Apparatus and method for synchronous laser-conformal and mechanical dressing of forming surface of diamond grinding tool

Abstract

An apparatus for synchronous laser-conformal and mechanical dressing of a forming surface of a diamond grinding tool, relating to the field of grinding tool dressing. The apparatus comprises Y-direction, X-direction, and Z-direction motion platforms configured to slide relative to one another. A laser head rotation shaft is vertically slidably arranged on the Z-direction motion platform, and a laser head is mounted on the laser head rotation shaft. A grinding tool rotation shaft is arranged on the Y-direction motion platform, a diamond grinding tool is arranged on the grinding tool rotation shaft, and a mechanical dressing mechanism is arranged on the Y-direction motion platform. The dressing method comprises: mounting the diamond grinding tool on the grinding tool rotation shaft, and adjusting the initial angle and position of the laser head; fine-tuning the relative position between the laser head and a forming surface of the diamond grinding tool and performing laser dressing; after the diamond grinding tool has rotated half a revolution, adjusting the position of a mechanical dressing wheel to begin mechanical dressing; and dressing the two sides of the forming surface of the diamond grinding tool respectively by means of mechanical dressing and laser dressing. The present invention achieves uniform removal and effective compensation for a concave-surface profile by laser, thereby improving the dressing accuracy and dressing efficiency of concave-surface diamond grinding tools.

Description

Device and method for laser contouring and mechanical synchronous dressing of diamond dresser forming surface

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411286261.4, filed on September 13, 2024, entitled “Device and method for laser contouring and mechanical synchronous dressing of diamond dresser forming surface”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of diamond dresser dressing, and particularly relates to a device and method for laser contouring and mechanical synchronous dressing of diamond dresser forming surface. BACKGROUND

[0004] In the entire process of form grinding, the key technology that determines the final workpiece grinding size accuracy and surface quality is the dressing of the forming tool. The concave circular arc radius in the concave surface profile shape requires to be as small as 100 μm, and the linear error is less than 4 μm. Forming processing is difficult, especially for concave surface diamond dressers. Diamond dressers are mainly divided into diamond rollers and diamond grinding wheels. Diamond grinding wheels directly grind workpieces, and diamond rollers grind ordinary grinding wheels, which in turn grind workpieces. With the continuous development of high-tech fields such as aerospace, energy, and optoelectronics, the profile precision and surface quality requirements of complex and functional core basic parts forming surfaces are becoming higher and higher. Therefore, it is of great significance to explore a precise, efficient, green, and low-cost dressing method for superhard abrasive forming rollers.

[0005] The essence of diamond tool dressing is to reshape the tool deeply. Reshaping refers to micro-cutting of the working surface of the tool to make the tool achieve the required geometric shape error and to make the tip of the abrasive grain micro-fracture to form a sharp cutting edge. At present, the widely used dressing methods in the tool dressing industry are mechanical dressing method, electrochemical processing method and laser dressing method. The mechanical method mainly includes turning dressing method, rolling dressing method, grinding dressing method, etc.; the electrochemical processing method mainly includes electrolytic dressing method, electric spark dressing method, etc. The dressing method has high dressing precision and great advantages for dressing convex surface tools. However, due to the large mechanical force between the dressing tool and the tool to be dressed, the dressing tool has the defects of large wear, low dressing efficiency, high dressing cost and difficult to guarantee the dressing precision of concave surface profile and complex profile tools. The electrochemical processing method is to remove the bond material between the metal bond tool and the tool electrode under the driving of high-frequency pulse power to make the abrasive grains of the tool effectively exposed, so as to achieve the purpose of dressing. Since the diamond abrasive grains are not conductive, the method mainly removes the bond material and cannot directly remove the diamond abrasive grains, which has the defects of narrow application range, unfriendly to equipment and environment (the medium such as electrolyte and grinding fluid used in dressing can easily cause equipment corrosion and environmental pollution) and the like. Laser dressing tool is a non-contact dressing method, which is a processing technology based on micro-area heat action. Laser dressing tool has many advantages: it can selectively remove abrasive grains or bond, has very high dressing efficiency and can easily obtain good topography; through the control of laser, high dressing precision can be obtained; it is a green processing technology, there is no problem of tool dulling and scrapping, and no dressing fluid is used; it is beneficial to prolong the service life of the tool and easy to realize automation; but the laser dressing method still has problems such as difficult to realize high-precision profile and good grinding cooperation with heat affected layer for concave surface dressing. At present, the application of concave surface diamond tool is greatly limited by dressing problem, and a single dressing method cannot meet the requirements of dressing precision and dressing efficiency. SUMMARY

