CN105510139B - Dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine - Google Patents
Dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine Download PDFInfo
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The present invention relates to a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine, upper end restraint device, intermediate restraint device, lower end restraint device and dynamic constrained device including reference center on same axial line.Experimental rig of the present invention is easy to make, and assembly is simple, and safe operation, development cost is low, strong applicability, is conducive to promote and apply.The present invention is the dynamic compression bar stabilization testing device developed on electro-hydraulic servo testing machine, the measurement of strut buckling dynamic critical load may be implemented, be conducive to improve measurement accuracy, the present apparatus is not only that testing machine increases test resource, and more institution of higher learning and universities and secondary specialized schools provide a kind of mechanics teaching experimental rig of innovation.
Description
Technical field
The present invention relates to the auxiliary devices in electro-hydraulic servo testing machine technical field, especially a kind of to try for electro-hydraulic servo
Test the dynamic pressure bar stabilization experimental provision of machine.
Background technique
Electro-hydraulic servo testing machine is widely used in metering quality inspection, iron and steel metallurgy, machine-building, electronic apparatus, automobile production, electricity
Line cable, civil aviation, commodity inspection arbitration, building materials ceramics, petrochemical industry, technical supervision, institution of higher learning and scientific research and testing institute etc. are more
Square field, for doing stretching, compression, bending, shearing, fracture mechanics, low week and the high cycle fatigue of various metals, nonmetallic materials
Deng test.
In practical projects, component or the unstable failure of structure often occur suddenly, have great harmfulness.Point
Both Need Hierarchy Theory analysis is measured with greater need for test for the determining structure of analysis or the critical load of component.Currently, pressure bar stabilization experiment has become
For one of institution of higher learning and the important mechanical test of universities and secondary specialized schools, traditional pressure bar stabilization experiment is that static measurement compression bar loses
Steady critical load, and it is domestic not yet in the measurement of the critical load of the enterprising Mobile state strut buckling of electro-hydraulic servo testing machine.
In conclusion a kind of dynamic compression bar stabilization testing device for electro-hydraulic servo testing machine is developed, it can be preferably
Design of Experimental Teaching Mode of Mechanics content is enriched, realizes critical load measurement of the compression bar in dynamic buckling, its existing scientific research valence
Value more has teaching significance.
Summary of the invention
In place of making up the deficiencies in the prior art, the critical load of strut buckling can be overcome by providing one kind
The defect of lotus static measurement improves the dynamic pressure bar stabilization experiment dress for electro-hydraulic servo testing machine of measurement result accuracy
It sets.
The purpose of the present invention is what is realized by following technological means:
A kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine, it is characterised in that: including reference center
Upper end restraint device, intermediate restraint device, lower end restraint device and dynamic constrained device on same axial line, it is described
The top of upper end restraint device and the upper grip of electro-hydraulic servo testing machine connect, and intermediate restraint is arranged in the lower section of upper end restraint device
Device, intermediate restraint device, lower end restraint device and dynamic constrained device are from top to bottom sequentially connected, under dynamic constrained device
The connection of the lower collet of portion and electro-hydraulic servo testing machine.
Moreover, the upper end restraint device includes from top to bottom sequentially connected upper folder reel, terminal pad, force-measuring sensing
Device, anti-rotation flange, anti-rotation positioning key, seaming chuck, fixed left and right on hinged V-type briquetting, upper end clamping lever and compression bar on compression bar
Ambulatory splint, upper folder reel is fitted into the upper grip of electro-hydraulic servo testing machine and is fixedly clamped by upper grip, in seaming chuck along axis
The upper surface of heart is embedded in anti-rotation positioning key with anti-rotation flange contact surface, on compression bar in the groove of hinged V-type briquetting insertion seaming chuck.
