CN114918747A

CN114918747A - Method and device for grinding rear face of three-face edge milling cutter and computer equipment

Info

Publication number: CN114918747A
Application number: CN202210540399.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen Xhorse Electronics Co Ltd
Current assignee: Shenzhen Xhorse Electronics Co Ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-08-19

Abstract

The application relates to a method and a device for grinding a rear cutter face of a three-edge milling cutter, computer equipment and a storage medium. The method comprises the following steps: acquiring a target blade profile and a target flank profile of the three-sided blade milling cutter; determining a rear cutter face grinding posture of a grinding wheel for grinding the three-edge milling cutter according to the target edge profile and the target rear cutter face profile; determining a grinding track of the rear cutter face of the grinding wheel according to the grinding posture of the rear cutter face and the profile of the target rear cutter face; and controlling the grinding wheel to grind the rear cutter face according to the grinding attitude of the rear cutter face and the grinding track of the rear cutter face. The method can improve the precision of the three-edge milling cutter obtained by grinding.

Description

Method and device for grinding rear face of three-face edge milling cutter and computer equipment

Technical Field

The present disclosure relates to the field of cutting tool manufacturing, and more particularly, to a method and an apparatus for grinding a flank face of a three-edge milling cutter, a computer device, and a storage medium.

Background

Three-edge milling cutters, as one type of disc-type cutter, are widely used for milling grooves and steps. The three-edge milling cutter has main cutting edges, namely peripheral edges, on the peripheral surface, and auxiliary cutting edges, namely side edges, on two side surfaces, and has the characteristics of sharp cutting edges and light and quick cutting. The three-edge milling cutter is used for grinding, so that the grinding efficiency is improved, and the roughness of the machined surface is reduced. The back cutter face of the three-edge milling cutter is a key structure, the friction between the cutter and a workpiece can be mainly reduced, the influence on the service life of the cutter is great, and the machining quality of the grinding process directly influences the rotation profile precision of the three-edge milling cutter.

The traditional method for grinding the rear cutter face of the three-edge milling cutter is generally carried out in a segmented mode, so that the transition of a connecting area of the rear cutter faces of three edges is not smooth, and the precision of the three-edge milling cutter obtained through grinding is affected.

Disclosure of Invention

In view of the above, it is desirable to provide a face milling cutter grinding method, a face milling cutter grinding apparatus, a computer device, and a storage medium capable of improving the grinding accuracy of the face milling cutter.

A method of flank grinding of a face milling cutter, the method comprising:

acquiring a target cutting edge profile and a target rear cutter face profile of the three-edge milling cutter;

determining a rear cutter face grinding attitude of a grinding wheel for grinding the three-edge milling cutter according to the target blade profile and the target rear cutter face profile;

determining a grinding track of the rear cutter face of the grinding wheel according to the grinding posture of the rear cutter face and the profile of the target rear cutter face;

and controlling the grinding wheel to grind the rear cutter face according to the grinding attitude of the rear cutter face and the grinding track of the rear cutter face.

A flank grinding apparatus of a three-sided edge milling cutter, the apparatus comprising:

the contour acquisition module is used for acquiring a target cutting edge contour and a target rear cutter face contour of the three-edge milling cutter;

the flank grinding attitude determination module is used for determining a flank grinding attitude of a grinding wheel for grinding the three-edge milling cutter according to the target edge profile and the target flank profile;

the rear cutter face grinding track determining module is used for determining a rear cutter face grinding track of the grinding wheel according to the rear cutter face grinding posture and the target rear cutter face profile;

and the control module is used for controlling the grinding wheel to grind the rear cutter face according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face.

A computer device comprising a memory storing a computer program and a processor implementing the steps of the method in the embodiments of the application when executing the computer program.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method described in the embodiments of the application.

According to the method, the device, the computer equipment and the storage medium for grinding the flank face of the three-edge milling cutter, the grinding attitude of the flank face is determined according to the target edge profile and the target flank face profile as the grinding wheel attitude needs to be matched with the edge profile and the flank face profile by acquiring the target edge profile and the target flank face profile of the three-edge milling cutter; determining a grinding track of the rear cutter face according to the grinding posture and the contour of the rear cutter face; the grinding wheel is controlled according to the grinding posture and the grinding track to grind the three-edge milling cutter, various types of three-edge milling cutters can be machined, if the milling cutter with the arc-shaped peripheral edge exists, the grinding posture of the rear cutter face and the grinding track of the rear cutter face can be continuously changed, smooth transition is realized, the precision of the three-edge milling cutter obtained by grinding is improved, and the grinding machining efficiency is further improved.

Drawings

FIG. 1 is a schematic view of a face milling cutter in one embodiment;

FIG. 2 is a partial schematic view of a large face of a face milling cutter according to one embodiment;

FIG. 3 is a schematic flow chart of a flank grinding method of the face milling cutter in one embodiment;

FIG. 4 is a schematic view of an edge profile in the XOZ plane in one embodiment;

FIG. 5 is a schematic representation of a flank profile and an edge profile in XOY plane projection in one embodiment;

FIG. 6 is a schematic illustration of an edge line coordinate system and a workpiece coordinate system in one embodiment;

FIG. 7 is a schematic view of an edge line coordinate system and a workpiece coordinate system in another embodiment;

FIG. 8 is a schematic illustration of grinding wheel grinding in one embodiment;

FIG. 9 is an enlarged schematic view of the grinding wheel of FIG. 8 in accordance with one embodiment;

fig. 10 is a block diagram showing a structure of a face milling cutter grinding apparatus according to an embodiment;

FIG. 11 is a diagram of the internal structure of a computer device in one embodiment.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiments of the present application are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly, and the connection may be a direct connection or an indirect connection.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

In one embodiment, as shown in fig. 1, a schematic view of a face milling cutter in one embodiment. The face milling cutter of fig. 1 is a one-piece face milling cutter including a large end surface 110, a tapered surface 120, and a peripheral edge 130. The large end face is the largest face cutter of the three-face milling cutter. The edge profile 140 refers to a profile of an edge of a three-sided milling cutter. The edge profile 140 is specifically the profile corresponding to the edge of the three-sided milling cutter that first contacts the object. The flank profile 150 refers to the profile on the flank face of a three-face edge milling cutter. The rake face profile refers to a profile on the rake face of a three-face edge milling cutter. It is to be understood that the face milling cutter shown in fig. 1 is only one example, and the face milling cutter grinding method in the present application can also be applied to grinding of other face milling cutters.

Fig. 2 is a partial schematic view of a large end face of a three-edge milling cutter in one embodiment. Included in the figure are rake face 210 and relief face 220. One edge of the rake face 210 is the edge profile and the other edge is the rake face profile. One edge of the flank face 220 is an edge profile and the other edge is a flank face profile.

In one embodiment, a face milling cutter grinding method in the embodiment of the present application is described by taking an example in which the face milling cutter grinding method is applied to a computer apparatus. The computer equipment includes but is not limited to a numerical control machine, a personal computer, a notebook computer, a smart phone, a tablet computer and the like. Fig. 3 is a schematic flow chart illustrating a method for grinding a flank face of a three-sided blade milling cutter according to an embodiment, in which:

step 302, a target edge profile and a target flank profile of the face milling cutter are obtained.

The target edge profile is a profile of an edge of a three-sided milling cutter. The target edge profile specifically includes a large end face side edge profile, a peripheral edge profile, and a tapered face side edge profile. The profile of the large end face side edge blade is a straight line, the profile of the peripheral edge blade is an arc line, and the profile of the conical surface side edge blade is a straight line.

The target flank profile specifically comprises a large end face side edge flank profile, a peripheral edge flank profile and a conical surface side edge flank profile. The profile of the rear cutter face of the side edge of the large end face is a straight line, the profile of the rear cutter face of the peripheral edge is an arc line, and the profile of the rear cutter face of the side edge of the conical surface is a straight line.

Specifically, the target edge profile and the target flank profile may both exist in a matrix form for convenient calculation. The computer device takes the intersection point of the large end surface of the three-edge milling cutter and the axis as an origin, and takes the large end surface as one of the surfaces to establish a workpiece coordinate system. Then the tool face parameter values of the three-face edge milling cutter can be obtained, and the target edge profile and the target flank profile under the workpiece coordinate system are determined according to the tool face parameter values.

Optionally, in the case of grinding the three-edge milling cutter to be sharpened, the numerical control machine tool may obtain a plurality of detection point positions by detecting a plurality of points on the three-edge milling cutter; and determining a target cutting edge profile and a target flank profile according to the positions of the detection points. Wherein, confirm target cutting edge profile and target flank profile respectively according to each probe point position, include: and acquiring a grinding allowance, and determining a target cutting edge profile and a target rear cutter face profile according to each detection point position and the grinding allowance.

The probe point locations may include a cutting edge probe point location and a flank probe point location. The computer device can determine a target edge profile from each edge probe position. And the computer equipment determines the profile of the target flank according to the position of each flank detection point. The edge detection point positions include the end point positions of the large end side edge profile, the positions of points on the peripheral edge profile, and the end point positions of the tapered side edge profile. The flank face detection point position comprises the end point position of the flank face profile of the large end face side edge, the position of a point on the flank face profile of the peripheral edge and the end point position of the flank face profile of the conical face side edge.

The grinding allowance can be set according to the wear condition of the three-edge milling cutter. For example, the grinding allowance may be 0.1 mm. Then, the probe positions can be reduced by 0.1mm from the previous ones. Whereby the portion lacking teeth can be ground off at the time of grinding.

And step 304, determining the grinding posture of the rear face of the grinding wheel for grinding the three-face milling cutter according to the target edge profile and the target rear face profile.

Wherein the grinding wheel for grinding the flank face may be a parallel grinding wheel. The grinding attitude is used to characterize the direction of inclination of the grinding wheel. The grinding attitude may be specifically represented by a vector perpendicular to the large end face of the grinding wheel. And the grinding posture of the rear cutter face is used for representing that the grinding face of the grinding wheel is parallel to the rear cutter face of the three-edge milling cutter.

Specifically, the computer equipment determines a rear cutter face grinding posture parallel to a target rear cutter face according to the target cutting edge profile and the target rear cutter face profile; the flank is a plane that meets both the target edge profile and the target flank profile.

And step 306, determining the grinding track of the flank face of the grinding wheel according to the grinding posture of the flank face and the target flank face profile.

Wherein, the grinding track is used for representing the grinding travel track of the grinding wheel. The grinding path may specifically include the location of the center point of each grinding wheel.

Specifically, according to the grinding posture of the flank face and the profile of the target flank face, the computer equipment determines the position of the central point of each grinding wheel, and the grinding track of the flank face of each grinding wheel is obtained. Specifically, when the grinding wheel moves to a certain point on the profile of the flank, the grinding attitude and the coordinates of the point are known, and the position of the center point of the grinding wheel can be known.

And 308, controlling the grinding wheel to grind the flank according to the grinding attitude of the flank and the grinding track of the flank.

Specifically, the computer equipment can control the grinding wheel to grind on the three-edge milling cutter blank according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face to obtain the rear cutter face. Or the computer equipment can control the grinding wheel to grind on the three-edge milling cutter to be polished according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face to obtain a new rear cutter face.

Optionally, the computer device sends the rear cutter face grinding attitude and the rear cutter face grinding track to the numerical control machine tool, so that the numerical control machine tool controls the grinding wheel to grind the rear cutter face according to the rear cutter face grinding attitude and the rear cutter face grinding track.

According to the method for grinding the rear cutter face of the three-edge milling cutter, the target edge profile and the target rear cutter face profile of the three-edge milling cutter are obtained, and the grinding attitude of the rear cutter face is determined according to the target edge profile and the target rear cutter face profile because the grinding wheel attitude needs to be matched with the edge profile and the rear cutter face profile; determining a grinding track of the rear cutter face according to the grinding posture and the contour of the rear cutter face; the grinding wheel is controlled according to the grinding attitude and the grinding track to grind the three-edge milling cutter, various types of three-edge milling cutters can be machined, if the milling cutter with the arc-shaped peripheral edge exists, the grinding attitude and the grinding track of the rear cutter face can be continuously changed, smooth transition is achieved, the precision of the three-edge milling cutter obtained through grinding is improved, and the grinding machining efficiency is further improved.

In one embodiment, the target flank profile and the target edge profile are both represented in a matrix;

determining a flank grinding attitude of a grinding wheel for grinding a face mill according to a target edge profile and a target flank profile, comprising:

and determining the grinding posture of the rear face of the grinding wheel for grinding the three-face milling cutter according to the difference between the target edge profile and the target rear face profile.

The target edge profile and the target flank profile are expressed in the form of a matrix formed by coordinates of a plurality of points.

Specifically, the computer device determines a flank grinding attitude of a grinding wheel for grinding a three-face milling cutter based on a difference between each edge profile point in the target edge profile and each flank profile point in the target flank profile. The flank grinding attitude can be expressed in vector form. For example, if the target edge profile contains a starting point a and the target flank profile contains a starting point B, then subtracting the coordinates of point B from the coordinates of point a yields the flank grinding attitude at the corresponding point, which can be expressed in vector form.

In the embodiment, the flank face profile and the target edge profile are represented by the matrix, so that the grinding posture of the flank face can be determined according to the difference between the target edge profile and the target flank face profile, the calculation is simple and convenient, and the grinding efficiency is improved.

In one embodiment, determining a flank grinding trajectory of the grinding wheel based on the flank grinding attitude and the target flank profile comprises: acquiring a tangent vector corresponding to the profile of the target rear cutter face; performing cross multiplication on the grinding posture of the rear cutter face and the tangent vector to obtain a cross multiplication result; unitizing the cross multiplication result to obtain a unitized cross multiplication result; and determining the grinding track of the flank of the grinding wheel according to the product of the radius of the grinding wheel and the unitized cross product result and the sum of the product and the target flank.

Wherein, the expression form of the grinding posture of the back tool face and the grinding track of the back tool face are both a matrix of 3 multiplied by N. N depends on the number of points taken on the contour. For example, the end points of the flank profile of the large end face flank edge, the points on the flank profile of the peripheral edge and the end points of the flank surface of the conical surface flank edge are taken.

Specifically, the computer equipment obtains tangent vectors corresponding to each point in the target flank profile, and obtains tangent vectors corresponding to the target flank profile. The flank grinding attitude is a vector. And (4) performing cross multiplication on the grinding posture of the rear cutter face and the tangent vector by the computer equipment to obtain a cross multiplication result. The cross multiplication result is to unitize the cross multiplication result to obtain the unitized cross multiplication result. And the computer equipment determines the grinding track of the rear tool face of the grinding wheel according to the product of the radius of the grinding wheel and the unitized cross product result and the sum of the product and the target rear tool face profile.

In the embodiment, the tangent vector corresponding to the profile of the target flank surface is obtained, namely the trend of the profile is obtained; performing cross multiplication on the grinding attitude and the tangent vector of the rear cutter face, wherein the obtained cross multiplication result is a vector pointing to the central point of the grinding wheel from the origin of a coordinate system; and unitizing the cross multiplication result, and multiplying the cross multiplication result by the radius of the grinding wheel to obtain a matrix formed by vectors with the same length as the radius of the grinding wheel, wherein the sum of the matrix and the target flank profile is equivalent to moving the initial point of the vector with the same length as the radius of the grinding wheel to the tangent point of the grinding wheel and the flank profile, so that the coordinate of the central point of the grinding wheel is determined, the grinding track of the flank of the grinding wheel is further obtained, the calculation is convenient, and the grinding continuity is ensured.

In one embodiment, obtaining a target flank profile of a face milling cutter comprises: acquiring the profile of a rear cutter face under a cutter line coordinate system; the edge line coordinate system takes the circle center of the contour of the peripheral edge as an origin, and the plane of the contour of the peripheral edge is one surface of the edge line coordinate system; converting the profile of the flank face under the edge line coordinate system into a target flank face profile under a workpiece coordinate system; the workpiece coordinate system is established by taking the intersection point of the large end face and the axis as an origin and taking the large end face as one of the faces.

The peripheral edge profile is a profile on the peripheral edge of the three-edge milling cutter. The peripheral edge profile used for establishing the edge line coordinate system can be a knife surface peripheral edge profile or an edge peripheral edge profile. In this embodiment, the center of the circle of the peripheral edge of the blade is used as the origin.

The large end face refers to the large end face of the three-edge milling cutter. Axis means the axis about which the face cutter rotates in use.

Specifically, a cutting edge line coordinate system is established by taking the center of a circle of the peripheral cutting edge profile as an origin and taking a plane where the peripheral cutting edge profile is located as one surface of the cutting edge line coordinate system. Specifically, the center of the circle of the peripheral edge contour may be used as an origin, the plane of the peripheral edge contour may be one of the planes of the edge line coordinate system, and a vector corresponding to the origin and one end point of the peripheral edge contour may be established as one of the coordinate axes of the edge line coordinate system. The edge line coordinate system is a coordinate system for a certain tooth position of the three-sided edge milling cutter.

And establishing a workpiece coordinate system by taking the intersection point of the large end face and the axis as an origin and the large end face as one of the faces. The workpiece coordinate system is a coordinate system for representing the entire three-sided blade milling cutter.

In the embodiment, the tool face profile under the edge line coordinate system is obtained, and the tool face profile can be represented by simple coordinates; and then the tool face profile under the edge line coordinate system is converted into a target rear tool face profile of a point under the workpiece coordinate system, so that the calculation is simple and convenient, the error is not easy to occur, and the efficiency of determining the grinding posture and the grinding track of the rear tool face is improved.

In one embodiment, obtaining a tool face profile in a tool line coordinate system comprises:

acquiring the end point position of the profile of the large end face side edge rear cutter face, the position of a point on the profile of the peripheral edge rear cutter face and the end point position of the profile of the conical surface side edge rear cutter face in a cutter line coordinate system;

integrating the end point position of the profile of the large end face side edge rear cutter face, the position of a point on the profile of the peripheral edge rear cutter face and the end point position of the profile of the conical surface side edge rear cutter face to obtain the cutter face profile under an edge line coordinate system.

The profile of the knife face comprises a profile of a large end face side edge rear knife face, a profile of a peripheral edge rear knife face and a profile of a conical surface side edge rear knife face. The large end face flank relief flank profile refers to the flank profile of the flank at the large end face. The peripheral edge relief flank profile refers to the flank profile on the peripheral edge. The tapered side edge flank profile refers to the profile of the flank face on the side edge of the taper. One of the end point position of the large end face flank profile and the end point position of the tapered face flank profile is the start point of the face profile, and the other is the end point of the face profile.

Specifically, milling cutter parameter values of the three-face edge milling cutter are obtained, and the end point position P of the profile of the flank face of the large end face side edge under the edge line coordinate system is determined according to the milling cutter parameter values _{f_0_b} The position P of a point on the contour of the peripheral flank _{f_r_b} And the end point position P of the profile of the flank of the side edge of the conical surface _{f_3_b} . Wherein the position P of a point on the contour of the peripheral edge flank _{f_r_b} The method comprises an independent variable theta, wherein theta is an arc angle, theta is more than or equal to 0 and less than or equal to pi-delta, and delta is a cone angle of the cutter. And the computer equipment integrates the end point position of the profile of the large end face side edge rear cutter face, the position of a point on the profile of the peripheral edge rear cutter face and the end point position of the profile of the conical surface side edge rear cutter face to obtain the cutter face profile under the edge line coordinate system.

For example, a tool face profile matrix P in the edge line coordinate system _{f_b} ＝(P _{f_0_b} P _{f_r_b} P _{f_3_b} )。P _{f_r_b} In effect, a plurality of dots are shown.

Because the numerically-controlled machine tool generally has a linear interpolation function in the motion between a point and a point, when a grinding straight line is calculated, two points of the straight line from the head to the tail can be taken. If the starting point of the profile of the tool face is P _{f_0_b} ，P _{f_r_b} Get close to P _{f_0_b} The end point of one side can determine the profile of the large end face side edge clearance surface. P is _{f_r_b} Get close to P _{f_3_b} Point of one side, binding P _{f_3_b} The profile of the rear cutter face of the conical surface side edge can be determined. P _{f_r_b} By taking different values of θ, the peripheral edge flank profile can be determined.

In the embodiment, the end point position of the profile of the large end face side edge rear cutter face, the position of the point on the profile of the peripheral edge rear cutter face and the end point position of the profile of the conical surface side edge rear cutter face are integrated to obtain the cutter face profile under the edge line coordinate system, so that a simple cutter face profile model is obtained, and calculation and cutter grinding are facilitated.

In one embodiment, the profile of the tool face in the edge line coordinate system is in the form of a matrix. Converting the flank face profile in the edge line coordinate system to a target flank face profile in the workpiece coordinate system, comprising: acquiring a translation transformation matrix for converting the edge line coordinate system into a workpiece coordinate system; acquiring a rotation transformation matrix for converting the edge line coordinate system into a workpiece coordinate system; and converting the tool surface profile under the edge line coordinate system into a target flank surface profile under the workpiece coordinate system according to the translation transformation matrix and the rotation transformation matrix.

Specifically, the computer device obtains a target flank profile in the workpiece coordinate system from a point multiplication result of the rotation transformation matrix and the flank profile in the edge line coordinate system, which is the sum of the point multiplication result and the translation transformation matrix.

In the embodiment, the tool face profile under the edge line coordinate system is converted into the target rear tool face profile under the workpiece coordinate system through the translation transformation matrix and the rotation transformation matrix, so that the calculation is convenient, and errors are not easy to occur; the target flank profile under the edge line coordinate system is easier to model, and the grinding attitude and the grinding track of the grinding wheel are easier to calculate under the workpiece coordinate system, so that the grinding wheel is suitable for grinding.

In one embodiment, obtaining a target edge profile for a face mill includes: acquiring the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge; and integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical face side edge to obtain a target edge profile.

The blade profile comprises a large end face side blade profile, a peripheral blade profile and a conical surface side blade profile. The large end face side edge blade profile refers to the blade profile of the side edge at the large end face. Peripheral edge profile refers to the edge profile on the peripheral edge. A tapered side edge blade profile refers to a blade profile on the side edge of the taper. One of the end point position of the large end surface side edge profile and the end point position of the tapered surface side edge profile is the start point of the edge profile, and the other is the end point of the edge profile.

Specifically, milling cutter parameter values of a three-edge milling cutter are obtained, and the end point position P of the edge profile of the large-end-face side edge in an edge line coordinate system is determined according to the milling cutter parameter values _{0_b} Position P of a point on the peripheral edge profile _{r_b} And the end point position P of the edge profile of the conical side edge _{3_b} . Wherein the position P of a point on the peripheral edge profile _{r_b} The method comprises an independent variable theta, wherein theta is an arc angle, theta is more than or equal to 0 and less than or equal to pi-delta, and delta is a cone angle of the cutter. And (3) integrating the end point position of the large end face side edge blade, the position of a point on the contour of the peripheral edge blade and the end point position of the contour of the conical side edge blade by the computer equipment to obtain the edge contour under the edge line coordinate system.

For example, a matrix of edge profiles P in the edge line coordinate system _b ＝(P _{0_b} P _{r_b} P _{3_b} )。P _{r_b} In effect, a plurality of dots are represented.

Because the grinding track of the numerical control machine tool between the point and the point is a straight line, a straight line can be determined by taking two points on the straight line. If the starting point of the profile of the knife face is P _{0_b} ，P _{r_b} Get close to P _{0_b} The end point of one side can determine the profile of the large end face side edge clearance surface. P _{r_b} Get close to P _{3_b} Point of one side, binding P _{3_b} The profile of the rear cutter face of the side edge of the conical surface can be determined. P _{f_r_b} By taking different values of θ, the peripheral edge flank profile can be determined.

In the embodiment, the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical face side edge are integrated to obtain the edge profile under an edge line coordinate system, so that a simple edge profile model is obtained, and calculation and tool grinding are facilitated.

In one embodiment, obtaining the position of the end point of the large face side edge profile, the position of the point on the peripheral edge profile, and the position of the end point of the bevel side edge profile comprises: acquiring the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge under an edge line coordinate system;

integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge to obtain a target edge profile, wherein the method comprises the following steps: integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge in an edge line coordinate system to obtain the edge profile in the edge line coordinate system; the edge profile in the edge coordinate system is converted to a target edge profile in the workpiece coordinate system.

In this embodiment, the integration method is similar to the profile of the rear blade, and is not repeated herein. By acquiring the edge profile in the edge line coordinate system, the edge profile can be represented by simple coordinates; and then the edge profile under the edge line coordinate system is converted into a target edge profile of a point under the workpiece coordinate system, so that the calculation is simple and convenient, the error is not easy to occur, and the efficiency of determining the grinding posture and the grinding track is improved.

In one embodiment, converting the edge profile in the edge coordinate system to a target edge profile in the workpiece coordinate system comprises: acquiring a translation transformation matrix for converting a blade line coordinate system into a workpiece coordinate system; acquiring a rotation transformation matrix for converting the edge line coordinate system into a workpiece coordinate system; and converting the back edge profile under the edge line coordinate system into a target back edge profile under the workpiece coordinate system according to the translation transformation matrix and the rotation transformation matrix.

In the embodiment, the blade contour under the blade line coordinate system is converted into the target blade contour under the workpiece coordinate system through the translation transformation matrix and the rotation transformation matrix, so that the calculation is convenient, and errors are not easy to occur; the target edge profile under the edge line coordinate system is easier to model, and the grinding attitude and the grinding track of the grinding wheel are easier to calculate under the workpiece coordinate system, so that the grinding wheel is suitable for grinding.

In one embodiment, obtaining a target edge profile and a target flank profile of a face mill comprises: acquiring an input milling cutter parameter value of the three-edge milling cutter; and determining a target edge profile and a target flank profile according to the milling cutter parameter values.

The milling cutter parameter values comprise one or more of the length of the large end face side edge cutting edge, the arc radius of the peripheral edge cutting edge line, the taper angle of the cutter, the length of the conical surface side edge cutting edge, the width of the rear cutter face of the cutter and the rear angle of the cutter.

Specifically, the computer device acquires milling cutter parameter values of the three-sided edge milling cutter input from the computer device or from the numerical control machine. And respectively calculating a target cutting edge profile and a target rear cutter face profile according to the values of the milling cutter parameters.

In this embodiment, by obtaining the milling cutter parameter value of the input three-edge milling cutter, the target cutting edge profile and the target flank profile of the three-edge milling cutter to be ground can be planned based on the input parameter, so that different three-edge milling cutters can be customized based on different requirements, and the universality of the equipment is improved.

In one embodiment, the method for controlling the grinding wheel to grind the flank face according to the flank face grinding attitude and the flank face grinding trajectory comprises the following steps:

controlling a grinding wheel to grind according to the grinding posture and the grinding track of the rear cutter face to obtain the rear cutter face of the three-edge milling cutter blank;

and rotating the three-blade milling cutter blank by a first preset angle, returning to execute the step of grinding the rear cutter face of the three-blade milling cutter blank according to the grinding posture and the grinding track of the rear cutter face until the rotating angle reaches a second preset angle, and determining that the grinding of the rear cutter face of the three-blade milling cutter blank is finished.

Wherein, the milling cutter blank with three edges can be a disc-shaped milling cutter blank. The first predetermined angle may be an included angle between each of the cutting edges. For example, if the total rotation angle of the entire three-edge milling cutter is 360 and the number of teeth is 90 in total, the first preset angle may be 360/90 ═ 4 degrees. The second preset angle may be 360 degrees. The flank face grinding trajectory includes center position points of a plurality of grinding wheels.

Specifically, the computer equipment controls the grinding wheel to grind the three-edge milling cutter blank according to the grinding posture of the rear cutter face and the corresponding grinding center position of the rear cutter face, so that the rear cutter face of the three-edge milling cutter blank is obtained. The rotation direction may be clockwise or counterclockwise. And the computer equipment rotates the three-face blade milling cutter blank by a first preset angle, the position corresponding to the rotated three-face blade milling cutter blank is also an empty blank, the grinding wheel is controlled to grind at the position according to the grinding posture and the grinding track of the rear cutter face until the rotation angle reaches a second preset angle, and if the rotation angle reaches 360 degrees, all rear cutter faces of the three-face blade milling cutter blank are ground.

In the embodiment, the grinding wheel is controlled to grind according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face to obtain the rear cutter face of the three-edge milling cutter blank, the three-edge milling cutter blank is rotated at a first preset angle and is circularly executed until a second preset angle is reached, the grinding of the rear cutter face of the three-edge milling cutter blank is completed, the continuous change of the grinding posture and the grinding track is realized, and the smooth transition of the rear cutter face is ensured.

In one embodiment, as shown in FIG. 4, a schematic view of the edge profile in the XOZ plane is shown in one embodiment. An edge line coordinate system is defined according to the characteristics of the edge line of the cutter, and a three-edge milling cutter edge profile model and a flank face profile model which are designed in a parameterized manner are provided under the edge line coordinate system.

The plane where the edge profile of the three-edge milling cutter is positioned is X _b O _b Z _b A plane with the center of the circle being the center of the circular arc curve of the peripheral edge, and establishing an edge line coordinate system O _b -X _b Y _b Z _b 。

Under the edge line coordinate system, the starting point P of the edge curve of the side edge of the large end face _{0_b} The coordinates are expressed as:

in the formula, L ₁ Is a large end face side edge blade P _{0_b} P _{1_b} Length of (d); r is the arc radius of the peripheral edge line.

Circular arc blade curve P of peripheral edge _{1_b} P _{2_b} Point P on _{r_b} Is expressed as:

in the formula, the independent variable theta is an arc angle, and delta is a cone angle of the cutter.

Starting point P of conical side edge blade curve _{3_b} The coordinates are expressed as:

wherein

In the formula, L ₂ Is a side edge line P of the conical surface _{2_b} P _{3_b} Of the length of (c).

Integrating the point positions into a blade profile model matrix P _{_b} 。P _{_b} Is composed of

P _{_b} ＝(P _{0_b} P _{r_b} P _{3_b} )

And establishing a blade profile model of the three-edge milling cutter.

As shown in fig. 5, is a schematic diagram of the flank profile and edge profile in XOY plane projection in one embodiment. Included in the figure are a flank profile 150 and an edge profile 140. In the figure, α is the tool relief angle, W _f Is the width of the back face of the cutter.

Starting point P of profile of flank face of side edge of large end face under edge line coordinate system _{f_0_b} The coordinates are expressed as:

in the formula, W _f The width of the rear cutter face of the cutter; alpha is the cutter relief angle.

Contour P of circular arc flank face of peripheral edge _{f_1_b} P _{f_2_b} Point P on _{f_r_b} Is expressed as:

starting point P of profile of rear tool face of conical surface side edge _{f_3_b} The coordinates are expressed as:

wherein

Integrating the point positions into a flank profile model matrix P _{f_b} ，P _{f_b} Is composed of

P _{f_b} ＝(P _{f_0_b} P _{f_r_b} P _{f_3_b} )

And establishing a profile model of the rear cutter face of the three-edge milling cutter.

FIG. 6 is a schematic diagram of an edge line coordinate system and a workpiece coordinate system in one embodiment. Fig. 6 is a schematic view of a side face of a face milling cutter. Fig. 7 is a schematic diagram of an edge line coordinate system and an object coordinate system in another embodiment. Fig. 7 is a schematic view on a large end face. Wherein, the plane of the large end face of the three-edge milling cutter is X _w O _w Y _w A plane with a circle center as the intersection point of the large end face of the three-edge milling cutter and the axis of the cutter, and a workpiece coordinate system O is established _w -X _w Y _w Z _w 。

Translation transformation matrix T for converting edge line coordinate system into workpiece coordinate system _b-w Comprises the following steps:

rotation transformation matrix R for converting edge line coordinate system to workpiece coordinate system _b-w Comprises the following steps:

wherein β is the helix angle of the blade line, R _w The radius of the large end face of the cutter;

the curve model P of the step 1 in the edge line coordinate system _{_b} 、P _{f_b} The method for converting the coordinate system of the workpiece comprises the following steps:

P _{_w} ＝R _b-w *P _{_b} +T _b-w

P _{f_w} ＝R _b-w *P _{f_b} +T _b-w

in the formula, P _{_w} For a model of the edge profile in the workpiece coordinate system, P _{f_w} Is a profile model of the flank face under the coordinate system of the workpiece.

And defining the grinding attitude and the grinding track of the grinding wheel under a workpiece coordinate system, wherein the grinding attitude and the grinding track of the grinding wheel are respectively determined by the vector of the grinding wheel and the position of the central point of the grinding wheel. Fig. 8 is a schematic view of a grinding wheel grinding flank in one embodiment. The circle in fig. 8 is a large end face. FIG. 9 is an enlarged schematic view of the grinding wheel grinding flank of FIG. 8 in one embodiment. Included in fig. 9 are relief surface 220, edge profile 140, and facet profile 150. Grinding attitude of grinding wheel, i.e. grinding wheel vector F _g Comprises the following steps:

F _{_g} ＝P _{_w} -P _{f_w}

grinding track O of grinding wheel _g Comprises the following steps:

O _{_g} ＝P _{f_w} +R _{_g} *(F _{_g} ×T _{f_w} )

in the formula, R _g Radius of grinding wheel, T _{f_w} And the tangent vector of the profile model of the flank face under the tool coordinate system.

At the same time, (F) _{_g} ×T _{f_w} ) The calculation result of the term should be integrated with R _g Multiplication to obtain O _g . Thereby, the grinding track and the grinding posture of the grinding wheel are obtainedState.

In order to check and calculate the proposed algorithm of the sharpening track of the rear cutter face of the three-edge milling cutter, relevant geometric parameters and technological parameters of the rear cutter face of the three-edge milling cutter are input, a cutter position track file of the three-edge milling cutter is output, and an NC (Numerical Control) program of a Numerical Control machine tool is output through post-processing.

The three-dimensional simulation is realized by using Vericut8.0, and the simulation data and results are as follows.

TABLE 1 flank face correlation parameters for three-edge milling cutter

TABLE 2 partial calculation results of flank grinding trajectory and flank grinding attitude

Grinding wheel center point coordinate (track)	Grinding wheel axis vector (namely gesture)
		49.043,9.602,-36.188	0.106,-0.985,-0.128
58.365,7.958,-28.245	0.106,-0.985,-0.128
		58.604,7.955,-28.031	0.108,-0.985,-0.126
59.072,7.951,-27.600	0.110,-0.986-0.124
		59.533,7.947,-27.161	0.112,-0.986,-0.122

Aiming at the problems in the prior art, the method for solving the grinding track of the rear cutter face of the three-edge milling cutter is provided, and the purpose is to realize the grinding of the rear cutter face of the three-edge milling cutter with the peripheral edge and the two side edges which are continuously machined. The algorithm can not only process circular arc-shaped peripheral edges, but also can continuously change the grinding postures of the peripheral edges and the rear cutter faces of the two side edges so as to ensure the smooth transition of the peripheral edges and the rear cutter faces of the two side edges.

In one embodiment, a method of grinding a flank face of a three-sided milling cutter includes:

and (a1) acquiring the milling cutter parameter value of the input three-edge milling cutter.

And a step (a2) of determining the end point position of the contour of the large end face side flank surface, the position of the point on the contour of the peripheral edge flank surface, and the end point position of the contour of the tapered face side flank surface in the edge line coordinate system based on the milling cutter parameter values.

Step (a3) of integrating the end point position of the flank profile of the large end face flank edge, the position of a point on the flank profile of the peripheral edge and the end point position of the flank profile of the conical face flank edge to obtain a flank profile in an edge line coordinate system; the edge line coordinate system takes the center of a circle of the peripheral edge contour as an origin, and the plane of the peripheral edge contour is one of the surfaces of the edge line coordinate system.

And (a4) acquiring a translation transformation matrix for converting the edge line coordinate system into the workpiece coordinate system.

And (a5) acquiring a rotation transformation matrix for converting the edge line coordinate system into the workpiece coordinate system.

Step (a6), according to the translation transformation matrix and the rotation transformation matrix, the profile of the flank face under the edge line coordinate system is converted into the profile of the target flank face under the workpiece coordinate system; the workpiece coordinate system is established by taking the intersection point of the large end face and the axis as an origin and taking the large end face as one of the faces.

And (a7) acquiring the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical face side edge in the edge line coordinate system.

And (a8) integrating the end point position of the edge profile of the large end face side edge, the position of the point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical side edge in the edge line coordinate system to obtain the edge profile in the edge line coordinate system.

And (a9) converting the edge profile in the edge coordinate system into a target edge profile in the workpiece coordinate system.

Step (a10) of determining a flank grinding attitude of a grinding wheel for grinding a three-edged milling cutter on the basis of the difference between the target edge profile and the target flank profile; the target flank profile and the target edge profile are both represented in a matrix.

And (a11) acquiring a tangent vector corresponding to the target flank profile.

And (a12) performing cross multiplication on the flank face grinding attitude and the tangent vector to obtain a cross multiplication result.

And (a13) unitizing the cross product result to obtain a unitized cross product result.

And a step (a14) of determining the flank grinding trajectory of the grinding wheel from the product of the grinding wheel radius and the unitized cross product result and the sum of the product and the target flank profile.

And (a15) controlling the grinding wheel to grind according to the grinding posture and the grinding track of the rear cutter face to obtain the rear cutter face of the three-edge milling cutter blank.

And (a16) rotating the three-face milling cutter blank by a first preset angle, returning to execute the step of grinding according to the grinding posture and the grinding track of the rear cutter face to obtain the rear cutter face of the three-face milling cutter blank until the rotation angle reaches a second preset angle, and determining that the grinding of the rear cutter face of the three-face milling cutter blank is finished.

In the embodiment, the grinding posture of the rear cutter face is determined according to the target edge profile and the target rear cutter face profile by acquiring the target edge profile and the target rear cutter face profile of the three-edge milling cutter; determining a grinding track of the rear cutter face according to the grinding posture and the profile of the rear cutter face; the grinding wheel is controlled according to the grinding attitude and the grinding track to grind the three-edge milling cutter, various types of three-edge milling cutters can be machined, if the milling cutter with the arc-shaped peripheral edge exists, the grinding attitude and the grinding track of the rear cutter face can be continuously changed, smooth transition is achieved, the precision of the three-edge milling cutter obtained through grinding is improved, and the grinding machining efficiency is improved.

It should be understood that, although the steps in the flowchart of fig. 3 described above are sequentially displayed as indicated by arrows, and the steps in the steps (a1) to (a16) are sequentially displayed as indicated by reference numerals, the steps are not necessarily performed sequentially in the order indicated by the arrows or numerals. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.

In one embodiment, as shown in fig. 10, a block diagram of a flank face grinding device of a three-edged milling cutter in one embodiment is shown. Fig. 10 provides a flank grinding apparatus of a three-sided milling cutter, which can be a part of a computer device using a software module or a hardware module, or a combination of the two, and specifically includes: a profile acquisition module 1002, a flank grinding attitude determination module 1004, a flank grinding trajectory determination module 1006, and a control module 1008, wherein:

the contour acquisition module 1002 is used for acquiring a target cutting edge contour and a target rear cutting face contour of the three-edge milling cutter;

a flank grinding attitude determination module 1004 for determining a flank grinding attitude of a grinding wheel for grinding a three-edge milling cutter according to the target edge profile and the target flank profile;

a flank grinding trajectory determining module 1006, configured to determine a flank grinding trajectory of the grinding wheel according to the flank grinding attitude and the target flank profile;

and the control module 1008 is used for controlling the grinding wheel to grind the rear cutter face according to the grinding attitude of the rear cutter face and the grinding track of the rear cutter face.

According to the rear cutter face grinding device of the three-edge milling cutter, the target cutting edge profile and the target rear cutter face profile of the three-edge milling cutter are obtained, and the grinding wheel posture needs to be matched with the cutting edge profile and the cutter face profile, so that the grinding posture of the rear cutter face is determined according to the target cutting edge profile and the target rear cutter face profile; determining a grinding track of the rear cutter face according to the grinding posture and the contour of the rear cutter face; the grinding wheel is controlled according to the grinding posture and the grinding track to grind the three-sided edge milling cutter, various types of three-sided edge milling cutters can be machined, if the milling cutter with the circular arc-shaped peripheral edge exists, the continuous transformation of the grinding posture of the rear cutter face and the grinding track of the rear cutter face can be realized, the smooth transition is realized, the precision of the three-sided edge milling cutter obtained by grinding is improved, and the grinding machining efficiency is further improved.

In one embodiment, the flank grinding attitude determination module 1004 is configured to determine a flank grinding attitude of a grinding wheel for grinding a face mill based on a difference between the target edge profile and the target flank profile.

In one embodiment, the flank grinding trajectory determining module 1006 is configured to obtain a tangent vector corresponding to the target flank profile; performing cross multiplication on the grinding posture of the rear cutter face and the tangent vector to obtain a cross multiplication result; unitizing the cross multiplication result to obtain a unitized cross multiplication result; and determining the grinding track of the flank of the grinding wheel according to the product of the radius of the grinding wheel and the unitized cross product result and the sum of the product and the profile of the target flank.

In the embodiment, a tangent vector corresponding to the profile of the target flank surface is obtained, namely the trend of the profile is obtained; performing cross multiplication on the grinding posture of the rear cutter face and the tangent vector to obtain a cross multiplication result, namely a vector of the origin of the coordinate system pointing to the central point of the grinding wheel; the cross multiplication result is unitized, and then multiplied by the radius of the grinding wheel, so that a matrix formed by vectors with the same length as the radius can be obtained, the sum of the matrix and the target profile is equivalent to moving the starting point of the vector with the same length as the radius to the tangent point of the grinding wheel and the profile of the flank, thereby determining the coordinate of the central point of the grinding wheel, further obtaining the grinding track of the flank of the grinding wheel, and ensuring the grinding continuity.

In one embodiment, the profile acquisition module 1002 is configured to acquire a flank profile in a blade line coordinate system; the edge line coordinate system takes the center of a circle of the peripheral edge contour as an origin, and the plane of the peripheral edge contour is one of the surfaces of the edge line coordinate system; converting the profile of the rear cutter face under the edge line coordinate system into a target rear cutter face profile under a workpiece coordinate system; the workpiece coordinate system is established by taking the intersection point of the large end face and the axis as an origin and taking the large end face as one of the faces.

In one embodiment, the profile acquiring module 1002 is configured to acquire an end point position of a large end face flank profile, a position of a point on a peripheral flank profile, and an end point position of a conical face flank profile in an edge line coordinate system; integrating the end point position of the profile of the large end face side edge rear cutter face, the position of a point on the profile of the peripheral edge rear cutter face and the end point position of the profile of the conical surface side edge rear cutter face to obtain the cutter face profile under an edge line coordinate system.

In this embodiment, the end point position of the profile of the large end face side blade flank, the position of the point on the profile of the peripheral blade flank and the end point position of the profile of the conical surface side blade flank are integrated to obtain the profile of the blade face in the blade line coordinate system, so as to obtain a simple profile model of the blade face, which is convenient for calculation and tool grinding.

In one embodiment, the profile acquisition module 1002 is configured to acquire a translation transformation matrix that transforms the edge line coordinate system to the workpiece coordinate system; acquiring a rotation transformation matrix for converting the edge line coordinate system into a workpiece coordinate system; and converting the tool surface profile under the edge line coordinate system into a target flank surface profile under the workpiece coordinate system according to the translation transformation matrix and the rotation transformation matrix.

In one embodiment, profile acquisition module 1002 is configured to acquire the end point position of the large face side edge profile, the position of a point on the peripheral edge profile, and the end point position of the bevel side edge profile; and integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge to obtain the target edge profile.

In this embodiment, the end point position of the edge profile of the large end face side edge, the position of the point on the edge profile of the peripheral edge, and the end point position of the edge profile of the tapered side edge are integrated to obtain the edge profile in the edge line coordinate system, so as to obtain a simple edge profile model, which is convenient for calculation and tool grinding.

In one embodiment, profile acquisition module 1002 is configured to acquire the position of an end point of a large end side edge profile, the position of a point on a peripheral edge profile, and the position of an end point of a tapered side edge profile in an edge line coordinate system; integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge in an edge line coordinate system to obtain the edge profile in the edge line coordinate system; the edge profile in the edge coordinate system is converted to a target edge profile in the workpiece coordinate system.

In this embodiment, by acquiring the edge profile in the edge line coordinate system, the edge profile can be expressed by a simple coordinate; and the blade profile under the blade line coordinate system is converted into the target blade profile of a point under the workpiece coordinate system, so that the calculation is simple and convenient, the error is not easy to occur, and the efficiency of determining the grinding attitude and the grinding track is improved.

In one embodiment, the control module 1008 is configured to control the grinding wheel to grind according to the flank grinding attitude and the flank grinding trajectory, so as to obtain a flank of the three-edge milling cutter blank; and rotating the three-edge milling cutter blank by a first preset angle, returning to execute grinding of the rear cutter face of the three-edge milling cutter blank according to the grinding posture and the grinding track of the rear cutter face until the rotation angle reaches a second preset angle, and determining that the grinding of the rear cutter face of the three-edge milling cutter blank is finished.

In this embodiment, the grinding wheel is controlled to grind according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face to obtain the rear cutter face of the three-edge milling cutter blank, the three-edge milling cutter blank is rotated by a first preset angle and is circularly executed until a second preset angle is reached, the grinding of the rear cutter face of the three-edge milling cutter blank is completed, the continuous conversion of the grinding posture and the grinding track is realized, and the smooth transition of the rear cutter face is ensured.

The specific definition of the flank face grinding device of the three-edge milling cutter can be referred to the definition of the flank face grinding method of the three-edge milling cutter, and the detailed description is omitted here. Each module in the above flank grinding device of the three-edged milling cutter can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a terminal device, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile 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 operating system and the computer program to run on the non-volatile storage medium. The communication interface of the computer device is used for communicating with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a flank face grinding method of a face milling cutter. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory in which a computer program is stored and a processor, which when executing the computer program performs the steps of the above-described method embodiments.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

In one embodiment, a computer program product or computer program is provided that includes computer instructions stored in a computer readable storage medium. The computer instructions are read by a processor of the computer device from the computer-readable storage medium, and the computer instructions are executed by the processor to cause the computer device to perform the steps in the above-described method embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A method of grinding a flank face of a face milling cutter, the method comprising:

acquiring a target blade profile and a target flank profile of the three-sided blade milling cutter;

determining a flank grinding attitude of a grinding wheel for grinding the three-edge milling cutter according to the target edge profile and the target flank profile;

and controlling the grinding wheel to grind the rear cutter face according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face.

2. The method of claim 1, wherein said determining a flank grinding attitude of a grinding wheel for grinding the face mill based on the target edge profile and the target flank profile comprises:

and determining the grinding posture of the rear cutter face of the grinding wheel for grinding the three-edge milling cutter according to the difference between the target edge profile and the target rear cutter face profile.

3. The method of claim 1, wherein determining a flank grinding trajectory of the grinding wheel based on the flank grinding attitude and the target flank profile comprises:

acquiring a tangent vector corresponding to the profile of the target flank;

performing cross multiplication on the grinding posture of the rear cutter face and the tangent vector to obtain a cross multiplication result;

unitizing the cross multiplication result to obtain a unitized cross multiplication result;

and determining the grinding track of the flank of the grinding wheel according to the product of the radius of the grinding wheel and the unitized cross product result and the sum of the product and the profile of the target flank.

4. The method of claim 1, wherein obtaining a target flank profile of a face milling cutter comprises:

acquiring a profile of a rear cutter face under a cutter line coordinate system; the edge line coordinate system takes the circle center of the peripheral edge contour as an origin, and the plane of the peripheral edge contour is one of the surfaces of the edge line coordinate system;

converting the profile of the flank face under the edge line coordinate system into a target flank face profile under a workpiece coordinate system; the workpiece coordinate system is established by taking the intersection point of the large end face and the axis as an origin and taking the large end face as one of the faces.

5. The method of claim 4, wherein the obtaining the flank profile in the edge line coordinate system comprises:

and integrating the end point position of the profile of the large end face side blade rear cutter face, the position of a point on the profile of the peripheral blade rear cutter face and the end point position of the profile of the conical surface side blade rear cutter face to obtain the profile of the rear cutter face under an edge line coordinate system.

6. The method of claim 4, wherein the flank profile in the edge line coordinate system is in the form of a matrix;

the converting the flank surface profile in the edge line coordinate system to a target flank surface profile in a workpiece coordinate system includes:

acquiring a translation transformation matrix for converting the edge line coordinate system into the workpiece coordinate system;

acquiring a rotation transformation matrix for converting the edge line coordinate system into the workpiece coordinate system;

and converting the profile of the flank under the edge line coordinate system into a target profile of the flank under a workpiece coordinate system according to the translation transformation matrix and the rotation transformation matrix.

7. The method of claim 1, wherein said obtaining a target edge profile of a face mill comprises:

acquiring the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical surface side edge;

and integrating the end point position of the edge profile of the large end face side edge, the position of a point on the edge profile of the peripheral edge and the end point position of the edge profile of the conical side edge to obtain a target edge profile.

8. The method of claim 1, wherein said obtaining a target edge profile and a target flank profile of a face mill comprises:

acquiring an input milling cutter parameter value of the three-edge milling cutter;

and determining a target edge profile and a target flank profile according to the milling cutter parameter values.

9. The method according to any one of claims 1 to 8, wherein the controlling the grinding wheel to perform flank grinding according to the flank grinding attitude and the flank grinding trajectory includes:

controlling a grinding wheel to grind according to the grinding attitude of the rear cutter face and the grinding track of the rear cutter face to obtain a rear cutter face of a three-edge milling cutter blank;

and rotating the three-edge milling cutter blank by a first preset angle, returning to execute the step of grinding the rear cutter face of the three-edge milling cutter blank according to the grinding posture of the rear cutter face and the grinding track of the rear cutter face until the rotation angle reaches a second preset angle, and determining that the grinding of the rear cutter face of the three-edge milling cutter blank is finished.

10. A flank grinding device for a three-sided edge milling cutter, the device comprising:

11. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 9 when executing the computer program.

12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 9.