A method for rapidly and non-destructively determining the deformation of polycrystalline diamond (PCD)

Abstract

This invention discloses a rapid, non-destructive method for determining the deformation of polycrystalline diamond (PCD), comprising the following steps: Step 1: Grinding the surface of the PCD material using a grinding machine until the polycrystalline diamond layer is completely exposed; Step 2: Placing the polycrystalline diamond layer of the PCD material onto a surface grinding machine and grinding the upper side of the PCD material using the surface grinding machine; Step 3: Preliminarily processing the PCD material using the surface grinding machine to expose alloy layer 1, with the exposed point as the starting point; Step 4: Processing the PCD material again using the surface grinding machine until the cup covering the upper side of the PCD material is completely removed, with that point as the ending point. This invention allows for rapid deformation detection on the production line and is applicable to the deformation detection of gradient materials and heterogeneous materials with double or multi-layer structures. It changes the current situation where cutting profile measurements are required outside the production line, or ultrasonic testing is only applicable to homogeneous materials, facilitating the detection of PCD materials and improving detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of polycrystalline diamond (PCD) layer thickness measurement technology, specifically a method for rapid and non-destructive determination of PCD deformation. Background Technology

[0002] The thickness of the polycrystalline diamond layer in polycrystalline diamond (PCD) composite sheets is a crucial indicator for users. Controlling the deformation of PCD materials during production is critical, hence the ongoing search for methods to rapidly detect PCD material deformation. Currently, methods for measuring PCD material deformation include cross-sectional measurement and ultrasonic measurement.

[0003] When using cross-sectional measurements, it is necessary to cut the PCD material and then measure the diamond thickness from the side cross-section. This method requires damaging the material, resulting in a waste of resources.

[0004] When using ultrasonic measurement, the thickness of the polycrystalline diamond layer is detected by ultrasonic testing equipment. This method is suitable for measuring homogeneous materials and requires knowledge of the sound velocity penetrating the polycrystalline diamond layer. It cannot be used to measure the sound velocity of unknown materials for the first time; the sound velocity needs to be determined by calibration based on actual measurement data before it can be used to test the same material.

[0005] For polycrystalline diamond composite materials, during high-temperature and high-pressure synthesis, substances in the alloy diffuse into the polycrystalline diamond layer. The material composition gradient changes from the interface to the surface of the polycrystalline diamond layer, so its sound velocity value is not fixed, and the accuracy of detection for different thicknesses is not high. Summary of the Invention

[0006] The purpose of this invention is to provide a rapid and non-destructive method for determining the deformation of polycrystalline diamond (PCD), aiming to improve the problems of resource waste caused by measuring polycrystalline diamond layers after cutting and the low accuracy of ultrasonic monitoring.

[0007] This invention is achieved as follows: a method for rapid, non-destructive determination of the deformation of polycrystalline diamond (PCD), comprising...

[0008] Step 1: Grind the surface of the PCD material using a grinder until the polycrystalline diamond layer is fully exposed;

[0009] Step 2: Place the polycrystalline diamond layer of the PCD material onto a surface grinding machine and use the surface grinding machine to perform surface grinding on the upper side of the PCD material;

[0010] Step 3: Use a surface grinder to perform preliminary processing on the PCD material to expose the alloy layer, and use the exposed point as the starting point;

[0011] Step 4: Use a flat grinding machine to process the PCD material until the cups covering the sides of the PCD material are completely removed, and use that point as the end point.

[0012] Step 5: Calculate the feed rate of the surface grinding equipment from the starting point to the ending point.

[0013] Preferably, in step one, the lower side of the PCD material is ground using a grinder to remove the cup covering the lower side of the PCD material.

[0014] Preferably, if the lower side of the PCD material has a concave arc-shaped structure, during grinding, the uppermost point of the concave arc-shaped surface is taken as the termination point, and the plane where the termination point is located is the grinding line.

[0015] Preferably, if the lower side of the PCD material has an outwardly convex arc-shaped structure, the uppermost point of the outwardly convex arc-shaped surface is the termination point during grinding, and the plane where the termination point is located is the grinding line.

[0016] Preferably, the upper side of the PCD material has an outward convex structure. In the flat grinding process, a first flat grinding line is set at the uppermost end of the outer side of the cup sidewall, a second flat grinding line is set at the uppermost end of the inner side of the cup sidewall, and a third flat grinding line is set at the lowermost end of the cup sidewall.

[0017] Preferably, the upper side of the PCD material has a concave structure. In the flat grinding process, a second flat grinding line is set at the uppermost end of the inner side of the cup sidewall, a third flat grinding line is set at the uppermost end of the inner side of the cup sidewall, and a first flat grinding line is set at the uppermost end of the outer side of the cup sidewall.

[0018] Preferably, the first, second, and third flat grinding lines are all set parallel to the worktable of the flat grinding equipment, and the distance between the first and third flat grinding lines is the sum of the cup thickness and the deformation of the PCD material.

[0019] Preferably, when the second grinding line is reached, the alloy is exposed, which is set as the starting point. When the third grinding line is reached, the upper sidewall of the cup is completely removed and the alloy layer is fully exposed, which is set as the ending point.

[0020] Preferably, the spacing between the second and third grinding lines is equal to the deformation of the PCD material.

[0021] Preferably, during the surface grinding process, the feed rate of the surface grinding equipment is recorded, and the data is used to calculate the deformation.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the present invention can quickly detect deformation on the production line without damaging the product, and is applicable to the deformation detection of gradient materials and heterogeneous materials with double or multi-layer structures. It changes the current situation where cutting profile measurement is required outside the production line, or ultrasonic testing is only applicable to homogeneous materials, which facilitates the detection of PCD materials and improves the detection accuracy. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the first PCD material of the present invention;

[0024] Figure 2 This is a schematic diagram of the first PCD material before grinding according to the present invention;

[0025] Figure 3 This is a schematic diagram of the first PCD material after grinding according to the present invention;

[0026] Figure 4 This is a schematic diagram of the first PCD material surface grinding of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the second PCD material of the present invention;

[0028] Figure 6 This is a schematic diagram of the second PCD material before grinding according to the present invention;

[0029] Figure 7 This is a schematic diagram of the second PCD material after grinding according to the present invention;

[0030] Figure 8 This is a schematic diagram of the second PCD material surface grinding of the present invention;

[0031] Figure 9 This is an ideal model diagram of the PCD material of the present invention.

[0032] In the diagram: 1. Alloy layer; 2. Polycrystalline diamond layer; 3. Grinding line; 4. First flat grinding line; 5. Second flat grinding line; 6. Third flat grinding line; 7. Cup. Detailed implementation method:

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0035] To avoid waste in PCD material testing and the low accuracy of ultrasonic testing, this solution provides a new method for detecting PCD material deformation. Ideally, both layers of PCD material should be flat, as shown in the reference... Figure 9As shown, the upper and lower surfaces of the PCD material located in the metal cup are ideally planar. However, in actual processing, due to high temperature and pressure, as well as the difference in the expansion coefficients of the two-layer structure, the upper and lower surfaces of the PCD material deform simultaneously. That is, compared to the ideal PCD material, the upper and lower surfaces of the PCD material are either convex or concave. The method provided by this solution is to remove the convex or concave parts of the PCD material and record data during the removal process to determine the deformation of the PCD material. Therefore, this method records the surface grinding data from the blank to the finished product during PCD material processing, thereby characterizing the degree of deformation. This changes the current situation of cutting PCD material to form a cross-section and ultrasonic equipment inspection, avoiding resource waste and improving the accuracy of inspection.

[0036] The steps for measuring the deformation of PCD materials using the above method are as follows:

[0037] Step 1: Grind the surface of the PCD material using a grinder until the diamond layer is fully exposed;

[0038] Step 2: Place the diamond layer of the PCD material onto a surface grinding machine and use the surface grinding machine to perform surface grinding on the upper side of the PCD material;

[0039] Step 3: Use a flat grinding machine to perform preliminary processing on the PCD material to expose alloy layer 1, and take the exposed point as the starting point;

[0040] Step 4: Use a flat grinding machine to process the PCD material until the cups covering the sides of the PCD material are completely removed, and use that point as the end point.

[0041] Step 5: Calculate the feed rate of the surface grinding equipment from the starting point to the ending point.

[0042] Example 1

[0043] To avoid waste in PCD material testing and the low accuracy of ultrasonic testing, this solution provides a new method for detecting PCD material deformation. Ideally, both layers of PCD material should be flat, as shown in the reference... Figure 9As shown, the upper and lower surfaces of the PCD material located in the metal cup are ideally planar. However, in actual processing, due to high temperature and pressure, as well as the difference in the expansion coefficients of the two-layer structure, the upper and lower surfaces of the PCD material deform simultaneously. That is, compared to the ideal PCD material, the upper and lower surfaces of the PCD material are either convex or concave. The method provided by this solution is to remove the convex or concave parts of the PCD material and record data during the removal process to determine the deformation of the PCD material. Therefore, this method records the surface grinding data from the blank to the finished product during PCD material processing, thereby characterizing the degree of deformation. This changes the current situation of cutting PCD material to form a cross-section and ultrasonic equipment inspection, avoiding resource waste and improving the accuracy of inspection.

[0044] The steps for measuring the deformation of PCD materials using the above method are as follows:

[0045] Step 1: Grind the surface of the PCD material using a grinder until the diamond layer is fully exposed;

[0046] Step 2: Place the diamond layer of the PCD material onto a surface grinding machine and use the surface grinding machine to perform surface grinding on the upper side of the PCD material;

[0047] Step 3: Use a flat grinding machine to perform preliminary processing on the PCD material to expose alloy layer 1, and take the exposed point as the starting point;

[0048] Step 4: Use a flat grinding machine to process the PCD material until the cups covering the sides of the PCD material are completely removed, and use that point as the end point.

[0049] Step 5: Calculate the feed rate of the surface grinding equipment from the starting point to the ending point.

[0050] like Figure 1 , Figure 2 , Figure 3 As shown, when performing deformation processing on a PCD material with a concave arc-shaped structure on the lower side and a convex arc-shaped structure on the upper side, the PCD material is placed on a grinding machine, with the lower side of the PCD material in contact with the worktable of the grinding machine. Under the action of the grinding machine, the cup 7 wrapped around the PCD material is removed, and the grinding process is stopped when the uppermost point of the concave arc-shaped surface is taken as the termination point, that is, when the grinding reaches the plane where the termination point is located. At this time, the polycrystalline diamond layer 2 is completely exposed. Therefore, the plane where the termination point is located is set as the grinding line 3.

[0051] like Figure 4As shown, the ground PCD material is placed on a surface grinding machine. The highest point on the upper side of the PCD material (set as the first surface grinding line 4) is ground until the cup 7 at the highest point is removed, exposing the alloy layer 1. This plane is set as the second surface grinding line 5, which is the position of maximum deformation of the alloy layer 1. This is set as the starting point, and the feed amount (H1) of the surface grinding head is recorded. The surface grinding machine continues to grind the PCD material until the surface grinding head descends to the lowest point of the arc-shaped sidewall of the cup 7. This point is set as the third surface grinding line 6. At this point, both the upper and lower sides of the PCD material are flat, and the alloy layer 1 is fully exposed. This is set as the ending point, which is the same as the PCD material in the rational model. The feed amount (H2) of the surface grinding head descending to the third surface grinding line 6 is recorded. The deformation of the PCD material can be calculated by subtracting H2 from H1. This method can measure the deformation of PCD materials without damaging the product, and can quickly detect the deformation on the production line. It is applicable to the deformation detection of gradient materials and heterogeneous materials with two or more layers. It changes the current situation where cutting profile measurement is required outside the production line, or ultrasonic testing is only applicable to homogeneous materials. It facilitates the detection of PCD materials and improves the accuracy of detection.

[0052] Example 2

[0053] To avoid waste in PCD material testing and the low accuracy of ultrasonic testing, this solution provides a new method for detecting PCD material deformation. Ideally, both layers of PCD material should be flat, as shown in the reference... Figure 9 As shown, the upper and lower surfaces of the PCD material located in the metal cup are ideally planar. However, in actual processing, due to high temperature and pressure, as well as the difference in the expansion coefficients of the two-layer structure, the upper and lower surfaces of the PCD material deform simultaneously. That is, compared to the ideal PCD material, the upper and lower surfaces of the PCD material are either convex or concave. The method provided by this solution is to remove the convex or concave parts of the PCD material and record data during the removal process to determine the deformation of the PCD material. Therefore, this method records the surface grinding data from the blank to the finished product during PCD material processing, thereby characterizing the degree of deformation. This changes the current situation of cutting PCD material to form a cross-section and ultrasonic equipment inspection, avoiding resource waste and improving the accuracy of inspection.

[0054] The steps for measuring the deformation of PCD materials using the above method are as follows:

[0055] Step 1: Grind the surface of the PCD material using a grinder until the diamond layer is fully exposed;

[0056] Step 2: Place the diamond layer of the PCD material onto a surface grinding machine and use the surface grinding machine to perform surface grinding on the upper side of the PCD material;

[0057] Step 3: Use a flat grinding machine to perform preliminary processing on the PCD material to expose alloy layer 1, and take the exposed point as the starting point;

[0058] Step 4: Use a flat grinding machine to process the PCD material until the cups covering the sides of the PCD material are completely removed, and use that point as the end point.

[0059] Step 5: Calculate the feed rate of the surface grinding equipment from the starting point to the ending point.

[0060] like Figure 5 , Figure 6 , Figure 7 As shown, when performing deformation processing on a PCD material with a convex arc structure on the lower side and a concave arc structure on the upper side, the PCD material is placed on a grinding machine with the lower side of the PCD material in contact with the worktable of the grinding machine. Under the action of the grinding machine, the cup 7 wrapped around the PCD material is removed, and the grinding process is stopped when the uppermost point of the concave arc surface is taken as the termination point, that is, when the grinding reaches the plane where the termination point is located. At this time, the polycrystalline diamond layer 2 is completely exposed. Therefore, the plane where the termination point is located is set as the grinding line 3.

[0061] like Figure 8 As shown, the ground PCD material is placed on a surface grinding machine. The highest point on the upper side of the PCD material (set as the first surface grinding line 4) is ground until the cup 7 at the highest point is removed, exposing the alloy layer 1. This plane is set as the second surface grinding line 5, which is the position of maximum deformation of the alloy layer 1. This is set as the starting point, and the feed amount (H1) of the surface grinding head is recorded. The surface grinding machine continues to grind the PCD material until the surface grinding head descends to the lowest point of the arc-shaped sidewall of the cup 7. This point is set as the third surface grinding line 6. At this point, both the upper and lower sides of the PCD material are flat, and the alloy layer 1 is fully exposed. This is set as the ending point, which is the same as the PCD material in the rational model. The feed amount (H2) of the surface grinding head descending to the third surface grinding line 6 is recorded. The deformation of the PCD material can be calculated by subtracting H2 from H1. This method can measure the deformation of PCD materials without damaging the product, and can quickly detect the deformation on the production line. It is applicable to the deformation detection of gradient materials and heterogeneous materials with two or more layers. It changes the current situation where cutting profile measurement is required outside the production line, or ultrasonic testing is only applicable to homogeneous materials. It facilitates the detection of PCD materials and improves the accuracy of detection.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for rapid and non-destructive determination of the deformation of polycrystalline diamond (PCD), characterized in that, include Step 1: Grind the surface of the PCD material using a grinder until the polycrystalline diamond layer (2) is fully exposed; Step 2: Place the polycrystalline diamond layer (2) of the PCD material onto a flat grinding machine and use the flat grinding machine to perform flat grinding on the upper side of the PCD material; Step 3: Use a flat grinding machine to perform preliminary processing on the PCD material to expose the alloy layer (1), and take the exposed point as the starting point; Step 4: Use a flat grinding machine to process the PCD material until the cup (7) wrapped on the side of the PCD material is completely removed, and use that point as the end point. Step 5: Calculate the feed rate of the surface mill from the starting point to the ending point; During the surface grinding process, the feed rate of the surface grinding equipment is recorded, and the data is used to calculate the deformation.

2. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 1, characterized in that, In step one, the lower side of the PCD material is ground using a grinder to remove the cup (7) covering the lower side of the PCD material.

3. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 2, characterized in that, If the lower side of the PCD material is a concave arc-shaped structure, during grinding, the uppermost point of the concave arc-shaped surface is taken as the termination point, and the plane where the termination point is located is the grinding line (3).

4. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 2, characterized in that, If the lower side of the PCD material is a convex arc-shaped structure, the uppermost point of the convex arc-shaped surface is the termination point during grinding, and the plane where the termination point is located is the grinding line (3).

5. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 3, characterized in that, The upper side of the PCD material has an outward convex structure. In the flat grinding process, a first flat grinding line (4) is set at the uppermost end of the outer side of the cup (7), a second flat grinding line (5) is set at the uppermost end of the inner side of the cup (7), and a third flat grinding line (6) is set at the lowermost end of the cup (7).

6. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 4, characterized in that, The upper side of the PCD material has a concave structure. In the flat grinding process, a second flat grinding line (5) is set at the uppermost end of the inner side of the cup (7) side wall, a third flat grinding line (6) is set at the uppermost end of the inner side of the cup (7) side wall, and a first flat grinding line (4) is set at the uppermost end of the outer side of the cup (7) side wall.

7. A method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 5 or 6, characterized in that, The first flat grinding line (4), the second flat grinding line (5) and the third flat grinding line (6) are all set parallel to the worktable of the flat grinding equipment. The distance between the first flat grinding line (4) and the third flat grinding line (6) is the sum of the thickness of the cup (7) and the deformation of the PCD material.

8. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 7, characterized in that, When the surface is ground to the second surface grinding line (5), the alloy is exposed and is set as the starting point. When the surface is ground to the third surface grinding line (6), the upper side wall of the cup (7) is completely removed and the alloy layer (1) is completely exposed and is set as the ending point.

9. The method for rapid non-destructive determination of polycrystalline diamond (PCD) deformation according to claim 8, characterized in that, The spacing between the second flat grinding line (5) and the third flat grinding line (6) is the deformation of the PCD material.

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