Device and method for synchronously trimming forming surface of diamond grinding tool by laser shape following and machinery

Abstract

A device for synchronously trimming a forming surface of a diamond grinding tool through laser shape following and machinery belongs to the field of grinding tool trimming and comprises a Y-direction moving platform, an X-direction moving platform and a Z-direction moving platform which are arranged in a mutually sliding mode, a laser head rotating shaft is vertically arranged on the Z-direction moving platform in a sliding mode, and a laser head is installed on the laser head rotating shaft. A grinding tool rotating shaft is arranged on the Y-direction moving platform, a diamond grinding tool is arranged on the grinding tool rotating shaft, and a mechanical finishing mechanism is arranged on the Y-direction moving platform. The trimming method comprises the following steps: firstly, mounting a grinding tool on a grinding tool rotating shaft, and adjusting the initial angle and position of a laser head; finely adjusting the relative position of the laser head and the forming surface of the diamond grinding tool for laser finishing; after the diamond grinding tool rotates by half circle, the position of the mechanical finishing wheel is adjusted to start mechanical finishing; the mechanical finishing and the laser finishing are respectively used for finishing two sides of the forming surface of the diamond grinding tool. According to the invention, uniform removal and effective compensation of the concave surface contour by the laser are realized, and the finishing precision and finishing efficiency of the concave surface diamond grinding tool are improved.

Description

Technical Field

[0001] The invention belongs to the field of diamond grinding tool dressing, and particularly relates to a device and method for laser conformal and mechanical synchronous dressing of a diamond grinding tool forming surface. Background Art

[0002] In the entire process of forming grinding, the key technology that determines the final workpiece grinding dimensional accuracy and surface quality is the dressing of the forming abrasive tool. The radius of the concave arc in the concave surface contour shape is required to be as small as 100μm, and the linear error is less than 4μm. The forming process is difficult, especially for concave surface diamond abrasive tools. Diamond abrasive tools are mainly divided into diamond rollers and diamond grinding wheels. Diamond grinding wheels directly grind workpieces, diamond rollers grind ordinary grinding wheels, and ordinary grinding wheels grind workpieces again. With the continuous development of high-tech fields such as aerospace, energy, and optoelectronics, the contour accuracy and surface quality requirements for the forming surface processing of complex, functional core basic components are getting higher and higher. Therefore, it is of great significance to explore precise, efficient, green, and low-cost dressing methods for super-hard abrasive forming rollers.

[0003] The essence of diamond tool dressing is to deeply reshape the tool. Reshaping refers to the process of "cutting" the working surface of the tool slightly to make the tool reach the required geometric shape error and to finely break the tip of the abrasive grain to form a sharp edge. At present, the most widely used dressing methods in the tool dressing industry are mechanical dressing, electrical machining and laser dressing. Mechanical methods mainly include turning dressing, rolling dressing, grinding dressing, etc.; electrical machining methods mainly include electrolytic sharpening, electric spark dressing, etc. The dressing method has high dressing accuracy and has great advantages in dressing convex surface tools; due to the large mechanical force between the dressing tool and the dressed tool, there are defects such as large dressing tool loss, low dressing efficiency, high dressing cost, and difficulty in ensuring the dressing accuracy of concave surface contours and complex contour tools. The electro-machining method uses the electro-corrosion phenomenon of spark discharge between the metal-bonded abrasive tool and the tool electrode driven by a high-frequency pulse power supply to remove the binder material, so that the abrasive grains of the abrasive tool are effectively exposed, thereby achieving the purpose of dressing; since diamond abrasive grains are not conductive, this method mainly removes the binder material and cannot directly remove the diamond abrasive grains. It has the defects of narrow application range, unfriendly to equipment and environment (the electrolyte, grinding fluid and other media used in dressing are easy to cause equipment corrosion and environmental pollution). Laser dressing of abrasive tools, as a non-contact dressing method, is a processing technology based on micro-area thermal action. The use of laser to dress abrasive tools has many advantages: it can selectively remove abrasive grains or binders, the dressing efficiency is very high, and it is easy to obtain good terrain and topography; by controlling the laser, a higher dressing accuracy can be obtained; it is a green processing technology, there is no situation of passivation and scrapping of the dressing tool, and no dressing fluid is used; it is conducive to extending the service life of the abrasive tool and easy to realize automation; but at present, the laser dressing method for the dressing of concave surfaces still has problems such as high-precision contours are difficult to achieve and the heat-affected layer affects good grinding coordination. At present, the application of concave surface diamond grinding tools is greatly limited by the dressing problem, and it is urgent to solve the problem that a single dressing method cannot meet the current application requirements for dressing accuracy and dressing efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for laser conformal and mechanical synchronous dressing of a diamond grinding tool forming surface, which uses laser and mechanical synchronization to simultaneously perform shaping on both sides of a concave surface diamond grinding tool, the laser removes a large amount of material from the grinding tool, and the machine synchronously removes the thermal damage layer caused by the thermal effect of the laser on the other side; at the same time, the laser dressing path is adjusted according to the energy distribution of the contour shape surface of the grinding tool, so as to achieve uniform removal and effective compensation of the concave surface contour by the laser, thereby further improving the dressing accuracy and dressing efficiency of the concave surface diamond grinding tool.

