CN107132136B - A method of realizing vertical impact test - Google Patents
A method of realizing vertical impact test Download PDFInfo
- Publication number
- CN107132136B CN107132136B CN201710403610.XA CN201710403610A CN107132136B CN 107132136 B CN107132136 B CN 107132136B CN 201710403610 A CN201710403610 A CN 201710403610A CN 107132136 B CN107132136 B CN 107132136B
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- jump bit
- vertical
- accelerating coil
- product
- guide rod
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Classifications
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- 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
- G01N3/317—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
The present invention relates to a kind of methods for realizing vertical impact test, this method is used cooperatively with vertical mechanical shock test machine, so that jump bit is obtained bigger impact energy, overcomes the deficiency of existing vertical mechanical shock test machine, meet the requirement that product tests big energy impact.
Description
Technical field
The present invention relates to a kind of method for realizing vertical impact test, this method is tried for a kind of vertical mechanical shock
Test machine.
Background technique
The product of plant produced needs to test numerous performances of product, to verify product before being delivered for use
Whether requirement is met.In these tests, the mechanical resistant impact property test of product is important one therein.It is existing
Vertical mechanical shock test machine have it is following several, contain realize vertical impact test method.
Fig. 1 is impact test test machine of the steel ball from playback, including testboard 1, the test being mounted on testboard 1
Frame.Testing jig includes 3, two guide posts 2 of lead screw, slide unit 4, crossbeam 5 and motor 9.Screw rod and guide post 2 are vertically installed at survey
In test stand 1, lead screw 3 is located at the center of two guide posts 2, and lead screw 3 can rotate, and guide post 2 is fixed.The top of two guide posts 2
Portion is equipped with the crossbeam 5 for fixing motor 9, and the upper end of lead screw 3 is connect with the main shaft of motor 9.Slide unit 4 passes through screw pair and silk
Thick stick 3 cooperates, and is also cooperated by prismatic pair and guide post 2.Horizontal bracket 10 is installed on slide unit 4, is installed on bracket 10 directed downwardly
Magnet base 6 and laser range finder 11；The bottom face of magnet base 6 and the transmitting terminal of laser range finder are located at sustained height.Testboard
On be slidably fitted with two pairs of locating pieces 7, two pairs of locating pieces surround a square region jointly；One pair of them locating piece can surveyed
Transverse movement in test stand and another pair locating piece being capable of the longitudinal movement on testboard；The end of two neighboring locating piece passes through bullet
Property band 12 connect.Due to the surface of measured object be plane and testboard be it is horizontal positioned, steel ball is able to maintain static shape
State, when the magneticaction of magnet base is when steel ball, steel ball will be moved along the direction magnetropism seat of power realizes that automatic homing picks up
It takes.The top edge of elastic webbing is not less than the top of locating piece.Locating piece 7 is the truncated rectangular pyramids that cross section is right-angled trapezium, and upper bottom
Face is greater than bottom surface, and side used for positioning is an inclined surface on locating piece 7, and the angle of the side and horizontal plane is 45~80 °.
This structure can be completely fixed measured object 8, to prevent from being subjected to displacement influence test result during the test.Locating piece
Sheet rubber is set on side used for positioning on 7, so that it is bad to protect the edge of measured object 8 not knocked.Locating piece 7 passes through fastening spiral shell
Bolt is fixed on testboard 1.
Fig. 2 is a kind of electrician's conduit shock machine, including bottom plate 1 and top plate 2, two sides between the bottom plate 1 and top plate 2
It is respectively equipped with column 3, guide rod 4 is additionally provided between the bottom plate 1 and top plate 2, the guide rod 4 is described between two root posts 3
Lift beam 5 is equipped between bottom plate 1 and top plate 2, the lift beam 5 is equipped with longitudinal hole and is socketed on guide rod 4 and column 3, institute
1 upper end of bottom plate is stated equipped with connecting plate 6, the 6 upper end two sides of connecting plate are equipped with test clamp 7, it is cased with jump bit 8 on the guide rod 4,
8 upper end of jump bit is radially provided with boss, and the front and rear sides of the lift beam 5 are respectively equipped with hook 9, described to link up under 9
End and the boss lower edge of jump bit 8 cooperate；Described two hooks 9 are with guide rod 4 in same perpendicular；The lift beam 5
Both ends be equipped with clamping screw I10, the front end of the clamping screw I10 passes through lift beam 5 and resists column 3；4 upper end of guide rod
Through top plate 2,2 front end of top plate is equipped with clamping screw II11, and the front end of the clamping screw II11 is resisted across top plate 2 leads
Bar 4；The guide rod 4 is prismatic, and three faces of the guide rod 4 are equipped with scale, height can be seen from all directions.
