CN112697626A - Small hob abrasion testing machine, testing method and evaluation method - Google Patents
Small hob abrasion testing machine, testing method and evaluation method Download PDFInfo
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- CN112697626A CN112697626A CN202011531938.8A CN202011531938A CN112697626A CN 112697626 A CN112697626 A CN 112697626A CN 202011531938 A CN202011531938 A CN 202011531938A CN 112697626 A CN112697626 A CN 112697626A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/565—Investigating resistance to wear or abrasion of granular or particulate material
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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
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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
- G01N2203/0053—Cutting or drilling tools
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Abstract
The invention discloses a small hob abrasion testing machine, a testing method and an evaluation method, which solve the problem that the measurement result of a rock breaking test platform in the prior art has hysteresis, have the beneficial effects of effectively simulating the actual working condition and effectively guiding the actual engineering, and have the following specific schemes: the utility model provides a small-size hobbing cutter wearing and tearing test machine, is including the rock sample ware that is used for placing the rock sample, and the top of rock sample ware sets up a plurality of hobbing cutter cutters, and the hobbing cutter can act on rock sample surface in the rock sample ware, and the size of hobbing cutter is less than TBM hobbing cutter actual size, and the hobbing cutter is fixed in the support frame through rotary mechanism, and normal force is applyed to the hobbing cutter.
Description
Technical Field
The invention relates to the field of geotechnical engineering, in particular to a small hob abrasion testing machine, a testing method and an evaluation method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The shield/TBM plays an increasingly important role in tunnel construction as important construction equipment of underground engineering, and has the advantages of high construction efficiency, high mechanization degree, strong operation safety and the like, and is widely applied to tunnel excavation. In the process of tunneling, the TBM drives the hob to cut a rock body through the rotation of the cutter disc, and the rock breaking performance of the hob cutter determines the construction efficiency in the tunneling process. The hob ring needs to be continuously contacted with rocks in the rock breaking process, the rocks are severely abraded due to the strong abrasiveness of the rocks, the service life of the hob is severely limited, the rock breaking efficiency is severely limited, the mechanical properties of different rocks are different, and the abrasiveness of the hob is obviously different. It is therefore necessary to know the effect of rocks of different characteristics on the abrasiveness of roller cutters.
At present, the main technology for testing the abrasion of the hob in China is as follows: 1. the technology for detecting and identifying the abrasion degree of the hob is named as an automatic calibration device of an eddy current sensor for measuring the abrasion loss of the TBM hob, for example, the application number is CN201420622106.0, and discloses an electronic measuring device for simulating and calculating the abrasion of the hob by combining an output signal of the eddy current sensor and an output signal of a displacement sensor; 2. a hob rock breaking experiment platform, application No. 201721266368.8 hob abrasion test experiment platform, provides an experiment platform for abrasion loss of cutting abrasives in a hob; a3-hob rock breaking experiment platform, application number 201110170070.8, is used for a test platform for a rock breaking mechanism modal study of a tunneling cutter, and discloses a test platform for a rock breaking mode of a tunneling cutter.
The inventor finds that the following defects exist in the prior art:
1. the prior art is mostly applied to the measurement of worn hobs, and the measurement result has hysteresis;
2. the rock breaking experiment platform can not keep constant thrust and is not in accordance with the actual situation;
3. there is no experimental platform dedicated to the evaluation of rock erosion.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a small hob abrasion testing machine, and solves the problems that the actual phase difference error of the measurement result of the existing experimental platform is too large, the engineering cannot be guided according to rock parameters and the like.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a small-size hobbing cutter wearing and tearing test machine, is including the rock sample ware that is used for placing the rock sample, and the top of rock sample ware sets up a plurality of hobbing cutter cutters, and the hobbing cutter can act on rock sample surface in the rock sample ware, and the size of hobbing cutter is less than TBM hobbing cutter actual size, and the hobbing cutter is fixed in the support frame through rotary mechanism, and normal force is applyed to the hobbing cutter.
Foretell wear and tear test machine, rock specimen are used for setting up the rock specimen, and the hobbing cutter can act on the rock specimen, and rotary mechanism drives the hobbing cutter and rotates for the rock specimen to provide the effort by elevating system to the hobbing cutter, realize that actual hobbing cutter acts on the simulation of rock specimen with constant thrust, and can realize the simulation of many broken rock processes, be favorable to carrying out the research of the broken rock process wearing and tearing influence of many hobbing cutters.
According to the small hob abrasion testing machine, the bubble making machine is arranged on one side of the supporting frame and provided with the pipeline, the outlet end of the pipeline faces the rock sample arranged on the rock sample injector, and the bubble making machine can spray foam to the surface of the rock sample and is used for verifying the abrasion rate of a hob cutter under the condition of foam injection.
According to the small hob abrasion testing machine, the rotating mechanism is fixed on the supporting frame, a rotating shaft of the rotating mechanism penetrates through the supporting frame to be connected with the hob holder, and the hob cutter is arranged on the hob holder.
According to the small hob abrasion testing machine, the hob frame comprises the connecting shaft connected with the rotating shaft, the bottom end of the connecting shaft is provided with the supporting plate, the supporting plate can be provided with a plurality of installation parts relative to one side of the connecting shaft, installation of a plurality of hob cutters is achieved, the positions of the hob cutters relative to the hob frame are adjustable, and simulation of rock breaking processes of different hob cutter positions and different hob cutter quantities is conducted.
According to the small hob abrasion test machine, a torque sensor is arranged on the outer side of the position of the connecting shaft of the hob and the supporting plate and is used for evaluating the working of a hob cutter;
and force sensors are arranged on the inner sides of the positions of the tool rest connecting shaft and the supporting plate, the torque sensor and the force sensors are respectively connected with a controller, and the controller is respectively and independently connected with the rotating mechanism and the lifting mechanism.
According to the small hob abrasion testing machine, the installation part is the clamping groove, the telescopic shaft is arranged at the clamping groove, and the telescopic shaft penetrates through the center of a hob cutter to achieve installation of the hob cutter.
As above a small-size hobbing cutter wearing and tearing test machine, the support frame includes the chassis, the rock sample ware is fixed in the chassis, and the chassis passes through the support column and supports the roof, but the support column is extending structure, the roof with elevating system connect, but extending mechanism's setting, the elevating system of being convenient for promotes the roof and reciprocates.
According to the small hob abrasion testing machine, the bubble making mechanism comprises a foam box, a stock solution box used for storing stock solution and a water tank used for storing water are arranged in the foam box, a static mixer is arranged on a top plate of the foam box, the static mixer is connected with a pipeline, and an outlet end of the pipeline faces to the surface of a rock sample.
In a second aspect, the invention further provides a method for testing the wear of the small hob, and the method for testing the wear of the small hob by using the machine comprises the following steps:
preparing a standard rock sample, arranging the rock sample in a rock sample device, installing a set number of hob cutters, and obtaining the diameters of the hob cutters;
adjusting the lifting mechanism to enable the edge of the hob cutter to be tangent to the rock sample, applying a set normal force to the hob cutter through the lifting mechanism, and driving the hob cutter to rotate through the rotating mechanism;
after the time is set, the experiment is finished, and the radius of the hob cutter is measured;
the wear rate of the hob cutter under unit work is obtained through the radius of the hob cutter before and after the experiment, the width of the hob cutter, the wear time of the hob cutter and the normal force of the hob cutter for cutting rocks.
In a third aspect, the invention further provides a method for testing and evaluating the wear of the small hob, which comprises the following steps:
sampling a plurality of different types of rocks;
selecting a plurality of same hob cutters and grouping the hob cutters;
aiming at various rock samples, obtaining the wear rate of the corresponding hob cutter under unit work according to the small hob cutter wear testing method;
and comparing the wear rates of the hob cutter unit under different rock samples under the action, and evaluating the wear resistance of various rock samples.
The beneficial effects of the invention are as follows:
1) according to the invention, vertical pressure can be applied to the hobbing cutter through the lifting mechanism, the rotation of the hobbing cutter can be driven through the rotating motor, the hobbing cutter can cut rock samples under constant pressure in the experiment process, and the tunneling condition under a TBM constant thrust mode is simulated; the hob cutter can cut rock at a constant angular speed, and the tunneling condition of the TBM in a constant rotating speed mode is simulated. Through the parameter setting to elevating system and rotating electrical machines, can simulate the wear rate of different rock specimens to the hobbing cutter under different operating mode conditions.
2) The measurement hob cutter of the experimental device is reduced according to an equal scale according to the actual engineering hob cutter, the operation is simple, and the workload is saved compared with the measurement by adopting the actual hob cutter; through elevating system and rotary mechanism, can effectual simulation actual hobbing cutter's behavior.
3) The installation position of the hob cutter in the hob cutter frame can be adjusted, and the abrasion rate of the rock sample on the hob cutter under the condition of different cutter spacing can be tested by adjusting different installation positions.
4) According to the invention, through the arrangement of the foam-making mechanism, foam can be sprayed to the rock sample, and the wear rate of the hob cutter under the condition of foam injection is verified.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a miniature hob wear test machine according to one or more embodiments of the present invention.
FIG. 2 is an enlarged view of the placement of the hob cutters and the rock sample of a compact hob wear tester according to one or more embodiments of the present invention.
FIG. 3 is a schematic diagram of a force sensor according to one or more embodiments of the invention.
FIG. 4 is a schematic diagram of hob cutter spacing according to one or more embodiments of the present invention.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.
Wherein: 1.1. a base; 1.2. a controller; 1.3. a rotating electric machine; 1.4. a connecting shaft 1.5 is used for supporting the plate; 2.1. a rock sample barrel; 2.2. sampling rock; 2.3. hobbing cutters; 3. a chassis; 4.1. a foam box; 4.2. a static mixer; 5. a force sensor.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced in the background art, the problem that the measurement result of a rock breaking test platform has hysteresis exists in the prior art, and in order to solve the technical problem, the invention provides a small hob abrasion test machine.
In a typical embodiment of the present invention, referring to fig. 1, a small hob abrasion tester includes a rock sample holder for holding a rock sample, a hob cutter is disposed above the rock sample holder, the hob cutter is fixed to a support frame, and the hob cutter is rotatable relative to the support frame; and a foam box is arranged on the side part of the support frame and used for conveying foam to the surface of the rock sample through a pipeline.
Furthermore, the hob cutter is provided with one or more hob cutters, the hob cutter is fixed on the cutter frame, the cutter frame is connected with the rotating mechanism, the cutter frame and the hob cutter are driven to rotate through the rotating mechanism, and the position of the hob cutter can be adjusted. A torque sensor is arranged at the middle shaft of the cutter frame, a force sensor 6 is arranged at the middle shaft of the hob cutter, the force sensor is used for measuring the hob cutter and the normal force, the vertical direction normal phase force is measured to ensure that the hob exerts constant vertical force, the torque is measured to be used for measuring the acting force of the abrasion of the hob, and the torque is used for calculating the abrasion rate of the hob cutter under the working of cutting rocks and the unit working in the later period.
In other examples, the number of the hob cutters 2.3 can be 3 or 4, and the installation phase angle of the hob cutters is 180 degrees, 120 degrees and 90 degrees.
And, the tool rest is including being used for with the axle 1.4 that links that the axis of rotation is connected, links the axle bottom and sets up backup pad 1.5, and the backup pad can set up a plurality of installation departments for one side of linking the axle, and the installation department is the draw-in groove, and draw-in groove department sets up the telescopic shaft, and the telescopic shaft is used for the hobbing cutter to pass the setting, can realize the installation of hobbing cutter through the installation department, and the hobbing cutter is convertible for the position of backup pad.
Specifically, rotary mechanism includes rotating electrical machines or other power supplies, and rotating electrical machines 1.3 is fixed in the support frame roof, and the axis of rotation of rotating electrical machines passes the support frame and is connected with the tool rest, and torque sensor locates between even axle and the backup pad, measures the moment of torsion between even axle and the backup pad, for the moment of torsion size of the different rocks of research hobbing cutter under the same rotational speed condition, provides the basis for judging the frictional force of rock.
The system bubble mechanism includes foam tank 4.1, is provided with the stoste case that is used for saving the stoste in the foam tank and is used for the water tank of storage water, and foam tank roof sets up static mixer, and the foam mixes the foaming through static mixer 4.2 after through foam stoste and water mixture, static mixer connecting tube way, the exit end of pipeline sets up towards the rock specimen surface.
Furthermore, the support frame is provided with a set height and an underframe 3, the rock sample device is fixed on the underframe of the support frame, and can be fixed by welding, and the underframe is used as a reaction frame; the chassis passes through the support column and supports the roof, but the support column is extending structure, and the roof is connected with elevating system, applys pressure to the roof through elevating system, and because of rotating electrical machines is fixed with the roof, normal action force is applyed to the hobbing cutter to the removal through the roof.
It should be noted that the lifting mechanism is a hydraulic driving mechanism, the hydraulic driving mechanism is connected with the controller, the hydraulic driving mechanism is arranged above the top plate of the support frame, and the hydraulic driving mechanism is not shown in fig. 1; the telescopic structure is a multi-joint pipeline, and under the action of the hydraulic driving mechanism, the top plate can be pushed to apply acting force due to the arrangement of the telescopic structure, and the acting force range is 0-2000N.
In addition, the lifting mechanism and the rotating mechanism are both connected with the controller, and the actions of the lifting mechanism and the rotating mechanism are controlled by the controller.
In this example, commercial steels with Rockwell hardness of HRC50 + -1 were selected for the hob cutter, which was about half or less of a normal 17 inch hob cutter.
The rock sample ware is preferably rock sample bucket 2.1, is used for setting up rock sample 2.2 in the rock sample bucket, and the rock sample size is
The inner diameter of the rock sample barrel is 10-14mm, more preferably 12mm, and the inner wall of the rock sample barrel is provided with a limiting bolt.
A small hob abrasion testing method comprises the following steps:
1) preparing a sample: 3-5 standard samples are taken out of the tested rock sample, the standard rock sample is fixed in a rock sample barrel, 2 standard hob cutters are arranged on two sides of a cutter frame, the diameter of each hob cutter is D, and the hob cutters are numbered: measuring 1 and 2 … …, measuring n (each measuring corresponds to two hob cutters), and corresponding the numbers of the hob cutters of the measuring to the numbers of the rock sample;
2) and (3) experimental measurement: firstly, a cutter is rotated under the condition of not applying a rock sample to measure the rotating torque T of the cutter under the condition of idling1Adjusting a lifting mechanism to enable the edge of the hob cutter to be tangent to a rock sample, setting the rotation rate of a rotation per minute of the hob frame, applying a set thrust to c newtons by a rotating shaft and setting the rotating time to t minutes, and simultaneously monitoring and recording the three-way force borne by the hob cutter in real time in the experiment process, wherein the normal force F isNTorque T2. After the measurement is finished, measuring the size of the measuring piece by using a vernier caliper;
3) and (4) analyzing results: radius of the part before the start of the experiment is r0After the experiment is finished, the radius of the measured part is r1The width of the hob cutter measuring piece is b, the distance between the cutter shafts of the two hobs is c (refer to fig. 4), and the abrasion loss of the hob cutter is V ═ π br0 2-πbr1 2The average wear rate of the single hob cutter is as follows
t is the rotation time of the hob cutter, Vn is the average wear rate of the nth hob cutter, and the overall average wear rate is
n is the number of the hob cutters, and the friction force applied to the hob cutters in the working process is
T2For the rotational torque of the hob cutter, T1For moment of torsion when hobbing cutter idle running, these two moments of torsion all obtain when the test through torque sensor, and the distance that hobbing cutter cut the rock is S pi Dat, and a is the cutter frame rate of rotation, and D is hobbing cutter diameter, the frictional force that the hobbing cutter receivedDoing work for hobbing cutter to cut rock as W ═ FfS, wear rate of hob cutter under unit work
Wn is the nth hob cutter which does work for cutting rocks.
The invention relates to a small hob abrasion test machine, which aims to measure the abrasiveness of rocks with different lithologies, and reduces the hob abrasion amount of a TBM/shield tunneling machine when a cutter rock tunnels, wherein the most important reason of hob abrasion is abrasive abrasion, hard particles contained in the rock invade a metal surface and cause hob abrasion in the process of hob lateral movement sliding, the consumed energy on one hand is considered as abrasion work, the nth time when a hob cutter cuts the rock represents the sum of rock breaking energy and hob abrasion amount energy, and the difference of particle components forming the rock is very large, so that the obtained abrasion rate of the hob cutter under unit work is important, the abrasiveness of the rock is evaluated according to the parameters, and the hob abrasion energy ratio in the rock breaking process of different rocks is represented.
4) Opening a foaming mechanism, spraying foam to the surface of the rock sample, repeating the steps 1) to 3) to obtain the abrasion condition of the hob cutter, and comparing the condition of adding the foaming agent with the condition of not adding the foaming agent.
Assuming that the abrasiveness of 3 different types of rock to the hob cutter is to be evaluated, the specific steps are as follows:
sampling 3 different types of rocks, wherein each rock is provided with 3 standard rock samples and is numbered, and the standard rock samples are respectively marked as A1; a2; a3; b1; b2; b3; c1; c2; C3.
grouping 18 hobbing cutters, wherein every two hobbing cutters are grouped and respectively correspond to the rock sample, and numbering a11 and a12 for the hobbing cutters; a21, a22 … … c21 and c 22.
And step three, fixing the rock sample A1 in a rock sample barrel, and mounting a11 and a12 on a tool rest.
Step four: setting the abrasion test time as t, applying the set thrust as c newtons by the lifting mechanism, setting the rotation angular speed of the tool rest as d, performing an abrasion test experiment, and readingTaking the friction force Ff in the experimental process, calculating the average value of two friction forces by using the friction force, and calculating the average wear rate of a single hob cutter
The overall average wear rate is
Wear rate of hob under unit work
Step five: repeating the third step and the fourth step, replacing the abrasion material and the cutter of the test hob for each test, and sequentially obtaining the test results of the three numbered rock samples within the test time t and the abrasion rate mu with the rotation angular velocity d of the cutter frameA1；μA2；μA3；μB1；μB2；μB3；μC1μC2；μC3Obtaining the average wear rate of each rock sample
Wear rate of hob cutter unit acting
Step six: comparison
The wear resistance of 3 rock samples can be evaluated according to the size of the rock sample.
Assuming that the rock is evaluated and evaluated for the abrasion resistance to a hob cutter before and after adding a foaming agent, the specific steps are as follows:
the method comprises the following steps: sampling rocks, taking 4 standard rock samples, numbering the rock samples, and respectively marking the rock samples as A1; a2; b1; B2.
step two: grouping 8 hobbing cutters, grouping every two hobbing cutters, respectively corresponding to the rock sample, and numbering a11 and a12 for the hobbing cutters; a21, a 22; b11, b 12; b21, b 22.
Step three: the rock sample A1 is fixed in the rock sample barrel, and a11 and a12 are mounted on the tool rest.
Step four: setting the abrasion test time as t, the screw applying the verification thrust as c newtons, the tool rest rotation angular velocity as d, performing an abrasion test experiment, and reading the friction force F in the experiment processfAnd calculating the average value of two friction forces by using the friction force, so that the average wear rate of a single hob cutter can be calculated to be
The overall average wear rate is
Wear rate of hob under unit work
Step five: and repeating the third step and the fourth step, replacing the worn material A2 and the test hob cutters a21 and a22 during testing, and measuring the wear result of the hob cutters in time t.
Step six: and repeating the third step and the fourth step, opening the additional foam system in the testing process of the fourth step, and testing the abrasion result of the hob cutter within the time t.
Step seven: wear rate mu at a tool holder rotation angular velocity dA1；μA2；μB1；μB2Obtaining the average wear rate of each rock sample
Wear rate of hob cutter unit acting
Step eight: comparison
The wear resistance of 3 rock samples can be evaluated。
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a small-size hobbing cutter wearing and tearing test machine, its characterized in that, including the rock sample ware that is used for placing the rock sample, the top of rock sample ware sets up a plurality of hobbing cutter cutters, and the hobbing cutter can act on rock sample surface in the rock sample ware, and the size of hobbing cutter is less than TBM hobbing cutter actual size, and the hobbing cutter passes through rotary mechanism to be fixed in the support frame, and normal force is applyed to the hobbing cutter at the.
2. The small hob abrasion testing machine according to claim 1, wherein a bubble making machine is arranged on one side of the supporting frame, the bubble making machine is provided with a pipeline, and an outlet end of the pipeline is arranged towards a rock sample arranged on the rock sample device.
3. The miniature roller cutter wear testing machine of claim 1, wherein said rotating mechanism is fixed to a support frame, and a rotating shaft of said rotating mechanism passes through said support frame to be connected to a cutter holder, said cutter holder being provided with said cutter of said roller cutter.
4. The small hob cutter wear testing machine according to claim 3, wherein the hob head includes a connecting shaft connected with the rotating shaft, a supporting plate is provided at a bottom end of the connecting shaft, a plurality of mounting portions are provided at a side of the supporting plate opposite to the connecting shaft, so that a plurality of hob cutters are mounted, and a position of the hob cutters relative to the hob head is adjustable.
5. The small hob cutter wear testing machine according to claim 3, characterized in that a torque sensor is arranged outside the position of the connecting shaft of the hob and the supporting plate;
a force sensor is arranged on the inner side of the position of the cutter frame connecting shaft and the supporting plate;
the torque sensor and the force sensor are respectively connected with the controller, and the controller is respectively and independently connected with the rotating mechanism and the lifting mechanism.
6. The small hob abrasion testing machine according to claim 4, wherein the mounting portion is a slot, and a telescopic shaft is disposed at the slot.
7. The small hob abrasion testing machine according to claim 1, wherein the supporting frame comprises a bottom frame, the rock sampler is fixed on the bottom frame, the bottom frame supports the top plate through supporting columns, the supporting columns are of a telescopic structure, and the top plate is connected with the lifting mechanism.
8. The small hob abrasion testing machine according to claim 2, wherein the foam making mechanism includes a foam tank, a stock solution tank for storing stock solution and a water tank for storing water are provided in the foam tank, a static mixer is provided on a top plate of the foam tank, the static mixer is connected with a pipeline, and an outlet end of the pipeline is provided toward the surface of the rock sample.
9. A method for testing the abrasion of a small hob, which is characterized in that the small hob abrasion testing machine according to any one of claims 1 to 8 is adopted, comprising the following steps:
preparing a standard rock sample, arranging the rock sample in a rock sample device, installing a set number of hob cutters, and obtaining the diameters of the hob cutters;
adjusting the lifting mechanism to enable the edge of the hob cutter to be tangent to the rock sample, applying a set normal force to the hob cutter through the lifting mechanism, and driving the hob cutter to rotate through the rotating mechanism;
after the time is set, the experiment is finished, and the radius of the hob cutter is measured;
the wear rate of the hob cutter under unit work is obtained through the radius of the hob cutter before and after the experiment, the width of the hob cutter, the wear time of the hob cutter and the normal force of the hob cutter for cutting rocks.
10. A method for testing and evaluating the abrasion of a small hob is characterized by comprising the following steps:
sampling a plurality of different types of rocks;
selecting a plurality of same hob cutters and grouping the hob cutters;
aiming at various rock samples, obtaining the wear rate of the corresponding hob cutter under unit work according to the abrasion test method of the small hob cutter according to claim 9;
and comparing the wear rates of the hob cutter unit under different rock samples under the action, and evaluating the wear resistance of various rock samples.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278961A (en) * | 2011-03-21 | 2011-12-14 | 天津大学 | Heading machine disc cutter wear extent pre-estimate calculating method |
| CN102841030A (en) * | 2011-06-22 | 2012-12-26 | 中铁隧道集团有限公司 | Test platform used in researching tunnel boring machine tool rock breaking mechanism |
| US20140250973A1 (en) * | 2013-03-08 | 2014-09-11 | Diamond Innovations, Inc. | Laboratory assessment of pdc cutter design under mixed-mode conditions |
| CN104062197A (en) * | 2014-07-14 | 2014-09-24 | 中南大学 | Testing device for abrasion property of hard rock hobbing cutter |
| CN107941644A (en) * | 2017-12-28 | 2018-04-20 | 中铁隧道局集团有限公司 | Measure the experimental provision and supporting hobboing cutter slip and sliding distance measuring method of Three Degree Of Freedom hobboing cutter broken rock and abrasion |
| CN207636430U (en) * | 2017-09-29 | 2018-07-20 | 中铁隧道局集团有限公司 | Hob abrasion test experiments platform |
| CN108710722A (en) * | 2018-04-04 | 2018-10-26 | 郑州大学 | A kind of prediction technique of TBM hob abrasion |
| CN110715869A (en) * | 2019-11-13 | 2020-01-21 | 吉林大学 | Hard rock tunneling hob rotary cutting test bed |
| CN111624088A (en) * | 2020-04-20 | 2020-09-04 | 山东大学 | TBM hob and high-pressure water jet coupling rock breaking simulation test system and method |
-
2020
- 2020-12-22 CN CN202011531938.8A patent/CN112697626A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278961A (en) * | 2011-03-21 | 2011-12-14 | 天津大学 | Heading machine disc cutter wear extent pre-estimate calculating method |
| CN102841030A (en) * | 2011-06-22 | 2012-12-26 | 中铁隧道集团有限公司 | Test platform used in researching tunnel boring machine tool rock breaking mechanism |
| US20140250973A1 (en) * | 2013-03-08 | 2014-09-11 | Diamond Innovations, Inc. | Laboratory assessment of pdc cutter design under mixed-mode conditions |
| CN104062197A (en) * | 2014-07-14 | 2014-09-24 | 中南大学 | Testing device for abrasion property of hard rock hobbing cutter |
| CN207636430U (en) * | 2017-09-29 | 2018-07-20 | 中铁隧道局集团有限公司 | Hob abrasion test experiments platform |
| CN107941644A (en) * | 2017-12-28 | 2018-04-20 | 中铁隧道局集团有限公司 | Measure the experimental provision and supporting hobboing cutter slip and sliding distance measuring method of Three Degree Of Freedom hobboing cutter broken rock and abrasion |
| CN108710722A (en) * | 2018-04-04 | 2018-10-26 | 郑州大学 | A kind of prediction technique of TBM hob abrasion |
| CN110715869A (en) * | 2019-11-13 | 2020-01-21 | 吉林大学 | Hard rock tunneling hob rotary cutting test bed |
| CN111624088A (en) * | 2020-04-20 | 2020-09-04 | 山东大学 | TBM hob and high-pressure water jet coupling rock breaking simulation test system and method |
Non-Patent Citations (5)
| Title |
|---|
| 刘海龙 等: "《TBM滚刀刀圈与岩石的滑动磨损实验研究》", 《实验力学》 * |
| 刘颖超: "《斜井 TBM 滚刀破岩机理及刀具磨损研究》", 《中国博士学位论文全文数据库（工程科技I辑）》 * |
| 夏毅敏 等: "《不同岩石特性下TBM滚刀刀圈磨损性能》", 《哈尔滨工程大学学报》 * |
| 温森 等: "《复合岩层中滚刀旋转切割破岩效率试验研究》", 《岩土力学》 * |
| 郭伟 等: "《基于能量原理的 TBM 刀盘掘进参数与刀间距匹配特性分析》", 《天津大学学报（自然科学与工程技术版）》 * |
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