Moreover, the intermediate restraint device includes compression bar intermediate restraint support plate, the first reading ruler, compression bar intermediate active
The lower section of upper end restraint device, compression bar intermediate restraint branch is arranged in fixture and intermediate clamping lever, compression bar intermediate restraint support plate
Open slot is produced on fagging, compression bar intermediate active fixture guiding is slidably mounted in open slot and can freely move in the axial direction
Dynamic, compression bar intermediate active fixture connects intermediate clamping lever, is fixedly mounted with the first reading ruler on the left of compression bar intermediate restraint support plate, presses
The bottom of bar intermediate restraint support plate is connected and fixed with the firm banking plate in the restraint device of lower end.
Moreover, the lower end restraint device includes firm banking plate, turntable, the second reading ruler, removable mounting and a left side
Right ambulatory splint, the bottom surface of firm banking plate connect turntable, the positioning and guiding reel in the turntable and dynamic constrained device by
Lock-screw connection, the positioning and guiding reel in the center positioning table and dynamic constrained device that the bottom surface of firm banking plate is arranged
Center positioning hole cooperation；Firm banking front edge of board face connection pinching screw, the second reading ruler of upper end face paste are put in upper grooves
It is equipped with removable mounting, moves mounting mounted inside compression bar support shaft, compression bar support shaft surface treatment is left and right rotation direction
Screw, the screw part are assembled with the left and right ambulatory splint being arranged in inside removable mounting, compression bar support shaft
Centre is processed into disc and is cooperated with compression column with fixed lower ending opening circular groove, and the coaxially connected rotation in one end of compression bar support shaft clamps hand
Handle, the rotation clamping lever can push left and right ambulatory splint to be fixedly clamped with compression bar lower end.
Moreover, the dynamic constrained device includes lower folder axle sleeve, the anti-rotation positioning key, cylinder from bottom to top set gradually
Spring and positioning and guiding reel, lower folder axle sleeve are fitted into the lower collet of electro-hydraulic servo testing machine, the connecting shaft of positioning and guiding reel
It is inserted into lower folder axle sleeve, and is embedded in anti-rotation positioning key in the contact surface of lower folder axle sleeve and positioning and guiding reel connecting shaft, fixed
Coaxial package cylindrical spring in the connecting shaft of position guiding reel, the cylindrical spring are located at the bottom of the disc of positioning and guiding reel
Between face and the upper surface of lower folder axle sleeve.
Moreover, further include compression bar test sample, above the compression bar of the compression bar test sample blade hinge support by end skiving,
The V-groove bottom of radius 0.5mm is made in tip tangent arc and upper hinged V-type briquetting cooperates, and compression bar lower ending opening circular groove is put into
In the optical axis section of support shaft.
Moreover, further including lower collet anti-rotation device, which includes the vertical bent plate of main support, bearing positioning
Axis, bearing, bearing baffle and fixed baffle, bearing locating shaft are two be arranged above and below, the axis of the upper and lower bearing locating shaft
Line is mounted on lower collet in the vertical direction fixed spacing that is staggered, and a bearing, main support are set on each bearing locating shaft
A vertical long hole is produced on vertical bent plate, two bearings are arranged in the vertical long hole；
A groove slideway is produced in the left and right sides at the vertical bent plate back side of main support respectively, two groove slideways with it is perpendicular
Straight long hole is connected, and be slidably installed a bearing baffle in each groove slideway, and the bearing baffle is passing through bearing baffle just
Face pinching screw is mounted in the groove slideway of the vertical bent plate of main support, and the inside of left and right bearing baffle presses against ipsilateral respectively
Bearing on, a fixed baffle is respectively set on the outside of left and right bearing baffle, which passes through fixation respectively
Baffle side pinching screw is fixed in the left and right side walls of the vertical bent plate of main support, is respectively mounted one on the left and right fixed baffle
Adjusting screw, the front end of the adjusting screw are pressed against respectively on the lateral wall of left and right bearing baffle.
Moreover, the vertical bent plate of the main support is installed on the workbench by bent plate fixing screws；The main support
A lateral long hole is produced in the vertical positive left and right sides of bent plate respectively, is inserting a bearing baffle just in each transverse direction long hole
Face pinching screw, the left and right bearing baffle front pinching screw are connect with clamping screw hole made on left and right bearing baffle respectively
Locking；The left and right side walls of the vertical bent plate of the main support produce side screw hole, and fixed baffle clamping sides screw is mounted on
In the side screw hole.