[0005] The technical solution adopted by the present invention is:

[0006] A device for laser conformal and mechanical synchronous dressing of a diamond abrasive tool forming surface comprises a Y-direction motion platform, an X-direction motion platform is horizontally slidably arranged on the Y-direction motion platform, a Z-direction motion platform is horizontally slidably arranged on the X-direction motion platform, a laser head rotating shaft is vertically slidably arranged on the Z-direction motion platform, and a laser head is mounted on the laser head rotating shaft;

[0007] 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 rotation motion of the diamond grinding tool;

[0008] A mechanical trimming mechanism is provided on the Y-direction motion platform.

[0009] The distances between the laser head and the diamond tool in the left-right, front-back, and up-down directions are adjusted by the Y-direction motion platform, the X-direction motion platform, and the Z-direction motion platform respectively; the angle of the laser head in the vertical plane is adjusted by the laser head rotation axis to change the deflection angle of the laser beam.

[0010] Furthermore, an auxiliary support is provided on the Y-direction motion platform, and the auxiliary support is in rotational sliding contact with the end of the diamond grinding tool to support the grinding tool rotation axis to prevent the diamond grinding tool from being bent due to excessive weight.

[0011] Furthermore, the mechanical dressing mechanism includes an arc track and a circumferential rotating axis arranged on the Y-direction motion platform, an S-direction motion platform is provided on the circumferential rotating axis, an R-direction motion platform is provided on the S-direction motion platform, a dressing wheel rotating axis is installed on the R-direction motion platform, and a mechanical dressing wheel is provided on the dressing wheel rotating axis.

[0012] The entire mechanical dressing mechanism performs circumferential rotational motion around the origin in the horizontal plane along the circular track to adjust the angle between the axial direction of the mechanical dressing wheel and the axial direction of the diamond grinding tool; the S-direction motion platform and the R-direction motion platform together adjust the distance between the mechanical dressing wheel and the diamond grinding tool.

[0013] Furthermore, a camera support frame is provided on the Y-direction motion platform, and a CMOS camera is provided on the camera support frame. The CMOS camera observes and records the trimming status in real time.

[0014] All moving parts such as moving platforms and rotating shafts use corresponding motors as power sources, and these contents are not discussed in this invention.

[0015] The method for dressing the forming surface of a diamond grinding tool using the device comprises the following steps:

[0016] Step 1: Install the diamond abrasive tool with the forming surface to be trimmed on the abrasive tool rotating axis, and adjust the initial angle and position of the laser head. The initial angle and position of the laser head are the starting point for the laser beam to act on the contour of the diamond abrasive tool forming surface;

[0017] Step 2: The grinding tool rotating shaft drives the diamond grinding tool to rotate, and the laser trimming of the diamond grinding tool forming surface begins. At the same time, the relative position of the laser head and the diamond grinding tool forming surface is fine-tuned in real time through the cooperation of the Y-direction motion platform, the X-direction motion platform, the Z-direction motion platform and the laser head rotating shaft;

[0018] When the diamond tool rotates half a circle, the mechanical dressing wheel is adjusted to the starting point of the contour of the diamond tool forming surface, and the mechanical dressing of the diamond tool forming surface begins; during the mechanical dressing process, the laser dressing continues; at the same time, through the cooperation of the circumferential rotating axis, the S-direction motion platform and the R-direction motion platform, the relative position of the mechanical dressing wheel and the diamond tool forming surface is fine-tuned in real time;

[0019] Mechanical dressing and laser dressing respectively dress both sides of the diamond abrasive tool forming surface, that is, the laser and the machine process the material on the surface of the abrasive tool on both sides of the diamond abrasive tool at the same time.

[0020] Furthermore, the diamond grinding tool is a concave surface diamond grinding tool (i.e., the forming surface is a concave surface), and the contour of the concave surface is composed of a straight line contour and an arc contour. The straight line contour is the inclined surface contour of the grinding tool, and the arc contour can be regarded as a contour composed of multiple segments of arc tangents, and each segment of the tangent contour can be regarded as an inclined surface contour of the grinding tool (i.e., reflected as an inclined surface contour on the grinding tool).

[0021] Furthermore, when the laser beam is irradiated on the inclined surface profile, for inclined surface profiles with different slopes, there are corresponding spot areas with different dispersion degrees, and the effective spot area corresponds to the power density I of the laser beam on the surface of the mold. A , and the power density determines whether the abrasive material can be effectively removed. The power density I A Described as:

[0022]

[0023] In the formula, R r is the reflectivity of the laser beam after irradiating 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 It is the laser spot area irradiated by the laser beam on the surface of the mold;

[0024] The rotation of the laser head causes the laser beam to deflect. After the laser beam is deflected, the reflectivity R acting on the inclined surface is r changes, the reflectivity R r The expression for the incident angle β is:

[0025]

[0026] Wherein, k represents the refractive index of the material after the laser beam is irradiated; α represents the angle of the bevel profile of the mold; A represents the distance between the origin of the coordinate axis O1-X1Y1Z1 established with 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 mold; θ represents the deflection angle of the laser beam;

[0027] At the same time, the spot area of ​​the deflected laser beam on the conical surface (referring to the inclined surface equation of the mold) is expressed as follows:

[0028]

[0029] In the formula, r represents the radius of the cylindrical laser beam; x, y, z represent the position parameters of the x-axis, y-axis, and z-axis respectively; δ represents the partial derivative;

[0030] The parameter z is calculated by formula (e):

[0031]

[0032] In the formula, n(x,y), m(y) and a all represent intermediate variables;

[0033] z is the relationship between x and y, and the process of obtaining it is:

[0034] When the laser beam is deflected, there is a deviation angle between the laser beam and the bevel profile of the abrasive tool. When establishing the positional relationship between the deflected laser beam and the bevel profile of the abrasive tool, the axis of the laser beam is rotated around the Y axis by a certain angle θ. At this time, the bevel profile angle of the abrasive tool is α, and the coordinate axis established with the axis of the laser beam is O1-X1Y1Z1. When the Y axis coincides with the Y1 axis, the origin of the coordinate axis O1-X1Y1Z1 is at a distance A from the origin of the coordinate axis O-XYZ. Then RA is the cutting depth of the laser beam relative to the abrasive tool.

[0035] The laser beam with a certain Rayleigh length is approximately a cylindrical curve, and the cylindrical curve is rotated and translated to obtain:

[0036]

[0037] The expression of the contour of the abrasive tool bevel in the coordinate axis O1-X1Y1Z1 is as follows:

[0038] x1 2 +(z1cosθ-y1sinθ) 2 -((y1cosθ+z1sinθ)cotα-R) 2 =0 (g)

[0039] The expression in the coordinate axis O1-X1Y1Z1 is expressed again with the parameters in the coordinate axis O-XYZ (for the convenience of computer modeling and calculation), and the intersection line equation of the two contours (the two contours here are the cylindrical laser beam and the conical surface of the mold) is obtained as follows:

[0040]

[0041] The cone surface equation within the coordinate axis O-XYZ is decomposed into the following formula:

[0042]

[0043] Substitute the following formula to get:

[0044]

[0045] The resulting cone surface equation is as follows:

[0046] az 2 +2m(y)z=n(x,y) (l)

[0047] The relationship between z and x and y is obtained through formula (l).

[0048] In this way, the relationship between the effective energy density (power density) and the laser beam cutting depth (cutting depth), the laser beam deflection angle and the mold profile (mold bevel profile) angle is obtained, so that the laser beam deflection angle is adjusted according to the change of the profile angle to achieve energy uniformity and ensure the uniformity of the trimming profile.

