CN116787241A - Flat drill grinding method, flat drill grinding device, numerical control machine and storage medium - Google Patents

Abstract

This application relates to a flat drill grinding method, device, CNC machine and storage medium. The flat drill grinding method includes: controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface; controlling the grinding tool to grind the tool based on the target rake surface. In the grinding posture of the rake face perpendicular to the surface, grind the tool to be ground along the direction indicated by the cutting edge line to obtain the target flat drill. This method can improve the accuracy of flat drill grinding.

Description

Flat drill grinding method, device, CNC machine and storage medium

Technical field

The present application relates to the field of computer technology, in particular to a flat drill grinding method, device, CNC machine and storage medium.

Background technique

The flat drill is a drilling tool with simple structure and low manufacturing cost. The integrated flat drill is mainly used for micro hole processing and is widely used in the processing of materials with medium hardness such as aluminum and copper. At present, most research on flat drill manufacturing focuses on manual-assisted grinding. With the upgrading of industrial manufacturing, CNC is more widely used in tool grinding. The traditional flat drill grinding method has the problem of inaccurate grinding.

Contents of the invention

Based on this, it is necessary to provide a flat drill grinding method, device, CNC machine and storage medium that can improve grinding accuracy in response to the above technical problems.

A flat drill grinding method, the method includes:

The grinding tool is controlled to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface;

The grinding tool is controlled to grind the tool to be ground along the direction indicated by the cutting edge line based on the rake surface grinding attitude perpendicular to the target rake surface to obtain the target flat drill.

A flat drill grinding device, the device includes:

The flank grinding module is used to control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface;

A rake face grinding module, used to control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the rake face grinding attitude perpendicular to the target rake face, To get the target flat drill.

A CNC machine includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, it implements the steps of each flat drill grinding method embodiment.

A computer-readable storage medium has a computer program stored thereon. When the computer program is executed by a processor, the steps of each flat drill grinding method embodiment are implemented.

The above flat drill grinding method, device, CNC machine and storage medium control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface. The controlled grinding tool is based on the rake surface grinding posture perpendicular to the target rake surface, and grinds the tool to be ground along the direction indicated by the cutting edge line. The grinding of the front and rear blade surfaces is based on the cutting edge line as a reference, ensuring The performance of the flat drill cutting edge can be obtained by grinding a flat drill with a relatively simple operation, which has high accuracy and does not affect the performance of the tool.

Description of the drawings

Figure 1 is an application environment diagram of the flat drill grinding method in one embodiment;

Figure 2 is a schematic diagram of a coordinate system in an embodiment;

Figure 3 is a schematic diagram of relevant parameters of a flat drill in an embodiment;

Figure 4 is a schematic flow chart of a flat drill grinding method in one embodiment;

Figure 5 is a schematic diagram of the grinding posture of the rake surface perpendicular to the rake surface of the main cutting section in one embodiment;

Figure 6 is a schematic view of the flank grinding posture of the main cutting edge segment in one embodiment;

Figure 7 is a schematic diagram of the grinding of the flank surface of the main cutting edge segment in one embodiment;

Figure 8 is a schematic diagram of the grinding of the flank surface of the secondary cutting edge segment in one embodiment;

Figure 9 is a schematic diagram of the center point of the grinding tool rotating through a preset angle in one embodiment;

Figure 10 is a simulation image of a target flat drill in one embodiment;

Figure 11 is a structural block diagram of a flat drill grinding device in one embodiment;

Figure 12 is an internal structural diagram of a CNC machine in one embodiment.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relationship between components in a specific posture (as shown in the drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly. The connection may be a direct connection or an indirect connection.

In addition, descriptions such as "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

As used herein, the terms "first," "second," etc. may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first axis may be referred to as a second axis, and similarly, a second axis may be referred to as a first axis, without departing from the scope of the present application. Both the first axis and the second axis are coordinate axes, but they are not the same coordinate axis.

It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have the transmission of electrical signals or data between each other.

The chip groove grinding method provided by this application can be applied in the application environment as shown in Figure 1. Figure 1 is an application environment diagram of the flat drill grinding method in one embodiment. Figure 1 includes a CNC machine 100, and the CNC machine 100 includes a grinding tool 110. The grinding tool 110 is used for grinding the tool 120 to be ground.