[0006] The purpose of the present application is to provide a device and method for laser profiling and mechanical synchronous dressing of the forming surface of a diamond tool, which uses laser and mechanical synchronous shaping on both sides of the concave surface diamond tool. The laser removes a large amount of tool material, and the mechanical side synchronously removes the thermal damage layer caused by laser heat action. At the same time, the laser dressing path is adjusted according to the energy distribution of the profile surface of the tool, realizing uniform removal and effective compensation of the laser on the concave surface profile, so as to further improve the dressing precision and efficiency of the concave surface diamond tool.

[0007] The technical scheme adopted by the present application is:

[0008] The device for laser shaping and mechanical synchronous modification of the forming surface of diamond grinding tool comprises a Y-direction motion platform, an X-direction motion platform horizontally sliding on the Y-direction motion platform, a Z-direction motion platform horizontally sliding on the X-direction motion platform, a laser head rotating shaft vertically sliding on the Z-direction motion platform, and a laser head installed on the laser head rotating shaft.

[0009] A grinding tool rotating shaft is arranged on the Y-direction motion platform, and a diamond grinding tool is arranged on the grinding tool rotating shaft to complete the rotational motion of the diamond grinding tool.

[0010] A mechanical modification mechanism is arranged on the Y-direction motion platform.

[0011] The distance between the laser head and the diamond grinding tool in the left-right, front-back and up-down directions is adjusted through the Y-direction motion platform, the X-direction motion platform and the Z-direction motion platform respectively, and the angle of the laser head in the vertical plane is adjusted through the laser head rotating shaft to change the deflection angle of the laser beam.

[0012] Further, an auxiliary support is arranged on the Y-direction motion platform, the auxiliary support is in rotational sliding contact with the end of the diamond grinding tool, the grinding tool rotating shaft is supported, and the diamond grinding tool is prevented from being too heavy to bend the grinding tool rotating shaft 。

[0013] Further, the mechanical modification mechanism comprises a circular arc track arranged on the Y-direction motion platform and a circumferential rotating shaft, an S-direction motion platform is arranged on the circumferential rotating shaft, an R-direction motion platform is arranged on the S-direction motion platform, a modification wheel rotating shaft is installed on the R-direction motion platform, and a mechanical modification wheel is arranged on the modification wheel rotating shaft.

[0014] The entire mechanical modification mechanism makes circumferential rotational motion in the horizontal plane around the origin along the circular arc track, the included angle between the axial direction of the mechanical modification wheel and the axial direction of the diamond grinding tool is adjusted, and the distance between the mechanical modification wheel and the diamond grinding tool is adjusted by the S-direction motion platform and the R-direction motion platform together.

[0015] Further, a camera support frame is arranged on the Y-direction motion platform, and a CMOS camera is arranged on the camera support frame. The CMOS camera observes and records the modification state in real time.

[0016] All motion platforms, rotating shafts and other motion components use corresponding motors as power sources, which are not discussed in this invention.

[0017] The method for modifying the forming surface of the diamond grinding tool by using the device comprises the following steps:

[0018] Step one: install the diamond tool to be trimmed on the tool rotation shaft, and adjust the initial angle and position of the laser head, which requires the laser beam to act on the starting point of the profile of the diamond tool forming surface;

[0019] Step two: the tool rotation shaft drives the diamond tool to rotate, and the laser trimming of the diamond tool forming surface begins, while the relative position between the laser head and the diamond tool forming surface is adjusted in real time through the cooperation of the Y-direction motion platform, the X-direction motion platform, the Z-direction motion platform and the rotation shaft of the laser head;

[0020] When the diamond tool rotates half a circle, adjust the mechanical trimming wheel to the starting point of the profile of the diamond tool forming surface, and start the mechanical trimming of the diamond tool forming surface; during the mechanical trimming, the laser trimming continues; at the same time, the relative position between the mechanical trimming wheel and the diamond tool forming surface is adjusted in real time through the cooperation of the circumferential rotation shaft, the S-direction motion platform and the R-direction motion platform;

[0021] The mechanical trimming and the laser trimming trim the two sides of the diamond tool forming surface respectively, that is, the laser and the mechanical trimming process the material on the surface of the diamond tool on both sides at the same time.

[0022] Further, the diamond tool is a concave diamond tool (i.e. the forming surface is a concave surface), and the profile of the concave surface is composed of a straight line profile and a circular arc profile, the straight line profile is the bevel profile of the tool, and the circular arc profile can be regarded as a profile composed of multiple circular arc tangent lines, and each tangent line profile can be regarded as a bevel profile (i.e. reflected as a bevel profile on the tool).

[0023] Further, when the laser beam irradiates on the bevel profile, for different bevel profiles with different slopes, there are different degrees of dispersion of the spot area, and the effective spot area corresponds to the power density I A of the laser beam on the surface of the tool, and the power density determines whether the tool material can be effectively removed, and the power density I A is described as:

[0024] In the formula, R r is the reflectivity of the laser beam irradiated on the material, P avg is the average power of the output laser beam, f is the pulse frequency of the laser beam, τ is the pulse width of the laser beam, and S P is the laser spot area of the laser beam irradiated on the surface of the tool;

[0025] The rotation of the laser head deflects the laser beam, and after the laser beam is deflected, the reflectivity R r of the surface of the bevel profile changes, and the expression of the reflectivity R r and the incident angle β is represented as:

[0026] where k represents the refractive index after the laser beam is irradiated to the material; a represents the angle of the profile of the tool; A represents the distance between the origin of the coordinate axis O1-X1Y1Z1 established by the axis of the laser beam and the origin of the coordinate axis O-XYZ when the laser beam is deflected; R represents the radius of the tool; and θ represents the angle of deflection of the laser beam;

[0027] Meanwhile, the spot area of the deflected laser beam on the conical surface (referring to the equation of the profile of the tool) is represented by the following formula:

[0028] where r represents the radius of the cylindrical surface laser beam; x, y, and z represent the position parameters of the x-axis, y-axis, and z-axis, respectively; and δ represents the partial derivative;

[0029] The parameter z is calculated by formula (e):

[0030] where n(x, y), m(y), and a all represent intermediate variables;

[0031] z is a function of x and y, and the solving process is as follows:

[0032] When the laser beam is deflected, there is a deviation angle between the laser beam and the profile of the tool; when the positional relationship between the deflected laser beam and the profile of the tool is established, the axis of the laser beam is rotated by an angle θ around the Y-axis, at this time, the angle of the profile of the tool is a, and the coordinate axis established by the axis of the laser beam is O1-X1Y1Z1; the Y-axis is coincided with the Y1-axis, and the origin of the coordinate axis O1-X1Y1Z1 is apart from the origin of the coordinate axis O-XYZ by A, and then R-A is the cutting amount of the laser beam relative to the tool;

[0033] The laser beam with a certain Rayleigh length is approximately a cylindrical surface curve, and the cylindrical surface curve is rotated and translated to obtain:

[0034] The expression of the profile of the tool in the coordinate axis O1-X1Y1Z1 is as follows: x1 2 +(z1cosθ-y1sinθ) 2 -((y1cosθ+z1sinθ)cotα-R) 2 =0 (g)

[0035] The expression in the coordinate axis O1-X1Y1Z1 is represented again by the parameters in the coordinate axis O-XYZ (for facilitating computer modeling calculation), and the intersection line equation of the two profiles (the two profiles herein are the cylindrical surface laser beam and the conical surface of the tool, respectively) is as follows:

[0036] The conical surface equation in the coordinate axis O-XYZ is split as follows:

[0037] The following is obtained by substituting the equation:

[0038] The conical surface equation obtained is as follows: az 2 +2m(y)z=n(x,y) (l)

[0039] The relationship of z with x and y is obtained by equation (l).

[0040] The relationship between the effective energy density (power density) and the laser beam cutting depth (cutting amount), the laser beam deflection angle and the grinding wheel profile (grinding wheel bevel profile) angle is obtained, so that the size of the laser beam deflection angle is adjusted according to the change of the profile angle, so that the energy is uniform and the uniformity of the profile is ensured.

[0041] The beneficial effects of the present application are:

[0042] The present application provides a method and a device for simultaneously using laser and mechanical methods to profile the concave surface grinding wheel, using the laser profiled finishing method to realize the rapid removal of grinding wheel material, and simultaneously removing the thermal damage layer composed of diamond graphitization and binder thermal affected layer (heavy condensation broken material and thermal crack layer) by mechanical finishing. The laser profiled finishing method adjusts the laser deflection angle according to the specific shape of the grinding wheel, so as to adjust the effective energy density of the laser irradiation on the grinding wheel, so as to achieve the purpose of removing the error of the grinding wheel profile shape by the laser. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1-3 is a schematic diagram of the device of the present application as a whole;

[0044] Fig. 4 is a schematic diagram of the present application for removing the grinding wheel material;

[0045] Fig. 5 is a schematic diagram of the profile composition of the concave surface diamond grinding wheel according to the present application;

[0046] Fig. 6 is a schematic diagram of the dispersion of the laser beam by different bevel profiles according to the present application;

[0047] Fig. 7 is a schematic diagram of the relative position relationship between the laser beam and the bevel and the coordinate table according to the present application;

[0048] Fig. 1-3, 1, Y direction movement platform, 2, X direction movement platform, 3, Z direction movement platform, 4, laser head rotation axis, 5, laser head, 6, grinding tool rotation axis, 7, diamond grinding tool, 8, mechanical dressing mechanism, 801, circular arc track, 802, circumferential rotation axis, 803, S direction movement platform, 804, R direction movement platform, 805, dressing wheel rotation axis, 806, mechanical dressing wheel, 9, auxiliary support, 10, camera support, 11, CMOS camera. DETAILED DESCRIPTION

[0049] As shown in Fig. 1-3, a device for laser profiling and mechanical synchronous dressing of the forming surface of a diamond grinding tool, comprising a Y direction movement platform 1, an X direction movement platform 2 horizontally sliding on the Y direction movement platform 1, a Z direction movement platform 3 horizontally sliding on the X direction movement platform 2, a laser head rotation axis 4 vertically sliding on the Z direction movement platform 3, and a laser head 5 installed on the laser head rotation axis 4.

[0050] A grinding tool rotation axis 6 is provided on the Y direction movement platform 1, and a diamond grinding tool 7 is provided on the grinding tool rotation axis 6, completing the rotational movement of the diamond grinding tool 7.

[0051] A mechanical dressing mechanism 8 is provided on the Y direction movement platform 1.

[0052] The distance between the laser head 5 and the diamond grinding tool 7 in the left-right, front-back, and up-down directions is adjusted by the Y direction movement platform 1, the X direction movement platform 2, and the Z direction movement platform 3 respectively; the angle of the laser head 5 in the vertical plane is adjusted by the laser head rotation axis 4 to change the deflection angle of the laser beam.

[0053] An auxiliary support 9 is provided on the Y direction movement platform 1, which is in rotational sliding contact with the end of the diamond grinding tool 7, supporting the grinding tool rotation axis 6 and preventing the diamond grinding tool 7 from bending the grinding tool rotation axis 6 due to excessive weight. 。

[0054] The mechanical dressing mechanism 8 includes a circular arc track 801 provided on the Y direction movement platform 1 and a circumferential rotation axis 802, an S direction movement platform 803 provided on the circumferential rotation axis 802, an R direction movement platform 804 provided on the S direction movement platform 803, a dressing wheel rotation axis 805 installed on the R direction movement platform 804, and a mechanical dressing wheel 806 provided on the dressing wheel rotation axis 805.

[0055] The entire mechanical dressing mechanism 8 makes circumferential rotational movement in the horizontal plane along the circular arc track 801 around the origin, adjusting the included angle between the axial direction of the mechanical dressing wheel 806 and the axial direction of the diamond grinding tool 7; the S direction movement platform 803 and the R direction movement platform 804 together adjust the distance between the mechanical dressing wheel 806 and the diamond grinding tool 7.

[0056] A camera support frame 10 is arranged on the Y-direction motion platform 1, and a CMOS camera 11 is arranged on the camera support frame 10. The CMOS camera 11 observes and records the dressing state in real time.

[0057] All motion platforms, rotating shafts and other motion components are powered by corresponding motors, which are not discussed in the present application.

[0058] The method for dressing the forming surface of the diamond grinding tool by using the device comprises the following steps:

[0059] Step one: install the diamond grinding tool 7 to be dressed on the grinding tool rotating shaft 6, and adjust the initial angle and position of the laser head 5, which requires the laser beam to act on the starting point of the profile of the forming surface of the diamond grinding tool 7;

[0060] Step two: rotate the diamond grinding tool 7 by the grinding tool rotating shaft 6 to start laser dressing of the forming surface of the diamond grinding tool 7, and at the same time, real-time fine adjustment of the relative position between the laser head 5 and the forming surface of the diamond grinding tool 7 is performed by cooperation of the Y-direction motion platform 1, the X-direction motion platform 2, the Z-direction motion platform 3 and the laser head rotating shaft 4;

[0061] After the diamond grinding tool 7 rotates half a circle, adjust the mechanical dressing wheel 806 to the starting point of the profile of the forming surface of the diamond grinding tool 7, and start mechanical dressing of the forming surface of the diamond grinding tool 7; in the process of mechanical dressing, laser dressing continues; at the same time, real-time fine adjustment of the relative position between the mechanical dressing wheel 806 and the forming surface of the diamond grinding tool 7 is performed by cooperation of the circumferential rotating shaft 802, the S-direction motion platform 803 and the R-direction motion platform 804;

[0062] The mechanical dressing and the laser dressing dress the two sides of the forming surface of the diamond grinding tool 7, that is, the laser and the mechanical dressing simultaneously process the material on the surface of the diamond grinding tool on both sides.

[0063] As shown in FIG. 4, on one side of the forming surface of the diamond grinding tool 7, the laser angle is adjusted along with the change of the shape of the grinding tool from the starting point of the profile, thereby realizing large-amount dressing removal; at the same time of dressing, a damage layer is generated, which mainly includes a graphite layer of diamond and a heat-affected layer of binder, and the heat-affected layer is a re-solidified broken material and a thermal crack.

[0064] On the other side of the forming surface of the diamond grinding tool 7, the mechanical dressing with a delay of half a circle of grinding tool rotation also starts from the starting point of the profile, and immediately removes the damage layer formed due to the thermal action of the laser. Since the laser has a softening effect on the material, the wear of the mechanical dressing wheel is also minimized.

[0065] The diamond tool 7 is a concave diamond tool (i.e. the profile of the tool is concave), the profile of the concave is composed of straight line profile and circular arc profile, the straight line profile is the slope profile of the tool, and the circular arc profile can be regarded as a profile composed of multiple circular arc tangent lines, each tangent line profile can be regarded as a slope profile of the tool (i.e. reflected as a slope profile on the tool), as shown in Fig. 5.

[0066] As shown in Fig. 6, when the laser beam irradiates on the slope profile, for the slope profiles with different slopes, there are light spot areas with different dispersion degrees, and the effective light spot area corresponds to the power density I of the laser beam on the surface of the tool A , and the power density determines whether the tool material can be effectively removed, and the power density I A is described as:

[0067] In the formula, R r is the reflectivity of the laser beam irradiated on the material, P avg is the average power of the output laser beam, f is the pulse frequency of the laser beam, τ is the pulse width of the laser beam, S P is the laser spot area of the laser beam irradiated on the surface of the tool;

[0068] The rotation of the laser head 5 deflects the laser beam, and after the laser beam is deflected, the reflectivity R r of the surface of the slope profile changes, and the expression of the reflectivity R r and the incident angle β is expressed as:

[0069] In the formula, k represents the refractive index of the laser beam irradiated on the material; α represents the slope profile angle of the tool; A represents the distance between the origin of the coordinate axis O1-X1Y1Z1 established by the axis of the laser beam and the origin of the coordinate axis O-XYZ when the laser beam is deflected; R represents the radius of the tool; θ represents the deflection angle of the laser beam;

[0070] At the same time, the spot area of the deflected laser beam on the conical surface (referring to the slope equation of the tool) is expressed as:

[0071] In the formula, r represents the radius of the cylindrical laser beam; x, y, z respectively represent the position parameters of the x axis, y axis and z axis; δ represents the partial derivative;

[0072] The parameter z is calculated by formula (e):

[0073] In the formula, n(x, y), m(y) and a all represent intermediate variables;

[0074] z is a relationship with respect to x, y, and the solving process is:

[0075] When the laser beam is deflected, the laser beam and the tool flank surface profile have a deviation angle, and the relative position relationship therebetween is shown in Fig. 7; when the position relationship between the deflected laser beam and the tool flank surface profile is established, the laser beam axis is rotated by an angle θ about the Y axis, at this time the tool flank surface profile angle is α, and the coordinate axis established by the laser beam axis is O1-X1Y1Z1; the Y axis is coincided with the Y1 axis, then the origin of the coordinate axis O1-X1Y1Z1 is apart from the origin of the coordinate axis O-XYZ by A, and R-A is the cutting depth of the laser beam relative to the tool;

[0076] The laser beam with a certain Rayleigh length is approximately a cylindrical surface curve, and the cylindrical surface curve is rotated and translated to obtain:

[0077] The expression of the tool flank surface profile in the coordinate axis O1-X1Y1Z1 is as follows: x1 2 +(z1cosθ-y1sinθ) 2 -((y1cosθ+z1sinθ)cotα-R) 2 =0 (g)

[0078] The expression in the coordinate axis O1-X1Y1Z1 is represented by the parameters in the coordinate axis O-XYZ again (for facilitating computer modeling calculation), and the intersection line equation of the two profiles (the two profiles herein are the cylindrical laser beam and the conical surface of the tool respectively) is as follows:

[0079] The conical surface equation in the coordinate axis O-XYZ is split as follows:

[0080] The following formula is obtained by substitution:

[0081] The obtained conical surface equation is as follows: az 2 +2m(y)z=n(x,y) (l)

[0082] The relationship of z with x and y is obtained by formula (l).

[0083] The relationship between the effective energy density (power density) and the laser beam cutting depth (cutting depth), the laser beam deflection angle and the tool profile (tool flank surface profile) angle is obtained, so that the size of the laser beam deflection angle is adjusted according to the change of the profile angle, and the uniformity of the energy and the uniformity of the modified profile are ensured.

Claims

1. A device for laser profiling and mechanical synchronous dressing of a forming surface of a diamond tool, characterized in that, It comprises a Y-direction motion platform (1), an X-direction motion platform (2) horizontally sliding on the Y-direction motion platform (1), a Z-direction motion platform (3) horizontally sliding on the X-direction motion platform (2), a laser head rotating shaft (4) vertically sliding on the Z-direction motion platform (3), and a laser head (5) installed on the laser head rotating shaft (4); A grinding tool rotating shaft (6) is arranged on the Y-direction motion platform (1), and a diamond grinding tool (7) is arranged on the grinding tool rotating shaft (6); a mechanical dressing mechanism (8) is arranged on the Y-direction motion platform (1).

2. The apparatus for laser profiling and mechanical synchronous dressing of the shaped surface of a diamond tool as claimed in claim 1, wherein, An auxiliary support (9) is arranged on the Y-direction moving platform (1), and the auxiliary support (9) is in rotary sliding contact with the end of the diamond grinding tool (7) 。 3. The apparatus of claim 1, wherein the laser contouring and mechanical synchronous dressing of the shaped surface of the diamond tool is performed by a laser beam and a mechanical tool. The mechanical dressing mechanism (8) comprises a circular arc track (801) and a circumferential rotating shaft (802) arranged on the Y-direction motion platform (1), an S-direction motion platform (803) arranged on the circumferential rotating shaft (802), an R-direction motion platform (804) arranged on the S-direction motion platform (803), a dressing wheel rotating shaft (805) installed on the R-direction motion platform (804), and a mechanical dressing wheel (806) arranged on the dressing wheel rotating shaft (805).

4. The apparatus of claim 1, wherein the laser contouring and mechanical synchronous dressing of the shaped surface of the diamond tool is performed by a laser beam and a mechanical tool. A camera support frame (10) is arranged on the Y-direction motion platform (1), and a CMOS camera (11) is arranged on the camera support frame (10).

5. A method of dressing a forming surface of a diamond tool using the apparatus of any one of claims 1 to 4, characterised in that, It comprises the following steps: Step one: install the diamond grinding tool (7) to be dressed on the forming surface of the diamond grinding tool (7) to the grinding tool rotating shaft (6), and adjust the initial angle and position of the laser head (5), which requires the laser beam to act on the starting point of the profile of the forming surface of the diamond grinding tool (7); Step two: rotate the diamond grinding tool (7) by the grinding tool rotating shaft (6), and start to dress the forming surface of the diamond grinding tool (7) by laser, at the same time, real-time fine adjustment of the relative position between the laser head (5) and the forming surface of the diamond grinding tool (7) is realized through the cooperation of the Y-direction motion platform (1), the X-direction motion platform (2), the Z-direction motion platform (3) and the laser head rotating shaft (4); After the diamond grinding tool (7) rotates half a circle, adjust the mechanical dressing wheel (806) to the starting point of the profile of the forming surface of the diamond grinding tool (7), and start to dress the forming surface of the diamond grinding tool (7) by mechanical dressing; in the process of mechanical dressing, laser dressing continues; at the same time, real-time fine adjustment of the relative position between the mechanical dressing wheel (806) and the forming surface of the diamond grinding tool (7) is realized through the cooperation of the circumferential rotating shaft (802), the S-direction motion platform (803) and the R-direction motion platform (804); The mechanical dressing and the laser dressing dress the two sides of the forming surface of the diamond grinding tool (7) respectively.

6. The method of claim 5, wherein, The diamond grinding tool (7) is a concave diamond grinding tool, the profile of the concave surface is composed of a straight line profile and a circular arc profile, the straight line profile is the bevel profile of the grinding tool, and the circular arc profile can be regarded as a profile composed of multiple circular arc tangent lines, and each tangent line profile can be regarded as a bevel profile of the grinding tool.

7. The method of claim 6, wherein, The power density I of the laser beam impinging on the bevel profile A is described as: wherein R r is the reflectivity after the laser beam is irradiated to the material, P avg is the average power of the output laser beam, f is the pulse frequency of the laser beam, τ is the pulse width of the laser beam, S P is the laser spot area of the laser beam irradiated on the surface of the abrasive tool; The rotation of the laser head (5) causes the deflection of the laser beam, after which the reflectivity R r changes, the reflectivity R r The expression of the reflectivity R In the formula, k represents the refractive index after the laser beam irradiates to the material; a represents the angle of the tool slope profile; A represents the distance between the origin of the coordinate axis O1-X1Y1Z1 established by the axis of the laser beam and the origin of the coordinate axis O-XYZ when the laser beam is deflected; R represents the tool radius; and θ represents the deflection angle of the laser beam. Meanwhile, the spot area of the deflected laser beam on the conical surface is expressed by the following equation: In the formula, r represents the radius of the cylindrical laser beam; x, y, and z represent the position parameters of the x-axis, y-axis, and z-axis, respectively; and δ represents the partial derivative. The parameter z is calculated by equation (e): In the formula, n(x, y), m(y), and a all represent intermediate variables. z is a relational expression about x and y, and the solving process is as follows: When the laser beam is deflected, there is a deviation angle between the laser beam and the tool slope profile, and when the positional relationship between the deflected laser beam and the tool slope profile is established, the axis of the laser beam is rotated by an angle θ about the Y-axis, at this time, the angle of the tool slope profile is a, and the coordinate axis established by the axis of the laser beam is O1-X1Y1Z1; the Y-axis is coincided with the Y1-axis, and the origin of the coordinate axis O1-X1Y1Z1 is apart from the origin of the coordinate axis O-XYZ by A, so that R-A is the cutting amount of the laser beam relative to the tool; The laser beam with a certain Rayleigh length is approximately a cylindrical surface curve, and the cylindrical surface curve is transformed by rotation and translation to obtain: The expression of the tool slope profile in the coordinate axis O1-X1Y1Z1 is as follows: x1 2 + (z1cosθ - y1sinθ) 2 - ((y1cosθ + z1sinθ)cotα - R) 2 = 0 (g) The expressions in the coordinate axes O1-X1Y1Z1are again expressed in the parameters in the coordinate axes O-XYZ, and the intersection line equations of the two contours are as follows: The conic surface equation in the coordinate axis O-XYZ is split as follows: By replacing with the following equation, we get: The further obtained conical surface equation is as follows: az 2 + 2m(y)z = n(x, y) (1) The relational expression of z about x and y is obtained through formula (l).

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