[0049] Beneficial effects of the present invention:

[0050] The present invention proposes a method and a dressing device for performing conformal dressing on a concave surface abrasive tool by using both laser and mechanical methods. The laser conformal dressing method is used to achieve rapid removal of abrasive tool material, and the mechanical dressing is used to remove the heat damage layer composed of diamond graphitization and the heat-affected layer of the binder (recondensed broken material and thermal crack layer) generated by the laser. The laser conformal dressing method adjusts the laser deflection angle according to the specific shape of the abrasive tool, thereby adjusting the effective energy density of the laser irradiated on the abrasive tool, so as to achieve the purpose of effectively removing the error of the contour shape of the abrasive tool by the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 to Figure 3 It is an overall schematic diagram of the device of the present invention;

[0052] Figure 4 is a schematic diagram of material removal during the dressing of abrasive tools according to the present invention;

[0053] Figure 5 It is a schematic diagram of the outline composition of the concave surface diamond grinding tool of the present invention;

[0054] Figure 6 It is a schematic diagram of the dispersion of the laser beam by different inclined surface profiles of the present invention;

[0055] Figure 7 It is a schematic diagram of the relative position relationship and coordinate expression of the laser beam and the inclined plane of the present invention;

[0056] Figure 1 to Figure 3 Among them, 1. Y-direction motion platform, 2. X-direction motion platform, 3. Z-direction motion platform, 4. Laser head rotation axis, 5. Laser head, 6. Grinding tool rotation axis, 7. Diamond grinding tool, 8. Mechanical dressing mechanism, 801. Arc track, 802. Circumferential rotation axis, 803. S-direction motion platform, 804. R-direction motion platform, 805. Dressing wheel rotation axis, 806. Mechanical dressing wheel, 9. Auxiliary support, 10. Camera support frame, 11. CMOS camera. DETAILED DESCRIPTION

[0057] like Figure 1 to Figure 3 As shown, a device for laser conformal and mechanical synchronous dressing of diamond abrasive tool forming surface comprises a Y-direction motion platform 1, an X-direction motion platform 2 is horizontally slidably provided on the Y-direction motion platform 1, a Z-direction motion platform 3 is horizontally slidably provided on the X-direction motion platform 2, a laser head rotating shaft 4 is vertically slidably provided on the Z-direction motion platform 3, and a laser head 5 is installed on the laser head rotating shaft 4;

[0058] A grinding tool rotating shaft 6 is provided on the Y-direction motion platform 1, and a diamond grinding tool 7 is provided on the grinding tool rotating shaft 6 to complete the rotational motion of the diamond grinding tool 7;

[0059] A mechanical trimming mechanism 8 is provided on the Y-direction motion platform 1 .

[0060] The distances between the laser head 5 and the diamond grinder 7 in the left-right, front-back, and up-down directions are adjusted respectively by the Y-direction motion platform 1, the X-direction motion platform 2, and the Z-direction motion platform 3; 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.

[0061] An auxiliary support 9 is provided on the Y-direction motion platform 1. The auxiliary support 9 is in rotational sliding contact with the end of the diamond grinding tool 7 to support the grinding tool rotating shaft 6 to prevent the diamond grinding tool 7 from being overweight and bending the grinding tool rotating shaft 6.

[0062] The mechanical dressing mechanism 8 includes an arc track 801 and a circumferential rotating shaft 802 arranged on the Y-direction motion platform 1, an S-direction motion platform 803 is arranged on the circumferential rotating shaft 802, an R-direction motion platform 804 is arranged on the S-direction motion platform 803, a dressing wheel rotating shaft 805 is installed on the R-direction motion platform 804, and a mechanical dressing wheel 806 is arranged on the dressing wheel rotating shaft 805.

[0063] The entire mechanical dressing mechanism 8 performs circumferential rotational motion around the origin in the horizontal plane along the arc track 801 to adjust the angle between the axial direction of the mechanical dressing wheel 806 and the axial direction of the diamond grinding tool 7; the S-direction motion platform 803 and the R-direction motion platform 804 together adjust the distance between the mechanical dressing wheel 806 and the diamond grinding tool 7.

[0064] A camera support frame 10 is provided on the Y-direction motion platform 1, and a CMOS camera 11 is provided on the camera support frame 10. The CMOS camera 11 observes and records the trimming status in real time.

[0065] All moving parts such as moving platforms and rotating shafts use corresponding motors as power sources, and these contents are not discussed in this invention.

[0066] The method for dressing the forming surface of a diamond grinding tool using the device comprises the following steps:

[0067] Step 1: Install the diamond grinding tool 7 with the forming surface to be trimmed on the grinding tool rotating shaft 6, and adjust the initial angle and position of the laser head 5. The initial angle and position of the laser head 5 are the starting point for the laser beam to act on the contour of the forming surface of the diamond grinding tool 7;

[0068] Step 2: The grinding tool rotating shaft 6 drives the diamond grinding tool 7 to rotate, and the laser trimming of the forming surface of the diamond grinding tool 7 begins. At the same time, the relative position of the laser head 5 and the forming surface of the diamond grinding tool 7 is fine-tuned in real time 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;

[0069] When the diamond grinding tool 7 rotates half a circle, the mechanical dressing wheel 806 is adjusted to the starting point of the contour of the forming surface of the diamond grinding tool 7, and the forming surface of the diamond grinding tool 7 is mechanically dressed; during the mechanical dressing process, the laser dressing is continuously performed; at the same time, through the cooperation of the circumferential rotating shaft 802, the S-direction motion platform 803 and the R-direction motion platform 804, the relative position of the mechanical dressing wheel 806 and the forming surface of the diamond grinding tool 7 is finely adjusted in real time;

[0070] Mechanical dressing and laser dressing respectively dress both sides of the forming surface of the diamond grinding tool 7, that is, the laser and the machine process the material on the surface of the grinding tool on both sides of the diamond grinding tool at the same time.

[0071] like Figure 4 As shown, on one side of the forming surface of the diamond grinding tool 7, starting from the starting point of the contour, the laser angle is adjusted as the shape of the grinding tool changes, thereby achieving large-amount trimming and removal; a damaged layer is generated during the trimming, and the damaged layer mainly includes the graphite layer of the diamond and the heat-affected layer of the binder, and the heat-affected layer is recondensed broken material and thermal cracks.

[0072] On the other side of the forming surface of the diamond grinding tool 7, mechanical dressing with a delay of half a rotation of the grinding tool also starts from the starting point of the contour to immediately remove the damaged layer formed by the heat effect of the laser. Since the laser softens the material, the wear of the mechanical dressing wheel is also minimized.

[0073] The diamond grinding tool 7 is a concave surface diamond grinding tool (i.e., the forming surface is a concave surface). The contour of the concave surface is composed of a straight line contour and an arc contour. The straight line contour is the inclined surface contour of the grinding tool, and the arc contour can be regarded as a contour composed of multiple arc tangents. Each tangent contour can be regarded as an inclined surface contour of the grinding tool (i.e., it is reflected as an inclined surface contour on the grinding tool). Figure 5 shown.

[0074] like Figure 6 As shown, when the laser beam is irradiated on the inclined surface profile, for inclined surface profiles with different slopes, there are corresponding spot areas with different dispersion degrees. The effective spot area corresponds to the power density I of the laser beam on the surface of the mold. A , and the power density determines whether the abrasive material can be effectively removed. The power density I A Described as:

[0075]

[0076] In the formula, R r is the reflectivity of the laser beam after irradiating 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 It is the laser spot area irradiated by the laser beam on the surface of the mold;

[0077] The rotation of the laser head 5 causes the laser beam to deflect. After the laser beam is deflected, the reflectivity R acting on the inclined surface is r changes, the reflectivity R r The expression for the incident angle β is:

[0078]

[0079] Wherein, k represents the refractive index of the material after the laser beam is irradiated; α represents the angle of the bevel profile of the mold; A represents the distance between the origin of the coordinate axis O1-X1Y1Z1 established with 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 mold; θ represents the deflection angle of the laser beam;

[0080] At the same time, the spot area of ​​the deflected laser beam on the conical surface (referring to the inclined surface equation of the mold) is expressed as follows:

[0081]

[0082] In the formula, r represents the radius of the cylindrical laser beam; x, y, z represent the position parameters of the x-axis, y-axis, and z-axis respectively; δ represents the partial derivative;

[0083] The parameter z is calculated by formula (e):

[0084]

[0085] In the formula, n(x,y), m(y) and a all represent intermediate variables;

[0086] z is the relationship between x and y, and the process of obtaining it is:

[0087] When the laser beam is deflected, there is a deviation angle between the laser beam and the contour of the mold bevel. The relative position relationship between the two is as follows: Figure 7 As shown; when establishing the positional relationship between the deflected laser beam and the bevel profile of the abrasive tool, the laser beam axis is rotated around the Y axis by a certain angle θ. At this time, the bevel profile angle of the abrasive tool is α, and the coordinate axis established with the axis of the laser beam is O1-X1Y1Z1; the Y axis is coincident with the Y1 axis, then the origin of the coordinate axis O1-X1Y1Z1 is at a distance A from the origin of the coordinate axis O-XYZ, then RA is the cutting depth of the laser beam relative to the abrasive tool;

[0088] The laser beam with a certain Rayleigh length is approximately a cylindrical curve, and the cylindrical curve is rotated and translated to obtain:

[0089]

[0090] The expression of the contour of the abrasive tool bevel in the coordinate axis O1-X1Y1Z1 is as follows:

[0091] x1 2 +(z1cosθ-y1sinθ) 2 -((y1cosθ+z1sinθ)cotα-R) 2 =0 (g)

[0092] The expression in the coordinate axis O1-X1Y1Z1 is expressed again with the parameters in the coordinate axis O-XYZ (for the convenience of computer modeling and calculation), and the intersection line equation of the two contours (the two contours here are the cylindrical laser beam and the conical surface of the mold) is obtained as follows:

[0093]

[0094] The cone surface equation within the coordinate axis O-XYZ is decomposed into the following formula:

[0095]

[0096] Substitute the following formula to get:

[0097]

[0098] The resulting cone surface equation is as follows:

[0099] az 2 +2m(y)z=n(x,y) (l)

[0100] The relationship between z and x and y is obtained through formula (l).

[0101] In this way, the relationship between the effective energy density (power density) and the laser beam cutting depth (cutting depth), the laser beam deflection angle and the mold profile (mold bevel profile) angle is obtained, so that the laser beam deflection angle is adjusted according to the change of the profile angle to achieve energy uniformity and ensure the uniformity of the trimming profile.

Claims

1. A device for synchronously trimming the diamond grinding tool forming surface with laser conformation and mechanical modification. It is characterized in that The invention comprises a Y-direction motion platform (1), an X-direction motion platform (2) is horizontally slidably provided on the Y-direction motion platform (1), a Z-direction motion platform (3) is horizontally slidably provided on the X-direction motion platform (2), a laser head rotation axis (4) is vertically slidably provided on the Z-direction motion platform (3), and a laser head (5) is mounted on the laser head rotation axis (4); A grinding tool rotating shaft (6) is arranged on the Y-direction moving platform (1), and a diamond grinding tool (7) is arranged on the grinding tool rotating shaft (6); and a mechanical dressing mechanism (8) is arranged on the Y-direction moving platform (1).

2. The device for laser conformal and mechanical synchronous dressing of the diamond grinding tool forming surface as claimed in claim 1, It is characterized in that An auxiliary support (9) is provided on the Y-direction motion platform (1), and the auxiliary support (9) is in rotational sliding contact with the end of the diamond grinding tool (7).

3. The device for laser conformal and mechanical synchronous dressing of diamond grinding tool forming surface as claimed in claim 1, It is characterized in that The mechanical dressing mechanism (8) comprises an arc track (801) and a circumferential rotation axis (802) arranged on a Y-direction motion platform (1); an S-direction motion platform (803) is arranged on the circumferential rotation axis (802); an R-direction motion platform (804) is arranged on the S-direction motion platform (803); a dressing wheel rotating shaft (805) is installed on the R-direction motion platform (804); and a mechanical dressing wheel (806) is arranged on the dressing wheel rotating shaft (805).

4. The device for laser conformal and mechanical synchronous dressing of diamond grinding tool forming surface as claimed in claim 1, It is characterized in that A camera support frame (10) is provided on the Y-direction motion platform (1), and a CMOS camera (11) is provided on the camera support frame (10).

5. A method for dressing a diamond grinding tool forming surface using the device according to any one of claims 1 to 4, It is characterized in that The following steps are involved: Step 1: Mount the diamond grinding tool (7) whose forming surface is to be trimmed on the grinding tool rotating shaft (6), and adjust the initial angle and position of the laser head (5). The initial angle and position of the laser head (5) are the starting point for the laser beam to act on the contour of the forming surface of the diamond grinding tool (7); Step 2: The grinding tool rotating shaft (6) drives the diamond grinding tool (7) to rotate, and the laser trimming of the forming surface of the diamond grinding tool (7) begins. At the same time, the relative position of the laser head (5) and the forming surface of the diamond grinding tool (7) is fine-tuned in real time 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, the mechanical dressing wheel (806) is adjusted to the starting point of the contour of the forming surface of the diamond grinding tool (7), and the forming surface of the diamond grinding tool (7) is mechanically dressed; during the mechanical dressing process, the laser dressing is continuously performed; at the same time, the relative position of the mechanical dressing wheel (806) and the forming surface of the diamond grinding tool (7) is finely adjusted in real time through the cooperation of the circumferential rotating shaft (802), the S-direction motion platform (803) and the R-direction motion platform (804); Mechanical dressing and laser dressing respectively dress both sides of the forming surface of the diamond grinding tool (7).

6. The method according to claim 5, It is characterized in that The diamond grinding tool (7) is a concave surface diamond grinding tool, and the contour of the concave surface is composed of a straight line contour and an arc contour. The straight line contour is the inclined surface contour of the grinding tool, and the arc contour can be regarded as a contour composed of multiple arc tangents, and each tangent contour can be regarded as a inclined surface contour of the grinding tool.

7. The method according to claim 6, It is characterized in that The power density I of the laser beam irradiated on the slope profile A Described as: In the formula, R r is the reflectivity of the laser beam after irradiating 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 It is the laser spot area irradiated by the laser beam on the surface of the mold; The rotation of the laser head (5) causes the laser beam to deflect. After the laser beam is deflected, the reflectivity R acting on the inclined surface is r changes, the reflectivity R r The expression for the incident angle β is: Where k represents the refractive index of the material after the laser beam is irradiated; α represents the angle of the bevel profile of the mold; A represents the coordinate axis O established with the axis of the laser beam when the laser beam is deflected. 1 -X 1 Y 1 Z 1 The distance between the origin and the origin of the coordinate axis O-XYZ; R represents the radius of the mold; θ represents the deflection angle of the laser beam; At the same time, the spot area of ​​the deflected laser beam on the cone surface is expressed as follows: In the formula, r represents the radius of the cylindrical laser beam; x, y, z represent the position parameters of the x-axis, y-axis, and z-axis respectively; δ represents the partial derivative; The parameter z is calculated by formula (e): In the formula, n(x,y), m(y) and a all represent intermediate variables; z is the relationship between x and y, and the process of obtaining it is: When the laser beam is deflected, there is a deviation angle between the laser beam and the bevel profile of the mold. When establishing the positional relationship between the deflected laser beam and the bevel profile of the mold, the laser beam axis is rotated around the Y axis by a certain angle θ. At this time, the bevel profile angle of the mold is α, and the coordinate axis established with the axis of the laser beam is O 1 -X 1 Y 1 Z 1 ; Align the Y axis with the Y 1 The axes coincide, then the coordinate axis O 1 -X 1 Y 1 Z 1 The origin of the coordinate axis O-XYZ is at a distance of A, then RA is the cutting depth of the laser beam relative to the abrasive tool; The laser beam with a certain Rayleigh length is approximately a cylindrical curve, and the cylindrical curve is rotated and translated to obtain: Get the contour of the abrasive tool bevel on the coordinate axis O 1 -X 1 Y 1 Z 1 The expressions inside are as follows: x 1 2 +(z 1 cosθ-y 1 sinθ) 2 -((y 1 cosθ+z 1 sinθ)cotα-R) 2 =0 (g) The coordinate axis O 1 -X 1 Y 1 Z 1 The expression in is again expressed in terms of the parameters in the coordinate axis O-XYZ, and the equation of the intersection line of the two contours is obtained as follows: The cone surface equation within the coordinate axis O-XYZ is decomposed into the following formula: Substitute the following formula to get: The resulting cone surface equation is as follows: <h2 style=";text-align:left;direction:ltr">az<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> +2m(y)z=n(x,y) (l) The relationship between z and x and y is obtained through formula (l).

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