Device and method for detecting wear resistance of anchor rod drill bit for coal mine

Abstract

The invention discloses a device and method for detecting the wear resistance of an anchor rod drill bit for a coal mine, and belongs to the technical field of anchor rod drill bits. The device comprises a main machine base, a workbench is fixed to the main machine base, a grinding mechanism is arranged on the workbench, and a dust suction device is arranged on the right side of the main machine base; a protective cover is arranged on the upper portion of the main machine base, an electric control system is arranged on the left side of the main machine base, the grinding mechanism comprises a grinding wheel spindle swing mechanism and a servo swing mechanism, and a constant feeding force pressurizing mechanism is fixed to the servo swing mechanism. The linear speed of a grinding point is constant, the constant feeding force loading mechanism achieves constant-pressure feeding grinding in a constant-feeding-force pressurizing propelling mode of a pneumatic sliding table, and the problem that the feeding amount of a tested anchor rod drill bit is not easy to control is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor drill bits, in particular to a coal mine anchor drill bit wear resistance detection device and detection method. BACKGROUND

[0002] The coal mine anchor drill bit is the final execution end of the drilling operation of the drilling machine, bears complex load during operation, and the wear resistance thereof is directly related to the efficiency and economy of the underground work of the coal mine, and the test bench in the industry is relatively simple at present, the linear speed of the grinding contact point in the grinding process of the grinding wheel is reduced with the continuous reduction of the diameter of the grinding wheel, the feeding amount is not easy to control during the loading process, and the like, and the test bench cannot well meet the requirements of the relevant test standards. SUMMARY

[0003] To solve the problems in the prior art, the present application provides a coal mine anchor drill bit wear resistance detection device and detection method, which achieves the technical effects of constant linear speed of the grinding contact point of the grinding wheel, constant pressure feeding grinding during the loading process, and the like, and effectively meets the requirements of the test standards.

[0004] The present application adopts the following technical solutions.

[0005] The present application provides a coal mine anchor drill bit wear resistance detection device in the first aspect, which comprises a main machine base.

[0006] A workbench is fixed on the main machine base, a grinding mechanism is arranged on the workbench and used for grinding the measured piece, a dust collection device is arranged on the right side of the main machine base and used for dust collection during grinding, a protective cover is arranged on the upper portion of the main machine base, and an electric control system is arranged on the left side of the main machine base and used for setting the test condition parameters, monitoring the test state, and controlling the whole test device.

[0007] The grinding mechanism comprises a grinding wheel main shaft rotating mechanism and a servo swing mechanism, the grinding wheel main shaft rotating mechanism keeps the linear speed of the grinding point constant through speed control, and the servo swing mechanism is used for realizing the reciprocating friction between the test sample and the grinding wheel, a constant feeding force pressurizing mechanism is fixed on the servo swing mechanism and used for constant pressure feeding grinding, and the like, so as to meet the requirements of the test standards.

[0008] Preferably, the grinding wheel main shaft rotating mechanism comprises a main shaft support frame installed on the workbench, a rotating main shaft is fixed on the main shaft support frame, and a standard grinding wheel is installed on one end of the rotating main shaft through an inner fastening sleeve, an outer fastening sleeve, and a fixing nut.

[0009] Preferably, an angle encoder and an encoder mounting seat are penetrated through the rotating main shaft, and the angle encoder is fixed on the workbench through the angle encoder mounting seat.

[0010] Preferably, the grinding wheel spindle rotation mechanism is provided with a variable frequency motor, a large pulley is fixed on the variable frequency motor, a small pulley is installed on the rotating spindle, a tension belt is installed on the large pulley and the small pulley, and the large pulley drives the rotating spindle to rotate through the tension belt.

[0011] Preferably, the servo swing mechanism comprises a mounting base plate mounted on the workbench, a screw linear guide platform fixedly mounted on the mounting base plate, a stepper motor fixedly mounted at one end of the screw linear guide platform, and a pneumatic slide platform mounting plate slidably connected inside the screw linear guide platform.

[0012] Preferably, the constant feed force pressurizing mechanism comprises a pneumatic slide platform, a left stand column and a right stand column, and a high-precision displacement sensor fixed between the left stand column and the right stand column.

[0013] Preferably, the up-down adjusting mechanism comprises a guide rail back plate fixed on the pneumatic slide platform, an upper stand column and a lower stand column fixed to the top and the bottom of the guide rail back plate, respectively, and a left guide rod, a right guide rod and a guide rail screw fixed between the upper stand column and the lower stand column, wherein the left guide rod, the right guide rod and the guide rail screw pass through a guide rail slider, the guide rail screw is provided with a thread, and a hand wheel is installed above the guide rail screw.

[0014] Preferably, the measured piece fixing mechanism comprises a fixing plate fixed on the guide rail slider, an angle adjusting mechanism rotatably mounted on the fixing plate, a clamping device threadedly mounted on the angle adjusting mechanism, and a measured anchor rod drill bit clamped on the device, wherein a position detection plate is mounted on the back of the fixing plate, and the high-precision displacement sensor is in contact with the position detection plate.

[0015] The second aspect of the present application provides a coal mine anchor rod drill bit wear resistance detection method, which executes the coal mine anchor rod drill bit wear resistance detection device as described in the first aspect.

[0016] The method comprises the following steps:

[0017] The grinding wheel spindle rotation mechanism is started: after the detection device starts, the dust collection device starts to operate, the grinding wheel spindle rotation mechanism starts to work and run, and the electric control system controls the rotation speed of the grinding wheel spindle rotation mechanism in a closed loop.

[0018] The servo swing mechanism is started: the servo swing mechanism is started, reciprocally swings towards the grinding wheel spindle rotation mechanism according to the spindle direction of the servo swing mechanism, and realizes repeated grinding of the measured piece on the grinding wheel spindle rotation mechanism.

[0019] The constant feed force pressurizing mechanism is started: the constant feed force pressurizing mechanism is started, drives the measured piece to feed to the grinding wheel spindle rotation mechanism at a constant force, realizes constant pressure grinding, and is used for performance detection.

[0020] Compared with the prior art, the present application has at least the following advantages:

[0021] 1. The high-precision displacement sensor detects the diameter of the standard grinding wheel in real time, the angle encoder detects the rotation speed of the grinding wheel spindle in real time, and the electric control system adjusts the rotation speed of the rotary spindle through closed-loop control of the rotation speed of the frequency conversion motor, so as to realize constant point line speed of grinding and meet the requirements of the test standard.

[0022] 2. The constant feed force loading mechanism realizes constant pressure feed grinding through the constant feed force pressing propulsion of the pneumatic sliding table, effectively solves the problem that the feed amount is not easy to control, and meets the requirements of the test standard.

[0023] 3. The servo swing mechanism realizes the reciprocating friction between the test sample and the grinding wheel through the servo motor driving the screw linear guide platform and the limit switch, and meets the requirements of the test standard. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 is a schematic diagram of the grinding mechanism of the present application;

[0026] Figure 3 is a schematic diagram of the grinding wheel spindle rotation mechanism of the present application;

[0027] Figure 4 is a schematic diagram of the servo swing mechanism of the present application;

[0028] Figure 5 is a schematic diagram of the constant feed force pressing mechanism of the present application;

[0029] Figure 6 is a schematic diagram of the up-down adjustment mechanism of the present application;

[0030] Figure 7 is a schematic diagram of the measured part fixing mechanism of the present application;

[0031] In the figure: 1, main base; 2, workbench; 3, grinding mechanism; 31, grinding wheel spindle rotation mechanism; 311, spindle support frame; 312, rotary spindle; 313, standard grinding wheel; 314, inner fastening sleeve; 315, outer fastening sleeve; 316, fixed nut; 317, angle encoder; 318, angle encoder mounting seat; 319, loaded variable frequency motor; 3110, large pulley; 3111, tension belt; 3112, small pulley; 32, servo swing mechanism; 321, mounting bottom plate; 322, stepper motor; 323, screw linear guide rail platform; 324, pneumatic slide mounting plate; 325, proximity switch sensing seat; 326, proximity switch fixed seat; 33, constant feed force pressing mechanism; 331, pneumatic slide; 332, left stand column; 333, right stand column; 334, high-precision displacement sensor; 34, up and down adjusting mechanism; 341, guide rail back plate; 342, upper stand block; 343, lower stand block; 344, left guide rod; 345, right guide rod; 346, guide rail screw; 347, guide rail slider; 348, hand wheel; 35, measured piece fixing mechanism; 351, fixed plate; 352, angle adjusting mechanism; 353, clamping device; 354, measured anchor rod drill bit; 355, position detection plate; 4, dust collection device; 5, protective cover; 6, electric control system. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The embodiments described in the present application are only a part of the embodiments of the present application, but not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor on the basis of the spirit of the present application shall fall within the protection scope of the present application.

[0033] As Figure 1 shown, embodiment 1 of the present application discloses a coal mine anchor rod drill bit wear resistance detection device, which comprises a main base 1, a workbench 2 is fixed on the main base 1, a grinding mechanism 3 is arranged on the workbench 2, which is used for grinding the measured piece, a dust collection device 4 is arranged on the right side of the main base 1, which is used for dust collection during grinding, a protective cover 5 is arranged on the upper part of the main base 1, and an electric control system 6 is arranged on the left side of the main base 1, which is used for setting test condition parameters, monitoring test state and controlling the whole test device.

[0034] As Figure 2As shown, the grinding mechanism 3 includes a grinding wheel spindle rotation mechanism 31, a servo swing mechanism 32, the grinding wheel spindle rotation mechanism 31 keeps the grinding point linear speed constant through speed control, the servo swing mechanism 32 is used to realize the reciprocating friction between the test sample and the grinding wheel, a constant feed force pressing mechanism 33 is fixed on the servo swing mechanism 32, which is used for constant pressure feed grinding to meet the test standard requirements, an up-down adjusting mechanism 34 is fixed on the constant feed force pressing mechanism 33, and a measured piece fixing mechanism 35 is fixed on the up-down adjusting mechanism 34.

[0035] As shown in the figure, Figure 3 The grinding wheel spindle rotation mechanism 31 includes a spindle support frame 311 installed on the workbench 2, a rotation spindle 312 fixed on the spindle support frame 311, a standard grinding wheel 313 installed on the rotation spindle 312 through an inner fastening sleeve 314, an outer fastening sleeve 315 and a fixing nut 316. An angle encoder 317 passes through the rotation spindle 312 and is fixed on the workbench 2 through an angle encoder mounting seat 318. A variable frequency motor 319 is installed on the main body structure, a large pulley 3110 is fixed on the variable frequency motor 319, and a small pulley 3112 is installed on the rotation spindle 312 through a tension belt 3111 and a small pulley 3112, which drives the rotation spindle 312 to rotate.

[0036] As shown in the figure, Figure 4 The servo swing mechanism 32 includes a mounting base plate 321 installed on the workbench 2, a screw linear guide platform 323 fixed to the mounting base plate 321, a step motor 322 fixed at one end of the screw linear guide platform 323, a pneumatic slide mounting plate 324 installed on the screw inside 323, the step motor 322 drives the screw inside the screw linear guide platform 323 to rotate, which drives the 324 to make axial swing, the step motor 322 drives the screw linear guide platform 323 to make swing movement along the spindle axis, and the pneumatic slide mounting plate 324 is provided with a proximity switch sensing seat 325 below, and a proximity switch fixed seat 326 is installed on the workbench 2.

[0037] As shown in the figure, Figure 5 The constant feed force pressing mechanism 33 includes a pneumatic slide 331, a left column 332, a right column 333, and a high-precision displacement sensor 334 fixed between the left column 332 and the right column 333, which is used for real-time detection of the diameter of the standard grinding wheel 313.

[0038] As shown in the figure, Figure 6As shown, the up and down adjusting mechanism 34 includes a guide rail back plate 341 fixed on the pneumatic slide 331, an upper vertical block 342 and a lower vertical block 343 are fixed on the top and bottom of the guide rail back plate 341 respectively, a left guide rod 344, a right guide rod 345 and a guide rail screw 346 are fixed between the upper vertical block 342 and the lower vertical block 343, the guide rail screw 346 is provided with a thread, a guide rail sliding block 347 is matched with the guide rail screw 346, and a hand wheel 348 is installed above the guide rail screw 346 for adjusting the height of the measured part fixing mechanism 35.

[0039] As shown, Figure 7 The measured part fixing mechanism 35 includes a fixed plate 351 fixed on the guide rail sliding block 347, an angle adjusting mechanism 352 rotatably installed on the fixed plate 351, a clamping device 353 threadedly installed on the angle adjusting mechanism 352, and a measured anchor rod drill bit 354 clamped on the clamping device 353, and a position detection plate 355 is installed on the back of the fixed plate 351 and matched with the high-precision displacement sensor 334, and the high-precision displacement sensor 334 is in contact with the position detection plate 355.

[0040] Embodiment 2 of the present application discloses a coal mine anchor rod drill bit wear resistance detection method:

[0041] (1) Measured part installation: the measured anchor rod drill bit 354 is installed and fixed on the clamping device 353, the hand wheel 348 is driven to drive the guide rail screw 346 to drive the guide rail sliding block 347 to adjust the height of the measured part fixing mechanism 35, and the angle adjusting mechanism 352 is adjusted to adjust the installation angle of the measured anchor rod drill bit 354.

[0042] (2) Start of the grinding wheel spindle rotary mechanism: after the detection device is started, the dust collection device 4 operates, the grinding wheel spindle rotary mechanism 31 works and operates, and the electric control system 6 controls the speed of the grinding wheel spindle rotary mechanism 31 in a closed loop;

[0043] In the preferred but non-limiting embodiment of the present application, the starting of the grinding wheel spindle rotary mechanism 31 specifically includes: after the detection device is started, the dust collection device 4 starts to operate, the variable frequency motor 319 is started, the variable frequency motor 319 drives the large belt pulley 3110 to rotate, the rotation of the rotary main shaft 312 is driven through the tension belt 3111 and the small belt pulley 3112, the standard grinding wheel 313 is fixed on the rotary main shaft 312 to rotate synchronously through the inner fastening sleeve 314, the outer fastening sleeve 315 and the fixing nut 316, the angle encoder 317 monitors the speed of the rotary main shaft 312 in real time, and the electric control system 6 controls the speed of the rotary main shaft 312 in a closed loop through the variable frequency motor 319.

[0044] (3) Start of the servo swing mechanism: the servo swing mechanism 32 is started, and swings back and forth according to the direction of the main shaft of the servo swing mechanism 32 towards the grinding wheel spindle rotary mechanism 31, and the measured part is repeatedly ground on the grinding wheel spindle rotary mechanism 31;

[0045] In the preferred but non-limiting embodiment of the application, the servo swing mechanism 32 is activated and specifically includes: the step motor 322 is activated to drive the linear guide platform 323 to swing along the spindle axis, when the proximity switch sensing seat 325 moves forward to approach the proximity switch fixed seat 326, the step motor 322 drives the linear guide platform 323 to move backward in reverse, when the proximity switch sensing seat 325 moves backward to approach the proximity switch fixed seat 326, the step motor 322 drives the linear guide platform 323 to move forward in reverse, and the reciprocating operation realizes reciprocating swing.

[0046] (4) Constant feed force pressurizing mechanism activation: the constant feed force pressurizing mechanism 33 is activated to drive the measured part to the grinding wheel spindle rotation mechanism 31 with constant force feed, and constant pressure grinding is performed for performance detection.

[0047] In the preferred but non-limiting embodiment of the application, the constant feed force pressurizing mechanism 33 is activated and specifically includes: the pneumatic sliding table 331 is used to push the up-down adjusting mechanism 34 and the measured part fixing mechanism 35 with constant feed force, so that the measured anchor rod drill bit 354 is attached to the surface of the standard grinding wheel 313 with a certain pressure for wear resistance performance detection grinding test. During the grinding process, the position detection plate 355 moves with the measured part fixing mechanism 35, and the high-precision displacement sensor 334 identifies the position of the position detection plate 355 in real time, so as to realize real-time detection of the diameter of the standard grinding wheel 313.

[0048] Compared with the prior art, the application has at least the following beneficial effects:

[0049] 1. The high-precision displacement sensor detects the diameter of the standard grinding wheel in real time, the angle encoder detects the rotation speed of the grinding wheel spindle in real time, and the electric control system adjusts the rotation speed of the rotation spindle through closed-loop control of the rotation speed of the frequency conversion motor, so as to realize constant linear velocity of the grinding point, and meet the requirements of the test standard.

[0050] 2. The constant feed force loading mechanism realizes constant pressure feed grinding through the constant feed force pressurizing pushing mode of the pneumatic sliding table, effectively solves the problem that the feed amount is not easy to control, and meets the requirements of the test standard.

[0051] 3. The servo swing mechanism realizes reciprocating friction between the test sample and the grinding wheel through the servo motor driving linear guide platform and limit switch, and meets the requirements of the test standard.

[0052] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit it, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A coal mine anchor rod drill bit wear resistance detection device, comprising a main machine base (1), characterized in that: a workbench (2) is fixed on the main machine base (1), a grinding mechanism (3) is arranged on the workbench (2) for grinding the measured piece, a dust collection device (4) is arranged on the right side of the main machine base (1) for dust collection during grinding, a protective cover (5) is arranged on the upper part of the main machine base (1), and an electric control system (6) is arranged on the left side of the main machine base (1) for setting test condition parameters, monitoring test state and overall control of the test device; the grinding mechanism (3) comprises a grinding wheel spindle rotation mechanism (31) and a servo swing mechanism (32), the grinding wheel spindle rotation mechanism (31) keeps the linear speed of the grinding point constant through speed control, and the servo swing mechanism (32) is used for realizing reciprocating friction between the test sample and the grinding wheel; a constant feed force pressing mechanism (33) is fixed on the servo swing mechanism (32) for constant pressure feed grinding to meet the requirements of test standards.

2. The coal mine anchor rod drill bit wear resistance detection device according to claim 1, characterized in that: a constant feed force pressing mechanism (33) is fixed on the servo swing mechanism (32), and an up-down adjusting mechanism (34) is fixed on the constant feed force pressing mechanism (33).

3. The coal mine anchor rod drill bit wear resistance detection device according to claim 1, characterized in that: the grinding wheel spindle rotation mechanism (31) comprises a spindle support frame (311) installed on the workbench (2), a rotating spindle (312) is fixed on the spindle support frame (311), and a standard grinding wheel (313) is installed on one end of the rotating spindle (312) through an inner fastening sleeve (314), an outer fastening sleeve (315) and a fixing nut (316).

4. The coal mine anchor rod drill bit wear resistance detection device according to claim 3, characterized in that: an angle encoder (317) and an encoder mounting seat (318) are penetrated on the rotating spindle (312), and the angle encoder (317) is fixed on the workbench (2) through the angle encoder mounting seat (318).

5. The coal mine anchor rod drill bit wear resistance detection device according to claim 1, characterized in that: a variable frequency motor (319) is installed on the grinding wheel spindle rotation mechanism (31), a large pulley (3110) is fixed on the variable frequency motor (319), a small pulley (3112) is installed on the rotating spindle (312), a tension belt (3111) is installed on the large pulley (3110) and the small pulley (3112), and the large pulley (3110) drives the rotating spindle (312) to rotate through the tension belt (3111) and the small pulley (3112).

6. The coal mine anchor rod drill bit wear resistance detection device according to claim 1, characterized in that: The servo swing mechanism (32) includes a mounting bottom plate (321) mounted on the workbench (2), a screw linear guide rail platform (323) fixedly mounted on the mounting bottom plate (321), one end of the screw linear guide rail platform (323) fixedly connected with a stepping motor (322), and a pneumatic sliding table mounting plate (324) slidably connected in the screw linear guide rail platform (323).

7. The coal mine anchor rod drill bit wear resistance detection device according to claim 1, wherein: The constant feed force pressing mechanism (33) comprises a pneumatic sliding table (331), a left stand column (332) and a right stand column (333), and a high-precision displacement sensor (334) is fixed between the left stand column (332) and the right stand column (333).

8. The coal mine anchor rod drill bit wear resistance detection device according to claim 2, wherein: The up-down adjusting mechanism (34) comprises a guide rail back plate (341) fixed on the pneumatic sliding table (331), an upper stand block (342) and a lower stand block (343) fixed to the top and the bottom of the guide rail back plate (341), respectively, and a left guide rod (344), a right guide rod (345) and a guide rail screw (346) fixed between the upper stand block (342) and the lower stand block (343).

9. The coal mine anchor rod drill bit wear resistance detection device according to claim 2, wherein: The measured piece fixing mechanism (35) comprises a fixing plate (351) fixed on the guide rail sliding block (347), an angle adjusting mechanism (352) rotatably mounted on the fixing plate (351), a clamping device (353) threadedly mounted on the angle adjusting mechanism (352), and a measured anchor rod drill bit (354) clamped on the clamping device (353).

10. A coal mine anchor rod drill bit wear resistance detection method, which comprises a coal mine anchor rod drill bit wear resistance detection device according to any one of claims 1-9, and wherein: The following steps are included: The sand wheel spindle rotation mechanism is started: after the detection device is started, the dust collection device (4) is operated, the sand wheel spindle rotation mechanism (31) is operated, and the electric control system (6) controls the rotation speed of the sand wheel spindle rotation mechanism (31) in a closed loop; The servo swing mechanism is started: the servo swing mechanism (32) is started, the measured piece is repeatedly ground in the sand wheel spindle rotation mechanism (31) according to the reciprocating swing direction of the servo swing mechanism (32) towards the sand wheel spindle rotation mechanism (31). Constant feed force pressure mechanism start: constant feed force pressure mechanism (33) start, drive the measured member to the grinding wheel spindle rotation mechanism (31) constant force feed, constant pressure grinding, for performance testing.

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