CN117347197A - Adjustable electromagnetic force impact device and impact test method - Google Patents
Adjustable electromagnetic force impact device and impact test method Download PDFInfo
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- CN117347197A CN117347197A CN202311141458.4A CN202311141458A CN117347197A CN 117347197 A CN117347197 A CN 117347197A CN 202311141458 A CN202311141458 A CN 202311141458A CN 117347197 A CN117347197 A CN 117347197A
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- 238000009863 impact test Methods 0.000 title abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 80
- 230000003116 impacting effect Effects 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims 2
- 238000010998 test method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
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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
- G01N3/02—Details
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to an adjustable electromagnetic force impact device and an impact test method. The device comprises a base, wherein a plurality of test target boxes for mounting test pieces are arranged on the base, and the test target boxes are arranged on the base in pairs in opposite directions; and a plurality of emission parts for emitting impact load of a certain mass at a predetermined speed according to test setting and impacting test pieces mounted on the test target box, the emission parts being mounted back to back on the base in pairs. In the invention, the coils of the two groups of back-to-back transmitting parts are fed by the pulse power supply, so that armatures in the transmitting parts are pushed by electromagnetic force to impact the buffer plate, and impact energy is transferred to a test piece on the test target box.
Description
Technical Field
The invention relates to the field of pulse power coils, in particular to an adjustable electromagnetic force impact device and an impact test method.
Background
The electromagnetic emission technology has important functions in the fields of modern military, scientific research, aerospace emission and the like, and the electromagnetic emission technology has the advantages of safe and reliable energy source, large emission quality range, adjustable outlet speed and capability of being used for mechanical impact test.
The traditional drop hammer impact experimental equipment is simple and direct in principle, namely the drop hammer used for impact is lifted to a certain height, the drop hammer is controlled by the trigger device to fall along a fixed path, potential energy of the drop hammer is converted into kinetic energy, and the drop hammer is enabled to impact a tested sample at a relatively stable speed. The traditional drop hammer experiment has the following problems:
1) One drop hammer tester is often configured with only one drop hammer, so that one instrument can only perform impact test on one sample during test, and the test efficiency is too low.
2) The drop hammer experiment machine converts potential energy of drop hammers into kinetic energy to obtain an initial-speed impact tested sample, the initial-speed impact tested sample is limited by the use of the instrument, if the required kinetic energy is large, the drop hammers with large mass are required to be adopted, and the drop hammers are required to be lifted to be high, so that the equipment is large in size and poor in flexibility.
The existing drop hammer impact testing machine is difficult to solve the problems, and an improved method is needed to improve the experimental efficiency, reduce the equipment volume and improve the flexibility of the device.
Disclosure of Invention
In order to solve the above problems, an adjustable electromagnetic force impact device and an impact test method are provided, which aim to feed a transmitting coil through a pulse power supply so as to drive impact load to impact a sample by using electromagnetic force generated by the coil.
The specific technical scheme is as follows:
a first aspect of the present invention provides an adjustable electromagnetic force impact device comprising:
the base is provided with a plurality of test target boxes for mounting test pieces, and the test target boxes are arranged on the base in pairs in opposite directions; and
and the plurality of transmitting parts are used for transmitting impact load with certain mass at a preset speed according to test setting and impacting test pieces hung on the test target box, and the transmitting parts are installed on the base back to back in pairs.
Specifically, the base is provided with the supporting device and the fixing device, the fixing device is fixed on the central line of the base, the transmitting parts are arranged on the left side and the right side of the fixing device back to back in pairs, the supporting device is symmetrically and oppositely fixed on the two sides of the fixing device by taking the fixing device as a center, the test target box is arranged on the supporting device, the test target box is oppositely arranged at the left end and the right end of the base in pairs, the back-to-back transmitting parts on the two sides of the test target box and the fixing device at the left end and the right end are positioned on a transmitting axis, and the outlet direction axis of each transmitting part is opposite to a mounted test piece on the test target box.
Specifically, the fixing device is an insulator with certain thickness and strength.