The advantages and positive effects of the present invention are:
1, the present invention can survey and draw compression bar rod end using the sensing equipment dynamometry of electro-hydraulic servo testing machine and the function of displacement
Stress and rod end length travel relation curve, determine strut buckling load.Directly apply that electro-hydraulic servo testing machine is original to match
It sets, constructs domestic advanced teaching experiment at present, and innovate and efficiently utilize electro-hydraulic servo testing machine.
2, in the restraint device of upper end, load cell is according to the stability experiment institute of compression bar material (metal or nonmetallic)
Magnitude of load is needed, the portions such as suitable different loads range force detecting sensor and terminal pad, upper folder reel and anti-rotation flange may be selected
Part connection, the power can access the closed-loop control system of electro-hydraulic servo testing machine, carry out the control of accurate displacement and power, can have
Effect improves the measurement accuracy for the experiment of different materials strut stability.
3, dynamometry and displacement keep experimental data processing convenient, accurate by connecting with computer.Test process compression bar stress
Size and displacement by computer can real-time digital show, and the curve of consecutive variations is drawn in real time, for the carrying of research compression bar and mistake
Surely provide good intuitive analysis condition.
4, the design of experimental rig structure is the compression bar simulated in Practical Project, implementable dynamically load (impact of pressure pressure), can
It realizes that compression bar both ends are fixed, middle part and multistage are fixed to test with compression bar initial eccentricity unstability, be mentioned for effective unstability experimental study
Prerequisite is supplied.
5, compression bar dynamic buckling can have not only been done on electro-hydraulic servo testing machine but also can do static instability test, and it is real to enrich teaching
Content is tested, static state is compared to each other with dynamic test, can open up new thinking and research space.
6, experimental rig of the present invention is easy to make, and assembly is simple, and safe operation, development cost is low, strong applicability, conducive to pushing away
Wide application.The present invention is the dynamic compression bar stabilization testing device developed on electro-hydraulic servo testing machine, and strut buckling may be implemented
The measurement of dynamic critical load is conducive to improve measurement accuracy, and the present apparatus is not only that testing machine increases test resource, more high
Equal universities and colleges and universities and secondary specialized schools provide a kind of mechanics teaching experimental rig of innovation.
Detailed description of the invention
Fig. 1 is general structure schematic diagram of the invention；
Fig. 2 is the cross-sectional view of firm banking plate center positioning table Yu positioning and guiding reel location hole；
Fig. 3 is the top view of lower end restraint device；
Fig. 4 is the general structure schematic diagram of lower collet anti-rotation device；
Fig. 5 is the cross-sectional view of lower collet anti-rotation device；
Fig. 6 is the main view of compression bar test sample；
Fig. 7 is the side view of Fig. 6；
Fig. 8 is the A of Fig. 7 to enlarged diagram.
Specific embodiment
Describe the embodiment of the present invention in detail with reference to the accompanying drawing；It should be noted that the present embodiment be it is narrative, no
It is restrictive, this does not limit the scope of protection of the present invention.
A kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine, including reference center is in same axle center
Upper end restraint device, intermediate restraint device, lower end restraint device and dynamic constrained device on line, the upper end restraint device
Top and the upper grip [29] of electro-hydraulic servo testing machine connect, intermediate restraint device is arranged in the lower section of upper end restraint device, in
Between restraint device, lower end restraint device and dynamic constrained device be from top to bottom sequentially connected, the lower part of dynamic constrained device and electricity
The lower collet [30] of hydraulic servo testing machine connects.The structure of each device is described in detail below:
(1) the upper end restraint device: passed including from top to bottom sequentially connected upper folder reel [27], terminal pad [26], dynamometry
Sensor [31], anti-rotation flange [25], anti-rotation positioning key [24], seaming chuck [23], hinged V-type briquetting [22], upper end folder on compression bar
It is fixed left and right ambulatory splint [20] on tight handle [21] and compression bar, upper folder reel [27] is packed into the upper grip of electro-hydraulic servo testing machine
In and be fixedly clamped by upper grip, the anti-rotation flange [25] of load cell passes through load cell and terminal pad [26] and upper folder
Reel [27] connection, load cell control and are located with microcomputer with the displacement sensor [32] being arranged in below hydraulic actuator
The connection of reason system.
Anti-rotation positioning key [24] are embedded in along the upper surface of axle center and anti-rotation flange [25] contact surface in seaming chuck [23], and are ensured
Seaming chuck will not generate rotation in surface during test.The groove of hinged V-type briquetting [22] insertion seaming chuck [23] on compression bar
In, the slot bottom of V-type briquetting ensures that the coaxial of compression bar sample axis and pressure, in the axis of whole device on axis in this way
On heart line.Left and right ambulatory splint [20] are fixed on upper end clamping lever connection compression bar, i.e. by rotation upper end clamping lever [21]
It can push and fix left and right ambulatory splint [20] on compression bar and be fixedly clamped with compression bar sample [19] upper knife edge end.
Compression bar stabilization testing process may be implemented using concentric shafts collet above and below electro-hydraulic servo testing machine in upper end restraint device
The determination of middle compression bar position both can ensure that compression bar was in concentric stress, can also realize quantitative bias-load test.
(2) intermediate restraint device: including living among compression bar intermediate restraint support plate [15], the first reading ruler [16], compression bar
The lower section of upper end restraint device is arranged in dynamic fixture [17] and intermediate clamping lever [18], compression bar intermediate restraint support plate [15],
Open slot is produced in compression bar intermediate restraint support plate, compression bar intermediate active fixture [17] guiding is slidably mounted in open slot and can
It moves freely, is then realized and compression bar intermediate restraint by the screw bolt and nut of compression bar intermediate active clamp back surface in the axial direction
Support plate is fixedly clamped, to realize that intermediate or multistage constrains compression bar stabilization testing.In compression bar intermediate active fixture [17] connection
Between clamping lever [18], be fixedly mounted with the first reading ruler [16] on the left of compression bar intermediate restraint support plate [15], the first reading ruler is vertical
Histogram is to the bottom of compression bar intermediate restraint support plate [15] is connected and fixed with the firm banking plate [8] in the restraint device of lower end.
(3) the lower end restraint device: including firm banking plate [8], turntable [6], the second reading ruler [10], removable mounting
[11] and left and right ambulatory splint [13], the bottom surface of firm banking plate connects turntable, in the turntable [6] and dynamic constrained device
Positioning and guiding reel [5] by lock-screw [7] connect, firm banking plate [8] bottom surface be arranged center positioning table [8-1] and
The center positioning hole of positioning and guiding reel [5] in dynamic constrained device cooperates, and guarantees that lower end restraint device is coaxial, elastic locking
Screw [7], rotation turntable [6] can generate rotation in surface or fixed along axle center, to adjust compression bar sample or more axle center
Position is at no-twist condition.
Firm banking plate [8] front end face connects pinching screw [9], the second reading ruler of upper end face paste [10] (second reading ruler
For horizontal direction), be placed with removable mounting [11] in upper grooves, move mounting [11] mounted inside compression bar support shaft
[12], compression bar support shaft surface treatment is the screw of left and right rotation direction, and the screw part and setting are in movable seat
Internal left and right ambulatory splint [13] assembly of frame [11], disc [28-2] and and compression column with fixed are processed into the centre of compression bar support shaft
Lower end [28-1] opening circular groove cooperation, the coaxially connected rotation clamping lever [14] in one end of compression bar support shaft, the rotation clamp hand
Handle [14] can push left and right ambulatory splint [13] to be fixedly clamped with compression bar lower end [28].Removable mounting is oriented to by pinching screw
It is slidably arranged on firm banking plate, elastic pinching screw [9], removable mounting [11] can be moved along reading ruler direction, be realized
Concentric or quantitative eccentric compressive bar stability test.
