Superhard abrasive roller with positive and negative rake angles and preparation method thereof

Abstract

The present invention relates to the technical field of abrasive processing. Specifically, it relates to a superhard abrasive roller with positive and negative rake angles and a preparation method thereof. The superhard abrasive roller with positive and negative rake angles is installed on a superhard abrasive roller processing device to process the cutting edge; the superhard abrasive roller with positive and negative rake angles includes a plurality of superhard abrasive grains and a matrix; the superhard abrasive grains include a first abrasive grain and a second abrasive grain; the first abrasive grain and the second abrasive grain are alternately distributed on the edge of the matrix; both the first abrasive grain and the second abrasive grain have a plurality of cutting edges, and the cutting edges have designed angles; the first abrasive grain and the second abrasive grain respectively have a plurality of identical cutting edges, and the designed angle of the cutting edge of the first abrasive grain is not the same as the designed angle of the cutting edge of the second abrasive grain; the cutting edges of the first abrasive grain and the second abrasive grain both include a rake face and a flank face; through the present invention, the positive and negative rake angle cutting edges are alternately cut and ground during the roller dressing, improving the grinding force, dressing efficiency and facilitating the timely discharge of debris during the roller dressing process.

Description

Technical Field

[0001] The present invention relates to the technical field of abrasive processing, and more specifically, to a superhard abrasive roller with positive and negative rake angles and a preparation method thereof. Background Art

[0002] The superhard abrasive roller is an important tool for mechanically dressing grinding wheels. In the prior art, when using a roller interpolation to dress a superhard abrasive concave formed grinding wheel, the roller profile is generally a single arc shape. It is necessary to establish a mathematical model of the dressing wheel motion trajectory identical to the formed surface, so that the arc center of the roller moves along a predetermined trajectory. By controlling the linkage of each coordinate direction of the roller dresser through a numerical control device, the grinding wheel is dressed to the required formed surface. By setting different mathematical models, different grinding wheel formed surfaces can be dressed.

[0003] Since the superhard abrasive roller contacts the superhard abrasive concave formed grinding wheel in a "hard-to-hard" manner during dressing, the grinding force is large during the dressing process, the chip space is extremely small, the roller arc is easily worn, the dressing efficiency is extremely low, it is difficult to guarantee the accuracy when dressing a small concave arc, and chatter will occur in the later stage of dressing, making the dressing impossible to continue. Summary of the Invention

[0004] Aiming at the defects of the prior art, the present invention provides a superhard abrasive roller with positive and negative rake angles and a preparation method thereof. By using an ultrashort pulse laser to alternately process positive and negative rake angle edges on the superhard abrasive roller, the positive and negative rake angle edges alternately cut and grind during roller dressing, thereby improving the grinding force, dressing efficiency during the roller dressing process and facilitating the timely discharge of chips.

[0005] To achieve the above object, the technical solution adopted by the present invention provides a superhard abrasive roller with positive and negative rake angles and a preparation method thereof. The superhard abrasive roller with positive and negative rake angles is installed on a superhard abrasive roller processing device to process the cutting edges;

[0006] The superhard abrasive roller with positive and negative rake angles includes a plurality of superhard abrasive grains and a matrix;

[0007] The superhard abrasive grains include first abrasive grains and second abrasive grains;

[0008] The first abrasive grains and the second abrasive grains are alternately distributed on the edge of the matrix;

[0009] Both the first abrasive grains and the second abrasive grains have a plurality of cutting edges, the cutting edges have a designed angle, and the cutting edges are processed by laser;

[0010] The first abrasive grains and the second abrasive grains respectively have a plurality of identical cutting edges, and the designed angle of the cutting edges of the first abrasive grains is not the same as the designed angle of the cutting edges of the second abrasive grains;

[0011] The cutting edge of the first abrasive grain and the cutting edge of the second abrasive grain both include a rake face and a flank face;

[0012] The first abrasive grains are positive rake angle abrasive grains, and the second abrasive grains are negative rake angle abrasive grains; the positive rake angle abrasive grains include positive rake angle abrasive grain cutting edges, positive rake angle abrasive grain rake faces, and positive rake angle abrasive grain flank faces; the negative rake angle abrasive grains include negative rake angle abrasive grain cutting edges, negative rake angle abrasive grain rake faces, and negative rake angle abrasive grain flank faces; the positive rake angle abrasive grain rake faces, the positive rake angle abrasive grain flank faces, the negative rake angle abrasive grain rake faces, and the negative rake angle abrasive grain flank faces all have grinding surfaces;

[0013] The positive rake angle abrasive grain flank face and the negative rake angle abrasive grain flank face constitute the positive and negative rake angle clockwise alternating grinding face of the positive and negative rake angle superhard abrasive roller; the positive rake angle abrasive grain flank face and the negative rake angle abrasive grain flank face constitute the positive and negative rake angle counterclockwise alternating grinding face of the positive and negative rake angle superhard abrasive roller.

[0014] Further, the cutting edge of the first abrasive grain is the cutting edge of the positive rake angle abrasive grain, and the cutting edge of the second abrasive grain is the cutting edge of the negative rake angle abrasive grain.

[0015] Furthermore, the substrate is a metal substrate;

[0016] The metal matrix is a circular structure with a thick middle and thin edges;

[0017] The super-hard abrasive particles have a cutting edge at one end with the cutting edge opening facing the outer side of the circumferential surface of the edge of the metal substrate, and the end of the super-hard abrasive particles opposite to the cutting edge is fixed to the circumferential surface of the edge of the metal substrate by brazing or powder metallurgy.

[0018] A method for preparing a super-hard abrasive roller with positive and negative rake angles, the super-hard abrasive roller with positive and negative rake angles comprising super-hard abrasive particles and a metal matrix; the super-hard abrasive particles comprising positive rake angle abrasive particles and negative rake angle abrasive particles; the positive rake angle abrasive particles comprising positive rake angle abrasive particle edges, positive rake angle abrasive particle front cutting surfaces and positive rake angle abrasive particle flank surfaces; the negative rake angle abrasive particles comprising negative rake angle abrasive particle edges, negative rake angle abrasive particle front cutting surfaces and negative rake angle abrasive particle flank surfaces; the method for preparing the super-hard abrasive roller with positive and negative rake angles comprises:

[0019] Step 1: Fix the super-hard abrasive roller to be processed on the super-hard abrasive roller rotary cutting laser processing device;

[0020] Step 2: according to the designed cutting edge width of the positive rake angle abrasive grain, a matching numerical control interpolation path and laser parameters such as laser average power and repetition frequency are set to process an adjacent cutting edge on the positive rake angle abrasive grain;

[0021] Step 3: Based on Step 2, rotate the rotatable worktable by 360° / n according to the designed number n of positive rake angle abrasive grains, and repeat Step 2 until all the positive rake angle abrasive grains are processed;

[0022] Step 4: After all the positive rake angle abrasive grains are processed in Step 3, rotate the rotatable worktable by 180° / n according to the designed number n of negative rake angle abrasive grains, and process the adjacent cutting edges on one negative rake angle abrasive grain;

[0023] Step 5: Based on Step 4, with each negative rake angle abrasive grain and each positive rake angle abrasive grain distributed alternately according to the designed number n of negative rake angle abrasive grains, rotate the rotatable worktable by 360° / n and repeat Step 4 until all the negative rake angle abrasive grains are processed.

[0024] Further, the processing of the adjacent cutting edges on one positive rake angle abrasive grain in Step 2 specifically includes:

[0025] Step 2.1: Process adjacent cutting edges with a set angle on the positive rake angle abrasive grain according to the laser beam emitted by the optical rotation module. The laser beam emitted by the optical rotation module starts from the highest point O1 recorded in Step 1 and processes along a set trajectory; after processing the first cutting edge of the first positive rake angle abrasive grain, the precision slide table together with the optical rotation module moves to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O2. The laser beam starts from the set O2 and processes the second cutting edge along the set trajectory;

[0026] Step 2.2: After the two adjacent cutting edges of the positive rake angle abrasive grain in Step 2.1 are processed, the precision slide table together with the optical rotation module moves to the starting point O1 of Step 1.

[0027] Further, the processing of the adjacent cutting edges on one negative rake angle abrasive grain in Step 4 specifically includes:

[0028] Step 4.1: Set the laser parameters to be the same as those set in Step 2 according to the designed width of the cutting edge of the negative rake angle abrasive grain;

[0029] Step 4.2: Process adjacent cutting edges with a set angle on the negative rake angle abrasive grain according to the laser beam emitted by the optical rotation module. The laser beam starts from the highest point O1 recorded in Step 1 and processes along a set trajectory; after processing the first cutting edge of the first negative rake angle abrasive grain, the precision slide table together with the optical rotation module moves to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O3. The laser beam starts from the set O3 and processes the second cutting edge along the set trajectory, and processes the rake face and flank face of the negative rake angle abrasive grain respectively.

[0030] Furthermore, the laser beam has three modes: a negative taper laser beam, a zero taper laser beam, and a positive taper laser beam.

[0031] Furthermore, when machining one edge of the positive rake angle abrasive grain in step 2, the initial laser beam uses a positive taper laser beam. When the positive taper laser beam moves from the coordinate origin to the middle position of the designed width of the edge, it is switched to a negative taper laser beam until the machining is completed according to the set movement trajectory of the laser beam, and the rake face and flank face of the positive rake angle abrasive grain are machined respectively.

[0032] When machining one edge of the negative rake angle abrasive grain in step 4, the initial laser beam uses a negative taper laser beam. When the negative taper laser beam moves from the coordinate origin to the middle position of the designed width of the edge, it is switched to a positive taper laser beam until the machining is completed according to the set movement trajectory of the laser beam, and the rake face and flank face of the negative rake angle abrasive grain are machined respectively.

[0033] The beneficial effects of the present invention are as follows:

[0034] First, the technical solution adopted by the present invention is to machine multi-angle edges on the superhard abrasive grains of the superhard abrasive wheel to be machined through a superhard abrasive wheel rotary cutting laser processing device. During the process of dressing the grinding wheel, the number of edges participating in grinding is increased, greatly reducing the force and heat in the machining process. At the same time, the multi-angle edges adopt an alternating design of positive rake angle abrasive grains and negative rake angle abrasive grains, integrating the respective advantages of positive rake angle cutting and negative rake angle grinding. The superhard abrasive wheel with multi-angle edges increases the number of cutting edges and the chip space, which can greatly reduce the grinding force in the grinding process and improve the grinding efficiency.

[0035] Second, the positive rake angle abrasive grains and negative rake angle abrasive grains of the present invention respectively have multiple identical edges, and the designed angles of the edges of the positive rake angle abrasive grains are not the same as those of the edges of the negative rake angle abrasive grains. The positive rake angle abrasive grains and negative rake angle abrasive grains are alternately distributed on the circumferential surface of the edge of the metal matrix. The flank face of the positive rake angle abrasive grain and the rake face of the negative rake angle abrasive grain form the positive and negative rake angle clockwise alternating grinding faces of the positive and negative rake angle superhard abrasive wheel, and the rake face of the positive rake angle abrasive grain and the flank face of the negative rake angle abrasive grain form the positive and negative rake angle counterclockwise alternating grinding faces of the positive and negative rake angle superhard abrasive wheel. After the edge is worn to a certain extent, when the grinding wheel is reversely clamped or the spindle of the grinding wheel dresser rotates in reverse, the positive rake angle abrasive grain becomes a negative rake angle abrasive grain, and the negative rake angle abrasive grain becomes a positive rake angle abrasive grain, which can continue the grinding process and improve the service life of the superhard abrasive wheel. Description of the Drawings

[0036] Figure 1 is a schematic diagram of the superhard abrasive wheel rotary cutting laser processing device according to the embodiment of the present invention;

[0037] Figure 2It is a schematic diagram of the laser galvanometer processing device for superhard abrasive wheels according to an embodiment of the present invention;

[0038] Figure 3 It is a front view of the overall structure of the positive and negative rake angle superhard abrasive wheel according to an embodiment of the present invention;

[0039] Figure 4 It is Figure 3 A partial enlarged view of the superhard abrasive grains;

[0040] Figure 5 It is a side view of the overall structure of the positive and negative rake angle superhard abrasive wheel according to an embodiment of the present invention;

[0041] Figure 6 It is Figure 5 A partial enlarged view of the superhard abrasive grains;

[0042] Figure 7 It is Figure 4 A partial enlarged view of the positive rake angle cutting edge;

[0043] Figure 8 It is a schematic diagram of three-mode laser beams according to an embodiment of the present invention;

[0044] Figure 9 It is Figure 4 A partial enlarged view of the negative rake angle cutting edge.

[0045] Wherein, A1 - ultra-short pulse laser light source; A2 - CCD module; A3 - reflecting mirror; A4 - optical rotation module; A5 - focusing system; A6 - precision coaxial air blowing device; A7 - rotatable workbench; A8 - turntable body; A9 - precision slide; A10 - scanning galvanometer system; B - superhard abrasive wheel to be processed; 1 - positive and negative rake angle superhard abrasive wheel; 10 - superhard abrasive grains; 100 - positive rake angle abrasive grains; 1000 - positive rake angle abrasive grain cutting edge; 1001 - positive rake angle abrasive grain flank; 1002 - positive rake angle abrasive grain face; 101 - negative rake angle abrasive grains; 1010 - negative rake angle abrasive grain cutting edge; 1011 - negative rake angle abrasive grain face; 1012 - negative rake angle abrasive grain flank; 11 - metal matrix. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] It should be noted that for a superhard abrasive wheel with positive and negative rake angles and its preparation method provided by the present invention, the superhard abrasive wheel to be processed is installed on a superhard abrasive wheel processing device, and the superhard abrasive wheel processing device can adopt a superhard abrasive wheel rotary cutting laser processing device or a superhard abrasive wheel laser galvanometer processing device for edge machining of the superhard abrasive wheel to be processed.

[0048] As Figure 1 shown, the superhard abrasive wheel rotary cutting laser processing device includes an ultrashort pulse laser light source A1, a CCD module A2, a reflecting lens A3, a polarization rotation module A4, a focusing system A5, a precision coaxial air blowing device A6, a rotatable workbench A7, a turntable body A8, and a precision slide A9. The superhard abrasive wheel B to be processed is fixedly installed on the superhard abrasive wheel rotary cutting laser processing device.

[0049] Figure 1 The coordinates in

[0050] represent the current position coordinates of the superhard abrasive wheel rotary cutting laser processing device.

[0051] The turntable body A8 has rotation axes perpendicular to the XOZ plane and perpendicular to the YOZ plane. The rotation axis perpendicular to the XOZ plane rotates around the coordinate Y axis, and the rotation axis perpendicular to the YOZ plane rotates around the coordinate X axis.

[0052] The polarization rotation module A4 and the focusing system A5 are fixed on the precision slide A9. The precision slide A9 can move up and down along the Z axis to ensure that the surface of the part to be processed is located at the laser focal plane. At the same time, the precision slide A9 moves along the X axis and the Y axis through precision guide rails.

[0053] The movements of the precision slide A9 along the X axis, Y axis, and Z axis, and the rotations of the rotatable workbench A7 around the Y axis and X axis are all controlled by the numerical control system and servo motors of the superhard abrasive wheel rotary cutting laser processing device, which can achieve multi-axis linkage and ensure high automation of processing.

[0054] At the bottom of the precision slide table A9, a horizontally installed focusing system A5 is fixed through a bracket. The precision coaxial blowing device A6 is located at the bottom of the focusing system A5. The processing area of the superhard abrasive roller B to be processed is located below the precision coaxial blowing device A6. The precision coaxial blowing device A6 is used to blow inert gas into the processing area of the superhard abrasive roller B to be processed, effectively isolating oxygen, avoiding high-temperature deterioration of the material surface, quickly removing the vaporized and fragmented materials, and ensuring the material processing efficiency and processing quality.

[0055] Above the precision slide table A9, a polarization rotation module A4 is provided. The ultra-short pulse laser source A1 emits pulsed laser. The pulsed laser is reflected by the reflection mirror A3 and enters the polarization rotation module A4. The CCD module A2 monitors the processing process in real time. The laser emitted from the polarization rotation module A4 is focused by the focusing system A5. The focused laser focus makes a high-speed circular motion on the processed plane to form a rotary cutting. The high-speed rotating laser can ensure uniform energy distribution within the entire radiation area and reduce the influence caused by beam polarization and spot shape.

[0056] As Figure 2 shown, in another embodiment, the superhard abrasive roller B to be processed is installed on a superhard abrasive roller laser galvanometer processing device. The superhard abrasive roller laser galvanometer processing device replaces the ultra-short pulse laser source A1, CCD module A2, reflection mirror A3, polarization rotation module A4, and focusing system A5 in the superhard abrasive roller rotary cutting laser processing device with a scanning galvanometer system A10. The superhard abrasive roller B to be processed is fixed on the rotatable worktable A7 through a clamp.

[0057] Figure 2 The coordinates in

[0058] represent the current position coordinates of the superhard abrasive roller laser galvanometer processing device. The rotatable worktable A7 is arranged on the rotation axis of the turntable body A8 perpendicular to the XOZ plane and rotates through the rotation axes of the turntable body A8 perpendicular to the XOZ plane and YOZ plane, driving the superhard abrasive roller B to be processed on the rotatable worktable A7 to rotate around the Y-axis and X-axis respectively.

[0059] The scanning galvanometer system A10 is fixed on the precision slide table A9. The precision slide table A9 can move up and down along the Z-axis direction to ensure that the surface of the part to be processed is located at the laser focal plane. At the same time, the precision slide table A9 moves along the X-axis and Y-axis directions through precision guide rails.

[0060] The scanning galvanometer system A10 sets a matching laser scanning path. The beam vertically emitted by the scanning galvanometer system A10 irradiates the highest point of the superhard abrasive roller tool B to be processed. The highest point is set according to the structure of the superhard abrasive roller tool B to be processed.

[0061] As Figure 3 、 Figure 4 、Figure 5 , Figure 6 As shown, a superhard abrasive roller with positive and negative rake angles and its preparation method provided by the present invention. The superhard abrasive roller B to be processed is transformed into a superhard abrasive roller 1 with positive and negative rake angles through the superhard abrasive roller rotary cutting laser processing device. The superhard abrasive roller 1 with positive and negative rake angles includes superhard abrasive grains 10 and a metal matrix 11.

[0062] The metal matrix 11 is a circular structure with a thick middle and thin edges. There are multiple superhard abrasive grains 10. One end of the superhard abrasive grains 10 is consolidated on the circumferential surface of the edge of the metal matrix 11 by brazing or powder metallurgy. The other end of the superhard abrasive grains 10 has a cutting edge, and the opening of the cutting edge faces the outside of the circumferential surface of the edge of the metal matrix 11.

[0063] The superhard abrasive grains 10 include positive rake angle abrasive grains 100 and negative rake angle abrasive grains 101. The positive rake angle abrasive grains 100 and negative rake angle abrasive grains 101 are used for dressing the grinding wheel. Each positive rake angle abrasive grain 100 and each negative rake angle abrasive grain 101 are distributed alternately on the circumferential surface of the edge of the metal matrix 11.

[0064] As Figure 4 , Figure 7 , Figure 9 shown, both the positive rake angle abrasive grains 100 and the negative rake angle abrasive grains 101 have multiple cutting edges. The cutting edges have designed angles. The multiple cutting edges increase the chip space, which can greatly reduce the grinding force during the grinding process and improve the grinding efficiency. When machining the cutting edges of the positive rake angle abrasive grains 100 and the negative rake angle abrasive grains 101, the metal matrix 11 is fixed on the rotatable worktable A7 of the superhard abrasive roller rotary cutting laser processing device by a caliper.

[0065] In this embodiment, the positive rake angle abrasive grains 100 and the negative rake angle abrasive grains 101 respectively have two identical cutting edges, and the designed angles of the two cutting edges of the positive rake angle abrasive grains 100 are not the same as those of the two cutting edges of the negative rake angle abrasive grains 101. The positive rake angle abrasive grains 100 include a positive rake angle abrasive grain cutting edge 1000, a positive rake angle abrasive grain rake face 1002, and a positive rake angle abrasive grain flank face 1001. The negative rake angle abrasive grains 101 include a negative rake angle abrasive grain cutting edge 1010, a negative rake angle abrasive grain flank face 1012, and a negative rake angle abrasive grain rake face 1011.

[0066] The positive rake angle abrasive grain rake face 1002, the positive rake angle abrasive grain flank face 1001, the negative rake angle abrasive grain rake face 1011, and the negative rake angle abrasive grain flank face 1012 all have grinding functions.

[0067] When the positive and negative rake angle superabrasive wheel 1 rotates clockwise, the flank face 1001 of the positive rake angle abrasive grains and the rake face 1011 of the negative rake angle abrasive grains achieve the alternating grinding of the positive and negative rake angle flank faces of the positive and negative rake angle superabrasive wheel 1; when the positive and negative rake angle superabrasive wheel 1 rotates counterclockwise, the rake face 1002 of the positive rake angle abrasive grains and the flank face 1012 of the negative rake angle abrasive grains achieve the alternating grinding of the positive and negative rake angle flank faces of the positive and negative rake angle superabrasive wheel 1. The alternating grinding of positive and negative rake angles can improve the grinding force and heat in machining, the quality and integrity of the surface to be machined, and the machining efficiency. At the same time, after the positive and negative rake angle superabrasive wheel 1 is worn to a certain extent during clockwise grinding, when it is reversely clamped or the spindle of the dresser rotates in reverse, the positive and negative rake angle superabrasive wheel 1 realizes counterclockwise grinding of the grinding wheel, improving the service life of the positive and negative rake angle superabrasive wheel 1.

[0068] Example 1:

[0069] A superabrasive wheel with positive and negative rake angles and a preparation method thereof provided by the present invention, the preparation method includes the following steps:

[0070] Step 1: Fix the superabrasive wheel B to be processed on the superabrasive wheel rotary laser processing device.

[0071] As Figure 1 , Figure 3 shown, fix the metal matrix 11 on the rotatable workbench A7 through a caliper, rotate the rotatable workbench A7 by 90°, make the tabletop of the rotatable workbench A7 parallel to the XOZ plane, adjust the position of the precision slide A9, so that the beam vertically emitted by the focusing system A5 irradiates the highest point of the superabrasive wheel B to be processed, and record the highest point as the coordinate origin O1.

[0072] Step 2: According to the designed width of the edge of the positive rake angle abrasive grains 100, set the matching numerical control interpolation path and laser parameters such as laser average power and repetition frequency, and process the adjacent edges on one positive rake angle abrasive grain 100.

[0073] Step 2.1: Process adjacent edges with a set angle on the positive rake angle abrasive grains 100 according to the laser beam emitted by the optical rotation module A4.

[0074] As Figure 7 shown, each edge has a flank face 1001 of the positive rake angle abrasive grains and a rake face 1002 of the positive rake angle abrasive grains.

[0075] As Figure 8As shown, the laser beam emitted by the optical rotation module A4 has three modes. By selecting matching optical rotation module parameters such as the rotation speed, prism angle, and position of the translation mirror, the laser beam starts from the highest point O1 recorded in step 1 and processes along the set trajectory. After machining the first cutting edge of the first positive rake angle abrasive grain 100, the precision slide table A9 together with the optical rotation module A4 moves to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O2. The laser beam starts from the set O2 and processes the second cutting edge along the set trajectory.

[0076] In this embodiment, the laser beam emitted by the optical rotation module A4 adopts two modes. When machining one cutting edge of the positive rake angle abrasive grain 100, the initial laser beam adopts a positive taper laser beam. After the positive taper laser beam moves from the coordinate origin to the middle position of the designed width of the cutting edge, it is switched to a negative taper laser beam until the machining is completed according to the set movement trajectory of the laser beam, and the flank face 1001 of the positive rake angle abrasive grain and the rake face 1002 of the positive rake angle abrasive grain of the positive rake angle abrasive grain 100 are respectively machined.

[0077] In another embodiment of this example, the laser beam emitted by the optical rotation module A4 adopts three modes. When machining one cutting edge of the positive rake angle abrasive grain 100, the initial laser beam adopts a positive taper laser beam. After the positive taper laser beam machines the flank face 1001 of the positive rake angle abrasive grain from the coordinate origin, the positive taper laser beam is switched to a cylindrical laser beam. The cylindrical laser beam moves along the set movement trajectory to the set position and is switched to a negative taper laser beam for machining the rake face 1002 of the positive rake angle abrasive grain.

[0078] Step 2.2: After machining the two adjacent cutting edges of the positive rake angle abrasive grain 100 in step 2.1, the precision slide table A9 together with the optical rotation module A4 moves to the starting point O1 of step 1.

[0079] Step 3: On the basis of step 2, according to the designed number n of the positive rake angle abrasive grains 100, rotate the rotatable worktable A7 by 360° / n, and repeat step 2 until all the positive rake angle abrasive grains 100 are machined.

[0080] Step 4: After machining all the positive rake angle abrasive grains 100 in step 3, according to the designed number n of the negative rake angle abrasive grains 101, rotate the rotatable worktable A7 by 180° / n to machine the adjacent cutting edges on one negative rake angle abrasive grain 101.

[0081] Step 4.1: According to the designed width of the cutting edge of the negative rake angle abrasive grain 101, the laser parameters are set the same as those in step 2, and adjacent cutting edges with a set angle are machined on the negative rake angle abrasive grain 101 according to the laser beam emitted by the optical rotation module A4.

[0082] As Figure 9As shown, each cutting edge has a negative rake angle abrasive face 1011 and a negative rake angle flank face 1012.

[0083] Step 4.2: The laser beam starts from the highest point O1 recorded in Step 1 and processes along the set trajectory. After processing the first cutting edge of the first negative rake angle abrasive grain 101, the precision slide table A9 together with the optical rotation module A4 moves to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O3. The laser beam processes the second cutting edge with O3 as the starting point along the set trajectory, and processes the negative rake angle abrasive face 1011 and the negative rake angle flank face 1012 of the negative rake angle abrasive grain 101 respectively.

[0084] It should be noted that the operation method of Step 4 is the same as that of Step 2, and the difference from Step 2 lies in the mode of the initial laser beam and the mode of the laser beam at the end.

[0085] In this embodiment, the laser beam emitted by the optical rotation module A4 adopts two modes. When processing one cutting edge of the negative rake angle abrasive grain 101, the initial laser beam adopts a negative taper laser beam. When the negative taper laser beam moves from the coordinate origin to the middle position of the designed width of the cutting edge, it is switched to a positive taper laser beam until the processing is completed according to the set movement trajectory of the laser beam.

[0086] In another embodiment of this example, the laser beam emitted by the optical rotation module A4 adopts three modes. When processing one cutting edge of the negative rake angle abrasive grain 101, the initial laser beam adopts a negative taper laser beam. After the negative taper laser beam processes the negative rake angle abrasive face 1011 of the negative rake angle abrasive grain, the negative taper laser beam is switched to a cylindrical laser beam. The cylindrical laser beam moves along the set movement trajectory to the set position and is switched to a positive taper laser beam for the processing of the negative rake angle flank face 1012.

[0087] Step 5: On the basis of Step 4, according to the designed number n of the negative rake angle abrasive grains 101, each negative rake angle abrasive grain 101 and each positive rake angle abrasive grain 100 are distributed alternately. Rotate the rotatable worktable A7 by 360° / n, and repeat Step 4 until all the negative rake angle abrasive grains 101 are processed.

[0088] Embodiment 2:

[0089] A superhard abrasive roller with positive and negative rake angles and a preparation method thereof provided by the present invention, the preparation method comprising the following steps:

[0090] Step 1: Fix the superhard abrasive roller B to be processed on the superhard abrasive roller laser galvanometer processing device.

[0091] As Figure 2 、 Figure 3As shown, the metal substrate 11 is fixed on the rotatable workbench A7 by a caliper. The rotatable workbench A7 is rotated by 90°, so that the tabletop of the rotatable workbench A7 is parallel to the XOZ plane. The position of the precision slide A9 is adjusted so that the beam vertically emitted by the scanning galvanometer system A10 irradiates the highest point of the superhard abrasive roller B to be processed, and the highest point is recorded as the coordinate origin O4.

[0092] Step 2: According to the angle γ1 of the rake face 1002 of the positive rake angle abrasive grains designed, set the matching laser parameters such as the average laser power, repetition frequency, and scanning speed. Adjacent cutting edges with a set angle are processed on a positive rake angle abrasive grain 100 by the laser beam emitted by the optical rotation module A4.

[0093] Step 2.1: The precision slide A9 together with the scanning galvanometer system A10 moves along the direction set on the X-axis, and the moving distance is R×sin(90° - γ1), where R is the radius of the positive and negative rake angle superhard abrasive roller 1, and γ1 is the angle of the rake face 1002 of the positive rake angle abrasive grains. Set the coordinates here as the machining starting point O4. Set the set laser scanning path in the control software of the scanning galvanometer system A10, and perform the machining of the first cutting edge of the first positive rake angle abrasive grain 100. After the machining of the first cutting edge is completed, the laser of the scanning galvanometer system A10 is turned off. The precision slide A9 together with the scanning galvanometer system A10 moves along the direction set on the X-axis to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O5. The laser beam processes the second cutting edge starting from the set O5 and along the set trajectory.

[0094] Step 2.2: After the machining of the two adjacent cutting edges of the positive rake angle abrasive grains 100 in Step 2.1 is completed, the precision slide A9 together with the scanning galvanometer system A10 moves along the direction set on the X-axis to the starting point O4 of Step 1.

[0095] Step 3: On the basis of Step 2, according to the number n of positive rake angle abrasive grains 100 designed, rotate the rotatable workbench A7 by 360° / n, and repeat Step 2 until all the positive rake angle abrasive grains 100 are processed.

[0096] Step 4: After all the positive rake angle abrasive grains 100 are processed in Step 3, the precision slide A9 together with the scanning galvanometer system A10 moves along the direction set on the X-axis to the starting point O4 of Step 1. According to the number n of negative rake angle abrasive grains 101 designed, rotate the rotatable workbench A7 by 180° / n, and process the adjacent cutting edges on a negative rake angle abrasive grain 101.

[0097] Step 4.1: Set the matching laser parameters such as the average laser power, repetition frequency, and scanning speed according to the designed angle γ2 of the flank face 1012 of the negative rake angle abrasive grain. Process adjacent cutting edges with a set angle on a negative rake angle abrasive grain 101 based on the laser beam emitted by the optical rotation module A4.

[0098] Step 4.2: The precision slide table A9 together with the scanning galvanometer system A10 moves along the set direction of the X-axis, and the moving distance is R×sin(γ2 - 90°), where R is the radius of the positive and negative rake angle superhard abrasive roller 1, and γ2 is the angle of the flank face 1012 of the negative rake angle abrasive grain. Set the coordinates here as the machining starting point O6. Set the set laser scanning path in the control software of the scanning galvanometer system A10 to process the first cutting edge of the first negative rake angle abrasive grain 101. After the processing of the first cutting edge is completed, the laser of the scanning galvanometer system A10 is turned off. The precision slide table A9 together with the scanning galvanometer system A10 moves along the set direction of the X-axis to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O7. The laser beam processes the second cutting edge with O7 as the starting point according to the set trajectory, and processes the rake face 1011 and the flank face 1012 of the negative rake angle abrasive grain of the negative rake angle abrasive grain 101 respectively.

[0099] Step 5: On the basis of Step 4, according to the designed number n of negative rake angle abrasive grains 101, each negative rake angle abrasive grain 101 is distributed alternately with each positive rake angle abrasive grain 100. Rotate the rotatable worktable A7 by 360° / n, and repeat Step 4 until all the negative rake angle abrasive grains 101 are processed.

[0100] In the present invention, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0101] The shapes of the various components in the drawings are schematic, and there is no exclusion of a certain difference from their actual shapes. The drawings are only used to illustrate the principle of the present invention and are not intended to limit the present invention.

[0102] Although the present invention has been disclosed in detail with reference to the drawings, it should be understood that these descriptions are merely exemplary and are not intended to limit the application of the present invention. The protection scope of the present invention is defined by the appended claims and may include various modifications, adaptations, and equivalent solutions made to the invention without departing from the protection scope and spirit of the present invention.

Claims

1. A superhard abrasive roller with positive and negative rake angles, characterized in that, The positive and negative rake angle super-hard abrasive roller (1) is installed on a super-hard abrasive roller processing device to process the blade; The positive and negative rake angle super-hard abrasive roller (1) comprises a plurality of super-hard abrasive particles (10) and a matrix; The super-hard abrasive particles (10) include first abrasive particles and second abrasive particles; The first abrasive particles and the second abrasive particles are alternately distributed on the edge of the substrate; The first abrasive grain and the second abrasive grain each have a plurality of cutting edges, the cutting edges have a designed angle, and the cutting edges are processed by laser; The first abrasive grain and the second abrasive grain each have a plurality of identical cutting edges, and a design angle of the cutting edge of the first abrasive grain is not the same as a design angle of the cutting edge of the second abrasive grain; The cutting edge of the first abrasive grain and the cutting edge of the second abrasive grain both include a rake face and a flank face; The first abrasive grain is a positive rake angle abrasive grain (100), and the second abrasive grain is a negative rake angle abrasive grain (101); the positive rake angle abrasive grain (100) comprises a positive rake angle abrasive grain cutting edge (1000), a positive rake angle abrasive grain flank face (1001), and a positive rake angle abrasive grain rake face (1002); the negative rake angle abrasive grain (101) comprises a negative rake angle abrasive grain cutting edge (1010), a negative rake angle abrasive grain rake face (1011), and a negative rake angle abrasive grain flank face (1012); the positive rake angle abrasive grain flank face (1001), the positive rake angle abrasive grain rake face (1002), the negative rake angle abrasive grain rake face (1011), and the negative rake angle abrasive grain flank face (1012) all have grinding surfaces; The positive rake angle abrasive grain flank face (1001) and the negative rake angle abrasive grain flank face (1011) constitute the positive and negative rake angles of the positive and negative rake angle super-hard abrasive roller (1) that are alternately ground in a clockwise manner; the positive rake angle abrasive grain flank face (1002) and the negative rake angle abrasive grain flank face (1012) constitute the positive and negative rake angles of the positive and negative rake angle super-hard abrasive roller (1) that are alternately ground in a counterclockwise manner.

2. The superabrasive roller with positive and negative rake angles according to claim 1, characterized in that, The cutting edge of the first abrasive grain is the positive rake angle abrasive grain cutting edge (1000), and the cutting edge of the second abrasive grain is the negative rake angle abrasive grain cutting edge (1010).

3. The superhard abrasive roller with positive and negative rake angles according to claim 1, wherein The substrate is a metal substrate (11); The metal substrate (11) is a circular structure with a thick middle and thin edges; The super-hard abrasive particle (10) has a cutting edge at one end thereof with an opening facing the outer side of a circumferential surface of an edge of the metal substrate (11); the end of the super-hard abrasive particle (10) opposite to the cutting edge is fixed to the circumferential surface of the edge of the metal substrate (11) by brazing or powder metallurgy.

4. A preparation method of a superhard abrasive roller with positive and negative rake angles, characterized in that, The positive and negative rake angle superhard abrasive roller (1) includes superhard abrasive grains (10) and a metal matrix (11); the superhard abrasive grains (10) include positive rake angle abrasive grains (100) and negative rake angle abrasive grains (101); the positive rake angle abrasive grains (100) include a positive rake angle abrasive grain edge (1000), a positive rake angle abrasive grain flank (1001), and a positive rake angle abrasive grain face (1002); the negative rake angle abrasive grains (101) include a negative rake angle abrasive grain edge (1010), a negative rake angle abrasive grain face (1011), and a negative rake angle abrasive grain flank (1012); the preparation method of the positive and negative rake angle superhard abrasive roller (1) includes: Step 1: Fix the superhard abrasive roller to be processed on a superhard abrasive roller rotary cutting laser processing device; Step 2: According to the designed width of the edge of the positive rake angle abrasive grain (100), set the matching numerical control interpolation path and laser parameters such as laser average power and repetition frequency, and process adjacent edges on one positive rake angle abrasive grain (100); Step 3: On the basis of Step 2, according to the designed number n of the positive rake angle abrasive grains (100), rotate the rotatable workbench 360° / n, and repeat Step 2 until all the positive rake angle abrasive grains (100) are processed; Step 4: After all the positive rake angle abrasive grains (100) are processed in Step 3, according to the designed number n of the negative rake angle abrasive grains (101), rotate the rotatable workbench 180° / n, and process adjacent edges on one negative rake angle abrasive grain (101); Step 5: On the basis of Step 4, according to the designed number n of the negative rake angle abrasive grains (101), with each negative rake angle abrasive grain (101) and each positive rake angle abrasive grain (100) distributed alternately, rotate the rotatable workbench 360° / n, and repeat Step 4 until all the negative rake angle abrasive grains (101) are processed.

5. The preparation method of the superhard abrasive roller with positive and negative rake angles according to claim 4, characterized in that, The processing of adjacent edges on one positive rake angle abrasive grain (100) in Step 2 specifically includes: Step 2.1: Process adjacent edges with a set angle on the positive rake angle abrasive grain (100) according to the laser beam emitted by the optical rotation module. The laser beam emitted by the optical rotation module starts from the highest point O1 recorded in Step 1 and processes along the set trajectory; after processing the first edge of the first positive rake angle abrasive grain (100), the precision slide table together with the optical rotation module moves to the highest point of the second edge, and the highest point of the second edge is recorded as O2. The laser beam starts from the set O2 and processes the second edge along the set trajectory; Step 2.2: After the two adjacent edges of the positive rake angle abrasive grain (100) in Step 2.1 are processed, the precision slide table together with the optical rotation module moves to the starting point O1 in Step 1.

6. The preparation method of the superhard abrasive roller with positive and negative rake angles according to claim 4, characterized in that The processing of adjacent edges on one negative rake angle abrasive grain (101) in Step 4 specifically includes: Step 4.1: According to the designed width of the edge of the negative rake angle abrasive grain (101), the laser parameter setting is the same as that in Step 2; Step 4.2: Process adjacent cutting edges with a set angle on the negative rake angle abrasive grains (101) according to the laser beam emitted from the optical rotation module. The laser beam starts from the highest point O1 recorded in Step 1 and processes along the set trajectory. After processing the first cutting edge of the first negative rake angle abrasive grain (101), the precision slide table together with the optical rotation module moves to the highest point of the second cutting edge, and the highest point of the second cutting edge is recorded as O3. The laser beam starts from the set O3 and processes the second cutting edge along the set trajectory, respectively processing the front tool face (1011) and the rear tool face (1012) of the negative rake angle abrasive grain (101).

7. The preparation method of the superhard abrasive roller with positive and negative rake angles according to any one of claims 4 to 6, characterized in that, The laser beam has three modes: negative taper laser beam, zero taper laser beam, and positive taper laser beam.

8. The preparation method of the superhard abrasive roller with positive and negative rake angles according to claim 7, characterized in that When processing one cutting edge of the positive rake angle abrasive grain (100) in Step 2, the initial laser beam uses a positive taper laser beam. When the positive taper laser beam moves from the coordinate origin to the middle position of the designed width of the cutting edge, it is switched to a negative taper laser beam until the processing is completed according to the set movement trajectory of the laser beam, respectively processing the rear tool face (1001) and the front tool face (1002) of the positive rake angle abrasive grain. When processing one cutting edge of the negative rake angle abrasive grain (101) in Step 4, the initial laser beam uses a negative taper laser beam. When the negative taper laser beam moves from the coordinate origin to the middle position of the designed width of the cutting edge, it is switched to a positive taper laser beam until the processing is completed according to the set movement trajectory of the laser beam, respectively processing the front tool face (1011) and the rear tool face (1012) of the negative rake angle abrasive grain.

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