In one embodiment, the cutting part of the flat drill is generally flat or spade-shaped. First, a coordinate system is established to facilitate description and calculation, as shown in Figure 2, which is a schematic diagram of the coordinate system in one embodiment. The Z-axis direction is the direction of the tool axis, the X-axis direction is parallel to the main cutting edge, the Y-axis direction is the thickness direction of the cutting part, and the origin is at the center of the top. For the convenience of description, the relevant parameters of the flat drill are defined. As shown in Figure 3, it is a schematic diagram of relevant parameters of a flat drill in one embodiment. The relevant parameters are: top tip angle 2θ, main cutting edge clearance angle α ₁ , main cutting edge clearance angle γ ₁ , secondary cutting edge clearance angle α ₂ , secondary cutting edge clearance angle γ ₂ , cutting part thickness 2H, working end length L, tool radius R. In addition, other parameters include the grinding wheel radius R _g and the grinding wheel angle δ. Flat drills can be divided into main cutting edges and secondary cutting edges according to the edge line. The cutting edge is formed by the intersection of the rake face and the flank face, so its manufacturing is divided into front and rear face grinding of different blade segments. The triangular solid part is the main cutting edge segment, and the cubic part below is the auxiliary cutting edge segment. The cutting edges in Figure 3 include major cutting edges P ₁ P ₂ and minor cutting edges P ₂ P ₃ . The cutting edge refers to the blade that is mainly used to cut objects during the use of flat drills, and has a greater impact on the performance of the tool. The edge line of the main cutting edge is called the main cutting edge line, and the edge line of the minor cutting edge is called the minor cutting edge line. In each embodiment of this application, processing and calculation are performed based on the cutting edge. The shaded part in Figure 3 is the flank surface. The flank surface located in the main cutting edge segment is called the main cutting edge segment flank surface, and the flank surface located in the minor cutting edge segment is called the minor cutting edge segment flank surface.

As shown in Figure 4, it is a schematic flow chart of a flat drill grinding method in one embodiment. It is explained by taking the application to a CNC machine as an example and includes the following steps:

Step 402: Control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface.

Among them, abrasive tools are tools used for grinding, grinding, and polishing. The abrasive tool may be a grinding wheel. In each embodiment of the present application, a grinding wheel is taken as an example for description. The target flank refers to the flank that is expected to be ground, that is, the final flank of the target flat drill. The flank grinding posture refers to the posture of the grinding tool when grinding the flank surface. For example, the flank grinding posture can be represented by the grinding tool axis vector. Taking the grinding tool as a grinding wheel as an example, the grinding tool axis vector is the orientation of the grinding wheel axis.

The tool to be ground can be a tool blank. The tool blank can be a cubic bar stock. The tool to be ground may also be a tool that has been shaped, and the flat drill grinding method in the embodiment of the present application is used to grind the tool.

Specifically, the initial flank surface attitude is set in the CNC machine, and the initial flank surface attitude is rotated around the corresponding axis by a relief angle to obtain a flank grinding attitude perpendicular to the target flank surface. The CNC machine obtains the cutting edge line and determines the tangent vector of the cutting edge line. Then, the CNC machine controls the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line, that is, the tangential vector of the cutting edge line, based on the flank grinding attitude perpendicular to the target flank surface.

Step 404: Control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the rake surface grinding attitude perpendicular to the target rake surface to obtain the target flat drill.

Among them, the target rake surface refers to the rake surface expected to be ground, that is, the final rake surface of the target flat drill. The rake face grinding attitude refers to the attitude of the grinding tool when grinding the rake face. For example, the rake face grinding posture can be represented by the grinding tool axis vector.

Specifically, the initial rake face attitude is set in the CNC machine, and the initial rake face attitude is rotated by the rake angle around the corresponding axis to obtain the rake face grinding attitude perpendicular to the target rake face. The CNC machine obtains the cutting edge line and determines the tangent vector of the cutting edge line. Then, the CNC machine controls the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line, that is, the tangential vector of the cutting edge line, based on the rake surface grinding attitude perpendicular to the target rake surface.

It can be understood that the grinding order of the rake surface and the flank surface is not limited. You can grind the flank surface first, and then grind the rake surface; you can also grind the rake surface first, and then grind the flank surface.

The above-mentioned flat drill grinding method grinds the tool to be ground along the direction indicated by the cutting edge line by controlling the grinding tool based on the flank grinding attitude perpendicular to the target flank surface. The control grinding tool is based on the target rake surface. The grinding posture of the rake face is perpendicular to the surface, and the tool to be ground is ground along the direction indicated by the cutting edge line. The grinding of the front and rear blade surfaces is based on the cutting edge line, which ensures the performance of the flat drill cutting edge. A relatively simple grinding operation produces a flat drill with high accuracy and does not affect the performance of the tool.

In one embodiment, the flat drill grinding method further includes: obtaining the relief angle of the target flank surface; rotating the initial flank grinding attitude around the corresponding axis through the relief angle to obtain a relief angle perpendicular to the target flank surface. Face grinding attitude; obtain the rake angle of the target rake face; rotate the initial rake face grinding attitude by the rake angle around the corresponding axis to obtain the rake face grinding attitude perpendicular to the target rake face.

Among them, the relief angle refers to the inclination angle of the flank surface. The rake angle refers to the inclination angle of the rake face. The CNC machine can set the initial flank grinding posture and the initial rake surface grinding posture. And the initial flank grinding posture and the initial rake surface grinding posture may be the same or different.

Specifically, the CNC machine can set the X-axis direction as the initial flank grinding posture, and rotate the relief angle around the Y-axis direction to obtain a flank grinding posture perpendicular to the target flank surface. The CNC machine can set the Y-axis direction as the initial rake surface grinding posture, and rotate the rake angle around the Z-axis to obtain a rake surface grinding posture perpendicular to the target rake surface.