(4) dynamic constrained device: including from bottom to top set gradually lower folder axle sleeve [2], anti-rotation positioning key [3], cylinder
Spring [4] and positioning and guiding reel [5], lower folder axle sleeve [2] are fitted into the lower collet of electro-hydraulic servo testing machine, positioning and guiding reel
[5] connecting shaft is inserted into lower folder axle sleeve [2], and the contact surface in lower folder axle sleeve [2] and positioning and guiding reel [5] connecting shaft
It is embedded in anti-rotation positioning key [3], the coaxial package cylindrical spring in the connecting shaft of positioning and guiding reel [5], which is located at
Between the bottom surface of the disc of positioning and guiding reel [5] and the upper surface of lower folder axle sleeve [2], hydraulic actuator is moved back and forth
Power be transmitted to lower end restraint device.
Dynamic constrained device can ensure that lower folder axle sleeve [2] only can be along the axial direction of positioning and guiding reel [5] connecting shaft in test
It moves up and down, without can rotate, while cooperating lower collet anti-rotation device [1], it is final real to realize the circumferentially fixed of lower collet
Compression bar is in concentric stress during existing compression bar stabilization testing.
(5) is matched with experimental rig the invention also includes compression bar test sample and is devised the test of two fixed ends compression bar
Sample, as shown in Figure 6.Radius is made in end skiving, tip by blade hinge support above the compression bar of the compression bar test sample [19]
The V-groove bottom of the tangent arc of 0.5mm and upper hinged V-type briquetting [22] cooperates, and compression bar lower ending opening circular groove is put into support shaft
[12] in optical axis section.Then pressed and sample but do not stressed by testing machine, can adjust automatically compression bar axis and pressure concentricity,
Cooperate the rotation of turntable [6] to adjust compression bar sample or more shaft core position, it can be to avoid the distortion of compression bar.Again respectively in rotation
Lower clamping lever pushes ambulatory splint that compression bar is made to be fixedly clamped, and the clamped constraint of ideal fixing end is close to after clamping.
(6) for the invention also includes lower collet anti-rotation device, which includes the vertical bent plate [1- of main support
1], bearing locating shaft [1-6], bearing [1-7], bearing baffle [1-8] and fixed baffle [1-3], the vertical bent plate of main support pass through
Bent plate fixing screws [1-2] are mounted on workbench [1-12].Bearing locating shaft is two be arranged above and below, the upper and lower bearing
The axis of locating shaft is mounted on lower collet in the vertical direction fixed spacing that is staggered, and an axis is set on each bearing locating shaft
It holds, a vertical long hole [1-5] is produced on the vertical bent plate of main support, two bearings are arranged in the vertical long hole.
A groove slideway [1-13] is produced in the left and right sides at the vertical bent plate back side of main support respectively, two groove slideways
It is connected with vertical long hole, be slidably installed a bearing baffle in each groove slideway, and the bearing baffle passes through bearing
Baffle front pinching screw [1-4] is mounted in the groove slideway of the vertical bent plate of main support.That is: in the vertical bent plate front of main support
The left and right sides produce a lateral long hole respectively, insert a bearing baffle front pinching screw in each transverse direction long hole,
The left and right bearing baffle front pinching screw connect locking with clamping screw hole [1-9] made on left and right bearing baffle respectively.
The inside of left and right bearing baffle is pressed against respectively on ipsilateral bearing, is respectively set on the outside of left and right bearing baffle
One fixed baffle, the left and right fixed baffle pass through respectively fixed baffle clamping sides screw [1-11] be fixed on main support hang down
In the left and right side walls of straight bent plate, it may be assumed that the left and right side walls of the vertical bent plate of main support produce side screw hole, fixed baffle side folder
Tight screw is mounted in the side screw hole.An adjusting screw [1-10], the adjusting screw are respectively mounted on the left and right fixed baffle
Front end pressed against on the lateral wall of left and right bearing baffle respectively.
It is described in detail combined with specific embodiments below and carries out dynamic compression bar using dynamic compression bar stabilization testing device of the present invention
The course of work of unstability test.
Implementation condition: using the compression bar sample that both ends are fixed, fixture carries out both ends fixed constraint and intermediate restraint to sample,
And guarantee coaxial line.
Embodiments thereof are: lower collet anti-rotation device are correctly installed according to Fig. 4: first will with bent plate fixing screws [1-2]
Vertical bent plate [1-1] is fixed on the table, and secondly two bearing locating shafts [1-6] are staggered a fixed spacing in the vertical direction
It is connected and fixed by screw thread and lower collet, then assembles one with bearing [1-7], it is sliding that bearing baffle [1-8] is finally packed into groove
In road [1-13], and left and right bearing baffle is set to be adjacent to two bearings in left and right respectively, then screw bearing baffle front pinching screw [1-
4], fixed baffle [1-3] then is loaded onto bearing baffle [1-8] and the side vertical bent plate [1-1], and is fastened and fixed baffle side
Pinching screw [1-11], while adjusting screw [1-10] is adjusted, so that it is held out against bearing baffle side face.
Referring to Fig.1, lower folder axle sleeve [2] is fitted into down in collet and is clamped, by positioning and guiding reel [5] and lower folder axle sleeve [2]
It is linked and packed by anti-rotation positioning key [3], wherein cylindrical spring [4] assembles therebetween.As shown in Fig. 2, by turntable [6] with
Positioning and guiding reel [5] connection, wherein the center on firm banking board bottom face center positioning table [8-1] and positioning and guiding reel
Location hole cooperation has arcuate socket and lock-screw [7] to cooperate to guarantee concentricity, while on turntable [6], and rotation turntable can make
Firm banking plate circumferentially rotates to adjust compression bar sample or more shaft core position relative to positioning and guiding reel.Elastic pinching screw
[9], moving mounting [11] can be mobile along the second reading ruler [10] direction, realizes that concentric or quantitative eccentric compressive bar stablizes examination
It tests.Opening circular groove below sample is placed in the optical axis section of compression bar support shaft [12], is rotated clamping lever [14], makes a fixed left side
Right ambulatory splint [13] clamps sample, realizes fixed constraint.Compression bar intermediate active fixture [17] can edge in support plate open slot
Axis direction moves freely, if making the zero point or non-zero points in its Left-side center line alignment the first reading ruler [16], then passes through
The screw bolt and nut of clamp back surface is fixed with support plate, and rotation clamping lever [18] is so that the left and right of compression bar intermediate active fixture is lived
Dynamic clamping plate clamps sample, to realize that intermediate or multistage constrains compression bar stabilization testing.Upper folder reel [27], which is fitted into upper grip, to be clamped,
The V-groove bottom of blade hinge support above compression bar and upper hinged V-type briquetting [22] is cooperated, upper beam position is adjusted, makes compression bar pressure
It closes but does not stress, to realize the concentricity of adjust automatically compression bar axis and pressure, and rotary turnplate [6] is cooperated to can adjust on compression bar
Lower shaft core position avoids sample from twisting deformation.Lock-screw [7] is screwed to fix turntable [6] position, while rotating clamping
Handle [21] realizes that the upper end of compression bar is fixed.Compression bar sample can be installed by completing the above process, for different the way of restraint
Test can be completed by changing constraint type and constrained.To compression bar reinforcing, power is unloaded by hydraulic actuator Bit andits control
It realizes (speed, direction, displacement and the power of actuator controllable load).
After the above process is to sample reinforcing, the power of upper folder reel [27] lower part is mounted on using electro-hydraulic servo testing machine
Sensor experiences compression bar by compressive load and is converted into electric signal and is sent into microcomputer control and processing system, by computer digit display load
Lotus and Automatic Drawing.At the same time, the displacement sensor positioned at hydraulic actuator lower part experiences compression bar vertical displacement, and is converted into
Electric signal inputs computer, show and Automatic Drawing by computer digit, thus test out after load the rod end stress of sample and
Length travel curve determines the dynamic critical load of strut buckling by the curve.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, all of these belong to the protection of the present invention.
