CN113866014B - Automatic roll-changing bending test machine - Google Patents
Automatic roll-changing bending test machine Download PDFInfo
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- CN113866014B CN113866014B CN202111141418.0A CN202111141418A CN113866014B CN 113866014 B CN113866014 B CN 113866014B CN 202111141418 A CN202111141418 A CN 202111141418A CN 113866014 B CN113866014 B CN 113866014B
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000005452 bending Methods 0.000 title claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bending tester with automatic roll changing, which comprises a base, an automatic roll changing mechanism, a supporting roll seat, a vertical loading mechanism and a detection component, wherein the automatic roll changing mechanism is arranged at the top end of the base and used for exchanging supporting rolls with four different diameters, the supporting roll seat is symmetrically arranged at one side of the automatic roll changing mechanism and respectively used for supporting a pair of supporting rolls transmitted from the automatic roll changing mechanism, a placing groove for placing the supporting rolls is formed in the top end of the supporting roll seat, the vertical loading mechanism is arranged above the two supporting roll seats and used for vertically loading a test piece positioned on the supporting rolls at the top ends of the two supporting roll seats, and the detection component is arranged on the vertical loading mechanism and used for detecting the bending displacement of the test piece and the test force born by the test piece and transmitting the detected data to a controller. The bending performance of the supporting roller of the test piece under different diameter parameters can be tested, so that the test conditions are richer, and the test result is more accurate.
Description
Technical Field
The invention relates to the technical field of test devices, in particular to a bending tester capable of automatically changing rollers.
Background
In general, materials have many mechanical properties, and in order to test the bending properties of the materials, a three-point bending apparatus is generally used for evaluation. That is, most bending machines use only one diameter parameter of the back-up roll to load the same material or different materials and materials with different properties through the force application roll in most cases. However, in the international document, diameter parameters of four supporting rollers with diameters of 5mm, 10mm, 20mm and 30mm are published, and the influence of the supporting rollers with different diameter parameters on experimental data is not considered in many current three-point bending testers, so that the problem that the development of a supporting roller capable of automatically replacing the supporting rollers with different diameter parameters is a problem which needs to be solved urgently by a person skilled in the art is solved.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an automatic roll-changing bending tester, which can test the bending performance of the supporting rolls made of the same or different materials and having different diameter parameters, so as to make the measurement result more accurate.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a bending tester capable of automatically changing rollers comprises:
a base;
the automatic roll changing mechanism is arranged at the top end of the base and used for changing four supporting rolls with different diameters;
the supporting roller seats are symmetrically arranged on one side of the automatic roller changing mechanism and are respectively used for supporting a pair of supporting rollers transmitted from the automatic roller changing mechanism, and the top ends of the supporting roller seats are provided with placing grooves for placing the supporting rollers;
the vertical loading mechanism is arranged above the two supporting roller seats and is used for vertically loading the test piece on the supporting rollers at the top ends of the two supporting roller seats;
the detection assembly is arranged on the vertical loading mechanism and used for detecting the bending displacement of the test piece and the test force born by the test piece and transmitting the detected data to the controller;
the automatic roll changing mechanism comprises:
the roller warehouse is provided with four placing cavities for placing supporting rollers with different diameters along the axial direction of the roller warehouse, and the four placing cavities are connected above the base through first bearing seats symmetrically arranged at the top end of the base and positioned on one side of the supporting roller seat;
the grooved pulley mechanisms are symmetrically arranged at one side end of the roller warehouse and respectively comprise a driving plate and grooved pulleys, one end of each grooved pulley is connected with the roller warehouse, and through holes communicated with a placing cavity for placing four supporting rollers in the roller warehouse are respectively arranged on the grooved pulleys;
the output ends of the first driving components are respectively connected with the driving plate and used for driving the driving plate to drive the grooved wheel to rotate;
and the output end of the second driving assembly is positioned on one side of the roller library away from the geneva mechanism and is used for pushing the supporting roller positioned in the roller library placing cavity out of the supporting roller seat or adsorbing the supporting roller positioned on the supporting roller seat into the placing cavity of the roller library.
