Grinding method and device for rear tool face of drill point, electronic equipment and storage medium

Abstract

The invention relates to a drill tip rear tool face grinding method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining a chisel edge curve; the chisel edge curve is used for representing a curve where a chisel edge is located; acquiring a circumferential intersecting line; the circumferential intersecting line is used for representing the intersecting line of the drill tip rear tool face and the drill bit outer cylindrical face; intersecting line points on the circumferential intersecting line respectively correspond to different curve points on the chisel edge curve; determining a grinding pose when the outer edge of the grinding tool passes through the corresponding intersection point and the curve point; and the grinding tool is controlled to grind the rear tool face of the drill tip according to the grinding pose. By adopting the method, the grinding efficiency of the rear tool face of the drill tip can be improved.

Description

Technical Field

[0001] The present application relates to the field of mechanical manufacturing technology, and in particular to a method, device, electronic device and storage medium for grinding the back face of a drill tip. Background Art

[0002] As the main tool for drilling, drill bits are widely used in mechanical manufacturing. During the drilling process, the back face of the drill bit can support the cutting edge, reduce cutting force and lower cutting temperature, so that the cutting edge can cut more stably and ensure the service life of the drill bit.

[0003] In the traditional technology, experienced workers manually grind the flank of the drill bit, which is quite limited and cannot guarantee the grinding efficiency of the flank of the drill tip. Summary of the invention

[0004] Based on this, it is necessary to provide a drill tip flank grinding method, device, electronic device and storage medium that can improve grinding efficiency in order to address the above technical problems.

[0005] In a first aspect, the present application provides a method for grinding a flank surface of a drill tip, comprising:

[0006] Obtaining a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located;

[0007] Obtaining a circumferential intersection line; the circumferential intersection line is used to characterize the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve;

[0008] Determine the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point;

[0009] The grinding tool is controlled according to the grinding posture to grind the flank surface of the drill tip.

[0010] In a second aspect, the present application also provides a drill tip flank grinding device, comprising:

[0011] A first acquisition module is used to acquire a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located;

[0012] The second acquisition module is used to acquire a circumferential intersection line; the circumferential intersection line is used to represent the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve;

[0013] A determination module, used to determine the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point;

[0014] A grinding module is used to control the grinding tool to grind the flank surface of the drill tip according to the grinding posture.

[0015] In a third aspect, the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps in the above method when executing the computer program.

[0016] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps in the above method when executed by a processor.

[0017] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps in the above method when executed by a processor.

[0018] The drill tip flank grinding method, device, electronic device, storage medium and computer program product are described above, by obtaining a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located; a circumferential intersection line is obtained; the circumferential intersection line is used to characterize the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve, which can ensure that there are no overlapping intersection points or curve points between a group of corresponding intersection points and curve points and another group of corresponding intersection points and curve points, thereby avoiding repeated grinding at a certain curve point or intersection point, and ensuring grinding efficiency. Then, the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point is determined. The grinding tool in the grinding posture can ensure that the chisel edge curve and the circular intersection line are ground on the drill bit at the same time, and the area between the chisel edge curve and the circular intersection line is the area where the drill tip flank is located. Therefore, the grinding tool is controlled according to the grinding posture to automatically grind the drill tip flank, which can improve the grinding efficiency of the drill tip flank compared to manual grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic flow chart of a drill tip flank grinding method provided in an embodiment of the present application.

[0020] Figure 2 A schematic diagram of a drill bit provided in an embodiment of the present application.

[0021] Figure 3 A schematic diagram of another drill bit provided in an embodiment of the present application.

[0022] Figure 4 A schematic diagram of a starting point of a circle intersection line provided in an embodiment of the present application.

[0023] Figure 5 A schematic diagram of a bowl-shaped grinding wheel provided in an embodiment of the present application.

[0024] Figure 6 A schematic diagram of a bowl-shaped grinding wheel in a feed position provided in an embodiment of the present application.

[0025] Figure 7 A schematic diagram of a grinding wheel in another feed position provided in an embodiment of the present application.

[0026] Figure 8 A schematic diagram of a bowl-shaped grinding wheel in a processing posture provided in an embodiment of the present application.

[0027] Fig. 9 A schematic diagram of a workpiece coordinate system provided in an embodiment of the present application.

[0028] Fig.10 A schematic diagram of a simulation result provided in an embodiment of the present application.

[0029] Fig.11 This is a structural block diagram of a drill tip flank grinding device provided in an embodiment of the present application.

[0030] Fig.12 An internal structure diagram of an electronic device provided in an embodiment of the present application DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] In an exemplary embodiment, Figure 1 As shown, a method for grinding the back face of a drill tip is provided, and the method is described by taking the method applied to an electronic device as an example. The electronic device may include at least one of a computer device or a numerical control machine. The computer device may include at least one of a terminal or a server. The method includes the following steps 102 to 108.

[0033] Step 102, obtaining a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located.

[0034] Among them, the chisel edge refers to the spatial edge formed by the intersection of the two drill tip back cutting surfaces on the drill bit.

[0035] In some embodiments, the electronic device may obtain an input chisel edge curve.

[0036] In some embodiments, the electronic device may acquire a preset chisel edge curve.

[0037] In some embodiments, the electronic device may obtain input curve parameters and determine a chisel edge curve that matches the curve parameters.

[0038] In some embodiments, the chisel edge curve may include at least one type of curve, such as a circular arc or a parabola.

[0039] In some embodiments, the curve parameters may include parameters related to the range of the chisel edge curve. For example, for a parabola curve type, the curve parameters may include parameters related to the endpoints of the chisel edge curve, which can indicate the range occupied by the chisel edge curve on the parabola.

[0040] In some embodiments, the curve parameters may include parameters related to the geometric characteristics of the chisel edge curve. For example, for a parabola curve type, the curve parameters may include at least one parameter of a quadratic term coefficient, a linear term coefficient, or a constant term of the parabola, which can indicate the geometric characteristics of the chisel edge curve.

[0041] In some embodiments, the chisel blade curve may be, but is not limited to, a chisel blade arc. It is understood that a chisel blade arc is a curve of the arc type. Curve parameters may include a chisel blade chord length and a chisel blade radius. The chisel blade chord length is used to characterize the length of the chord to which the chisel blade arc corresponds, and is a parameter related to the range of the chisel blade arc. The chisel blade radius is used to characterize the radius of the circle in which the chisel blade arc is located, and is a parameter related to the geometric properties of the chisel blade arc. The electronic device may determine a chisel blade arc that matches the chisel blade chord length and the chisel blade radius.

[0042] In some embodiments, the drill bit has a chisel edge, and may be, but is not limited to, a twist drill bit. For example, the drill bit may be a carbide drill bit. It is understood that in the field of mechanical manufacturing, there are also some special types or customized drill bits designed to have a chisel edge structure, and these drill bits are also applicable to the method provided in the present application, and the method provided in the present application can be used to grind the back face of these drill bits.

[0043] Step 104, obtaining a circumferential intersection line; the circumferential intersection line is used to characterize the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve.

[0044] The drill tip flank refers to the surface of the drill bit that is opposite to the machined surface. The drill bit may include two spatially symmetrical drill tip flanks. The drill bit outer cylindrical surface refers to the cylindrical surface outside the drill bit body. The drill bit outer cylindrical surface generally extends from the cutting portion of the drill bit to the shank of the drill bit. In some embodiments, the electronic device may obtain the inputted circumferential intersection line.

[0045] In some embodiments, the electronic device may obtain a preset circle intersection line.

[0046] In some embodiments, the electronic device may obtain input intersection line geometric parameters and determine a circular intersection line that matches the intersection line geometric parameters.

[0047] In some embodiments, the circumferential intersection line may include at least one type of curve, such as a circular arc or a cylindrical spiral line.

[0048] In some embodiments, the electronic device may determine a cylindrical spiral line that matches the intersection line geometric parameters as a circumferential intersection line.

[0049] In some embodiments, the correspondence between each intersection point on the circumferential intersection line and each curve point on the chisel edge curve may be preset. The electronic device does not need to correspond the curve points to the intersection points by itself.

[0050] In some embodiments, the electronic device may determine the corresponding curve points and intersection points according to the distribution order of each intersection point on the circular intersection line and the distribution order of each curve point on the chisel edge curve.

[0051] In some embodiments, the electronic device can determine a preset number of curve points on the chisel edge curve and a preset number of intersection points on the circumferential intersection line. By one-to-one correspondence between the preset number of curve points and the preset number of intersection points, corresponding curve points and intersection points are obtained. It should be noted that the one-to-one correspondence method is not specifically limited in this embodiment, as long as each intersection point corresponds to a different curve point.

[0052] Step 106, determining the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point.

[0053] In some embodiments, the grinding tool may be, but is not limited to, a grinding wheel or a file, etc. The grinding wheel may be, but is not limited to, a flat grinding wheel, a dish grinding wheel, a cup grinding wheel, or a file, etc.

[0054] In some embodiments, if the grinding posture of the outer edge of the grinding tool passing through the corresponding intersection points and curve points is different, different structures will be formed between the chisel edge curve and the circumferential intersection line, thereby processing the drill tip flank with different structures. The structure of the drill tip flank can be specified by the blade parameters. The electronic device can determine the grinding posture of the outer edge of the grinding tool passing through the corresponding intersection points and curve points based on the blade parameters, ensuring that the grinding tool in the grinding posture can process a grinding posture that meets the blade parameters.

[0055] In some embodiments, the grinding posture may include a feed posture. The intersection point may include a starting point of a circumferential intersection. The curve point may include a starting point of a chisel edge curve. The starting point of the circumferential intersection corresponds to the starting point of the chisel edge curve. The tool surface parameters may include a drill point angle and a chisel edge angle. The electronic device may determine the feed posture of the outer edge of the grinding tool passing through the corresponding chisel edge curve starting point and the circumferential intersection starting point based on the drill point angle and the chisel edge angle. Wherein, in the feed posture, the angle between the plane where the outer edge of the grinding tool is located and the plane perpendicular to the plane where the chisel edge curve is located and parallel to the tangent of the outer edge of the grinding tool at the starting point of the chisel edge curve is related to the drill point angle. Moreover, in the feed posture, the angle between the tangent of the outer edge of the grinding tool at the starting point of the chisel edge curve and the plane where the chisel edge curve is located is related to the chisel edge angle.

[0056] In some embodiments, the drill point angle may be, but is not limited to, the angle between two main cutting edge generatrixes on the drill. The main cutting edge refers to the cutting edge formed by the intersection of the rake face and the flank face on the drill.

[0057] In some embodiments, the chisel edge angle is related to the angle between the plane where the chisel edge curve is located and the rake face. The chisel edge angle may be, but is not limited to, the complementary angle of the angle between the plane where the chisel edge curve is located and the rake face.

[0058] In some embodiments, the chisel edge curve may include a chisel edge arc. The chisel edge curve starting point may be a chisel edge arc starting point.

[0059] In some embodiments, the starting point of the circumferential intersection line is located at one end of the circumferential intersection line and belongs to the end point of the circumferential intersection line. The starting point of the chisel edge curve is located at one end of the chisel edge curve and belongs to the end point of the chisel edge curve.

[0060] In some embodiments, the grinding posture may include a processing posture. The intersection point may include a midpoint of the intersection. The curve point may include a midpoint of the curve. The midpoint of the intersection refers to a point on the circumferential intersection except the starting point of the circumferential intersection. The midpoint of the curve refers to a point on the chisel edge curve except the starting point of the chisel edge curve. The tool surface parameters may include a cutting angle. The electronic device may determine the processing posture when the outer edge of the grinding tool passes through the corresponding midpoint of the intersection and the midpoint of the curve based on the cutting angle. Among them, in the processing posture, the angle between the plane where the outer edge of the grinding tool is located and the tangent of the circumferential intersection at the midpoint of the intersection is related to the cutting angle. It can be understood that the cutting angle can indicate the angle between the plane where the outer edge of the grinding tool is located and the tangent of the circumferential intersection at the midpoint of the intersection in the processing posture.

[0061] Step 108, controlling the grinding tool to grind the flank surface of the drill tip according to the grinding posture.

[0062] For example, the electronic device can adjust the posture of the grinding tool to the grinding posture, and control the grinding tool in the grinding posture to grind the drill tip flank between the corresponding intersection points and curve points on the blank. It can be understood that the blank refers to the unfinished drill bit raw material. The area ground by the grinding tool in the grinding posture between the corresponding intersection points and curve points on the blank is the area in the drill tip flank.

[0063] In some embodiments, the drill bit may be, but is not limited to, a cemented carbide drill bit. The blank may be, but is not limited to, a rod made of cemented carbide.

[0064] In the above drill tip flank grinding method, by obtaining the chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located; obtaining the circumferential intersection line; the circumferential intersection line is used to characterize the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection line point on the circumferential intersection line corresponds to different curve points on the chisel edge curve, which can ensure that there is no overlapping intersection line point or curve point between a set of corresponding intersection line points and curve points and another set of corresponding intersection line points and curve points, avoiding repeated grinding at a certain curve point or intersection line point, and ensuring the grinding efficiency. Then, the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection line point and curve point is determined, and the grinding tool under the grinding posture can ensure that the chisel edge curve and the circumferential intersection line are ground on the drill bit at the same time, and the area between the chisel edge curve and the circumferential intersection line is the area where the drill tip flank is located. Therefore, the grinding tool is controlled according to the grinding posture to automatically grind the drill tip flank, which can improve the grinding efficiency of the drill tip flank compared with the manual grinding method.

[0065] In some embodiments, the transverse blade curve includes a transverse blade arc; obtaining the transverse blade curve includes: obtaining the transverse blade chord length and the transverse blade radius; the transverse blade chord length is used to characterize the length of the chord corresponding to the transverse blade arc; the transverse blade radius is used to characterize the radius of the circle where the transverse blade arc is located; the transverse blade arc is determined according to the transverse blade chord length and the transverse blade radius.

[0066] For example, the electronic device can establish a reference coordinate system (RCS). In the reference coordinate system, the first-dimensional coordinate axis X' is parallel to the chord of the chisel blade arc, the third-dimensional coordinate axis Z is parallel to the tool axis, and the origin is located at the intersection of the tool axis and the chisel blade arc. The chisel blade chord length and the chisel blade radius can be externally input to the electronic device or preset in the electronic device.

[0067] Specifically, Figure 2 As shown, a schematic diagram of a drill is provided. The drill includes a chisel edge, a chip groove, a drill tip back face, and a chisel edge radius r hori , axial back angle γ gand drill radius R. In the reference coordinate system O-X'Y'Z, the origin is located at the intersection of the tool axis and the chisel edge, the positive direction of the third-dimensional coordinate axis Z is the direction from the origin to the outside of the drill bit, and the third-dimensional coordinate axis Z is collinear with the tool axis, the plane X'OZ formed by the first-dimensional coordinate axis X' and the third-dimensional coordinate axis Z is the plane where the chisel edge is located, and the second-dimensional coordinate axis, the first-dimensional coordinate axis and the third-dimensional coordinate axis form a right-handed coordinate system. It can be understood that collinearity is a special case of parallelism. Figure 3 In the reference coordinate system, the positive direction of the first-dimensional coordinate axis X' points to the starting point P0 of the chisel edge arc, and the first-dimensional coordinate axis X' is parallel to the chord of the chisel edge arc. Figure 3 In, L chord / 2 is half of the chord of the chisel blade arc. Figure 3 In, L chord The part marked with / 2 includes the solid line part and the dotted line part. The solid line part is the chisel edge retained on the drill bit after processing, that is, Figure 2 The chisel edge in the figure is the part that is ground away when the chip groove is ground after the drill tip flank is ground. The outer edge of the grinding tool in the grinding position passes through the chisel edge arc starting point P0 and the circumference intersection line starting point Q0 at the same time.

[0068] The electronic device can determine the angle between the radius of the chisel edge arc starting point and the third-dimensional coordinate axis Z in the reference coordinate system according to the chisel edge chord length and the chisel edge radius.

[0069] Specifically, Among them, θ chord It is the angle between the radius of the chisel edge arc starting point and the tool axis. arcsin() is the inverse sine function. L chord is the chord length of the cross-edge. hori is the chisel edge radius.

[0070] Furthermore, the electronic device can determine the expression of the chisel blade arc in the reference coordinate system based on the chisel blade radius and the center angle corresponding to the starting point of the chisel blade arc. The expression of the chisel blade arc in the reference coordinate system is used to describe the relationship between the curve point on the chisel blade arc and the center angle corresponding to the curve point. The center angle corresponding to the curve point refers to the angle of the radius of the curve point in the circle where the chisel blade arc is located relative to the first-dimensional coordinate axis in the reference coordinate system.

[0071] Specifically, Among them, P i is the curve point on the chisel edge arc. i is the curve point P i The corresponding central angle, that is, the curve point P iThe angle of the radius relative to the first-dimensional coordinate axis X' in the reference coordinate system. hori is the chisel edge radius. x is the curve point P i The first dimension coordinate value in the reference coordinate system. y curve point P i The second dimension coordinate value in the reference coordinate system. z curve point P i The third dimension coordinate value in the reference coordinate system. θ s It is the angle between the starting point of the chisel edge arc and the first-dimensional coordinate axis X' in the reference coordinate system. e It is the angle of the end point of the chisel blade arc relative to the first-dimensional coordinate axis X' in the reference coordinate system. It can be understood that the chisel blade arc is symmetrical, so the absolute value of the angle of the radius at the start point of the chisel blade arc and the radius at the end point of the chisel blade arc relative to the third-dimensional coordinate system Z in the reference coordinate system is the same. Therefore, the difference between the central angle corresponding to the end point of the chisel blade arc and the central angle corresponding to the start point of the chisel blade arc is twice the value of θ. chord .

[0072] In this embodiment, the chisel blade chord length and the chisel blade radius are obtained; the chisel blade chord length is used to characterize the length of the chord corresponding to the chisel blade arc; the chisel blade radius is used to characterize the radius of the circle where the chisel blade arc is located; the chisel blade arc is determined according to the chisel blade chord length and the chisel blade radius. Only the chisel blade chord length and the chisel blade radius are needed to determine the chisel blade arc, which is very convenient. In addition, the chisel blade chord length and the chisel blade radius are strongly related to the structural characteristics of the chisel blade on the drill bit. Different chisel blade chord lengths and chisel blade radii can be used to determine chisel blade arcs that meet different structural characteristics. When the subsequent grinding tool grinds the drill tip back face through the curve point on the chisel blade arc, chisels of different structures can be processed on the drill bit, which can meet the needs of different chisel blade structures and improve adaptability.

[0073] In some embodiments, the curve point includes the starting point of the transverse edge curve; the intersection point includes the starting point of the circular intersection line; obtaining the circular intersection line includes: determining a reference posture when the outer edge of the grinding tool passes through the starting point of the transverse edge curve and the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve is perpendicular to the plane where the transverse edge curve is located; determining a first rotation axis parallel to the axial direction of the grinding tool in the reference posture, rotating the reference posture according to the first rotation axis and the first angle to obtain a first posture; determining a second rotation axis parallel to the tangent of the outer edge of the grinding tool in the first posture at the starting point of the transverse edge curve, rotating the first posture according to the second rotation axis and the second angle to obtain a second posture; determining the starting point of the circular intersection line according to the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; determining the circular intersection line according to the starting point of the circular intersection line and the geometric parameters of the intersection line.

[0074] Exemplarily, the starting point of the chisel edge curve may be the starting point of the chisel edge arc. The electronic device may determine the coordinates of the starting point of the chisel edge arc in the reference coordinate system according to the chisel edge chord length and the chisel edge radius. Specifically, Among them, P0 is the starting point of the chisel edge arc. hori is the chisel edge radius. s It is the angle between the starting point of the chisel edge arc and the first-dimensional coordinate axis X' in the reference coordinate system. chord It is the angle between the radius of the chisel edge arc starting point and the tool axis. chord It is the length of the horizontal blade string.

[0075] The reference posture may include at least two of a reference axial vector, a reference tangential vector, or a reference radial vector in a reference coordinate system.

[0076] The reference axial vector is used to characterize the axial direction of the grinding tool in the reference position. The reference tangential vector is used to characterize the tangent direction of the outer edge of the grinding tool at the starting point of the chisel edge arc in the reference position. The reference radial vector is used to characterize the radial direction of the grinding tool at the starting point of the chisel edge arc in the reference position. Among them, the reference axial vector is parallel to the tool axis. The reference radial vector is parallel to the chord corresponding to the chisel edge arc. The reference tangential vector is perpendicular to the reference radial vector and the reference axial vector. Specifically, in, is the reference radial vector in the reference coordinate system. is the axial vector in the reference coordinate system. is the reference tangent vector in the reference coordinate system.

[0077] The first angle is related to the chisel edge angle. The electronic device can determine the first angle based on the chisel edge angle. The first angle can be, but is not limited to, a preset multiple of the chisel edge angle. Specifically, α0=α hori / n(5). Where α0 is the first angle. hori is the chisel edge angle. 1 / n is a preset multiple. The preset multiple can be less than 1, and can be, but not limited to, 1 / 2, 1 / 3 or 1 / 4, etc.

[0078] The first posture may include at least one of a first axial vector, a first radial vector, or a first tangential vector in a reference coordinate system. The electronic device may use the reference axial vector as the first rotation axis. Using the Rodriguez rotation formula, the reference radial vector is rotated around the first rotation axis by a first angle to obtain the first radial vector. Using the Rodriguez rotation formula, the reference tangential vector is rotated around the first rotation axis by a first angle to obtain the first tangential vector. The reference axial vector is used as the first axial vector.

[0079] Specifically, in, is the reference radial vector. is the axial vector. is the reference tangent vector. Fr′ is the first radial vector. F t′ is the first tangent vector. F g′ is the first axial vector. α0 is the first angle. It can be understood that the first axial vector is used to characterize the axial direction of the grinding tool in the first posture. The first tangential vector is used to characterize the tangent direction of the outer edge of the grinding tool at the starting point of the chisel edge arc in the first posture. The first radial vector is used to characterize the radial direction of the grinding tool at the starting point of the chisel edge arc in the first posture.

[0080] The second angle is related to the drill point angle. The electronic device can determine the second angle based on the drill point angle. The second angle can be, but is not limited to, 0.5 times the drill point angle. Specifically, Among them, δ c is the second angle. p It is a drill point angle.

[0081] The second posture may include at least one of a second radial vector, a second tangential vector, or a second axial vector in the reference coordinate system. The electronic device may use the first tangential vector as the second rotation axis. Using the Rodriguez rotation formula, the reference radial vector is rotated around the second rotation axis by a second angle to obtain a second radial vector. Using the Rodriguez rotation formula, the reference axial vector is rotated around the second rotation axis by a second angle to obtain a second axial vector. The first tangential vector is used as the second tangential vector. Specifically, Among them, F r′ is the first radial vector. F t′ is the first tangent vector. F g′ is the first axial vector. F r0 is the second radial vector. F t0 is the second tangent vector. F g0 is the second axial vector. c It is the second angle.

[0082] The electronic device can determine the expression of the outer edge of the grinding tool in the reference coordinate system in the second posture. The grinding tool can be but is not limited to a grinding wheel. The outer edge of the grinding tool is the outer circle of the large end of the grinding wheel. The electronic device can determine the expression of the outer circle of the large end of the grinding wheel in the reference coordinate system based on the second posture and the radius of the outer circle of the large end of the grinding wheel. The expression of the outer circle of the large end of the grinding wheel in the reference coordinate system is used to describe the relationship between the coordinates of the grinding point on the outer circle of the large end of the grinding wheel in the reference coordinate system and the angle between the straight line passing through the center of the outer circle of the large end of the grinding wheel and the grinding point and the reverse vector of the second radial vector. The second posture may include the coordinates of the center of the outer circle of the large end of the grinding wheel in the reference coordinate system, the second radial vector and the second tangential vector.

[0083] Specifically, Among them, (w x , w y , w z ) is the coordinate of the grinding point W on the outer circle of the large end of the grinding wheel in the reference coordinate system. w It is the radius of the outer circle of the large end of the grinding wheel. wx , O wy , O wz ) is the center of the outer circle of the large end of the grinding wheel w Coordinates in the reference coordinate system. F r0 is the second radial vector. Is a vector with the opposite direction to the second radial vector. F t0 is the second tangent vector. The center of the outer circle of the large end of the grinding wheel is O w The vector pointing to the grinding point W and the reverse vector of the second radial vector The angle between them, that is, yes and Angle. yes The components of the first coordinate axis in the reference coordinate system. yes The components of the second dimension in the reference coordinate system. yes The components of the third dimension in the reference coordinate system. yes The components of the first coordinate axis in the reference coordinate system. yes The components of the second dimension in the reference coordinate system. yes The components of the third dimension in the reference coordinate system.

[0084] The electronic device can determine the expression of the outer cylindrical surface of the drill bit in the reference coordinate system according to the drill bit radius. Specifically, x 2 +y 2 -R 2 = 0. Where (x, y, 0) is the coordinate of the point on the outer cylindrical surface of the drill bit in the reference coordinate system. R is the radius of the drill bit.

[0085] The electronic device can determine the intersection coordinates that simultaneously satisfy the expression of the outer cylindrical surface of the drill bit in the reference coordinate system and the expression of the outer circle of the large end of the grinding wheel in the second posture in the reference coordinate system. Specifically, Among them, (Q 0x , Q 0y , Q 0z ) is the coordinate of the intersection point Q0 in the reference coordinate system, that is, the intersection coordinate. wis the radius of the outer circle of the large end of the grinding wheel. R is the radius of the drill bit. yes The components of the first coordinate axis in the reference coordinate system. yes The components of the second dimension in the reference coordinate system. yes The components of the third dimension in the reference coordinate system. yes The components of the first coordinate axis in the reference coordinate system. yes The components of the second dimension in the reference coordinate system. yes The components of the third dimension in the reference coordinate system. is the reverse vector of the second radial vector. is the second tangent vector. It is the angle between the vector from the center of the outer circle of the large end of the grinding wheel to the intersection point and the reverse vector of the second radial vector, that is, yes and Angle.

[0086] The electronic device can determine the coordinates of the starting point of the circular intersection line in the reference coordinate system according to the coordinates of the intersection point, and determine the expression of the circular intersection line in the reference coordinate system according to the geometric parameters of the intersection line and the coordinates of the starting point of the circular intersection line in the reference coordinate system.