Claims (7)
1. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine, it is characterised in that: exist including reference center
Upper end restraint device, intermediate restraint device, lower end restraint device and dynamic constrained device on same axial line, described is upper
The upper grip on the top and electro-hydraulic servo testing machine of holding restraint device connects, and the lower section setting intermediate restraint of upper end restraint device fills
It sets, intermediate restraint device, lower end restraint device and dynamic constrained device are from top to bottom sequentially connected, the lower part of dynamic constrained device
It is connect with the lower collet of electro-hydraulic servo testing machine；
Further include lower collet anti-rotation device, the lower collet anti-rotation device include the vertical bent plate of main support, bearing locating shaft, bearing,
Bearing baffle and fixed baffle, bearing locating shaft are two be arranged above and below, and the axis of the upper and lower bearing locating shaft is vertical
The direction fixed spacing that is staggered is mounted on lower collet, and a bearing, the vertical bent plate of main support are set on each bearing locating shaft
On produce a vertical long hole, two bearings are arranged in the vertical long hole；
A groove slideway is produced in the left and right sides at the vertical bent plate back side of main support respectively, which grows with vertical
Hole is connected, and be slidably installed a bearing baffle in each groove slideway, and the bearing baffle is pressed from both sides by bearing baffle front
Tight screw is mounted in the groove slideway of the vertical bent plate of main support, and the inside of left and right bearing baffle presses against ipsilateral axis respectively
It holds, a fixed baffle is respectively set on the outside of left and right bearing baffle, which passes through fixed baffle respectively
Clamping sides screw is fixed in the left and right side walls of the vertical bent plate of main support, and an adjustment is respectively mounted on the left and right fixed baffle
Screw, the front end of the adjusting screw are pressed against respectively on the lateral wall of left and right bearing baffle.
2. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
Be: the upper end restraint device includes from top to bottom sequentially connected upper folder reel, terminal pad, load cell, anti-rotation
Flange, anti-rotation positioning key, seaming chuck, fixed left and right activity folder on hinged V-type briquetting, upper end clamping lever and compression bar on compression bar
Plate, upper folder reel is fitted into the upper grip of electro-hydraulic servo testing machine and is fixedly clamped by upper grip, in seaming chuck along the upper of axle center
Face and anti-rotation flange contact surface are embedded in anti-rotation positioning key, on compression bar in the groove of hinged V-type briquetting insertion seaming chuck.
3. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
Be: the intermediate restraint device include compression bar intermediate restraint support plate, the first reading ruler, compression bar intermediate active fixture and in
Between clamping lever, compression bar intermediate restraint support plate is arranged in the lower section of upper end restraint device, makes in compression bar intermediate restraint support plate
Open slot out, compression bar intermediate active fixture guiding is slidably mounted in open slot and can move freely in the axial direction, in compression bar
Between floating holder connect intermediate clamping lever, be fixedly mounted with the first reading ruler on the left of compression bar intermediate restraint support plate, among compression bar about
The bottom of bundle branch fagging is connected and fixed with the firm banking plate in the restraint device of lower end.
4. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
Be: the lower end restraint device includes firm banking plate, turntable, the second reading ruler, removable mounting and left and right activity folder
Plate, the bottom surface of firm banking plate connect turntable, and the positioning and guiding reel in the turntable and dynamic constrained device is by lock-screw
The center of connection, the positioning and guiding reel in the center positioning table and dynamic constrained device that the bottom surface of firm banking plate is arranged is fixed
The cooperation of position hole；Firm banking front edge of board face connection pinching screw, the second reading ruler of upper end face paste, be placed in upper grooves it is removable
Dynamic mounting moves mounting mounted inside compression bar support shaft, and compression bar support shaft surface treatment is the screw of left and right rotation direction,
The screw part is assembled with the left and right ambulatory splint being arranged in inside removable mounting, and the centre of compression bar support shaft is processed into
Disc simultaneously cooperates, the coaxially connected rotation clamping lever in one end of compression bar support shaft, the rotation with compression column with fixed lower ending opening circular groove
Clamping lever can push left and right ambulatory splint to be fixedly clamped with compression bar lower end.
5. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
Be: the dynamic constrained device includes the lower folder axle sleeve from bottom to top set gradually, anti-rotation positioning key, cylindrical spring and determines
Position guiding reel, lower folder axle sleeve are fitted into the lower collet of electro-hydraulic servo testing machine, and the connecting shaft of positioning and guiding reel is inserted into down
It presss from both sides in axle sleeve, and is embedded in anti-rotation positioning key in the contact surface of lower folder axle sleeve and positioning and guiding reel connecting shaft, in positioning and guiding axis
Coaxial package cylindrical spring in the connecting shaft of disk, the cylindrical spring are located at the bottom surface and lower folder of the disc of positioning and guiding reel
Between the upper surface of axle sleeve.
6. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
It is: further includes compression bar test sample, end skiving, tip are made blade hinge support above the compression bar of the compression bar test sample
The V-groove bottom of the tangent arc of radius 0.5mm and upper hinged V-type briquetting cooperates, and compression bar lower ending opening circular groove is put into support shaft
In optical axis section.
7. a kind of dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine according to claim 1, feature
Be: the vertical bent plate of the main support is installed on the workbench by bent plate fixing screws；The vertical bent plate of the main support
A lateral long hole is produced in the positive left and right sides respectively, inserts a bearing baffle front in each transverse direction long hole and clamps spiral shell
Nail, the left and right bearing baffle front pinching screw connect locking with clamping screw hole made on left and right bearing baffle respectively；Institute
The left and right side walls of the vertical bent plate of the main support stated produce side screw hole, and fixed baffle clamping sides screw is mounted on the side
In screw hole.
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| CN201510866957.9A CN105510139B (en) | 2015-12-01 | 2015-12-01 | Dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510866957.9A CN105510139B (en) | 2015-12-01 | 2015-12-01 | Dynamic pressure bar stabilization experimental provision for electro-hydraulic servo testing machine |
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| CN105510139A CN105510139A (en) | 2016-04-20 |
| CN105510139B true CN105510139B (en) | 2018-12-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106920436B (en) * | 2017-03-03 | 2019-02-15 | 衢州学院 | A kind of mechanics of materials distortional stress demonstration teaching aid |
| CN108931436B (en) * | 2018-06-01 | 2021-02-26 | 陕西省地质环境监测总站 | Eccentric loading and shear creep combined action test device for soft rock |
| CN112286141B (en) * | 2020-10-28 | 2022-06-10 | 山东钢铁集团日照有限公司 | Closed-loop servo control electromagnet buckling-instability-preventing device |
| CN112816327A (en) * | 2021-02-03 | 2021-05-18 | 济南恒瑞金试验机有限公司 | Tensile and compressive testing machine and testing method for structural wood laminated wood |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1013809B (en) * | 1986-04-07 | 1991-09-04 | 天津纺织工学院 | Biaxial electronic tensile test machine |
| CN100476396C (en) * | 2006-05-29 | 2009-04-08 | 天津大学 | Pressing lever steady experimental device for electronic universal testing machine |
| CN100410561C (en) * | 2006-10-19 | 2008-08-13 | 哈尔滨工业大学 | Non-linear press-rod spring device |
| CN201060134Y (en) * | 2007-06-14 | 2008-05-14 | 宁波赛盟科技发展有限公司 | Dynamoelectric servo dynamic testing machine |
| US7631563B2 (en) * | 2007-09-05 | 2009-12-15 | Key Energy Services, Inc. | Method and system for evaluating rod breakout based on tong pressure data |
| CN101738273A (en) * | 2008-11-21 | 2010-06-16 | 北京工业大学 | Loading device for compressive capacity test |
| CN202351069U (en) * | 2011-12-06 | 2012-07-25 | 西北工业大学 | Hydraulic impulse excitation device for experimental research on structure dynamic properties |
| CN204166798U (en) * | 2014-10-20 | 2015-02-18 | 天津职业技术师范大学 | A kind of portable pressure bar stabilization experiment teaching aid |
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