CN110261244A - A kind of pneumatic type low velocity impact mechanism of impact test - Google Patents
A kind of pneumatic type low velocity impact mechanism of impact test Download PDFInfo
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- CN110261244A CN110261244A CN201910610651.5A CN201910610651A CN110261244A CN 110261244 A CN110261244 A CN 110261244A CN 201910610651 A CN201910610651 A CN 201910610651A CN 110261244 A CN110261244 A CN 110261244A
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- hammer body
- guide rail
- impact
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- 238000009863 impact test Methods 0.000 title claims abstract description 34
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 59
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 6
- 230000003116 impacting effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 238000013480 data collection Methods 0.000 description 5
- 208000014674 injury Diseases 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
Abstract
The present invention relates to a kind of pneumatic type low velocity impact mechanisms of impact test, including connecting cylinder, the end of connecting cylinder is fixedly connected with the guide rail being parallel to each other, cylinder is fixed in connecting cylinder, the pneumatic actuating strut direction guiding rail direction of the cylinder extends, guide rail is equipped with a block stamp hammer body to move up and down along guide rail, block stamp hammer body is fixed with block stamp tup far from one end of cylinder, the other end of block stamp hammer body is fixed with card column, and card column catches on or separates with the fixed buckle structure for being located at pneumatic movement boom end；The mechanism structure is simple, it is convenient for carrying, using on shock machine, it can guarantee that block stamp is moved along guide post, the direction of mechanism installation determines impact direction, therefore can realize and impact at any angle, it is all feasible for impacting up and down, the display angle of attack that the inclinometer installed on testing machine can be convenient；The anti-secondary pulse mechanical structure of design can effectively capture the block stamp on impacting rebound, prevent the secondary pulse to testpieces.
Description
Technical field
The present invention relates to the pneumatic type low velocity impact machines of impact test technical field more particularly to a kind of impact test
Structure.
Background technique
Composite material is in an increasingly wide range of applications in aviation and civilian industry field, and composite material parts exist
It unavoidably will receive impact injury during manufacture and use, and composite material impact damage is more sensitive, easily causes
The defects of layering, cracking, to reduce the performance of material and structure.Thus in structure design and engineering Application Research, usually
It is tested for the property after introducing impact injury to material or structure.
In aviation field, there are two types of the impact injury of introducing is usual: small quality formed punch high speed impact or big quality block stamp are low
Speed impact.About big quality block stamp low velocity impact, the usually used prefabricated impact injury of desk-top shock machine, but testpieces
It is necessarily mounted at the test space of shock machine, impact injury can not be introduced in structural member testing ground.It is currently existing just
The formula type low-velocity impact testing machine of taking has drop hammer type or spring etc., but has some disadvantages: that any angle impact can not be carried out, therefore
It can not be in any position pre-damage of structure；Single block stamp impact energy range is smaller；The disadvantages of structure is not light enough.
Speed measuring device is commonly provided on shock machine, to assess impact energy.The dress that tests the speed of existing shock machine
It sets, its usual measuring principle is to measure block stamp by time t required for fixed range s, then calculates average speed vm
=s/t, it is believed that average speed vmI.e. block stamp impact specimen surface when instantaneous velocity average speed vmInstead of instantaneous velocity.
Summary of the invention
In order to overcome the disadvantages of the above prior art, it is simple, light convenient for shifting that the object of the present invention is to provide a kind of structures
It is dynamic, it can be impacted in testpieces any position, it can be in the gas of the impact test of structural test scene introducing low velocity impact
Dynamic formula low velocity impact mechanism.
In order to achieve the above objectives, the present invention uses following technical scheme, a kind of pneumatic type low velocity impact of impact test
Mechanism, including connecting cylinder, the end of the connecting cylinder are fixedly connected with the guide rail being parallel to each other, and the guide rail and connecting cylinder
End face is vertical, is fixed with cylinder in the connecting cylinder, and the pneumatic actuating strut direction guiding rail direction of the cylinder extends, and is located at phase
Mutually between parallel guide rail, the guide rail is equipped with a block stamp hammer body to move up and down along guide rail, and the block stamp hammer body is separate
One end of cylinder is fixed with block stamp tup, and the other end of the block stamp hammer body is fixed with card column, the card column and fixation
The buckle structure for being located at pneumatic movement boom end catches on or separates.
The buckle structure includes the connection pedestal for being fixedly connected on pneumatic movement boom end, is movably connected in connection bottom
On seat and the grab that is symmetrically set, passes through spring between the grab being symmetrically set and connect, the end of the card column
It struts symmetrical grab to hang upside down on grab, the block stamp hammer body is connected with pneumatic actuating strut.
A sliding block is arranged in the card column, which moves up and down along the kelly of card column；The block stamp hammer body with lead
Rail connects by linear bearing
The connecting cylinder, which is equipped on the end face of guide rail one end, is fixedly connected with electromagnet firm banking, and the electromagnet is solid
Determine pedestal and be fixedly connected with sucked type electromagnet far from the end of connecting cylinder, the sucked type electromagnet and fixation are located at connecting cylinder
On electro-magnet switch electrical connection, the sucked type electromagnet be powered when, the magnetic absorption block stamp hammer body of generation.
The end of the connecting cylinder is fixedly connected with support pedestal, and the guide rail being parallel to each other is fixedly connected with the support bottom
On seat, the guide rail is fixedly connected with support footstock far from one end of support pedestal, and the support footstock is located at block stamp hammer body
Lower section.
The other end of the connecting cylinder opposite rail is equipped with the gripping handle being convenient for carrying.
The air inlet of the cylinder is connected with jettron by pipeline, which, which is equipped with, opens this pneumatically
The jettron handle of switch.
It is fixed with linear displacement transducer in the connecting cylinder, inserted with straight-line displacement in the linear displacement transducer
The end of sensor pull rod, the linear displacement transducer pull rod extends to outside connecting cylinder, and connects with the upper surface of block stamp hammer body
Touching, the linear displacement transducer pull rod follow block stamp hammer body to move, and the linear displacement transducer detects straight-line displacement
The mobile displacement of sensor pull rod, and after the signal that will test is converted by displacement signal converter, it is acquired by data
Module is sent to processor and carries out data processing.
The end that the linear displacement transducer pull rod is contacted with block stamp hammer body is fixedly connected with standby tight nut, this is standby
Tight nut is contacted with the block stamp hammer body.
The connecting cylinder is equipped with the digital display inclinometer for detection angles.
The beneficial effects of the present invention are: structure is simple, it is convenient for carrying, using on shock machine, can guarantees block stamp
It is moved along guide post, the direction of shock machine installation determines impact direction, therefore can realize and impact at any angle, upwards
It is all display angle of attack feasible, that the inclinometer installed on testing machine can be convenient with downward impact；Pass through cylinder conduct
Power is driven, impact velocity can be adjusted according to the atmospheric pressure value of control cylinder, that is, adjust the size of impact energy；Block stamp hammer body
One end be fixed with card column, card column catches on or separates with the fixed buckle structure for being located at pneumatic movement boom end, this is specially
The capture when structure of door design may be implemented to rebound when block stamp impact is completed to block stamp, can be effectively prevented in impact process
The secondary multiple punching of block stamp；Block stamp is connect with linear displacement transducer, can obtain the displacement signal of impact overall process block stamp, and can
Signal is acquired by data collection system, is stored and processed, and then obtains the rate curve of impact process.
Detailed description of the invention
Fig. 1 is that the present invention uses the structural schematic diagram on shock machine；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 be in the present invention before the experiment, the fit structure schematic diagram of grab and card column；
Fig. 4 is fit structure schematic diagram when card column is separated with grab in the present invention；
Fig. 5 is in the present invention after block stamp impact, and block stamp hammer body rebound, card column enters structural schematic diagram when grab；
Fig. 6 is that card column hangs upside down the structural schematic diagram in grab in the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or hidden
It include one or more of the features containing ground；In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two.
Embodiment
A kind of pneumatic type low velocity impact mechanism of impact test as shown in Figure 2, including connecting cylinder 5, the connecting cylinder 5
End be fixedly connected with the guide rail 7 being parallel to each other, and the guide rail 7 is vertical with the end face of connecting cylinder 5, solid in the connecting cylinder 5
Surely it is equipped with cylinder 9,12 direction guiding rail of pneumatic actuating strut, 7 direction of the cylinder 9 extends, and is located between the guide rail 7 being parallel to each other,
The guide rail 7 is equipped with a block stamp hammer body 13 to move up and down along guide rail 7, the described one end of block stamp hammer body 13 far from cylinder 9
It is fixed with block stamp tup 14, the other end of the block stamp hammer body 13 is fixed with card column 27, and the card column 27 is set with fixation
Buckle structure in pneumatic 12 end of actuating strut catches on or separates.
In order to facilitate carrying, gripping handle 4 described in gripping handle 4 is equipped in the other end of the connecting cylinder opposite rail and is used
It is being to carry out impact test to different angle in facilitating people to carry the device, while conveniently, the connecting cylinder is as whole
The base apparatus of a device is opposite in the connecting cylinder in order to which the guide rail 7 can be easily fixed on connecting cylinder
The other end of gripping handle is fixedly connected with support base 6, and then the guide rail 7 is fixedly connected in support base 6,
Guarantee that guide rail 7 can be stable is mounted on connecting cylinder, in order to guarantee the guide rail 7 being parallel to each other when in use, globality
More preferably, it is fixed in the guide rail far from one end of support base 6 and supports footstock 8, which will be parallel to each other
Guide rail 7 connects, and when in use, can play the role of support, while effectively in order to which the support base 8 will not influence
Structural member is impacted to the whereabouts of block stamp hammer body 13, therefore the support base 8 is located at the lower section of block stamp hammer body, while block stamp
Tup, which can pass through support base and be formed to structural member, to be impacted；The block stamp hammer body 13 moves up and down on guide rail,
It can guarantee that the beater mechanism can carry out impact test to the structural member of any angle, solving at present can only be in level side
The problem of carrying out impact test upwards.
At work, when needing to carry out impact test, the card column is caught on buckle structure, guarantees the cylinder 9
Pneumatic actuating strut 12 be located at shorten the case where, by pneumatic actuation cylinder 9, the cylinder 9 drives pneumatic actuating strut, and 12 stretch
It is long, pneumatic actuating strut 12 reach capacity position when, block stamp hammer body 13 continues traveling downwardly under the action of inertia, card column 27 and buckle
Structure separation, block stamp tup 14 carry out impact test, after impacting, block stamp hammer body 13 to fixed structure piece detected
Rebound uplink, and the card column 27 is hung upside down on the buckle structure, effectively placed the possibility for carrying out secondary pulse.
The portable small and exquisite block stamp actuation mechanism design of pneumatic type, anti-secondary pulse structure are designed and are passed using straight-line displacement
The speed measuring device that sensor accurately measures the speed of impact overall process is most important three bright spots of the design.
Further, in order to guarantee pneumatic actuating strut 12 when reaching capacity position, block stamp hammer body can rapidly with card
Buckle structure separation, the speed of guarantee period impact, while guaranteeing to fall what during rebound, the card column can be stable
It hangs on the buckle structure, it is ensured that it is not in secondary pulse,
As depicted in figs. 1 and 2, the buckle structure includes the connection pedestal for being fixedly connected on pneumatic 12 end of actuating strut
24, it is movably connected in the grab 25 on connection pedestal 24 and being symmetrically set, is passed through between the grab 25 being symmetrically set
Spring 26 connects, and the end of the card column 27 struts symmetrical grab 25 and hangs upside down on grab 25, the block stamp is hammered into shape
Body 13 is connected with pneumatic actuating strut 12.Symmetrical grab 25 is movably connected on connection pedestal 24, and passes through bullet
Spring 26 connects, it can be ensured that the grab 25 is fastened and is automatically separated, while the barb on the grab 25 is to corresponding
It is oppositely extending, guarantee the capitate column cap card column of card column upper end, at the same can when being rebounded card column column cap energy
Grab is enough strutted, hangs upside down it on grab.
While in order to further guarantee that the card column is that barb in separation, can be separated rapidly, and not
May require that its separation is demonstrate,proved in too big trying hard to keep, particularly the card column 27 on be arranged with a sliding block 28, the sliding block 28 is along card column
27 kelly moves up and down；The block stamp hammer body 13 is connect with guide rail 7 by linear bearing 15.
When in use, the card column 27 is inserted into symmetrical grab, and extends to the interior top of grab,
The sliding block 28 struts the symmetrically arranged grab between symmetrical grab, at the same the diameter of the sliding block be greater than or
Equal to the diameter of 27 column cap lower end maximum of card column, while when block stamp hammer body is not separated with buckle structure, as described in Figure 3
Sliding block and grab it is opposing stationary, when cylinder pushes pneumatic actuating strut to reach the limit of position, pneumatic actuating strut stops, described
Card column continue traveling downwardly under the action of inertia, as shown in Figure 4 when the clamp of card column is moved to the position of sliding block, drive slide
Downlink, block stamp hammer body are separated with buckle structure together for block and card column, free-falling, and the block stamp tup on the block stamp hammer body is to knot
Component carry out impact test, after the completion of impact, block stamp hammer body rebounds, the card column on block stamp hammer body as shown in Figure 5 into
Enter into grab, and barb avoids carrying out secondary pulse in the grab as shown in Figure 6.
Simultaneously in order to guarantee when cylinder does not push pneumatic actuating strut to move, insertion band that the card column can be stable
In symmetrical grab, and the sliding block can strut symmetrical grab, guarantee the block stamp hammer body with
The connection of pneumatic actuating strut temporary securement of stabilization, is fixedly connected with electricity on the end face that the connecting cylinder 5 is equipped with 7 one end of guide rail
Magnet firm banking 20, the electromagnet firm banking 20 are fixedly connected with sucked type electromagnet far from the end of connecting cylinder 5
21, which is electrically connected with the fixed electro-magnet switch 22 being located on connecting cylinder 5, the sucked type electromagnetism
Iron 21 is when being powered, the magnetic absorption block stamp hammer body 13 of generation.Particularly the block stamp hammer body is moved to topmost,
Card column is inserted into grab, while the sliding block struts grab, and the electro-magnet switch is opened at this time, sucked type electricity
Magnet 21 is powered, and generates magnetism, is adsorbed with block stamp push top, guarantees its stability, card column opposing slider is avoided to be slided
It is dynamic, avoid sliding block from before starting the work cannot strutting the grab.
During the test, it is ensured that cylinder drives the stretching speed of pneumatic actuating strut to suit the requirements speed when being impacted
Degree, pneumatic driving structure 2 as described in Figure 1 include that gas tank 35, the air compressor 30 being located on gas tank 35, and the air compress
Machine 30 is connected to the gas tank 35, is located at the pneumatic operated valve 34 being connected on gas tank 35 with gas tank 35, the pneumatic operated valve 34 and cylinder
9 jettrons 10 being equipped with are connected to by pipeline, and the jettron 10 is equipped with jettron handle 11, the gas tank
The digital display manometer 32 and relief valve 33 for detecting pressure are additionally provided on 35, the air compressor 30 is equipped with and this
The switch 31 that air compressor 30 is electrically connected.Before carrying out impact experiment, air compressor work is opened by switch 31, together
When pneumatic operated valve close, after which compresses air and be stored into gas tank, it is true by the digital display manometer on gas tank
Determine the pressure value of gas tank, while guaranteeing that the pressure value of the gas tank is greater than the pressure value of cylinder movement, then passes through relief valve tune
The pressure of air in whole gas tank stops adjustment, is carrying out when the pressure value in gas tank is equal with the pressure value that cylinder uses
When test, open pneumatic operated valve, while jettron is opened by jettron handle 11, the compressed air in gas tank into
The pneumatic actuating strut for entering into cylinder driving cylinder is extended, and provides power for percussion mechanism.
For convenience when being detected, the displacement of block stamp hammer body can be detected, facilitates the processing of data, institute
Stating data collection system 3 includes the linear displacement transducer 16 being located in connecting cylinder 5, and one end is inserted in linear displacement transducer
In 16, the other end extends to the linear displacement transducer pull rod 17 outside connecting cylinder 5, and the linear displacement transducer pull rod 17 exists
Movement in linear displacement transducer 16, the linear displacement transducer 16 are used to detect the position of linear displacement transducer pull rod 17
Move data, the end of the linear displacement transducer pull rod 17 outside connecting cylinder 5 is equipped with standby tight nut 8, this for tight nut 8 with
The upper end face contact of block stamp hammer body 13, the linear displacement transducer 16 is by being electrically connected with displacement signal converter 19, the position
Shifting signal converter 19 and processor 37 are electrically connected by data acquisition module 36, and the processor 37 is by data acquisition module
36 collected displacement datas and time data are converted into instantaneous speed.When carrying out impact test, since straight-line displacement passes
One end of sensor pull rod 17 is located in linear displacement transducer 16, and can relatively move in the linear displacement transducer 16,
Therefore when block stamp hammer body during the falling process, (standby tight nut 8 can ensure linear displacement transducer the case where due to gravity
Pull rod 17 is contacted with block stamp push top), linear displacement transducer pull rod 17 and block stamp hammer body fall simultaneously, the straight line
Displacement sensor 16 detects the displacement of linear displacement transducer pull rod 17, which is the position of block stamp moving hammer
It moves, the data after then the linear displacement transducer 16 will test are sent to after being converted by displacement signal converter 19
Data acquisition module, the data that data acquisition module is received are sent to processor (computer terminal) and are handled, and
Instantaneous speed of the block stamp tup in impact is calculated, the formula used belongs to for the operational formula in the application background technique
The public office common sense of the art is no longer described in detail herein.
Further, in order to guarantee to measure inclined angle, when carrying out inclined impact described
Connecting cylinder 5 is equipped with the digital display inclinometer 29 for detection angles.
A kind of impact test method of the pneumatic type low velocity impact mechanism of impact test, follows the steps below:
Step 1: the hand-held handle 4 that holds withstands on beater mechanism 1 in the fixed structure piece for needing to detect impact test,
And shock machine is fixed on test site, guarantee that the end of the guide rail 7 of beater mechanism 1 is withstood in fixed structure piece；
Electro-magnet switch 21 is opened, 21 energizing magnetic of sucked type electromagnet, while block stamp hammer body 13 is moved to guide rail
7 the top, card column 27 enter in symmetrical grab 25, and sliding block 28 struts symmetrical grab 25, and leads to
It crosses sucked type electromagnet 21 and adsorbs the top that block stamp hammer body 13 makes block stamp hammer body 13 be fixed on guide rail 7；
Switch 31 is opened, and pneumatic operated valve 34 is closed, and the work of air compressor 30 is that gas tank 35 is inflated, it is ensured that digital display manometer
32 detect that the pressure of gas tank is greater than the pressure value of setting, turn off the switch 31, adjust the gas in gas tank 35 by relief valve 33
Pressure guarantees that air pressure is identical as the pressure value of setting；
Step 2: opening pneumatic operated valve 34, and the pneumatic actuating strut 12 of jettron 10, cylinder 9 pushes under block stamp hammer body 13
Row, when pneumatic actuating strut 12 is located at extreme position, block stamp hammer body 13 continues traveling downwardly under the action of inertia, and card column 27 is from phase
It mutually exits in symmetrical grab 25 and is separated with pneumatic actuating strut 12, block stamp hammer body 13 continues traveling downwardly, with fixed knot to be detected
Component impacts, and rebounds, and 13 uplink of block stamp hammer body after rebound, card column 27 enters in symmetrical grab 25,
And it hangs upside down in grab 25；
At the same time, during block stamp 13 downlink of hammer body, linear displacement transducer pull rod 17 is with block stamp hammer body 13
Downlink, linear displacement transducer 16 detect the displacement of the displacement as block stamp hammer body 13 of linear displacement transducer pull rod 17, and will
The displacement data detected is sent to data acquisition module 36, the data acquisition after converting by displacement signal converter 19
The data received are sent to processor 37 and carry out processing calculating by module 36, obtain instantaneous speed.
Preparation before experiment can be specifically divided into when carrying out impact test impacts work and data collection task；
Beater mechanism 1 is fixed on the required structural member detected by preparation before testing, while according to inclination angle
The demand of degree adjusts the angle of beater mechanism 1, it is ensured that the angle that digital display inclinometer 29 is shown meets the angle of demand, then drives
Dynamic pneumatic mechanism and data collection system are associated with the component on the beater mechanism, including electrical connection and pipeline, machine
Tool connection, after being completed, pneumatic operated valve is closed, and opens switch, and air compressor is started to work, and will be compressed
Air is stored in gas tank, while detecting that the pressure of gas tank is greater than the pressure value of setting according to digital display manometer 32, and closing is opened
31 are closed, the air pressure in gas tank 35 is adjusted by relief valve 33, guarantees that air pressure is identical as the pressure value of setting,
The block stamp hammer body is moved up at the same time, is inserted into card column in grab, while sliding block struts grab,
Electromagnetic switch is opened at this time, and sucked type electromagnet 21 is powered (electromagnetic switch is connect with sucked type electromagnet by conducting wire 23), produces
The block stamp hammer body is adsorbed on sucked type electromagnet 21 by magnetisation, it is ensured that block stamp hammer body relatively moves, and completes
After all preparations, impact test is carried out；
Impact test opens the pneumatic operated valve, then the last preparation before best impact experiment passes through gas
Dynamic switch knob opens jettron, and the compressed air in gas tank is entered in cylinder by pipeline, drives the pneumatic dynamic of cylinder
It is extended as bar, which drives block stamp hammer body downlink, block stamp hammer body and sucked type electromagnetism during elongation
Iron 21 separates, while guaranteeing that the downstream rate of the cylinder movement bar is greater than the speed of freely falling body, guarantees that sliding block is opposite with card
Hook stationary apparatus, it is ensured that sliding block can strut grab, and when pneumatic actuating strut is elongated to extreme position, block stamp hammer body is used
Continue to fall under the action of property, while card column falls off outward from grab, when the clamp of card column reaches the position of sliding block, band
The case where movable slider falls together, avoids grab card main card column exists, when block stamp hammer body and pneumatic actuating strut are completely separated,
Free-falling is impacted with the structural member detected is needed, and after impact, block stamp hammer body rebound uplink, card column is inserted into grab
In, and hang upside down in grab, it avoids that secondary pulse occurs.(12 setting in motion of cylinder operating bar makes block stamp be detached from electromagnet 21
It travels forward along guide rail 7, when cylinder operating bar 12 reaches extreme position, as shown in figure 4, block stamp continues under effect of inertia
It travels forward, card column 27 is disconnected pedestal 24 and pulls out sliding block 28 from grab 25, as shown in figure 5, block stamp hits examination
It is sprung back after testing part surface, card column 27 will be moved in grab 25, as shown in fig. 6, at this point, anti-secondary pulse device is completed
Interception to block stamp).
While carrying out impact test, linear displacement transducer pull rod 17 and block stamp hammer body fall simultaneously, described
Linear displacement transducer 16 detect that the displacement of linear displacement transducer pull rod 17, the displacement measured are that block stamp tup moves
Dynamic displacement, after the data after then the linear displacement transducer 16 will test are converted by displacement signal converter 19
It is sent to data acquisition module, the data that data acquisition module is received are sent at processor (computer terminal)
Reason, and instantaneous speed of the block stamp tup in impact is calculated, complete entire impact test.
The test method, it is ensured that speed of dropping hammer is realized by drop hammer speed measuring device and data collection system, it can be achieved that impact
The precise measurement of instantaneous velocity, and the real-time acquisition of impact overall process data.Block stamp is moved along guide post, shock machine
The direction of installation determines impact direction, therefore can realize and impact at any angle, and it is all feasible for impacting up and down, examination
Test the display angle of attack that the inclinometer installed on machine can be convenient；Pressure value by controlling air accumulator adjusts impact speed
Degree adjusts the size of impact energy.
