CN104502207A - Energy storage and resetting device of drop hammer testing machine - Google Patents
Energy storage and resetting device of drop hammer testing machine Download PDFInfo
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- CN104502207A CN104502207A CN201510004805.8A CN201510004805A CN104502207A CN 104502207 A CN104502207 A CN 104502207A CN 201510004805 A CN201510004805 A CN 201510004805A CN 104502207 A CN104502207 A CN 104502207A
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Abstract
The invention discloses an energy storage and resetting device of a drop hammer testing machine. The energy storage and resetting device comprises an electromagnetic induction and driving device, a drop hammer lifting and resetting device and a drop hammer impacting device. Compared with a traditional drop hammer testing machine, the energy storage device of the drop hammer testing machine can be used for controlling dropping impact energy of a drop hammer through discharging voltage, and the continuous change of drop hammer impact energy can be realized. The dropping impact energy is improved through increasing the discharging voltage; and under the conditions that drop hammer counter weights are the same and the dropping heights are the same, the impact energy higher than that when a traditional drop hammer machine is adopted can be provided.
Description
Technical field
The present invention relates to a kind of drop hammer tester, particularly relating to a kind of energy storage and resetting means of the landing impact testing machine based on electromagnetic induction technology, for measuring material property.
Background technology
In the fields such as machinery, metal material, often there is a lot of new construction, a quality that new material needs to know its shock resistance.Drop hammer tester is generally used for the impact resistance of testing product, and the mechanical characteristic of research product under high-speed impact, has important directive function to the application of product in real life.During test, generally sample to be detected being fixed on below dropping hammer, rising to certain height by dropping hammer, then through free-falling stage impact specimen, observe impact process and impact the result that sample is produced.Generally, test the deformation extent after being hit and can reflect its shock resistance.
Tradition falling tup machine equipment mainly comprises fixed support, promptly structure, drops hammer, motor and electronic-controlled installation test time, electronic-controlled installation controls motor provides power to make this promptly hanger of promptly dropping hammer of structure bites, and by this drop hammer lifting to one preset height, after manually sample being positioned over this below of dropping hammer, electronic-controlled installation controls motor provides power that promptly structure is opened, and makes the free-falling impact specimen that drops hammer.But when traditional drop hammer tester impacts sample, its energy storage mode mainly relies on the quality of self counterweight and the height risen that drops hammer, and has significant limitation.As, when impact energy for impulse test requires high, tradition drop hammer tester is mainly through increasing the quality of dropping hammer and hoisting depth carrys out stores impact energy, impact energy when dropping hammer is increased with this, but, the height increased when dropping hammer free-falling is then subject to the limitation of equipment parking space position and topology layout own, and increase height that often can not be too much, this just causes traditional falling tup machine impact energy can not be enough large.But, for this problem, some equipment adopt the mode of spring energy-storage to increase the energy of impact specimen, as the falling tup machine in patent application numbers 201120501756.6 and 200910061645.5, if increase impact energy, then need to promote the height dropped hammer, the and for example falling tup machine INSTRON dynatup of Instron Corporation, it can only provide at most the impact energy of 900J, but, the mode of this spring energy-storage belongs to passive type, the energy of impact can be increased to a certain extent, but when the experiment of the larger impact energy of ask for something, then there is deficiency.
Electromagnetic induction principle is that the electric current that discharge coil passes through to change produces induced field, and metal is under the effect of induced field, and the interphase interaction of meeting and discharge coil, can be subject to powerful electromagnetic force.Utilize magnetic field force, by different the way of restraint, the bulging of metal, welding, riveted joint, necking down and the driving etc. to other metals can be realized.Owing to being utilize electromagnetic force to act on conducting metal, therefore not needing in conducting metal loading process that power transmission medium, efficiency are high, the discharge energy of discharge coil is easy to control.The key character of electromagnetic induction is exactly that the fault offset time is short, and inertial force is playing a major role, and workpiece can reach 50m/s-300m/s by electromagnetic force instant movement speed, from being subject to the large and speed high this point of electromagnetic force, be similar to instant of detonation.When utilizing the copper coin etc. of electromagnetic induction principle to good conductivity to act on, the effect of powerful electromagnetic force is subject in the copper coin short time, outside generation plastic yield, if copper coin is not when being subject to kinematic constraint, can move at a terrific speed, form powerful driving force, the powerful electromagnetic force relying on it to be subject to, can be used for driving other objects.Therefore, electromagnetic induction can be applied to the various fields such as machinery, aviation.
Because electromagnetic induction can provide powerful electromagnetic force, can realize the bulging of metal, necking down and the driving etc. to metal, this ability of driving force that electromagnetic induction therefore can be utilized to provide powerful, is applied to the aspects such as the driving of dropping hammer in drop hammer tester.
In sum, in order to solve the problem of the above-mentioned traditional falling tup machine impact energy deficiency mentioned, and traditional falling tup machine improves the shortcoming of drop impact energy by the mode improving height of the fall and spring energy-storage, utilize the advantage of electromagnetic induction principle, propose a kind of energy storage mode and device of falling tup machine of convenience and high-efficiency.
Summary of the invention
The object of this invention is to provide a kind of energy storage and resetting means of drop hammer tester, a kind of drop hammer tester utilizing electromagnetic induction technology, for the problem solving traditional drop hammer tester impact energy deficiency provides new method, avoid dropping hammer quality by promoting and highly increasing the problems such as insufficient space that impact energy brings, utilize electromagnetic induction principle, the size of drop impact energy is accurately controlled by changing sparking voltage, very high impact energy can be provided for dropping hammer, it is a kind of compact conformation, efficiently, the energy storage device of the drop hammer tester of HI high impact energy.
Technical scheme of the present invention there is provided a kind of drop hammer tester energy storage and resetting means, and it comprises electromagnetic induction and drive unit, drop hammer lifting and resetting means, drop impact device, it is characterized in that:
Electromagnetic induction and drive unit comprise alternating source, step-up transformer, electric capacity, switch, rectifier, coil, driving chip, wherein, alternating voltage raises by step-up transformer, voltage commutation after rising is to capacitor charging after DC voltage by rectifier, when the switch is closed, electric capacity discharges to coil and produces induced field, under induced field effect, the driving chip arranged below coil produces secondary induction electric current, the secondary induction electric current of change produces secondary induction magnetic field around driving chip, the electromagnetic force of coil is in driving chip, driving chip moves downward and acts on and drops hammer,
Drop hammer lifting and resetting means comprise T-shaped reference column, reset buffer spring and drag-line, wherein, T-shaped reference column is stairstepping, upper end is connected with coil flange with support by set bolt, lower end penetrates driving chip, insert the inside of reset buffer spring and be connected with the sheet metal bottom reset buffer spring, reset buffer spring upper end is connected with driving chip, and wherein sheet metal is fixed on support; Drag-line is connected respectively by the fixed pulley of pedestal upper end and drops hammer and traction electric machine, and traction electric machine is fixed on the bottom of support, and when carrying out falling weight impact test, traction electric machine pulls drag-line, and drag-line is drawn high by fixed pulley and drops hammer;
Drop impact device comprises guide pole, drops hammer, balancing weight, tup, and wherein, tup is arranged on bottom of dropping hammer, and have some balancing weights in dropping hammer, drop hammer insertion guide pole, by the positioning and guiding of guide pole.
Further, coil is rack-mount, and four equally distributed set bolts penetrate coil flange periphery and support and T-shaped reference column.
Further, driving chip is manufactured by copper coin, and four end points of driving chip have four through holes, and the lower end of T-shaped reference column is inserted wherein.
Further, metal weights block has two grooves, and inner axial Metallic rod of dropping hammer embeds in groove, and then in metal weights block being arranged on drop hammer.
Further, the upper and lower two ends of guide pole are inserted in falling tup machine support, and driving chip is connected with reset buffer spring, when carrying out the impulse test of dropping hammer, is cushioned after driving chip drives dropping hammer by reset buffer spring.
Further, drag-line connects traction electric machine and drops hammer, and when carrying out falling weight impact test, by traction, drag-line draws high the position of presetting by dropping hammer.
Present invention also offers a kind of method utilizing described drop hammer tester energy storage and resetting system to carry out impulse test, it is characterized in that:
Step 1, place test specimen to be tested on chopping block;
Step 2, the impact energy experimentally required, drop hammer lifting directly extremely maybe can be pulled up to the position with driving chip connection by drag-line in midair by dropping hammer;
Step 3, alternating source are boosted by step-up transformer;
Electric current after step 4, boosting transformation is by after rectifier, and become direct current, DC voltage is to capacitor charging;
Step 5, closed circuit switch, make capacitor discharge;
Induction current in step 6, driving chip produces secondary induction magnetic field, in the space of the induced field that secondary induction magnetic field and coil produce between coil and driving chip, driving chip is subject to electromagnetic force, and drive and drop hammer and move downward, now, traction electric machine stops traction, and drag-line is in relaxation state;
Step 7, driving chip depart from dropping hammer after driving is dropped hammer, and upwards rebound, and under the effect of T-shaped reference column, driving chip returns to the position before driving;
Step 8, drop hammer and the test specimen being placed on chopping block clashed into and completes impulse test;
Step 9, complete impulse test after, drive motor traction cable, making to drop hammer upwards promotes, and returns to its initial position
Beneficial effect of the present invention is:
(1) compared with traditional breaker, because difference increases the impact energy of dropping hammer by increasing the height dropped hammer, so testing machine involved in the present invention, it takes up room less, and the structure material of falling tup machine is less, and structure is compact efficient more.
(2) compared with traditional drop hammer tester, owing to adopting electromagnetic induction technology, driving chip moved electromagnetic force to drive and dropped hammer, and by changing sparking voltage, accurately can control the size of driving-energy, accurately can control drop impact energy.
(3) compared with traditional drop hammer tester, the energy storage device of drop hammer tester involved in the present invention, because its size by sparking voltage controls the impact energy fallen of dropping hammer, can realize continuously changing of drop impact energy.Can by increase sparking voltage, promote drop impact energy, when counterweight of dropping hammer identical identical with height of drop, the impact energy higher than traditional falling tup machine can be provided.
Accompanying drawing explanation
Figure 1 shows that drop hammer tester schematic diagram;
Figure 2 shows that drop hammer tester drops hammer schematic diagram after pull-up;
Figure 3 shows that the partial sectional view of drop hammer tester energy storage device;
Wherein: 1-alternating source 2-step-up transformer 3-electric capacity 4-switch 5-rectifier 6-resistance 7-coil 8-T shape reference column 9-reset buffer spring 10-driving chip 11-guide pole 12-support 13-drops hammer 14-balancing weight 15-tup 16-drag-line 17-chopping block 18-set bolt.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described and is described.
If Fig. 1 is drop hammer tester energy storage of the present invention and resetting system general illustration, it comprises electromagnetic induction and drive unit, drop hammer lifting and resetting means, drop impact device.
Wherein electromagnetic induction and drive unit form by with lower component: alternating source 1, step-up transformer 2, electric capacity 3, switch 4, rectifier 5, resistance 6, coil 7, driving chip 10, set bolt 18.
Drop hammer lifting and resetting means form by with lower component: T-shaped reference column 8, reset buffer spring 9, drag-line 16 etc.
Drop impact device forms primarily of with lower component: guide pole 11, drop hammer 13, balancing weight 14, tup 15.
Concrete, electromagnetic induction and drive unit are as shown in figures 1 and 3, coil 7 is fixed on falling tup machine top-support 12, four equally distributed set bolts 18 penetrate coil 7 flange periphery and support 12 is inner with T-shaped reference column 8, make the flange periphery of coil 7 and T-shaped reference column 8 by four set bolt 18 compact siro spinning technology, being close to below with coil 7 is driving chip 10, is separated by between the two by the insulation course of discharge coil 7.Wherein, driving chip 10 is manufactured by the copper coin conducted electricity very well etc. and forms, coil 7 adopts 5mm × 7mm rectangle red copper wire to carry out spiral winding, insulating tape is adopted to isolate between copper cash, epoxy resin and coagulating agent is filled outside copper cash, ratio is 1:2 mixing, solidifies rear outer rim turnery processing to the size needed.Four end points of driving chip 10 have four through holes, and the lower end of T-shaped reference column 8 can be inserted into, when driving chip 10 moves, can carry out axial guiding and location to it.Electromagnetic induction and the drive unit course of work as follows: the voltage 380V of industrial alternating source 1 is elevated to more than 2000V by step-up transformer 2, voltage commutation after rising is DC voltage by rectifier 5, in the effect charge circuit of resistance 6, electric current reduces, DC voltage is charged to electric capacity 3, completes live part.When switch 4 closed moment, electric capacity 3 pairs of coils 7 discharge, and complete discharge portion.Coil 7 is subject to the electric current of acute variation, produces induced field, and due to the change of induced field, produces secondary induction electric current to driving chip 10 inside, and the secondary induction electric current of change produces again secondary induction magnetic field around driving chip 10.In the induced field that coil 7 produces and the secondary induction magnetic field that driving chip 10 the produces space between coil 7 and driving chip 10, magnetic induction line direction is consistent, produce powerful electromagnetic force, driving chip 10 is subject to powerful electromagnetic force, 13 to drive, making it to impact downwards with very high kinetic energy to dropping hammer.
Concrete, drop hammer lifting and resetting means as shown in Figure 1, Figure 2 and Figure 3, wherein T-shaped reference column 8 is in stairstepping, upper end is connected with coil 7 flange with support 12 by four set bolts 18 at four end points places, and its lower end penetrates driving chip 10, inserts the inside of reset buffer spring 9, weld together with the sheet metal of spring bottom, play the effect of axial limiting guiding when driving chip 10 moves, T-shaped reference column 8, due to its shape T-shaped face, can move upward by Constraints driven sheet 10.Four end points places of four reset buffer spring 9 upper ends and driving chip 10 connect by being weldingly connected, and lower end and sheet metal connect by being weldingly connected, and wherein sheet metal is fixed on support 12, as shown in Figure 3 concrete.Reset buffer spring 9 plays the constraint fixation of position together with T-shaped reference column to driving chip 10, make it before motion and can return to same position after motion.Drag-line 16 connects by the fixed pulley of support 12 upper end drop hammer 13 and traction electric machine respectively, traction electric machine is fixed on the bottom of support 12, when carrying out falling weight impact test, traction electric machine pulls drag-line 16, drag-line 16 is drawn high by fixed pulley and drops hammer 13, by traction, and experimentally requirement, drag-line 16 by drop hammer 13 and tup 15 draw high suitable position, its change procedure is as depicted in figs. 1 and 2.Drag-line 16 will drop hammer 13 draw high after, by keep drop hammer 13 locus motionless, while discharge coil 7 discharges, traction electric machine stops traction cable 16, makes to drop hammer 13 to be in of short duration vacant state, because coil 7 is extremely short for discharge time, driving chip 10 is also extremely short by electromagnetic force process, can ensure to drop hammer 13 like this while not being in vacant state by drag-line 16 traction, driving chip 13 to drive dropping hammer, and makes it to move downward.After 13 impacts downwards of dropping hammer, driving chip 10 is subject to the effect of reset buffer spring 9 and T-shaped reference column, gets back to original position, and traction electric machine traction cable 16 again, by traction, make to drop hammer and 13 upwards to use, get back to initial position, for corresponding preparation is carried out in falling weight impact test next time.
Concrete, as shown in figures 1 and 3, tup 15 is threaded connection to be arranged on and drops hammer bottom 13 drop impact device, and the shape and size of tup 15 can be determined according to concrete requirement of experiment, can freely dismantle.Drop hammer 13 with driving chip 10 joint, drop hammer in 13 and have several metal weights blocks 14, metal weights block 14 has two grooves, is embedded in groove by the metal thin bar of the axis of 13 inside of dropping hammer, in metal weights block 14 being arranged on drop hammer.By the number of adjustment balancing weight 14, the impact energy of dropping hammer when impacting can be adjusted downwards.Whole drop hammer 13 four end points places insert guide poles 11, by the positioning and guiding of guide pole 11, making to drop hammer 13 can remain horizontal level when moving up and down.Guide pole 11 keeps vertical, and its upper and lower two ends are inserted in falling tup machine support 12.Driving chip 10 is connected with reset buffer spring 9, when carrying out the impulse test of dropping hammer, is cushioned after driving chip 10 drives dropping hammer by reset buffer spring 9, in order to avoid damage driving chip 10, and makes driving chip 10 get back to original position after impact terminates.Drag-line 16 connects traction electric machine and drop hammer 13, and when carrying out falling weight impact test, by traction, drag-line 16 13 draws high suitable position by dropping hammer, and its change procedure as depicted in figs. 1 and 2.The bottom of testing machine is provided with chopping block 17, and during for testing, test specimen lays.
When carrying out impulse test with above-mentioned falling tup machine, its process comprises the following steps:
Step 1, place test specimen to be tested on chopping block 17, experimentally need, fix accordingly.
Step 2, the impact energy experimentally required, drag-line 16 can directly 13 be promoted to by dropping hammer and maybe 13 is pulled up to the position with driving chip connection by dropping hammer in midair;
The impact energy experimentally required, when impact energy is less, drag-line 16 can directly 13 to be promoted to dropping hammer in midair and without the need to using Electromagnetic Drive, and when requirement of experiment impact energy is larger, then drag-line 16 13 is pulled up to the position with driving chip 10 joint by dropping hammer.
Step 3, alternating source are boosted by step-up transformer 2;
Alternating source 1 is boosted by step-up transformer 2, the difference of the impact energy experimentally required, step-up transformer 2 is also different, and the voltage after boosting is also corresponding different.
Electric current after step 4, boosting transformation is by after rectifier, and become direct current, DC voltage is to capacitor charging;
After boosting transformation, electric current, by after rectifier 5, becomes direct current, and in the effect charge circuit of resistance 6, electric current reduces, and DC voltage is charged to electric capacity 3, completes live part.
Step 5, closed circuit switch 4, make electric capacity 3 discharge.
Due to curent change violent in inductive coil 7, produce induced field, and induced field is to driving chip 10 generation effect, makes to produce induction current in driving chip 10.
Induction current in step 6, driving chip produces secondary induction magnetic field, in the space of the induced field that secondary induction magnetic field and coil produce between coil and driving chip, driving chip is subject to electromagnetic force, and drive to drop hammer and 13 to move downward, now, traction electric machine stops traction, and drag-line 16 is in relaxation state;
In this step, the induction current in driving chip 10 can produce secondary induction magnetic field again.In the space of the induced field that secondary induction magnetic field and coil 7 produce between coil 7 and driving chip 10, because magnetic induction line direction is identical, produce very large magnetic field pressure.Driving chip 10 is subject to powerful electromagnetic force, and simultaneously traction electric machine stops traction, and drag-line 16 is in relaxation state, drops hammer 13 to be in vacant state.Now, driving chip 10 is subject to powerful electromagnetic force and drives to drop hammer 13 moving downward.
Step 7, driving chip driving drop hammer after 13 with drop hammer 13 disengagings, and upwards rebound, under the effect of T-shaped reference column 8, driving chip returns to the position before driving;
As shown in Figure 3, be subject to the effect of powerful electromagnetic force, driving chip 10 drives the 13 downward rapid movements that drop hammer, owing to being subject to the effect of reset buffer spring 9, driving chip 10 is meeting and 13 disengagings of dropping hammer after a segment distance is dropped hammer in driving, and upwards rebound gradually, owing to being subject to the effect of T-shaped reference column 8, driving chip 10 finally can return to the position before driving.
Step 8, drop hammer and 13 the test specimen being placed on chopping block 17 clashed into and completes impulse test;
In this step, drop hammer 13 after the driving being subject to driving chip 10, downward rapid movement, owing to being subject to the impact of gravity, before the test specimen being placed on chopping block 17 is clashed into, drop hammer 13 impact energy reach maximal value, and test specimen to be clashed into, completes impulse test.
Step 9, complete impulse test after, drive motor traction cable 16, making to drop hammer 13 upwards promotes, and returns to original position, with driving chip 10 joint.For falling weight impact test is ready next time.
In the present embodiment, if impulse test requires that impact velocity reaches 20m/s, then traditional drop hammer tester then will by drop hammer lifting to the height of 20m.The present invention then needs impulse sparkover voltage under suitable voltage, by the effect of coil 7, driving chip 10 is made to be subject to powerful electromagnetic force, driving is dropped hammer 13 sharp downward movement, its initial velocity can be increased to 15m/s, reach identical final impact velocity 20m/s, then the height of drop that only need drop hammer is about 9m, greatly reduces the height of drop that drops hammer.In addition, in identical height of drop situation of dropping hammer, compare with traditional falling tup machine, also can increase substantially the impact energy of falling tup machine.
In the drop hammer tester provided in the present embodiment, tup part wherein, can change the shape of tup according to concrete requirement of experiment, bottom chopping block also can determine shape and fixed form according to actual conditions.Different with the requirement of impact velocity to energy according to impulse test, the balancing weight of different quality and the different height of drops that drops hammer can be selected, and when higher impulse test requires for impact energy and impact velocity, then utilize electromagnetic force, driven by driving chip and drop hammer, make can obtain larger impact energy and speed during drop impact.
Utilize electro-magnetic forming principle, use drop hammer tester provided by the invention, can be different according to the requirement of impact energy size, the size changing sparking voltage controls impact energy, the size of impact energy can be continuously changed, compare traditional falling tup machine, provide the rank of impact energy more, more can carry out the impact experiment of high-energy and high speed.Because traditional falling tup machine promotes impact energy and impact velocity by increasing counterweight and increasing the height fallen that drops hammer, so falling tup machine provided by the present invention can under the prerequisite increasing considerably impact energy and speed, do not increase the height dropping hammer and, structure is more closely light, space hold is little, more safe and reliable, test specification is wider.
It is pointed out that the above, be only specific embodiment of the invention example, the data used in example and chart are only for illustration of the concrete thought of this method.For a person skilled in the art, within the spirit and principles in the present invention all, the change that can expect easily or equal replacement, improvement etc., all should be included within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (7)
1. the energy storage of drop hammer tester and a resetting means, it comprises electromagnetic induction and drive unit, drop hammer lifting and resetting means, drop impact device, it is characterized in that:
Electromagnetic induction and drive unit comprise alternating source (1), step-up transformer (2), capacitance (3), switch (4), rectifier (5), coil (7), driving chip (10), wherein, alternating voltage raises by step-up transformer (2), voltage commutation after rising is charge to electric capacity (3) after DC voltage by rectifier (5), when switch (4) is closed, electric capacity (3) discharges to coil (7) and produces induced field, under induced field effect, the driving chip (10) that coil (7) below is arranged produces secondary induction electric current, the secondary induction electric current of change produces secondary induction magnetic field around driving chip (10), the electromagnetic force of coil (7) is in driving chip (10), driving chip (10) moves downward and acts on drop hammer (13),
Drop hammer lifting and resetting means comprise T-shaped reference column (8), reset buffer spring (9) and drag-line (16), wherein, T-shaped reference column (8) upper end is connected with coil (7) flange with support (12) by set bolt (18), lower end penetrates driving chip (10), insert the inside of reset buffer spring (9) and be connected with the sheet metal of reset buffer spring (9) bottom, reset buffer spring (9) upper end is connected with driving chip (10), and wherein sheet metal is fixed on support (12); Drag-line (16) connects by the pulley of support (12) upper end drop hammer (13) and traction electric machine respectively, traction electric machine is fixed on the bottom of support (12), when carrying out falling weight impact test, traction electric machine pulls drag-line (16), and drag-line (16) is drawn high by fixed pulley drop hammer (13);
Drop impact device comprises guide pole (11), drop hammer (13), balancing weight (14), tup (15), wherein, tup (15) is arranged on (13) bottom of dropping hammer, drop hammer in (13) and have some balancing weights (14), drop hammer (13) insert guide pole (11), by the positioning and guiding of guide pole (11).
2. the energy storage of drop hammer tester according to claim 1 and resetting system, it is characterized in that: coil (7) is arranged on support (12), set bolt (18) penetrates coil (7) flange periphery and support (12) and T-shaped reference column (8).
3. the energy storage of drop hammer tester according to claim 1 and resetting system, it is characterized in that: driving chip (10) is manufactured by copper coin, driving chip (10) has through hole, and the lower end of T-shaped reference column (8) is inserted wherein.
4. the energy storage of drop hammer tester according to claim 1 and resetting means, it is characterized in that: metal weights block (14) is fluted, (13) inner axial Metallic rod of dropping hammer embeds in groove, and then in metal weights block (14) being arranged on drop hammer.
5. the energy storage of drop hammer tester according to claim 1 and resetting system, it is characterized in that: guide pole (11) up and down two ends inserts in falling tup machine support (12), driving chip (10) is connected with reset buffer spring (9), when carrying out the impulse test of dropping hammer, cushioned by reset buffer spring (9) after driving chip (10) drives dropping hammer.
6. the energy storage of drop hammer tester according to claim 1 and resetting system, it is characterized in that: drag-line (16) connects traction electric machine and drops hammer (13), when falling weight impact test will be carried out, by traction, drag-line (16) will drop hammer (13) draw high default position.
7. utilize the energy storage of the drop hammer tester described in claim 1 and resetting system to carry out a method for impulse test, it is characterized in that:
Step 1, place test specimen to be tested on chopping block (17);
Step 2, the impact energy experimentally required, drop hammer (13) directly can be promoted to maybe will drop hammer in midair (13) and be pulled up to the position with driving chip (10) connection by drag-line (16);
Step 3, alternating source (1) are boosted by step-up transformer;
Electric current after step 4, boosting transformation is by after rectifier (5), and become direct current, DC voltage is charged to electric capacity (3);
Step 5, closed circuit switch (4), make electric capacity (3) discharge;
Induction current in step 6, driving chip (10) produces secondary induction magnetic field, in the space of the induced field that secondary induction magnetic field and coil (7) produce between coil (7) and driving chip (10), driving chip (10) is subject to electromagnetic force, and drive drop hammer (13) to move downward, now, traction electric machine stops traction, and drag-line (16) is in relaxation state;
Step 7, driving chip (10) driving drop hammer (13) depart from drop hammer (13) afterwards, and upwards rebound, under the effect of T-shaped reference column (8), driving chip (10) returns to the position before driving;
Step 8, drop hammer (13) are clashed into the test specimen being placed on chopping block (17) and complete impulse test;
Step 9, complete impulse test after, drive motor traction cable (16), make to drop hammer (13) upwards promote, and return to its initial position.
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| CN105043708A (en) * | 2015-05-29 | 2015-11-11 | 苏州东菱科技有限公司 | Dummy pleural region calibration test device |
| CN109738308A (en) * | 2019-03-12 | 2019-05-10 | 长春工业大学 | A kind of rail drop hammer impact testing machine |
| CN112903483A (en) * | 2021-03-11 | 2021-06-04 | 天津大学 | Test device and method for simulating collapse and damage of lower beam plate structure under explosive load |
| CN115074648A (en) * | 2021-03-11 | 2022-09-20 | 中国科学院金属研究所 | Method for preparing nano block metal material by adopting electromagnetic impact and special equipment thereof |
| CN115074648B (en) * | 2021-03-11 | 2023-11-10 | 中国科学院金属研究所 | Method for preparing nano block metal material by electromagnetic impact and special equipment thereof |
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