CN210465178U - Experimental device for frictional wear of orthodontic correction square arch wire - Google Patents
Experimental device for frictional wear of orthodontic correction square arch wire Download PDFInfo
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- CN210465178U CN210465178U CN201920802397.4U CN201920802397U CN210465178U CN 210465178 U CN210465178 U CN 210465178U CN 201920802397 U CN201920802397 U CN 201920802397U CN 210465178 U CN210465178 U CN 210465178U
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Abstract
The utility model discloses an experimental device for the frictional wear of an orthodontic correction square arch wire, which comprises a square arch wire for orthodontic correction, an experimental table board, a square arch wire fixing and pre-tightening mechanism which is fixedly connected on the experimental table board and used for fixing and straightening the square arch wire, a friction testing mechanism which is positioned on one side of the square arch wire fixing and pre-tightening mechanism, is fixedly arranged on the experimental table board and is provided with a cantilever beam and applies load to the square arch wire through the cantilever beam, and a data acquisition system which is connected with the cantilever beam and used for measuring data after the stress feedback of the cantilever beam; the clamping and pre-tightening of the square arch wire are realized through the square arch wire fixing and pre-tightening mechanism, the square arch wire is positioned, the square arch wire can simulate different working states of a contact angle, a rotation angle and a torsion angle, load information and friction force information between the square arch wire and a bracket are collected, a friction coefficient is obtained through calculation, and a more reliable and effective simulation process is provided for research on the friction and wear performance of a square arch wire bracket.
Description
Technical Field
The utility model relates to an orthodontic research equipment field especially relates to an orthodontic side arch wire frictional wear experimental apparatus that corrects.
Background
As a common clinical symptom, malocclusion not only causes abnormal oral cavity function and easily causes diseases, but also seriously affects the beauty, so that the correction of malocclusion is more and more popular among people in the modern society with high civilization development.
In orthodontic treatment, one of the most important treatment methods is to use a dental appliance composed of an archwire and brackets, and the frictional wear performance of the archwire brackets is one of the important research points of orthodontics. The friction force between the arch wire brackets is reduced as much as possible by selecting proper arch wire bracket materials, specifications (such as a square arch wire or a round arch wire), surface processing methods, fixing modes and load sizes, so that the treatment efficiency can be greatly improved, and the periodontal damage can be reduced. Therefore, the relative sliding condition of the arch wire brackets in the actual working state is simulated, the friction force among the arch wire brackets is accurately measured, and a powerful basis can be provided for the design and manufacture of the arch wire brackets and the related research of orthodontic treatment and orthodontics of stomatologists.
In the research of the frictional wear of the square arch wire and the bracket, most of the existing friction experiment devices can only measure the friction condition when the square arch wire and the bracket are in right-to-right friction. However, when the square arch wire and the bracket are used in the oral cavity, the square arch wire is inevitably twisted or misplaced with the bracket, and a certain contact angle, a certain rotation angle or a certain twisting angle is formed, so that the existing measuring equipment cannot measure accurately.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of above-mentioned prior art, the utility model aims at providing an orthodontic correction side arch wire friction wear experimental apparatus aims at solving the problem of the contact angle, the rotation angle and the angle of torsion that can't accurate simulation side arch wire twist reverse or misplace the back and produce among the current experimental facilities.
The technical scheme of the utility model as follows:
an experimental device for frictional wear of a square arch wire for orthodontic correction comprises a square arch wire for orthodontic correction, an experimental table top, a square arch wire fixing and pre-tightening mechanism which is fixedly connected to the experimental table top and used for fixing and straightening the pre-tightened square arch wire, a friction testing mechanism which is positioned on one side of the square arch wire fixing and pre-tightening mechanism, is fixedly arranged on the experimental table top and is provided with a cantilever beam and applies load to the square arch wire through the cantilever beam, and a data acquisition system which is connected with the cantilever beam and used for measuring data after force feedback of the cantilever beam;
the square arch wire fixing and pre-tightening mechanism comprises a first pre-tightening component which is fixedly connected with one end of a square arch wire and drives the square arch wire to translate and rotate, and a second pre-tightening component which is fixedly connected with the other end of the square arch wire and drives the square arch wire to translate and rotate.
The friction testing mechanism drives the cantilever beam to rub the square arch wire in a reciprocating mode along the length direction of the square arch wire.
Furthermore, the first pre-tightening assembly comprises a three-axis displacement table with a three-direction micrometer, a rotating table fixedly connected to the displacement output end of the three-axis displacement table and provided with a B-axis micrometer, an installation platform fixedly installed on the rotating table and provided with a through groove, and a fixed pressing plate fixedly connected to the installation platform and used for pressing and fixing the square arch wire on the installation platform;
the three-direction micrometer comprises a Y-axis micrometer used for controlling the output end of the three-axis displacement table to move towards the extension direction of the square arch wire, an X-axis micrometer used for controlling the output end of the three-axis displacement table to move towards the direction vertical to the experimental table top and the direction vertical to the extension direction of the square arch wire, and a Z-axis micrometer used for controlling the output end of the three-axis displacement table to move towards the direction vertical to the experimental table top.
Further, the through groove on the mounting platform is opposite to the circle center of the rotating platform.
Further, the second pre-tightening assembly is identical to the first pre-tightening assembly in structure.
The bracket surface is in contact with the square arch wire and rubs back and forth along the length direction of the square arch wire.
Further, the second pre-tightening assembly is installed in parallel with the first pre-tightening assembly, and the rotating platform of the first pre-tightening assembly is opposite to the surface of the rotating platform of the second pre-tightening assembly in orientation.
Furthermore, the friction testing mechanism comprises a friction triaxial displacement table fixed on the experimental table surface, a cantilever beam fixedly connected on the displacement output end of the friction triaxial displacement table, a placing table fixedly connected at the tail end of the cantilever beam and in a concave shape, a bracket fixing block fixedly connected in a groove of the placing table, and a bracket positioned in the groove of the placing table and fixedly connected on the bracket fixing block;
the bracket surface is in contact with the square arch wire and rubs back and forth along the length direction of the square arch wire.
Furthermore, a motor is fixedly connected to a moving shaft which is arranged on the friction three-shaft displacement table and used for controlling the displacement output end to move along the length direction of the square arch wire, and a motor controller used for controlling the motor is electrically connected to the motor.
Furthermore, the data acquisition system comprises a plurality of force sensors fixedly arranged on the cantilever beam, a bridge box electrically connected with the force sensors, a strain amplifier electrically connected with the bridge box, a data acquisition unit electrically connected with the strain amplifier, and a computer electrically connected with the data acquisition unit.
A test method of the square arch wire bracket friction wear experimental device comprises the following steps:
clamping and fixing the bracket;
clamping and fixing an opposite arch wire;
applying pretightening force to the square arch wire through the square arch wire fixing pretightening mechanism;
adjusting the square arch wire fixing and pre-tightening mechanism to realize the working condition simulation of the square arch wire;
the bracket is contacted with the square arch wire, and load application is carried out;
starting a friction testing mechanism to perform reciprocating friction between the opposite arch wire and the bracket;
the data acquisition system acquires load information and friction force information and obtains a friction coefficient through software calculation.
Furthermore, the adjusting square arch wire fixing pre-tightening mechanism realizes concrete working condition simulation in the square arch wire working condition simulation, and the concrete working condition simulation comprises contact angle simulation, rotation angle simulation and torsion angle simulation.
Compared with the prior art, the utility model discloses a fixed pretension mechanism of side arch wire realizes the clamping and the pretension of side arch wire to fix a position the side arch wire, make the side arch wire can simulate different contact angle, rotation angle and torsion angle operating condition, and through gathering load information and frictional force information between side arch wire and the support groove calculate and obtain coefficient of friction, support the groove frictional wear performance research for the side arch wire and provide a more reliable effectual simulation experiment method.
Drawings
Fig. 1 is a schematic structural view of an experimental device for frictional wear of an orthodontics correcting square arch wire of the utility model.
Fig. 2 is a schematic structural view of a square arch wire fixing and pre-tightening mechanism in the embodiment of the present invention.
Fig. 3 is a partial schematic view of the structure of the mounting platform according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a friction testing mechanism in an embodiment of the present invention.
Fig. 5 is a flowchart of an experimental method of the experimental device based on the frictional wear of the square archwire bracket in the embodiment.
In the figure: 2. a square arch wire; 3. a square arch wire fixing and pre-tightening mechanism; 5. a friction testing mechanism; 6. a data acquisition system; 31. a first pre-tightening assembly; 32. a second pre-tightening assembly; 311. a three-axis displacement stage; 312. y-axis decitex; 313. an X-axis micrometer; 314. a Z-axis micrometer; 315. b-axis micrometer; 316. a rotating table; 317. mounting a platform; 318. a through groove; 319. fixing the pressing plate; 321. a second Y-axis decimeter; 322. a second X-axis decimeter; 323. a second Z-axis decimeter; 324. a second B-axis decimetric card; 51. rubbing a three-axis displacement table; 512. an electric motor; 513. a motor controller; 52. a cantilever beam; 53. a placing table; 54. a pin; 55. bracket fixing blocks; 56. a bracket; 61. a force sensor; 62. a bridge box; 63. a strain amplifier; 64. a data acquisition unit; 65. and (4) a computer.
Detailed Description
The utility model provides an experimental device for frictional wear of an orthodontic correction square arch wire, which is used for making the purpose, the technical scheme and the effect of the utility model are clearer and clearer, and the following is right by referring to the attached drawings and taking examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, the utility model provides an orthodontic correction side arch wire friction wear experimental apparatus, including the side arch wire 2 that is used for orthodontic correction, the experiment mesa (not drawn in the figure) that the level was placed, fixed connection just fixes pretension mechanism 3 on the experiment mesa and the side arch wire of pretension side arch wire 2, be located one side of the fixed pretension mechanism 3 of side arch wire and have cantilever beam 52 and exert the friction test mechanism 5 of load for side arch wire 2 through cantilever beam 52 to and the atress feedback through cantilever beam 52 is used for measuring data's data acquisition system 6. The square arch wire fixing and pre-tightening mechanism 3 comprises a first pre-tightening component 31 and a second pre-tightening component 32, the first pre-tightening component 31 and the second pre-tightening component 32 are respectively positioned at two ends of the square arch wire 2 and horizontally straighten the square arch wire 2, the friction testing mechanism 5 with the cantilever beam 52 repeatedly rubs the square arch wire 2 to enable the cantilever beam 52 to deform under stress, and then the data acquisition system 6 detects the stress feedback of the cantilever beam 52 to analyze and obtain the friction data of the square arch wire 2.
As shown in fig. 1, 2 and 3, the first pre-tightening assembly 31 is fixedly installed on the experimental table top by screws, the first pre-tightening assembly 31 includes a three-axis displacement table 311 with three-direction decimeters, the three-axis displacement table 311 with three-direction decimeters is a conventional technical means in the field, the specific structure is not described in detail, the principle is that the movement of the output end of the three-axis displacement table along the X-axis, Y-axis and Z-axis directions is realized by rotating the three-direction decimeters, in this embodiment, the three-direction decimeters are respectively a Y-axis decimeter 312 for controlling the output end of the three-axis displacement table 311 to move towards the extending direction of the square arch wire 2, an X-axis decimeter 313 for controlling the output end of the three-axis displacement table 311 to move towards the direction parallel to the experimental table top and perpendicular to the extending direction of the square arch wire 2, and a Z-axis decimeter 314 for controlling the output end of the three-axis displacement table 311 to move towards the direction perpendicular to the experimental table top, for convenience of description, the direction which faces to the experimental table top and is vertical to the extending direction of the square arch wire 2 is specified to be the X-axis direction, the extending direction of the square arch wire 2 is specified to be the Y-axis direction, and the direction which faces to the experimental table top and is vertical to the Z-axis direction; a rotating table 316 with a B-axis micrometer 315 is fixedly connected to the displacement output end of the three-axis displacement table 311 through a screw, and the rotating table 316 rotates by screwing the B-axis micrometer 315; the installation platform 317 is fixedly connected to the rotary table 316 through a screw, the installation platform 317 is perpendicular to the surface of the rotary table 316, a through groove 318 is formed in the upper surface of the installation platform 317, the through groove 318 in the installation platform 317 is opposite to the circle center of the rotary table 316, a fixed pressing plate 319 is fixedly connected to the installation platform 317 through a screw, the fixed pressing plate 319 is used for pressing and fixing the square arch wire 2 on the installation platform 317, the square arch wire 2 is pressed in the through groove 318 through the fixed pressing plate 319, and when the rotary table 316 rotates, the through groove 318 in the installation platform 317 only rotates for a certain angle without linear movement.
The second pre-tightening component 32 has the same structure as the first pre-tightening component 31, and for convenience of functional description, three-direction decimeters in the second pre-tightening component 32 are named as a second Y-axis decimeter 321 for controlling the output end of the three-axis displacement table 311 to move towards the extending direction of the square arch wire 2, a second X-axis decimeter 322 for controlling the output end of the three-axis displacement table 311 to move towards the direction perpendicular to the experimental table top and the extending direction of the square arch wire 2, a second Z-axis decimeter 323 for controlling the output end of the three-axis displacement table 311 to move towards the direction perpendicular to the experimental table top, and a second B-axis decimeter 324 for controlling the rotation table 316 in the second pre-tightening component 32 to rotate.
The second pretensioning assembly 32 is mounted in parallel with the first pretensioning assembly 31, and the rotary table of the first pretensioning assembly 31 faces the surface of the rotary table 316 of the second pretensioning assembly 32.
As shown in fig. 1 and 4, the friction testing mechanism 5 includes a friction triaxial displacement table 51 fixed on the experimental table top by screws, the friction triaxial displacement table 51 is a conventional triaxial displacement table assembly, a cantilever beam 52 is fixedly connected to a moving output end of the friction triaxial displacement table 51 by screws, the cantilever beam 52 is located between the second pre-tightening assembly 32 and the first pre-tightening assembly 31 and is perpendicular to the direction arch wire 2, a motor 512 is fixedly connected to a moving shaft on the friction triaxial displacement table 51 for controlling the moving output end to move along the length direction of the direction arch wire 2, a motor controller 513 is electrically connected to the motor 512, the motor 512 is a three-phase stepping motor, the three-phase stepping motor controller 513 can realize accurate control of the speed of the motor 512, and the cantilever beam 52 connected to the friction triaxial displacement table 51 can realize automatic translation along the length direction of the direction arch wire 2, manual operation is avoided, and the subsequent friction process is accurately controlled; the movement in the other two directions is controlled manually on the frictional triaxial displacement table 51 by means of a decitex gauge.
One end of the cantilever beam 52 is fixedly connected to the friction triaxial displacement table 51 through a screw, the other end of the cantilever beam protrudes out of the friction triaxial displacement table 51 and is the tail end of the cantilever beam 52, the tail end of the cantilever beam 52 is fixedly connected with a placing table 53 through a screw, a groove is formed in the middle of the placing table 53, the outline is in a concave shape, a bracket fixing block 55 is fixedly connected in the groove of the placing table 53 through a pin 54, the pin 54 penetrates through two side walls of the groove and the bracket fixing block 55, the bracket fixing block 55 is clamped and embedded in the groove of the placing table 53, a bracket 56 is bonded at the middle position on the bracket fixing block 55, the bracket 56 is positioned below the square arch wire 2 and is contacted with the square arch wire 2, under the normal working condition simulation condition, the length direction of the square arch wire 2 is vertical to; in the actual orthodontic process, the brackets 56 are bonded to the tooth surfaces, and the brackets 56 are tightened by the square archwire 2 to be in the fitted positions, so that the teeth are straightened.
When the friction triaxial displacement table 51 is started to work, the cantilever beam 52 is driven to reciprocate along the length direction of the square arch wire 2, and then the bracket 56 is driven to rub the square arch wire 2, so as to simulate a friction environment, wherein the working state is a normal working condition simulation.
As shown in fig. 1, 2 and 4, the square arch wire fixing and pre-tightening mechanism 3 provides various working condition simulations of the square arch wire 2, and the following working condition simulations are only used for explaining the embodiment of the present invention, but are not limited to the following ones; the X-axis direction, the Y-axis direction, and the Z-axis direction described below are directions in which the lower arch wire 2 is laid under normal condition simulation conditions, i.e., the X-axis direction, the Y-axis direction, and the Z-axis direction specified above.
And (3) simulating a contact angle, wherein in order to realize the simulation of the friction state of the square arch wire 2 under different contact angles, the direction of the square arch wire 2 under the working condition needs to form a certain angle with the Y-axis direction. And adjusting an X-axis micrometer 313 or a second X-axis micrometer 322 in the screwing square arch wire fixing and pre-tightening mechanism 3 to drive one end of the square arch wire 2 to move in the X-axis direction, and the other end of the square arch wire 2 is fixed. After being adjusted in place, the square arch wire 2 forms a certain angle with the Y axis, and the angle is called a contact angle. Because the micrometer is marked with scales, the size of the contact angle can be calculated by a trigonometric function calculation method. The operating condition of the bracket 56 rubbing against the archwire 2 in the presence of a contact angle is a contact angle simulation.
In order to simulate the frictional state of the square arch wire 2 at different rotation angles, the square arch wire 2 needs to be rotated by a certain angle on the Y axis. And adjusting a first B-axis micrometer 315 and a second B-axis micrometer 324 in the square arch wire fixing and pre-tightening mechanism 3 to drive the first pre-tightening component 31 and the rotary table 316 in the second pre-tightening component 32 to rotate at the same angle at the same time and drive the square arch wire 2 fixed on the rotary table 316 to rotate at a designated angle on the Y axis. After adjustment into position, the square archwire 2 is rotated on the Y-axis by an angle, referred to as a rotation angle, and the operation of the bracket 56 to rub the square archwire 2 in the presence of a rotation angle is simulated as a rotation angle.
In order to simulate the friction state of the square arch wire 2 at different torsion angles, the square arch wire 2 needs to be twisted. The twisting embodiments include two types: the first is to adjust the first B-axis micrometer 315 or the second B-axis micrometer 324 in the square arch wire fixing and pre-tightening mechanism 3, so that the corresponding rotary table 316 rotates for a certain angle, while the other rotary table 316 is fixed, and the square arch wire 2 is twisted to form a twisting angle; secondly, a first B-axis micrometer 315 and a second B-axis micrometer 324 in the square arch wire fixing and pre-tightening device 3 are adjusted, so that the two rotating platforms 316 rotate at different angles at the same time, and the square arch wire 2 is twisted to form a twisting angle. The operating conditions under which the brackets 56 are caused to rub against the archwire 2 in the presence of a twist angle are twist angle simulations.
As shown in fig. 1, the data acquisition system 6 includes a plurality of force sensors 61 fixedly attached to the cantilever beam 52, in this embodiment, there are 4 force sensors 61, the force sensors 61 are disposed on the upper and lower surfaces and the side surfaces of the two sides of the cantilever beam 52, a bridge box 62 is electrically connected to the force sensors 61, the bridge box 62 is mainly used for measuring a change in a dc resistance value of the force sensors 61, the bridge box 62 is electrically connected to a strain amplifier 63, the strain amplifier 63 is used for performing undistorted amplification on an amplitude-modulated voltage sent from the bridge box 62, a data collector 64 is electrically connected to the strain amplifier 63, the data collector 64 is used for converting an analog signal into a digital signal, the data collector 64 is electrically connected to a computer 65, and the computer 65 processes and analyzes the data to obtain a load, a friction force and a friction coefficient. The computer 65 is electrically connected with and controls the motor controller 513, so that the motor 512 can be accurately controlled by the computer 65, the reciprocating motion of the cantilever beam 52 and the friction generated by the square arch wire 2 can be accurately controlled according to the requirement of the data acquisition system 6, and the relative position and the relative pressure between the square arch wire 2 and the bracket 56 can be accurately controlled.
The working process of the experimental device for the frictional wear of the orthodontic correction square arch wire comprises the following steps:
the square arch wire 2 is fixedly arranged on the first pre-tightening component 31 and the second pre-tightening component 32, and the moving output ends of the two three-axis displacement tables 311 on the first pre-tightening component 31 and the second pre-tightening component 32 move away from each other along the extending direction of the square arch wire 2 by screwing and adjusting the Y-axis micrometer 312 and the second Y-axis micrometer 321, so that the square arch wire 2 is straightened and tightened to apply pre-tightening force.
The adjusting square arch wire fixing and pre-tightening mechanism 3 realizes the simulation of different working conditions of the square arch wire 2, controls the cantilever beam 52 to contact upwards and push against the square arch wire 2 by adjusting the friction three-axis displacement table 51, applies a certain load between the square arch wire 2 and the bracket 56, is started after the movement parameters of the motor 512 are set, and drives the shaft of the friction three-axis displacement table 51 along the length direction of the square arch wire 2 to start forward and backward rotation by the motor 512, so that the cantilever beam 52 is driven by the friction three-axis displacement table 51 to drive the bracket 56 to do low-speed reciprocating friction movement relative to the square arch wire 2. The data acquisition system 6 displays and records the stress value of the cantilever beam 52 in a voltage value form in real time through a strain gauge on the force sensor 61, and calculates and obtains the load, the friction force and the friction coefficient between the corresponding square arch wire 22 and the bracket 56.
As shown in fig. 5, the present solution further provides an experimental method based on the experimental device for frictional wear of the square archwire bracket, which comprises the following steps:
s10, clamping and fixing the bracket; the concrete process does, the pin will hold in the palm the groove that the groove fixed block was fixed and place the platform in, hold in the palm the groove fixed block in, then adjust friction triaxial displacement platform, make the side arch wire accomplish the correct contact with holding in the palm the groove, hold in the palm the groove and adjust friction triaxial displacement platform this moment and make and hold in the palm the groove fixed block and descend to have the certain distance with holding in the palm the groove bottom with tweezers centre gripping, it adjusts friction triaxial displacement platform to drip 1~2 after dripping glue on holding in the palm the groove fixed block, make and hold in the palm groove fixed block and hold in the palm the groove bottom and contact with the correct of side arch.
S20, clamping and fixing an opposite arch wire; the specific process is that one end of a square arch wire is arranged in a through groove on a mounting platform of a first pressing component and is fixed by a fixing pressing plate, and then the other end of the square arch wire is arranged on a mounting platform of a second pressing component to complete the fixing of the square arch wire.
S30, applying pretightening force to the opposite arch wire through the fixed pretightening mechanism of the opposite arch wire; the specific process is that the Y-axis micrometer and the second Y-axis micrometer are adjusted by screwing on the first pre-tightening component and the second pre-tightening component, so that the moving output ends of the two three-axis displacement tables on the first pre-tightening component and the second pre-tightening component move away from each other along the direction of the square arch wire, and the square arch wire is straightened and tightened to apply pre-tightening force, and pre-tightening of the square arch wire is completed. Scales are marked on the micrometer caliper, and the pre-tightening force can be accurately controlled after the pre-tightening force is calibrated in advance.
S40, adjusting the square arch wire fixing and pre-tightening mechanism to realize the working condition simulation of the square arch wire; the working condition simulation comprises three working condition simulations, and the concrete steps are as follows:
and (3) simulating a contact angle, namely driving one end of the square arch wire to move in the X-axis direction and the other end of the square arch wire to be fixed by adjusting and screwing an X-axis micrometer clamp or a second X-axis micrometer clamp in the square arch wire fixing and pre-tightening mechanism. After being adjusted in place, the square arch wire forms a certain angle with the Y axis, and the angle is called a contact angle.
And (3) simulating a rotation angle, namely adjusting a first B-axis micrometer and a second B-axis micrometer in the square arch wire fixing and pre-tightening mechanism, driving a rotating platform in the first pre-tightening component and the second pre-tightening component to rotate at the same angle, and driving the square arch wire fixed on the rotating platform to rotate at a specified angle on the Y axis. After being adjusted in place, the square archwire is rotated through an angle in the Y-axis, which is referred to as the angle of rotation.
And (3) torsion angle simulation, namely, the square arch wire needs to be twisted in order to realize the friction state simulation of the square arch wire under different torsion angles. The twisting embodiments include two types: the first is to adjust the first B-axis micrometer or the second B-axis micrometer in the square arch wire fixing and pre-tightening mechanism, so that the corresponding rotating platform rotates for a certain angle, while the other rotating platform is fixed, and the square arch wire is twisted to form a twisting angle; and the second type is to adjust a first B-axis micrometer and a second B-axis micrometer in the square arch wire fixing and pre-tightening device, so that the two rotating tables rotate at different angles simultaneously, and the square arch wire is twisted to form a twisting angle.
S50, enabling the bracket to be in contact with the square arch wire and applying load; the specific process is that the friction triaxial displacement table is adjusted to control the cantilever beam to contact upwards and push the square arch wire, so that a certain load is applied between the square arch wire and the bracket.
S60, starting a friction testing mechanism to rub the opposite arch wire and the bracket in a reciprocating manner; after the motion parameters of the motor are set, the motor is started, and the motor drives the shaft of the displacement output end of the friction three-axis displacement platform to move along the length direction of the square arch wire, so that the cantilever beam is driven to drive the bracket to do low-speed reciprocating friction motion relative to the square arch wire.
S70, acquiring load information and friction force information by the data acquisition system and calculating by software to obtain a friction coefficient; the data acquisition system displays and records the stress value of the cantilever beam in a voltage value form in real time through a strain gauge on the force sensor, and obtains the load, the friction force and the friction coefficient between the corresponding square arch wire and the corresponding bracket through software analysis and calculation.
The utility model discloses a carry out the friction test of side arch wire and support groove on the orthodontic correction side arch wire friction wear experimental apparatus of oral cavity, through the clamping and the pretension that the fixed pretension mechanism of side arch wire realized the side arch wire to fix a position the side arch wire, make different contact angle, rotation angle and torsion angle operating condition can be simulated to the side arch wire, through gathering load information and frictional force information between side arch wire and the support groove calculate and obtain coefficient of friction, provide a more reliable effectual simulation experiment method for the research of side arch wire support groove friction wear performance.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. The experimental device for the frictional wear of the square arch wire for the orthodontic correction comprises the square arch wire for the orthodontic correction of teeth, an experimental table top and a data acquisition system, and is characterized by further comprising a square arch wire fixing and pre-tightening mechanism which is fixedly connected to the experimental table top and is used for fixing and straightening the pre-tightened square arch wire, a friction testing mechanism which is positioned on one side of the square arch wire fixing and pre-tightening mechanism, is fixedly arranged on the experimental table top and is provided with a cantilever beam and applies load to the square arch wire through the cantilever beam, and the data acquisition system is connected with the cantilever beam and is used for measuring data after being fed back through the stress of;
the square arch wire fixing and pre-tightening mechanism comprises a first pre-tightening component which is fixedly connected with one end of a square arch wire and drives the square arch wire to translate and rotate, and a second pre-tightening component which is fixedly connected with the other end of the square arch wire and drives the square arch wire to translate and rotate;
the friction testing mechanism drives the cantilever beam to rub the square arch wire in a reciprocating mode along the length direction of the square arch wire.
2. The experimental device for the frictional wear of the orthodontic correction square arch wire according to claim 1, wherein the first pre-tightening assembly comprises a three-axis displacement table with three-directional micrometer calipers, a rotating table fixedly connected to a displacement output end of the three-axis displacement table and provided with a B-axis micrometer calipers, a mounting platform fixedly mounted on the rotating table and provided with a through groove, and a fixing pressure plate fixedly connected to the mounting platform and used for pressing and fixing the square arch wire on the mounting platform;
the three-direction micrometer is respectively as follows: the device comprises a Y-axis micrometer for controlling the output end of a three-axis displacement table to move towards the extension direction of a square arch wire, an X-axis micrometer for controlling the output end of the three-axis displacement table to move towards the direction vertical to an experimental table top and the direction vertical to the extension direction of the square arch wire, and a Z-axis micrometer for controlling the output end of the three-axis displacement table to move towards the direction vertical to the experimental table top.
3. The experimental device for the frictional wear of the orthodontic corrective square arch wire according to claim 2, wherein the through groove on the mounting platform is opposite to the center of the rotating platform.
4. The orthodontic correction archwire frictional wear test apparatus of claim 3 wherein the second pretensioning assembly is identical in construction to the first pretensioning assembly.
5. The orthodontic correction archwire frictional wear test apparatus of claim 3, wherein the second pretensioning assembly is mounted in parallel with the first pretensioning assembly structure, and the rotary table of the first pretensioning assembly faces the surface of the rotary table of the second pretensioning assembly.
6. The experimental device for the frictional wear of the orthodontics correcting square arch wire according to claim 1, wherein the friction testing mechanism comprises a friction triaxial displacement table fixed on the experimental table surface, a cantilever beam fixedly connected to the displacement output end of the friction triaxial displacement table, a placing table fixedly connected to the tail end of the cantilever beam and having a 'concave' shape, a bracket fixing block fixedly connected in a groove of the placing table, and a bracket located in the groove of the placing table and fixedly connected to the bracket fixing block;
the bracket surface is in contact with the square arch wire and rubs back and forth along the length direction of the square arch wire.
7. The experimental device for the frictional wear of the orthodontic corrective square arch wire according to claim 6, wherein a motor is fixedly connected to a moving shaft of the frictional three-shaft displacement table, the moving shaft controlling the displacement output end to move along the length direction of the square arch wire, and a motor controller for controlling the motor is electrically connected to the motor.
8. The experimental apparatus for the frictional wear of the orthodontic corrective square arch wire according to claim 5, wherein the data acquisition system comprises a plurality of force sensors fixedly mounted on the cantilever beam, a bridge box electrically connected with the force sensors, a strain amplifier electrically connected with the bridge box, a data collector electrically connected with the strain amplifier, and a computer electrically connected with the data collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186797A (en) * | 2019-05-30 | 2019-08-30 | 深圳大学 | A kind of mouth cavity orthodontic correction side arch wire frictional wear experimental device and its experimental method |
| CN115060616A (en) * | 2022-06-17 | 2022-09-16 | 广东省医疗器械质量监督检验所 | Flexible centering wear device for testing wear resistance of orthodontic appliance |
| CN110186797B (en) * | 2019-05-30 | 2024-05-10 | 深圳大学 | Orthodontic Fang Gong wire friction and wear experimental device and experimental method thereof |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186797A (en) * | 2019-05-30 | 2019-08-30 | 深圳大学 | A kind of mouth cavity orthodontic correction side arch wire frictional wear experimental device and its experimental method |
| CN110186797B (en) * | 2019-05-30 | 2024-05-10 | 深圳大学 | Orthodontic Fang Gong wire friction and wear experimental device and experimental method thereof |
| CN115060616A (en) * | 2022-06-17 | 2022-09-16 | 广东省医疗器械质量监督检验所 | Flexible centering wear device for testing wear resistance of orthodontic appliance |
| CN115060616B (en) * | 2022-06-17 | 2023-02-03 | 广东省医疗器械质量监督检验所 | Flexible centering wear device for testing wear resistance of orthodontic appliance |
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