An automatic midpoint division implementation device and method for grinding allowance

Abstract

An embodiment of the present invention provides a device and method for automatically dividing the grinding allowance in half. During the grinding process of superhard tools, an image detection component installed on the tool rest assembly is used to detect the position images of the center of the rotating disk and the blade to be ground in real time. Through the movement and position analysis of the blade to be ground around the center of the rotating disk, the position of the center of the rotating disk is first found, and the error between the center of the rotating disk and the center of the arc of the tip of the blade to be ground is automatically identified and calculated. The alignment of the center of the rotating disk with the image detection center is achieved by controlling the movement of the first cross table. At the same time, the vertical distance between the center of the arc of the tip of the blade to be ground and the two straight edges of the tip of the blade to be ground is made equal to the radius of the arc of the tip of the blade to be ground, and the two straight edges are equally spaced and divided in half with respect to the rotation center of the rotating disk. In this way, it can be ensured that the arc of the tip of the blade to be ground is tangent to the straight edge and has a smooth transition, greatly ensuring the grinding accuracy of the arc of the tip of the blade.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of grinding machining of superhard tools, and particularly to a device and method for automatically bisecting grinding allowance. Background Art

[0002] After rough machining and semi-finishing of the blank, the machining allowance to be removed in the grinding machining process is left, which is called the grinding allowance. During the grinding process of superhard tools, the size of the grinding allowance greatly affects the size of the grinding wheel, thereby affecting the grinding accuracy. In order to ensure the grinding accuracy of the tool tip arc, the two straight edges and the arc of the tool tip should have a sufficiently small and uniform allowance. This requires the cross table to be able to reposition the blade automatically, and the rotation center of the cross table coincides with the center of the tool tip arc. Summary of the Invention

[0003] Therefore, the embodiments of the present invention provide a device and method for automatically bisecting grinding allowance to solve the technical problem of how to ensure the grinding accuracy of the tool tip arc during the grinding process of superhard tools.

[0004] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0005] According to the first aspect of the embodiments of the present invention, the embodiments of the present application provide a device for automatically bisecting grinding allowance, and the device includes:

[0006] A first base, which includes a first bearing body and a second bearing body;

[0007] A grinding assembly for grinding the blade to be ground, which is installed on the first bearing body through a first carriage;

[0008] A tool holder assembly for clamping the blade to be ground, which is installed on the second bearing body through a second carriage. A ring base and a rotating disk are provided on the upper surface of the second carriage, and the lower end of the rotating disk is rotatably sleeved in the central opening of the ring base;

[0009] An image detection assembly installed on the tool holder assembly through a column for detecting the position images of the center of the rotating disk and the blade to be ground;

[0010] An adjustment assembly for adjusting the center of the tool tip arc of the blade to be ground by using a first cross table. The first cross table is assembled to the rotating disk, and the tool holder assembly is installed on the first cross table;

[0011] A controller for controlling the movement of the adjustment assembly and the image detection assembly based on the image information output by the image detection assembly, and cooperating with the rotational movement of the rotating disk on the ring base to complete the grinding of the tool tip arc to be ground.

[0012] Further, the upper end surfaces of the first carrier body and the second carrier body are respectively provided with a first guide rail and a second guide rail, the first guide rail and the second guide rail are arranged perpendicular to each other, and the bottoms of the first carriage and the second carriage are respectively clamped on the first guide rail and the second guide rail.

[0013] Further, the grinding assembly includes: a box body frame, a main shaft and a grinding wheel. The box body frame is installed on the upper surface of the first carriage. An arc-shaped guide rail is arranged on the side of the box body frame close to the tool rest assembly. The main shaft is installed on the arc-shaped guide rail through a clamping plate. A first angle adjustment scale is arranged on the outer side surface of the arc-shaped guide rail. The grinding wheel is installed at the outer end of the main shaft.

[0014] Further, the first cross table includes: a second base, a third carriage and a fourth carriage; the upper end of the rotating disk is connected to the lower surface of one end of the second base. The bottom of the third carriage is clamped on the second base. The bottom of the fourth carriage is clamped on the third carriage. The third carriage and the fourth carriage are arranged perpendicular to each other.

[0015] Further, the tool rest assembly includes: a support frame and a clamping member. The bottom of the support frame is installed on the upper surface of the fourth carriage. The clamping member is assembled on the upper surface of the support frame. The clamping member clamps the blade to be ground on the side close to the grinding wheel.

[0016] Further, the second base accommodates the upper end of the rotating disk through a first assembly hole. A second assembly hole is opened on the upper surface of the second base at a position corresponding to the first assembly hole. The bottom of the first assembly hole is communicated with the second assembly hole through a positioning hole. Under the action of the positioning hole, the centers of the first assembly hole and the second assembly hole are coaxial.

[0017] Further, the image detection assembly includes: an image collector. The image collector is clamped on the perpendicularity adjustment vertical plate through a focal length adjustment vertical plate. The perpendicularity adjustment vertical plate is installed on the top of the column through a perpendicularity adjustment base. The lower end of the column is installed on the second carriage through a third base. The movement of the focal length adjustment vertical plate on the perpendicularity adjustment vertical plate is controlled by a focal length adjustment hand wheel.

[0018] Further, a light source, a protective mirror and an adjustment seat are installed in the second assembly hole. The light source is located in the adjustment seat and emits parallel light towards the image collector. The protective mirror is located above the light source and covers the upper part of the adjustment seat. The centers of the light source and the positioning hole are the same.

[0019] Further, a plug is installed at the top of the perpendicularity adjustment vertical plate. The plug can be rotatably inserted into the top groove of the vertical side plate of the perpendicularity adjustment base.

[0020] Further, a second cross workbench is also provided at the top of the column. The second cross workbench includes a transverse position adjustment slide, a longitudinal position adjustment slide, and a longitudinal position adjustment base plate. The bottom plate of the perpendicularity adjustment base is mounted on the transverse position adjustment slide, and the bottom of the transverse position adjustment slide is clamped on the longitudinal position adjustment slide. The transverse position adjustment slide is controlled to move on the longitudinal position adjustment slide by a transverse adjustment handwheel; the bottom of the longitudinal position adjustment slide is clamped on the longitudinal position adjustment base plate, and the longitudinal position adjustment slide is controlled to move on the longitudinal position adjustment base plate by a longitudinal adjustment handwheel. The longitudinal position adjustment base plate is mounted at the top of the column, and the transverse position adjustment slide and the longitudinal position adjustment slide are perpendicularly arranged.

[0021] Further, detecting the first adjustment parameter based on the first image includes:

[0022] Respectively extracting the first position coordinates (Xc1, Yc1) of the image detection center and the second position coordinates (Xc2, Yc2) of the rotation center of the rotating disk from the first image;

[0023] Calculating the first adjustment parameter by using the first position coordinates (Xc1, Yc1) and the second position coordinates (Xc2, Yc2). The calculation formula of the first adjustment parameter is:

[0024] Xa1 = Xc2 - Xc1

[0025] Ya1 = Yc2 - Yc1

[0026] Wherein, Xa1 is the transverse adjustment value of the first adjustment parameter, and Ya1 is the longitudinal adjustment value of the first adjustment parameter.

[0027] Further, detecting the second adjustment parameter of the image detection based on the second image includes:

[0028] Obtaining a set of sampling points from the second image based on the first pre-adjusted tool tip straight line and the second pre-adjusted tool tip straight line;

[0029] Using the position coordinates of each sampling point to construct the first parameter equation set, the second parameter equation set, the third parameter equation set, and the fourth parameter equation set corresponding to the first pre-adjusted tool tip straight line, the first target tool tip straight line, the second pre-adjusted tool tip straight line, and the second target tool tip straight line respectively;

[0030] Jointly solving each equation set to obtain the first intersection position coordinates (Xp1, Yp1) of the first pre-adjusted tool tip straight line and the second pre-adjusted tool tip straight line and the second intersection position coordinates (Xp2, Yp2) of the first target tool tip straight line and the second target tool tip straight line;

[0031] Calculate a second adjustment parameter using the first intersection point position coordinates (Xp1, Yp1) and the second intersection point position coordinates (Xp2, Yp2). The calculation formula for the second adjustment parameter is as follows:

[0032] Xa2 = Xp2 - Xp1

[0033] Ya2 = Yp2 - Yp1

[0034] Wherein, Xa2 is the horizontal adjustment value of the second adjustment parameter, and Ya2 is the vertical adjustment value of the second adjustment parameter.

[0035] According to the second aspect of the embodiments of the present invention, an embodiment of the present application provides a method for automatically dividing the grinding allowance in half. The method includes:

[0036] Return the tool holder assembly holding the blade to be ground to the initial position, and rotate the blade to drive the center into the image detection field of view;

[0037] Collect a first image of the center driven by the rotation of the blade;

[0038] Detect a first adjustment parameter based on the first image;

[0039] Adjust the image detection center to coincide with the center driven by the rotation of the blade based on the first adjustment parameter;

[0040] Adjust the grinding assembly to align with the blade to be ground;

[0041] Control the relative movement of the blade to be ground with respect to the grinding assembly, and perform primary grinding on the first pre-adjusted tip straight line and the second pre-adjusted tip straight line of the blade to be ground;

[0042] Collect a second image of the blade to be ground;

[0043] Detect a second adjustment parameter for image detection based on the second image;

[0044] Adjust the center of the tip arc to be ground to coincide with the image detection center based on the second adjustment parameter;

[0045] Control the rotation of the blade to be ground and grind the tip arc to be ground.

[0046] Compared with the prior art, an automatic midpoint division implementation device and method for grinding allowance provided by the embodiments of the present application can, during the grinding process of superhard tools, detect the position images of the center of the rotating disk and the blade to be ground in real time through an image detection component installed on the tool rest assembly. First, find the position of the center of the rotating disk, automatically identify and calculate the error between the center of the rotating disk and the center of the arc of the blade tip to be ground, and align the center of the rotating disk with the image detection center by controlling the movement of the first cross table. At the same time, make the vertical distance between the center of the arc of the blade tip to be ground and the two straight edges of the blade tip to be ground equal to the radius of the arc of the blade tip to be ground, and make the two straight edges equally spaced and midpoint divided with respect to the rotation center of the rotating disk, so as to ensure that the arc of the blade tip to be ground is tangent to the straight edge and has a smooth transition, greatly ensuring the grinding accuracy of the arc of the blade tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and those of ordinary skill in the art can also obtain other implementation drawings according to the provided drawings without creative efforts.

[0048] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0049] Figure 1 It is a schematic diagram of the overall structure of an automatic midpoint division implementation device for grinding allowance provided by an embodiment of the present invention;

[0050] Figure 2 It is a side view of an automatic midpoint division implementation device for grinding allowance provided by an embodiment of the present invention;

[0051] Figure 3 It is a schematic diagram of the control logic based on a controller in an automatic midpoint division implementation device for grinding allowance provided by an embodiment of the present invention;

[0052] Figure 4 It is a schematic diagram of the overall structure of the first cross table in an automatic midpoint division implementation device for grinding allowance provided by an embodiment of the present invention;

[0053] Figure 5 It is a side view of the first cross table in an automatic midpoint division implementation device for grinding allowance provided by an embodiment of the present invention;

[0054] Figure 6 Top view of the first cross table in an automatic midpoint division realization device for grinding allowance provided by an embodiment of the present invention;

[0055] Figure 7 For the first cross table in an automatic midpoint division realization device for grinding allowance provided by an embodiment of the present invention according to Figure 6 Longitudinal sectional view along the C-C line shown in;

[0056] Figure 8 Schematic structural diagram of the tool rest assembly, image detection assembly, and adjustment assembly in an automatic midpoint division realization device for grinding allowance provided by an embodiment of the present invention;

[0057] Figure 9 For an automatic midpoint division realization device for grinding allowance provided by an embodiment of the present invention according to Figure 8 Schematic diagram of the part of the tool tip to be ground as shown at I in;

[0058] Figure 10 Flowchart of an automatic midpoint division realization method for grinding allowance provided by an embodiment of the present invention;

[0059] Figure 11 Field of view diagram collected by the image collector when the center of the arc of the tool tip to be ground does not coincide with the image detection center in an embodiment of the present invention;

[0060] Figure 12 Field of view diagram collected by the image collector when the center of the arc of the tool tip to be ground coincides with the image detection center in an embodiment of the present invention;

[0061] Figure 13 Schematic principle diagram of detecting the second adjustment parameter based on the second image in image detection in an embodiment of the present invention.

[0062] Explanation of reference numerals in the drawings:

[0063] 01. First base; 02. Grinding assembly; 03. Tool rest assembly; 04. Image detection assembly; 05. Adjustment assembly; 06. Controller; 07. First bearing body; 08. Second bearing body; 09. First guide rail; 10. Second guide rail; 11. First carriage; 12. Box frame; 13. Spindle; 14. Grinding wheel; 15. Clamping plate; 16. Arc guide rail; 17. First angle adjustment scale; 18. Column; 19. Second carriage; 20. Ring base; 21. Rotary disk; 22. First cross table; 23. Second base; 24. Third carriage; 25. Fourth carriage; 26. Second motor; 27. Third motor; 28. Light source; 29. Rotary disk rotation center; 30. T-slot; 31. First assembly hole; 32. Positioning hole; 33. Second assembly hole; 34. Protective mirror; 35. Adjusting seat; 36. First lead screw; 37. First nut seat; 38. First elastic coupling; 39. First lead screw seat; 40. Second lead screw; 41. Fourth guide rail; 42. Image detection center; 43. Support frame; 44. Clamping member; 45. CCD camera; 46. Industrial microscope; 47. Focus adjustment handwheel; 48. Focus adjustment vertical plate; 49. Verticality adjustment vertical plate; 50. Verticality adjustment base; 51. Plug-in; 52. Groove; 53. Second cross table; 54. Lateral position adjustment carriage; 55. Longitudinal position adjustment carriage; 56. Longitudinal position adjustment base plate; 57. Lateral adjustment handwheel; 58. Longitudinal adjustment handwheel; 59. Third base; 60. Blade to be ground; 61. Tool tip arc to be ground; 62. First pre-adjusted tool tip straight line; 63. Second pre-adjusted tool tip straight line; 64. Tool tip arc center to be ground; 65. Image detection field of view dividing line; 66. Image detection field of view dividing center; 67. First motor; 68. First target tool tip straight line; 69. Second target tool tip straight line; 70. First foot point; 71. Second foot point; 72. First starting point; 73. First ending point; 74. Second starting point; 75. Second ending point; 76. First intersection point; 77. Second intersection point; 78. First perpendicular line; 79. Second perpendicular line; 80. Third foot point; 81. Fourth foot point. Detailed implementation manners

[0064] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of 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 belong to the scope of protection of the present invention.

[0065] The purpose of the embodiments of this application is to solve the technical problem of how to ensure the grinding accuracy of the tool tip arc during the grinding of superhard tools.

[0066] To solve the above technical problems, as Figure 1 and Figure 2 shown, the embodiment of the present application provides an automatic midpoint realization device for grinding allowance, specifically including: a first base 01, a grinding assembly 02, a tool rest assembly 03, an image detection assembly 04, and an adjustment assembly 05.

[0067] Further, the first base 01 includes a first bearing body 07 and a second bearing body 08 which are integrally provided. The first bearing body 07 and the second bearing body 08 are integrally provided, the first bearing body 07 and the second bearing body 08 are perpendicular to each other, and the second bearing body 08 intersects with the middle part of the first bearing body 07 to form a T shape. The upper end surfaces of the first bearing body 07 and the second bearing body 08 are respectively provided with a first guide rail 09 and a second guide rail 10, and the first guide rail 09 and the second guide rail 10 are perpendicularly arranged.

[0068] The grinding assembly 02 is used for grinding the blade to be ground 60, and is installed on the first bearing body 07 through a first carriage 11. The bottom of the first carriage 11 is clamped on the first guide rail 09. In the embodiment of the present application, the setting direction of the first guide rail 09 is the X axis, and the grinding assembly 02 moves along the first guide rail 09 driven by the first carriage 11.

[0069] Specifically, the grinding assembly 02 includes: a box frame 12, a main shaft 13, and a grinding wheel 14. The box frame 12 is installed on the upper surface of the first carriage 11. An arc guide rail 15 is provided on one side of the box frame 12 close to the tool rest assembly 03. The main shaft 13 is installed on the arc guide rail 15 through a clamping plate 16. The clamping plate 16 moves along the arc guide rail 15 under the action of an external force, so as to continuously adjust the pitching angle of the main shaft 13 and the grinding wheel 14 during the grinding process, and realize grinding the tip arc 61 of the blade to be ground to form a cutting edge. The outer side of the arc guide rail 15 is provided with a first angle adjustment scale for indicating the pitching angle adjustment value of the main shaft 13 and the grinding wheel 14. The grinding wheel 14 is installed at the outer end of the main shaft 13.

