CN204882020U - Mode test is with automatic device that strikes of variable wave form - Google Patents
Mode test is with automatic device that strikes of variable wave form Download PDFInfo
- Publication number
- CN204882020U CN204882020U CN201520433897.7U CN201520433897U CN204882020U CN 204882020 U CN204882020 U CN 204882020U CN 201520433897 U CN201520433897 U CN 201520433897U CN 204882020 U CN204882020 U CN 204882020U
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- steering wheel
- hammer body
- sensor
- connecting rod
- crank
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Abstract
The utility model provides a mode test is with automatic device that strikes of variable wave form belongs to mode and tests the field, and it mainly includes controller, digital steering wheel, workstation, crank dish and connecting rod composition's crank link mechanism, the lubricated part that strikes first device, sensor, connecting screw, sharp optical axis guide rail, various pairs and corresponding support fixed part etc. And strike first device and include the damped jump bit cap of change and hammer the body into shape, the utility model discloses a specific surge waveform of output is realized to the instantaneous rotational speed of programming control intelligence steering wheel, like triangular wave, pulse ripples etc. Adopt crank guide bar mechanism to be transformed into reciprocal linear motion with circular motion, install the tup additional at the guide arm end and come output drive power, still the contact time of steerable tup and energized part guarantees the controllability of impact force and attack time, the difficult problem that artifical actuation duration control of strikeing the contact is difficult, repeatability is poor, be difficult to encourage out the pulse ripples of ideal has been solved.
Description
Technical field
The utility model relates to a kind of automatic percussion device that can change waveform, particularly relates to a kind of mould measurement Variable Waveform automatic percussion device, belongs to mould measurement field.
Background technology
The amplitude that common mechanical type vibrator evokes is uneven, or even in single experiment, the dynamics of each exciting is all inconsistent, thus cannot ensure that the data measured by testing have accurate reliability.Even some modifying devices repack impulsive force hammer into eccentric mechanism, roughly can guarantee that the exciting amplitude of each cycle is consistent, but the speed within the cycle remains fixing, single sine wave can only be evoked in other words under certain rotating speed, and more accurate triangular wave is such as required for the instantaneous excitation that variable speed in one-period causes, pulsating waves etc. but cannot realize.
If the common slider-crank mechanism with cam thinks that in impact process wave amplitude is impacted in adjustment, must shut down, replacing cam makes it to have different molded line and can change amplitude; Then can only by improving or reduce rotating speed to realize to change frequency of impact, do so just simple change between some cycle the impact speed of impact speed that is in the single cycle remain identical, what evoked is the sine wave of different frequency, but not other waveforms, can only simple exciting vibration be carried out.
In mould measurement, generally use hand-held power to hammer into shape at present, hand-held power hammer easily causes double hit manually knocking in process, and each hammering dynamics can not quantize, and uses and wastes time and energy.Although and fluid pressure type percussion mechanism is more stable in performance, equipment is complicated, and there is Leakage.
The device of impact speed in the quick adjustment single cycle and multiple surge waveform can yet there are no ripe application at present.And the utility model improve in mechanical shocks performance with the obvious advantage, not only uniform and stable but also have cheap advantage easy to maintenance concurrently.
Summary of the invention
The purpose of this utility model can not evoke its waveform except sine wave and the uncontrollable drawback of waveform widths to solve existing percussion mechanism, and exported accurately by programmable, intelligent driving mechanism and impact each time, shock wave is reproducible, and automaticity is high and provide a kind of mould measurement Variable Waveform automatic percussion device.
The purpose of this utility model is achieved in that and comprises worktable, back up pad is on the table installed, steering wheel is on the supporting plate installed, the axle be connected with steering wheel output terminal, be sleeved on the crank disc on axle, the connecting rod that the projection arranged with crank disc outer rim end is hinged and the ram hammer body hinged with interlinking lever end, described worktable is also provided with adjusting post, adjusting post is provided with two setting nuts, and two setting nuts lay respectively at above and below worktable, the upper end of adjusting post is provided with fixed guide, fixed guide worn by described ram hammer, and be provided with linear bearing between ram hammer body and fixed guide, the screw-internal thread fit of the external thread that described ram hammer body is arranged by end and sensor one end realizes the connection of ram hammer body and sensor, the other end of sensor is connected with one end of studs by the internal thread arranged, the other end of studs is fixedly connected with hammer cap.
The utility model also comprises some architectural features like this:
1. the hinged place of the hinged place of the projection that connecting rod described in and crank disc outer rim end are arranged, connecting rod and ram hammer body is provided with bearing.
2. described in, the middle part of crank disc is provided with fabrication hole.
3. sensor described in is force snesor or acceleration transducer.
Compared with prior art, the beneficial effects of the utility model are: the utility model solves and manually knocks the difficult problem that control duration of contact is difficult, repeatability is poor, be difficult to motivate desirable pulsating wave, improve dependence manually to knock, the size and Orientation of each hammer force is difficult to the deficiency be consistent, and avoids the appearance of double hit phenomenon in test; Be applicable to be applied in mould measurement experiment, use the application that the utility model is hammered into shape as auto impact power.The speed that the utility model utilizes steering wheel accurately to control to impact, impact dynamics, duration of contact, obtain desirable surge waveform.Repeatable strong, intelligent automaticization designs, and improves work efficiency, farthest uses manpower and material resources sparingly.Firmly, reliability is high in the utility model design, ensures the controllability of impulsive force and surge waveform, both can bump, also can single-impact.Be applied in mould measurement, force snesor and impact head can be changed easily, to produce different natural frequencys when impacting, obtain accurately significantly data.
Accompanying drawing explanation
Fig. 1 is the utility model motion principle schematic diagram;
Fig. 2 is general structure schematic diagram of the present utility model;
Fig. 3 is the concrete structure schematic diagram of hammer body of the present utility model hammer cap portion;
Fig. 4 is the detail view of adjusting post of the present utility model and setting nut part.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Composition graphs 1 to Fig. 4, the new automatic percussion device of a kind of mould measurement Variable Waveform of the utility model design is formed referred to Fig. 2 by worktable 5, back up pad 4, fixed guide 9, adjusting post 13, connecting rod 6, hammer body 8, hammer cap 11, sensor 10, intelligent steering wheel 1, crank disc 2 and some link.
Described back up pad 4 and fixed guide 9 are fixed on worktable 5, and a manhole is arranged at back up pad 4 top, and hole is embedded with ball bearing, play the effect supporting shaft part and lubrication revolute pair.Fixing steering wheel on the supporting plate rotates output terminal and is connected with axle.Described crank disc 2 is fixed on axle 3 end, and axle 3 can drive crank disc 2 to make synchronous axial system.The outer rounded ends of crank disc 2 has a projection, is connected with connecting rod 6 through bearing.Fabrication hole is made with, i.e. weight reduction but also increase attractive in appearance in the middle part of crank disc 2.Connecting rod 6 end links with being connected pin 7 with hammer body 8, and connecting rod 6 and hammer body 8 freely can rotate at pin-and-hole place, and friction is very little.Fixed guide 9 is be made up of straight optical axis guide rail with hammer body 8, and hammer body 8 is inserted through fixed guide 9, can do accessible rectilinear motion in guide rail 9.Fixed guide 9 relies on adjusting post 13 to support, and regulates rail height by setting nut 12, and two setting nuts lay respectively at upper surface and the lower surface of worktable specifically, and is coordinated the adjustment realizing height with adjusting post by screw thread.Hammer body 8 end is processed with external thread, can coordinate, at sensor other end studs 14, nut 11 is fixed on sensor 10 top with sensor threads hole.Sensor 10 quilt cover is clipped in the middle, and is fixed through two ends.The circular motion of steering wheel 1 just can be converted to the linear reciprocating motion of tup 11 by described mechanism.
Described intelligent steering wheel can, by computer programming, download in steering wheel by data line, steering wheel according to programme and export the rotation of different momentary rate and different rotational angle, through the conversion of toggle, then waveform needed for producing.
Described impact tup can change hammer cap, and ram hammer cap 11 comprises plain metal rigidity hammer cap, and rubber or nylon etc. are nonmetallic has damping to hammer cap into shape.Hammer position, body 8 top is also connected with force snesor or acceleration transducer, can measure exciting force or the acceleration of each excitation generation.For being threaded between ram hammer body 8 with hammer cap 11.
Described worktable 5, connecting rod 6, hammer body 8, crank disc 2 are metalwork as mild carbon steel, process according to drawing.Fixed guide 9 relies on adjusting post 13 to be fixed on worktable 5, and matches with setting nut 12 and make it fastening.Back up pad 4 sunk screw is fixed on worktable 5 flat board.Steering wheel 1 is screwed in back up pad 4.The bearing shaft shoulder in each revolute pair and jump ring latched position also ensure normal rotation.Through hole in fixed guide 9 needs finishing to ream, and embedded linear bearing 15 also limits position with jump ring, needs coating lubricating oil, forms film lubrication, reduce friction when coordinating with hammer body 8.
Utility model works principle: the utility model comprises worktable 5, back up pad 4, fixed guide 9, adjusting post 13, connecting rod 6, hammer body 8, intelligent steering wheel 1, crank disc 2, hammer cap 11, sensor 10 and some links composition.Back up pad 4 and fixed guide 9 are fixed on worktable 5 by adjusting post 13 setting nut 12; The revolute pair that bearing is formed between connecting rod 6 and crank disc 2, between connecting rod 6 and hammer body 8; Moving sets is formed between hammer body 8 and fixed guide 9 through hole.Steering wheel can within the scope of 0 ~ 360 ° consecutive variations, control accuracy can reach 0.1 °, not only rotational frequency can be controlled, momentary rate can also be controlled, different corner changes can be produced, the adjustment of momentary rate during by rotating in identical tiny time, and accurate rotational angle, through the conversion of toggle, the linear rectilinear motion of converting rotary motion that in certain angle, speed does not wait the most at last exports different waveforms.
The physical construction motion principle schematic diagram that Fig. 1 is of the present utility model, A point is the driving shaft axle center be connected with steering wheel; B point is the revolute pair between crank disc and connecting rod; C point is the revolute pair between connecting rod and hammer body; D point is the moving sets between hammer body and fixed guide.
Then steering wheel turns clockwise, and the instantaneous angular velocity driving steering wheel during optional position is ω; The horizontal velocity of revolute pair C is the output speed of impact head; By pictorial relationships, the angle of crank AB and surface level is q, and the angle of connecting rod BC and surface level is φ, and on crank AB, the linear velocity of B point is V, rotates the tangential direction of circular arc along crank AB, and vertical with crank AB.The instantaneous horizontal speed that we can provide the C point of any time is expressed.
If M is the instantaneous center of velocity of BC, ω
1for taking M as the angular velocity of rotation of instantaneous center of velocity, crank length is r, and length of connecting rod is l, so:
ω
1BM＝V，ω
1CM＝V
c
Wherein BM is the distance of crank outer end to its instantaneous center of velocity, and CM is the distance between hammer body and the revolute pair that formed of connecting rod to its instantaneous center of velocity, V
cfor hammering the horizontal velocity of body into shape,
Can obtain:
Basis again:
CM＝ACtanθ
Distance wherein between the AC revolute pair that to be crank shaft core become with hammer figure to connecting rod,
Wherein AM is the distance between crank axle axle center to instantaneous center of velocity, and AB is crank length,
So:
Substitute into obtain the horizontal velocity of C point:
According to sine:
Finally can by the horizontal velocity V of hammer body
cwrite as the form about theta function expression formula f (θ).And angle θ is the integration θ=∫ ω dt of ω to the time, i.e. V
c=f (ω, t).
So be horizontal namely with AB bar
time for going out to begin the moment, through random time, steering wheel turns over certain angle
, and angular velocity under this angle we can embody in the program of writing, so the horizontal velocity of tup is union-compatible and is controlled.We can according to V
cthe velocity function relation i.e. required anti-speed releasing B point of surge waveform.Namely the time-varying relationship of our a demand angular velocity can allow steering wheel rotate according to this angular velocity, thus the surge waveform required for exporting, the size of impulsive force is measured by the force snesor be arranged on impact head.
Described in the utility model is a kind of automatic percussion device of mould measurement Variable Waveform, and it mainly comprises the toggle of controller, digital rudder controller, worktable, crank disc and connecting rod composition, impact head device (comprises ram hammer cap, sensor, connecting stud, straight optical axis guide rail, the lubricating component of various kinematic pair and the corresponding support fixation elements of changing damping.By programmable, intelligent steering wheel as motive power, adopt toggle that circular motion is transformed into linear reciprocating motion, install tup output drive power additional at connecting rod end.By programming Control steering wheel transient speed, realize exporting specific surge waveform.
The utility model can also comprise: for controlling the control source program of the waveform such as triangular wave, pulsating wave, sine wave that this intelligent steering wheel exports.The utility model also can be used as the electron bombardment power hammer of hand-held, can realize the duration of contact controlling tup and energized part, accurate control flaps machine power square size, ensure impulsive force and the controllability of attack time.Tup comprises hammer body and hammer cap, and hammer body is with hammer cap for split designs, and the two employing is threaded, and hammer cap is divided into multiple unlike material, can change according to different operating mode, to be adapted to produce different band width demands.
The utility model comprises the toggle of controller, digital rudder controller, worktable, crank disc and connecting rod composition, impact head device, the lubricating component of various kinematic pair and corresponding support fixation elements, impact head device comprises ram hammer cap, sensor, connecting stud, the straight optical axis guide rail of changing damping, by programmable, intelligent steering wheel as motive power, adopt toggle that circular motion is transformed into linear reciprocating motion, tup output drive power is installed additional at connecting rod end, by programming Control steering wheel transient speed, realize exporting specific surge waveform.Also comprise the control source program for controlling the waveform such as triangular wave, pulsating wave, sine wave that this intelligent steering wheel exports.The utility model is hammered into shape as the electron bombardment power of hand-held, can realize the duration of contact controlling tup and energized part, accurate control flaps machine power square size, ensure impulsive force and the controllability of attack time.Described tup is the portable assembly of replaceable hammer cap, and hammer body is with hammer cap for split designs, and the two employing is threaded, and hammer cap is divided into multiple unlike material, to be adapted to produce different band width demands.
Claims (5)
1. a mould measurement Variable Waveform automatic percussion device, it is characterized in that: comprise worktable, back up pad is on the table installed, steering wheel is on the supporting plate installed, the axle be connected with steering wheel output terminal, be sleeved on the crank disc on axle, the connecting rod that the projection arranged with crank disc outer rim end is hinged and the ram hammer body hinged with interlinking lever end, described worktable is also provided with adjusting post, adjusting post is provided with two setting nuts, and two setting nuts lay respectively at above and below worktable, the upper end of adjusting post is provided with fixed guide, fixed guide worn by described ram hammer, and be provided with linear bearing between ram hammer body and fixed guide, the screw-internal thread fit of the external thread that described ram hammer body is arranged by end and sensor one end realizes the connection of ram hammer body and sensor, the other end of sensor is connected with one end of studs by the internal thread arranged, the other end of studs is fixedly connected with hammer cap.
2. a kind of mould measurement Variable Waveform automatic percussion device according to claim 1, is characterized in that: the hinged place of the hinged place of the projection that described connecting rod and crank disc outer rim end are arranged, connecting rod and ram hammer body is provided with bearing.
3. a kind of mould measurement Variable Waveform automatic percussion device according to claim 1 and 2, is characterized in that: the middle part of described crank disc is provided with fabrication hole.
4. a kind of mould measurement Variable Waveform automatic percussion device according to claim 1 and 2, is characterized in that: described sensor is force snesor or acceleration transducer.
5. a kind of mould measurement Variable Waveform automatic percussion device according to claim 3, is characterized in that: described sensor is force snesor or acceleration transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520433897.7U CN204882020U (en) | 2015-06-23 | 2015-06-23 | Mode test is with automatic device that strikes of variable wave form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520433897.7U CN204882020U (en) | 2015-06-23 | 2015-06-23 | Mode test is with automatic device that strikes of variable wave form |
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| Publication Number | Publication Date |
|---|---|
| CN204882020U true CN204882020U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520433897.7U Withdrawn - After Issue CN204882020U (en) | 2015-06-23 | 2015-06-23 | Mode test is with automatic device that strikes of variable wave form |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913895A (en) * | 2015-06-23 | 2015-09-16 | 哈尔滨工程大学 | Waveform-variable automatic impact device for modal test |
| CN105716816A (en) * | 2016-02-01 | 2016-06-29 | 工业和信息化部电子第五研究所 | Modal test device |
| CN110617931A (en) * | 2019-10-18 | 2019-12-27 | 浙江工业大学 | Stable vibration exciting device for test |
| CN111693388A (en) * | 2020-07-09 | 2020-09-22 | 北京汽车集团越野车有限公司 | Variable force excitation device |
| CN113441789A (en) * | 2021-07-05 | 2021-09-28 | 浙江皇冠电动工具制造有限公司 | Reciprocating saw |
| CN113686954A (en) * | 2021-07-14 | 2021-11-23 | 中国水利水电科学研究院 | Exciting small hammer for detecting stress wave of anchor rod and using method thereof |
| CN114382167A (en) * | 2022-01-27 | 2022-04-22 | 中国铁建重工集团股份有限公司 | Tunnel dredging device |
| CN117723637A (en) * | 2024-02-09 | 2024-03-19 | 同济大学 | Tunnel contact type detection system and periodic shock wave excitation device thereof |
| DE102023105135B3 (en) | 2023-03-02 | 2024-04-25 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Pendulum and pendulum test device |
-
2015
- 2015-06-23 CN CN201520433897.7U patent/CN204882020U/en not_active Withdrawn - After Issue
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913895A (en) * | 2015-06-23 | 2015-09-16 | 哈尔滨工程大学 | Waveform-variable automatic impact device for modal test |
| CN104913895B (en) * | 2015-06-23 | 2017-08-04 | 哈尔滨工程大学 | A kind of mould measurement Variable Waveform automatic percussion device |
| CN105716816A (en) * | 2016-02-01 | 2016-06-29 | 工业和信息化部电子第五研究所 | Modal test device |
| CN105716816B (en) * | 2016-02-01 | 2019-02-12 | 工业和信息化部电子第五研究所 | Modal test device |
| CN110617931A (en) * | 2019-10-18 | 2019-12-27 | 浙江工业大学 | Stable vibration exciting device for test |
| CN111693388A (en) * | 2020-07-09 | 2020-09-22 | 北京汽车集团越野车有限公司 | Variable force excitation device |
| CN113441789A (en) * | 2021-07-05 | 2021-09-28 | 浙江皇冠电动工具制造有限公司 | Reciprocating saw |
| CN113686954A (en) * | 2021-07-14 | 2021-11-23 | 中国水利水电科学研究院 | Exciting small hammer for detecting stress wave of anchor rod and using method thereof |
| CN113686954B (en) * | 2021-07-14 | 2022-11-22 | 中国水利水电科学研究院 | Small exciting hammer for detecting stress wave of anchor rod and using method of small exciting hammer |
| CN114382167A (en) * | 2022-01-27 | 2022-04-22 | 中国铁建重工集团股份有限公司 | Tunnel dredging device |
| DE102023105135B3 (en) | 2023-03-02 | 2024-04-25 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Pendulum and pendulum test device |
| CN117723637A (en) * | 2024-02-09 | 2024-03-19 | 同济大学 | Tunnel contact type detection system and periodic shock wave excitation device thereof |
| CN117723637B (en) * | 2024-02-09 | 2024-04-19 | 同济大学 | Tunnel contact type detection system and periodic shock wave excitation device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151216 Effective date of abandoning: 20170804 |