As a further improvement of the present invention, the first driving assembly includes a first motor, a driving wheel connected to an output end of the first motor, and a first driven wheel connected to the driving wheel through a first conveyor belt, the first driven wheel is connected to a first rotating shaft on a second bearing seat disposed at the top end of the base, the other end of the first rotating shaft is connected to a second driven wheel, an end of the first rotating shaft located at one side of the second driven wheel is connected to one of the driving plates, the second driven wheel is connected to a third driven wheel through a second conveyor belt, the third driven wheel is connected to a second rotating shaft on a third bearing seat disposed at the top end of the base, and an end of the second rotating shaft is connected to the other driving plate;
when the first motor drives the driving wheel to drive the first driven wheel, the second driven wheel, the first rotating shaft, the third driven wheel and the second rotating shaft to synchronously rotate, the two driving plates connected with the first rotating shaft and the second rotating shaft synchronously move so as to drive the roller storehouses connected with the two grooved wheels to synchronously rotate;
the second driving assembly comprises a second motor, a third rotating shaft connected with the output end of the second motor and gears connected with two ends of the third rotating shaft, racks meshed with the gears are arranged on the two gears, the end parts of the two racks are sequentially connected with a control part and electromagnetic rods, the control part supplies power to the electromagnetic rods, and the end parts of the two electromagnetic rods can be inserted into four placing cavities arranged on the roller warehouse;
when the second motor drives the third rotating shaft and the two gears to synchronously rotate, the racks above the two gears drive the electromagnetic rods connected with the racks to do telescopic motion, so that the supporting roll placed in the roller warehouse is pushed out to the supporting roll seat or the supporting roll on the supporting roll seat is adsorbed in the placing cavity of the roller warehouse.
As a further improvement of the present invention, the vertical load applying mechanism includes:
the screw rod seats are symmetrically arranged at the top end of the base;
the screw rods are respectively vertically arranged in sliding grooves formed in the viewing inner walls of the screw rod seats;
the movable cross beam is positioned between the two screw rod seats and can slide up and down along the axial direction of the screw rod;
the loading mechanism is arranged on the movable cross beam, is used for vertically loading a test piece on the supporting roller positioned at the top end of the supporting roller seat, and comprises a bracket arranged at the lower end of the movable cross beam and a force application roller positioned at the bottom end of the bracket and connected with the bracket;
and the output end of the third motor is connected with the movable cross beam so as to drive the movable cross beam to slide up and down along the axial directions of the two screw rods.
As a further improvement of the invention, the detection assembly comprises a pressure sensor which is arranged on the loading mechanism and is positioned above the force application roller and an upper laser displacement sensor which is arranged on the loading mechanism and is arranged on one side of the force application roller.
As a further improvement of the invention, the device also comprises a clamping mechanism, wherein the clamping mechanism comprises a supporting frame arranged on the supporting roller seat and a clamping piece movably arranged on the supporting frame and used for clamping the supporting roller placed on the supporting roller seat.
As a further improvement of the invention, the clamping piece comprises an adjusting screw rod which penetrates through the top end of the support frame and is in threaded connection with the support frame, a clamping block which is connected with the bottom end of the adjusting screw rod and a first rocking handle which is connected with the top end of the adjusting screw rod;
when the first rocking handle is pushed to drive the adjusting screw to rotate downwards on the supporting frame, the clamping block clamps the supporting roller placed at the top end of the supporting roller seat.
As a further improvement of the invention, the cross section of the clamping block is V-shaped.
As a further improvement of the invention, the device also comprises a horizontal centering mechanism for adjusting the span between two supporting rollers positioned at the top ends of two supporting roller seats, and comprises:
the bottom plate guide rail is fixed at the top end of the base, and the bottom ends of the two supporting roller seats are transversely connected with the top end of the bottom plate guide rail in a sliding manner;
the turntable is positioned between the two supporting roller seats and is movably arranged at the top end of the guide rail of the bottom plate;
the number of the connecting rods is 2, one end of each connecting rod is connected with the outer wall of each supporting roller seat, and the other end of each connecting rod is connected with the rotary table;
the turntable driving component drives the turntable to rotate;
the graduated scale is used for measuring the span between the supporting rollers positioned at the top ends of the two supporting roller seats;
the graduated scale supporting block is arranged at the top end of the bottom plate guide rail and is respectively positioned at the outer sides of one ends of the two supporting roller seats far away from the automatic roller changing mechanism;
and the clamping blocks are respectively positioned at the top ends of the two scale supporting blocks and used for clamping the two ends of the scale.
As a further improvement of the present invention, the turntable driving assembly comprises:
the fourth rotating shaft is movably connected with a fourth bearing seat arranged on the inner wall of the bottom of the inner cavity of the base;
the first bevel gear is connected with one end of the fourth rotating shaft, and the other end of the fourth rotating shaft penetrates through the outer side wall of the base and is connected with a second rocking handle;
the second bevel gear is arranged at the upper end of the first bevel gear and meshed with the first bevel gear;
the fifth rotating shaft is positioned at the upper end of the second bevel gear and connected with the second bevel gear, and one end of the fifth rotating shaft, which is far away from the second bevel gear, sequentially penetrates through the inner wall of the top end of the base, the bottom plate guide rail and the turntable and then is connected with the turntable;
when the second rocking handle drives the fourth rotating shaft to rotate, the second bevel gear meshed with the first bevel gear is synchronously driven to rotate, so that the fifth rotating shaft drives the rotating disc connected with the fifth rotating shaft to rotate.
