CN213481669U - Impact test capability verification device based on maximum impact response peak acceleration - Google Patents
Impact test capability verification device based on maximum impact response peak acceleration Download PDFInfo
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- CN213481669U CN213481669U CN202021900656.6U CN202021900656U CN213481669U CN 213481669 U CN213481669 U CN 213481669U CN 202021900656 U CN202021900656 U CN 202021900656U CN 213481669 U CN213481669 U CN 213481669U
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Abstract
The utility model discloses an impact test capability verification device based on maximum impact response peak acceleration, which comprises a base, a support plate, a suspension rod and a balance weight, wherein the base is provided with a mounting hole for being connected with a table-board of an impact tester, the support plate is vertically arranged on the upper surface of the base, the suspension rod is vertically fixed on the surface of the support plate to form a cantilever, and the other end of the cantilever is connected with the balance weight; the capability verification means outputs only one shock response peak when in use. The utility model discloses the device is verified to impact test ability only is equipped with single polished rod, can avoid the inherent frequency of each degree of freedom weight to influence each other in the device is verified to the ability that the structure is complicated to cause the influence to the biggest impulse response peak acceleration of device output, be favorable to improving the accuracy of test result.
Description
Technical Field
The utility model relates to a technical field is verified to the ability, concretely relates to impact test ability verification device based on maximum shock response peak acceleration.
Background
Capability verification is an activity that uses inter-laboratory alignments to determine the calibration, detection capability of a laboratory or the detection capability of an inspection facility. Competency verification activities refer to any inter-laboratory alignment and measurement audit used to evaluate laboratory competency. Such as activities performed by a national or regional approval agency or cooperative organization thereof, a government or industry organization, or other provider of a formal capacity verification plan.
The development of capability verification activities has a positive effect on relevant aspects related to detection or calibration, and for laboratories, the requirements for meeting the ISO/IEC 17025 standard, internal quality control and external capability certification are met; for the accreditation institution, is an important technical approach to evaluate the accreditation laboratory testing or calibration capability; for the clients of the laboratory, the method is an important basis for proving that the laboratory has certain detection capability; for government authorities, the method is an effective measure for monitoring the laboratory capacity and level; therefore, at present, the ability verification activities are receiving wide attention both internationally and domestically.
Impact testing is carried out by simulating various non-repeated/repeated mechanical impacts encountered in the whole life cycle of a product to evaluate the impact bearing capacity of the structure and the function of the product. The impact test is to apply mechanical impact impulse force to a product in a relatively short time, after the product is impacted, the motion state of a mechanical system of the product is subjected to sudden change, transient impact response is generated, and the size of the generated impact response indicates the actual impact strength of the product. Therefore, the maximum peak acceleration of the shock response is directly related to the damage and failure cause of the product caused by the shock. At present, impact test capability verification is not developed at home, and the difficulties in the aspects of capability verification method selection, capability verification device design and the like are overcome.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an impact test ability verifying attachment based on maximum shock response peak acceleration.
The invention purpose of the utility model is realized by the following technical scheme: a capability verification device based on maximum impact response peak acceleration comprises a base, a supporting plate, a suspension rod and a balance weight, wherein a mounting hole used for being connected with a table board of an impact testing machine is formed in the base; the capability verification means outputs only one shock response peak when in use.
The shock response peak value quantity is comparatively relevant with the mounting means of structure, size, cantilever and the backup pad of cantilever, and the accessible makes the device only export a shock response peak value to the regulation of above-mentioned parameter, thereby makes and passes through the utility model discloses the device can be convenient obtain the biggest shock response peak acceleration.
The suspension rod and the balance weight are preferably in detachable threaded connection, so that the overall quality of the device can be changed by replacing the balance weight (although the natural frequency of the device can be changed by replacing the balance weight, the number of the shock response peak values output by the device cannot be influenced), the response characteristic of the device is adjusted, the maximum shock response peak value acceleration output by the device is changed, and the false behavior caused by the fact that different laboratories are communicated or historical records are used as test results is avoided.
The utility model discloses in, the polished rod is the circular cone column, its with threaded connection is passed through to the backup pad, and this structure and connected mode are convenient for reach the messenger the device is verified to ability only exports an impulse response peak value.
As a preferable scheme: all parts of the capacity verification device are connected by threads without adopting a welding process, and mainly the deformation and harmful stress of the parts are prevented.
And a reinforcing plate is arranged between the supporting plate and the base.
The reinforcing plate is in the both sides of backup pad all have the setting.
The base and the supporting plate are preferably made of aluminum alloy materials which are light in weight, good in rigidity, free of rusting and easy to machine; the suspension rod and the balance weight are recommended to be made of stainless steel materials, so that the device is not prone to deformation and rusting in the repeated use process, the specific gravity of the stainless steel materials is large, the overall size of the device is reduced, the high hardness of the stainless steel can prevent the suspension rod and the balance weight from deforming due to collision in the transportation and use processes, the impact response peak value of the device is changed, and the accuracy of a verification result is affected.
Utilize the utility model discloses the mode introduction that the ability verification device carried out the ability verification activity is as follows:
will the utility model discloses the capability verification device distributes to different laboratories, and each laboratory is installed as required and is adjusted, according to the biggest shock response peak acceleration data of feedback, assesses the shock test detectability in this laboratory.
Compared with the prior art, the utility model discloses the technique has following advantage:
1) the utility model discloses impact test ability verifying attachment only is equipped with single suspension rod, can avoid the natural frequency of each degree of freedom weight to influence each other in the ability verifying attachment of complicated structure to cause the influence to the biggest impulse response peak acceleration of device output, be favorable to improving the accuracy of test result;
2) the utility model discloses capability verification device overall structure is simple, low in manufacturing cost, and the transportation is convenient, and this structure can guarantee well moreover that the device keeps good stability in the use repeatedly to can be true, effectual examination participant's impact test detectability.
Drawings
Fig. 1 is a state diagram of the utility model capability verification device;
FIG. 2 is a bottom view of the base of FIG. 1;
FIG. 3 is a schematic view of the structure of the suspension rod of FIG. 1;
description of reference numerals: 1-base, 2-support plate, 3-suspension rod, 4-mounting hole, 5-counterweight, 61, 62-impact sensor, 7-external controller, 8-reinforcing plate.
Detailed Description
As shown in fig. 1 and 2, the impact test capability verification device based on the maximum impact response peak acceleration of the present embodiment mainly includes a base 1, a support plate 2, a suspension rod 3, and a counterweight 5. The base 1 is a square metal plate, and the four corners are provided with mounting holes 4 for being connected with the table top of the impact testing machine. The support plate 2 is vertically fixed at the center of the upper surface of the base 1 as shown in fig. 2 by means of bolts 11 installed at the bottom surface of the base 1. The suspension rod 3 is in a conical column shape, and external threads are arranged at two ends of the suspension rod, as shown in fig. 3, one end of the suspension rod 3 is vertically fixed on the surface of the support plate 2 through a threaded structure to form a cantilever, and the other end of the cantilever is connected with the balance weight 5 through the threaded structure. The reinforcing plate 8 is a trapezoidal reinforcing plate, is arranged between the supporting plate 2 and the base 1, and is fixedly connected with the supporting plate and the base through bolts, as shown in fig. 1 and 2. In fig. 2, reference numeral 13 denotes bolts for connecting the base 1 to the two reinforcing plates 8 on the left side of the support plate 2 in fig. 1, reference numeral 14 denotes bolts for connecting the support bar 2 to the left reinforcing plate 8, and reference numeral 12 denotes bolts for connecting the base 1 to the right reinforcing plate of the support plate 2.
In order to enable the capability verification device to output the only maximum shock response peak acceleration, the device is required to output only one shock response peak when in use, and the condition that the accuracy of a capability verification result is influenced due to the fact that a plurality of peaks cause feedback data deviation of a laboratory is avoided. The number of impact response peaks is mainly related to the structure, size of the suspension rod 3, mounting manner of the support plate, and the like.
The parts of the capacity verification device are connected without adopting a welding process, all the connections adopt detachable threaded connections (including connection modes of connecting through bolts and directly forming studs and matched screw holes on two parts to be connected respectively), and the deformation and harmful stress of the parts can be prevented.
The base 1 and the supporting plate 2 of the device are preferably made of aluminum alloy materials which are light in weight, good in rigidity, free of rusting and easy to process. The suspension rods 3 and the balance weight 5 are preferably made of stainless steel materials so as to ensure that the device is not easy to rust and deform after being used repeatedly, the overall volume of the device can be reduced due to high specific gravity, and the device has high hardness so as to prevent collision and deformation in the transportation and use processes.
The mass range of the counterweight 5 of the device is recommended to be 200-800g, the overall mass of the verification device can be changed by replacing counterweights with different masses, the response characteristic of the device can be adjusted, and therefore the maximum shock response peak acceleration can be adjusted, and false behavior caused by communication among different laboratories or falsification with historical records as test results can be avoided.
The capacity verifying device has the following advantages: only a single suspension rod is arranged, so that the mutual influence of the inherent frequencies of all the freedom degree components in a device with a complex structure can be avoided, the influence on the maximum impact response peak acceleration output by a sample is further caused, and the accuracy of a test result is improved; the impact test device has the advantages of simple overall structure, low manufacturing cost and convenient transportation, and the structure can well ensure that the device keeps good stability in the repeated use process, thereby truly and effectively checking the impact test detection capability of participants.
The specific steps for completing the capability verification of the impact test by utilizing the capability verification device are as follows:
1) device mounting
And distributing the capability verification device to a test unit needing capability verification. As shown in fig. 1, the test unit fixes a base 1 of the capability verification device on the table of the impact tester, and installs impact sensors on both the suspension rod 3 and the base 1. The monitoring range of the maximum shock response peak acceleration of the shock sensor recommends the selection of 1g-100g (g is the acceleration of gravity). The impact sensor 61 installed on the base 1 is directly glued on the upper surface of the base 1, and the impact sensor 62 is glued on the free end of the suspension rod 3 close to the counterweight. The two impact sensors 61 and 62 are electrically connected to the external controller 7 of the impact tester via data lines, respectively. The impact sensor 61 is a control sensor, and cooperates with the external controller 7 to adjust the impact test conditions input to the impact test capability verification device by the impact tester. Impact sensor 62 is the monitoring sensor for detect through the utility model discloses the biggest impact response peak acceleration and the pulse duration of impact test ability verification device output.
