CN115824554B - Device and method for testing impact resistance and fatigue life of cutter of shield tunneling machine - Google Patents
Device and method for testing impact resistance and fatigue life of cutter of shield tunneling machine Download PDFInfo
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- CN115824554B CN115824554B CN202310005469.3A CN202310005469A CN115824554B CN 115824554 B CN115824554 B CN 115824554B CN 202310005469 A CN202310005469 A CN 202310005469A CN 115824554 B CN115824554 B CN 115824554B
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Abstract
The invention discloses an impact resistance and fatigue life testing device and method of a cutter of a shield machine. The device and the method for testing the shock resistance and the fatigue life of the cutter of the shield machine have the advantages of simple structure, convenient operation, capability of detecting the shock resistance and the fatigue life of the cutter of the shield machine under different working conditions, good practicability and suitability for popularization and use.
Description
Technical Field
The invention relates to the technical field of cutter measurement, in particular to a device and a method for testing the shock resistance and fatigue life of a cutter of a shield machine.
Background
The shield tunneling machine is tunneling equipment special for tunnels and is widely applied to the construction of various underground projects. The cutter arranged on the cutter head of the shield machine is used for crushing rocks, and the cutter repeatedly collides with the rocks in the tunneling process, so that the cutter is subjected to the impact force of the rocks for a long time, fatigue cracking is easy to cause, and further, the project construction is difficult.
It is therefore necessary to test the impact resistance and fatigue life of the cutters so that the skilled person knows the impact resistance and fatigue life of the cutters. The existing testing device is complex in structure, troublesome in operation, and poor in practicality, and the impact resistance and the fatigue life of the cutter under different working conditions cannot be detected.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the device for testing the impact resistance and the fatigue life of the cutter of the shield machine is simple in structure, convenient to operate, capable of detecting the impact resistance and the fatigue life of the cutter of the shield machine under different working conditions, and suitable for popularization and use.
The invention also provides a method based on the device for testing the impact resistance and the fatigue life of the cutter of the shield machine.
According to the embodiment of the invention, the shock resistance and fatigue life testing device of the shield tunneling machine cutter comprises a frame, a cutter holder and a conveying mechanism, wherein the cutter holder can be installed on the frame in a lifting manner, the cutter holder is provided with the cutter, a force sensor is arranged between the cutter holder and the cutter, the conveying mechanism is provided with a plurality of fixing seats along the conveying direction, the fixing seats are provided with fixing cavities for placing rocks, one ends of the fixing cavities, which deviate from the conveying mechanism, are provided with pick-and-place openings, bearing parts are arranged in the fixing cavities, the bearing parts can be moved and adjusted along the direction close to or far from the pick-and-place openings, the bearing parts are used for bearing the rocks, and the conveying mechanism is used for driving the rocks to strike the cutter.
The device for testing the shock resistance and the fatigue life of the cutter of the shield machine has at least the following beneficial effects:
according to the invention, when the shock resistance and the fatigue life of the cutter of the shield machine are required to be tested, rock is arranged in the fixed cavity of the fixed seat, the rock part extends out of the fixed cavity, the cutter is arranged on the cutter holder, the cutter holder is lifted so that the cutter is positioned on the moving path of the rock, then the conveying mechanism is started, the conveying mechanism drives the rock to sequentially strike the cutter, the force sensor is used for recording the impact load value when the cutter collides with the rock, and meanwhile, the damage condition of the cutter is observed and recorded. Finally, the recorded impact load value and the damage condition of the cutter are analyzed, so that the impact resistance and the fatigue life of the cutter can be obtained, and the cutter has a simple structure and is convenient to operate. In addition, in the in-process that detects, can carry out the lift adjustment to the blade holder to make the cutter collide with the not co-altitude position of rock, and then can detect impact resistance and the fatigue life of cutter under different penetration, also can adjust conveying mechanism's conveying speed, so that cutter and rock have different collision speed, and then impact resistance and the fatigue life when can detecting the collision speed between cutter and the rock, namely can detect impact resistance and the fatigue life of shield machine cutter under different operating modes, and then can provide the guidance for the optimal design of cutter, be suitable for using widely. In addition, through removing the portion of bearing, can adjust the distance of bearing and getting between the mouth of putting, and then not only can be applicable to the rock of different thickness, even the rock is cut once after moreover, still can used repeatedly, the practicality is good.