Compared with the prior art, the invention has the following beneficial effects:
1. the bending tester capable of automatically changing the roll can test the bending performance of the supporting roll of a test piece under different diameter parameters, so that the test conditions are richer, and the test result is more accurate.
2. According to the bending testing machine with the automatic roll changing function, the horizontal centering mechanism is arranged, so that the span between the two supporting rolls positioned at the top ends of the two supporting roll seats can be adjusted according to test pieces with different sizes or different materials, the bending performance of the materials under different spans can be detected, and the test result is more accurate.
3. The invention provides a bending testing machine capable of automatically changing rollers, which is characterized in that a vertical loading mechanism is arranged to clamp and fix a supporting roller, so that the two supporting rollers can be prevented from being deviated when a test piece placed on the supporting roller is vertically loaded.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of an automatic roll changing mechanism according to the present invention;
FIG. 3 is a schematic view of the vertical loading mechanism of the present invention;
FIG. 4 is a schematic view of a clamping mechanism according to the present invention;
FIG. 5 is a schematic view of the connection of the back-up roll base with the horizontal centering mechanism of the present invention;
FIG. 6 is a schematic structural view of a turntable driving assembly according to the present invention;
FIG. 7 is a schematic top view of the present invention.
In the drawings:
100. a base;
200. an automatic roll changing mechanism; 210. a roller magazine; 220. a first bearing housing; 230. a sheave mechanism; 230-1, a dial; 230-2, sheave; 240. a first drive assembly; 240-1, a first motor; 240-2, a driving wheel; 240-3, a first conveyor belt; 240-4, a first driven wheel; 240-5, a first rotating shaft; 240-6, a second driven wheel; 240-7, a second conveyor belt; 240-8, a third driven wheel; 240-9 and a second rotating shaft; 250. a second drive assembly; 250-1, a second motor; 250-2, a third rotating shaft; 250-3, gear; 250-4, a rack; 250-5, a control component; 250-6, electromagnetic rod;
300. a backup roll base; 310. a limiting hole; 320. a limit bolt;
400. a vertical load mechanism; 410. a screw base; 420. a screw rod; 430. a movable cross beam; 440. a load applying mechanism; 440-1, force application rollers; 450. a third motor;
500. a detection component; 510. a pressure sensor; 520. a laser displacement sensor;
600. a clamping mechanism; 610. a support frame; 620. a clamping member; 620-1, adjusting screw; 620-2, a clamping block; 620-3, a first rocking handle;
700. a horizontal centering mechanism; 710. a floor rail; 720. a turntable; 730. a connecting rod; 740. a turntable drive assembly; 740-1, a fourth rotating shaft; 740-2, a fourth bearing seat; 740-3, a first bevel gear; 740-4, a second bevel gear; 740-5, a fifth rotating shaft; 740-6, a second rocking handle; 750. a graduated scale; 760. a scale supporting block; 770. and (7) clamping blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Fig. 1, 2, 3 and 6 are schematic structural views illustrating an embodiment of a bending tester for automatic roll changing according to the present invention, and a main body of the bending tester includes a base 100, an automatic roll changing mechanism 200, a supporting roll base 300, a vertical loading mechanism 400 and a detection assembly 500.
The base 100 is used to support the automatic roll changing mechanism 200, the backup roll base 300, and the vertical load applying mechanism 400.
The automatic roll changing mechanism 200 is installed at the top end of the base 100 to exchange four kinds of support rolls having different diameters. The automatic roll changing mechanism 200 includes a roll magazine 210, a first bearing housing 220, a geneva mechanism 230, a first drive assembly 240, and a second drive assembly 250. Four placing cavities for placing supporting rollers with different diameters are arranged along the axial direction of the roller base 210, the placing cavities are connected above the base 100 and located at one side of the supporting roller base 300 through first bearing seats 220 symmetrically arranged at the top end of the base 100, sheave mechanisms 230 are symmetrically arranged at one side end of the roller base 210 and respectively comprise a dial 230-1 and a sheave 230-2, one end of the sheave 230-2 is connected with the roller base 210, through holes communicated with the placing cavities for placing the four supporting rollers in the roller base 210 are respectively arranged on the sheaves 230-2, and the output end of a first driving component 240 is respectively connected with the dial 230-1 and is used for driving the dial 230-1 to drive the sheave 230-2 to rotate. One end of the roller storage 210 is welded with the sheave 230-2, the sheave 230-2 is provided with through holes with different calibers, and the other end of the roller storage 210 is connected with the second bearing seat 260. The first driving component 240 drives the two sheave mechanisms 230 to achieve the same indexing purpose, so that the selection of the supporting rollers with four diameter parameters is realized. The output end of the second driving assembly 250 is located at the side of the roller house 210 far away from the geneva gear 230, and is used for pushing out the supporting roller located in the placing cavity of the roller house 210 onto the supporting roller seat 300 or adsorbing the supporting roller located on the supporting roller seat 300 into the placing cavity of the roller house 210. The purpose of the selection or retraction of the support rollers is achieved by the second drive assembly 250.
Specifically, the first driving assembly 240 includes a first motor 240-1, a driving wheel 240-2 connected to an output end of the first motor 240-1, and a first driven wheel 240-4 connected to the driving wheel 240-2 via a first transmission belt 240-3, the first driven wheel 240-4 is connected to a first rotating shaft 240-5 on a second bearing 260 disposed at a top end of the base 100, a second driven wheel 240-6 is connected to the other end of the first rotating shaft 240-5, an end of the first rotating shaft 240-5 located at one side of the second driven wheel 240-6 is connected to one of the driving plates 230-1, the second driven wheel 240-6 is connected to a third driven wheel 240-8 via a second transmission belt 240-7, the third driven wheel 240-8 is connected to a second rotating shaft 240-9 on a third bearing 270 disposed at a top end of the base 100, the end of the second rotary shaft 240-9 is connected to another dial 230-1. When the first motor 240-1 drives the driving wheel 240-2 to drive the first driven wheel 240-4, the second driven wheel 240-6 and the first rotating shaft 240-5, and the third driven wheel 240-8 and the second rotating shaft 240-9 to synchronously rotate, the two driving plates 230-1 connected with the first rotating shaft 240-5 and the second rotating shaft 240-9 synchronously move, so as to drive the roller house 210 connected with the two grooved wheels 230-2 to synchronously rotate.
Specifically, the second driving assembly 250 comprises a second motor 250-1, a third rotating shaft 250-2 connected with an output end of the second motor 250-1 and gears 250-3 connected with two ends of the third rotating shaft 250-2, two racks 250-4 meshed with the gears 250-3 are arranged on the two gears 250-3, end portions of the two racks 250-4 are sequentially connected with a control component 250-5 and electromagnetic rods 250-6, the control component 250-5 supplies power to the electromagnetic rods 250-6, and end portions of the two electromagnetic rods 250-6 can be inserted into four placing cavities arranged on the roller warehouse 210. When the second motor 250-1 drives the third rotating shaft 250-2 and the two gears 250-3 to synchronously rotate, the rack 250-4 located above the two gears 250-3 drives the electromagnetic rod 250-6 connected with the rack to do telescopic motion, so that the supporting roller placed in the roller warehouse 210 is pushed out to the supporting roller seat 300 or the supporting roller on the supporting roller seat 300 is adsorbed into the placing cavity of the roller warehouse 210. When the electromagnetic roller bank 210 works, the control component 250-5 is started to enable the electromagnetic rod 250-6 to work, so that the supporting rollers in the roller bank 210 can be magnetically attracted, then the gear 250-3 and the rack 250-4 are driven to transmit through the second motor 250-1, namely, the two racks 250-4 are controlled to displace back and forth on the gear 250-3, so that the electromagnetic rod 250-6 moves forwards or backwards, the supporting rollers placed in the roller bank 210 are pushed out to the supporting roller seat 300 or the supporting rollers on the supporting roller seat 300 are attracted to a placing cavity of the roller bank 210, and the purposes of selecting and withdrawing the supporting rollers are finally achieved.
The supporting roller base 300 is symmetrically arranged at one side of the automatic roller changing mechanism 200 and is used for supporting a pair of supporting rollers transmitted from the automatic roller changing mechanism 200, and a placing groove for placing the supporting rollers is arranged at the top end of the supporting roller base 300.