Above embodiments are only to of the invention for example, do not constitute the limitation to protection scope of the present invention,
Within the same or similar design of all and present invention all belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of pneumatic type low velocity impact mechanism of impact test, which is characterized in that including connecting cylinder (5), the connecting cylinder
(5) end is fixedly connected with the guide rail (7) being parallel to each other, and the guide rail (7) is vertical with the end face of connecting cylinder (5), the company
Cylinder (9) are fixed in connect cylinder (5), pneumatic actuating strut (12) direction guiding rail (7) direction of the cylinder (9) extends, and is located at phase
Mutually between parallel guide rail (7), the guide rail (7) is equipped with a block stamp hammer body (13) to move up and down along guide rail (7), the punching
Hammer hammer body (13) is fixed with block stamp tup (14) far from the one end of cylinder (9), and the other end of the block stamp hammer body (13) is fixed
Equipped with card column (27), the card column (27) catches on or separates with the fixed buckle structure for being located at pneumatic actuating strut (12) end.
2. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 1, which is characterized in that the buckle
Structure includes being fixedly connected on the connection pedestal (24) of pneumatic actuating strut (12) end, be movably connected in connection pedestal (24) and
The grab (25) being symmetrically set is connected between the grab being symmetrically set (25), the card column by spring (26)
(27) end struts symmetrical grab (25) and hangs upside down on grab (25), by the block stamp hammer body (13) and pneumatic movement
Bar (12) connects.
3. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 2, which is characterized in that the card column
(27) sliding block (28) are arranged on, which moves up and down along the kelly of card column (27)；The block stamp hammer body (13)
It is connect with guide rail (7) by linear bearing (15).
4. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 3, which is characterized in that the connection
Cylinder (5) is equipped on the end face of guide rail (7) one end and is fixedly connected with electromagnet firm banking (20), the electromagnet firm banking
(20) end far from connecting cylinder (5) is fixedly connected with sucked type electromagnet (21), which sets with fixation
Electro-magnet switch (22) electrical connection on connecting cylinder (5), the sucked type electromagnet (21) is when being powered, the magnetism of generation
It adsorbs block stamp hammer body (13).
5. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 2, which is characterized in that the connection
The end of cylinder (5), which is fixedly connected with, supports pedestal (6), and the guide rail being parallel to each other (7) is fixedly connected on the support pedestal (6),
The guide rail (7) is fixedly connected with far from one end of support pedestal (6) and supports footstock (8), and the support footstock (8) is located at block stamp
The lower section of hammer body (13).
6. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 1, which is characterized in that the connection
The other end of cylinder (5) opposite rail (7) is equipped with the gripping handle (4) being convenient for carrying.
7. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 1, which is characterized in that the gas
The air inlet of cylinder (9) is connected with jettron (10) by pipeline, which, which is equipped with, opens the jettron
Jettron handle.
8. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 1, which is characterized in that the connection
Linear displacement transducer (16) are fixed in cylinder (5), inserted with linear displacement transducer in the linear displacement transducer (16)
Pull rod (17), the end of the linear displacement transducer pull rod (17) extend to connecting cylinder (5) outside, and upper with block stamp hammer body (13)
End face contact, the linear displacement transducer pull rod (17) follow block stamp hammer body (13) to move, and the straight-line displacement sensing
Device (16) detects linear displacement transducer pull rod (17) mobile displacement, and the signal that will test passes through displacement signal converter
(19) after converting, processor (37) is sent to by data acquisition module (36) and carry out data processing.
9. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 8, which is characterized in that described is straight
The end that linear movement pick-up pull rod (17) is contacted with block stamp hammer body (13) is fixedly connected with standby tight nut (18), this is for tight nut
(18) it is contacted with the block stamp hammer body (13).
10. the pneumatic type low velocity impact mechanism of a kind of impact test according to claim 1, which is characterized in that described
Connecting cylinder (5) is equipped with the digital display inclinometer (29) for detection angles.
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| CN201910610651.5A CN110261244A (en) | 2019-07-08 | 2019-07-08 | A kind of pneumatic type low velocity impact mechanism of impact test |
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| CN201910610651.5A CN110261244A (en) | 2019-07-08 | 2019-07-08 | A kind of pneumatic type low velocity impact mechanism of impact test |
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| CN113176160A (en) * | 2021-03-26 | 2021-07-27 | 国能锅炉压力容器检验有限公司 | Uniform-velocity rebound hardness test method based on average impact rebound velocity measurement |
| CN114486490A (en) * | 2022-01-20 | 2022-05-13 | 哈尔滨工程大学 | Device for preventing secondary impact of drop hammer in drop hammer impact experiment |
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