According to some embodiments of the invention, the frame is vertically provided with a lifting cylinder, the tool apron is arranged on the lifting cylinder, a guide mechanism is arranged between the tool apron and the frame, and the guide mechanism is used for enabling the tool apron to move vertically.
According to some embodiments of the invention, the guiding mechanism comprises a plurality of guiding rods vertically arranged on the frame, and the tool apron is provided with a plurality of guiding holes and sleeved with the guiding rods through the guiding holes.
According to some embodiments of the invention, the rack is provided with a sliding table in a sliding manner along a first horizontal direction, the sliding table is provided with a mounting frame in a sliding manner along a second horizontal direction perpendicular to the first horizontal direction, and the conveying mechanism is arranged on the mounting frame.
According to some embodiments of the invention, the transport mechanism comprises:
the two driving wheels are arranged on the frame;
the conveying belt is arranged between the two driving wheels, and the fixing seat is arranged on the conveying belt;
the collision speed when the rock collides with the cutter is expressed as:
wherein R is the radius of the driving wheel, and n is the rotating speed of the driving wheel.
According to some embodiments of the invention, a threaded hole is formed in the side wall of the fixing seat, and a locking bolt is connected to the threaded hole in a threaded mode and used for abutting against the rock.
According to some embodiments of the present invention, one end of the bearing portion, which is far away from the picking and placing port, is provided with two inclined planes, the two inclined planes are arranged along a set direction, the set direction is perpendicular to a moving direction of the bearing portion, the two inclined planes extend obliquely in a direction, which is far away from each other, which is close to the picking and placing port, the end of the fixing cavity, which is far away from the picking and placing port, is slidably provided with two adjusting blocks along the set direction, the adjusting blocks are in one-to-one correspondence with the inclined planes, the end surfaces, which are close to the picking and placing port, of the adjusting blocks are parallel and are attached to the corresponding inclined planes, the fixing seat is rotatably provided with an adjusting screw extending along the set direction, the adjusting screw is provided with two sections of external threads with opposite rotation directions, and the two sections of external threads are respectively connected with the two adjusting blocks in a threaded manner.
According to some embodiments of the invention, the force sensor is configured as a three-way force sensor.
According to the method for testing the impact resistance and the fatigue life of the shield machine cutter, which is provided by the embodiment of the second aspect of the invention, the method comprises the following steps of:
s100, placing rock in a fixed cavity of a fixed seat, mounting a cutter on a cutter holder, and lifting the cutter holder so that the cutter is positioned on a moving path of the rock;
s200, starting a conveying mechanism, wherein the conveying mechanism drives the rock to sequentially strike the cutters, and recording impact load values when the cutters collide with the rock through a force sensor and observing and recording damage conditions of the cutters;
wherein, the step S200 includes at least one of the following steps:
s201, lifting and adjusting the cutter holder so that the cutter collides with different height positions of the rock;
s202, adjusting the conveying speed of the conveying mechanism so that the cutter and the rock have different collision speeds;
s300, analyzing the recorded impact load value and the damage condition of the cutter to obtain the impact resistance and the fatigue life of the cutter.
The method for testing the shock resistance and the fatigue life of the cutter of the shield machine has at least the following beneficial effects:
the method for testing the impact resistance and the fatigue life of the cutter of the shield machine is convenient to operate, in the detection process, the cutter holder can be lifted and adjusted to enable the cutter to collide with different height positions of the rock, further the impact resistance and the fatigue life of the cutter under different penetration degrees can be detected, the conveying speed of the conveying mechanism can be adjusted to enable the cutter to have different impact speeds with the rock, further the impact resistance and the fatigue life of the cutter of the shield machine under different working conditions can be detected, namely the impact resistance and the fatigue life of the cutter of the shield machine under different working conditions can be detected, further guidance can be provided for the optimal design of the cutter, and the method is suitable for popularization and use.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of the fixing base;
FIG. 3 is a schematic structural view of a fixing base;
fig. 4 is a schematic structural view of the bearing part in fig. 3 in another state.