Specifically, the supporting device is a solid support with certain strength.
Specifically, the test target box comprises a mounting frame fixed on the supporting device and a buffer plate detachably arranged on the mounting frame so as to tightly press the test piece on the mounting frame.
Specifically, the transmitting part comprises a transmitting coil, a guide cylinder and an armature, wherein the transmitting coil is symmetrically arranged on the left side and the right side of the fixing device back to back, the armature and impact load are positioned in the coil and the guide cylinder, the two ends of a joint of the transmitting coil are electrically connected through a feed circuit, and the joints of the transmitting coils adjacent back to back are fed in parallel.
Specifically, the impact load comprises an insulating buffer block, a balancing weight and a connecting rod, and the connecting rod is arranged on the insulating buffer block and the balancing weight in a penetrating mode.
Specifically, the end of the impact load connecting rod, which is close to the test target box, can be used as an impact head.
Specifically, a mounting groove is formed in the side wall of one side, facing the fixing device, of the mounting frame.
A second aspect of the present invention provides an impact test method using the above-mentioned adjustable electromagnetic force impact device, comprising the steps of:
the test piece is hung on the mounting frame through the buffer plate;
the armature and impact load are sequentially loaded in the transmitting coil and the guide cylinder from inside to outside;
energizing the transmitting coil according to the test design, so that the armature ejects impact load under the action of electromagnetic thrust at a certain speed and kinetic energy and impacts the buffer plate, and impact energy of impact is transmitted to the test piece through the buffer plate;
the voltage amplitude and impact load quality of the pulse power supply are regulated, the impact speed and energy can be regulated, and the impact test is repeated.
The thickness and the material of the buffer plate are changed to adjust the amplitude value and the pulse steepness of the impact stress on the test piece.
The beneficial effect of above-mentioned scheme is:
1) According to the invention, the pulse power supply is used for feeding power to the emitting coils at two sides, so that the impact load is pushed to impact the buffer plate through electromagnetic force generated by the coils, and impact energy is transferred to the test piece;
2) The adjustable electromagnetic force impact device provided by the invention can realize simultaneous impact of multiple samples through expansion;
3) Compared with a drop hammer experimental device, the impact device provided by the invention has the advantages that the volume is greatly reduced, the experimental efficiency is obviously improved, and the impact condition is easier to adjust.
4) The test device is designed symmetrically back to back through the transmitting part, the same coil is ignited simultaneously, and strong backseat force counteraction is realized when the coil is transmitted, so that the whole device is convenient to fix and install, and movable arrangement of the platform is easier to realize.
Drawings
FIG. 1 is a schematic view of an impact device provided in an embodiment of the present invention;
fig. 2 is a partial enlarged view of a corresponding portion of the letter a in fig. 1;
fig. 3 is an assembly schematic of a transmitting portion and an impact load provided in an embodiment of the present invention.
In the accompanying drawings: 1. a base; 2. a fixing device; 3. a support device; 4. a mounting frame, 5, a buffer plate; 6. a transmitting coil; 7. a guide cylinder; 8. a buffer block; 9. balancing weight; 10. an impact head; 11. and (3) a screw.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1 and 2, the impact device provided in the embodiment of the present invention includes: the base 1, the base 1 is provided with a plurality of test target boxes for mounting test pieces, and the test target boxes are arranged on the base 1 in pairs in opposite directions; and a plurality of emission parts for emitting impact load of a certain mass at a predetermined speed according to test setting and impacting the test piece mounted on the test target box, the emission parts being mounted back to back on the base 1 in pairs.
In the invention, the test piece is firstly hung on the test target box, then the impact load is emitted at a preset speed by the emission part, and the impact is carried out on the test piece hung on the test target box, so that the impact test is carried out.
Specifically, in the invention, a fixing device 2 and a supporting device 3 (which are solid supports with certain strength) are arranged on a base 1, the fixing device 2 is fixed on the central line of the base 1, the supporting device 3 is symmetrically and oppositely fixed on two sides of the fixing device 2 by taking the fixing device 2 as a center, the left and right adjacent test target boxes are positioned on one emission axis, the test target boxes are oppositely arranged on the supporting device 3 in pairs, the emission parts are arranged on the left and right sides of the fixing device 2 in pairs back to back, and the axis of each emission part is opposite to a mounted test piece on the test target box. As shown in FIG. 1, according to the invention, the test target boxes on which test pieces are mounted are fixed on the fixing device 2 in pairs, and then impact tests are carried out by utilizing the corresponding emitting parts, so that the use requirement of the simultaneous impact tests of multiple samples is met.
Specifically, the test target box comprises a mounting frame 4 and a buffer plate 5 detachably arranged on the mounting frame 4 so as to press a test piece on the mounting frame 4. As shown in fig. 1 and 2, the mounting rack 4 of the present invention is provided with a mounting groove, when in use, a test piece can be placed in the mounting groove first, then the buffer plate 5 is inserted into the mounting groove, and then the buffer plate 5 is locked and fixed (as shown in fig. 2, in the present invention, it is recommended to sequentially abut the buffer plate 5 and the test piece on the mounting rack 4 by using the screw 11 screwed on the mounting rack 4), so as to abut and mount the test piece on the mounting rack 4 by means of the buffer plate 5. In order to further cooperate with the buffer plate 5 to press and mount the test piece, a mounting groove (not shown in the figure) may be formed on the side wall of the mounting frame 4 facing the fixing device 2.
Specifically, the transmitting part comprises a transmitting coil 6, a guide cylinder 7 and an armature 12, wherein the transmitting coil 6 is arranged on the left side and the right side of the fixing device in pairs, the guide cylinder 7 is arranged at one end of the transmitting coil 6 close to the test target box, the armature 12 is arranged in the transmitting coil 6 and the guide cylinder 7, the two ends of a joint of the transmitting coil 6 are electrically connected through a feed cable, and the joints of the transmitting coils adjacent back to back are fed in parallel. In the invention, when the armature 12 and the impact load are loaded from inside to outside in sequence, the pulse power supply feeds power to the emitting coils at the two sides, the coils generate electromagnetic force and push the impact load to be emitted from the guide cylinder 7 and impact the buffer plate 5, so that impact energy is transmitted to a test piece for impact test (the armature 12 is decelerated due to the reverse dragging force after the impact load is stamped from the guide cylinder 7, so that the armature is separated from the impact load). In the test mode, the impact speed can be adjusted in a larger range by adjusting the amplitude of the pulse power supply. In the test, in order to prevent the mutual interference of the transmitting coils 6 in the two adjacent transmitting parts, the fixing device 2 is of an insulator structure with certain thickness and strength; meanwhile, in order to stably mount the fixture 2 and the test target box, relative displacement or shaking is prevented during the test, so that the base 1 is a solid structure having a certain strength.
Specifically, the impact load in the invention comprises a buffer block 8, a balancing weight 9 and a connecting rod, wherein the connecting rod penetrates through the buffer block 8 and the balancing weight 9, one end of the connecting rod can be used as an impact head 10, in the invention, after the power is fed by a transmitting coil, an armature 12 is ejected and acts on the buffer block 8 (made of elastic materials and prevents the tail of the load from being impacted by the armature 12 to generate deformation), and then the impact load is ejected and impacts a buffer plate 5 by the impact head 10, so that the impact test is performed. According to the invention, the impact load mass can be adjusted by replacing the balancing weights 9 with different masses, so that the impact speed and the impact energy can be adjusted in a larger range by matching with the amplitude of the pulse power supply.
The impact test method using the impact device comprises the following steps:
the test piece is hung on the mounting frame 4 through the buffer plate 5;
the armature 12 and the impact load are sequentially loaded in the transmitting coil and the guide cylinder 7 from inside to outside;
the transmitting coil is energized according to the test design so that the armature 12 ejects the impact load at a certain speed and kinetic energy under the action of electromagnetic thrust and impacts the buffer plate 5 to transmit the impact energy of the impact to the test piece through the buffer plate 5.
