CN210834534U - A new type of hob cutter ring rotary cutting wear test device - Google Patents

Abstract

The utility model discloses a novel rotary cutting wear test device of a hob cutter ring. In the test device, the telescopic oil cylinder is connected to the three-dimensional frame, and the lower part of the telescopic oil cylinder is sequentially connected with a beam, a connecting plate, a three-way force sensor and a tool rest. The vertical nozzle guide rail is connected to the bottom of the frame, and the vertical nozzle guide rail is connected with the horizontal nozzle guide rail, nozzle bracket and nozzle in turn. The sample is placed in the silo box, the bottom of the silo box is connected with the hydraulic motor through bolts, and the infrared thermometer is fixedly connected to the outer ring of the support base. The test device can complete the whole process of the cutting and wear test of the cutter ring under water jet assistance and corrosive liquid conditions, and can provide a basis for the prediction of the wear life of the hob cutter ring and the wear resistance design under the conditions of water jet and corrosive liquid. .

Description

A new type of hob cutter ring rotary cutting wear test device

technical field

The utility model relates to the technical field of cutting and wear testing of hob cutters of rock tunnel boring machines, in particular to a rotary cutting and wear test device of a hob cutter ring under the condition of water jet assistance and corrosive liquid.

Background technique

The rock tunnel boring machine (TBM for short) is widely used in tunnel excavation due to its high construction efficiency and strong operation safety. TBM mainly relies on the hob on the cutter head to cut and break the rock, and the rock-breaking performance of the hob directly determines the reliability and stability of the TBM machine. The hob mainly includes key components such as the cutter ring, the cutter hub and the cutter shaft. The hob contacts the rock through the cutter ring. Due to the strong abrasiveness of the rock, it will bring serious wear to the hob cutter ring during the cutting process, and further serious damage. Restricting the service life of the hob and the rock-breaking efficiency, it is very necessary to master the friction and wear characteristics of the hob ring during the cutting process of the hob. my country has a vast territory and complex geological conditions. When the hob cutting rock-breaking stratum involves extremely hard strata (rock compressive strength above 150MPa) or corrosive strata (in seawater, strong acid, strong alkali and other corrosive liquid environments), even some extremely hard strata. When the hard formation is in a corrosive liquid environment, the rock breaking efficiency of the hob ring is low and the wear of the hob ring increases sharply, which brings great difficulties to the prediction of the hob life and the design of wear resistance. In order to solve the engineering problems of extremely hard rock and excessive wear of hob cutter ring in corrosive environment, some new methods of auxiliary hob rock breaking have been gradually proposed. A typical auxiliary hob rock breaking method is the water jet assisted hob rock breaking method. The invention patent applied by China Railway Construction Heavy Industry Group Co., Ltd. (application number: 201710377326.X, 201811311806.7), the names are: a rock breaking roller Knife, shield machine cutter head and shield machine, a kind of roadheader and roadheader cutting mechanism. It is proposed to install a water jet device at the position of the cutter seat of the cutter or in the central area of the cutter head to assist the cutter in rock breaking. The invention patent applied by Dalian University of Technology (application number: CN201310188881.X), titled: Arrangement method and structure of high-pressure water jet in the cutter head of the roadheader, proposes a water jet on the TBM cutter head to assist the hob breaker Rock methods and structures.

The water jet-assisted hob rock breaking method can provide hydraulic pressure to crack the rock when the hob cutter ring cuts the rock, and at the same time can wash the hob cutter ring interface, thereby removing the corrosive abrasive on the hob cutter ring interface and reducing the hob cutter ring. Interface contact temperature, thereby reducing the rock breaking load of the hob ring cutting and the wear of the hob ring. Due to the addition of the water jet, the original hob cutting environment and cutting characteristics have been changed, and the corrosive liquid has a corrosive effect on the hob ring, resulting in a change in the friction and wear characteristics of the hob ring, which makes it different from the traditional hob. The wear characteristics of the cutter ring are different, so it is necessary to study the influence of water jet assistance and corrosive liquid on the friction and wear characteristics of the hob ring. The laboratory test method is the most effective means to obtain the friction and wear characteristics of the above water jet assisted and corrosive liquid on the hob cutter ring. Therefore, a new method is designed that can study the water jet assisted and corrosive liquid on the hob cutter ring cutting extremely hard rock. The test device of friction and wear law is extremely important.

Through the investigation of relevant literature and data, it is found that many units have designed relevant TBM hob wear test devices. The invention patent applied by Central South University (application number: 201310032227.X) is named as: A test device for rock-breaking characteristics of a hard rock hob. The test device involved can carry out a hob wear test, but the device uses an active rotating hob cutter. The friction and wear of the hob is realized by the method of the hob ring, which is different from the passive rotating friction and wear of the real hob ring, and the test device cannot carry out the cutting and wear test of the hob ring under the condition of water jet assistance and corrosive liquid; The invention patent (application number: 201710905705.1) applied by China Railway Tunnel Bureau Group Co., Ltd. is named: Hob Wear Test Experiment Platform and Supporting Measurement and Evaluation Method. The involved wear test device also adopts the way of actively rotating the hob to realize the hob. The friction and wear, and the simulated linear cutting wear of the hob, has a large distortion with the real rotary cutting wear of the hob. At the same time, the test device cannot carry out the hob cutting wear test under the condition of water jet assistance and corrosive liquid; Changsha The invention patent applied by the college (application number: 201811158653.7), titled: a shield tool material wear test bench, developed a hob material wear test device, which cannot carry out water jet assistance and rolling under corrosive liquid conditions The cutting wear test of the cutter ring, and when the hob cutter ring is rubbed against extremely hard rock, due to the excessive cutting load of the hob cutter ring, it is easy to cause the test device to roll over and become unstable. At the same time, the disassembly and installation process of the hob and its accessories under this device is complicated, and the installation position of the hob cannot be adjusted, and the ability to study the friction and wear characteristics of the hob ring is limited.

To sum up, the existing hob wear test device can complete the friction and wear test of the hob cutter ring under normal conditions, but the existing hob wear test device can basically not complete the hob cutter under the condition of water jet assistance and corrosive liquid. Ring cut wear test. At the same time, considering that when the hob cuts extremely hard rock, the cutting load of the hob is larger under the same cutting wear depth, which is easy to cause instability of the rock silo and even the entire test device, so the stability of the wear test device is required to be higher. In addition, the hob has different installation radii on the cutter head, and under the installation radius, it rotates passively around the center of the cutter head to cut the broken rock. Therefore, it is necessary to study the friction and wear characteristics of the hob cutter ring under different installation radii. Aiming at the deficiencies of the existing hob friction and wear test device, the utility model designs the hob under the water jet assisted and corrosive liquid conditions in combination with the actual research requirements of the hob friction and wear under the condition of water jet assistance and corrosive liquid. The cutter ring wear test device can realize the cutting friction and wear test and monitoring of the hob cutter ring under various parameters such as different installation radius, cutting depth, rotation speed around the center of the cutter head, positive pressure, water jet and corrosive liquid.

Utility model content

The purpose of the utility model is to provide a hob cutter ring wear test device under the water jet assisted and corrosive liquid conditions, so as to realize the hob cutter ring cutting extremely hard rock friction and wear test under the water jet assisted and corrosive liquid conditions. Its dynamic monitoring researches the friction and wear characteristics of the hob cutter ring under different parameters, and provides support for the prediction of the hob wear life and the wear resistance design under different parameters.

The utility model is mainly realized through the following schemes. The utility model mainly includes a telescopic oil cylinder, a three-dimensional frame, a three-way force sensor, a reduced size knife ring, an infrared thermometer, an outer ring of a support base, an extremely hard rock sample, a wear-resistant roller Sub, support base chassis, liquid conduit, hydraulic motor, silo box, frame support ribs, beams, beam support ribs, bearing right end cover, knife shaft, fastening nut, lateral sprinkler guide, sprinkler bracket, sprinkler, water jet guide , Vertical nozzle guide rail, bearing left end cover, bearing, tool rest, tool rest support ribs, connecting plate.

The telescopic oil cylinder is fixed at the middle position of the three-dimensional frame, the right-angle turn of the three-dimensional support is reinforced with frame support ribs, and the lower end of the three-dimensional support is fastened on the ground; the telescopic oil cylinder is connected to the ground through its piston rod. The beam is connected, two beam support ribs are symmetrically arranged on the beam about its middle position, the beam is connected with the connecting plate through bolts, and the connecting plate is connected with the connecting plate through the three-way force sensor. The tool rest is connected, and the beam has a dovetail groove structure inside, and the tool rest can slide along the dovetail groove along with the connecting plate to achieve different installation radii, and is finally locked and positioned by bolts.

The tool holder support ribs are arranged on both sides of the tool holder, a pair of the bearings are installed in the tool holder, and the left and right end caps of the bearing are connected to the left and right sides of the tool holder for positioning. The outer ring of the bearing, a sealing ring is arranged between the right end cover of the bearing and the knife shaft; the inner ring of the bearing is connected with the knife shaft by interference, and the knife shaft passes through the key and the reduced size knife ring Through the tightening nut screwed on the knife shaft, the reduced size knife ring can rotate together with the knife shaft and the bearing inner ring; the bearing outer ring is connected with the inside of the knife holder by interference; so The three-direction force sensor, the tool holder, the tool shaft, the reduced-sized tool ring and the tightening nut are symmetrically distributed on the beam with respect to the telescopic oil cylinder, and the required reduced-sized tool ring is in contact with the extremely hard rock sample .

The vertical nozzle guide rail is connected directly below the tool holder, and the horizontal nozzle guide rail can move up and down on the vertical nozzle guide rail, and is finally fastened and positioned by bolts; the horizontal nozzle guide rail has a dovetail groove structure, so The spray head support can move left and right on the lateral spray head guide rail, and is finally fastened and positioned by bolts; the spray head is connected to the spray head support, and the spray head can swing at any angle on the spray head support, and Finally, it is fastened and positioned by bolts, and the spray heads of different structural forms can be installed on the spray head bracket.

The extremely hard rock sample and the silo box are both circular, and the extremely hard rock sample is placed in the silo box and fastened by four symmetrically distributed bolts. The height of the silo box is higher than that of the extremely hard rock sample, the inner surface of the silo box is coated with an anti-corrosion layer, the bottom of the silo box is connected with the hydraulic motor through bolts, and the hydraulic motor is fixed on the ground; the The bottom of the edge of the silo box is in contact with a plurality of the wear-resistant rollers, and the plurality of the wear-resistant rollers are evenly arranged in the hemispherical grooves of the support base chassis, and the wear-resistant rollers can be concave in the hemispherical surface. Roll freely in the groove, and the support base chassis supports the edge of the silo box through the wear-resistant rollers.

The infrared thermometer is fixedly connected to the outer ring of the support base, and is facing the center of the reduced-size knife ring, so that the overall temperature distribution characteristics of the surface of the reduced-size knife ring can be collected in real time during the test; the support A drain hole is opened at the joint between the outer ring of the base and the chassis of the support base, and the liquid conduit is connected with the drain hole.

The vertical movement of the beam, the tool holder and the reduced-size knife ring is realized by the telescopic movement control of the piston rod of the telescopic oil cylinder, and the telescopic oil cylinder has the function of locking the displacement and maintaining a constant pressure, that is, the down-sizing can be guaranteed. Friction and wear test under constant pressure of cutter ring and constant cutting depth; the circular rotation of the bin box and the extremely hard rock sample is realized by the rotation of the hydraulic motor, which can be adjusted by the flow rate and pressure to realize the hydraulic motor The speed is steplessly adjusted, thereby realizing the stepless speed adjustment of the bin box and the extremely hard rock sample.

The three-way force sensor is used to test the three-way load data of the wear of the reduced-size cutter ring under the condition of water jet assistance and corrosive liquid, and to calculate the corresponding friction coefficient.

Considering that the structure size of the real hob cutter ring is too large, it is inconvenient to carry out indoor wear test research, and the price of the full size cutter ring is too high, so the reduced size cutter ring is used to replace the real hob cutter ring, material and heat treatment The mechanical properties are consistent with the real hob ring.

Compared with the prior art, the utility model can realize the friction and wear test of the reduced size cutter ring cutting extremely hard rock under the condition of water jet assistance and corrosive liquid or under the condition of coupling of the two, and the installation and operation of the reduced size cutter ring during the test process can be realized. The disassembly is very convenient and simple, the installation radius can be continuously adjusted, and the device structure is stable, which can overcome the problems of the device rollover caused by excessive load under extremely hard rock cutting and wear. At the same time, the involved wear test device has a simple operation process, and can directly obtain the cutting wear load, the temperature field of the knife ring, the wear amount and the wear mechanism of the knife ring during the wear process of the knife ring. Therefore, the utility model can be well simulated in engineering. The passive rotating friction and wear characteristics of the real hob cutter ring can provide a basis for the prediction of the wear life of the hob cutter ring and its wear resistance design under the conditions of water jet and corrosive liquid.

Description of drawings

Accompanying drawing 1 is the front structure schematic diagram of the test device involved in the utility model;

Accompanying drawing 2 is the partial dissection top view schematic diagram of extremely hard rock sample, wear-resistant roller, support base chassis;

Accompanying drawing 3 is an enlarged view of the connecting area of parts such as reduced-size knife ring, bearing, knife holder, spray head, etc.;

Accompanying drawing 4 is the dovetail groove structure schematic diagram inside the beam;

Accompanying drawing 5 is the side view of reduced size knife ring;

In the drawings: 1- telescopic oil cylinder, 2- three-dimensional frame, 3- three-way force sensor, 4- reduced size knife ring, 5- infrared thermometer, 6- outer ring of support base, 7- extremely hard rock sample , 8- wear-resistant rollers, 9- support base chassis, 10- liquid conduit, 11- hydraulic motor, 12- silo box, 13- frame support rib, 14- beam, 15- beam support rib, 16- bearing Right end cover, 17- knife shaft, 18- fastening nut, 19- horizontal sprinkler guide, 20- sprinkler bracket, 21- sprinkler, 22- water jet guide, 23- vertical sprinkler guide, 24- bearing left end cap, 25- Bearing, 26-tool holder, 27-tool holder support rib, 28-connecting plate.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the wear test device of the hob cutter ring under water jet assisted and corrosive liquid conditions consists of a telescopic oil cylinder 1, a three-dimensional frame 2, a three-way force sensor 3, and a reduced size cutter ring 4. Infrared thermometer 5, outer ring of support base 6, extremely hard rock sample 7, wear-resistant roller 8, support base chassis 9, liquid conduit 10, hydraulic motor 11, silo box 12, frame support rib 13 , Beam 14, Beam Support Rib 15, Bearing Right End Cover 16, Knife Shaft 17, Fastening Nut 18, Horizontal Sprinkler Rail 19, Sprinkler Bracket 20, Sprinkler 21, Water Jet Conduit 22, Vertical Sprinkler Guide 23, Bearing Left End Cover 24 , Bearing 25, tool holder 26, tool holder support rib 27, connecting plate 28.

The telescopic oil cylinder 1 is fixed at the middle position of the three-dimensional frame 2, and the right-angle turn of the three-dimensional support 2 is reinforced by the frame support ribs 13, which are used to strengthen the overall mechanical strength and rigidity of the three-dimensional support 2, and the lower end of the three-dimensional support 2 is fastened on the ground; The telescopic cylinder 1 is connected to the beam 14 through its piston rod, and two beam support ribs 15 are symmetrically arranged on the beam 14 with respect to the telescopic cylinder 1 to enhance the overall mechanical strength and rigidity of the beam 14; the beam 14 is connected to the connecting plate 28 through bolts Connection, the connecting plate 28 is connected with the tool holder 26 through the three-way force sensor 3, the beam 14 has a dovetail groove structure inside, the tool holder 26 can slide along the dovetail groove along with the connecting plate 28 to achieve different installation radii, and finally locked by bolts Dead positioning, the structure of the dovetail groove is shown in Figure 4.

Tool rest support ribs 27 are arranged on both sides of the tool rest 26, which can improve the overall mechanical strength and rigidity of the tool rest 26; a pair of bearings 25 are installed in the tool rest 26, and the left and right sides of the tool rest 26 are connected with bearing left end caps 24 and The right end cover 16 of the bearing is used to locate the outer ring of the bearing 25. A sealing ring is arranged between the right end cover 16 of the bearing and the knife shaft 17, which is used to block external water or corrosive liquid from entering the bearing 25; the inner ring of the bearing 25 is connected to the knife shaft 17 Interference connection, the cutter shaft 17 is connected with the reduced size cutter ring 4 through the key, and is screwed on the cutter shaft 17 by the tightening nut 18, which is used to fasten the reduced size cutter ring 4. The reduced size cutter ring 4 can be combined with the cutter shaft 17. And the inner ring of the bearing 25 rotates; the outer ring of the bearing 25 is connected with the inside of the tool holder 26 by interference.

Preferably, the diameter of the reduced size cutter ring 4 is about 1/3 of the real hob cutter ring, its diameter is 140mm, the blade width is 5mm, the material and the mechanical properties after heat treatment are consistent with the real hob cutter ring, and the reduced size The side view of the knife ring is shown in Figure 5.

The three-way force sensor 3 , the tool holder 26 , the tool shaft 17 , the reduced size cutter ring 4 and the tightening nut 18 are symmetrically distributed on the beam 14 with respect to the telescopic oil cylinder 1 , and the reduced size cutter ring 4 is in contact with the extremely hard rock sample 7 , and A constant pressure or constant cutting depth can be maintained by the telescopic cylinder 1 .

As shown in FIG. 3 , the vertical nozzle guide rail 23 is connected directly below the tool holder 26, and the horizontal nozzle guide rail 19 can move up and down on the vertical nozzle guide rail 23, and is finally fixed and positioned by bolts; the horizontal nozzle guide rail 19 is provided with a dovetail groove. structure, the sprinkler bracket 20 can move left and right on the lateral sprinkler guide rail 19, and is finally fixed and positioned by bolts; the sprinkler head 21 is connected to the sprinkler head bracket 20, and the sprinkler head 21 can swing on the sprinkler head bracket 20 at any angle, and is finally fixed by the bolts Fastening and positioning, sprinkler heads 21 of different structures can be installed on the sprinkler head bracket 20; The guide rail 19 and the nozzle bracket 20 are controlled and adjusted.

The extremely hard rock sample 7 and the silo box 12 are both circular, and the extremely hard rock sample 7 is placed in the silo box 12 and fastened by four symmetrically distributed bolts. In the specific implementation, each surface of the extremely hard rock sample 7 is smoothed by a grinding machine to ensure the levelness of the surface when it is placed inside the silo box 12, so as to facilitate the smooth friction between the reduced size cutter ring 4 and the extremely hard rock sample 7 Wear; generally, it is preferred to select rocks with a compressive strength of over 150 MPa, a diameter of 500 mm and a height of 100 mm as extremely hard rock samples.

The height of the silo box 12 is higher than that of the extremely hard rock sample 7, generally 50-100 mm higher than the surface of the extremely hard rock sample 7, which is convenient for storing the corrosive liquid on the surface of the extremely hard rock sample 7. The corrosive liquid generally refers to Seawater, strong acid liquid, strong alkali liquid and other liquid media that are corrosive to the hob cutter ring encountered during the construction of TBM; the inner surface of the silo box 12 is coated with an anti-corrosion layer to ensure that the silo box 12 is not corroded The bottom of the silo box 12 is connected with the hydraulic motor 11 through bolts, and the hydraulic motor 11 is fixed on the ground; The wear-resistant rollers 8 are evenly arranged in the hemispherical grooves of the support base chassis 9, and the grooves contain lubricating oil. The support base chassis 9 supports the edge of the silo box 12 through the wear-resistant rollers 8. When the silo When the box 12 is rotated, the wear-resistant roller 8 can roll freely in the hemispherical groove, which can effectively reduce the rotation resistance of the silo box 12, and also prevent the silo from being caused by excessive cutting and wear load of the downsized knife ring 4. The box 12 rolls over and so on.

The infrared thermometer 5 is fixedly connected to the outer ring 6 of the support base, and is facing the center of the reduced-size knife ring 4, so that the overall temperature distribution characteristics of the surface of the reduced-size knife ring 4 can be collected in real time during the test; A drain hole is opened at the joint of the support base chassis 9, and the drain hole is connected with a liquid conduit 10 for draining the water jet liquid or corrosive liquid that overflows during the friction test of the water jet auxiliary reducing knife ring 4.

Through the telescopic movement control of the piston rod of the telescopic oil cylinder 1, the vertical movement of the reduced size cutter ring 4 is realized, and the telescopic oil cylinder 1 has the function of locking the displacement and maintaining a constant pressure, which can ensure that the reduced size cutter ring 4 is suitable for extremely hard rock tests. The constant pressure or constant cutting depth during the wear process of the sample 7; through the drive of the hydraulic motor 11, the uniform rotation of the silo box 12 and the extremely hard rock sample 7 is realized. 11 Maximum rpm at twenty rpm.

The three-way force sensor 3 is used to test the wear of the reduced-size cutter ring 4 under the condition of water jet assistance and corrosive liquid. The three-way load data is calculated, and the ratio of the tangential load and the vertical load can be calculated, and the rate of the cutting and wearing rock of the hob cutter ring can be obtained. friction coefficient.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. For those skilled in the art, modifications to other structural designs of the present invention can be easily realized. Therefore, the invention is not limited to the specific details and illustrations shown herein without departing from the general concept defined by the claims and the scope of equivalents.

Claims (6)

1. The utility model provides a novel hobbing cutter ring gyration cutting wear test device which characterized in that: the device comprises a telescopic oil cylinder (1), a three-dimensional rack (2), a three-way force sensor (3), a reduced-size cutter ring (4), an infrared thermometer (5), a supporting base outer ring (6), a very hard rock sample (7), a wear-resistant roller (8), a supporting base chassis (9), a liquid guide pipe (10), a hydraulic motor (11), a storage bin box (12), a rack support rib (13), a cross beam (14), a cross beam support rib (15), a bearing right end cover (16), a cutter shaft (17), a fastening nut (18), a transverse spray head guide rail (19), a spray head support (20), a spray head (21), a water jet guide pipe (22), a vertical spray head guide rail (23), a bearing left end cover (24), a bearing (25), a cutter rest (26), a cutter rest support rib (27) and a connecting plate (;

the telescopic oil cylinder (1) is fixed in the middle of the three-dimensional rack (2), the right-angle turning part of the three-dimensional support (2) is reinforced by a rack support rib (13), and the lower end of the three-dimensional support (2) is fastened on the ground; the telescopic oil cylinder (1) is connected with a cross beam (14) through a piston rod of the telescopic oil cylinder, two cross beam support ribs (15) are symmetrically arranged on the cross beam (14) relative to the telescopic oil cylinder (1), the cross beam (14) is connected with a connecting plate (28) through a bolt, and the connecting plate (28) is connected with a tool rest (26) through a three-way force sensor (3);