Reference numerals:
a frame 100; a lift cylinder 101; a guide bar 102; a slide table 103; a mounting frame 104; a hydraulic power unit 105;
a tool holder 200; a cutter 201;
a conveying mechanism 300; a fixing base 301; a drive wheel 302; a conveyor belt 303; a fixed cavity 304; a threaded hole 305; a locking bolt 306; a carrying portion 307; a ramp 308; an adjustment block 309; an adjusting screw 310; an external thread 311;
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, inner, outer, top, bottom, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The shock resistance and fatigue life testing device and method of the cutter of the shield machine according to the embodiment of the invention are described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, the device for testing impact resistance and fatigue life of a cutter of a shield machine according to the first aspect of the present invention includes a frame 100, a cutter holder 200 and a conveying mechanism 300, wherein the cutter holder 200 is installed on the frame 100 in a lifting manner, the cutter holder 200 is installed with a cutter 201, a force sensor is disposed between the cutter holder 200 and the cutter 201, the conveying mechanism 300 is provided with a plurality of fixing seats 301 along a conveying direction, the fixing seats 301 are used for installing rocks 400, and the conveying mechanism 300 is used for driving the rocks 400 to strike the cutter 201. The fixing base 301 is provided with a fixing cavity 304 for placing the rock 400, and one end of the fixing cavity 304, which is away from the conveying mechanism 300, is provided with a taking and placing opening. The fixed cavity 304 is internally provided with a bearing part 307, the bearing part 307 can be moved and adjusted along the direction close to or far from the picking and placing port, and the bearing part 307 is used for bearing the rock 400.
In the invention, when the shock resistance and fatigue life of the cutter 201 of the shield tunneling machine are required to be tested, the rock 400 is arranged in the fixed cavity 304 of the fixed seat 301, the part of the rock 400 extends out of the fixed cavity 304, the cutter 201 is arranged on the cutter holder 200, the cutter holder 200 is lifted so that the cutter 201 is positioned on the moving path of the rock 400, then the conveying mechanism 300 is started, the conveying mechanism 300 drives the rock 400 to sequentially strike the cutter 201, the force sensor records the impact load value when the cutter 201 collides with the rock 400, and meanwhile, the damage condition of the cutter 201 is observed and recorded. Finally, the recorded impact load value and the damage condition of the cutter 201 are analyzed, so that the impact resistance and the fatigue life of the cutter 201 can be obtained, and the cutter has a simple structure and is convenient to operate. In addition, in the detection process, the tool apron 200 can be lifted and adjusted so as to enable the cutter 201 to collide with different height positions of the rock 400, further, the impact resistance and the fatigue life of the cutter 201 under different penetration degrees can be detected, and the conveying speed of the conveying mechanism 300 can be adjusted so as to enable the cutter 201 to have different collision speeds with the rock 400, further, the impact resistance and the fatigue life of the cutter 201 and the rock 400 at different collision speeds can be detected, namely, the impact resistance and the fatigue life of the cutter 201 of the shield machine under different working conditions can be detected, further, guidance can be provided for the optimal design of the cutter 201, and the shield machine is suitable for popularization and use. In addition, the distance between the bearing part 307 and the picking and placing port can be changed in the moving adjustment process, so that the device is suitable for rocks 400 with different thicknesses, for example, when the thickness of the rocks 400 is smaller, the bearing part 307 can be moved, the distance between the bearing part 307 and the picking and placing port is reduced, the rocks 400 can extend out of the fixed cavity 304 to collide with the cutter 201, after the rocks 400 are cut once by the cutter 201, the bearing part 307 can be moved, the distance between the bearing part 307 and the picking and placing port is reduced, and the rest of the rocks 400 can be used, so that the practicality is good.
It should be noted that when the cutter 201 needs to be detected, the cutter holder 200 may be lowered, so as to drive the cutter 201 to move to the moving path of the rock 400, so that the cutter 201 collides with the rock 400, and when the cutter 201 does not need to be detected, the cutter 201 is moved away from the moving path of the rock 400, so that the cutter 201 is prevented from randomly colliding with the rock 400, and the safety is better. Cutter 201 may be a cutter used in an actual shield machine to make detection more accurate. The force sensor may be a three-way force sensor, so as to detect the three-phase load force applied to the cutter 201, and the detection is more accurate, and of course, the force sensor may be other sensors, for example, a one-way sensor. The force sensor can be connected with the controller, and the controller can be connected with the display screen, and then can show the load force that the force sensor detected in real time. The number of times the force sensor detects the load force, that is, the number of times the rock 400 collides with the cutter 201, so that the force sensor records the number of times the force sensor detects the load force, that is, the number of times the rock 400 collides with the cutter 201 can be recorded, and the fatigue life of the cutter 201 can be analyzed through the number of times of collisions and the damage condition of the cutter 201. In addition, in the actual working condition, the speed of the cutter 201 is faster at the position closer to the center of the cutter head of the shield machine, so that the condition that the cutter 201 cuts the rock 400 at different positions on the cutter head of the shield machine can be just simulated by adjusting the collision speed between the cutter 201 and the rock 400. In addition, the rock 400 made of different materials can be installed on the fixing seat 301, so that the cutter 201 can be simulated to cut rock strata with different geology. The fixing base 301 may be welded to the conveying mechanism 300, or may be bolted or clamped to the conveying mechanism 300. In addition, fig. 2 is a schematic view illustrating the arrangement of the fixing bases 301, which is only for illustrating how the fixing bases 301 are arranged, so that only one fixing base 301 is provided on the conveying mechanism 300, which is not a limitation that the conveying mechanism 300 is provided with only one fixing base 301. In addition, a camera may be provided on the frame 100, through which the collision process of the cutter 201 with the rock 400 is observed and recorded, and at the same time, the damage condition of the cutter 201 can be observed through the camera.
It can be understood that the recorded impact load value, that is, the impact force received by the cutter 201, can analyze the damage condition of the cutter 201 under different impact forces and different times of impact by the recorded damage condition of the cutter 201, so as to know the impact resistance and fatigue life of the cutter 201.
In some embodiments of the present invention, as shown in fig. 1, the stand 100 is vertically provided with a lift cylinder 101, the tool holder 200 is provided with the lift cylinder 101, and a guide mechanism is provided between the tool holder 200 and the stand 100, and the guide mechanism is used to move the tool holder 200 vertically. The hydraulic power device 105 such as a hydraulic station can be arranged, the hydraulic power device 105 is connected with the lifting oil cylinder 101 through a hydraulic pipeline, the lifting oil cylinder 101 can control the lifting of the tool apron 200 through the control of the hydraulic power device 105, and the operation is convenient, time-saving and labor-saving. In addition, setting up guiding mechanism, not only can make blade holder 200 lift more accurate, and when cutter 201 received rock 400's impact, and when leading to blade holder 200 to receive transverse force, guiding mechanism can strengthen structural strength, avoids lift cylinder 101 to appear buckling even cracked condition. It should be noted that, the elevation of the tool holder 200 may be controlled by other means, for example, by controlling the elevation of the tool holder 200 by a motor screw mechanism.
In some embodiments of the present invention, as shown in fig. 1, the guide mechanism includes a plurality of guide rods 102 vertically provided on the frame 100, and the tool holder 200 is provided with a plurality of guide holes and the guide rods 102 are sleeved through the guide holes. The tool apron 200 can be guided through the matching of the guide rod 102 and the guide hole, and the structure is simple and the guide effect is good. It should be noted that the guiding mechanism may have other structures, for example, a guide rail vertically disposed on the frame 100, and the tool holder 200 is slidably mounted on the guide rail.
In some embodiments of the present invention, as shown in fig. 1, a sliding table 103 is slidably disposed on a frame 100 along a first horizontal direction, a mounting frame 104 is slidably disposed on the sliding table 103 along a second horizontal direction perpendicular to the first horizontal direction, and a conveying mechanism 300 is disposed on the mounting frame 104. Through slip regulation slip table 103 and slip regulation mounting bracket 104, can make rock 400 on the conveying mechanism 300 aim at cutter 201 more accurately to make the detection effect better. The first horizontal direction and the second horizontal direction are not specific horizontal directions, but are both horizontal directions and perpendicular to each other in order to define the sliding direction of the slide table 103 and the sliding direction of the mounting frame 104, and for example, the first horizontal direction may be the conveying direction of the conveying mechanism 300. In addition, the sliding manner of the sliding table 103 and the mounting frame 104 is controlled in various manners, for example, the sliding table 103 and the mounting frame 104 can be controlled by an oil cylinder or a motor screw mechanism, which are common driving mechanisms and are not described herein.
In some embodiments of the present invention, as shown in fig. 1, the conveying mechanism 300 includes two driving wheels 302 and a conveyor belt 303, the two driving wheels 302 are rotatably mounted on the frame 100, the conveyor belt 303 is mounted between the two driving wheels 302, and the fixing base 301 is provided on the conveyor belt 303. The collision speed when the rock 400 collides with the cutter 201 is expressed as:
where R is the radius of the driving wheel 302 and n is the rotational speed of the driving wheel 302.
The driving wheel 302 is connected with a driving motor in a transmission way, the driving motor is started, the driving motor can drive the driving wheel 302 to rotate, the driving wheel 302 can drive the conveying belt 303 to move, the conveying belt 303 can drive the rock 400 to move through the fixing seat 301, and the conveying mechanism 300 is arranged in this way, and is simple in structure and convenient to convey. Moreover, as can be seen from the above formula, the rotation speed of the driving wheel 302 can be known by knowing the rotation speed of the motor, so that the collision speed of the rock 400 and the cutter 201 during mutual collision can be known, and the device for measuring the collision speed does not need to be additionally arranged, so that the structure is simpler, and the use is more convenient. The conveying mechanism 300 may have other structures, for example, the conveyor belt 303 may be replaced by a conveyor chain.
In some embodiments of the present invention, as shown in fig. 2 to 4, the sidewall of the fixing base 301 is provided with a threaded hole 305, and the threaded hole 305 is screwed with a locking bolt 306, and the locking bolt 306 is used to abut the rock 400. After the rock 400 is placed in the fixing cavity 304, the locking bolt 306 is screwed into the threaded hole 305, and then the locking bolt 306 is screwed, so that the locking bolt 306 abuts against the outer surface of the rock 400, and the rock 400 can be locked by the locking bolt 306, so that the rock 400 can be prevented from being randomly moved out of the fixing cavity 304.
In some embodiments of the present invention, as shown in fig. 3 and fig. 4, one end of the bearing portion 307 away from the pick-and-place opening is provided with two inclined planes 308, the two inclined planes 308 are arranged along a set direction, the set direction is perpendicular to the moving direction of the bearing portion 307, the two inclined planes 308 extend obliquely towards the direction close to the pick-and-place opening in the direction away from each other, one end of the fixing cavity 304 away from the pick-and-place opening is slidably provided with two adjusting blocks 309 along the set direction, the adjusting blocks 309 are in one-to-one correspondence with the inclined planes 308, the end surfaces of the adjusting blocks 309 close to the pick-and-place opening are parallel and are attached to the corresponding inclined planes 308, the fixing seat 301 is rotatably provided with an adjusting screw 310 extending along the set direction, the adjusting screw 310 is provided with two external threads 311 with opposite rotation directions, and the two external threads 311 are respectively connected with the two adjusting blocks 309 in a threaded manner. Because two sections of external threads 311 of the adjusting screw 310 are respectively in threaded connection with two adjusting blocks 309, and the two sections of external threads 311 are in opposite rotation directions, and then the adjusting screw 310 is rotated, the adjusting screw 310 can control the two adjusting blocks 309 to be close to or far away from each other in the set direction, because the two inclined planes 308 extend obliquely towards the direction close to the picking and placing port in the direction far away from each other, when the two adjusting blocks 309 are close to each other, the bearing part 307 can be pushed to move towards the direction close to the picking and placing port, and when the two adjusting blocks 309 are far away from each other, the bearing part 307 can be moved towards the direction far away from the picking and placing port, so that the adjusting screw is convenient to operate and ingenious in design. In addition, the two adjusting blocks 309 are abutted against the bearing portion 307, and the end faces of the adjusting blocks 309 close to the picking and placing ports are parallel and attached to the corresponding inclined faces 308, so that the bearing portion 307 is supported more firmly, and rollover of the bearing portion 307 is avoided.
It should be noted that, the inner side wall of the fixing cavity 304 may be provided with a first sliding rail, and the bearing portion 307 may be slidably mounted on the first sliding rail, so that the bearing portion 307 moves more smoothly, and rollover of the bearing portion 307 can be further avoided. The end of the fixed cavity 304 away from the pick-and-place opening may be provided with a second sliding rail or sliding slot along a set direction, and the adjusting block 309 may be slidably mounted on the second sliding rail or sliding slot. The adjusting screw 310 may be manually rotated or may be driven by a motor. In addition, the carrying portion 307 may also control movement in other manners, for example, a driving oil cylinder may be disposed at an end of the fixing cavity 304 away from the pick-and-place port, the carrying portion 307 is connected to the driving oil cylinder, the driving oil cylinder is started, and the driving oil cylinder can also control movement of the carrying portion 307.
According to the method for testing the impact resistance and the fatigue life of the shield machine cutter, which is provided by the embodiment of the invention, the method comprises the following steps of:
s100, placing the rock 400 in a fixed cavity 304 of a fixed seat 301, mounting a cutter 201 on a cutter holder 200, and lifting the cutter holder 200 so that the cutter 201 is positioned on a moving path of the rock 400;
s200, starting a conveying mechanism 300, wherein the conveying mechanism 300 drives a rock 400 to sequentially strike a cutter 201, a force sensor is used for recording an impact load value when the cutter 201 collides with the rock 400, and meanwhile, the damage condition of the cutter 201 is observed and recorded;
wherein S200 comprises at least one of the following steps:
s201, lifting and adjusting the cutter holder 200 to enable the cutter 201 to collide with different height positions of the rock 400;
s202, adjusting the conveying speed of the conveying mechanism 300 so that the cutter 201 and the rock 400 have different collision speeds;
s300, analyzing the recorded impact load value and the damage condition of the cutter 201 to obtain the impact resistance and the fatigue life of the cutter 201.
The method for testing the impact resistance and the fatigue life of the cutter of the shield machine is convenient to operate, in addition, in the detection process, the cutter holder 200 can be lifted and adjusted to enable the cutter 201 to collide with different height positions of the rock 400, so that the impact resistance and the fatigue life of the cutter 201 under different penetration degrees can be detected, and the conveying speed of the conveying mechanism 300 can be adjusted to enable the cutter 201 and the rock 400 to have different collision speeds, so that the impact resistance and the fatigue life of the cutter 201 and the rock 400 when the collision speeds are different can be detected. Namely, the shock resistance and the fatigue life of the cutter 201 of the shield machine under different working conditions can be detected, the practicability is good, guidance can be provided for the optimal design of the cutter 201, and the method is suitable for popularization and use.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a shield constructs shock resistance and fatigue life testing arrangement of quick-witted cutter which characterized in that includes:
a frame;
the cutter holder can be installed on the rack in a lifting manner, a cutter is installed on the cutter holder, and a force sensor is arranged between the cutter holder and the cutter;
the conveying mechanism is provided with a plurality of fixing seats along the conveying direction, the fixing seats are provided with fixing cavities for placing rocks, one ends of the fixing cavities, which are away from the conveying mechanism, are provided with taking and placing openings, bearing parts are arranged in the fixing cavities and can be moved and adjusted along the directions which are close to or far from the taking and placing openings, and the bearing parts are used for bearing the rocks;
wherein the conveying mechanism is used for driving the rock to strike the cutter;
the bearing part is far away from one end of the picking and placing port is provided with two inclined planes, the two inclined planes are distributed along a set direction, the set direction is perpendicular to the moving direction of the bearing part, the two inclined planes are inclined and extend towards the direction close to the picking and placing port in the direction away from each other, the fixed cavity is far away from one end of the picking and placing port is arranged along the set direction in a sliding mode, two adjusting blocks are in one-to-one correspondence with the inclined planes, the adjusting blocks are close to the end faces of the picking and placing port, the end faces of the adjusting blocks are parallel and are attached to the corresponding inclined planes, the fixing seat is rotated and provided with an adjusting screw rod extending along the set direction, the adjusting screw rod is provided with two sections of external threads which are opposite in rotation direction, and the two sections of external threads are connected with the two adjusting blocks in a threaded mode respectively.
2. The device for testing the shock resistance and the fatigue life of the cutter of the shield machine according to claim 1, wherein the frame is vertically provided with a lifting oil cylinder, the cutter holder is arranged on the lifting oil cylinder, a guide mechanism is arranged between the cutter holder and the frame, and the guide mechanism is used for enabling the cutter holder to move vertically.
3. The device for testing the shock resistance and the fatigue life of the cutter of the shield machine according to claim 2, wherein the guide mechanism comprises a plurality of guide rods vertically arranged on the frame, and the cutter holder is provided with a plurality of guide holes and sleeved with the guide rods through the guide holes.
4. The device for testing the impact resistance and the fatigue life of the cutter of the shield machine according to any one of claims 1 to 3, wherein the frame is provided with a sliding table in a sliding manner along a first horizontal direction, the sliding table is provided with a mounting frame in a sliding manner along a second horizontal direction perpendicular to the first horizontal direction, and the conveying mechanism is arranged on the mounting frame.
5. A device for testing the impact resistance and fatigue life of a cutter of a shield machine according to any one of claims 1 to 3, wherein the conveying mechanism comprises:
the two driving wheels are arranged on the frame;
the conveying belt is arranged between the two driving wheels, and the fixing seat is arranged on the conveying belt;
the collision speed when the rock collides with the cutter is expressed as:
wherein R is the radius of the driving wheel, and n is the rotating speed of the driving wheel.
6. The device for testing the shock resistance and the fatigue life of the cutter of the shield machine according to any one of claims 1 to 3, wherein a threaded hole is formed in the side wall of the fixing seat, and the threaded hole is in threaded connection with a locking bolt, and the locking bolt is used for abutting against the rock.
7. A device for testing the impact resistance and fatigue life of a cutter of a shield machine according to any one of claims 1 to 3, wherein the force sensor is configured as a three-way force sensor.
8. The method for testing the impact resistance and the fatigue life of the cutter of the shield machine is based on the device for testing the impact resistance and the fatigue life of the cutter of the shield machine according to any one of claims 1 to 7, and is characterized by comprising the following steps:
s100, placing rock in a fixed cavity of a fixed seat, mounting a cutter on a cutter holder, and lifting the cutter holder so that the cutter is positioned on a moving path of the rock;
s200, starting a conveying mechanism, wherein the conveying mechanism drives the rock to sequentially strike the cutters, and recording impact load values when the cutters collide with the rock through a force sensor and observing and recording damage conditions of the cutters;
wherein step S200 includes at least one of the following steps:
s201, lifting and adjusting the cutter holder so that the cutter collides with different height positions of the rock;
s202, adjusting the conveying speed of the conveying mechanism so that the cutter and the rock have different collision speeds;
s300, analyzing the recorded impact load value and the damage condition of the cutter to obtain the impact resistance and the fatigue life of the cutter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310005469.3A CN115824554B (en) | 2023-01-04 | 2023-01-04 | Device and method for testing impact resistance and fatigue life of cutter of shield tunneling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310005469.3A CN115824554B (en) | 2023-01-04 | 2023-01-04 | Device and method for testing impact resistance and fatigue life of cutter of shield tunneling machine |
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| CN115824554A CN115824554A (en) | 2023-03-21 |
| CN115824554B true CN115824554B (en) | 2023-05-09 |
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| CN103969141B (en) * | 2013-01-29 | 2016-08-03 | 中南大学 | A kind of hard rock hob breaks rock characteristic test device |
| CN103424326B (en) * | 2013-08-07 | 2015-05-06 | 中国矿业大学 | Coal rock cutting test device and cutting tool test method |
| CN207066883U (en) * | 2017-06-21 | 2018-03-02 | 中国矿业大学(北京) | A kind of confined pressure loading device of rock physicses Experiments of Machanics strength test |
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