CN203881470U - Dynamic impact-force calibrating device - Google Patents
Dynamic impact-force calibrating device Download PDFInfo
- Publication number
- CN203881470U CN203881470U CN201320854273.3U CN201320854273U CN203881470U CN 203881470 U CN203881470 U CN 203881470U CN 201320854273 U CN201320854273 U CN 201320854273U CN 203881470 U CN203881470 U CN 203881470U
- Authority
- CN
- China
- Prior art keywords
- impact
- calibration device
- upper cover
- impact bar
- force
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- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a dynamic impact-force calibrating device which belongs to the technical field of force calibration. The device is mainly used for calibrating the strength of resistance to an impact force of equipment or calibrating the impact strength. An upper cover, an upper supporting cylinder, a cylindrical central part which is used for connecting the axis part of the upper and lower supporting cylinders and provided with a via hole, a lower supporting cylinder, and a pedestal, wherein the upper cover, the upper supporting cylinder, the cylindrical central part, the lower supporting cylinder and the pedestal are sequentially connected through threaded twisting, and the lower supporting cylinder and the pedestal form a main support. An impact rod and an impact-rod force applying piece in welding connection, and a special spring with the difference between the internal diameter of a special spring and the external diameter of the impact rod being within a range from 0.1 mm to 1 mm form an acting force part, and form the whole dynamic impact-force calibrating device through the combination of the central part and the via hole of the upper cover. The whole device is in an assembly structure, is simple in structure, and is convenient for maintenance and adjustment.
Description
Technical field
The utility model is under the jurisdiction of strength calibration technique field.
Background technology
At present, known strength is demarcated mode and is mainly adopted dead weight type safe method of testing, and main by using the large cover of counterweight little, plug-in, connecting, the technical schemes such as inversion realize.Along with scientific and technical development, also occurred that a large amount of high precision, digitized pressure transducer are in order to realize the Accurate Calibration to pressure.But in practice, dead weight type safe method of testing is mainly used in large pressure survey and its disadvantage adhesion phenomenon also always by being left in the basket consciously or unconsciously.Outside, for the measurement and calibration of dynamic impact forces, pay close attention to especially very micro-.
Summary of the invention
In order to realize dynamic impulsion force measurement and effectively to reduce and overcome existing adhesion phenomenon, the utility model design has realized a kind of dynamic impact forces calibration device, this equipment not only can calculate the size of dynamic impact forces comparatively accurately, and has effectively reduced adhesion phenomenon by equipment own characteristic.
The utility model solves the technical scheme that its technical matters adopts: first, the upper cover lower end of dynamic impact forces calibration device is connected with the upper end twisting of upper end barrel support, again the lower end of the center section of calibration device is connected with the upper end twisting of lower end barrel support, after the lower end of above two-part upper end barrel support is connected with the upper end twisting of calibration device center section, forms the integral supporting frame of measurement mechanism.Afterwards, the special spring that spring inside diameter and impact bar external diameter are differed at 0.1mm-1mm is inserted in support bar (being carved with corresponding scale value on bar wall), again this part bottom from calibration device integral supporting frame is passed through successively to barrel support inside, lower end, calibration device center section via hole, upper end barrel support inside, calibration device upper cover via hole, finally the lower end of lower end barrel support is connected with the twisting of calibration device base, forms whole complete dynamic impact forces calibration device.During use, first calibration device base is taken off in twisting, and the equipment that need to demarcate impulsive force size is fixed on calibration device base centre position by matching nut and stator, prevents the larger error by the displacement of calibration facility, demarcation being caused in calibration process.Afterwards, this part whole is connected with the twisting of lower end barrel support, twist be connected to relevant position (with the impact bar bottom of special spring with by calibration facility, contacted completely, but special spring is in the nature state that stretches).Afterwards, push down dynamic impact forces calibration device whole, by upwards lifting impact bar, cause special spring deformation, produce the regulated and controled dynamic impact forces of corresponding size, read after the variation of impact bar high scale value, by corresponding energy theorem, just the staking-out work of impulsive force can be calculated comparatively accurately, on the contrary, also same impulsive force can be repeatedly measured, the parameter such as computation of mean values, variance, completes the error analysis to this equipment.
The beneficial effects of the utility model are, complete comparatively accurately the demarcation of the dynamic impact forces of measured equipment, reusable, are convenient to adjust and safeguard, simple in structure.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Fig. 1 dynamic impact forces calibration device one-piece construction figure
Fig. 2 dynamic impact forces calibration device upper cover cut-open view
Fig. 3 dynamic impact forces calibration device center section cut-open view
Fig. 4 dynamic impact forces calibration device base cut-open view
Fig. 5 dynamic impact forces calibration device barrel support cut-open view
Fig. 6 dynamic impact forces calibration device upper cover top view
Fig. 7 dynamic impact forces calibration device center section vertical view
Fig. 8 dynamic impact forces calibration device base vertical view
Fig. 9-1 dynamic impact forces calibration device impact bar one-piece construction Fig. 1
Fig. 9-2 dynamic impact forces calibration device impact bar one-piece construction Fig. 2
The special spring figure of Figure 10
Figure 11-1 is fixing with additional device 1
Figure 11-2 are fixing with additional device 2
1. via holes (upper cover) in figure, 2. screw thread (upper cover), barrel support inside thread (on), barrel support inside thread (under), center section screw thread (on), 6. center section screw thread (under), 7. center section via hole, 8. base portion screw thread, 9. scale, 10. impact bar side view, 11. impact bar vertical views, 12. special springs (spring inside diameter and impact bar external diameter differ at 0.1mm-1mm), 13. embedded screws, 14. hold-down nuts, 15. stators, 16. impact bar application of force sheets, 17. intersections.
Embodiment
By dynamic impact forces calibration device upper cover, screw thread (upper cover) (2) and upside barrel support inside thread (on) (3) twisting is connected, again by dynamic impact forces calibration device center section, center section screw thread (under) (6) and downside barrel support inside thread (on) (3) twisting is connected, afterwards, the barrel support inside thread of front portion (under) (4) and latter part of center section screw thread (on) (5) twisting is connected, forms the holder part of whole calibration device.Then, special spring (12) (spring inside diameter and impact bar external diameter differ at 0.1mm-1mm) is inserted in impact bar (10), again this part integral body is passed successively to downside barrel support inside, center section via hole (7), upside barrel support inside, via hole (upper cover) (1), after EO, by base portion screw thread (8) and downside barrel support inside thread (under) (4) twisting is connected, twist and stop when causing special spring both sides just to touch calibration device center section lower end and impact bar application of force sheet (16) completely.Now, along the upper cover of calibration device and lower initial point 0 scale mark of the intersection of impact bar (17) mark, and to impact bar application of force sheet direction, extend mark with this, concrete scale (9) length is determined by actual service condition.
For relevant device carries out impulsive force timing signal, base is taken off in twisting, the stress surface adjustment of pre-calibration facility is placed on to base front surface home position, after determining position, select suitable stator (15) and hold-down nut (14), do not affecting under the prerequisite of proving operation, hold-down nut (14) is reversed and is fixed in embedded screw (13) suitable in calibration device base front surface, and twisting is fixed pre-calibration facility.Afterwards, by base portion screw thread (8) and downside barrel support inside thread (under) (4) twisting is connected, until the special spring (12) on impact bar (10) (spring inside diameter differs at 0.1mm-1mm with impact bar external diameter) effectively contacts calibration device center section lower end and 0 scale mark on impact bar application of force sheet (16) and impact bar (10) intersection (17) that just aligns again, can stop.Place whole calibration device, and effectively press calibration device with hand or other equipment, on carry impact bar (10) to certain altitude, and record, due to special spring generation deformation, unclamp rapidly after the impact bar of carrying, special spring recovers deformation and produces impulsive force, and pass through impact bar application of force sheet (16) useful effect in pre-calibration facility, complete corresponding demarcation (the computing formula explanation that specific formula for calculation applies to as follows).Change pick up height, complete the demarcation of different big or small impulsive forces, by repeating the mean variance etc. of sustained height test of many times experiment with computing data, effectively reduce experimental error.
The impact bar (10) that this dynamic impact forces calibration device is used, impact bar application of force sheet (16) are for same rigid material and by being welded to connect, and special spring (12) (spring inside diameter and impact bar external diameter differ at 0.1mm-1mm) is used spring shear modulus G (G
steel=8 * 10
4mPa, G
copper=4 * 10
4mPa) the corresponding impact bar of definite steel or copper product (10) is made, and the object of doing is like this, is equivalent to the collision of rigid body while doing impulse test, has effectively reduced adhesion phenomenon.Also can be according to the actual needs, at base upper surface, place the diameter round and elastic pad (eva foam, rubber, silica gel, felt) identical or smaller with barrel support internal diameter and be used in the action time on pre-calibration facility to change uniform impingement masterpiece, reach certain emulation demarcation effect.