It should be noted that, in the invention, the impact speed and the energy can be adjusted by adjusting the voltage amplitude and the impact load quality of the pulse power supply; or the thickness and the material of the buffer plate are changed to adjust the amplitude value and the pulse steepness of the impact stress on the test piece.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. An adjustable electromagnetic force impact device, comprising:
the base is provided with a plurality of test target boxes for mounting test pieces, and the test target boxes are arranged on the base in pairs in opposite directions; and
and the emission parts are used for emitting impact load with certain mass at a preset speed according to test setting and impacting test pieces hung on the test target box, and the emission parts are installed on the base back to back in pairs.
2. The adjustable electromagnetic force impact device according to claim 1, wherein the base is provided with a supporting device and a fixing device, the fixing device is fixed on a central line of the base, the transmitting parts are arranged on the left side and the right side of the fixing device in pairs back to back, the supporting device is symmetrically and oppositely fixed on the two sides of the fixing device by taking the fixing device as a center, the test target box is arranged on the supporting device, the test target box is oppositely arranged on the left end and the right end of the base in pairs, the back-to-back transmitting parts on the two sides of the test target box and the fixing device on the left end and the right end are positioned on a transmitting axis, and the outlet direction axis of each transmitting part is opposite to a mounted test piece on the test target box.
3. The adjustable electromagnetic impact device of claim 2, wherein the securing device is an insulator having a thickness and strength.
4. The adjustable electromagnetic impact device of claim 2, wherein the support means is a solid support having a strength.
5. The adjustable electromagnetic force impact device of claim 2, wherein the test target case includes a mount for securing to the support device, a buffer plate removably mounted to the mount for compressing the test piece against the mount.
6. The adjustable electromagnetic force impact device according to claim 5, wherein the transmitting portion includes a transmitting coil, a guide cylinder and an armature, the transmitting coil is symmetrically installed back-to-back on the left and right sides of the fixing device, the armature and the impact load are located in the coil and the guide cylinder, both ends of the connector of the transmitting coil are electrically connected through a feeding circuit, and the connectors of the transmitting coils adjacent back-to-back are fed in parallel.
7. The adjustable electromagnetic force impact device of claim 5 or 6, wherein the impact load comprises an insulating buffer block, a weight block and a connecting rod, the connecting rod being threaded on the insulating buffer block and the weight block.
8. The adjustable electromagnetic impact device of claim 7, wherein an end of the impact loaded connecting rod proximate the test target box acts as an impact head.
9. The adjustable electromagnetic impact device according to claim 7, wherein a mounting groove is formed in a side wall of the mounting frame facing the fixing device.
10. A shock test method using the adjustable electromagnetic force shock device according to any one of claims 5 to 9, comprising the steps of:
the test piece is hung on the mounting frame through the buffer plate;
the armature and impact load are sequentially loaded in the transmitting coil and the guide cylinder from inside to outside;
energizing the transmitting coil according to the test design, so that the armature emits impact load under the action of electromagnetic thrust at a certain speed and kinetic energy and impacts the buffer plate, and impact energy of impact is transmitted to the test piece through the buffer plate;
the voltage amplitude and impact load mass of the pulse power supply are regulated to regulate the impact mass and impact speed of the load;
the thickness and the material of the buffer plate are changed to adjust the amplitude value and the pulse steepness of the impact stress on the test piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311141458.4A CN117347197A (en) | 2023-09-05 | 2023-09-05 | Adjustable electromagnetic force impact device and impact test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311141458.4A CN117347197A (en) | 2023-09-05 | 2023-09-05 | Adjustable electromagnetic force impact device and impact test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117347197A true CN117347197A (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311141458.4A Pending CN117347197A (en) | 2023-09-05 | 2023-09-05 | Adjustable electromagnetic force impact device and impact test method |
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| Country | Link |
|---|---|
| CN (1) | CN117347197A (en) |
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2023
- 2023-09-05 CN CN202311141458.4A patent/CN117347197A/en active Pending
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