The connection between the parts of the capacity verification device of the embodiment does not adopt a welding process, so the control of fastening torque in the installation process is very critical, the torque is insufficient, the vibration response can be reduced, the torque is too large, the local deformation of the parts can be generated, the overall resonance response is influenced, and in the actual installation process, the capacity verification mechanism is proposed to give out definite torque requirements aiming at different parts so as to ensure the consistency among different devices.
2) The pulse waveform inputted to the impact test stand (which means the waveform inputted to the capability verification device of the present embodiment) is set in accordance with the setting of the capability verification mechanism, and if the inputted pulse waveform is a half sine wave, the peak acceleration is 15g, and the pulse duration is 11ms, it is mainly reflected by the monitoring value of the impact sensor 61.
3) The maximum shock response peak acceleration is obtained from the monitored waveform of the shock sensor 62 and fed back to the capability verification mechanism.
4) The capability verification mechanism evaluates the capability of the unit for carrying out the impact test according to the maximum impact response peak acceleration speed fed back by the test unit, and specifically comprises the following steps:
the capability verification mechanism calculates the Z value of the maximum impulse estimated response peak acceleration of the capability verification device, wherein Z is (maximum impulse response peak acceleration-median)/standard IQR, and when the | Z | is less than or equal to 2, the capability of the impact test of the test unit is judged to be qualified.
The median value and the standard IQR value are obtained by the following steps:
selecting more than 18 test units to respectively perform the steps 1), 2) and 3) (note that the weight masses of the capacity verification devices distributed by the batch of test units are required to be the same, namely the natural frequencies of the batch of devices are kept consistent, and the impact test conditions input by an impact test bench are consistent), correspondingly obtaining more than 18 maximum impact response peak acceleration values, wherein the median value and the standard IQR value are obtained by calculating the median value and the standard IQR value of the more than 18 maximum impact response peak accelerations.
The capability verification device in the embodiment is suitable for GB/T2423.5-2019 environmental test part 2: test methods test Ea and guide: impact, GB/T28046.3-2011 environmental conditions and test 3 part mechanical load of electrical and electronic equipment of road vehicles, GB/T21563 2018 impact and vibration test of rail transit locomotive equipment, IEC 60068-2-27: 2008 and the like.
The device in this embodiment overall structure is simple to can used repeatedly more than 10 ten thousand times, with low costs, small, conveniently accomodate and transport.
The supporting rod and the counterweight part of the capacity verification device in the embodiment are key for influencing the resonance frequency (natural frequency) of the capacity verification device, and the processing technology of the capacity verification device has the following requirements:
processing size precision of the support rod: +0.02 mm; the weight error of the balance weight is controlled within +2 g. The processing errors of the two are designed to be positive deviations, and the purpose is to facilitate the correction of the actual measurement test result of the device at the later stage.
The above embodiments of the present invention are not limited to the protection scope of the present invention, and the embodiments of the present invention are not limited thereto, and all kinds of things are according to the above contents of the present invention, according to the common technical knowledge and the conventional means in the field, without departing from the present invention, the present invention is right under the basic technical idea of the above embodiments, the present invention makes modifications, replacements or changes of other various forms, which all should fall within the protection scope of the present invention.
Claims (7)
1. An impact test capability verification device based on maximum impact response peak acceleration is characterized by comprising a base, a supporting plate, a suspension rod and a balance weight, wherein the base is provided with a mounting hole used for being connected with a table board of an impact test machine; the capability verification means outputs only one shock response peak when in use.
2. The capability verification device of claim 1, wherein the suspension rod is threadedly connected with the counterweight.
3. The capability verification apparatus according to claim 2, wherein the suspension bar has a conical column shape, and is screw-coupled to the support plate.
4. A capability verification device according to claim 3, wherein threaded connections are provided between the components of the capability verification device.
5. The capability verification apparatus according to claim 4, wherein a reinforcing plate is provided between the support plate and the base.
6. The capability verification apparatus according to claim 5, wherein the reinforcing plate is provided on both sides of the support plate.
7. The capability verification device according to claim 6, wherein the base and the support plate are made of aluminum alloy material; the suspension rod and the balance weight are made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021900656.6U CN213481669U (en) | 2020-09-03 | 2020-09-03 | Impact test capability verification device based on maximum impact response peak acceleration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021900656.6U CN213481669U (en) | 2020-09-03 | 2020-09-03 | Impact test capability verification device based on maximum impact response peak acceleration |
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| CN213481669U true CN213481669U (en) | 2021-06-18 |
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| CN202021900656.6U Active CN213481669U (en) | 2020-09-03 | 2020-09-03 | Impact test capability verification device based on maximum impact response peak acceleration |
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