Impact bar (10), impact bar application of force sheet (16), special spring (12) (spring inside diameter and impact bar external diameter differ at 0.1mm-1mm), integral body is measured by high-precision electronic level ground, gross mass is m, and by vernier caliper, recorded the wire diameter d of special spring (12) (spring inside diameter and impact bar external diameter differ at 0.1mm-1mm), outer diameter D
2number of active coils n with spring.The upper cover of calibration device, center section, the equal service property (quality) of base are light, solid the manufacturing of aluminum alloy materials of good rigidly, the inwall of via hole (1), (7) all needs through mending the special process processing of glue, corase grind, fine grinding, water mill surplus, effectively reduce frictional resistance and in order to reduce rocking of impact bar (10), on demarcating the impact causing, via hole (1), (7) internal diameter and impact bar external diameter differ should be as far as possible little, in 0.2mm.Barrel support is made by high-intensity hyalomitome polythene material.
Dynamic impact forces calibration device parameter is determined, the computing formula applying to and theorem:
(1) spring index:
(2) the elastic coefficient:
(3) gravity acting: W
gravity=-(mgZ
end-mgZ
just)
(4) elastic force acting:
(5) momentum: I=F
closet
(6) momentum: P=mv
(7) kinetic energy:
(8) theorem of momentum: F
closet=mv '-mv (t is effective action time of impulsive force)
(9) theorem of kinetic energy:
(10) law of conservation of mechanical energy: mechanical energy=kinetic energy+gravitional force+elastic potential energy
(11)1MPa＝1×10
6N/m
2
(12) Z
end-Z
just=-h
By each above formula and theorem, can be calculated:
(Rigid Body Collision situation).
Claims (3)
1. dynamic impact forces calibration device, by screw thread, twist and connect upper cover, upper support bucket, the cylindric center section that has via hole for connecting the axial portions of upper and lower barrel support, lower support bucket and base formation main body rack successively, it is characterized in that: the impact bar being welded to connect and impact bar application of force sheet and spring inside diameter and impact bar external diameter differ the special spring assembly at 0.1mm-1mm, form acting force part, and synthesize whole dynamic impact forces calibration device by the groups of vias of center section and upper cover.
2. dynamic impact forces calibration device according to claim 1, it is characterized in that: upper cover, center section, base all adopts rigid material to make, barrel support partly adopts hyaloplasmic material manufacture so that observe calibration device inner case, impact bar and impact bar application of force sheet are also used rigid material to effectively reduce adhesion phenomenon, spring inside diameter and impact bar external diameter differ at the special spring of 0.1mm-1mm must specially select making, the via hole of upper cover and center section need be through mending glue, corase grind, fine grinding, the special process processing of water mill surplus, the error causing to effectively reduce frictional resistance.
3. dynamic impact forces calibration device according to claim 1, is characterized in that: base connects by twisting, by adjusting height to add pre-demarcating module, or adds according to actual needs elastomeric pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320854273.3U CN203881470U (en) | 2013-12-13 | 2013-12-13 | Dynamic impact-force calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320854273.3U CN203881470U (en) | 2013-12-13 | 2013-12-13 | Dynamic impact-force calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881470U true CN203881470U (en) | 2014-10-15 |
Family
ID=51681957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320854273.3U Expired - Fee Related CN203881470U (en) | 2013-12-13 | 2013-12-13 | Dynamic impact-force calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881470U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527079A (en) * | 2015-12-03 | 2016-04-27 | 北京机械设备研究所 | Dynamic calibration method for springs |
| CN106768620A (en) * | 2017-01-10 | 2017-05-31 | 成都体育学院 | Dynamic impact forces calibration device |
| CN109443636A (en) * | 2018-11-13 | 2019-03-08 | 浙江大学 | A kind of dynamic response evaluating apparatus of strain-type pressure testing system |
-
2013
- 2013-12-13 CN CN201320854273.3U patent/CN203881470U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527079A (en) * | 2015-12-03 | 2016-04-27 | 北京机械设备研究所 | Dynamic calibration method for springs |
| CN106768620A (en) * | 2017-01-10 | 2017-05-31 | 成都体育学院 | Dynamic impact forces calibration device |
| CN109443636A (en) * | 2018-11-13 | 2019-03-08 | 浙江大学 | A kind of dynamic response evaluating apparatus of strain-type pressure testing system |
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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 |
Granted publication date: 20141015 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |