CN112730134B - Rock breaking cutter material-compact core material counter grinding test method - Google Patents
Rock breaking cutter material-compact core material counter grinding test method Download PDFInfo
- Publication number
- CN112730134B CN112730134B CN202011522172.7A CN202011522172A CN112730134B CN 112730134 B CN112730134 B CN 112730134B CN 202011522172 A CN202011522172 A CN 202011522172A CN 112730134 B CN112730134 B CN 112730134B
- Authority
- CN
- China
- Prior art keywords
- rock
- probe
- powder sample
- core material
- following
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G01N3/58—Investigating machinability by cutting tools; Investigating the cutting ability of tools
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A rock breaking cutter material-compact core material counter grinding test method comprises the following steps: s1: acquiring basic information related to friction and wear performance of the cutter ring; s2: acquiring the composition components and physical and mechanical parameters of a rock powder sample; s3: acquiring parameters related to friction and wear performance of a cutter ring when the hob cuts depth h and rolls and breaks rock; s4: preparing a probe; s5: loading the rock powder sample to enable the stress level of the rock powder sample to reach the stress level P of the dense nuclear region of the blade bottom of the cutter ring field The method comprises the steps of carrying out a first treatment on the surface of the S6: the probe vertically penetrates into the rock powder sample at a given positive pressure N; s7: driving the probe to slide and wipe the rock powder sample for a certain distance L; s8: test phenomena and results were recorded and analyzed. The application can accurately measure the change condition of the mass loss of the probe and the compact nuclear powder after grinding, and has higher similarity with the actual working condition of the hob under study.
Description
Technical Field
The application belongs to the crossing field of mechanical engineering, geotechnical engineering and tunnel engineering, relates to a rock breaking cutter material-compact core material counter-grinding test method, and particularly relates to a rock breaking cutter material-compact core material counter-grinding test method considering the effect of grinding and sliding of a compact core material counter-blade bottom.
Background
Generalized rock breaking cutters including hobs, cutters, drills, pickaxes, etc. are widely used in mechanical engineering, geotechnical engineering and tunnel engineering, where: disc cutter (hereinafter referred to as cutter) is used for cutting and breaking hard rock, and is a main rock breaking cutter of a full-face hard rock tunnel boring machine (Tunneling boring machine, hereinafter referred to as 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. The rock breaking mechanism of the rock breaking tool is very complex due to severe and changeable stratum geological conditions, but extrusion rock breaking is one of the most common and wide rock breaking mechanisms of the rock breaking tool.
Taking a TBM hob as an example, specifically, the hob directly contacts and rolls and cuts rock by means of a cutter ring, and applies huge extrusion stress to enable the rock to be highly powdered and densified, so that a compact core similar to the processes of drilling, impact rock drilling, cutting pick cutting and the like is formed at the blade bottom; in the process of rock breaking by continuously revolving, rolling and pressing of the hob, the dense nuclear material at the blade bottom is periodically derived, developed and collapsed.
As is common in the aforementioned extrusion rock breaking mechanisms, the phenomenon of dense nuclei is widely present in the rock breaking process of the above-mentioned rock breaking tools, and the dynamic derivatization mechanism thereof definitely directly influences the rock breaking mechanism of the rock breaking tools and changes the boundary conditions of the tool-rock interaction, i.e. in the initial state, the hob comes into contact with the complete fresh rock mass, but in the relatively stable continuous rotary rolling rock breaking process, the contact with the blade bottom is not the complete fresh rock mass but dense nuclear material. In addition, according to the conclusion of a dense core theory proposed by soviet union expert A.H. Bilong in coal mining engineering, the dense core phenomenon at least has a great influence on the friction and wear performance of a hob ring, so that extremely adverse contact force characteristics are generated on a hob contact interface, and the hob wear service life is seriously shortened.