[0070] The tool rest assembly 03 is used for clamping the blade to be ground 60, and is installed on the second bearing body 08 through a second carriage 19. The bottom of the second carriage 19 is clamped on the second guide rail 10. In the embodiment of the present application, the setting direction of the second guide rail 10 is the Y axis, and the tool rest assembly 03 moves along the second guide rail 10 driven by the second carriage 19.

[0071] A ring base 20 and a rotating disk 21 are provided on the upper surface of the second carriage 19. The ring base 20 is installed on the upper surface of the second carriage 19, and the lower end of the rotating disk 21 can be rotatably sleeved in the central opening of the ring base 20. In the embodiment of the present application, the rotating disk 21 can be driven by a first motor 67, and the first motor 67 is in Figure 1The specific installation position is not shown in the figure. The first motor 67 can be installed below the upper end face of the second bearing body 08. The lower end of the rotating disk 21 passes through the upper end face of the second bearing body 08 and is connected to the output shaft of the first motor 67. In this way, during the grinding process, the first motor 67 drives the rotating disk 21 to rotate in the ring base 20, thereby driving the main shaft 13 and the grinding wheel 14 to rotate, and forming the arc of the tip of the blade to be ground 61 through grinding. In the embodiment of the present application, the rotation center 29 of the rotating disk can be referred to as the B axis. A second adjustment angle scale is provided on the upper surface of the ring base 20 for indicating the rotation angle of the main shaft 13 and the grinding wheel 14.

[0072] The adjustment assembly 05 uses the first cross table 22 to adjust the position of the center 64 of the arc of the tip of the blade to be ground 60 of the blade to be ground. The first cross table 22 is assembled to the rotating disk 21, and the tool holder assembly 03 is installed on the first cross table 22.

[0073] Reference Figures 4 to 6 , the first cross table 22 includes: a second base 23, a third carriage 24, and a fourth carriage 25; referring to Figure 1 and Figure 2 , the upper end of the rotating disk 21 is connected to the lower surface of one end of the second base 23. The bottom of the third carriage 24 is clamped on the second base 23, and the third carriage 24 is driven by the second motor 26 through the first transmission assembly to move on the second base 23. The bottom of the fourth carriage 25 is clamped on the third carriage 24, and the fourth carriage 25 is driven by the third motor 27 through the second transmission assembly to move on the third carriage 24; the third carriage 24 and the fourth carriage 25 are perpendicularly arranged. In the embodiment of the present application, the moving direction of the above-mentioned third carriage 24 on the second base 23 is referred to as the U-axis direction, and the moving direction of the above-mentioned fourth carriage 25 on the third carriage 24 is referred to as the V-axis direction.

[0074] In the embodiment of the present application, similar to the fact that the upper end faces of the first bearing body 07 and the second bearing body 08 are respectively provided with a first guide rail 09 and a second guide rail 10, a third guide rail ( Figures 4 to 6 not shown in the figure) is provided on the upper surface of the second base 23. The bottom of the third carriage 24 is clamped on the third guide rail, and the second motor 26 drives the third carriage 24 to move on the third guide rail through the first transmission assembly.

[0075] Similarly, referring to Figure 7 , a fourth guide rail 41 is provided on the upper surface of the third carriage 24. The bottom of the fourth carriage 25 is clamped on the fourth guide rail 41, and the third motor 27 drives the fourth carriage 25 to move on the fourth guide rail 41 through the second transmission assembly. The third guide rail and the fourth guide rail 41 are perpendicularly arranged, and the third guide rail and the fourth guide rail 41 are respectively parallel to the second guide rail 10 and the first guide rail 09.

[0076] Reference Figure 7, the first transmission assembly includes: a first lead screw 36, a first nut seat 37, a first elastic coupling 38, and a first lead screw seat 39. One end of the first lead screw 36 is connected to the output end of the second motor 26. A first elastic coupling 38 is sleeved on the end of the first lead screw 36 close to the second motor 26. A first lead screw seat 39 is sleeved on the part of the first lead screw 36 close to the first elastic coupling 38. Bearings are arranged at both ends of the first lead screw seat 39. A first nut seat 37 is sleeved on the end of the first lead screw 36 far from the second motor 26. A female thread meshing with the lead screw thread on the first lead screw 36 is arranged inside the first nut seat 37. The upper part of the first nut seat 37 is connected to the bottom of the third carriage 24. In this way, the second motor 26 drives the first lead screw 36 to rotate in the first nut seat 37. Through the meshing of the lead screw thread and the female thread, the third carriage 24 can be driven to move on the third guide rail.

[0077] Similarly, the second transmission assembly includes: a second lead screw 40, a second nut seat, a second elastic coupling, and a second lead screw seat. Figure 7 Only the second lead screw 40 is shown, but the installation relationship between the above-mentioned components of the second transmission assembly is the same as that between the above-mentioned components of the first transmission assembly. One end of the second lead screw 40 is connected to the output end of the third motor 27. A second elastic coupling is sleeved on the end of the second lead screw 40 close to the third motor 27. A second lead screw seat is sleeved on the part of the second lead screw 40 close to the second elastic coupling. Bearings are arranged at both ends of the second lead screw seat. A second nut seat is sleeved on the end of the second lead screw 40 far from the third motor 27. A female thread meshing with the lead screw thread on the second lead screw 40 is arranged inside the second nut seat. The upper part of the second nut seat is connected to the bottom of the fourth carriage 25. In this way, the third motor 27 drives the second lead screw 40 to rotate in the second nut seat. Through the meshing of the lead screw thread and the female thread, the fourth carriage 25 can be driven to move on the fourth guide rail 41.

[0078] Reference Figure 8 , the tool rest assembly 03 includes: a support frame 43 and a clamping member 44. The bottom of the support frame 43 is installed on the upper surface of the fourth carriage 25. The clamping member 44 is assembled on the upper surface of the support frame 43. The clamping member 44 clamps the blade 60 to be ground on the side close to the grinding wheel 14.

[0079] Specifically, a T-shaped groove 30 is provided on the upper surface of the fourth carriage 25. A screw hole is opened at the bottom of the T-shaped groove 30. The bottom of the support frame 43 is installed on the upper surface of the fourth carriage 25 through screws. The screws at the bottom of the support frame 43 pass through the screw holes and are fixed by nuts.

[0080] Reference Figure 8, one end of the second base 23 is provided with a first assembly hole 31 and a second assembly hole 33. The first assembly hole 31 is located below the second base 23. The second base 23 accommodates the upper end of the rotating disk 21 through the first assembly hole 31. A second assembly hole 33 is provided on the upper surface of the second base 23 at a position corresponding to the first assembly hole 31. The bottom of the first assembly hole 31 communicates with the second assembly hole 33 through a positioning hole 32. Under the action of the positioning hole 32, the centers of the first assembly hole 31 and the second assembly hole 33 are coaxial. The upper end of the rotating disk 21 is inserted into the first assembly hole 31 and the positioning hole 32, and the rotating disk 21 drives the first cross workbench 22 to rotate on the ring base 20.

[0081] Further, a light source 28, a protective mirror 34 and an adjustment base 35 are installed in the second assembly hole 33. The light source 28 is located in the adjustment base 35 and emits parallel light towards the image acquisition device. The protective mirror 34 is located above the light source 28 and covers the upper part of the adjustment base 35. The centers of the light source 28 and the positioning hole 32 are the same.

[0082] Reference Figure 8 , the image detection component 04 is installed on the tool rest component 03 through a column 18, and is used to detect the position images of the center of the rotating disk 21 and the blade 60 to be ground.

[0083] Further, the image detection component 04 includes: an image acquisition device. The image acquisition device is clamped on the verticality adjustment vertical plate 49 through a focal length adjustment vertical plate 48. The verticality adjustment vertical plate 49 is installed on the top of the column 18 through a verticality adjustment base 50. The lower end of the column 18 is installed on the second carriage 19 through a third base 59, and the movement of the focal length adjustment vertical plate 48 on the verticality adjustment vertical plate 49 is controlled by a focal length adjustment handwheel 47.

[0084] Similarly, the image acquisition device is installed on the focal length adjustment vertical plate 48. The focal length adjustment vertical plate 48 is clamped on a fifth guide rail (not shown in the figure) of the verticality adjustment vertical plate 49, and the movement of the focal length adjustment vertical plate 48 on the fifth guide rail is controlled by the focal length adjustment handwheel 47.

[0085] The image acquisition device specifically includes: a CCD camera 45 and an industrial microscope 46. The industrial microscope 46 is integrated with the CCD camera 45 and is placed below the CCD camera 45.

[0086] A plug-in 51 is installed at the top of the verticality adjustment vertical plate 49. The plug-in 51 can be rotatably inserted into the top groove 52 of the vertical side plate of the verticality adjustment base 50.

[0087] Further, a second cross workbench 53 is also provided at the top of the column 18. The second cross workbench 53 includes a transverse position adjustment slide 54, a longitudinal position adjustment slide 55, and a longitudinal position adjustment base plate 56. The bottom plate of the perpendicularity adjustment base 50 is mounted on the transverse position adjustment slide 54. The bottom of the transverse position adjustment slide 54 is clamped on the longitudinal position adjustment slide 55, and the transverse position adjustment slide 54 is controlled to move on the longitudinal position adjustment slide 55 by a transverse adjustment handwheel 57. The bottom of the longitudinal position adjustment slide 55 is clamped on the longitudinal position adjustment base plate 56, and the longitudinal position adjustment slide 55 is controlled to move on the longitudinal position adjustment base plate 56 by a longitudinal adjustment handwheel 58. The longitudinal position adjustment base plate 56 is mounted on the top of the column 18, and the transverse position adjustment slide 54 and the longitudinal position adjustment slide 55 are vertically arranged.

[0088] Similarly, a sixth guide rail is provided on the longitudinal position adjustment slide 55. The bottom of the transverse position adjustment slide 54 is clamped on the sixth guide rail (not shown in the figure), and the transverse position adjustment slide 54 is controlled to move on the sixth guide rail by a transverse adjustment handwheel 57. A seventh guide rail (not shown in the figure) is also provided on the longitudinal position adjustment base plate 56. The bottom of the longitudinal position adjustment slide 55 is clamped on the seventh guide rail, and the longitudinal position adjustment slide 55 is controlled to move on the seventh guide rail by a longitudinal adjustment handwheel 58.

[0089] Reference Figure 11 and Figure 12 In the embodiment of the present application, due to the high requirement for detection accuracy, the optical magnification of the industrial microscope is relatively high, resulting in a small image detection field of view. At the same time, since the optical distortion at the center of the field of view is the smallest, it is necessary to align the image detection field division center 66 with the rotation center of the turntable 29 (B-axis rotation center) through the transverse adjustment handwheel and the longitudinal adjustment handwheel. The function of the perpendicularity adjustment vertical plate 49 is to make the target surface of the CCD camera parallel to the B-axis rotation plane to eliminate the image change caused by rotation, and at the same time make the movement trajectory of the focal length adjustment vertical plate parallel to the optical path center. The optical path of the telecentric parallel light source also needs to be adjusted to be parallel to the optical path of the image detection to eliminate the influence of the light source. The ultimate goal is to improve the accuracy and stability of the image detection system as much as possible.

[0090] Reference Figure 3 In the embodiment of the present application, an automatic midpoint division device for grinding allowance further includes a controller 06. The input end of the controller 06 is connected to the output end of the image detection component 04, and the output end of the controller 06 is connected to the input ends of a first motor 67, a second motor 26, and a third motor 27. The controller 06 is used to control the movement of the adjustment component 05 and the image detection component 04 based on the image information output by the image detection component 04, and cooperate with the rotation movement of the turntable 21 on the ring base 20 to complete the grinding of the arc of the tip of the tool to be ground 61.

[0091] Reference Figure 9 In the embodiment of the present application, first, the verticality is manually adjusted to adjust the vertical plate 49, the lateral position is adjusted to adjust the carriage 54, and the longitudinal position is adjusted to adjust the carriage 55 to make the image detection center 42 coincide with the rotation center of the rotating disk 29 (B-axis rotation center). The arc of the tip to be ground 61 is ground based on the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 of the blade 60 to be ground. Due to the wear of the grinding wheel, there will be a deviation in the vertical distance between the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 and the rotation center of the rotating disk 29. The image detection assembly 04 detects the deviation of the vertical distance between the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 of the blade 60 to be ground and the image detection center. The controller 06 drives the two axes (U-axis and V-axis) of the first cross table to move corresponding distances according to the detected deviation, so that the center 64 of the arc of the tip to be ground coincides with the image detection center, that is, the center 64 of the arc of the tip to be ground coincides with the B-axis rotation center. At the same time, the vertical distance between the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 of the blade 60 to be ground and the center 64 of the arc of the tip to be ground is equal and equal to the radius of the arc of the tip to be ground 61. The B-axis is rotated to grind the arc of the tip to be ground 61, so that the size of the arc of the tip to be ground 61 can be guaranteed, and the arc of the tip to be ground 61 is tangent to the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 and the tangent points are smooth.

[0092] Compared with the prior art, a device for automatically dividing the grinding allowance provided by the embodiment of the present application, during the grinding process of the superhard tool, the image detection assembly installed on the tool rest assembly detects the position images of the center of the rotating disk and the blade to be ground in real time, first finds the position of the center of the rotating disk, automatically identifies and calculates the error between the center of the rotating disk and the center of the arc of the tip to be ground, and aligns the center of the rotating disk with the image detection center by controlling the movement of the first cross table. At the same time, the vertical distance between the center of the arc of the tip to be ground and the two straight edges of the tip to be ground is equal to the radius of the arc of the tip to be ground, so that the two straight edges are equally spaced and bisected with respect to the rotation center of the rotating disk, so that the arc of the tip to be ground and the straight edge are tangent and smoothly transition, which greatly guarantees the grinding accuracy of the tip arc.

[0093] Corresponding to the above-disclosed device for automatically dividing the grinding allowance, the embodiment of the present application also discloses a method for automatically dividing the grinding allowance. The following describes in detail the method for automatically dividing the grinding allowance disclosed in the embodiment of the present application in combination with the above-described device for automatically dividing the grinding allowance.

[0094] The following describes in detail the specific steps of the method for automatically dividing the grinding allowance provided by the embodiment of the present application.

[0095] A method for automatically achieving center division of grinding allowance provided by an embodiment of the present application is applied to an apparatus for automatically achieving center division of grinding allowance as described in any one of the above.

[0096] Refer to Figure 10 , a first base 01 is formed by a first bearing body 07 and a second bearing body 08; a grinding component 02 grinds a blade to be ground 60, and the grinding component 02 is mounted on the first bearing body 07 through a first cross slide 11; a tool holder component 03 clamps the blade to be ground 60, and the tool holder component 03 is mounted on the second bearing body 08 through a second cross slide 19. A ring base and a rotating disk are provided on the upper surface of the second cross slide 19. The ring base 20 is mounted on the upper surface of the second cross slide 19, and the lower end of the rotating disk 21 is rotatably sleeved in the central opening of the ring base 20; an adjustment component 05 uses a first cross table 22 to adjust the position of the center 64 of the arc of the tip of the blade to be ground 60. The first cross table 22 is assembled to the rotating disk 21, and the tool holder component 03 is mounted on the first cross table 22.

[0097] The controller 06 controls the movement of the rotating disk 21 and the adjustment component 05 to return the tool holder component 03 clamping the blade to be ground 60 to the initial position, so that the rotation of the blade drives the center into the image detection field of view.

[0098] Specifically, in the embodiment of the present application, when the above apparatus for automatically achieving center division of grinding allowance leaves the factory, corresponding initial positions are set for the rotation position of the rotating disk 21 and the positions of the third cross slide 24 and the fourth cross slide 25 of the adjustment component 05. The controller 06 controls the movement of the rotating disk 21 and the adjustment component 05 to return the tool holder component 03 clamping the blade to be ground 60 to the initial position. As described above, the controller 06 controls the rotation of the rotating disk 21 to make the second base 23 of the first cross table 22 parallel to the second cross slide 19. At this time, the rotating disk 21 rotates to the corresponding initial position. At this time, the controller 06 drives the third cross slide 24 and the fourth cross slide 25 to return to their respective corresponding initial positions by controlling the second motor 26 and the third motor 27 respectively. At this time, the rotation center 29 of the rotating disk enters the image detection field of view of the image detection component 04, and the rotation center 29 of the rotating disk is the center driven by the rotation of the blade.

[0099] The image detection component 04 acquires a first image of the center driven by the rotation of the blade.

[0100] Specifically, the controller 06 controls the image detection component 04 to collect the first image of the rotation center 29 of the rotating disk. As described above, a second assembly hole 33 is provided on the upper surface of the second base 23 at a position corresponding to the first assembly hole 31, and a light source 28 is installed in the second assembly hole 33. At this time, when the light source 28 is turned on, the light source 28 emits parallel light toward the image collector. At this time, the image detection component 04 is aligned with the rotating disk 21 to collect the first image, and the light spot of the parallel light emitted by the light source 28 will be displayed in the first image, and the center of the light spot is the rotation center 29 of the rotating disk.

[0101] The image detection component 04 detects the first adjustment parameter based on the first image.

[0102] Further, the above steps specifically include: respectively extracting the first position coordinates (Xc1, Yc1) of the image detection center 42 and the second position coordinates (Xc2, Yc2) of the rotation center 29 of the rotating disk from the first image; using the first position coordinates (Xc1, Yc1) and the second position coordinates (Xc2, Yc2) to calculate the first adjustment parameter, and the calculation formula of the first adjustment parameter is:

[0103] Xa1 = Xc2 - Xc1

[0104] Ya1 = Yc2 - Yc1

[0105] Wherein, Xa1 is the horizontal adjustment value of the first adjustment parameter, and Ya1 is the vertical adjustment value of the first adjustment parameter.

[0106] Based on the first adjustment parameter, adjust the image detection center 42 to coincide with the rotation driving center of the blade.

[0107] The above steps specifically include: controlling the horizontal position adjustment slide plate 54 to move on the sixth guide rail by the horizontal adjustment handwheel 57 by the horizontal adjustment value Xa1 of the first adjustment parameter, and controlling the vertical position adjustment slide plate 55 to move on the seventh guide rail by the vertical adjustment value Ya1 of the first adjustment parameter by the vertical adjustment handwheel 58. In this way, the image detection center 42 can be adjusted to coincide with the rotation driving center of the blade.

[0108] Further, after adjusting the image detection center 42 to coincide with the rotation driving center of the blade, a method for automatically dividing the grinding allowance disclosed in the embodiment of the present application further includes: adjusting the grinding component 02 to align with the blade 60 to be ground; and controlling the blade 60 to be ground to move relative to the grinding component 02 by the controller 06 to perform primary grinding on the first pre-adjusted tip straight line 62 and the second pre-adjusted tip straight line 63 of the blade 60 to be ground.

[0109] In the embodiment of the present application, as described above, the grinding assembly 02 is mounted on the first carrying body 07 through the first carriage 11, and the bottom of the first carriage 11 is clamped on the first guide rail 09. In this way, by adjusting the position of the first carriage 11 on the first carrying body 07, the grinding assembly 02 can be aligned with the blade 60 to be ground; further, by adjusting the first carriage 11 to move along the first guide rail 09, the grinding assembly 02 can be aligned with the blade 60 to be ground.

[0110] Before grinding the blade 60 to be ground, the two sides of the tool tip may be uneven and not straight. In this way, it is necessary to grind the two sides of the tool tip into regular straight lines through the above-mentioned primary grinding, that is, the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63. In the embodiment of the present application, the rotation disk 21 and the adjustment assembly 05 are mainly controlled by the controller 06 to move, driving the relative movement of the tool rest assembly 03 with respect to the grinding assembly 02, and performing primary grinding on the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63 of the blade 60 to be ground.

[0111] The image detection assembly 04 acquires the second image of the blade 60 to be ground. In the embodiment of the present application, the controller 06 controls the image detection assembly 04 to directly acquire the second image of the blade 60 to be ground.

[0112] The image detection assembly 04 detects the second adjustment parameter based on the second image.

[0113] Reference Figure 13 , in the embodiment of the present application, the above steps specifically include: obtaining a sampling point set from the second image based on the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63; using the position coordinates of each sampling point to construct the first parameter equation set, the second parameter equation set, the third parameter equation set, and the fourth parameter equation set corresponding to the first pre-adjusted tool tip straight line 62, the first target tool tip straight line 68, the second pre-adjusted tool tip straight line 63, and the second target tool tip straight line 69 respectively; jointly solving each equation set to obtain the first intersection position coordinates (Xp1, Yp1) of the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63 and the second intersection position coordinates (Xp2, Yp2) of the first target tool tip straight line 68 and the second target tool tip straight line 69; calculating the second adjustment parameter using the first intersection position coordinates (Xp1, Yp1) and the second intersection position coordinates (Xp2, Yp2), and the calculation formula of the second adjustment parameter is:

[0114] Xa2 = Xp2 - Xp1

[0115] Ya2 = Yp2 - Yp1

[0116] Wherein, Xa2 is the horizontal adjustment value of the second adjustment parameter, and Ya2 is the vertical adjustment value of the second adjustment parameter.

[0117] Further, the set of sampling points includes: the first foot point 70 of the image detection center 42 to the first pre-adjusted tool tip straight line 62, the second foot point 71 of the image detection center 42 to the second pre-adjusted tool tip straight line 63, the first starting point 72 and the first ending point 73 at the preset distance positions on both sides of the first foot point 70 on the first pre-adjusted tool tip straight line 62, and the second starting point 74 and the second ending point 75 at the preset distance positions on both sides of the second foot point 71 on the second pre-adjusted tool tip straight line 63. The position coordinates corresponding to the first foot point 70, the second foot point 71, the first starting point 72, the first ending point 73, the second starting point 74, and the second ending point 75 are respectively: the first foot point position coordinates (Xt1, Yt1), the second foot point position coordinates (Xt2, Yt2), the first starting point position coordinates (Xs1, Ys1), the first ending point position coordinates (Xe1, Ye1), the second starting point position coordinates (Xs2, Ys2), and the second ending point position coordinates (Xe2, Ye2).

[0118] As Figure 13 shown, the perpendicular line from the image detection center 42 to the first pre-adjusted tool tip straight line 62 and the first target tool tip straight line 68 is the first perpendicular line 78, and the perpendicular line from the image detection center 42 to the second pre-adjusted tool tip straight line 63 and the second target tool tip straight line 69 is the second perpendicular line 79. The intersection point of the first perpendicular line 78 and the first pre-adjusted tool tip straight line 62 is the first foot point 70, the intersection point of the first perpendicular line 78 and the first target tool tip straight line 68 is the third foot point 80, the intersection point of the second perpendicular line 79 and the second pre-adjusted tool tip straight line 63 is the second foot point 71, the intersection point of the second perpendicular line 79 and the second target tool tip straight line 69 is the fourth foot point 81. The third distance S1 between the image detection center 42 and the third foot point 80 is equal to the sixth distance S2 between the image detection center 42 and the fourth foot point 81, and both the third distance S1 and the sixth distance S2 are equal to the radius of the tool tip arc 61 to be ground. The first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63 are two straight lines of the tool tip of the blade to be ground before adjustment using the second adjustment parameter, and the first target tool tip straight line 68 and the second target tool tip straight line 69 are two straight lines of the tool tip of the blade to be ground after adjustment using the second adjustment parameter.

[0119] In the embodiment of the present application, based on the first starting point position coordinates (Xs1, Ys1), the first ending point position coordinates (Xe1, Ye1), and the first foot point position coordinates (Xt1, Yt1), a first parameter equation set of the first pre-adjusted tool tip straight line 68 and a second parameter equation set corresponding to the first target tool tip straight line 69 are established. The first parameter equation set is:

[0120] X1 = Xt1 + t1·(Xe1 - Xs1) / L1

[0121] Y1 = Yt1 + t1·(Ye1 - Ys1) / L1

[0122] Among them, t1 is the first parameter, X1 and Y1 are the abscissa and ordinate of the points on the first pre-adjusted tool tip straight line 68 respectively, L1 is the first distance between the first starting point 72 and the first ending point 73, and L1 = sqrt[(Xs1 - Xe1) 2 +(Ys1 - Ye1) 2 .

[0123] The second parameter equation system is as follows:

[0124] X2 = Xt11 + t11·(Xe1 - Xs1) / L1

[0125] Y2 = Yt11 + t11·(Ye1 - Ys1) / L1

[0126] Among them, t11 is the second parameter, X2 and Y2 are the abscissa and ordinate of the points on the first target tool tip straight line 69 respectively, Xt11 and Yt11 are the position coordinates of the third foot point corresponding to the third foot point 80 from the image detection center 42 to the first target tool tip straight line 69, L1 is the first distance between the first starting point 72 and the first ending point 73, and L1 = sqrt[(Xs1 - Xe1) 2 +(Ys1 - Ye1) 2 ;

[0127] Xt11 = F1·S1·Xt1 / Lt1

[0128] Yt11 = F1·S1·Yt1 / Lt1

[0129] Among them, F1 is the first unit vector direction indication value. When F1 meets the first preset condition, F1 takes 1. When F1 meets the second preset condition, F1 takes -1. The first preset condition is that the third parameter K1 is greater than 0, and the second preset condition is that the third parameter K1 is less than 0. K1 = (Xe1 - Xs1)·(0 - Ys1) - (Ye1 - Ys1)·(0 - Xs1), Lt1 is the second distance from the image detection center 42 to the first foot point 70, and Lt1 = sqrt[(Xt1) 2 +(Yt1) 2 , and S1 is the third distance from the image detection center 42 to the third foot point 80.

[0130] Based on the second starting point position coordinates (Xs2, Ys2), the second ending point position coordinates (Xe2, Ye2), and the second foot point position coordinates (Xt2, Yt2), establish the third parameter equation system of the second pre-adjusted tool tip straight line 69 and the fourth parameter equation system of the corresponding second target tool tip straight line 71. The third parameter equation system is as follows:

[0131] X3 = Xt2 + t2·(Xe2 - Xs2) / L2

[0132] Y3 = Yt2 + t2·(Ye2 - Ys2) / L2

[0133] Wherein, t2 is the fourth parameter, X3 and Y3 are respectively the abscissa and ordinate of the point on the second pre-adjusted tool tip straight line 63, L2 is the fourth distance between the second starting point 74 and the second ending point 75, and L2 = sqrt[(Xs2 - Xe2) 2 +(Ys2 - Ye2) 2 .

[0134] The fourth parameter equation set is as follows:

[0135] X4 = Xt22 + t22·(Xe2 - Xs2) / L2

[0136] Y4 = Yt22 + t22·(Ye2 - Ys2) / L2

[0137] Wherein, t22 is the fifth parameter, X4 and Y4 are respectively the abscissa and ordinate of the point on the second target tool tip straight line 69, Xt22 and Yt22 are the fourth foot point position coordinates corresponding to the fourth foot point 81 from the image detection center 42 to the second target tool tip straight line 69, L2 is the fourth distance between the second starting point 74 and the second ending point 75, and L2 = sqrt[(Xs2 - Xe2) 2 +(Ys2 - Ye2) 2 ;

[0138] Xt22 = F2·S2·Xt2 / Lt2

[0139] Yt22 = F2·S2·Yt2 / Lt2

[0140] Wherein, F2 is the second unit vector direction indication value. When F2 satisfies the third preset condition, F2 takes 1. When F2 satisfies the fourth preset condition, F2 takes -1. The third preset condition is that the sixth parameter K2 is greater than 0, and the fourth preset condition is that the sixth parameter K2 is less than 0. K2 = (Xe2 - Xs2)·(0 - Ys2) - (Ye2 - Ys2)·(0 - Xs2), Lt2 is the fifth distance from the image detection center 42 to the second foot point 71, and Lt2 = sqrt[(Xt2) 2 +(Yt2) 2 , and S2 is the sixth distance from the image detection center 42 to the fourth foot point 81.

[0141] The first simultaneous equation set is obtained by using the first parameter equation set and the third parameter equation set, and the second simultaneous equation set is obtained by using the second parameter equation set and the fourth parameter equation set.

[0142] Specifically, the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63 have a first intersection point 76. Taking the first intersection point position coordinates (Xp1, Yp1) corresponding to the first intersection point 76 as a condition, the first simultaneous equations can be obtained as follows:

[0143] Xt1 + t1·(Xe1 - Xs1) / L1 = Xt2 + t2·(Xe2 - Xs2) / L2

[0144] Yt1 + t1·(Ye1 - Ys1) / L1 = Yt2 + t2·(Ye2 - Ys2) / L2

[0145] Similarly, the first target tool tip straight line 68 and the second target tool tip straight line 69 have a second intersection point 77. Taking the second intersection point position coordinates (Xp2, Yp2) corresponding to the second intersection point 77 as a condition, the second simultaneous equations can be obtained as follows:

[0146] Xt11 + t11·(Xe1 - Xs1) / L1 = Xt22 + t22·(Xe2 - Xs2) / L2

[0147] Yt11 + t11·(Ye1 - Ys1) / L1 = Yt22 + t22·(Ye2 - Ys2) / L2

[0148] By solving the first simultaneous equations, the values of the first parameter and the fourth parameter are obtained, and by solving the second simultaneous equations, the values of the second parameter and the fifth parameter are respectively obtained.

[0149] Substitute the value of the first parameter into the first parameter equations to obtain the first intersection point position coordinates (Xp1, Yp1) of the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63. Or substitute the value of the fourth parameter into the third parameter equations to obtain the first intersection point position coordinates (Xp1, Yp1) of the first pre-adjusted tool tip straight line 62 and the second pre-adjusted tool tip straight line 63.

[0150] Similarly, substitute the value of the second parameter into the second parameter equations to obtain the second intersection point position coordinates (Xp2, Yp2) of the first target tool tip straight line 68 and the second target tool tip straight line 69. Or substitute the value of the fifth parameter into the fourth parameter equations to obtain the second intersection point position coordinates (Xp2, Yp2) of the first target tool tip straight line 68 and the second target tool tip straight line 69.

[0151] Calculate the second adjustment parameter using the first intersection point position coordinates (Xp1, Yp1) and the second intersection point position coordinates (Xp2, Yp2). The calculation formula for the second adjustment parameter is:

[0152] Xa2 = Xp2 - Xp1

[0153] Ya2 = Yp2 - Yp1

[0154] Among them, Xa2 is the horizontal adjustment value of the second adjustment parameter, and Ya2 is the vertical adjustment value of the second adjustment parameter.

[0155] The controller 06 controls the adjustment component 05 based on the second adjustment parameter, and uses the first cross table 22 to adjust the center 64 of the arc of the tip to be ground of the blade 60 to coincide with the image detection center 42.

[0156] As described above, the above steps specifically include: the controller 06 drives the second motor 26, and the third slide 24 is driven by the second motor 26 through the first transmission component to move on the second base 23 according to the horizontal adjustment value Xa2 of the second adjustment parameter. Similarly, the controller 06 drives the third motor 27, and the fourth slide 25 is driven by the third motor 27 through the second transmission component to move on the third slide 24 according to the vertical adjustment value Ya2 of the second adjustment parameter, so that the center 64 of the arc of the tip to be ground can be adjusted to coincide with the image detection center 42.

[0157] Control the rotation of the blade 60 to be ground to grind the arc 61 of the tip to be ground. Specifically, the controller 06 controls the rotating disk 21 to drive the tool holder assembly 03 and the blade 60 to be ground to rotate, and grind the arc 61 of the tip to be ground.

[0158] Compared with the prior art, a method for automatically dividing the grinding allowance provided by the embodiment of the present application, during the grinding process of the superhard tool, through the image detection component installed on the tool holder assembly, the position images of the center of the rotating disk and the blade to be ground are detected in real time. First, find the position of the center of the rotating disk, automatically identify and calculate the error between the center of the rotating disk and the center of the arc of the tip to be ground, and align the center of the rotating disk with the image detection center by controlling the movement of the first cross table. At the same time, make the vertical distance between the center of the arc of the tip to be ground and the two straight edges of the tip to be ground equal to the radius of the arc of the tip to be ground, and make the two straight edges equidistant and divided in the middle with respect to the rotation center of the rotating disk, so as to ensure that the arc of the tip to be ground is tangent to the straight edge and has a smooth transition, greatly ensuring the grinding accuracy of the tip arc.

[0159] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. An automatic midpoint division device for grinding allowance, characterized in that The device includes: A first base, which includes: a first bearing body and a second bearing body; A grinding assembly for grinding the blade to be ground, which is installed on the first bearing body through a first carriage; A tool holder assembly for clamping the blade to be ground, which is installed on the second bearing body through a second carriage. A ring base and a rotating disk are provided on the upper surface of the second carriage, and the lower end of the rotating disk is rotatably sleeved in the central opening of the ring base; An adjustment assembly for adjusting the center of the arc of the cutting edge to be ground of the blade to be ground by using a first cross table. The first cross table is assembled to the rotating disk, and the tool holder assembly is installed on the first cross table; A controller for controlling the movement of the rotating disk and the adjustment assembly, returning the tool holder assembly clamping the blade to be ground to the initial position, and making the center of the blade rotation drive enter the image detection field of view; An image detection assembly for collecting a first image of the center of the blade rotation drive; detecting a first adjustment parameter based on the first image; adjusting the image detection center to coincide with the center of the blade rotation drive based on the first adjustment parameter; collecting a second image of the blade to be ground; detecting a second adjustment parameter of the image detection based on the second image; The controller controls the adjustment assembly based on the second adjustment parameter, uses the first cross table to adjust the center of the arc of the cutting edge to be ground of the blade to be ground to coincide with the image detection center; and controls the rotating disk to drive the tool holder assembly and the blade to be ground to rotate, and grind the arc of the cutting edge to be ground; Among them, detecting the second adjustment parameter of the image detection based on the second image includes: Obtaining a set of sampling points from the second image based on a first pre-adjusted cutting edge straight line and a second pre-adjusted cutting edge straight line; the set of sampling points includes: a first foot point from the image detection center to the first pre-adjusted cutting edge straight line, a second foot point from the image detection center to the second pre-adjusted cutting edge straight line, a first starting point and a first ending point at preset distance positions on both sides of the first foot point on the first pre-adjusted cutting edge straight line, and a second starting point and a second ending point at preset distance positions on both sides of the second foot point on the second pre-adjusted cutting edge straight line; Using the position coordinates of each sampling point to construct a first parameter equation set, a second parameter equation set, a third parameter equation set, and a fourth parameter equation set corresponding to the first pre-adjusted cutting edge straight line, the first target cutting edge straight line, the second pre-adjusted cutting edge straight line, and the second target cutting edge straight line respectively; The first parameter equation set is: X1 = Xt1 + t1·(Xe1 - Xs1) / L1 Y1 = Yt1 + t1·(Ye1 - Ys1) / L1 Where, t1 is the first parameter, X1 and Y1 are the abscissa and ordinate of the point on the first pre-adjusted cutting edge straight line respectively, L1 is the first distance between the first starting point and the first ending point, Xs1 and Ys1 are the position coordinates of the first starting point, Xe1 and Ye1 are the position coordinates of the first ending point, and Xt1 and Yt1 are the position coordinates of the first foot point; The second parameter equation set is: X2 = Xt11 + t11·(Xe1 - Xs1) / L1 Y2 = Yt11 + t11·(Ye1 - Ys1) / L1 Wherein, t11 is the second parameter, X2 and Y2 are respectively the abscissa and ordinate of a point on the first target tool tip straight line, and Xt11 and Yt11 are the position coordinates of the third foot point corresponding to the third foot point from the image detection center to the first target tool tip straight line; Xt11 = F1·S1·Xt1 / Lt1 Yt11 = F1·S1·Yt1 / Lt1 Among them, F1 is the indication value of the first unit vector direction. When F1 meets the first preset condition, F1 takes 1. When F1 meets the second preset condition, F1 takes -1. The first preset condition is that the third parameter K1 is greater than 0, and the second preset condition is that the third parameter K1 is less than 0. K1 = (Xe1 - Xs1)·(0 - Ys1) - (Ye1 - Ys1)·(0 - Xs1), Lt1 is the second distance between the image detection center and the first foot point, Lt1 = sqrt[(Xt1) 2 +(Yt1) 2 , S1 is the third distance between the image detection center and the third foot point; The third parameter equation set is: X3 = Xt2 + t2·(Xe2 - Xs2) / L2 Y3 = Yt2 + t2·(Ye2 - Ys2) / L2 Wherein, t2 is the fourth parameter, X3 and Y3 are respectively the abscissa and ordinate of a point on the second pre-adjusted tool tip straight line, L2 is the fourth distance between the second starting point and the second ending point, Xt2 and Yt2 are the position coordinates of the second foot point, Xs2 and Ys2 are the position coordinates of the second starting point, and Xe2 and Ye2 are the position coordinates of the second ending point; The fourth parameter equation set is: X4 = Xt22 + t22·(Xe2 - Xs2) / L2 Y4 = Yt22 + t22·(Ye2 - Ys2) / L2 Wherein, t22 is the fifth parameter, X4 and Y4 are respectively the abscissa and ordinate of a point on the second target tool tip straight line, and Xt22 and Yt22 are the position coordinates of the fourth foot point corresponding to the fourth foot point from the image detection center to the second target tool tip straight line; Xt22 = F2·S2·Xt2 / Lt2 Yt22 = F2·S2·Yt2 / Lt2 Among them, F2 is the second unit vector direction indication value. When F2 meets the third preset condition, F2 takes 1. When F2 meets the fourth preset condition, F2 takes -1. The third preset condition is that the sixth parameter K2 is greater than 0, and the fourth preset condition is that the sixth parameter K2 is less than 0. K2 = (Xe2 - Xs2)·(0 - Ys2) - (Ye2 - Ys2)·(0 - Xs2). Lt2 is the fifth distance between the image detection center and the second foot point. Lt2 = sqrt[(Xt2) 2 +(Yt2) 2 , and S2 is the sixth distance between the image detection center and the fourth foot point; By jointly solving each equation set, the position coordinates (Xp1, Yp1) of the first intersection point of the first pre-adjusted tool tip straight line and the second pre-adjusted tool tip straight line and the position coordinates (Xp2, Yp2) of the second intersection point of the first target tool tip straight line and the second target tool tip straight line are obtained; Using the position coordinates (Xp1, Yp1) of the first intersection point and the position coordinates (Xp2, Yp2) of the second intersection point to calculate the second adjustment parameter, and the calculation formula of the second adjustment parameter is: Xa2 = Xp2 - Xp1 Ya2 = Yp2 - Yp1 Wherein, Xa2 is the horizontal adjustment value of the second adjustment parameter, and Ya2 is the vertical adjustment value of the second adjustment parameter.

2. The automatic midpoint dividing device for grinding allowance according to claim 1, characterized in that, The upper end surfaces of the first load-bearing body and the second load-bearing body are respectively provided with a first guide rail and a second guide rail, the first guide rail and the second guide rail are arranged perpendicular to each other, and the bottoms of the first carriage and the second carriage are respectively clamped on the first guide rail and the second guide rail.

3. The automatic midpoint division implementation device for grinding allowance according to claim 2, characterized in that The first cross table includes: a second base, a third carriage, and a fourth carriage; the upper end of the rotating disk is connected to the lower surface of one end of the second base, the bottom of the third carriage is clamped on the second base, the bottom of the fourth carriage is clamped on the third carriage, and the third carriage and the fourth carriage are arranged perpendicular to each other.

4. The automatic midpoint dividing device for grinding allowance as described in claim 3, characterized in that, The second base accommodates the upper end of the rotating disk through a first assembly hole, a second assembly hole is opened on the upper surface of the second base at a position corresponding to the first assembly hole, the bottom of the first assembly hole is communicated with the second assembly hole through a positioning hole, and under the action of the positioning hole, the centers of the first assembly hole and the second assembly hole are coaxial.

5. The automatic midpoint dividing device for grinding allowance as described in claim 4, wherein The image detection component includes: an image collector, which is clamped to the verticality adjustment vertical plate through a focal length adjustment vertical plate. The verticality adjustment vertical plate is installed on the top of the column through a verticality adjustment base. The lower end of the column is installed on the second carriage through a third base. The focal length adjustment vertical plate is controlled to move on the verticality adjustment vertical plate by a focal length adjustment handwheel.

6. The automatic midpoint dividing device for grinding allowance as claimed in claim 5, wherein, A light source, a protective mirror and an adjustment seat are installed in the second assembly hole. The light source is located in the adjustment seat and emits parallel light towards the image collector. The protective mirror is located above the light source and covers the upper part of the adjustment seat. The centers of the light source and the positioning hole are the same.

7. The automatic midpoint dividing device for grinding allowance according to claim 6, characterized in that, A second cross workbench is further provided at the top of the column. The second cross workbench includes: a lateral position adjustment carriage, a longitudinal position adjustment carriage, and a longitudinal position adjustment base plate. The bottom plate of the verticality adjustment base is installed on the upper surface of the lateral position adjustment carriage. The bottom of the lateral position adjustment carriage is clamped on the upper surface of the longitudinal position adjustment carriage. The lateral position adjustment carriage is controlled to move on the longitudinal position adjustment carriage by a lateral adjustment handwheel. The bottom of the longitudinal position adjustment carriage is clamped on the upper surface of the longitudinal position adjustment base plate. The longitudinal position adjustment carriage is controlled to move on the longitudinal position adjustment base plate by a longitudinal adjustment handwheel. The longitudinal position adjustment base plate is installed at the top of the column. The lateral position adjustment carriage and the longitudinal position adjustment carriage are vertically arranged.

8. The automatic midpoint dividing device for grinding allowance as described in claim 7, characterized in that, Based on the first image, the first adjustment parameter includes: Respectively extract the first position coordinates (Xc1, Yc1) of the image detection center and the second position coordinates (Xc2, Yc2) of the rotation center of the rotating disk from the first image; Calculate the first adjustment parameter by using the first position coordinates (Xc1, Yc1) and the second position coordinates (Xc2, Yc2). The calculation formula of the first adjustment parameter is: Xa1 = Xc2 - Xc1 Ya1 = Yc2 - Yc1 Wherein, Xa1 is the lateral adjustment value of the first adjustment parameter, and Ya1 is the longitudinal adjustment value of the first adjustment parameter.

9. A method for automatically achieving midpoint division of grinding allowance, characterized in that, The method includes: Form a first base by a first carrying body and a second carrying body; Grind the blade to be ground by a grinding component, and the grinding component is installed on the first carrying body through a first carriage; Clamp the blade to be ground by a tool holder component. The tool holder component is installed on the second carrying body through a second carriage. A ring base and a rotating disk are provided on the upper surface of the second carriage. The lower end of the rotating disk is rotatably sleeved in the central opening of the ring base; Adjust the center of the cutting edge arc of the blade to be ground by an adjustment component by using a first cross workbench. The first cross workbench is assembled on the rotating disk, and the tool holder component is installed on the first cross workbench; Control the movement of the rotating disk and the adjustment component by a controller, and return the tool holder component clamping the blade to be ground to the initial position, so that the rotation of the blade drives the center into the image detection visual field range; Collect a first image of the center driven by the rotation of the blade by an image detection component, and detect a first adjustment parameter based on the first image; Adjust the coincidence between the image detection center and the center driven by the rotation of the blade based on the first adjustment parameter; Collect a second image of the blade to be ground by the image detection component, and detect a second adjustment parameter for image detection based on the second image; The controller performs the following steps: Based on the second adjustment parameter, control the adjustment component, and use the first cross workbench to adjust the center of the tip arc to be ground of the blade to be ground to coincide with the image detection center; Control the rotating disk to drive the tool holder assembly and the blade to be ground to rotate, and grind the tip arc to be ground; Among them, detecting the second adjustment parameter for image detection based on the second image includes: Obtain a set of sampling points from the second image based on the first pre-adjusted tip straight line and the second pre-adjusted tip straight line; the set of sampling points includes: the first foot point from the image detection center to the first pre-adjusted tip straight line, the second foot point from the image detection center to the second pre-adjusted tip straight line, the first starting point and the first ending point at preset distance positions on both sides of the first foot point on the first pre-adjusted tip straight line, and the second starting point and the second ending point at preset distance positions on both sides of the second foot point on the second pre-adjusted tip straight line; Use the position coordinates of each sampling point to construct the first parameter equation set, the second parameter equation set, the third parameter equation set, and the fourth parameter equation set corresponding to the first pre-adjusted tip straight line, the first target tip straight line, the second pre-adjusted tip straight line, and the second target tip straight line respectively; The first parameter equation set is: X1 = Xt1 + t1·(Xe1 - Xs1) / L1 Y1 = Yt1 + t1·(Ye1 - Ys1) / L1 Wherein, t1 is the first parameter, X1 and Y1 are the abscissa and ordinate of the point on the first pre-adjusted tip straight line respectively, L1 is the first distance between the first starting point and the first ending point, Xs1 and Ys1 are the position coordinates of the first starting point, Xe1 and Ye1 are the position coordinates of the first ending point, and Xt1 and Yt1 are the position coordinates of the first foot point; The second parameter equation set is: X2 = Xt11 + t11·(Xe1 - Xs1) / L1 Y2 = Yt11 + t11·(Ye1 - Ys1) / L1 Wherein, t11 is the second parameter, X2 and Y2 are the abscissa and ordinate of the point on the first target tip straight line respectively, and Xt11 and Yt11 are the position coordinates of the third foot point corresponding to the third foot point from the image detection center to the first target tip straight line; Xt11 = F1·S1·Xt1 / Lt1 Yt11 = F1·S1·Yt1 / Lt1 Among them, F1 is the indication value of the first unit vector direction. When F1 satisfies the first preset condition, F1 takes 1. When F1 satisfies the second preset condition, F1 takes -1. The first preset condition is that the third parameter K1 is greater than 0, and the second preset condition is that the third parameter K1 is less than 0. K1 = (Xe1 - Xs1)·(0 - Ys1) - (Ye1 - Ys1)·(0 - Xs1). Lt1 is the second distance between the image detection center and the first foot point. Lt1 = sqrt[(Xt1) 2 +(Yt1) 2 , and S1 is the third distance between the image detection center and the third foot point; The third parameter equation set is: X3 = Xt2 + t2·(Xe2 - Xs2) / L2 Y3 = Yt2 + t2·(Ye2 - Ys2) / L2 Wherein, t2 is the fourth parameter, X3 and Y3 are the abscissa and ordinate of the point on the second pre-adjusted tip straight line respectively, L2 is the fourth distance between the second starting point and the second ending point, Xt2 and Yt2 are the position coordinates of the second foot point, Xs2 and Ys2 are the position coordinates of the second starting point, and Xe2 and Ye2 are the position coordinates of the second ending point; The fourth parameter equation set is: X4 = Xt22 + t22·(Xe2 - Xs2) / L2 Y4 = Yt22 + t22·(Ye2 - Ys2) / L2 Among them, t22 is the fifth parameter, X4 and Y4 are the abscissa and ordinate of the point on the second target tool tip straight line respectively, and Xt22 and Yt22 are the position coordinates of the fourth foot point corresponding to the fourth foot point from the image detection center to the second target tool tip straight line; Xt22 = F2·S2·Xt2 / Lt2 Yt22 = F2·S2·Yt2 / Lt2 Among them, F2 is the indication value of the direction of the second unit vector. When F2 satisfies the third preset condition, F2 takes 1. When F2 satisfies the fourth preset condition, F2 takes -1. The third preset condition is that the sixth parameter K2 is greater than 0, and the fourth preset condition is that the sixth parameter K2 is less than 0. K2 = (Xe2 - Xs2)·(0 - Ys2) - (Ye2 - Ys2)·(0 - Xs2), Lt2 is the fifth distance between the image detection center and the second foot point, Lt2 = sqrt[(Xt2) 2 +(Yt2) 2 , S2 is the sixth distance between the image detection center and the fourth foot point; Solve by combining each set of equations to obtain the first intersection position coordinates (Xp1, Yp1) of the first pre-adjusted tool tip straight line and the second pre-adjusted tool tip straight line, and the second intersection position coordinates (Xp2, Yp2) of the first target tool tip straight line and the second target tool tip straight line; Calculate the second adjustment parameter using the first intersection position coordinates (Xp1, Yp1) and the second intersection position coordinates (Xp2, Yp2). The calculation formula for the second adjustment parameter is: Xa2 = Xp2 - Xp1 Ya2 = Yp2 - Yp1 Among them, Xa2 is the lateral adjustment value of the second adjustment parameter, and Ya2 is the longitudinal adjustment value of the second adjustment parameter.

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