensile test machine chuck axiality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210374960U true CN210374960U (en) | 2020-04-21 |
Family
ID=70255416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921600817.7U Expired - Fee Related CN210374960U (en) | 2019-09-25 | 2019-09-25 | Detection apparatus for tensile test machine chuck axiality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210374960U (en) |
-
2019
- 2019-09-25 CN CN201921600817.7U patent/CN210374960U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |