CN112730134A - Rock breaking cutter material-compact core substance pair-abrasion test method - Google Patents
Rock breaking cutter material-compact core substance pair-abrasion test method Download PDFInfo
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Abstract
A rock breaking cutter material-compact core material pair grinding test method comprises the following steps: s1: acquiring basic information related to the frictional wear performance of the cutter ring; s2: obtaining the composition and physical and mechanical parameters of a rock powder sample; s3: acquiring parameters related to the frictional wear performance of a cutter ring when the hob cuts the rock under the depth h; s4: preparing a probe; s5: loading the rock powder sample to ensure that the stress level of the rock powder sample reaches the stress level P of the compact nuclear area at the bottom of the cutter ring bladefield(ii) a S6: the probe vertically penetrates into the rock powder sample under a given positive pressure N; s7: driving the probe to wipe the rock powder sample for a certain distance L; s8: the test phenomena and results were recorded and analyzed. The invention can accurately measure the change condition of the probe and the compact nuclear powder to the quality loss after grinding, and has higher similarity with the actual working condition of the hob under study.
Description
Technical Field
The invention belongs to the crossing field of mechanical engineering, geotechnical engineering and tunnel engineering, and relates to a rock breaking cutter material-compact nuclear substance pair abrasion test method, in particular to a rock breaking cutter material-compact nuclear substance pair abrasion test method considering the abrasion and sliding rubbing effect of compact nuclear substances on a blade bottom.
Background
The generalized rock breaking cutter including a hob, a cutter, a drill bit, a pickaxe tooth and the like is widely applied to mechanical engineering, geotechnical engineering and tunnel engineering, wherein: disc cutters (hereinafter referred to as hob cutters) are used for cutting and crushing hard rock, and are main rock crushing cutters of a full-face hard rock Tunnel Boring Machine (TBM) and a shield; the cutter is used for cutting soft rock and soil and is a main rock (soil) breaking cutter of the shield. Due to the fact that stratum geological conditions are severe and changeable, the rock breaking mechanism of the rock breaking cutter is quite complex, but extrusion rock breaking is one of the most common and wide rock breaking mechanisms of the rock breaking cutter.
Taking a TBM hob as an example, specifically, the hob directly contacts and rolls and cuts the rock by means of a cutter ring, and applies huge extrusion stress to highly pulverize and densify the rock, so that a compact core similar to the drilling, impact rock drilling, cutting by a cutting pick and other processes is formed at the bottom of a cutting edge; in the process of breaking rock by continuously rotating and rolling the hob, the dense nuclear substances at the blade bottom are periodically derived, developed and disintegrated.
As is common in the foregoing compression rock breaking mechanism, the phenomenon of compact nucleus is widely existed in the rock breaking process of the rock breaking tool, and the dynamic derivation mechanism thereof undoubtedly directly affects the rock breaking mechanism of the rock breaking tool and changes the boundary condition of tool-rock interaction, that is, in the initial state, the hob and the complete fresh rock mass start to contact, but in the relatively stable continuous rotary rolling rock breaking process, the hob and the blade bottom contact is no longer the complete fresh rock mass but the compact nucleus substance. According to the inference of a compact nucleus theory proposed by the soviet union expert a.h. allopong in coal mining engineering, the compact nucleus phenomenon at least has a great influence on the frictional wear performance of the hob ring, so that an extremely adverse contact force characteristic is generated on a hob rock contact interface, and the wear service life of the hob is seriously shortened.
However, at present, a feasible physical test device is not available for simulating and reproducing the continuous grinding and sliding action of the compact nuclear substance in the compact nuclear area on the rock breaking cutter blade bottom, and a reasonable cutter-rock grinding test method is also unavailable for quantitatively and intensively researching the continuous grinding and sliding action process of the compact nuclear substance on the rock breaking cutter blade bottom, so that the compact nuclear phenomenon is not considered in the existing research on the friction and wear mechanism of the hob ring material.
Therefore, the rock breaking cutter material-compact nuclear substance pair abrasion test method which is economical, convenient and meets engineering requirements is provided, and particularly relates to the rock breaking cutter material-compact nuclear substance pair abrasion test method considering the abrasion and sliding effect of the compact nuclear substance on the blade bottom, which is a problem to be solved urgently in the industry.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rock breaking cutter material-compact core material pair grinding test method, which comprises the following steps:
s1: obtaining basic information related to the frictional wear performance of the hob ring (hereinafter referred to as the hob ring) to be researched, including but not limited to the hob installation size parameter (hob installation radius R) of the hobiDistance between hob cutters Sc) And the contour dimension parameter of the cutter ring (the outer diameter R of the cutter ring)cThe parameters of the overall dimension of the cutter ring and the width B of the edge of the cutter ring are equalcKnife edge angle thetacTransition arc radius r of cutting edgecThe size parameters of the blade-shaped section of the cutter ring, the cutting parameters (the rotating speed n and the cutting depth H of a cutter head), the material composition and the physical and mechanical performance parameters (density, Poisson ratio, elastic modulus, impact toughness, yield strength, hardness H and the like) of the cutter ring, and the physical and mechanical performance parameters (density, Poisson ratio, elastic modulus, tensile strength sigma and the like) of the rocktAnd compressive strength sigmacShear strength);
s2: collecting rock powder samples in a compact nuclear area of a hob actual construction site or a cutting test site to be researched, and obtaining composition components and physical and mechanical parameters (including particle size, water content, density and the like) of the rock powder samples;
s3: acquiring dynamic characteristic parameters related to the frictional wear performance of the cutter ring during rock breaking by rolling under the cutting depth h of the hob based on the basic information acquired in S1 by at least one means including but not limited to theory, simulation and test, wherein the dynamic characteristic parameters include but not limited to the stress level P of the compact nuclear area of the edge bottom of the cutter ringfieldThe circumferential linear velocity v of the cutter ring;
s4: preparing a probe with the same material composition and physical and mechanical property parameters as those of the cutter ring obtained in S1;
s5: will S2The rock powder sample collected in the process is filled into the accommodating cavity between the loading head and the cavity, and then the loading head is utilized to apply extrusion load to the rock powder sample, so that the stress level of the rock powder sample reaches the stress level P of the compact nuclear area at the edge bottom of the cutter ringfield；
S6: the probe vertically penetrates into the rock powder sample under a given positive pressure N, wherein N satisfies the following formula (3), so that the contact stress between the probe and the rock powder sample reaches the stress level P of the compact nuclear region at the edge bottom of the cutter ringfield；
N＝A·Pfield (3)
In the formula, A is the contact area of the probe and the rock powder sample;
preferably, the pattern of the probe prepared in S4 includes, but is not limited to, one of the following patterns: the tail end of the cylinder is provided with a frustum;
s7: the probe is driven to slide and rub the rock dust sample horizontally and periodically to a certain distance (marked as a sliding distance L), and the sliding speed v is1The same with the cutter circle circumferential line speed v, L and v satisfy the following formula (3):
in the formula, t is the wiping time;
preferably, in S4, the probe is only required to have the same element composition as the cutter ring, and the average mass fraction of each component element composition of the probe is within the statistical range of the mass fraction of the corresponding element of the cutter ring; the average hardness of the probe is required to be within the statistical range of the hardness of the edge part of the cutter ring;
preferably, a rock sample is collected from a cutter ring cutting site, and the rock sample is ground into an approximate rock powder sample with the same physical and mechanical parameters by using a ball mill;
preferably, the approximate rock dust sample is only required to have the same average particle size as the rock dust sample collected in S2;
s8: recording and analyzing test phenomena and results;
preferably, S8 includes, but is not limited to, recording and analyzing the following items:
1) the probe friction force f in S7 was measured, and the friction coefficient μ was calculated from the following formula:
f＝μN (5)
2) the mass loss Δ m of the probe before and after the measurement of S70And calculating the mass loss rate v of the probe at the unit sliding distance according to the following formulam：
3) Measuring the micro-topography of the tail ends of the front probe and the rear probe of S7, and analyzing the wear failure mechanism of the rock breaking cutter material-compact nuclear substance;
4) obtaining the wiping speed v by fitting1Law of influence on coefficient of friction μ:
wherein a, b, c and d are constants determined by the material composition of the probe and the contact load of the probe and the rock powder sample;
preferably, S8 further includes analyzing the following items:
researching composition of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of tight nuclear zone at edge bottom of cutter ringfieldCircumferential linear velocity v of cutter ring and positive pressure N to quality loss rate v of probemAnd the law of influence of the friction coefficient mu;
more preferably, S8 further includes analyzing the following items:
based on the Archard theoretical model, the wear coefficient K can be derived from the following formula (8);
wherein H is the hardness of the probe.
Compared with the prior art, the invention has the advantages that:
1) the tool rock opposite grinding test method provided by the invention can accurately measure the quality change of the probe and the compact nuclear powder after opposite grinding.
2) The opposite grinding test method for the cutter rock provided by the invention has higher similarity with the actual working condition of the hob studied.
Drawings
The device of the invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic three-dimensional structure diagram of a rock breaking cutter material friction wear test device.
Fig. 2 is a schematic diagram of a three-dimensional structure of a rock breaking cutter material friction wear test device at another view angle.
Fig. 3 is a perspective sectional view taken on the basis of fig. 1.
Fig. 4 is a schematic three-dimensional structure of the base in fig. 1.
Fig. 5 is a schematic three-dimensional structure of the upper die of fig. 1.
FIG. 6 is a flow chart of the rock breaking cutter material-compact core material pair abrasion test method of the present invention.
FIG. 7 is a diagram of a finite element model of probe intrusion into a dense core powder.
FIG. 8 is a comparison of the penetration of different tips into the dense core powder.
Description of the main elements
| 1 | |
| 11 | Loading |
| 2 | Upper pressing die |
| 21 | |
| 22 | |
| 3 | Probe installation sliding table |
| 32 | Probe needle |
Detailed Description
The invention provides a rock breaking cutter material-compact core material pair abrasion test method, which comprises the following steps as shown in figure 5:
s1: obtaining basic information related to the frictional wear performance of the hob ring (hereinafter referred to as the hob ring) to be researched, including but not limited to the hob installation size parameter (hob installation radius R) of the hobiDistance between hob cutters Sc) And the contour dimension parameter of the cutter ring (the outer diameter R of the cutter ring)cThe parameters of the overall dimension of the cutter ring and the width B of the edge of the cutter ring are equalcKnife edge angle thetacTransition arc radius r of cutting edgecThe size parameters of the blade-shaped section of the cutter ring, the cutting parameters (the rotating speed n and the cutting depth h of a cutter head), the material composition and the physical and mechanical performance parameters (density, Poisson ratio, elastic modulus, impact toughness, yield strength, hardness and the like) of the cutter ring, and the physical and mechanical performance parameters (density, Poisson ratio, elastic modulus, tensile strength sigma and the like) of the rocktAnd compressive strength sigmacShear strength);
s2: collecting rock powder samples in a compact nuclear area of a hob actual construction site or a cutting test site to be researched, and obtaining composition components and physical and mechanical parameters (including particle size, water content, density and the like) of the rock powder samples; for example, the particle size distribution of the rock dust sample in the compact nuclear area is observed by a microscope, and the average particle size is calculated;
s3: acquiring dynamic characteristic parameters related to the frictional wear performance of the cutter ring during rock breaking by rolling under the cutting depth h of the hob based on the basic information acquired in S1 by at least one means including but not limited to theory, simulation and test, wherein the dynamic characteristic parameters include but not limited to the stress level P of the compact nuclear area of the edge bottom of the cutter ringfieldThe circumferential linear velocity v of the cutter ring; more specifically, in this embodiment, the contact stress level P of the edge bottom of the cutter ring when the hob rolls to break the rock can be obtained by simulation analysis means, for example, by using transient nonlinear dynamics software such as ANSYS/LS-DYNA, Abaqus and the likefieldCutting ring vertical cutting force FvThe circumferential linear velocity v of the cutter ring can also be obtained by adopting theoretical analysis means, for example, P is calculated and obtained by referring to the pressure of the compact nuclear area after the rock cutting of the blunt cutter shown in the following formula (1)field(ii) a In the model, a compact nuclear area is assumed to be in a hydrostatic pressure state, namely, the pressure intensity in the compact nuclear area is equal;
s4: preparing a probe with the same material composition and physical and mechanical property parameters as those of the cutter ring obtained in S1; in this example, the probe is made of H13 steel which is a common material for cutter rings;
s5: filling the rock powder sample collected in the S2 into the containing cavity between the loading head and the cavity, and applying extrusion load to the rock powder sample by using the loading head so that the stress level of the rock powder sample reaches the stress level P of the compact nuclear area at the bottom of the edge of the cutter ringfieldFor simulating the confining pressure state of rock powder in the compact nuclear zone, i.e. simulating the compact nuclear material (i.e. having the stress level P of the blade edge bottom compact nuclear zone)fieldRock dust of (a); in this example, PfieldApplied as follows (2):
in the formula, FtFor pretension of a single bolt, A1Is the area of the loading head;
s6: the probe vertically penetrates into the rock powder sample under a given positive pressure N, wherein N satisfies the following formula (3), so that the contact stress between the probe and the rock powder sample reaches the stress level P of the compact nuclear region at the edge bottom of the cutter ringfield(ii) a In this way, the probe can be kept static relative to the surface of the rock dust sample in the vertical direction;
N＝A·Pfield (3)
in this example, N ═ m + m0) g; a is the contact area of the probe and the rock powder sample; m and m0Respectively the weight mass and the probe mass;
more specifically, in this example, the step S6 is specifically performed by using a rock breaking cutter material-compact nucleus material pair abrasion test device. As shown in fig. 1 to 4, the rock breaking cutter material-compact core material pair abrasion test device comprises a base 1, an upper pressing die 2, a probe mounting sliding table 3, a probe 32 and a power transmission system, wherein:
a loading head 11 is vertically arranged at the central position of the upper part of the base 1;
the upper pressing die 2 is positioned right above the base 1; a cavity 21 is inwards arranged at the center of the lower part of the upper pressing die 2; as shown in fig. 5, a slit 22 communicated with the cavity 21 is formed at the center of the upper part of the upper die 2; under the action of given tensile force, the upper pressing die 2 vertically and downwards presses the base 1 along the length direction of the loading head 11, and the probe mounting sliding table 3 reciprocates and freely moves right above the upper pressing die 2 along the length direction of the slit 22; the top of the probe mounting sliding table 3 is provided with a probe through hole; the lower end of the probe 32 sequentially and movably penetrates through the probe through hole and the slit 22, then contacts with rock powder, and applies a given positive pressure N to the rock powder below the probe;
the probe mounting sliding table 3 is driven by the power transmission system to reciprocate relative to the upper pressing die 2, so that rock powder under a given confining pressure stress state is simulated to repeatedly grind and wipe the hob edge bottom material according to a given positive pressure N;
preferably, the pattern of the probe prepared in S4 includes, but is not limited to, one of the following patterns: as shown in fig. 7, the device is a cylinder, a cylinder with a tip at the tail end, a cylinder with a frustum at the tail end, and a cylinder with a transition ball head at the tail end;
s7: the probe is driven to slide and rub the rock dust sample horizontally and periodically to a certain distance (marked as a sliding distance L), and the sliding speed v is1The same with the cutter circle circumferential line speed v, L and v satisfy the following formula (4):
in the formula, t is the wiping time;
preferably, considering that the material composition and the physical and mechanical properties of the cutter ring fluctuate and the prepared probes also have differences, in order to simplify the preparation process and the test calibration time of the probes, in S4, the probes are only required to have the same element composition as the cutter ring, and the average mass fraction of each component element composition of the probes is within the statistical range of the mass fraction of the corresponding element of the cutter ring; the average hardness of the probe is required to be within the statistical range of the hardness of the edge part of the cutter ring; therefore, the rock powder sample adopted in the grinding test of the rock breaking cutter material-compact nuclear substance pair is approximately ensured to have the same composition and physical and mechanical properties with the rock powder in the blade bottom compact nuclear area when the rock is broken by rolling with the hob under the actual working condition;
preferably, considering that the quantity of the rock powder samples collected in S2 is small and is not enough to meet the requirement of large-batch tests, rock samples are collected from a cutter ring cutting site, and the rock samples are ground into approximate rock powder samples with the same physical and mechanical parameters by using a ball mill;
preferably, in order to further simplify the preparation process flow of the similar rock dust sample and reduce the preparation cost, the similar rock dust sample is only required to have the same average grain size as the rock dust sample collected in S2;
s8: recording and analyzing test phenomena and results;
preferably, S8 includes, but is not limited to, recording and analyzing the following items:
1) the probe friction force f in S7 was measured, and the friction coefficient μ was calculated from the following formula:
f＝μN (5)
2) the mass loss Δ m of the probe before and after the measurement of S70And calculating the mass loss rate v of the probe at the unit sliding distance according to the following formulam：
3) And (4) measuring the micro-topography of the tail ends of the front probe and the rear probe of S7, and analyzing the wear failure mechanism of the rock breaking cutter material-compact core material.
4) Obtaining the wiping speed v by fitting1Law of influence on coefficient of friction μ:
wherein a, b, c and d are constants determined by the material composition of the probe and the contact load of the probe and the rock powder sample;
preferably, S8 further includes analyzing the following items:
researching composition of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of tight nuclear zone at edge bottom of cutter ringfieldCircumferential linear velocity v of cutter ring and positive pressure N to quality loss rate v of probemAnd the law of influence of the friction coefficient mu;
more preferably, S8 further includes analyzing the following items:
based on an Archard theoretical model, a wear coefficient K can be obtained by derivation according to the following formula (7) and is used for researching the influence rule between different sliding materials and different friction conditions in actual working conditions;
in the formula, H is a probe, namely the hardness of the cutter ring, and specifically is a Brinell hardness value; the others are as above.
Compared with the prior art, the invention has the advantages that:
1) the tool rock opposite grinding test method provided by the invention ensures that the change condition of the quality loss of the probe and the compact nuclear powder after opposite grinding can be accurately measured.
2) The opposite grinding test method for the cutter rock provided by the invention has higher similarity with the actual working condition of the hob under study; the concrete expression is as follows: the material of the cutter ring is similar to the physical mechanical property, and the physical mechanical property parameters of the rock are similar.
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In the principles of the invention as provided, it should be understood that the disclosed components and structures may be implemented in other ways. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. The terms first, second, etc. are used to denote names, but not any particular order.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. A rock breaking cutter material-compact core material pair grinding test method is characterized in that: the method comprises the following steps:
s1: acquiring basic information related to the frictional wear performance of the cutter ring, wherein the basic information includes but is not limited to installation size parameters of a hob of a cutter head, contour size parameters of the cutter ring, cutting parameters, material components and physical and mechanical performance parameters of the cutter ring, and physical and mechanical performance parameters of rock;
s2: collecting a rock powder sample, and obtaining the composition and physical and mechanical parameters of the rock powder sample;
s3: acquiring dynamic characteristic parameters related to the frictional wear performance of the cutter ring during rock breaking by rolling under the cutting depth h of the hob based on the basic information acquired in S1 by at least one means including but not limited to theory, simulation and test, wherein the dynamic characteristic parameters include but not limited to the stress level P of the compact nuclear area of the edge bottom of the cutter ringfieldThe circumferential linear velocity v of the cutter ring;
s4: preparing a probe with the same material composition and physical and mechanical property parameters as those of the cutter ring obtained in S1;
s5: loading the rock powder sample to ensure that the stress level of the rock powder sample reaches the stress level P of the compact nuclear area at the bottom of the cutter ring bladefield；
S6: the probe vertically penetrates into the rock powder sample at a given positive pressure N, wherein N satisfies the following formula (2):
N＝A·Pfield (2)
in the formula, A is the contact area of the probe and the rock powder sample;
s7: driving the probe at a swipe speed v1Horizontally and periodically wiping the rock powder sample in a reciprocating way, wherein the wiping distance is L;
s8: the test phenomena and results were recorded and analyzed.
2. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 1, wherein: the rock dust samples collected in S2 were from the compact nuclear region at the actual construction site of the hob and at the cutting test site of the hob under study.
3. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 1, wherein: the pattern of the probe prepared in S4 includes, but is not limited to, one of the following: the device comprises a cylinder, a cylinder with a tip at the tail end, a cylinder with a frustum at the tail end and a cylinder with a transition ball head at the tail end.
4. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 1, wherein: the probe prepared in the step S4 is the same as the hob ring in actual working conditions in material composition and physical and mechanical property parameters.
5. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 4, wherein: the probe prepared in the S4 has the same element components as the cutter ring, and the average mass fraction of each component element component of the probe is in the statistical range of the mass fraction of the corresponding element of the cutter ring; the average hardness of the probe is required to be within the statistical range of the hardness of the edge part of the cutter ring.
6. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 1, wherein: replacing the rock dust sample in the S5 execution process with the similar rock dust sample; the approximate rock dust sample had the same composition and physical mechanical parameters as the rock dust sample collected in S2.
7. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 6, wherein: the approximate rock dust sample is only required to have the same composition and average particle size as those of the rock dust sample collected in S2.
8. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 1, wherein: s8 includes, but is not limited to, recording and analyzing the following items:
1) the probe friction force f in S7 was measured, and the friction coefficient μ was calculated from the following formula:
f＝μN (4)
2) the mass loss Δ m of the probe before and after the measurement of S70And calculating the mass loss rate v of the probe at the unit sliding distance according to the following formulam：
3) Measuring the micro-topography of the tail ends of the front probe and the rear probe of S7, and analyzing the wear failure mechanism of the rock breaking cutter material-compact nuclear substance;
4) obtaining the wiping speed v by fitting1Law of influence on coefficient of friction μ:
wherein a, b, c and d are constants determined by the material composition of the probe and the contact load of the probe and the rock powder sample.
9. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 8, wherein: s8 also includes analyzing the following items:
researching composition of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of tight nuclear zone at edge bottom of cutter ringfieldCircumferential linear velocity v of cutter ring and positive pressure N to quality loss rate v of probemAnd the law of influence of the friction coefficient mu.
10. The rock breaking cutter material-compact core material pair abrasion test method as claimed in claim 9, wherein: s8 also includes analyzing the following items:
based on an Archard theoretical model, a wear coefficient K can be obtained by derivation according to the following formula (7) and is used for researching the influence rule between different sliding materials and different friction conditions in actual working conditions;
wherein H is the hardness of the probe.
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| CN113255174A (en) * | 2021-07-15 | 2021-08-13 | 西南石油大学 | Drilling tooth mechanics calculation method considering rock dynamic strength and mixed crushing mode |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266783A (en) * | 1997-03-28 | 1998-10-06 | Komatsu Ltd | Disk cutter wear detection method and wear detector |
| US20110031017A1 (en) * | 2009-08-04 | 2011-02-10 | Kawasaki Jukogyo Kabushiki Kaisha | Abrasion detecting apparatus detecting abrasion of component of cutter head and tunnel boring machine including abrasion detecting apparatus |
| KR20160066616A (en) * | 2014-12-02 | 2016-06-13 | 현대건설주식회사 | Apparatus and method for evaluating wear and abrasion of TBM disc cutter |
| CN105973738A (en) * | 2016-05-06 | 2016-09-28 | 中南大学 | Abrasiveness testing method of rock on tunnel boring machine (TBM) disc cutter ring |
| KR20170039799A (en) * | 2015-10-01 | 2017-04-12 | 현대건설주식회사 | Apparatus and method for evaluating wear and abrasion of slurry type TBM disc cutter |
| CN106570275A (en) * | 2016-11-07 | 2017-04-19 | 沈阳工业大学 | Method based on CAI value for predicting abrasion of TBM hobbing cutter |
| KR20170097336A (en) * | 2016-02-18 | 2017-08-28 | 삼성물산 주식회사 | Device for Measuring TBM Cutter Wear and Method for Measuring TBM Cutter Wear using the same |
| CN108020366A (en) * | 2018-02-08 | 2018-05-11 | 湘潭大学 | A kind of disk cutter sword bottom contact force distribution character test system and its test method |
| CN109489969A (en) * | 2019-01-26 | 2019-03-19 | 湘潭大学 | A kind of TBM hob sound loaded line cutting test platform |
| CN110529133A (en) * | 2019-10-08 | 2019-12-03 | 西南交通大学 | A kind of TBM disk cutter of cutter ring excircle fluting |
| CN111238953A (en) * | 2019-03-22 | 2020-06-05 | 湘潭大学 | Observation device for rock dense core derivation process |
-
2020
- 2020-12-18 CN CN202011522172.7A patent/CN112730134B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266783A (en) * | 1997-03-28 | 1998-10-06 | Komatsu Ltd | Disk cutter wear detection method and wear detector |
| US20110031017A1 (en) * | 2009-08-04 | 2011-02-10 | Kawasaki Jukogyo Kabushiki Kaisha | Abrasion detecting apparatus detecting abrasion of component of cutter head and tunnel boring machine including abrasion detecting apparatus |
| KR20160066616A (en) * | 2014-12-02 | 2016-06-13 | 현대건설주식회사 | Apparatus and method for evaluating wear and abrasion of TBM disc cutter |
| KR20170039799A (en) * | 2015-10-01 | 2017-04-12 | 현대건설주식회사 | Apparatus and method for evaluating wear and abrasion of slurry type TBM disc cutter |
| KR20170097336A (en) * | 2016-02-18 | 2017-08-28 | 삼성물산 주식회사 | Device for Measuring TBM Cutter Wear and Method for Measuring TBM Cutter Wear using the same |
| CN105973738A (en) * | 2016-05-06 | 2016-09-28 | 中南大学 | Abrasiveness testing method of rock on tunnel boring machine (TBM) disc cutter ring |
| CN106570275A (en) * | 2016-11-07 | 2017-04-19 | 沈阳工业大学 | Method based on CAI value for predicting abrasion of TBM hobbing cutter |
| CN108020366A (en) * | 2018-02-08 | 2018-05-11 | 湘潭大学 | A kind of disk cutter sword bottom contact force distribution character test system and its test method |
| CN109489969A (en) * | 2019-01-26 | 2019-03-19 | 湘潭大学 | A kind of TBM hob sound loaded line cutting test platform |
| CN111238953A (en) * | 2019-03-22 | 2020-06-05 | 湘潭大学 | Observation device for rock dense core derivation process |
| CN110529133A (en) * | 2019-10-08 | 2019-12-03 | 西南交通大学 | A kind of TBM disk cutter of cutter ring excircle fluting |
Non-Patent Citations (5)
| Title |
|---|
| JUNZHOU HUO等: "The multi-stage rock fragmentation load prediction model of tunnel boring machine cutter group based on dense core theory of tunnel boring machine cutter group based on dense core theory", 《INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 》 * |
| 孙伟等: "基于密实核理论的单滚刀多阶段受力预测模型", 《机械设计与制造》 * |
| 张桂菊等: "TBM盘形滚刀切削力学模型分析", 《中南大学学报(自然科学版)》 * |
| 张照煌: "全断面岩石掘进机平面刀盘上盘形滚刀磨损研究", 《现代隧道技术》 * |
| 高少磊等: "利用数值模拟估算TBM 刀具磨损量的方法", 《机械科学与技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113255174A (en) * | 2021-07-15 | 2021-08-13 | 西南石油大学 | Drilling tooth mechanics calculation method considering rock dynamic strength and mixed crushing mode |
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| CN112730134B (en) | 2023-10-13 |
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