[0087] In some embodiments, the electronic device may use the intersection point coordinates as the coordinates of the starting point of the circumference intersection line in the reference coordinate system. The second posture is determined as the tool feed posture.

[0088] In some embodiments, the circumferential intersection line may be, but is not limited to, a cylindrical helix. The intersection line geometric parameters may include an axial back angle. The axial back angle is used to characterize the angle between the tangent of the cylindrical helix and a plane perpendicular to the thread axis. The thread axis is colinear with the tool axis. The electronic device may determine a cylindrical helix that matches the circumferential intersection line starting point and the axial back angle to obtain the circumferential intersection line.

[0089] In some embodiments, the intersection line geometric parameters may include a drill bit radius, an axial back angle, and an end point parameter. The end point parameter is used to indicate the end point of the circumferential intersection line on the circular intersection line. The end point parameter is used to characterize the difference between the end point of the circumferential intersection line and the starting point of the circumferential intersection line. For example, the end point parameter may be, but is not limited to, an angle difference. The angle difference refers to the difference between the rotation angle corresponding to the starting point of the circumferential intersection line on the cylindrical spiral and the rotation angle corresponding to the end point of the circumferential intersection line. The starting point of the circumferential intersection line and the angle difference can jointly specify the range of the cylindrical spiral line, while the axial back angle can specify the degree of inclination of the cylindrical spiral line. The electronic device can use the parametric equation of the cylindrical spiral line to determine the expression of the circumferential intersection line in the reference coordinate system according to the drill bit radius, the starting point of the circumferential intersection line, the axial back angle, and the end point parameters. The expression of the circumferential intersection line in the reference coordinate system is used to describe the relationship between the intersection point on the circular intersection line and the rotation angle corresponding to the intersection point. Specifically, Among them, Q i is the point of intersection on the circumference of the circle. (x, y, z) is Q i Coordinates in the reference coordinate system. i It is the intersection point Q i The corresponding rotation angle. The rotation angle corresponding to the intersection point is used to characterize the angle of the projection circle radius where the intersection point is located in the projection circle perpendicular to the thread axis relative to the first-dimensional coordinate axis of the reference coordinate system. R is the drill radius. z0 is the third-dimensional coordinate value of the starting point of the circumferential intersection in the reference coordinate system. β0 is the rotation angle corresponding to the starting point of the circumferential intersection. γ g is the axial back angle. grind It's the angle difference.

[0090] In some embodiments, the electronic device may determine the coordinates of the starting point of the circular intersection line in the reference coordinate system based on the coordinates of the intersection point, and further determine the rotation angle corresponding to the starting point of the circular intersection line based on the coordinates of the starting point of the circular intersection line in the reference coordinate system.

[0091] In this embodiment, by determining the reference posture when the outer edge of the grinding tool passes through the starting point of the transverse edge curve and the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve is perpendicular to the plane where the transverse edge curve is located; determining a first rotation axis parallel to the axial direction of the grinding tool in the reference posture, rotating the reference posture according to the first rotation axis and the first angle, obtaining a first posture, the grinding tool in the first posture ensures that there is a first rotation angle between the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve and the plane where the transverse edge curve is located, and can ensure that the back cutting edge of the ground drill tip has a structure corresponding to the first rotation angle. Determine a second rotation axis parallel to the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve in the first posture, and rotate the first posture according to the second rotation axis and the second angle to obtain a second posture, the grinding tool in the second posture ensures that there is a second rotation angle between the plane where the outer edge of the grinding tool is located and a plane perpendicular to the plane where the transverse edge curve is located and parallel to the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve, and can ensure that the back cutting edge of the ground drill tip has a structure corresponding to the second rotation angle. By adaptively adjusting the two parameters of the first rotation angle and the second rotation angle, different circumferential intersection line starting points can be determined according to the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture, and then the circumferential intersection line that meets the structural requirements of different drill tip flanks can be determined according to the circumferential intersection line starting point and the intersection line geometric parameters, thereby improving adaptability.

[0092] In some embodiments, the starting point of the circular intersection line is determined according to the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture, including: determining the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; rotating the intersection according to the first rotation axis and the starting point correction angle to obtain the starting point of the circular intersection line.

[0093] For example, the electronic device can determine the intersection coordinates that simultaneously satisfy the expression of the outer cylindrical surface of the drill bit in the reference coordinate system and the expression of the outer circle of the large end of the grinding wheel in the second posture in the reference coordinate system. The starting point correction angle is used as the input of the rotation function around the first rotation axis to obtain the rotation matrix around the first rotation axis, and then the product of the intersection coordinates and the rotation matrix around the first rotation axis is calculated to obtain the coordinates of the starting point of the circumferential intersection line in the reference coordinate system. Specifically, Q′0=rotz(ΔL s )*Q0(12). Where Q′0 is the coordinate of the starting point of the circle intersection line in the reference coordinate system. rotz(ΔL s ) is the rotation matrix around the first rotation axis. rotz() is the rotation function around the first rotation axis. It can be understood that the first rotation axis is the third-dimensional coordinate axis Z in the reference coordinate system. ΔL s is the correction angle of the starting point. Q0 is the intersection point coordinate.

[0094] In some embodiments, the electronic device can determine the rotation angle corresponding to the intersection point according to the intersection point coordinates. The rotation angle corresponding to the starting point of the circumferential intersection line is determined according to the rotation angle and the starting point correction angle. The starting point correction angle is used to characterize the difference between the rotation angle corresponding to the intersection point and the rotation angle corresponding to the starting point of the circumferential intersection line.

[0095] In some embodiments, Figure 4 As shown, a schematic diagram of the starting point of the circumferential intersection line is provided. The outer edge of the grinding tool in the second posture intersects with the outer cylindrical surface of the drill bit at the intersection point Q0. The intersection point Q0 rotates around the first rotation axis to the starting point correction angle ΔL s Then, we get the starting point Q′0 of the circle intersection line. end It is the end point of the circle intersection line. grind It is the end point parameter, which is used to characterize the range from the starting point of the circle intersection line to the end point of the circle intersection line.

[0096] In this embodiment, by determining the intersection point of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture, the intersection point is not directly used as the starting point of the circular intersection line. Instead, a process parameter, the starting point correction angle, is introduced. During the grinding of the back face of the drill tip, the starting point correction angle can be adaptively adjusted according to different process conditions. The intersection point is then rotated according to the first rotation axis and the starting point correction angle. The resulting starting point of the circular intersection line can meet different process conditions, thereby improving adaptability.

[0097] In some embodiments, the starting point of the transverse edge curve corresponds to the starting point of the circular intersection line; the grinding posture includes the feed posture; determining the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and the curve point, including: determining the first projection vector of the straight line passing through the starting point of the transverse edge curve and the intersection point on the projection plane perpendicular to the tool axis, and the second projection vector of the straight line passing through the starting point of the transverse edge curve and the starting point of the circular intersection line on the projection plane; determining the projection angle between the first projection vector and the second projection vector; rotating the second posture according to the first rotation axis and the projection angle to obtain the feed posture when the outer edge of the grinding tool passes through the corresponding starting point of the transverse edge curve and the starting point of the circular intersection line.

[0098] Exemplarily, the projection plane perpendicular to the tool axis is the plane where the first and second coordinate axes in the reference coordinate system are located, that is, the X'OY' plane. The electronic device can determine the first projection vector of the vector from the starting point of the chisel edge curve to the intersection point on the X'OY' plane based on the coordinates of the intersection point and the coordinates of the starting point of the chisel edge curve in the reference coordinate system. The second projection vector of the vector from the starting point of the chisel edge curve to the starting point of the circular intersection line on the X'OY' plane is determined based on the coordinates of the starting point of the circular intersection line in the reference coordinate system and the coordinates of the starting point of the chisel edge curve in the reference coordinate system.

[0099] The electronic device may calculate the arc cosine value of the ratio between the inner product of the first projection vector and the second projection vector and the product of the modulus of the first projection vector and the modulus of the second projection vector to obtain the projection angle. Specifically, Where ω is the projection angle. is the first projection vector. is the second projection vector. is the magnitude of the first projection vector. is the magnitude of the second projection vector.

[0100] The second posture may include at least one of a second radial vector, a second axial vector or a second tangential vector. The feed posture may include at least one of a feed radial vector, a feed axial vector or a feed tangential vector. The electronic device may use the Rodriguez rotation formula to rotate the second radial vector around the first rotation axis by a projection angle to obtain the feed radial vector. Using the Rodriguez rotation formula, the second tangential vector is rotated around the first rotation axis by a projection angle to obtain the feed tangential vector. Using the Rodriguez rotation formula, the second axial vector is rotated around the first rotation axis by a projection angle to obtain the feed axial vector. Specifically, Among them, F ′ r0 F is the radial vector of the tool feed. ′ g0 F is the axial vector of the feed. ′ t0 F is the cutting tangent vector. r0 is the second radial vector. F g0 is the second axial vector. F t0 is the second tangent vector. is the vector of the first rotation axis and also the third-dimensional coordinate axis in the reference coordinate system. ω is the projection angle.

[0101] In some embodiments, the feed posture may include a feed position. The electronic device may determine the feed position according to the starting point of the chisel edge curve, the size parameters of the grinding tool, and the radial direction of the grinding tool at the starting point of the chisel edge curve in the feed posture.

[0102] In some embodiments, the electronic device may determine the coordinates of the feed position in the reference coordinate system according to the coordinates of the starting point of the chisel edge curve in the reference coordinate system, the size parameters of the grinding tool, and the feed radial vector.

[0103] In some embodiments, the grinding tool may be, but is not limited to, a bowl-shaped grinding wheel. The outer edge of the grinding tool refers to the outer circle of the large end of the grinding wheel. The size parameters may include the radius of the outer circle of the large end of the grinding wheel and the height of the grinding wheel. The electronic device may determine the coordinates of the feed position in the reference coordinate system based on the coordinates of the starting point of the chisel edge curve in the reference coordinate system, the radius of the outer circle of the large end of the grinding wheel, the height of the grinding wheel, the radial vector of the feed, and the axial vector of the feed. Specifically, O w rcs =P0+F ′ r0 *R w +F ′ g0 *H w (15). Among them, O w rcs is the coordinate of the feed position in the reference coordinate system. The feed position is used to represent the position of the center of the outer circle of the large end of the grinding wheel in the feed position. P0 is the starting point of the chisel edge curve. ′ r0 is the radial vector of the cutting tool. w F is the radius of the outer circle of the large end of the grinding wheel. ′ g0 H is the axial vector of the feed. w The height of the grinding wheel refers to the height from the outer circle of the large end of the grinding wheel to the bottom of the bowl-shaped grinding wheel.

[0104] In some embodiments, Figure 5 As shown, a schematic diagram of a bowl-shaped grinding wheel is provided. The dimensional parameters of the bowl-shaped grinding wheel may include the grinding wheel height H w , the outer diameter of the large end of the grinding wheel D w 、Grinding wheel bevel angle θ w and abrasive width H w The grinding wheel height is used to characterize the distance from the outer circle of the large end of the grinding wheel to the bottom surface of the bowl-shaped grinding wheel. The grinding wheel bevel angle is used to characterize the inclination angle of the abrasive on the generatrix of the bowl-shaped grinding wheel relative to the surface where the outer circle of the large end of the grinding wheel is located.

[0105] In some embodiments, the grinding tool may be, but is not limited to, a 11V9 grinding wheel.

[0106] In some embodiments, Figure 6 As shown in FIG. 1 , a schematic diagram of a bowl-shaped grinding wheel in a feed position is provided. The outer circle of the large end of the grinding wheel in the feed position and the reference position will pass through the starting point P0 of the chisel edge arc. The reference radial vector F of the grinding wheel in the reference position is r After rotating the first rotation axis by the first angle α0, the first radial vector F is obtained. r′ The reference axial vector F of the grinding wheel in the reference position g Rotate the second rotation axis by a second angle δ c Then we get the second axial vector Fg0 It can be understood that if the starting point correction angle is not considered, that is, the intersection point is taken as the starting point of the circle intersection line, then the second posture is the feed posture, and the second axial vector is the feed axial vector, which can characterize the posture of the grinding wheel in the feed posture.

[0107] In some embodiments, Figure 7 As shown, a schematic diagram of a grinding wheel in another feed position is provided. If the starting point correction angle is to be considered, the intersection point Q0 is rotated around the first rotation axis by the starting point correction angle to obtain the circumferential intersection line starting point Q′0, the outer circle of the grinding wheel in the feed position passes through the chisel edge arc starting point P0 and the circumferential intersection line starting point Q′0, and the outer circle of the grinding wheel in the second position passes through the chisel edge arc starting point P0 and the intersection point Q0. In fact, the feed position and the second position differ in a projection angle relative to the second rotation axis, and the feed position can be obtained by rotating the second position around the second rotation axis by the projection angle.

[0108] In this embodiment, because the starting point of the circumferential intersection line is obtained by rotating the intersection point through which the outer edge of the grinding tool in the second posture passes, the second posture needs to be further adjusted to obtain the feed posture to ensure that the outer edge of the grinding tool in the feed posture passes through the starting point of the circumferential intersection line and the starting point of the transverse edge curve. By determining the first projection vector of the straight line passing through the starting point of the transverse edge curve and the intersection point on the projection plane perpendicular to the tool axis, and the second projection vector of the straight line passing through the starting point of the transverse edge curve and the starting point of the circumferential intersection line on the projection plane; determining the projection angle between the first projection vector and the second projection vector; rotating the second posture according to the first rotation axis and the projection angle, the feed posture when the outer edge of the grinding tool passes through the corresponding starting point of the transverse edge curve and the starting point of the circumferential intersection line can be obtained, so that according to the feed posture, the grinding tool can be accurately controlled to grind a partial area of ​​the drill tip back face between the starting point of the transverse edge curve and the starting point of the circumferential intersection line, thereby improving the efficiency of grinding the drill tip back face.

[0109] In some embodiments, the method also includes: determining each curve point on the transverse edge curve that has a different distribution order relative to the starting point of the transverse edge curve; determining each intersection point on the circular intersection line that has a different distribution order relative to the starting point of the circular intersection line; and using the curve points and intersection points corresponding to the same distribution order as corresponding curve points and intersection points.

[0110] Exemplarily, the electronic device may discretize the chisel edge curve to obtain a preset number of curve points. It can be understood that from the starting point to the ending point of the chisel edge curve, the preset number of curve points are distributed on the chisel edge curve in sequence, so the distribution order of these curve points relative to the starting point of the chisel edge curve is different. Discretize the circumferential intersection line to obtain a preset number of intersection points. It can be understood that from the starting point to the ending point of the circumferential intersection line, the preset number of intersection points are distributed on the circumferential intersection line in sequence, so the distribution order of these intersection points relative to the starting point of the circumferential intersection line is different. The curve points and intersection points corresponding to the same distribution order are used as the corresponding curve points and intersection points. It can be understood that the nth curve point relative to the starting point of the chisel edge curve corresponds to the nth intersection point relative to the starting point of the circumferential intersection line, where 0 < n < preset number - 1.

[0111] In some embodiments, the electronic device may perform average discretization on the chisel edge curve to obtain a preset number of curve points. Perform average discretization on the circumferential intersection line to obtain a preset number of curve points. It can be understood that because the discretization of the chisel edge curve and the circumferential intersection line is average, it can be ensured as much as possible that the changes between the grinding postures when passing through different corresponding intersection points and curve points are uniform, thereby avoiding problems such as additional vibrations or frictions of the grinding tool caused by uneven posture changes, improving the stability of the grinding tool, and ensuring the grinding efficiency of the flank face of the drill tip.

[0112] In some embodiments, the chisel edge curve may include a chisel edge arc. The electronic device may implement the discretization of the chisel edge arc according to the expression of the chisel edge arc in the reference coordinate system. Specifically, the expression of the chisel edge arc in the reference coordinate system is used to represent the relationship between the coordinates of the curve points in the reference coordinate system and the central angle corresponding to the curve points. The electronic device may discretize the central angle range formed by the central angle corresponding to the starting point of the chisel edge arc and the central angle corresponding to the ending point of the chisel edge arc to obtain a preset number of central angles. The preset number of central angles are respectively used as the inputs of the expression of the chisel edge arc in the reference coordinate system to obtain the coordinates of the preset number of curve points in the reference coordinate system respectively.

[0113] In some embodiments, the electronic device may implement the discretization of the circumferential intersection line according to the expression of the circumferential intersection line in the reference coordinate system. Specifically, the expression of the circumferential intersection line in the reference coordinate system is used to represent the relationship between the coordinates of the intersection points on the circumferential intersection line in the reference coordinate system and the rotation angle corresponding to the intersection points. The electronic device may discretize the rotation angle range formed by the rotation angle corresponding to the starting point of the circumferential intersection line and the rotation angle corresponding to the ending point of the circumferential intersection line to obtain a preset number of rotation angles. The preset number of rotation angles are respectively used as the inputs of the expression of the circumferential intersection line in the reference coordinate system to obtain the coordinates of the preset number of intersection points in the reference coordinate system respectively.

[0114] In some embodiments, the motion trajectory of the grinding tool may be from the starting point of the chisel edge curve to the end point of the chisel edge curve. The motion trajectory of the grinding tool may include grinding postures when passing through the curve points and corresponding intersection points arranged in the distribution order of the curve points relative to the starting point of the chisel edge curve.

[0115] In some embodiments, the motion trajectory of the grinding tool may be from the starting point of the circumferential intersection to the end point of the circumferential intersection. The motion trajectory of the grinding tool may include grinding postures when passing through the intersection points and corresponding curve points arranged in the distribution order of the intersection points relative to the starting point of the circumferential intersection.

[0116] In this embodiment, by determining the curve points on the transverse edge curve that have different distribution orders relative to the starting point of the transverse edge curve; determining the intersection points on the circular intersection line that have different distribution orders relative to the starting point of the circular intersection line; using the curve points and intersection points corresponding to the same distribution order as corresponding curve points and intersection points, and subsequently grinding the back face of the drill tip according to the grinding posture when the outer edge of the grinding tool passes through the corresponding curve points and intersection points, it can be ensured that the grinding areas of the grinding tools in different grinding postures on the drill bit do not intersect, the grinding at the corresponding curve points and intersection points do not affect each other, and the accuracy of the grinding of the back face of the drill tip is guaranteed.

[0117] In some embodiments, the intersection point includes the middle point of the intersection; the curve point includes the middle point of the curve; the grinding posture includes the processing posture; determining the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and the curve point, including: determining the intersection tangent vector of the circular intersection at the middle point of the intersection; determining the processing posture when the outer edge of the grinding tool passes through the corresponding middle point of the intersection and the middle point of the curve according to the cutting angle and the intersection tangent vector; wherein, in the processing posture, the angle between the plane where the outer edge of the grinding tool is located and the intersection tangent vector is related to the cutting angle.

[0118] In some embodiments, the machining posture may include at least one of a machining axial vector, a machining radial vector, or a machining tangential vector, and a machining position. The machining axial vector is used to characterize the axial direction of the grinding tool in the machining posture. The machining tangential vector is used to characterize the tangent direction of the outer edge of the grinding tool at the midpoint of the intersection line in the machining posture. The machining radial vector is perpendicular to the machining tangential vector and the machining axial vector. The machining position is used to characterize the position of the grinding tool in the machining posture.

[0119] In some embodiments, the electronic device can determine the intersection tangent vector according to the rotation angle and axial back angle corresponding to the middle point of the intersection. Among them, T Q is the tangent vector of the intersection line. is the rotation angle corresponding to the midpoint of the intersection line. g is the axial back angle.

[0120] In some embodiments, the electronic device can determine the direction vector of the line between the corresponding midpoint of the intersection and the midpoint of the curve. The grinding tool can be a grinding wheel. The outer edge of the grinding tool is the outer circle of the grinding wheel. In the machining posture, the outer circle of the grinding wheel passes through the corresponding midpoint of the intersection and the midpoint of the curve, and the midpoint of the midpoint of the intersection and the midpoint of the curve on the outer circle of the grinding wheel is the cutting depth point of the grinding wheel in the machining posture. In the machining posture, the tangent direction of the outer circle of the grinding wheel at the cutting depth point is parallel to the direction vector, that is, the direction vector is used to characterize the tangent direction of the outer circle of the grinding wheel at the cutting depth point in the machining posture.

[0121] In some embodiments, the electronic device can calculate the ratio of the reverse vector from the middle point of the curve to the middle point of the intersection and the distance from the middle point of the intersection to the middle point of the curve for the corresponding middle point of the intersection and the middle point of the curve to obtain the direction vector. Specifically, Among them, F ti is the direction vector. From the middle point P of the curve i Point to the middle point Q of the intersection line i The reverse vector of . From the middle point P of the curve i To the middle point Q of the intersection i distance.

[0122] In some embodiments, the processing posture may include a processing axis vector. The electronic device may determine an intermediate axis vector perpendicular to the direction vector and the intersection tangent vector. Specifically, F g′ =T Q ×F ti (18). Among them, F g′ is the median axis vector. Q is the tangent vector of the intersection line. ti is a direction vector. The electronic device can use the direction vector as the third rotation axis, and rotate the intermediate axis vector according to the third rotation axis and the cutting angle to obtain the machining axial vector.

[0123] In some embodiments, the electronic device can use the Rodriguez rotation formula to rotate the intermediate axis vector around the third rotation axis by a cutting angle to obtain a machining axial vector. Specifically, F gi =F g′ *cosε+(F ti ×F g′ )*sinε+F ti ·(F ti ·F g′ )(1-cosε)(19). Among them, F gi is the machining axial vector.g′ is the median axis vector. ti is the direction vector. ε is the cutting angle.

[0124] In some embodiments, Figure 8 As shown in FIG. 1 , a schematic diagram of a bowl-shaped grinding wheel in a machining position is provided. The dimensional parameters of a bowl-shaped grinding wheel may also include the radius of the large end of the grinding wheel r up There is a cutting angle ε between the axial direction of the bowl-shaped grinding wheel in the machining position and the direction perpendicular to the straight line passing through the middle point of the curve and the middle point of the intersection line, and perpendicular to the tangent line of the circumferential intersection line at the middle point of the intersection line. It can be understood that the angle between the machining axial vector of the bowl-shaped grinding wheel in the machining position and the intermediate axis vector is the cutting angle ε.

[0125] In some embodiments, the machining posture may include a machining radial vector. The electronic device may determine an intermediate radial vector perpendicular to the direction vector and the machining axis vector. The intermediate radial vector is used to characterize the radial direction of the outer circle of the grinding wheel at the cutting depth point in the machining posture. Specifically, F ri =F ti ×F gi (20). Among them, F ri is the median radial vector. F ti is the direction vector. gi is the machining axial vector. The electronic device can determine the middle center angle of the arc between the cutting depth point on the outer circle of the grinding wheel and the middle point of the intersection line. The electronic device can determine the machining axial vector as the fourth rotation axis, rotate the middle radial vector according to the fourth rotation axis and the middle center angle, and obtain the machining radial vector.

[0126] In some embodiments, the electronic device can determine the middle center angle according to the outer diameter of the grinding wheel and the distance from the middle point of the curve to the middle point of the intersection line. For example, the electronic device can calculate the arc sine value of the ratio of the distance from the middle point of the curve to the middle point of the intersection line to the outer diameter to obtain the middle center angle. Specifically, Where λ is the center angle of the circle. w is the outer diameter. R w is the outer radius. is the middle point P of the curve i To the middle point Q of the intersection i distance.

[0127] In some embodiments, the electronic device may determine the machining axial vector as the fourth rotation axis. Using the Rodriguez rotation formula, the intermediate radial vector is rotated around the fourth rotation axis by the intermediate center angle to obtain the machining radial vector. Specifically, F rQi =F ri *cosλ+(Fgi ×F ri )*sinλ+F gi ·(F gi ·F ri )(1-cosλ)(22). Where, F rQi is the machining radial vector. ri is the median radial vector. λ is the median central angle. F gi is the machining axial vector.

[0128] In some embodiments, the processing position is used to characterize the position of the center of the outer circle of the grinding wheel in the processing posture. The grinding wheel may be a bowl-shaped grinding wheel. The outer circle of the grinding wheel refers to the outer circle of the large end of the bowl-shaped grinding wheel. The electronic device may determine the processing position based on the midpoint of the intersection, the processing radial vector, the radius of the outer circle of the large end of the grinding wheel, the height of the grinding wheel, and the processing axial vector. Exemplarily, the electronic device may weight the radius of the outer circle of the large end of the grinding wheel according to the processing radial vector to obtain a first weighted result. The height of the grinding wheel is weighted according to the processing axial vector to obtain a second weighted result. The first weighted result, the second weighted result, and the coordinates of the midpoint of the intersection in the reference coordinate system are superimposed to obtain the coordinates of the processing position in the reference coordinate system. Specifically, O g rcs =Q i +F rQi *R w +F gi *H w (23). Among them, O g rcs It is the coordinate of the processing position in the reference coordinate system. i is the midpoint of the intersection. rQi is the machining radial vector. R w F is the radius of the outer circle of the large end of the grinding wheel. gi H is the axial vector of the grinding wheel. w is the grinding wheel height.

[0129] In some embodiments, the electronic device can establish a workpiece coordinate system. In the workpiece coordinate system, the first-dimensional coordinate axis X is perpendicular to the front cutting edge, the second-dimensional coordinate axis Y is parallel to the front cutting edge, the third-dimensional coordinate axis Z is parallel to the tool axis, and the origin is located at the intersection of the tool axis and the chisel edge curve. The workpiece coordinate system is the same as the third-dimensional coordinate axis of the reference coordinate system. The angle between the first-dimensional coordinate axis of the workpiece coordinate system and the first-dimensional coordinate axis of the reference coordinate system is related to the chisel edge angle. The angle between the second-dimensional coordinate axis of the workpiece coordinate system and the second-dimensional coordinate axis of the reference coordinate system is related to the chisel edge angle. Therefore, the reference coordinate system is rotated with the third-dimensional coordinate axis as the rotation axis according to the chisel edge angle to obtain the workpiece coordinate system.

[0130] In some embodiments, Fig. 9 As shown, a schematic diagram of the workpiece coordinate system is provided. The angle between the first-dimensional coordinate axis of the workpiece coordinate system and the first-dimensional coordinate axis of the reference coordinate system is the transverse edge angle, and the angle between the second-dimensional coordinate axis of the workpiece coordinate system and the second-dimensional coordinate axis of the reference coordinate system is the transverse edge angle. Then, the reference coordinate system is rotated around the third-dimensional coordinate axis by the transverse edge angle to obtain the workpiece coordinate system. The electronic device can determine the coordinate conversion data from the reference coordinate system to the workpiece coordinate system based on the transverse edge angle. The coordinate conversion data can be used to rotate the coordinates in the reference coordinate system counterclockwise around the third-dimensional coordinate axis by the transverse edge angle. Specifically, Among them, rotz(-α hori ) is the coordinate transformation data. hori is the chisel angle. rotz() is a rotation function around the third-dimensional coordinate axis. The electronic device can convert the grinding posture in the reference coordinate system into the grinding posture in the workpiece coordinate system according to the coordinate conversion data. For example, the electronic device can weight the coordinates of the processing position in the reference coordinate system according to the coordinate conversion data to obtain the coordinates of the processing position in the workpiece coordinate system. Specifically, g wcs =rotz(-α hori )*O g rcs (25). Among them, O g wcs It is the coordinate of the processing position in the workpiece coordinate system.

[0131] In some embodiments, the coordinate transformation data may be used to rotate the coordinates in the reference coordinate system clockwise around the third-dimensional coordinate axis by the chisel edge angle.

[0132] In this embodiment, the intersection tangent vector of the circular intersection at the midpoint of the intersection is determined; the machining posture of the outer edge of the grinding tool when it passes through the corresponding midpoint of the intersection and the midpoint of the curve is determined based on the cutting angle and the intersection tangent vector. By adaptively adjusting the cutting angle parameter, different machining postures can be obtained, and the angle between the plane where the outer edge of the grinding tool is located and the intersection tangent vector can be adjusted. Then, the grinding tool in different machining postures grinds different drill tip flank areas at the midpoint of the intersection, thereby meeting the structural requirements of different drill tip flanks and improving adaptability.

[0133] In some embodiments, Fig.10 The electronic device can obtain the design values ​​of the various parameters shown in Table 1, execute the method provided in this application, output the tool path file including each grinding posture, and compile the tool path file into a NC program through post-processing, and then use the 3D NC simulation tool to execute the NC program to obtain Fig. 9In the simulation results, the drill bit includes two drill tip flanks and two chip grooves. The area between the chisel edge arc and the circumference intersection line is the drill tip flank. There are two drill tip flanks on the drill bit, and the space edge where the two drill tip flanks intersect is the chisel edge. Figure 3 Medium chord The dotted part of the / 2 mark belongs to the chip groove, so after the chip groove on the drill is ground, Figure 3 Medium chord The dotted part marked with / 2 will be ground off. It can be understood that because the radius of the chisel blade is large, the arc shape of the chisel blade in the simulation result is close to a straight line shape. The method provided in the present application takes into account that the back face of the drill tip is located in the area between the chisel blade arc and the circumference intersection line. By determining the grinding posture when passing through the corresponding intersection points and curve points, the grinding tool can be controlled according to the grinding posture to grind out a partial area of ​​the back face of the drill tip between the corresponding intersection points and curve points, and the back face of the drill tip can be accurately ground between the chisel blade arc and the circumference intersection line, without the need for manual grinding, thereby improving the grinding efficiency.

[0134] Table 1:

[0135]

[0136]

[0137] In Table 1, the errors between the design values ​​and the simulation results are all less than 4%, which verifies the correctness and effectiveness of the method provided in this application.

[0138] In some embodiments, the electronic device can establish a workpiece coordinate system O-XYZ and a reference coordinate system O-X'Y'Z. The arc sine value of the ratio between the chisel edge chord length and the chisel edge diameter is calculated by formula (1) to obtain the angle θ between the radius of the chisel edge arc starting point and the Z axis. chord According to formula (2), the angle θ between the radius of the chisel edge and the radius of the starting point of the chisel edge arc and the Z axis is chord Determine the expression of the chisel edge arc in the reference coordinate system. According to formula (3), the chisel edge radius and the angle θ between the radius of the chisel edge arc starting point and the Z axis are obtained. chordDetermine the coordinates of the starting point of the chisel edge arc in the reference coordinate system. Determine the reference radial vector, reference axial vector and reference tangential vector in the reference posture based on formula (4). Determine the first angle based on the preset multiple and the chisel edge angle based on formula (5). Based on formula (6), rotate the reference radial vector around the reference axial vector by the first angle, rotate the reference tangential vector around the reference axial vector by the first angle, and keep the reference axial vector, to obtain the first radial vector, the first tangential vector and the first axial vector in the first posture. Determine the second angle based on the drill tip angle based on formula (7). Based on formula (8), rotate the first radial vector around the first tangential vector by the second angle, keep the first tangential vector, and rotate the first axial vector around the first tangential vector by the second angle, to obtain the second radial vector, the second tangential vector and the second axial vector in the second posture. Determine the expression of the outer circle of the large end of the grinding wheel in the second posture in the reference coordinate system based on formula (9). Determine the intersection coordinates that simultaneously satisfy the expression of the outer cylindrical surface of the drill bit in the reference coordinate system and the expression of the outer circle of the large end of the grinding wheel in the second posture in the reference coordinate system through the equation group (10). Based on formula (12), the coordinates of the intersection point are rotated around the Z axis by the starting point correction angle to obtain the coordinates of the starting point of the circumferential intersection line in the reference coordinate system. Based on formula (11), the expression of the circumferential intersection line in the reference coordinate system is determined according to the drill radius, the starting point of the circumferential intersection line, the axial back angle and the end point parameters. Based on formula (13), the arc cosine value of the ratio between the inner product of the first projection vector and the second projection vector and the product of the modulus of the first projection vector and the modulus of the second projection vector is calculated to obtain the projection angle. Based on formula (14), the second radial vector is rotated around the Z axis by the projection angle, the second axial vector is rotated around the Z axis by the projection angle, and the second tangential vector is rotated around the Z axis by the projection angle to obtain the feed radial vector, feed axial vector and feed tangential vector in the feed posture. Based on formula (15), the coordinates of the feed position in the feed posture in the reference coordinate system are determined according to the coordinates of the starting point of the chisel edge curve in the reference coordinate system, the radius of the outer circle of the large end of the grinding wheel, the grinding wheel height, the feed radial vector and the feed axial vector. Based on formula (16), the intersection tangent vector is determined according to the rotation angle and axial back angle corresponding to the middle point of the intersection. Based on formula (17), the ratio of the reverse vector from the middle point of the curve to the middle point of the intersection and the distance from the middle point of the intersection to the middle point of the curve is calculated to obtain the direction vector. Based on formula (18), the intermediate axis vector perpendicular to the direction vector and the intersection tangent vector is determined. Based on formula (19), the intermediate axis vector is rotated around the direction vector by the cutting angle to obtain the machining axial vector in the machining posture. Based on formula (20), the intermediate radial vector perpendicular to the direction vector and the machining axis vector is determined. Based on formula (21), the arc sine value of the ratio of the distance from the middle point of the curve to the middle point of the intersection to the outer circle diameter is calculated to obtain the intermediate center angle. Based on formula (22), the intermediate radial vector is rotated around the machining axial vector by the intermediate center angle to obtain the machining radial vector in the machining posture.Based on formula (23), the coordinates of the processing position in the processing posture in the reference coordinate system are determined according to the midpoint of the intersection, the processing radial vector, the radius of the outer circle of the large end of the grinding wheel, the grinding wheel height and the processing axial vector. It can be understood that the feed posture and the processing posture are both calculated in the reference coordinate system. Based on formula (24), the coordinate conversion data from the reference coordinate system to the workpiece coordinate system is determined, and then the feed posture and the processing posture in the reference coordinate system can be converted into the feed posture and the processing posture in the workpiece coordinate system. For example, based on formula (25), the coordinates of the processing position in the reference coordinate system are rotated counterclockwise around the Z axis by the chisel blade angle to obtain the coordinates of the processing position in the workpiece coordinate system, that is, the processing position in the workpiece coordinate system. Therefore, the electronic device can control the grinding wheel in the feed posture in the workpiece coordinate system to grind the back face of the drill tip at the corresponding chisel blade arc starting point and the circumference intersection starting point, and control the grinding wheel in the processing posture to grind the back face of the drill tip at the corresponding midpoint of the curve and the midpoint of the intersection.

[0139] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0140] Based on the same inventive concept, the embodiment of the present application also provides a drill tip flank grinding device for implementing the drill tip flank grinding method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations of one or more drill tip flank grinding device embodiments provided below can refer to the limitations of the drill tip flank grinding method above, and will not be repeated here.

[0141] In an exemplary embodiment, Fig.11 As shown, a drill tip flank grinding device 1100 is provided, comprising: a first acquisition module 1102, a second acquisition module 1104, a determination module 1106 and a grinding module 1108, wherein:

[0142] The first acquisition module 1102 is used to acquire a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located.

[0143] The second acquisition module 1104 is used to acquire the circumferential intersection line; the circumferential intersection line is used to represent the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve.

[0144] The determination module 1106 is used to determine the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point.

[0145] The grinding module 1108 is used to control the grinding tool to grind the back face of the drill tip according to the grinding posture.

[0146] In some embodiments, the transverse blade curve includes a transverse blade arc; the first acquisition module 1102 is used to obtain the transverse blade chord length and the transverse blade radius; the transverse blade chord length is used to characterize the length of the chord corresponding to the transverse blade arc; the transverse blade radius is used to characterize the radius of the circle where the transverse blade arc is located; the transverse blade arc is determined based on the transverse blade chord length and the transverse blade radius.

[0147] In some embodiments, the curve point includes the starting point of the transverse edge curve; the intersection point includes the starting point of the circular intersection line; the second acquisition module 1104 is used to determine the reference posture when the outer edge of the grinding tool passes through the starting point of the transverse edge curve and the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve is perpendicular to the plane where the transverse edge curve is located; determine the first rotation axis parallel to the axial direction of the grinding tool in the reference posture, and rotate the reference posture according to the first rotation axis and the first angle to obtain the first posture; determine the second rotation axis parallel to the tangent of the outer edge of the grinding tool at the starting point of the transverse edge curve in the first posture, and rotate the first posture according to the second rotation axis and the second angle to obtain the second posture; determine the starting point of the circular intersection line according to the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; determine the circular intersection line according to the starting point of the circular intersection line and the geometric parameters of the intersection line.

[0148] In some embodiments, the second acquisition module 1104 is used to determine the intersection of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; rotate the intersection according to the first rotation axis and the starting point correction angle to obtain the starting point of the circular intersection line.

[0149] In some embodiments, the starting point of the transverse edge curve corresponds to the starting point of the circular intersection line; the grinding posture includes the feed posture; a determination module 1106 is used to determine a first projection vector of a straight line passing through the starting point of the transverse edge curve and the intersection point on a projection plane perpendicular to the tool axis, and a second projection vector of a straight line passing through the starting point of the transverse edge curve and the starting point of the circular intersection line on the projection plane; determine a projection angle between the first projection vector and the second projection vector; rotate the second posture according to the first rotation axis and the projection angle to obtain the feed posture when the outer edge of the grinding tool passes through the corresponding starting point of the transverse edge curve and the starting point of the circular intersection line.

[0150] In some embodiments, determination module 1106 is used to determine each curve point on the transverse edge curve that has a different distribution order relative to the starting point of the transverse edge curve; determine each intersection point on the circular intersection line that has a different distribution order relative to the starting point of the circular intersection line; and use the curve points and intersection points corresponding to the same distribution order as corresponding curve points and intersection points.

[0151] In some embodiments, the intersection point includes the midpoint of the intersection; the curve point includes the midpoint of the curve; the grinding posture includes the processing posture; the determination module 1106 is used to determine the intersection tangent vector of the circular intersection at the midpoint of the intersection; the processing posture when the outer edge of the grinding tool passes through the corresponding midpoint of the intersection and the midpoint of the curve is determined according to the cutting angle and the intersection tangent vector; wherein, in the processing posture, the angle between the plane where the outer edge of the grinding tool is located and the intersection tangent vector is related to the cutting angle.

[0152] In some embodiments, the curve point includes the starting point of the transverse edge curve; the intersection point includes the starting point of the circular intersection line; the grinding posture includes the feed posture; the grinding module 1108 is used to control the grinding tool to grind the back surface of the drill tip at the corresponding starting point of the transverse edge curve and the starting point of the circular intersection line according to the feed posture.

[0153] In some embodiments, the curve point includes the curve midpoint; the intersection point includes the intersection midpoint; the grinding posture includes the processing posture. The grinding module 1108 is used to control the grinding tool to grind the drill tip flank at the corresponding curve midpoint and intersection midpoint according to the processing posture.

[0154] Each module in the drill tip flank grinding device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in an electronic device in the form of hardware, or can be stored in a memory in the electronic device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0155] In an exemplary embodiment, an electronic device is provided. The electronic device may be a numerical control machine, and its internal structure diagram may be as shown in FIG. Fig.12As shown. The electronic device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the electronic device is used to exchange information between the processor and an external device. The communication interface of the electronic device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for grinding the back face of a drill tip is implemented. The display unit of the electronic device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the electronic device casing, or an external keyboard, touchpad or mouse.

[0156] Those skilled in the art will understand that Fig.12 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0157] In an exemplary embodiment, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0158] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0159] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0160] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0161] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0162] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for grinding the back face of a drill tip, characterized in that: The method comprises: Obtaining a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located; Obtaining a circumferential intersection line; the circumferential intersection line is used to characterize the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve; Determine the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point; The grinding tool is controlled according to the grinding posture to grind the flank surface of the drill tip.

2. The method according to claim 1, characterized in that The chisel edge curve includes a chisel edge arc; and obtaining the chisel edge curve includes: Obtaining the chisel edge chord length and the chisel edge radius; the chisel edge chord length is used to characterize the length of the chord corresponding to the chisel edge arc; the chisel edge radius is used to characterize the radius of the circle where the chisel edge arc is located; The chisel edge arc is determined according to the chisel edge chord length and the chisel edge radius.

3. The method according to claim 1, characterized in that: The curve point includes the starting point of the chisel edge curve; The intersection point includes a starting point of the circumferential intersection; and obtaining the circumferential intersection includes: Determine a reference posture when the outer edge of the grinding tool passes through the starting point of the chisel edge curve and the tangent line of the outer edge of the grinding tool at the starting point of the chisel edge curve is perpendicular to the plane where the chisel edge curve is located; Determine a first rotation axis parallel to the axial direction of the grinding tool in the reference posture, and rotate the reference posture according to the first rotation axis and a first angle to obtain a first posture; Determine a second rotation axis parallel to the tangent direction of the outer edge of the grinding tool at the starting point of the chisel edge curve in the first posture, and rotate the first posture according to the second rotation axis and the second angle to obtain a second posture; Determine the starting point of the circumferential intersection line according to the intersection point of the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; The circle intersection line is determined according to the circle intersection line starting point and the intersection line geometric parameters.

4. The method according to claim 3, characterized in that The method of determining the starting point of the circumferential intersection line according to the intersection point between the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture comprises: Determine the intersection point between the outer cylindrical surface of the drill bit and the outer edge of the grinding tool in the second posture; The intersection point is rotated according to the first rotation axis and the starting point correction angle to obtain a starting point of a circumferential intersection line.

5. The method according to claim 4, characterized in that The starting point of the chisel edge curve corresponds to the starting point of the circumferential intersection line; the grinding posture includes the feed posture; the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point includes: Determine a first projection vector of a straight line passing through the starting point of the chisel edge curve and the intersection point on a projection plane perpendicular to the tool axis, and a second projection vector of a straight line passing through the starting point of the chisel edge curve and the starting point of the circumferential intersection line on the projection plane; Determine a projection angle between the first projection vector and the second projection vector; The second posture is rotated according to the first rotation axis and the projection angle to obtain a feed posture when the outer edge of the grinding tool passes through the corresponding starting point of the chisel edge curve and the starting point of the circumferential intersection line.

6. The method according to claim 1, characterized in that The method further comprises: Determine each curve point on the chisel edge curve that has a different distribution order relative to the starting point of the chisel edge curve; Determine each intersection point on the circular intersection line that has a different distribution order relative to the starting point of the circular intersection line; The curve points and intersection points corresponding to the same distribution order are regarded as corresponding curve points and intersection points.

7. The method according to any one of claims 1 to 6, characterized in that: The intersection point includes the middle point of the intersection; the curve point includes the middle point of the curve; the grinding posture includes the processing posture; the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point includes: Determine the tangent vector of the circular intersection line at the midpoint of the intersection line; Determine the machining posture of the outer edge of the grinding tool when it passes through the corresponding midpoint of the intersection line and the midpoint of the curve according to the cutting angle and the tangent vector of the intersection line; Wherein, in the machining posture, the angle between the plane where the outer edge of the grinding tool is located and the intersection tangent vector is related to the cutting angle.

8. A drill tip flank grinding device, characterized in that: The device comprises: A first acquisition module is used to acquire a chisel edge curve; the chisel edge curve is used to characterize the curve where the chisel edge is located; The second acquisition module is used to acquire a circumferential intersection line; the circumferential intersection line is used to represent the intersection line between the drill tip flank and the outer cylindrical surface of the drill bit; each intersection point on the circumferential intersection line corresponds to a different curve point on the chisel edge curve; A determination module, used to determine the grinding posture when the outer edge of the grinding tool passes through the corresponding intersection point and curve point; A grinding module is used to control the grinding tool to grind the flank surface of the drill tip according to the grinding posture.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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