tool rest support ribs (27) are distributed on two sides of the tool rest (26), a pair of bearings (25) are installed in the tool rest (26), a cutter shaft (17) is connected to the inner ring of each bearing (25), a reduced-size cutter ring (4) is installed on each cutter shaft, and the reduced-size cutter ring (4) is in contact with the extremely hard rock sample (7); two sets of size-reducing cutter rings (4), a cutter frame (26) and a three-way force sensor (3) are symmetrically distributed on the cross beam relative to the telescopic oil cylinder;

a vertical spray head guide rail (23) is connected under the tool rest (26), a transverse spray head guide rail (19) is connected on the vertical spray head guide rail (23), a spray head bracket (20) is connected on the transverse spray head guide rail (19), and a spray head (21) is connected on the spray head bracket (20);

the extremely hard rock sample (7) is placed in the bin box (12) and is fastened by four symmetrically distributed bolts; the height of the bin box (12) is higher than that of the extremely hard rock sample (7), and the inner surface of the bin box (12) is coated with an anti-corrosion layer; the bottom of the material bin box (12) is connected with a hydraulic motor (11) through a bolt, and the hydraulic motor (11) is fixed on the ground;

the infrared thermometer (5) is fixedly connected to the outer ring (6) of the supporting base and is opposite to the central position of the reduced-size cutter ring (4); the joint of the outer ring (6) of the supporting base and the chassis (9) of the supporting base is provided with a liquid discharge hole which is connected with a liquid conduit (10).

2. The novel hob ring rotary cutting wear test device according to claim 1, characterized in that: the cross beam (14) is internally provided with a dovetail groove structure, and the tool rest (26) can slide along the dovetail groove along with the connecting plate (28) so as to achieve different installation radiuses and can be locked and positioned by bolts.

3. The novel hob ring rotary cutting wear test device according to claim 1, characterized in that: the left side and the right side of the tool rest (26) are connected with a bearing left end cover (24) and a bearing right end cover (16) which are used for positioning an outer ring of the bearing (25), and sealing rings are distributed between the bearing right end cover (16) and the cutter shaft (17); the inner ring of the bearing (25) is in interference connection with the cutter shaft (17), the cutter shaft (17) is connected with the reduced-size cutter ring (4) through a key and is screwed on the cutter shaft (17) through a fastening nut (18) for fastening the reduced-size cutter ring (4), and the reduced-size cutter ring (4) can rotate together with the cutter shaft (17) and the inner ring of the bearing (25); the outer ring of the bearing (25) is in interference connection with the inside of the tool holder (26).

4. The novel hob ring rotary cutting wear test device according to claim 1, characterized in that: the transverse spray head guide rail (19) can move up and down on the vertical spray head guide rail (23) and can be fastened and positioned by bolts; the transverse spray head guide rail (19) is provided with a dovetail groove structure, and the spray head bracket (20) can move left and right on the transverse spray head guide rail (19) and can be fastened and positioned by bolts; the spray head (21) can swing at any angle on the spray head bracket (20) and can be fastened and positioned by bolts, and the spray head (21) with different structural forms can be arranged on the spray head bracket (20).

5. The novel hob ring rotary cutting wear test device according to claim 1, characterized in that: the bottom of the edge of the bin box (12) is in contact with a plurality of wear-resistant rollers (8), the wear-resistant rollers (8) are uniformly arranged in a hemispherical groove of the supporting base chassis (9), and the supporting base chassis (9) supports the edge of the bin box (12) through the wear-resistant rollers (8).

6. The novel hob ring rotary cutting wear test device according to claim 1, characterized in that: the infrared thermometer (5) is used for monitoring the integral surface temperature characteristic of the reduced-size cutter ring (4) in real time; the telescopic oil cylinder (1) has the functions of locking displacement and keeping constant pressure; the rotating speed of the hydraulic motor (11) can be adjusted in a stepless manner; the three-way force sensor (3) can monitor the cutting wear three-way load data of the reduced-size cutter ring (4) in real time.

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