The vertical load application mechanism 400 is installed above the two back-up roller holders 300, and is used for vertically applying a test piece on the back-up rollers at the top ends of the two back-up roller holders 300. Specifically, the vertical loading mechanism 400 includes a screw base 410, a screw 420, a movable beam 430, a loading mechanism 440, and a third motor 450. The screw seats 410 are symmetrically arranged at the top end of the base 100, the screw rods 420 are respectively vertically arranged in sliding grooves arranged on the inner walls of the screw seats 410 in a viewing mode, the movable cross beam 430 is arranged between the two screw seats 410 and can slide up and down along the axial direction of the screw rods 420 to apply a load mechanism 440, the movable cross beam 430 is arranged on the movable cross beam and is used for vertically applying a test piece on a supporting roller on the top end of the supporting roller seat 300, the movable cross beam comprises a support arranged at the lower end of the movable cross beam 430 and a force application roller 440-1 arranged at the bottom end of the support and connected with the support, the third motor 450 is arranged on the outer wall of one of the screw seats 410, and the output end of the third motor 450 is connected with the movable cross beam 430 to drive the movable cross beam 430 to slide up and down along the axial direction of the two screw rods 420. The force application roller 440-1 is always kept at the very center of the top end of the base 100 to ensure the accuracy of the force application. The third motor 450 controls the movable beam 430 to lift and lower the screw rods 420 at both ends, thereby pushing the force application roller 440-1 to perform the bending test on the test material on the supporting roller at the top end of the supporting roller base 300.
The detecting assembly 500 is mounted on the vertical loading mechanism 400, and is used for detecting the bending displacement of the test piece and the test force borne by the test piece, and transmitting the detected data to the controller. Specifically, the sensing assembly 500 includes a pressure sensor 510 mounted on the load applying mechanism 440 above the force applying roller 440-1 and an upper laser displacement sensor 520 mounted on the load applying mechanism 440 on the side of the force applying roller 440-1. The bending properties of the material are judged by collecting relevant data with the laser displacement sensor 520 and the pressure sensor 510 and transmitting the collected data to the controller. The laser displacement sensor 520 is arranged above one side of the force application roller 440-1, so that the bending displacement generated after the test piece is loaded can be accurately measured, and the addition of a common deflectometer is avoided, so that the damage condition is caused in the experiment after the test piece is placed for a long time.
With reference to fig. 1, 2, 3 and 6, the automatic roll changing bending test machine of the present embodiment has the following specific use process:
firstly, the first driving assembly 240 drives the two sheave mechanisms 230 and the roller base 210 to synchronously rotate, supporting rollers with four diameter parameters are selected, then the second driving assembly 250 pushes the supporting rollers in the roller base 210 out of a placing groove arranged at the top end of the supporting roller base 300, and then the vertical loading mechanism 400 is used for performing bending tests on the experimental materials on the supporting rollers at the top end of the supporting roller base 300. When supporting rollers with different diameters need to be replaced, the supporting rollers at the top ends of the supporting roller bases 300 are firstly attracted into the roller base 210 again through the second driving assembly 250, and other supporting rollers with different diameters in the roller base 210 are selected and pushed to the top ends of the supporting roller bases 300, so that the bending performance of materials under the supporting roller diameters with different diameters is detected, and the measuring result is more accurate.
Example 2
As shown in fig. 4, in example 2, in addition to example 1, in order to prevent the two support rollers from being displaced when the vertical loading mechanism 400 vertically loads the test piece placed on the support rollers, a clamping mechanism 600 is added to clamp and fix the support rollers. Specifically, the clamping mechanism 600 includes a support frame 610 mounted on the backup roll stand 300 and a clamp 620 movably mounted on the support frame 610 for clamping the backup roll placed on the backup roll stand 300. The clamping member 620 includes an adjustment screw 620-1 penetrating the top end of the support frame 610 and threadedly coupled to the support frame 610, a clamping block 620-2 coupled to the bottom end of the adjustment screw 620-1, and a first crank 620-3 coupled to the top end of the adjustment screw 620-1. When the first rocking handle 620-3 is pushed to drive the adjusting screw 620-1 to rotate downwards on the supporting frame 610, the clamping block 620-2 clamps the supporting roller placed at the top end of the supporting roller seat 300. When the supporting roll seat is used, after the supporting roll seat is replaced, the first rocking handle 620-3 is rotated to drive the adjusting screw 620-1 to move downwards on the supporting frame 610, so that the clamping block 620-2 is driven to move downwards to compress the supporting roll, and the supporting roll on the supporting roll seat 300 is positioned and fixed.
Preferably, in this embodiment, the cross-section of the clamp block 620-2 is V-shaped, which can further achieve a better clamping effect on the support roller and prevent the support roller from largely deviating.
Example 3
As shown in fig. 5, the embodiment 3 further includes a horizontal centering mechanism 700 on the basis of the embodiment 2, and the span between the two support rollers at the top ends of the two support roller bases 300 can be adjusted according to test pieces with different sizes or different materials, so that the bending performance of the materials under different spans can be detected. Specifically, the horizontal centering mechanism 700 includes a base plate guide rail 710, a turntable 720, a link 730, a turntable driving assembly 740, a scale 750, a scale support block 760, and a fixture block 770. The bottom plate guide rail 710 is fixed on the top end of the base 100, the bottom ends of the two supporting roller seats 300 are in sliding connection with a sliding chute which is transversely arranged on the top end of the bottom plate guide rail 710 and is matched with the sliding block, the rotary table 720 is positioned between the two supporting roller seats 300, the two connecting rods 730 are movably mounted at the top end of the bottom plate guide rail 710, one end of each connecting rod 730 is connected with the outer wall of each supporting roller seat 300, the other end of each connecting rod 730 is connected with the rotary table 720, the rotary table driving assembly 740 drives the rotary table 720 to rotate, the scale 750 is used for measuring the span between the supporting rollers at the top ends of the two supporting roller seats 300, the scale supporting blocks 760 are arranged at the top end of the bottom plate guide rail 710 and are respectively located at the outer sides of the ends, far away from the automatic roller changing mechanism 200, of the two supporting roller seats 300, and the fixture blocks 770 are respectively located at the top ends of the two scale supporting blocks 760 and are used for clamping the two ends of the scale 750. Preferably, in the present embodiment, the turntable 720 may be provided as a polygonal turntable to save space. In use, after the clamping mechanism 600 clamps the support roller, the span adjustment is performed. The turntable 720 is driven to rotate by driving the turntable driving assembly 740, so that the link 730 connected to the turntable 720 is moved, and thus the two supporting roller holders 300 connected to the link 730 are moved toward each other or away from each other, and finally a span specified in a test is selected on the scale 750. The span is adjusted by the horizontal centering mechanism 700, always keeping the force application roller 440-1 in the center position. Specifically, the turntable drive assembly 740 includes a fourth rotating shaft 740-1, a first bevel gear 740-3, a second bevel gear 740-4, and a fifth rotating shaft 740-5. The fourth rotating shaft 740-1 is movably connected with a fourth bearing seat 740-2 arranged on the inner wall of the bottom of the cavity in the base 100, a first bevel gear 740-3 is connected with one end of the fourth rotating shaft 740-1, the other end of the fourth rotating shaft 740-1 penetrates through the outer side wall of the base 100 and is connected with a second rocking handle 740-6, a second bevel gear 740-4 is arranged at the upper end of the first bevel gear 740-3 and is meshed with the first bevel gear 740-3, a fifth rotating shaft 740-5 is arranged at the upper end of the second bevel gear 740-4 and is connected with the second bevel gear 740-4, and one end of the fifth rotating shaft 740-5, which is far away from the second bevel gear 740-4, penetrates through the inner wall of the top end of the base 100, the bottom plate guide rail 710 and the rotating disc 720 in sequence and is connected with the rotating disc 720. When the second rocking handle 740-6 drives the fourth rotating shaft 740-1 to rotate, the second bevel gear 740-4 engaged with the first bevel gear 740-3 is synchronously driven to rotate, so that the rotating disc 720 connected with the second rocking handle is driven to rotate through the fifth rotating shaft 740-5. When the device is used, the second rocking handle 740-6 is driven to drive the fourth rotating shaft 740-1 to rotate, the second bevel gear 740-4 meshed with the first bevel gear 740-3 is synchronously driven to rotate, and the rotating disc 720 connected with the fifth rotating shaft 740-5 is driven to rotate through the fifth rotating shaft 740-5, so that the two supporting roller seats 300 are close to or far away from each other, and finally, the span between the two supporting rollers is adjusted.
Preferably, in the present embodiment, after the span is adjusted, in order to prevent the support roller holder 300 from being laterally displaced on the floor rail 710 during the application of a load, the limit holes 310 are formed at the outer ends of both the support roller holders 300, and after the span between both the support rollers is adjusted, the limit bolts 320 are screwed into the limit holes 310 to fix both the support roller holders 300 to the end of the floor rail 710. After the span is adjusted, the limit bolts 320 on the supporting roller base 300 are tightened to fix the supporting roller base 300 on the baseplate guide rail 710, so as to prevent the supporting roller base 300 from generating lateral displacement on the baseplate guide rail 710 during the application of load. After the experiment is finished, if roll replacement is selected, the limiting bolt 330 on the supporting roll seat 300 needs to be loosened, the supporting roll seat 300 is adjusted to the original position by using the horizontal centering mechanism 700, and the steps can be repeated to perform roll replacement.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A bending tester capable of automatically changing rollers is characterized by comprising:
a base (100);
the automatic roll changing mechanism (200) is arranged at the top end of the base (100) and is used for changing four supporting rolls with different diameters;
the supporting roller seats (300) are symmetrically arranged on one side of the automatic roller changing mechanism (200) and are respectively used for supporting a pair of supporting rollers transmitted from the automatic roller changing mechanism (200), and the top ends of the supporting roller seats (300) are provided with placing grooves for placing the supporting rollers;
the vertical loading mechanism (400) is arranged above the two supporting roller seats (300) and is used for vertically loading the test piece on the supporting rollers at the top ends of the two supporting roller seats (300);
the detection assembly (500) is arranged on the vertical loading mechanism (400) and is used for detecting the bending displacement of the test piece and the test force born by the test piece and transmitting the detected data to the controller;
the automatic roll changing mechanism (200) comprises:
the roller warehouse (210) is provided with four placing cavities for placing supporting rollers with different diameters along the axial direction of the roller warehouse (210), and the four placing cavities are connected above the base (100) and positioned on one side of the supporting roller base (300) through first bearing seats (220) symmetrically arranged at the top end of the base (100);
the sheave mechanism (230) is symmetrically arranged at one side end of the roller storage (210) and respectively comprises a driving plate (230-1) and a sheave (230-2), one end of the sheave (230-2) is connected with the roller storage (210), and through holes communicated with a placing cavity for placing four supporting rollers in the roller storage (210) are respectively arranged on the sheave (230-2);
the output ends of the first driving components (240) are respectively connected with the driving plate (230-1) and are used for driving the driving plate (230-1) to drive the grooved wheel (230-2) to rotate;
and the output end of the second driving assembly (250) is positioned on the side of the roller bank (210) far away from the geneva mechanism (230) and is used for pushing the supporting roller positioned in the placing cavity of the roller bank (210) out to the supporting roller seat (300) or adsorbing the supporting roller positioned on the supporting roller seat (300) into the placing cavity of the roller bank (210).
2. The bending tester with automatic roll changing function according to claim 1, wherein: the first driving assembly (240) comprises a first motor (240-1), a driving wheel (240-2) connected with the output end of the first motor (240-1) and a first driven wheel (240-4) connected with the driving wheel (240-2) through a first conveyor belt (240-3), the first driven wheel (240-4) is connected with a first rotating shaft (240-5) on a second bearing seat (260) arranged at the top end of the base (100), the other end of the first rotating shaft (240-5) is connected with a second driven wheel (240-6), the end part of the first rotating shaft (240-5) positioned at one side of the second driven wheel (240-6) is connected with one driving plate (230-1), and the second driven wheel (240-6) is connected with a third driven wheel (240-8) through a second conveyor belt (240-7), the third driven wheel (240-8) is connected with a second rotating shaft (240-9) on a third bearing seat (270) arranged at the top end of the base (100), and the end part of the second rotating shaft (240-9) is connected with another driving plate (230-1);
when a first motor (240-1) drives a driving wheel (240-2) to drive a first driven wheel (240-4), a second driven wheel (240-6), a first rotating shaft (240-5), a third driven wheel (240-8) and a second rotating shaft (240-9) to synchronously rotate, two driving plates (230-1) connected with the first rotating shaft (240-5) and the second rotating shaft (240-9) synchronously move, and therefore a roller bank (210) connected with two grooved wheels (230-2) is driven to synchronously rotate;
the second driving assembly (250) comprises a second motor (250-1), a third rotating shaft (250-2) connected with the output end of the second motor (250-1) and gears (250-3) connected with the two ends of the third rotating shaft (250-2), racks (250-4) meshed with the gears (250-3) are arranged on the two gears (250-3), the end parts of the two racks (250-4) are sequentially connected with a control part (250-5) and electromagnetic rods (250-6), the control part (250-5) supplies power to the electromagnetic rods (250-6), and the end parts of the two electromagnetic rods (250-6) can be inserted into four placing cavities arranged on the roller warehouse (210);
when the second motor (250-1) drives the third rotating shaft (250-2) and the two gears (250-3) to synchronously rotate, the rack (250-4) positioned above the two gears (250-3) drives the electromagnetic rod (250-6) connected with the rack to do telescopic motion, so that the supporting roll placed in the roll warehouse (210) is pushed out to the supporting roll seat (300) or the supporting roll on the supporting roll seat (300) is adsorbed in the placing cavity of the roll warehouse (210).
3. The bending tester with automatic roll change according to claim 1, wherein the vertical load applying mechanism (400) comprises:
the screw rod seats (410) are symmetrically arranged at the top end of the base (100);
the screw rods (420) are respectively and vertically arranged in sliding grooves formed in the inner walls of the screw rod seats (410) in a view mode;
the movable cross beam (430) is positioned between the two screw rod seats (410) and can slide up and down along the axial direction of the screw rod (420);
the loading mechanism (440) is arranged on the movable cross beam (430) and used for vertically loading a test piece on the supporting roller positioned at the top end of the supporting roller seat (300), and comprises a bracket arranged at the lower end of the movable cross beam (430) and a force application roller (440-1) positioned at the bottom end of the bracket and connected with the bracket;
and the third motor (450) is installed on the outer wall of one screw rod seat (410), and the output end of the third motor (450) is connected with the movable cross beam (430) so as to drive the movable cross beam (430) to slide up and down along the axial direction of the two screw rods (420).
4. The bending tester with automatic roll changing function according to claim 1, wherein: the detection assembly (500) comprises a pressure sensor (510) which is arranged on the load applying mechanism (440) and is positioned above the force applying roller (440-1) and an upper laser displacement sensor (520) which is arranged on the load applying mechanism (440) and is arranged on one side of the force applying roller (440-1).
5. The bending tester with automatic roll change of the claim 1 to 4, characterized in that: the supporting roller clamping device further comprises a clamping mechanism (600), wherein the clamping mechanism (600) comprises a supporting frame (610) arranged on the supporting roller seat (300) and a clamping piece (620) movably arranged on the supporting frame (610) and used for clamping the supporting roller placed on the supporting roller seat (300).
6. The bending tester with automatic roll changing function according to claim 5, wherein: the clamping piece (620) comprises an adjusting screw rod (620-1) penetrating through the top end of the support frame (610) and in threaded connection with the support frame (610), a clamping block (620-2) connected with the bottom end of the adjusting screw rod (620-1) and a first rocking handle (620-3) connected with the top end of the adjusting screw rod (620-1);
when the first rocking handle (620-3) is pushed to drive the adjusting screw rod (620-1) to rotate downwards on the supporting frame (610), the clamping block (620-2) clamps the supporting roller placed at the top end of the supporting roller seat (300).
7. The bending tester with automatic roll changing function according to claim 6, wherein: the cross section of the clamping block (620-2) is V-shaped.
8. The bending tester with automatic roll changing according to any one of claims 1 to 4, further comprising a horizontal centering mechanism (700) for adjusting the span between two back-up rolls positioned at the top ends of the two back-up roll stands (300), comprising:
the bottom plate guide rail (710) is fixed at the top end of the base (100), and the bottom ends of the two supporting roller seats (300) are transversely connected with the top end of the bottom plate guide rail (710) in a sliding manner;
the rotating disc (720) is positioned between the two supporting roller seats (300) and is movably arranged at the top end of the bottom plate guide rail (710);
the number of the connecting rods (730) is 2, one end of each of the two connecting rods (730) is connected with the outer wall of each of the two supporting roller seats (300), and the other end of each of the two connecting rods is connected with the rotary table (720);
the turntable driving component (740) drives the turntable (720) to rotate;
a graduated scale (750) for measuring the span between the support rollers at the top ends of the two support roller seats (300);
the scale supporting block (760) is arranged at the top end of the bottom plate guide rail (710) and is respectively positioned at the outer sides of one ends, far away from the automatic roll changing mechanism (200), of the two supporting roll seats (300);
and the fixture blocks (770) are respectively positioned at the top ends of the two scale supporting blocks (760) and used for clamping the two ends of the scale (750).
9. The machine according to claim 8, wherein said carousel drive assembly (740) comprises:
the fourth rotating shaft (740-1) is movably connected with a fourth bearing seat (740-2) arranged on the inner wall of the bottom of the inner cavity of the base (100);
the first bevel gear (740-3) is connected with one end of the fourth rotating shaft (740-1), and the other end of the fourth rotating shaft (740-1) penetrates through the outer side wall of the base (100) and is connected with a second rocking handle (740-6);
a second bevel gear (740-4) provided at an upper end of the first bevel gear (740-3) and engaged with the first bevel gear (740-3);
the fifth rotating shaft (740-5) is positioned at the upper end of the second bevel gear (740-4) and is connected with the second bevel gear (740-4), and one end, far away from the second bevel gear (740-4), of the fifth rotating shaft (740-5) sequentially penetrates through the inner wall of the top end of the base (100), the bottom plate guide rail (710) and the rotating disc (720) and is connected with the rotating disc (720);
when the second rocking handle (740-6) drives the fourth rotating shaft (740-1) to rotate, the second bevel gear (740-4) meshed with the first bevel gear (740-3) is synchronously driven to rotate, so that the fifth rotating shaft (740-5) drives the rotating disc (720) connected with the second bevel gear to rotate.
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| CN202111141418.0A CN113866014B (en) | 2021-09-28 | 2021-09-28 | Automatic roll-changing bending test machine |
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| CN202111141418.0A CN113866014B (en) | 2021-09-28 | 2021-09-28 | Automatic roll-changing bending test machine |
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| CN113866014B true CN113866014B (en) | 2022-05-13 |
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| CN113866014A (en) | 2021-12-31 |
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