However, due to the lack of a feasible physical test device for simulating and reproducing the continuous grinding and sliding action of the compact nuclear substance on the edge bottom of the rock breaking cutter in the compact nuclear region, and the lack of a reasonable cutter opposite grinding test method for quantitatively and intensively researching the continuous grinding and sliding action process of the compact nuclear substance on the edge bottom of the rock breaking cutter, the compact nuclear phenomenon is not considered in the research of the friction and abrasion mechanism of the conventional hob ring material.
Therefore, the rock breaking cutter material-compact core material counter-grinding test method which is economical, convenient and meets engineering requirements is provided, and particularly relates to the rock breaking cutter material-compact core material counter-grinding test method which considers the effect of the compact core material on grinding and sliding the blade bottom, which is an urgent problem to be solved in the industry.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a rock breaking cutter material-compact core substance counter grinding test method, which comprises the following steps:
s1: basic information related to friction and wear performance of a hob ring (hereinafter referred to as a hob ring) under study is obtained, including but not limited to a cutterhead hob mounting dimension parameter (hob mounting radius R) i Hob spacing S c ) Cutter ring profile dimension parameter (cutter ring outer diameter R) c Equal cutter ring outline dimension parameter, cutter ring cutting edge width B c Angle of blade theta c Radius r of arc transition c Parameters of the equal cutter ring blade shape section size), cutting parameters (cutter disc rotating speed n and cutting depth H), material components of the cutter ring and physical and mechanical property parameters (density, poisson ratio, elastic modulus, impact toughness, yield strength, hardness H and the like), and physical and mechanical property parameters of rock (density, poisson ratio, elastic modulus and tensile strength sigma) t Compressive Strength sigma c Shear strength);
s2: collecting rock powder samples in a compact nuclear area of an actual construction site or a cutting test site of a researched hob, and obtaining composition components and physical mechanical parameters (including particle size, water content, density and the like) of the rock powder samples;
s3: the dynamic characteristic parameters related to the friction and wear performance of the cutter ring during the rolling and breaking of the rock under the cutting depth h of the hob are obtained based on the basic information obtained in the step S1 by at least one of theoretical, simulation and test means, including but not limited to the stress level P of the dense core region of the edge bottom of the cutter ring field KnifeA circle peripheral line speed v;
s4: preparing a probe with the same material composition and physical and mechanical performance parameters as those of the cutter ring obtained in the step S1;
s5: filling the rock powder sample acquired in the step S2 into a containing cavity between a loading head and a cavity, and applying extrusion load to the rock powder sample by using the loading head to ensure that the stress level of the rock powder sample reaches the stress level P of a dense nuclear area at the edge bottom of the cutter ring field ；
S6: the probe vertically penetrates into the rock powder sample at a given positive pressure N, wherein N meets the following formula (3), so that the contact stress between the probe and the rock powder sample reaches the stress level P of the dense nuclear region at the bottom of the cutter ring blade field ；
N＝A·P field (3)
Wherein A is the contact area between the probe and the rock powder sample;
preferably, the pattern of probes prepared in S4 includes, but is not limited to, one of the following patterns: the cylinder, the cylinder with the tip at the tail end, the cylinder with the frustum at the tail end and the cylinder with the transition ball head at the tail end;
s7: the probe is driven to horizontally and periodically slide and wipe the rock powder sample to a certain distance (marked as sliding distance L) at a sliding speed v 1 And the peripheral linear velocity v of the cutter ring is the same as that v, and L and v satisfy the following formula (3):
wherein t is the sliding 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 constituent 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 knife ring edge part;
preferably, a rock sample is collected from a cutter ring cutting site, and is ground into an approximate rock powder sample with the same physical and mechanical parameters as the rock powder sample collected in the step S2 by using a ball mill;
preferably, only the approximate rock dust sample is 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:
1) The probe friction force f in S7 is measured, and the friction coefficient μ is calculated from the following formula:
f＝μN (5)
2) Measurement of the Mass loss Δm of the Probe before and after S7 0 And calculating the mass loss rate v of the probe under the unit sliding distance according to the following formula m ：
3) Measuring the microcosmic appearance of the tail end of the probe before and after the step S7, and analyzing the abrasion failure mechanism of the rock breaking cutter material-compact nuclear material;
4) Obtaining the sliding speed v by the following fitting 1 Law 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-rock powder sample;
preferably, S8 further includes analyzing the following items:
research on composition components of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of dense nuclear region of knife ring edge bottom field The circumferential line speed v of the cutter ring and the mass loss rate v of the positive pressure N to the probe m And the law of influence of the coefficient of friction mu;
more preferably, S8 further comprises analyzing the following items:
based on an Archard theoretical model, the abrasion coefficient K can be obtained by deduction from the following formula (8);
wherein H is the probe hardness.
Compared with the prior art, the application has the following advantages:
1) The method for testing the tool rock counter grinding can accurately measure the quality change of the probe and the compact core powder after counter grinding.
2) The method for testing the tool rock opposite grinding has higher similarity with the actual working condition of the hob under study.
Drawings
The device according to the application is further described below with reference to the drawings and examples.
Fig. 1 is a schematic three-dimensional structure of a friction and wear test device for a rock breaking cutter material.
Fig. 2 is a schematic three-dimensional structure of a friction and wear test device for rock breaking cutter materials according to another view angle of the application.
Fig. 3 is a perspective sectional view obtained 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 view of the three-dimensional structure of the upper die of fig. 1.
FIG. 6 is a flow chart of a method of testing a rock breaking tool material-dense core material counter-grinding in accordance with the present application.
Fig. 7 is a finite element model diagram of probe intrusion into compact nuclear powder.
FIG. 8 is a graph comparing intrusion of different probe tips into compact nuclear powder.
Description of the main reference signs
| 1 | Base seat |
| 11 | Loading head |
| 2 | Upper pressing die |
| 21 | Cavity cavity |
| 22 | Slit(s) |
| 3 | Probe installation slipway |
| 32 | Probe with a probe tip |
Detailed Description
The application provides a rock breaking cutter material-compact core material counter grinding test method, which comprises the following steps as shown in figure 5:
s1: basic information related to friction and wear performance of a hob ring (hereinafter referred to as a hob ring) under study is obtained, including but not limited to a cutterhead hob mounting dimension parameter (hob mounting radius R) i Hob spacing S c ) Cutter ring profile dimension parameter (cutter ring outer diameter R) c Equal cutter ring outline dimension parameter, cutter ring cutting edge width B c Angle of blade theta c Radius r of arc transition c Parameters of the equal cutter ring blade shape section size), cutting parameters (cutter disc rotating speed n and cutting depth h), material components of the cutter ring and physical and mechanical property parameters (density, poisson ratio, elastic modulus, impact toughness, yield strength, hardness and the like), and physical and mechanical property parameters of rock (density, poisson ratio, elastic modulus and tensile strength sigma) t Compressive Strength sigma c Shear strength);
s2: collecting rock powder samples in a compact nuclear area of an actual construction site or a cutting test site of a researched hob, and obtaining composition components and physical mechanical parameters (including particle size, water content, density and the like) of the rock powder samples; for example, observing the particle size distribution of rock powder samples in a compact nuclear area by adopting a microscope, and calculating the average particle size;
s3: the dynamic characteristic parameters related to the friction and wear performance of the cutter ring during the rolling and breaking of the rock under the cutting depth h of the hob are obtained based on the basic information obtained in the step S1 by at least one of theoretical, simulation and test means, including but not limited to the stress level P of the dense core region of the edge bottom of the cutter ring field The circumferential linear velocity v of the cutter ring; more specifically, in this example, the bottom contact stress level P of the cutter ring edge during rock breaking by rolling and pressing of the hob can be obtained by adopting a simulation analysis means, such as transient nonlinear dynamics software simulation of ANSYS/LS-DYNA, abaqus and the like field Vertical cutting force F of knife ring v The peripheral line velocity v of the cutter ring can also be obtained by theoretical analysis means, for example, by calculating and obtaining P by referring to the pressure of the dense nuclear region after rock invasion of the blunt cutter shown in the following formula (1) field The method comprises the steps of carrying out a first treatment on the surface of the In the model, the compact nuclear area is assumed to be in a hydrostatic pressure state, namely the pressures in the compact nuclear area are equal;
s4: preparing a probe with the same material composition and physical and mechanical performance parameters as those of the cutter ring obtained in the step S1; in the example, a probe is prepared by adopting a cutter ring common material H13 steel;
s5: filling the rock powder sample acquired in the step S2 into a containing cavity between a loading head and a cavity, and applying extrusion load to the rock powder sample by using the loading head to ensure that the stress level of the rock powder sample reaches the stress level P of a dense nuclear area at the edge bottom of the cutter ring field For simulating the confining pressure of rock powder in the compacted core area, i.e. for simulating the compacted core material (i.e. the stress level P of the compacted core area with the knife ring edge bottom field Rock dust of (a); in this example, P field Applied according to the following formula (2):
wherein F is t Is the pretightening tension of a single bolt, A 1 Is the area of the loading head;
s6: the probe vertically penetrates into the rock powder sample at a given positive pressure N, wherein N meets the following formula (3), so that the contact stress between the probe and the rock powder sample reaches the stress level P of the dense nuclear region at the bottom of the cutter ring blade field The method comprises the steps of carrying out a first treatment on the surface of the In this way, the probe may remain stationary in a vertical direction relative to the surface of the rock dust sample;
N＝A·P field (3)
in this example, n= (m+m) 0 ) g; a is the contact area between the probe and the rock powder sample; m and m 0 Respectively the weight mass and the probe mass;
more specifically, in this example, the step S6 is specifically performed using a rock breaking tool material-dense core material counter-grinding test apparatus. As shown in fig. 1 to 4, the rock breaking cutter material-compact nuclear material counter grinding 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 upper center of the base 1;
the upper pressing die 2 is positioned right above the base 1; a cavity 21 is formed inwards at the center of the lower part of the upper pressing die 2; as shown in fig. 5, a slit 22 communicating with the cavity 21 is formed at the upper center position of the upper die 2; under the action of a given tensile force, the upper pressing die 2 vertically presses the base 1 downwards along the length direction of the loading head 11, and the probe mounting sliding table 3 moves freely in a reciprocating manner right above the upper pressing die 2 along the length direction of the slit 22; a probe through hole is formed in the top of the probe mounting sliding table 3; the lower end of the probe 32 sequentially and movably passes through the probe through hole and the slit 22, then contacts the rock powder, and applies a given positive pressure N to the rock powder below the probe;
the power transmission system drives the probe installation sliding table 3 to reciprocate relative to the upper pressing die 2, so that rock powder in a given confining pressure stress state is simulated to repeatedly grind and slide the hob edge base material according to a given positive pressure N;
preferably, the pattern of probes 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 in sequence;
s7: the probe is driven to horizontally and periodically slide and wipe the rock powder sample to a certain distance (marked as sliding distance L) at a sliding speed v 1 And the peripheral linear velocity v of the cutter ring is the same as that v, and L and v satisfy the following formula (4):
wherein t is the sliding time;
preferably, in order to simplify the preparation flow and test calibration time of the probe, in S4, the probe is only required to have the same element components as the cutter ring, and the average mass fraction of each component element component of the probe is within the statistical range of the mass fraction of the corresponding element of the cutter ring, in consideration of the fluctuation of the material components and the physical mechanical properties of the cutter ring and the difference of the prepared probe; the average hardness of the probe is required to be within the statistical range of the hardness of the knife ring edge part; in this way, the rock powder sample adopted in the rock breaking cutter material-dense core material pair grinding test has the same composition and physical and mechanical properties as rock powder in the blade bottom dense core area when the hob rolls to break rock in the actual working condition;
preferably, considering that the amount of the rock powder sample collected in the step S2 is small and insufficient to meet the requirement of a large-batch test, collecting the rock sample from a cutter ring cutting site, and grinding the rock sample into an approximate rock powder sample with the same physical and mechanical parameters as the rock powder sample collected in the step S2 by using a ball mill;
preferably, in order to further simplify the preparation process flow of the approximate rock powder sample, and reduce the preparation cost, it is only required that the approximate rock powder sample has the same average particle size as the rock powder 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:
1) The probe friction force f in S7 is measured, and the friction coefficient μ is calculated from the following formula:
f＝μN (5)
2) Measurement of the Mass loss Δm of the Probe before and after S7 0 And calculating the mass loss rate v of the probe under the unit sliding distance according to the following formula m ：
3) And (7) measuring the microcosmic appearance of the tail end of the probe before and after the step S7, and analyzing the abrasion failure mechanism of the rock breaking cutter material-compact nuclear substance.
4) Obtaining the sliding speed v by the following fitting 1 Law 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-rock powder sample;
preferably, S8 further includes analyzing the following items:
research on composition components of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of dense nuclear region of knife ring edge bottom field The circumferential line speed v of the cutter ring and the mass loss rate v of the positive pressure N to the probe m And the law of influence of the coefficient of friction mu;
more preferably, S8 further comprises analyzing the following items:
based on an Archard theoretical model, the abrasion coefficient K can be obtained by deduction from 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, namely the cutter ring, and particularly the Brinell hardness value; the others are the same as above.
Compared with the prior art, the application has the following advantages:
1) The method for testing the tool rock counter grinding ensures that the change condition of the quality loss after the counter grinding of the probe and the compact nuclear powder can be accurately measured.
2) The method for testing the tool rock opposite grinding has higher similarity with the actual working condition of the hob to be researched; the concrete steps are as follows: the cutter ring material is similar to the physical and mechanical properties, and the physical and mechanical properties of the rock are similar to those of the rock.
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. The embodiments of the present application and the features in the embodiments may be combined with each other without collision. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the described embodiments are merely some, rather than all, embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.
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 application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the working principles provided by the present application, 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 application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application 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 evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. The terms first, second, etc. are used to denote a name, but not any particular order.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present application.
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: basic information related to the friction and wear performance of the cutter ring is obtained, wherein the basic information comprises, but is not limited to, cutter head hob installation size parameters, cutter ring outline size parameters, cutting parameters, material components and physical mechanical performance parameters of the cutter ring and physical mechanical performance parameters of rock;
s2: collecting a rock powder sample, and acquiring composition components and physical and mechanical parameters of the rock powder sample;
s3: the dynamic characteristic parameters related to the friction and wear performance of the cutter ring during the rolling and breaking of the rock under the cutting depth h of the hob are obtained based on the basic information obtained in the step S1 by at least one of theoretical, simulation and test means, including but not limited to the stress level P of the dense core region of the edge bottom of the cutter ring field The circumferential linear velocity v of the cutter ring;
s4: preparing a probe with the same material composition and physical and mechanical performance parameters as those of the cutter ring obtained in the step S1;
s5: directional rockLoading the powder sample to enable the stress level of the rock powder sample to reach the stress level P of the dense nuclear region at the edge bottom of the cutter ring field ；
S6: the probe vertically penetrates the rock dust sample at a given positive pressure N, N satisfying the following formula (2):
N＝A·P field (2)
wherein A is the contact area between the probe and the rock powder sample;
s7: driving the probe at a sliding speed v 1 Horizontally and periodically sliding and wiping the rock powder sample in a reciprocating manner, wherein the sliding and wiping distance is L;
s8: test phenomena and results were recorded and analyzed.
2. The rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: the rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: the rock powder sample collected in the step S2 is from a dense nuclear area selected from the actual construction site of the hob and the cutting test site of the hob.
3. The rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: the patterns of the probe prepared in S4 include, but are not limited to, one of the following patterns: the cylinder, the cylinder with the tip at the end, the cylinder with the frustum at the end and the cylinder with the transition ball head at the end.
4. The rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: and S4, the prepared probe is the same as the material composition and physical and mechanical performance parameters of the hob ring in the actual working condition.
5. The method for testing the rock breaking tool material-dense core material pair grinding according to claim 4, wherein the method comprises the following steps of: 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 a statistical range of the hardness of the knife ring blade.
6. The rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: adopting an approximate rock powder sample to replace the rock powder sample in the S5 executing process; the approximate rock dust sample has the same composition and physical mechanical parameters as the rock dust sample collected in S2.
7. The method for testing the rock breaking tool material-dense core material pair grinding according to claim 6, wherein the method comprises the following steps of: the approximate rock powder sample is only required to have the same composition and average particle size as the rock powder sample collected in S2.
8. The rock breaking tool material-compact core material counter grinding test method according to claim 1, wherein the rock breaking tool material-compact core material counter grinding test method comprises the following steps of: s8 includes, but is not limited to, recording and analyzing the following:
1) The probe friction force f in S7 is measured, and the friction coefficient μ is calculated from the following formula:
f＝μN (4)
2) Measurement of the Mass loss Δm of the Probe before and after S7 0 And calculating the mass loss rate v of the probe under the unit sliding distance according to the following formula m ：
3) Measuring the microcosmic appearance of the tail end of the probe before and after the step S7, and analyzing the abrasion failure mechanism of the rock breaking cutter material-compact nuclear material;
4) Obtaining the sliding speed v by the following fitting 1 Law of influence on coefficient of friction μ:
where a, b, c and d are constants determined by the material composition of the probe and the contact load of the probe-rock powder sample.
9. The method for testing the rock breaking tool material-dense core material pair grinding according to claim 8, wherein the method comprises the following steps of: s8 also includes analyzing the following items:
research on composition components of rock powder sample, physical and mechanical parameters of rock powder sample and stress level P of dense nuclear region of knife ring edge bottom field The circumferential line speed v of the cutter ring and the mass loss rate v of the positive pressure N to the probe m And the law of influence of the coefficient of friction mu.
10. The method for testing the rock breaking tool material-dense core material pair grinding according to claim 9, wherein the method comprises the following steps of: s8 also includes analyzing the following items:
based on an Archard theoretical model, the abrasion coefficient K can be obtained by deduction from 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 probe hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011522172.7A CN112730134B (en) | 2020-12-18 | 2020-12-18 | Rock breaking cutter material-compact core material counter grinding test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011522172.7A CN112730134B (en) | 2020-12-18 | 2020-12-18 | Rock breaking cutter material-compact core material counter grinding test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112730134A CN112730134A (en) | 2021-04-30 |
| CN112730134B true CN112730134B (en) | 2023-10-13 |
Family
ID=75605650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011522172.7A Active CN112730134B (en) | 2020-12-18 | 2020-12-18 | Rock breaking cutter material-compact core material counter grinding test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112730134B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113255174B (en) * | 2021-07-15 | 2021-09-17 | 西南石油大学 | Drilling tooth mechanics calculation method considering rock dynamic strength and mixed crushing mode |
Citations (10)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5400522B2 (en) * | 2009-08-04 | 2014-01-29 | 川崎重工業株式会社 | Wear detection device for components in cutter head and tunnel excavator provided with the same |
-
2020
- 2020-12-18 CN CN202011522172.7A patent/CN112730134B/en active Active
Patent Citations (10)
| 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 |
| 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 |
|---|
| TBM盘形滚刀切削力学模型分析;张桂菊等;《中南大学学报(自然科学版)》;第2792-2799页 * |
| 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;Junzhou Huo等;《INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 》;第277-289页 * |
| 全断面岩石掘进机平面刀盘上盘形滚刀磨损研究;张照煌;《现代隧道技术》;第32-36页 * |
| 利用数值模拟估算TBM 刀具磨损量的方法;高少磊等;《机械科学与技术》;第717-721页 * |
| 基于密实核理论的单滚刀多阶段受力预测模型;孙伟等;《机械设计与制造》;第9-12页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112730134A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhao et al. | Effects of jointed rock mass and mixed ground conditions on the cutting efficiency and cutter wear of tunnel boring machine | |
| Macias et al. | New rock abrasivity test method for tool life assessments on hard rock tunnel boring: the rolling indentation abrasion test (RIAT) | |
| Cho et al. | Optimum spacing of TBM disc cutters: A numerical simulation using the three-dimensional dynamic fracturing method | |
| Snowdon et al. | A study of disc cutting in selected British rocks | |
| Adachi et al. | Determination of rock strength parameters from cutting tests | |
| CN111946398B (en) | Composite stratum shield tunneling efficiency field prediction calculation method | |
| CN113418795B (en) | Drilling test system and method for predicting uniaxial compressive strength of coal rock mass | |
| CN112666033B (en) | TBM hob ring-rock opposite grinding similarity test design method | |
| CN103969141A (en) | A hard rock hobbing cutter rock breaking characteristic testing device | |
| Pan et al. | Full-scale linear cutting tests to check and modify a widely used semi-theoretical model for disc cutter cutting force prediction | |
| CN112949043B (en) | Geological evaluation method for sandy pebble stratum shield tunnel | |
| CN112730134B (en) | Rock breaking cutter material-compact core material counter grinding test method | |
| US20230228189A1 (en) | Method for evaluating rock drillability by nano-indentation test on rock cutting | |
| CN116029159A (en) | Rotary-cut drilling in-situ detection method for surrounding rock of underground engineering | |
| CN114202160A (en) | Fuzzy comprehensive evaluation method for rock drillability | |
| Aresh et al. | Experimental investigation and numerical simulation of chip formation mechanisms in cutting rock-like materials | |
| Geng et al. | Application of full-scale experimental cutterhead system to study penetration performance of tunnel boring machines (TBMs) | |
| Hamzaban et al. | Wear of cutting tools in hard rock excavation process: A critical review of rock abrasiveness testing methods | |
| Fowell et al. | A review of the Cerchar and LCPC rock abrasivity measurement methods | |
| Mostofi et al. | Drilling response of impregnated diamond bits: an experimental investigation | |
| Cardu et al. | Experimental laboratory tests focused on rock characterisation for mechanical excavation | |
| Cardu et al. | Metal-rock pair characterization in excavation engineering | |
| Qayyum | Effects of bit geometry in multiple bit-rock interaction | |
| Ghasemi | Study of CERCHAR abrasivity index and potential modifications for more consistent measurement of rock abrasion | |
| Ramezanzadeh et al. | Impact of rock mass characteristics on hard rock tunnel boring machine performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230911 Address after: No. 306, No. 3, Tanzhou Renmin Road, Dagang Town, Nansha District, Guangzhou City, Guangdong Province, 510000 Applicant after: CREC SUNWARD INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 410000, Building 1203-1205, Wantai Building, Wangcheng Economic and Technological Development Zone, Changsha City, Hunan Province (cluster registration) Applicant before: Hunan Hao'er Information Consulting Co.,Ltd. Effective date of registration: 20230911 Address after: 410000, Building 1203-1205, Wantai Building, Wangcheng Economic and Technological Development Zone, Changsha City, Hunan Province (cluster registration) Applicant after: Hunan Hao'er Information Consulting Co.,Ltd. Address before: 411105 Xiangtan University, Yuhu District, Xiangtan City, Hunan Province Applicant before: XIANGTAN University |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |