CN110763541A - Rut plate forming device with shear resistance testing function - Google Patents
Rut plate forming device with shear resistance testing function Download PDFInfo
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- CN110763541A CN110763541A CN201911157706.8A CN201911157706A CN110763541A CN 110763541 A CN110763541 A CN 110763541A CN 201911157706 A CN201911157706 A CN 201911157706A CN 110763541 A CN110763541 A CN 110763541A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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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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Abstract
The invention belongs to the field of road engineering, and discloses a rut plate forming device with a shear resistance testing function. The device realizes the single-layer and double-layer track plate forming and the anti-shearing performance test thereof, simulates the internal temperature and the interlayer stress state of the asphalt pavement under the actual working condition, solves the problems of complicated forming, inconvenient demoulding, inconsistent stress and temperature of the test piece and the like of the asphalt mixture track plate test piece, improves the forming efficiency of the test piece, reduces the test error of the traditional shearing test, and has wide development prospect.
Description
Technical Field
The invention belongs to the field of road engineering, and relates to a rut plate forming device with a shear resistance testing function.
Background
With the rapid increase of traffic volume, the asphalt pavement is easy to have track, hug, push and other diseases under the long-term action of vehicle load. The diseases are mainly caused by insufficient shear resistance between the asphalt mixture and the pavement layer, so that the shear resistance of the asphalt mixture is usually tested by adopting a single-layer track plate, and the shear resistance between the asphalt pavement layers is tested by adopting a double-layer track plate. However, the problems of complicated manufacturing procedures, difficult demoulding, damage to the internal structure of the test piece and the like exist in the process of forming the test piece; in the test of the interlaminar shear resistance of the asphalt mixture and the asphalt pavement, the problems that the stress and the temperature of a test piece are not consistent with the actual working condition and the like exist.
Disclosure of Invention
The invention aims to overcome the defects that an asphalt mixture rut plate test piece is complicated to mold and inconvenient to demold and the temperature of the rut plate test piece is not in accordance with the reality during a shear test in the prior art, and provides a rut plate molding device with a shear performance test function.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a rut plate forming device with a shear resistance testing function comprises a rolling loading assembly, a forming heating assembly, a supporting and demolding assembly, a movable driving assembly, a driving supporting assembly and a shearing assembly; one end of the rolling loading assembly is slidably connected with the driving support assembly, the other end of the rolling loading assembly is positioned above the forming heating assembly, the bottom of the forming heating assembly is connected with the top end of the supporting demoulding assembly and the top end of the movable driving assembly, the bottom ends of the supporting demoulding assembly and the movable driving assembly are rotatably connected with the driving support assembly, and the shearing assembly is positioned on one side of the forming heating assembly and is connected with the driving support assembly; the rolling loading assembly is used for rolling and forming the heating assembly; the forming heating assembly is used for forming the rut plate and heating the rut plate; the supporting and demoulding assembly is used for supporting the forming heating assembly and demoulding the rut plate formed in the forming heating assembly; the movable driving component is used for driving the forming heating component to rotate; the driving support assembly is used for driving the rolling loading assembly and the shearing assembly; the shearing assembly is used for shearing the formed track plate in the forming heating assembly.
The invention further improves the following steps:
the rolling force control device is characterized by further comprising a control assembly, wherein the control assembly is connected with the rolling loading assembly and the driving supporting assembly and used for controlling the rolling force of the rolling loading assembly for rolling the forming heating assembly, controlling the driving supporting assembly to start or stop driving the rolling loading assembly and the shearing assembly and recording the shearing force of the shearing assembly when a track plate in the forming heating assembly is damaged.
The driving support assembly comprises a driving motor and a bracket; the support comprises a first cross rod, a second cross rod and a vertical rod, the first cross rod is provided with a U-shaped guide groove of a connecting cross rod, the U-shaped guide groove of the connecting cross rod is connected with the rolling loading assembly, and the first cross rod connected with two ends of the U-shaped guide groove of the connecting cross rod is provided with a coil; a groove is formed in the second cross rod, a hemispherical support and a steel wheel track are arranged in the groove, the hemispherical support is connected with the supporting and demolding assembly, the steel wheel track is connected with the movable driving assembly, and the baffle is connected with the top end of the inner wall of the groove and is positioned above the steel wheel track; the vertical rod is provided with a bearing track and a shearing rod track which are both connected with the shearing assembly; the output shaft of the driving motor is connected with the shearing assembly.
The rolling loading assembly comprises a supporting bearing, a rolling wheel and two hydraulic telescopic rods; one ends of the two hydraulic telescopic rods are connected through a supporting bearing; the other end of the connecting cross rod is connected with the connecting cross rod, the connecting cross rod is connected with the U-shaped guide groove of the connecting cross rod in a sliding manner, and the connecting cross rod is made of a magnetic material; the rolling wheel is sleeved on the supporting bearing shaft and is positioned above the forming heating assembly.
The forming heating assembly comprises a first cavity and a second cavity; the top end of the first cavity is positioned below the rolling loading assembly, the bottom end of the first cavity is detachably connected with the top end of the second cavity, and the bottom end of the second cavity is connected with the supporting demolding assembly and the movable driving assembly; a first heating resistance wire is arranged inside the side wall of the first cavity, and a second heating resistance wire is arranged inside the side wall of the second cavity.
The bottom end of the first cavity is connected with the top end of the second cavity through a plurality of bolts, one end of each bolt is connected with the first cavity, and the other end of each bolt is located in a plurality of clamping grooves formed in the outer wall of the second cavity.
The first cavity and the second cavity both comprise an inner cavity and an outer cavity, and two ends of the inner cavity and the outer cavity are respectively connected through a steel plate; the first heating resistance wire and the second heating resistance wire are respectively wound on the outer walls of the inner cavities of the first cavity and the second cavity, and the winding turns of the first heating resistance wire and the second heating resistance wire are sequentially reduced from top to bottom; wire holes are respectively formed in the outer walls of the outer cavities of the first cavity and the second cavity, and one ends of the first heating resistance wire and the second heating resistance wire penetrate through the wire holes to be connected with a power supply.
The supporting demoulding assembly comprises a bottom plate, a hydraulic rod and a control motor; one end of the bottom plate is connected with the forming heating assembly, the other end of the bottom plate is sequentially connected with the hydraulic rod and the control motor, and the bottom plate of the control motor is rotatably connected with the driving support assembly.
The movable driving assembly comprises a plurality of groups of supporting rods, bearings and double-cone steel wheels; one end of the supporting rod is connected with the forming heating assembly, the other end of the supporting rod is connected with the bearing, the double-cone-shaped steel wheel is sleeved on the bearing, and the double-cone-shaped steel wheel is rotatably connected with the driving supporting assembly.
The shearing assembly comprises a shearing pushing head, a bearing, a gear and a shearing rod; the shearing pushing head is connected with one end of the shearing rod, the other end of the shearing rod is connected with the driving support assembly in a sliding mode, a plurality of sawteeth are arranged on the surface of the other end of the shearing rod, the gear is sleeved on one end of the bearing and meshed with the sawteeth on the shearing rod, and the other end of the bearing is connected with the driving support assembly and used for transmitting power output by the driving support assembly to the gear.
Compared with the prior art, the invention has the following beneficial effects:
support through setting up the drive supporting component and roll the loading subassembly and be located the shaping heating element top to for rolling the loading subassembly, portable drive assembly and shearing module provide drive power, and then utilize and roll the loading subassembly and carry out rolling of the inside raw materials of shaping heating element, it is rotatory to drive the shaping heating element through portable drive assembly, accomplish the rut board shaping, realize the inside fashioned rut board drawing of patterns of shaping heating element through supporting drawing of patterns subassembly, realize the shear performance test of shaping rut board through shearing the subassembly. The whole device is simple in structure, the forming process of the rut plate test piece is simple, quick demoulding can be realized by supporting the demoulding component after forming, and demoulding is simple; the forming heating assembly is utilized to heat the internal raw materials, the cutting assembly is used for cutting the formed rut plate, the actual stress condition is simulated, the stress and the temperature of the rut plate are ensured to be consistent with the actual working condition, and the test result is closer to the actual condition; and when testing the self shear strength of the rut plate, the test can be directly carried out in a test mold, so that the rut plate is prevented from being damaged in the demolding process, and the experimental error is effectively reduced.
Further, a control assembly is arranged and used for heating control of the forming heating assembly and driving control of the supporting and demolding assembly and the driving supporting assembly, control accuracy is improved, and control difficulty is reduced.
Furthermore, the forming heating assembly comprises a first cavity and a second cavity, the top end of the first cavity is located below the rolling loading assembly, the bottom end of the first cavity is detachably connected with the top end of the second cavity, the single-layer or double-layer rut plate test piece can be freely selected for forming through the design of the upper layer of cavity and the lower layer of cavity, and particularly when the double-layer rut plate test piece is formed, the forming process is simplified through the forming double-layer rut plate test piece which can be formed at one time and quickly without damage.
Further, first cavity and second cavity all include inner cavity and outer cavity, and first heating resistance wire and second heating resistance wire twine respectively at the inner cavity outer wall of first cavity and second cavity, and the winding number of turns of first heating resistance wire and second heating resistance wire from top to bottom reduces in proper order, heats the rut board and makes it produce temperature gradient, and more real simulation test piece receives the temperature of cutting the in-process at the reality.
Furthermore, the supporting and demoulding assembly comprises a bottom plate, a hydraulic telescopic rod and a control motor; the shaping heating element is connected to bottom plate one end, and the other end connects gradually hydraulic telescoping rod and control motor, and hydraulic telescoping rod is adjusted to the accessible, utilizes the bottom plate directly ejecting the shaping rut board test piece, has realized harmless, the quick drawing of patterns of rut board test piece.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the crush loader assembly of the present invention;
FIG. 3 is a schematic view of the formed heater assembly of the present invention;
FIG. 4 is a cross-sectional view of the support stripper assembly of the present invention;
FIG. 5 is a cross-sectional view of the movable drive assembly of the present invention;
FIG. 6 is a cross-sectional view of the drive support motor of the present invention;
FIG. 7 is a side view of the U-shaped channel of the present invention;
FIG. 8 is a cross-sectional view of the shear assembly of the present invention;
FIG. 9 is a flow chart for making a rut plate according to the present invention;
FIG. 10 is a flow chart of the shear performance test of the present invention.
Wherein: 1-rolling a loading assembly; 1-1-hydraulic telescopic rod; 1-2-supporting bearing; 1-3-rolling wheel; 2-forming the heating component; 2-1-a first cavity; 2-2-a first heating wire; 2-3-bolt; 2-4-card slot; 2-5-a second cavity; 2-6-a second heating resistance wire; 2-7-a first semicircular wire guide; 2-8-a second semicircular wire guide; 3-supporting the demoulding component; 3-1-a bottom plate; 3-2-hydraulic rod; 3-3-controlling the motor; 3-4-hemispherical cavity; 4-a movable drive assembly; 4-1-support bar; 4-2-bearings; 4-3-a biconical steel wheel; 5-driving the support assembly; 5-1-driving the motor; 5-2-scaffold; 5-3-connecting a cross rod U-shaped guide groove; 5-4-hemispherical support; 5-5-steel wheel track; 5-6-baffle; 5-7-coil; 5-8-bearing track; 5-9-shear bar rail; 6-a shearing assembly; 6-1-shearing the pushing head; 6-2-bearing; 6-3-gear; 6-4-shear bar; 7-control assembly.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 8, the rut plate forming device with the shear performance testing function comprises a rolling loading assembly 1, a forming heating assembly 2, a supporting demoulding assembly 3, a movable driving assembly 4, a driving supporting assembly 5, a shearing assembly 6 and a control assembly 7.
Roll 1 one end of loading subassembly and drive 5 sliding connection of supporting component, the other end is located shaping heating element 2 tops, shaping heating element 2 bottoms and 4 tops of portable drive subassembly are connected, 4 bottoms of portable drive subassembly rotate with drive supporting component 5 and be connected, it rotates with drive supporting component 5 to support 3 one end of drawing of patterns subassembly, the other end is connected with shaping heating element 2 bottoms, it just with drive supporting component 5 sliding connection to be located shaping heating element 2 one side and to cut subassembly 6, control assembly 7 is connected with shaping heating element 2 and drive supporting component 5, a drive control who is used for shaping heating element 2's heating control and drive supporting component 5.
The rolling loading assembly 1 is used for rolling and forming the heating assembly 2; the forming heating assembly 2 is used for forming and heating the rut plate; the supporting and demoulding component 3 is used for supporting the forming heating component 2 and demoulding the rut plate formed in the forming heating component 2; the movable driving component 4 is used for driving the forming heating component 2 to rotate; the driving support assembly 5 is used for driving the rolling loading assembly 1 and the shearing assembly 6; the shearing assembly 6 is used for shearing a rut plate in the forming heating assembly 2.
The rolling loading assembly 1 comprises a hydraulic telescopic rod 1-1, a supporting bearing 1-2 and a rolling wheel 1-3; the two hydraulic telescopic rods 1-1 are arranged in parallel front and back, and the lower parts of the two hydraulic telescopic rods 1-1 are connected through a control support bearing 1-2; the upper ends of the two hydraulic telescopic rods 1-1 are welded into a whole through a connecting cross rod, the connecting cross rod is positioned inside a connecting cross rod U-shaped guide groove 5-3 arranged on a first cross rod of the driving support assembly 5, the connecting cross rod can slide in the connecting cross rod U-shaped guide groove 5-3 along the direction of the first cross rod, inward U-shaped bulges are arranged at the top ends of two groove walls of the connecting cross rod U-shaped guide groove 5-3, and a telescopic rod U-shaped guide groove matched with the bulges is arranged at one end, connected with the connecting cross rod, of the hydraulic telescopic rod 1-1; the supporting bearing shaft 1-2 penetrates through the rolling wheel 1-3, two ends of the supporting bearing shaft 1-2 are respectively welded on the two hydraulic telescopic rods 1-1, the rolling wheel 1-3 is driven to move up and down through the supporting bearing shaft 1-2, and the rolling wheel 1-3 is driven to roll left and right in a reciprocating rolling mode to form the asphalt mixture in the heating assembly 2.
The forming heating component 2 consists of a first cavity 2-1 and a second cavity 2-5, the sizes of the inner wall and the outer wall of which are the same, clamping grooves 2-4 are arranged at the middle parts above the four walls of the outer side of the second cavity 2-5, and four bolts 2-3 are respectively inserted into the clamping grooves for controlling the lateral displacement of the first cavity 2-1; the first cavity 2-1 and the second cavity 2-5 penetrate through the bottom plate 3-1 to form a track plate test mold with variable height.
The first cavity 2-1 is a cuboid inner cavity with the size of 300mm multiplied by 50mm formed by sequentially welding four rectangular inner steel plates with the size of 300mm multiplied by 50mm, and a cuboid outer cavity with the size of 350mm multiplied by 50mm formed by sequentially welding four rectangular outer steel plates with the size of 350mm multiplied by 50 mm; the first heating resistance wire 2-2 is wound along the outer side of the inner wall, the number of turns of the wound first heating resistance wire 2-2 is sequentially reduced from top to bottom, so that the first cavity 2-1 generates a temperature gradient when being electrified to generate heat, after the winding is completed, the cuboid inner cavity and the cuboid outer cavity are sealed up and down through steel plate welding, a first semicircular wire hole 2-7 is reserved in the outer wall of the outer cavity parallel to the direction of the shearing assembly 6, and a wire is connected with the driving support assembly 5 through the first semicircular wire hole 2-7 to control the first heating resistance wire 2-2 to be heated.
The size and the forming mode of the second cavity 2-5 are the same as those of the first cavity 2-1, when the second heating resistance wire 2-6 is arranged along the inner wall, the number of turns of the second heating resistance wire 2-6 wound is reduced from the minimum number of the first cavity 2-1 from top to bottom in sequence, the temperature generated by electrifying and heating is ensured to be continuous with the temperature generated by the first cavity 2-1, a second semicircular wire hole 2-8 is reserved on the outer wall parallel to the direction of the shearing component 6, and a wire is connected with the driving support component 5 through the second semicircular wire hole 2-8 to control the heating of the second heating resistance wire 2-6.
The supporting and demoulding component 3 comprises a bottom plate 3-1, a hydraulic rod 3-2 and a control motor 3-3. The size of the bottom plate 3-1 is 295mm multiplied by 20mm, and the bottom plate and the upper end of the hydraulic rod 3-2 are welded into a whole; the vertical extension and contraction of the hydraulic rod 3-2 are controlled by the control motor 3-3 to adjust the height of the bottom plate 3-1, so that the bottom plate 3-1 and the forming heating assembly 2 form a track plate test mold with adjustable height, and the formed test piece can be subjected to nondestructive demolding; the control motor 3-3 is provided with a control motor switch for turning on and off the control motor 3-3, the geometric center of the bottom end of the control motor 3-3 is provided with a hemispherical cavity 3-4, and the hemispherical cavity 3-4 is connected with a spherical component 5-4 arranged on a second cross rod of the driving support component 5 for realizing the rotation of the supporting demoulding component 3.
The movable driving assembly 4 comprises a plurality of groups of supporting rods 4-1, bearings 4-2 and double-cone steel wheels 4-3, four groups are arranged in the embodiment, and one end of each supporting rod 4-1 is welded at four corners of the bottom end of the second cavity 2-5; the middle part of the bearing 4-2 is connected with the other end of the supporting rod 4-1, and two ends of the bearing 4-2 penetrate through the biconical steel wheel 4-3; the biconical steel wheel 4-3 can move along a steel wheel track 5-5 arranged on a second cross rod of the driving support component 5 to control the rotation of the forming heating component 2, and the support rod 4-1 is a cylindrical support rod.
The driving support assembly 5 comprises a driving motor 5-1, a support 5-2, a connecting cross rod U-shaped guide groove 5-3, a hemispherical support 5-4, a steel wheel rail 5-5, a baffle 5-6, a coil 5-7, a bearing rail 5-8 and a shearing rod rail 5-9; the driving motor 5-1 is connected with the control component 7, and the driving motor 5-1 can provide the running power of the whole device through the control of the control component 7; the support 5-2 comprises a first cross rod, a second cross rod and a vertical rod; a U-shaped guide groove 5-3 of a connecting cross rod for the reciprocating motion of a hydraulic telescopic rod 1-1 is arranged on the first cross rod, a second cross rod groove is formed in the second cross rod, a steel wheel track 5-5 for the movement of a double-cone steel wheel 4-3 is arranged in the second cross rod groove, and a hemispherical support 5-4 for supporting the rotation of the demoulding component 3 is arranged in the center of the steel wheel track 5-5; the baffle 5-6 is connected with the inner wall of the groove of the second cross rod, and the baffle 5-6 and the biconical steel wheel 4-3 form an anti-drop mortise and tenon structure for fixing the displacement of the biconical steel wheel 4-3 in the vertical direction; the coils 5-7 are positioned at the left end and the right end of the U-shaped guide groove 5-3 of the connecting cross rod, the coils 5-7 generate magnetic fields to attract the hydraulic telescopic rod 1-1 after being electrified, and the coils 5-7 at the left end and the right end are crossed and electrified to enable the hydraulic telescopic rod 1-1 to do left-right reciprocating motion; the bearing track 5-8 is positioned on the vertical rod and above the shearing rod track 5-9, and the bearing track 5-8 provides a moving track for the bearing 6-2 of the shearing assembly 6; the shear rail 5-9 is located on the vertical bar below the bearing rail 5-8, the shear bar rail 5-8 providing a moving track for the shear bar 6-4 of the shear assembly 6. An output shaft of the driving motor 5-1 is connected with a bearing 6-2 of the shearing assembly 6 and is used for driving the bearing 6-2 to rotate.
The shearing assembly 6 comprises a shearing pushing head 6-1, a bearing 6-2, a gear 6-3 and a shearing rod 6-4; the bearing 6-2 is connected with an output shaft of the driving motor 5-1 and can drive the gear 6-3 to move along the bearing track 5-8; the upper part of the shearing rod 6-4 is in a sawtooth shape, is meshed with the gear 6-3 and can move along the shearing rod track 5-9; the shearing pushing head 6-1 is welded at one end of the shearing rod 6-4, and horizontal thrust is applied to the first cavity 2-1 of the forming heating assembly 2 under the driving of the shearing rod 6-4 to simulate shearing stress applied between pavement layers.
The control component 7 is an electronic computer, the control component 7 is connected with the hydraulic telescopic rod 1-1 of the rolling loading component 1 and is used for controlling the size of the telescopic force of the hydraulic telescopic rod 1-1, and the control component 7 is connected with the driving motor 5-1 of the driving supporting component 5 and is used for controlling the opening and closing of the driving motor 5-1 and the size of the rotating speed; the control component 7 is connected with the two coils 5-7 of the driving support component 5 and is used for realizing the alternate connection of the two coils 5-7 with an alternating current power supply.
The use process or principle of the invention:
1. referring to fig. 9, the process and principle of "rut plate forming" is as follows:
(1) forming and demoulding single-layer track plate
The method comprises the following steps: and heating the components of the rolling wheel 1-3, the bottom plate 3-1, the second cavity 2-5 and the like which are in contact with the asphalt mixture.
Step two: and adjusting a hydraulic rod 3-2 supporting the demoulding component 3 to move upwards, so that the bottom plate 3-1 and the second cavity 2-5 form a track plate test mould. And (3) coating a separant in the second cavity 2-5, taking out the first cavity 2-1 and the four bolts 2-3, and pouring the uniformly mixed asphalt mixture into a test mold.
Step three: adjusting the length of the hydraulic telescopic rod 1-1, putting down the rolling wheel 1-3 by the support bearing 1-2, and contacting the rolling wheel 1-3 with the asphalt mixture; alternating current is alternately conducted on the two coils 5-7 through the control assembly 7, and a magnetic field is generated after the coils 5-7 are electrified to attract the hydraulic telescopic rods 1-1, so that the rolling wheels 1-3 are driven to do left-right reciprocating motion to initially press the asphalt mixture.
Step four: the movable driving component 4 is manually adjusted to enable the biconical steel wheel 4-3 to move along the steel wheel track 5-5 to drive the forming heating component 2 to rotate. And simultaneously, adjusting a control motor 3-3 to enable the supporting and demoulding component 3 to synchronously rotate around the spherical component 5-4 and the forming and heating component 2 by a rotation angle of 90 degrees.
Step five: and repeating the third step, and re-pressing the asphalt mixture until the standard compactness of the mixed mixture is 100 +/-1%, so that the single-layer track plate is formed.
Step six: after the rolling of the rut plate is finished, the hydraulic rod 3-2 is adjusted to move upwards and drive the bottom plate 3-1, so that the rut plate is completely separated from the test mold under the action of the bottom plate 3-1.
(2) Forming and demoulding double-layer track plate
The method comprises the following steps: and heating the components of the rolling wheel 1-3, the bottom plate 3-1, the second cavity 2-5 and the like which are in contact with the asphalt mixture.
Step two: and adjusting the hydraulic rod 3-2 to move upwards so that the bottom plate 3-1 and the second cavity 2-5 form a track plate test mold. And (3) coating a separant on the inner part, taking out the upper cavity 2-1 and the four bolts 2-3, and pouring the uniformly mixed asphalt mixture into a test mold.
Step three: the length of the hydraulic telescopic rod 1-1 is adjusted, and the rolling wheel 1-3 is put down by controlling the supporting bearing shaft 1-2, so that the rolling wheel 1-3 is contacted with the mixture; alternating current is alternately conducted to the left coil 5-7 and the right coil 5-7 through the control assembly 7, and a magnetic field is generated after the coils 5-7 are electrified to attract the hydraulic telescopic rod 1-1, so that the rolling wheel 1-3 is driven to do left-right reciprocating motion to initially press the asphalt mixture.
Step four: the movable driving component 4 is manually adjusted to enable the biconical steel wheel 4-3 to move along the circular track 5-5 to drive the forming heating component 2 to rotate. And simultaneously, adjusting a control motor 3-3 to enable the supporting and demoulding component 3 to synchronously rotate around the spherical component 5-4 and the forming and heating component 2 by a rotation angle of 90 degrees.
Step five: and repeating the third step, and re-pressing the asphalt mixture until the standard compactness of the mixed mixture is 100 +/-1%.
Step six: the heated first cavity 2-1 is mounted on the second cavity 2-5 and the four pins 2-3 are inserted into the four slots 2-4 to control the lateral displacement of the first cavity 2-1.
Step seven: coating an adhesive on the single-layer track plate, installing a first cavity 2-1 and four bolts 2-3 on a second cavity 2-5, coating a separant inside the first cavity 2-1, and pouring the uniformly mixed asphalt mixture into a test mold. And repeating the third step to the fifth step until the double-layer track plate is formed.
Step eight: after the rolling of the rut plate is finished, a built-in control motor switch for supporting the demolding component 3 is opened, the hydraulic rod 3-2 is adjusted to move upwards, and the bottom plate 3-1 is driven, so that the rut plate is completely separated from the test mold under the action of the bottom plate 3-1.
2. Referring to fig. 10, "shear performance test" uses the process and principle:
(1) shear performance test of asphalt mixture
The method comprises the following steps: the single-layer rut plate is placed in a rut plate test mold formed by a bottom plate 3-1 and a lower cavity 2-5, the hydraulic rod 3-2 is adjusted to move upwards, the bottom plate 3-1 is driven, and the rut plate moves upwards by 2.5cm under the action of the bottom plate 3-1.
Step two: after the power is switched on, the driving motor 5-1 drives the bearing 6-2, so that the bearing 6-2 drives the gear 6-3 to move leftwards along the bearing track 5-8, the shearing rod 6-4 moves oppositely to the gear 6-3 along the shearing rod track 5-9, the shearing pushing head 6-1 is driven to apply gradually increased thrust to the asphalt mixture rut plate until the test piece is damaged, and the control assembly 7 records the maximum shearing stress when the test piece is damaged in the shearing process.
(2) Interlaminar shear resistance test of asphalt pavement
The method comprises the following steps: after the double-layer track plate is formed, the first heating resistance wire 2-2 and the second heating resistance wire 2-6 are electrified to generate heat, so that a temperature gradient is generated inside the test piece from top to bottom.
Step two: taking out the four bolts 2-3, driving the bearing 6-2 through the driving motor 5-1, driving the gear 6-3 to move leftwards along the bearing track 5-8 by the bearing 6-2, and driving the shearing pushing head 6-1 to apply horizontal thrust to the first cavity 2-1 by the shearing rod 6-4 and the gear 6-3 doing opposite movement, and meanwhile adjusting the hydraulic telescopic rod 1-1 through the driving motor 5-1 to enable the rolling wheel 1-3 to apply sine-wave-shaped vertical force to the test piece until the test piece is damaged, and recording the maximum shearing stress when the test piece is damaged by the computer in the shearing process.
The present invention will be explained in further detail with reference to examples. The device can be used for molding the track plates with different thicknesses and demolding without damage, and can also be used for testing the shearing resistance between the asphalt mixture and the asphalt pavement layer.
Example 1: single-layer track plate forming and nondestructive demolding
And forming the rutting plates with different thicknesses according to the test specification of road engineering asphalt and asphalt mixture test specification (JTGE 20-2011). Before use, the rolling wheels 1-3 and the test die are preheated, the steps from the first step to the fifth step of the forming and demoulding of the single-layer rut plate are completed according to the using process of the forming of the rut plate, and the rolling parameters are set in the step three: rolling for 2 times in the same direction under the total load of 9kN, so that the forming of the single-layer track plate is finished; and after the test piece is cooled for 12 hours, completing the step six of forming and demolding the single-layer rut plate until the demolding of the single-layer rut plate is completed.
Example 2: double-layer track plate forming and nondestructive demolding
And forming the rutting plates with different thicknesses according to the test specification of road engineering asphalt and asphalt mixture test specification (JTGE 20-2011). Before use, the rolling wheels 1-3 and the test die are preheated, the steps from the first step to the seventh step of forming and demoulding the double-layer rut plate are completed according to the use process of forming the rut plate, and the rolling parameters are set in the step three: rolling for 2 times in the same direction under the total load of 9kN, and finishing the forming of the double-layer track plate; and after the test piece is cooled for 12h, completing the step eight of forming and demolding the double-layer rut plate, so that demolding of the double-layer rut plate is completed.
Example 3: shear performance test of asphalt mixture
According to the test specification of the asphalt pavement construction technology for roads (JTGF40-2004), the shear resistance of the asphalt mixture is tested according to the process of the shear resistance test of the asphalt mixture, and the maximum shear stress of the test piece during the damage is recorded.
Example 4: interlaminar shear resistance test of asphalt pavement
According to the test specification of the asphalt pavement construction technology for highways (JTGF40-2004), the interlaminar shear resistance of the asphalt pavement is tested according to the process of the interlaminar shear resistance test of the asphalt pavement, and the maximum shear stress of the test piece during the damage is recorded.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A rut plate forming device with a shear resistance testing function is characterized by comprising a rolling loading assembly (1), a forming heating assembly (2), a supporting demolding assembly (3), a movable driving assembly (4), a driving supporting assembly (5) and a shearing assembly (6);
one end of the rolling loading assembly (1) is slidably connected with the driving support assembly (5), the other end of the rolling loading assembly is positioned above the forming heating assembly (2), the bottom of the forming heating assembly (2) is connected with the top end of the supporting demolding assembly (3) and the top end of the movable driving assembly (4), the bottom ends of the supporting demolding assembly (3) and the movable driving assembly (4) are rotatably connected with the driving support assembly (5), and the shearing assembly (6) is positioned on one side of the forming heating assembly (2) and is connected with the driving support assembly (5);
the rolling loading assembly (1) is used for rolling the heating assembly (2);
the forming heating assembly (2) is used for forming and heating the rut plate;
the supporting and demoulding assembly (3) is used for supporting the forming heating assembly (2) and demoulding the rut plate formed in the forming heating assembly (2);
the movable driving component (4) is used for driving the forming heating component (2) to rotate;
the driving support assembly (5) is used for driving the rolling loading assembly (1) and the shearing assembly (6);
the shearing assembly (6) is used for shearing the formed track plate in the forming heating assembly (2).
2. The rut plate forming device with the shear performance testing function according to claim 1, further comprising a control assembly (7), wherein the control assembly (7) is connected with both the rolling loading assembly (1) and the driving support assembly (5) and is used for controlling the rolling force of the rolling loading assembly (1) on the rolling forming heating assembly (2), controlling the driving support assembly (5) to start or stop driving the rolling loading assembly (1) and the shearing assembly (6), and recording the shearing force of the shearing assembly (6) when the rut plate in the forming heating assembly (2) is damaged.
3. The rut plate forming device with the shear performance testing function according to claim 1, wherein the driving support assembly (5) comprises a driving motor (5-1) and a bracket (5-2);
the support (5-2) comprises a first cross rod, a second cross rod and a vertical rod, the first cross rod is provided with a U-shaped guide groove (5-3) of a connecting cross rod, the U-shaped guide groove (5-3) of the connecting cross rod is connected with the rolling loading assembly (1), and the first cross rod at two ends of the U-shaped guide groove (5-3) of the connecting cross rod is provided with a coil (5-7); a groove is formed in the second cross rod, a hemispherical support (5-4) and a steel wheel track (5-5) are arranged in the groove, the hemispherical support (5-4) is connected with the supporting and demolding assembly (3), the steel wheel track (5-5) is connected with the movable driving assembly (4), and a baffle (5-6) is connected with the top end of the inner wall of the groove and is positioned above the steel wheel track (5-5); the vertical rod is provided with a bearing track (5-8) and a shearing rod track (5-9), and the bearing track (5-8) and the shearing rod track (5-8) are both connected with the shearing assembly (6); the output shaft of the driving motor (5-1) is connected with the shearing assembly (6).
4. The rut plate forming device with the shear performance test function according to claim 3, wherein the rolling loading assembly (1) comprises a support bearing shaft (1-2), a rolling wheel (1-3) and two hydraulic telescopic rods (1-1);
one ends of the two hydraulic telescopic rods (1-1) are connected through a supporting bearing (1-2); the other end of the connecting cross rod is connected with a connecting cross rod which is in sliding connection with a U-shaped guide groove (5-3) of the connecting cross rod, and the connecting cross rod is made of magnetic materials; the rolling wheel (1-3) is sleeved on the supporting bearing shaft (1-2), and the rolling wheel (1-3) is positioned above the forming heating assembly (2).
5. The rut plate forming device with the shear performance testing function according to claim 3, wherein the forming heating assembly (2) comprises a first cavity (2-1) and a second cavity (2-5);
the top end of the first cavity (2-1) is positioned below the rolling loading assembly (1), the bottom end of the first cavity (2-1) is detachably connected with the top end of the second cavity (2-5), and the bottom end of the second cavity (2-5) is connected with the supporting demolding assembly (3) and the movable driving assembly (4); a first heating resistance wire (2-2) is arranged inside the side wall of the first cavity (2-1), and a second heating resistance wire (2-6) is arranged inside the side wall of the second cavity (2-5).
6. The rut plate forming device with the shear performance testing function according to claim 5, wherein the bottom end of the first cavity (2-1) is connected with the top end of the second cavity (2-5) through a plurality of bolts (2-3), one end of each bolt (2-3) is connected with the first cavity (2-1), and the other end of each bolt is located in a plurality of clamping grooves (2-4) formed in the outer wall of the second cavity (2-5).
7. The apparatus for forming a rut plate with a shear test function according to claim 5, wherein the first cavity (2-1) and the second cavity (2-5) each comprise an inner cavity and an outer cavity, and the two ends of the inner cavity and the outer cavity are respectively connected through a steel plate; the first heating resistance wire (2-2) and the second heating resistance wire (2-6) are respectively wound on the outer walls of the inner cavities of the first cavity (2-1) and the second cavity (2-5), and the winding turns of the first heating resistance wire (2-2) and the second heating resistance wire (2-6) are sequentially reduced from top to bottom; the outer walls of the outer cavities of the first cavity (2-1) and the second cavity (2-5) are respectively provided with a wire hole, and one end of the first heating resistance wire (2-2) and one end of the second heating resistance wire (2-6) penetrate through the wire holes and are used for being connected with a power supply.
8. The rut plate forming device with the shear performance test function according to claim 1, wherein the supporting stripper assembly (3) comprises a bottom plate (3-1), a hydraulic rod (3-2) and a control motor (3-3);
one end of the bottom plate (3-1) is connected with the forming heating assembly (2), the other end of the bottom plate is sequentially connected with the hydraulic rod (3-2) and the control motor (3-3), and the bottom plate of the control motor (3-3) is rotatably connected with the driving support assembly (5).
9. The rut plate forming device with the shear performance test function according to claim 1, wherein the movable driving assembly (4) comprises several sets of support rods (4-1), bearings (4-2) and double-cone steel wheels (4-3); one end of the supporting rod (4-1) is connected with the forming heating assembly (2), the other end of the supporting rod is connected with the bearing (4-2), the double-cone-shaped steel wheel (4-3) is sleeved on the bearing (4-2), and the double-cone-shaped steel wheel (4-3) is rotatably connected with the driving supporting assembly (5).
10. The rut plate forming device with the shear performance testing function according to claim 1, wherein the shear assembly (6) comprises a shear ram (6-1), a bearing (6-2), a gear (6-3) and a shear rod (6-4);
the shearing pushing head (6-1) is connected with one end of a shearing rod (6-4), the other end of the shearing rod (6-4) is in sliding connection with the driving supporting component (5), a plurality of sawteeth are arranged on the surface of the shearing rod, a gear (6-3) is sleeved on one end of a bearing (6-2) and meshed with the sawteeth on the shearing rod (6-4), and the other end of the bearing (6-2) is connected with the driving supporting component (5) and used for transmitting power output by the driving supporting component (5) to the gear (6-3).
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