Above two vertical mechanical shock test machine is all that the gravitional force of shock machine jump bit is converted into institute
The kinetic energy needed, i.e. impact energy.Mechanical shock energy ratio if necessary is larger, can only be carried out by two aspects: one
It is the quality for increasing jump bit, second is that increase height of the jump bit relative to product testing part, gravitional force is increased with this.But
It is that when the jump bit quality of mechanical shock test's machine is excessive, will lead to equipment heaviness, be not easy to the operation of impact test；Work as punching
When hammer increases relative to the height of product testing part, and necessarily lead to the increase of mechanical shock test's machine height.But due to
The limitation of the factors such as laboratory place, more impact energys required for cannot being improved by increasing height.
On the other hand, above two vertical mechanical shock test machine is needing to adjust jump bit relative to product testing part
Height when, be not easy to operate.
In view of drawbacks described above existing for current vertical mechanical shock test machine, it is urgent to provide a kind of different vertical machines
Tool shock machine, it is higher and higher to the impact energy of testing machine and size etc. with the mechanical shock test for meeting product
It is required that make jump bit relative to product testing part height when needing to adjust, it is easy to operate, to meet different need
It asks.
A kind of method for realizing vertical impact test is also needed simultaneously, and this method is for provided by the invention a kind of vertical
Formula mechanical shock test machine.
Summary of the invention
The present invention provides a kind of method for realizing vertical impact test, and this method is for provided by the invention a kind of vertical
Formula mechanical shock test machine.
Technical scheme is as follows:
A method of realizing vertical impact test, this method is used for a kind of vertical mechanical shock test machine, described
Vertical mechanical shock test machine by 1, transverse arm 2 of vertical arm, guide rod 3, jump bit 4, jump bit fixator 5, shock testing machine 6,
The part such as product fixator 7 forms；The vertical arm 1 is round bar shape, and both ends all have screw thread；The transverse arm 2 is also round bar shape,
Its both ends offers threaded hole, and vertical arm 1 is two, and one end of two vertical arm 1 is screwed into respectively in two threaded holes of transverse arm 2；
It is opened up on shock testing machine 6 there are two threaded hole, the other end of two vertical arm 1 is screwed into respectively in two threaded holes on shock testing machine；It leads
It is round bar shape to bar 3, is connected to the middle part of transverse arm 2, is arranged in parallel with perpendicular wall 1；Guide rod 3 can be welded on the middle part of transverse arm 2,
The middle part of transverse arm 2 can also be fixed on by fastener；When needing to adjust height of the jump bit 4 relative to product testing part,
Two vertical arm 1 are screwed, two vertical arm 1 are increased, while needing to guarantee that 2 holding of transverse arm is horizontal；The jump bit 4 has through-hole
41, guide rod 3 passes through through-hole 41, and jump bit 4 can be slided along the vertical direction of guide rod 3；Jump bit 4 is solid by jump bit
Determine device 5 to be fixed on guide rod 3；The product fixator 7 is located on shock testing machine 6, for the fixed product examination for doing impact test
Test part；The lower end of guide rod 3 is located at the top of product fixator 7, and the two does not contact.
Further, the jump bit fixator 5 is a screw, and 4 side of jump bit offers threaded hole, and the screw is twisted
In the threaded hole for entering jump bit 4.
A kind of method for realizing vertical impact test, comprising the following steps:
1) the product testing part for needing to carry out mechanical shock test is fixed on shock testing machine 6 using product fixator 7；
2) height of two vertical arm 1 is adjusted, and transverse arm 2 is made to be in horizontality；
3) the vertical mechanical shock test, machine powers on, and each accelerating coil 81 in accelerating coil component 8 produces
Raw electromagnetic field；
4) back-out screw jump bit 4 being fixed on guide rod 3, jump bit 4 moves downward under gravity, speed
It spends increasing；
5) after jump bit 4 enters accelerating coil component, under the action of gravity and electromagnetic force, speed is increasing, described
After jump bit 4 often passes through an accelerating coil, the connection of the accelerating coil and power supply that have been through is disconnected close to switch 12；
6) jump bit 4 reaches shock testing machine 6, impacts to product testing part, completes impact test.
Further, in the step 5) and 6) between further include following steps: jump bit 4 impact product testing part
Before, speed detector 13 detects the speed of jump bit 4, and by the speed data transmission to computer 10, computer 10 will be fast
Degree evidence is converted into energy datum, and the energy datum is transferred to display device 11, and show.
Further, the jump bit 4 is made of shell 42, magnetisable material 43, rear cover 44；The impact portion of shell is divided into reality
The heart, rear portion be it is hollow, hollow parts fill magnetisable material 43, then magnetisable material 43 is enclosed in shell 42 with rear cover 44.
Further, the magnetisable material 43 is rare-earth magnetic substance, and the rare-earth magnetic substance is in powdered.Work as jump bit
When impacting with product testing part, jump bit and product testing part bear biggish vibration.Common magnetisable material is one whole
Body, material is more crisp, not impact resistance.The fracture when magnetisable material of globality is impacted in order to prevent, influences magnetism, and the present invention adopts
With powdered magnetisable material.When by impact endurance test shock, powdered magnetisable material can be avoided fracture, and can be according to magnetic
The effect of power adjusts the position of itself, keeps magnetic force maximum.Meanwhile in order to further increase the magnetic force of magnetisable material, magnetisable material
The preferably magnetisable material of rare earth.
Further, the shock surface that the jump bit 4 is contacted with product testing part is convex surface or plane, preferably convex surface.
When the shock surface is convex surface, since contact surface is smaller, product testing part can be rushed by bigger under identical condition
Hit effect.
Further, in order to guarantee that jump bit 4 is avoided damage to when impacting with product testing part, the jump bit 4 is by shell
The material of body 42 is metal, preferably steel or copper material, tensile strength 370MPa-550MPa, Rockwell hardness 58-62,
The tensile strength of case material and the relationship of Rockwell hardness meet: tensile strength × Rockwell hardness value is more than or equal to 21500 simultaneously
And it is less than or equal to 34000, preferably greater than or equal to 28000 and is less than or equal to 32000.When the tensile strength and Rockwell of case material
When the product of hardness is less than 21500, the intensity of shell is not able to satisfy requirement when impact；When the tensile strength and Rockwell of case material
When the product of hardness is greater than 34000, shell can become fragile, and also be unfavorable for the raising of its intensity, not be able to satisfy requirement when impact.
Further, vertical mechanical shock test machine further includes accelerating coil component 8, the accelerating coil component
8 include multiple accelerating coils 81.After accelerating coil is powered, electromagnetic field is generated, magnetic force is generated to having magnetic jump bit, drives
Jump bit acting, generates bigger impact energy on the basis of the gravitional force of jump bit is converted into kinetic energy, meets product examination
Test demand of the part to greater impact energy.Multiple accelerating coils 81 are annular in shape, are connected in turn and constitute accelerating coil group
Part 8.The jump bit 4 that accelerating coil component 8 is inserted in guide rod 3 and is fixed on guide rod 3, is fixed on transverse arm 2.
Further, vertical mechanical shock test machine further includes computer 10, display device 11, close to switch
12, speed detector 13.The speed detector 13 is mounted on shock testing machine 6, before detection jump bit 4 is contacted with product testing part
Speed, and by the speed data transmission to computer 10, speed data is converted into energy datum by computer 10, and should
Energy datum is transferred to display device 11, and shows.
Further, which further includes power supply 9, the power supply 9 be each accelerating coil 81, computer 10,
Display device 11 needs the component of electric energy to provide electric energy close to switch 12, speed detector 13 etc..
Further, each accelerating coil 81 is connect with an independent close switch 12, when jump bit 4 passes through
When each accelerating coil 81, what is connect with each accelerating coil 81 disconnects close to switch 12, and power supply 9 stops to the accelerating coil
81 power supplies, to save electricity.
Compared with prior art, the height of vertical mechanical shock test machine of the invention is easy to adjust, and is utilizing
It while gravitional force is converted into impact energy, is done work using electromagnetic force, so that jump bit is obtained bigger impact energy, overcome
The deficiency of existing vertical mechanical shock test machine meets the requirement that product tests big energy impact.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of vertical mechanical shock test machine in the prior art；
Fig. 2 is the schematic diagram of another vertical mechanical shock test in the prior art machine；
Fig. 3 is the schematic diagram of vertical mechanical shock test machine of the invention；
Fig. 4 is the sectional view of the jump bit in the present invention；
Fig. 5 is the schematic diagram of accelerating coil component in vertical mechanical shock test machine of the invention；
Appended drawing reference: 1- vertical arm, 2- transverse arm, 3- guide rod, 4- jump bit, 41- through-hole, 42- shell, 43- magnetisable material,
44- rear cover, 5- jump bit fixator, 6- shock testing machine, 7- product fixator, 8- accelerating coil component, 81- accelerating coil, 9- electricity
Source, 10- computer, 11- display device, the close switch of 12-, 13- speed detector.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out to technical solution of the present invention clear, complete, in detail
Description.Obviously, described embodiment is only a part in the numerous embodiments of the present invention, instead of all the embodiments.
Based on protection scope of the present invention, those skilled in the art make the present invention in the case where not making the creative labor
Any deformation technical solution, all within protection scope of the present invention.
A method of realizing that vertical impact test, this method are used for a kind of vertical mechanical shock test machine, such as Fig. 3
Shown, the vertical mechanical shock test machine is by 1, transverse arm 2 of vertical arm, guide rod 3, jump bit 4, jump bit fixator 5, punching
The part such as platform 6, product fixator 7 is hit to form；The vertical arm 1 is round bar shape, and both ends all have screw thread；The transverse arm 2 be also
Round bar shape, both ends offer threaded hole, and vertical arm 1 is two, and one end of two vertical arm 1 is screwed into two spiral shells of transverse arm 2 respectively
In pit；It is opened up on shock testing machine 6 there are two threaded hole, the other end of two vertical arm 1 is screwed into two screw threads on shock testing machine respectively
Kong Zhong；Guide rod 3 is round bar shape, is connected to the middle part of transverse arm 2, is arranged in parallel with perpendicular wall 1；Guide rod 3 can be welded on transverse arm 2
Middle part, the middle part of transverse arm 2 can also be fixed on by fastener；Needing to adjust jump bit 4 relative to product testing part
When height, two vertical arm 1 are screwed, increase two vertical arm 1, while needing to guarantee that 2 holding of transverse arm is horizontal；The jump bit 4 has
There is through-hole 41, guide rod 3 passes through through-hole 41, and jump bit 4 can be slided along the vertical direction of guide rod 3；Jump bit 4 passes through punching
Hammer fixator 5 is fixed on guide rod 3；The product fixator 7 is located on shock testing machine 6, does impact test for fixation
Product testing part；The lower end of guide rod 3 is located at the top of product fixator 7, and the two does not contact.
The jump bit fixator 5 is a screw, and 4 side of jump bit offers threaded hole, and the screw is screwed into jump bit 4
Threaded hole in, jump bit 4 is fixed on to the top of guide rod 3.
The jump bit 4 is made of shell 42, magnetisable material 43, rear cover 44；The impact portion of shell is divided into solid, and rear portion is
Hollow, hollow parts fill magnetisable material 43, are then enclosed magnetisable material 43 in shell 42 with rear cover 44.
The magnetisable material 43 is rare-earth magnetic substance, and the rare-earth magnetic substance is in powdered.When jump bit and product try
When testing part impact, jump bit and product testing part bear biggish vibration.Common magnetisable material be an entirety, material compared with
It is crisp, not impact resistance.The fracture when magnetisable material of globality is impacted in order to prevent influences magnetism, and the present invention is using powdered
Magnetisable material.When by impact endurance test shock, powdered magnetisable material can be avoided fracture, and can be according to the work of magnetic force
With adjusting the position of itself, keep magnetic force maximum.Meanwhile in order to further increase the magnetic force of magnetisable material, magnetisable material is preferably
The magnetisable material of rare earth.
The shock surface that the jump bit 4 is contacted with product testing part is convex surface or plane, preferably convex surface.When the impact
When face is convex surface, since contact surface is smaller, product testing part can be by bigger impact effect under identical condition.
In order to guarantee jump bit 4 with product testing part impact when avoid damage to, the jump bit 4 by shell 42 material
For metal, preferably steel or copper material, tensile strength 370MPa-550MPa, Rockwell hardness 58-62, case material
Tensile strength and the relationship of Rockwell hardness meet: tensile strength × Rockwell hardness value is more than or equal to 21500 and is less than or equal to
34000, preferably greater than or equal to 28000 and be less than or equal to 32000.When the tensile strength of case material and the product of Rockwell hardness are small
When 21500, the intensity of shell is not able to satisfy requirement when impact；When the tensile strength of case material and the product of Rockwell hardness are big
When 34000, shell can become fragile, and also be unfavorable for the raising of its intensity, not be able to satisfy requirement when impact.
The vertical mechanical shock test machine further includes accelerating coil component 8, and the accelerating coil component 8 includes multiple adds
Fast coil 81.After accelerating coil is powered, electromagnetic field is generated, magnetic force is generated to having magnetic jump bit, drives jump bit acting,
Bigger impact energy is generated on the basis of the gravitional force of jump bit is converted into kinetic energy, meets product testing part to compared with favourable opposition
Hit the demand of energy.
The vertical mechanical shock test machine further includes computer 10, display device 11, close to switch 12, speed detector
13.The speed detector 13 is mounted on shock testing machine 6, detection jump bit 4 contacted with product testing part before speed, and by institute
Speed data transmission is stated to computer 10, speed data is converted into energy datum by computer 10, and the energy datum is transmitted
To display device 11, and show.The display device 11 can be LCD display, light-emitting diode display, CRT monitor.
The vertical mechanical shock test machine further includes power supply 9, and the power supply 9 is accelerating coil 81, computer 10, display
Device 11 needs the component of electric energy to provide electric energy close to switch 12, speed detector 13 etc..
Each accelerating coil 81 is connect with an independent close switch 12, when jump bit 4 passes through each acceleration
When coil 81, what is connect with each accelerating coil 81 disconnects close to switch 12, and power supply 9 stops powering to the accelerating coil 81,
To save electricity.
A kind of method for realizing vertical impact test, comprising the following steps:
1) the product testing part for needing to carry out mechanical shock test is fixed on shock testing machine 6 using product fixator 7；
2) height of two vertical arm 1 is adjusted, and transverse arm 2 is made to be in horizontality；
3) the vertical mechanical shock test, machine powers on, and each accelerating coil 81 in accelerating coil component 8 produces
Raw electromagnetic field；
4) back-out screw jump bit 4 being fixed on guide rod 3, jump bit 4 moves downward under gravity, speed
It spends increasing；
5) after jump bit 4 enters accelerating coil component, under the action of gravity and electromagnetic force, speed is increasing, described
After jump bit 4 often passes through an accelerating coil, the connection of the accelerating coil and power supply that have been through is disconnected close to switch 12；
6) jump bit 4 reaches shock testing machine 6, impacts to product testing part, completes impact test.
In the step 5) and 6) further include following steps between: before jump bit 4 impacts product testing part, velocity measuring
Device 13 detects the speed of jump bit 4, and by the speed data transmission to computer 10, speed data is converted by computer 10
Energy datum, and the energy datum is transferred to display device 11, and show.
The height of vertical mechanical shock test machine of the invention is easy to adjust, and is being converted into punching using gravitional force
It while hitting energy, is done work using electromagnetic force, jump bit is made to obtain bigger impact energy, overcome existing vertical machinery punching
The deficiency for hitting testing machine meets the requirement that product tests big energy impact.
Claims (6)
1. a kind of method for realizing vertical impact test, this method is used for a kind of vertical mechanical shock test machine, described perpendicular
Straight mechanical shock test's part is by vertical arm (1), transverse arm (2), guide rod (3), jump bit (4), jump bit fixator (5), impact
The part such as platform (6), product fixator (7) forms；
The vertical arm (1) is round bar shape, and both ends all have screw thread；The transverse arm (2) is round bar shape, and both ends offer
Threaded hole, one end of two vertical arm (1) are screwed into respectively in two threaded holes of transverse arm (2)；Spiral shell there are two being opened up on shock testing machine (6)
Pit, the other end of two vertical arm (1) are screwed into respectively in two threaded holes on shock testing machine；
Guide rod (3) is round bar shape, is connected to the middle part of transverse arm (2), is arranged in parallel with perpendicular wall (1)；
The jump bit (4) has through-hole (41), and guide rod (3) passes through through-hole (41), and jump bit (4) can be along guide rod
(3) vertical direction sliding；Jump bit (4) is fixed on guide rod (3) by jump bit fixator (5)；The jump bit (4)
It is made of shell (42), magnetisable material (43), rear cover (44)；The impact portion of shell be divided into it is solid, rear portion be hollow, hollow parts
It fills magnetisable material (43), is then enclosed magnetisable material (43) in shell (42) with rear cover (44)；The magnetisable material (43)
For rare-earth magnetic substance, the rare-earth magnetic substance is in powdered；The jump bit (4) is metal by the material of shell (42),
Tensile strength is 370 MPa-550 MPa；The tensile strength of case material and the relationship of Rockwell hardness meet: tensile strength × Lip river
The value of family name's hardness is more than or equal to 21500 and is less than or equal to 34000；
The product fixator (7) is located on shock testing machine (6), for the fixed product testing part for doing impact test；Guide rod
(3) lower end is located at the top of product fixator (7), and the two does not contact；
It the described method comprises the following steps:
1) the product testing part for needing to carry out mechanical shock test is fixed on shock testing machine (6) using product fixator (7)；
2) height of two vertical arm (1) is adjusted, and transverse arm (2) is made to be in horizontality；
3) the vertical mechanical shock test, machine powers on, and each accelerating coil (81) in accelerating coil component (8) produces
Raw electromagnetic field；
4) back-out screw jump bit (4) being fixed on guide rod (3), jump bit (4) moves downward under gravity,
Speed is increasing；
5) after jump bit (4) enters accelerating coil component, under the action of gravity and electromagnetic force, speed is increasing, the punching
After hammer (4) often passes through an accelerating coil, the connection of the accelerating coil and power supply that have been through is disconnected close to switch (12)；
6) jump bit (4) reaches shock testing machine (6), impacts to product testing part, completes impact test.
2. a kind of method for realizing vertical impact test according to claim 1, in the step 5) and 6) between also
Including the following steps: before jump bit (4) impact product testing part, speed detector (13) detects the speed of jump bit (4), and
The speed data transmission is given computer (10), speed data is converted into energy datum by computer (10), and by the energy
Data are transferred to display device (11), and show.
3. according to claim 1 or 2 a kind of described in any item methods for realizing vertical impact test, wherein the jump bit
(4) shock surface contacted with product testing part is convex surface or plane.
4. a kind of method for realizing vertical impact test according to claim 3, which further includes accelerating
Coil block (8), the accelerating coil component (8) include multiple accelerating coils (81).
5. a kind of method for realizing vertical impact test according to claim 1 or 2, the shock machine further include
Power supply (9), the power supply (9) are that each accelerating coil (81) provide electric energy；Each accelerating coil (81) is only with one
Vertical connects close to switch (12), when jump bit (4) pass through each accelerating coil (81), even with each accelerating coil (81)
What is connect disconnects close to switch (12), and power supply (9) stops powering to the accelerating coil (81).
6. a kind of method for realizing vertical impact test according to claim 1, the shock machine further includes meter
Calculation machine (10), display device (11), close to switch (12), speed detector (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403610.XA CN107132136B (en) | 2017-06-01 | 2017-06-01 | A method of realizing vertical impact test |
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|---|---|---|---|
| CN201710403610.XA CN107132136B (en) | 2017-06-01 | 2017-06-01 | A method of realizing vertical impact test |
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| CN107132136B true CN107132136B (en) | 2019-09-03 |
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| CN107782618B (en) * | 2017-09-19 | 2019-12-31 | 中北大学 | Product tensile test mechanics experimental facilities |
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