A diamond composite tooth impact resistance detection device and detection method

Abstract

The present invention discloses a device for detecting the impact resistance of diamond composite teeth, comprising a bracket and an impact ball. The bracket is provided with a clamp, a sleeve and an impactor for repeatedly impacting the impact ball. The sleeve is located above the clamp. The impact ball is movably arranged in the sleeve and an impact window is provided at the bottom of the sleeve for the impact ball to impact the diamond composite teeth. The impact frequency of the impactor is 100-1000 times / minute, and the single impact work of the impactor is: 10-300J. A detection method for a device for detecting the impact resistance of diamond composite teeth comprises the following steps: installing a part to be detected; starting detection; and stopping detection. By impacting the diamond composite teeth with a high frequency of the impactor, the actual use state of the diamond composite teeth is simulated, and the detection error is reduced. The impact resistance of the diamond composite teeth is measured by the product of the single impact work value, the impact frequency and the impact time of the impactor, which can accurately reflect the fatigue impact resistance of the diamond composite teeth and has high reliability.

Description

Technical Field

[0001] The invention relates to mining equipment and a use method thereof, and in particular to a device and a method for detecting the impact resistance of a diamond composite tooth. Background Art

[0002] Diamond composite teeth are super-hard composite teeth composed of a polycrystalline diamond layer and a cemented carbide matrix. They have the hardness and wear resistance of diamond, the impact resistance and weldability of cemented carbide, and have been widely used as drill teeth for geological and oil and gas well drill bits. In specific formations, they have basically replaced traditional cemented carbide drill teeth.

[0003] The impact resistance of diamond composite teeth refers to the ability of diamond composite teeth to resist impact loads, and is often used to measure the toughness or resistance to fracture of diamond composite teeth under impact. When diamond composite teeth are used as drill teeth, they will be subjected to strong impacts when breaking rocks, which will affect their performance and life, causing the diamond composite teeth to fail. Therefore, impact resistance is an important indicator to measure the quality of diamond composite teeth.

[0004] At present, the main testing method for the impact resistance of diamond composite teeth at home and abroad is the falling ball impact method, which uses a steel ball to impact the top of the diamond composite tooth, and the impact resistance of the product is calculated based on the impact energy of the steel ball and the number of falling balls. This method does not test the impact energy continuously, and the interval between the two impacts is long, which seriously deviates from the actual use status of the diamond composite tooth, cannot accurately reflect the impact resistance of the composite tooth, and has poor reliability. Summary of the invention

[0005] The problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a device and method for detecting the impact resistance of diamond composite teeth which are simple in structure, can reduce detection errors and have high reliability.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A device for testing the impact resistance of a diamond composite tooth comprises a bracket and an impact ball. The bracket is provided with a fixture, a sleeve and an impactor for repeatedly impacting the impact ball. The sleeve is located above the fixture. The impact ball is movably arranged in the sleeve and an impact window is provided at the bottom of the sleeve for the impact ball to impact the diamond composite tooth. The impact frequency of the impactor is 100-1000 times / minute, and the single impact work of the impactor is 10-300J.

[0008] As a further improvement of the above technical solution: it also includes an anvil, which is movably arranged between the impactor and the impact ball, the upper end of the anvil is provided with a flat portion cooperating with the impactor, and the lower end of the anvil is provided with an arc portion cooperating with the impact ball.

[0009] As a further improvement of the above technical solution: at least one observation window for observing the state of the impact ball is provided on the side wall of the sleeve.

[0010] As a further improvement of the above technical solution: a lower connecting plate and an upper connecting plate are provided on the bracket, the lower end of the impactor is connected to the lower connecting plate, and the upper end of the impactor is connected to the upper connecting plate.

[0011] As a further improvement of the above technical solution: a plurality of columns are provided on the bracket and arranged along the circumferential direction of the impactor, the lower connecting plate and the upper connecting plate are both provided on the columns, the upper end of the column is provided with a thread, and a first fastener is provided on the upper and lower sides of the upper connecting plate.

[0012] As a further improvement of the above technical solution: an intermediate connecting plate is also provided on the bracket, and the impactor is connected to the intermediate connecting plate.

[0013] As a further improvement of the above technical solution: a support plate is provided on the bracket, a mounting hole is opened on the support plate, a limiting flange is provided on the sleeve, the sleeve is inserted into the mounting hole, and the support plate is supported under the limiting flange.

[0014] As a further improvement of the above technical solution: the bracket is provided with threaded support columns at both ends of the support plate, the support plate is sleeved on the support columns, and the support columns are provided with second fasteners on both upper and lower sides of the support plate.

[0015] As a further improvement of the above technical solution: the clamp includes a three-jaw chuck and a composite tooth mounting cylinder, the composite tooth mounting cylinder is arranged on the three-jaw chuck, and the composite tooth mounting cylinder is provided with a third fastener for fixing the diamond composite tooth.

[0016] A detection method of the above-mentioned diamond composite tooth impact resistance detection device comprises the following steps:

[0017] S1: Install the test piece: install the diamond composite tooth to be tested on the fixture;

[0018] S2: Start testing: Turn on the impactor and start timing. The impactor repeatedly impacts the impact ball in the sleeve, so that the impact ball repeatedly impacts the diamond composite tooth to be tested. When the impactor rises and separates from the impact ball after each impact, the impact ball jumps once in the sleeve;

[0019] S3: Stop testing: When the diamond composite tooth to be tested breaks, turn off the impactor and stop timing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The diamond composite tooth impact resistance detection device disclosed in the present invention installs the diamond composite tooth to be detected on a fixture, and the impact ball is movably installed in the sleeve and abuts against the top of the diamond composite tooth through the impact window. The impactor is turned on and the timing is started. The impactor repeatedly impacts the impact ball in the sleeve, so that the impact ball repeatedly impacts the diamond composite tooth to be detected until the diamond composite tooth collapses, and the impactor is turned off and the timing is stopped. When the impactor rises and separates from the impact ball 2 after each impact, the impact ball jumps once in the sleeve, thereby updating the impact position of the impact ball for the next time, preventing the next impact from being in the same concave part of the impact ball, and reducing the error of the test data. The impactor impacts the diamond composite tooth to be detected at a high frequency, simulating the actual use state of the diamond composite tooth, reducing the detection error, and measuring the impact resistance of the diamond composite tooth by the product of the single impact work value, impact frequency and impact time of the impactor, which can accurately reflect the fatigue impact resistance of the diamond composite tooth, and has a simple structure and high reliability.

[0022] The detection method of the diamond composite tooth impact resistance detection device disclosed in the present invention uses an impactor to impact the diamond composite tooth to be detected at a high frequency. Compared with the traditional falling ball impact method, it is closer to the actual use state of the diamond composite tooth. The impact resistance of the diamond composite tooth is measured by the product of the single impact power value, impact frequency and impact time of the impactor, which can well reflect the fatigue impact resistance of the diamond composite tooth and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the diamond composite tooth impact resistance performance testing device of the present invention.

[0024] Figure 2 It is a schematic diagram of the main structure of the diamond composite tooth impact resistance performance testing device of the present invention.

[0025] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0026] Figure 4 It is a schematic diagram of the structure of the sleeve in the present invention.

[0027] Figure 5 for Figure 2 Enlarged view of point B in the middle.

[0028] Figure 6 It is a schematic diagram of the structure of the anvil in the present invention.

[0029] The numbers in the figure represent: 1. bracket; 11. lower connecting plate; 111. limiting part; 12. upper connecting plate; 13. column; 14. first fastener; 15. middle connecting plate; 2. impact ball; 3. clamp; 31. three-jaw chuck; 32. composite tooth mounting tube; 321. third fastener; 4. sleeve; 41. impact window; 42. observation window; 43. limiting flange; 5. impactor; 6. anvil; 61. plane part; 62. arc part; 7. support seat; 71. support plate; 72. support column; 73. second fastener; 8. diamond composite tooth. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Figures 1 to 6 An embodiment of the present invention is shown. The diamond composite tooth impact resistance performance detection device of this embodiment includes a bracket 1 and an impact ball 2. The bracket 1 is provided with a fixture 3, a sleeve 4 and an impactor 5 for repeatedly impacting the impact ball 2. The sleeve 4 is located above the fixture 3. The impact ball 2 is movably arranged in the sleeve 4 and an impact window 41 is provided at the bottom of the sleeve 4 for the impact ball 2 to impact the diamond composite tooth 8. The impact frequency of the impactor 5 is 100-1000 times / minute, and the single impact work of the impactor 5 is: 10~300J. In this embodiment, the impactor 5 is preferably an SPM-75 low-pressure down-the-hole impactor, the impact frequency is 600 times / minute, and the single impact work adjustment range is: 30~100J. The impact ball 2 is preferably a steel ball with a hardness of HRC62.

[0032] The diamond composite tooth impact resistance testing device is characterized in that the diamond composite tooth 8 to be tested is mounted on a fixture 3, the impact ball 2 is movably mounted in a sleeve 4 and abuts against the top of the diamond composite tooth 8 through an impact window 41, the impactor 5 is turned on and timing is started, and the impactor 5 repeatedly impacts the impact ball 2 in the sleeve 4, so that the impact ball 2 repeatedly impacts the diamond composite tooth 8 to be tested, until the diamond composite tooth 8 collapses, the impactor 5 is turned off and timing is stopped. When the impactor 5 rises and separates from the impact ball 2 after each impact, the impact ball 2 jumps once in the sleeve 4, thereby updating the impact position of the impact ball 2 for the next time, preventing the next impact from being at the same concave part of the impact ball 2, and reducing the error of the test data. By impacting the diamond composite tooth 8 to be tested with a high frequency by the impactor 5, the actual use state of the diamond composite tooth 8 is simulated, and the detection error is reduced. The impact resistance of the diamond composite tooth 8 is measured by the product of the single impact energy value, the impact frequency and the impact time of the impactor 5, which can accurately reflect the fatigue impact resistance of the diamond composite tooth 8, has a simple structure and high reliability.

[0033] Furthermore, in this embodiment, the diamond composite tooth impact resistance detection device further includes an anvil 6, which is movably arranged between the impactor 5 and the impact ball 2, and the upper end of the anvil 6 is provided with a flat portion 61 that matches the impactor 5, and the lower end of the anvil 6 is provided with an arc portion 62 that matches the impact ball 2. Specifically, the impactor 5 repeatedly impacts the flat portion 61 at the upper end of the anvil 6, and the anvil 6 transmits the impact force to the impact ball 2, so that the impact ball 2 repeatedly impacts the diamond composite tooth 8 to be detected, and the arc portion 62 at the lower end of the anvil 6 matches the spherical surface of the impact ball 2, so that the impact ball 2 is evenly stressed and is not easily damaged.

[0034] Furthermore, in this embodiment, two observation windows 42 for observing the state of the impact ball 2 are provided on the side wall of the sleeve 4. Through the observation windows 42, it is possible to observe whether the impact ball 2 in the sleeve 4 is jumping, and whether the impact ball 2 is damaged, thereby improving the accuracy of detection.

[0035] Furthermore, in this embodiment, the bracket 1 is provided with a lower connecting plate 11 and an upper connecting plate 12, the lower end of the impactor 5 is connected to the lower connecting plate 11, and the upper end of the impactor 5 is connected to the upper connecting plate 12. The lower connecting plate 11 and the upper connecting plate 12 are both provided with a limiting portion 111, and the impactor 5 passes through the limiting portions 111 on the lower connecting plate 11 and the upper connecting plate 12 in sequence and is fixed between the lower connecting plate 11 and the upper connecting plate 12 by fastening screws, which has a simple structure and reliable connection.

[0036] Furthermore, in this embodiment, three columns 13 are provided on the bracket 1 and arranged along the circumferential direction of the impactor 5, the lower connecting plate 11 and the upper connecting plate 12 are both provided on the columns 13, the upper end of the columns 13 is provided with threads, and the upper and lower sides of the upper connecting plate 12 are provided with first fasteners 14. Specifically, the lower connecting plate 11 is fixedly mounted on the column 13, and the upper connecting plate 12 is mounted on the column 13 by the first fasteners 14 on the upper and lower sides. The first fastener 14 is preferably a nut, and the upper connecting plate 12 is fixed by tightening the nuts on the upper and lower sides of the upper connecting plate 12, so that the upper connecting plate 12 can be adjusted in height according to different types of impactors, which is simple and convenient.

[0037] Furthermore, in this embodiment, the bracket 1 is further provided with an intermediate connecting plate 15, and the impactor 5 is connected to the intermediate connecting plate 15. The intermediate connecting plate 15 is also provided with a limiting portion 111, and the impactor 5 passes through the limiting portion 111 on the intermediate connecting plate 15 and is fixed by fastening screws, so that the impactor 5 is installed more firmly and prevents the impactor 5 from loosening due to the impact time being too long.

[0038] Furthermore, in this embodiment, a support seat 7 is provided on the bracket 1, the clamp 3 is fixed on the support seat 7, a support plate 71 is provided on the support seat 7, a mounting hole is opened on the support plate 71, a limiting flange 43 is provided on the sleeve 4, the sleeve 4 is inserted into the mounting hole, and the support plate 71 is supported below the limiting flange 43, so that the support is reliable. The support seat 7 is provided on the bracket 1 by fastening screws, so that the device is more convenient to disassemble and assemble, and is easy to maintain and maintain.

[0039] Furthermore, in this embodiment, threaded support columns 72 are provided on both sides of the support plate 71, the support columns 72 are provided on the support seat 7, the support plate 71 is sleeved on the support columns 72, and the support columns 72 are provided with second fasteners 73 on both upper and lower sides of the support plate 71. The second fasteners 73 are preferably nuts, and the support plate 71 is fixed to the support columns 72 through the nuts on the upper and lower sides, so that the support plate 71 can adjust the height according to the diamond composite teeth 8 of different heights, and the installation is convenient.

[0040] Furthermore, in this embodiment, the fixture 3 includes a three-jaw chuck 31 and a composite tooth mounting cylinder 32, the composite tooth mounting cylinder 32 is arranged on the three-jaw chuck 31, and the composite tooth mounting cylinder 32 is provided with a third fastener 321 for fixing the diamond composite tooth 8. Specifically, the diamond composite tooth 8 is installed in the composite tooth mounting cylinder 32 to prevent the three-jaw chuck 31 from clamping the surface of the diamond composite tooth 8, the composite tooth mounting cylinder 32 abuts against the bottom of the three-jaw chuck 31, and can withstand the impact force from the impactor 5, so as to prevent the diamond composite tooth 8 to be detected from falling off due to excessive impact force when the three-jaw chuck 31 is directly clamped, and the diamond composite tooth 8 to be detected is fixed by the third fastener 321, so that the diamond composite tooth 8 is convenient to clamp and disassemble, and the third fastener 321 is preferably a fastening screw.

[0041] The detection method of the diamond composite tooth impact resistance detection device of the present invention comprises the following steps:

[0042] S1: Installing the diamond composite tooth 8 to be tested: clamping the composite tooth installation cylinder 32 by the three-jaw chuck 31, installing the diamond composite tooth 8 to be tested in the composite tooth installation cylinder 32, and tightening the third fastener 321 to fix the diamond composite tooth 8 to be tested;

[0043] S2: Start detection: Turn on the impactor 5 and start timing. The impactor 5 repeatedly impacts the anvil 6. The anvil 6 transmits the impact force to the impact ball 2 in the sleeve 4, so that the impact ball 2 repeatedly impacts the diamond composite tooth 8 to be detected. When the impactor 5 rises and separates from the impact ball 2 after each impact, the impact ball 2 jumps once in the sleeve 4, thereby updating the impact position of the impact ball 2 for the next time, preventing the next impact from being on the same concave part of the impact ball 2;

[0044] S3: Stop detection: When the diamond composite tooth 8 to be detected is broken, the impactor 5 is turned off and the timing is stopped.

[0045] The detection method of the diamond composite tooth impact resistance detection device is to use the impactor 5 to impact the diamond composite tooth 8 to be detected at a high frequency, which is closer to the actual use state of the diamond composite tooth 8 than the traditional falling ball impact method. The impact resistance of the diamond composite tooth 8 is measured by the product of the single impact work value, impact frequency and impact time of the impactor 5, which can well reflect the fatigue impact resistance of the diamond composite tooth 8 and has high reliability.

[0046] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for testing the impact resistance of diamond composite teeth, characterized in that: The invention comprises a support (1) and an impact ball (2), wherein the support (1) is provided with a fixture (3), a sleeve (4) and an impactor (5) for repeatedly impacting the impact ball (2), wherein the sleeve (4) is located above the fixture (3), wherein the impact ball (2) is movably arranged in the sleeve (4), and an impact window (41) is provided at the bottom of the sleeve (4) for the impact ball (2) to impact a diamond composite tooth (8), wherein when the impactor (5) rises and separates from the impact ball (2) after each impact, the impact ball (2) jumps once in the sleeve (4), thereby updating the impact position of the impact ball (2) for the next time, wherein the impact frequency of the impactor (5) is 100-1000 times / minute, and the single impact energy of the impactor (5) is 10-300J; It also includes an anvil (6), the anvil (6) being movably arranged between the impactor (5) and the impact ball (2), the upper end of the anvil (6) being provided with a flat surface portion (61) cooperating with the impactor (5), and the lower end of the anvil (6) being provided with a curved surface portion (62) cooperating with the impact ball (2); The bracket (1) is provided with a lower connecting plate (11) and an upper connecting plate (12), the lower end of the impactor (5) is connected to the lower connecting plate (11), and the upper end of the impactor (5) is connected to the upper connecting plate (12); The bracket (1) is provided with a plurality of columns (13) arranged along the circumferential direction of the impactor (5); the lower connecting plate (11) and the upper connecting plate (12) are both provided on the columns (13); the upper ends of the columns (13) are provided with threads; and first fasteners (14) are provided on both upper and lower sides of the upper connecting plate (12).

2. The device for detecting the impact resistance of diamond composite teeth according to claim 1, characterized in that: At least one observation window (42) for observing the state of the impact ball (2) is provided on the side wall of the sleeve (4).

3. The device for detecting the impact resistance of diamond composite teeth according to claim 1, characterized in that: The bracket (1) is also provided with an intermediate connecting plate (15), and the impactor (5) is connected to the intermediate connecting plate (15).

4. The device for detecting the impact resistance of diamond composite teeth according to any one of claims 1 to 3, characterized in that: The bracket (1) is provided with a support plate (71), the support plate (71) is provided with a mounting hole, the sleeve (4) is provided with a limiting flange (43), the sleeve (4) is inserted into the mounting hole, and the support plate (71) is supported below the limiting flange (43).

5. The device for testing the impact resistance of diamond composite teeth according to claim 4, characterized in that: The bracket (1) is provided with threaded support columns (72) at both ends of the support plate (71); the support plate (71) is sleeved on the support columns (72); and the support columns (72) are provided with second fasteners (73) at both upper and lower sides of the support plate (71).

6. The device for testing the impact resistance of diamond composite teeth according to any one of claims 1 to 3, characterized in that: The clamp (3) comprises a three-jaw chuck (31) and a composite tooth mounting cylinder (32); the composite tooth mounting cylinder (32) is arranged on the three-jaw chuck (31); and a third fastener (321) for fixing the diamond composite tooth (8) is arranged on the composite tooth mounting cylinder (32).

7. A method for detecting the impact resistance performance of a diamond composite tooth according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Installing the test piece: installing the diamond composite tooth (8) to be tested on the fixture (3); S2: Start detection: Turn on the impactor (5) and start timing, and the impactor (5) repeatedly impacts the impact ball (2) in the sleeve (4), so that the impact ball (2) repeatedly impacts the diamond composite tooth (8) to be detected. When the impactor (5) rises and separates from the impact ball (2) after each impact, the impact ball (2) jumps once in the sleeve (4); S3: Stop detection: When the diamond composite tooth (8) to be detected collapses, the impactor (5) is turned off and the timing is stopped.

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