For example, FIG. 5 is a schematic diagram of the grinding posture of the rake surface perpendicular to the rake surface of the main cutting section in one embodiment. Figure 5 includes the main cutting edge rake angle γ ₁ . The rake face grinding attitude F _g2 perpendicular to the rake face of the main cutting section is regarded as the positive Y-axis vector (i.e. the second initial axis vector) and the tangent vector T around the main cutting edge line P1P2 rotates the main cutting edge rake angle counterclockwise. γ ₁ . The grinding wheel moves and grinds along the main cutting edge in the grinding posture F _g2 of the rake face of the main cutting section to form the rake face. The rake face grinding attitude F _g2 perpendicular to the rake face of the main cutting edge segment:

The minor cutting edge line trajectory is a straight line P2P3, the starting point is P2, the end point is P3, and the tangent vector T3 of P2P3 is the Z-axis negative direction vector, so there is:

Rotate the positive vector of the X-axis (i.e., the third initial axis vector) around the Z-axis direction through the minor cutting edge relief angle α ₂ to obtain the flank grinding posture F _g3 perpendicular to the flank surface of the minor cutting section:

Rotate the vector in the positive direction of the Y axis (i.e., the fourth initial axis vector) counterclockwise around the Z axis by the rake angle γ ₂ of the minor cutting edge to obtain the rake face grinding attitude F _g4 perpendicular to the rake face of the minor cutting section:

It can be understood that the CNC machine can obtain the flank grinding posture through computer program calculation, and then control the grinding tool to grind based on the flank grinding posture; it can also control the grinding tool to the first initial axis vector. The flank grinding posture is obtained after the posture is rotated around the corresponding axis. The same applies to the front blade, so I won’t go into details here.

In this embodiment, by rotating the initial flank grinding posture around the corresponding axis by the relief angle, a flank grinding posture perpendicular to the target flank surface is obtained, and the initial rake surface grinding posture is rotated around the corresponding axis. Rotate the rake angle to obtain a rake surface grinding posture perpendicular to the target rake surface, which can ensure the accuracy of the grinding posture and flat drill performance.

In one embodiment, rotating the initial flank grinding posture around the corresponding axis to obtain the flank grinding posture perpendicular to the target flank includes: rotating the first initial axis vector around the grinding tool's own coordinate system The first axis rotates the relief angle of the main cutting edge and the angle related to the flat drill tip angle rotates around the second axis to obtain a flank grinding attitude perpendicular to the flank surface of the main cutting edge segment.

In the embodiment of the present application, the first axis is the X-axis in Figure 1 and the second axis is the Y-axis in Figure 1 as an example for description. It can be understood that the directions of the coordinate system axes can be set independently. The first axis can also be called the Y axis, and the second axis can also be called the X axis. The angle related to the flat drill tip angle is used to indicate the inclination angle of the flank surface of the main cutting edge segment.

Specifically, the CNC machine inputs the main cutting edge relief angle and the first axis, that is, the X-axis, into the rotation matrix of the vector rotating around the axis, and inputs the relevant angle of the flat drill tip angle and the second axis into the rotation matrix of the vector rotating around the axis. , and then multiplied by the first initial axis vector to obtain the flank grinding posture perpendicular to the flank surface of the main cutting edge segment.

It can be understood that the order of rotating the main cutting edge relief angle around the first axis of the grinding tool's own coordinate system and the angles related to the flat drill tip angle around the second axis is not limited.

Then, as shown in Figure 6, it is a schematic diagram of the posture of flank grinding of the main cutting edge segment in one embodiment. During grinding, the attitude of the grinding wheel remains unchanged, that is, the grinding wheel axis vector is kept perpendicular to the flank surface, and the grinding wheel axis vector can be regarded as the initial attitude for rotation transformation. As shown in Figure 6, assuming that the first initial axis vector is the positive direction of the Z-axis, first rotate through the (90-θ) angle around the Y-axis, and then rotate the main cutting edge relief angle α ₁ around the X-axis of its own coordinate system. At this time, it is The final appearance of the grinding wheel.

The rotation matrix of a known vector rotating around an axis is expressed as:

Where A is the rotation axis vector, ω is the rotation angle, vers(ω)=1-cosω.

Then the flank grinding posture F _g1 perpendicular to the flank surface of the main cutting edge segment is

In this embodiment, the first initial axis vector is rotated around the first axis of the grinding tool's own coordinate system by the main cutting edge relief angle and the angle related to the flat drill tip angle is rotated around the second axis to obtain the relative angle to the main cutting edge segment relief surface. The vertical flank grinding attitude ensures grinding accuracy and flat drill performance.

In one embodiment, grinding the tool to be ground along the direction indicated by the cutting edge line includes: obtaining the grinding tool parameter value, the end point of the cutting edge line, and the tangent vector of the cutting edge line; based on the grinding tool parameter value, cutting edge line The endpoint of the edge line and the tangent vector of the cutting edge line determine the initial position of the grinding tool when the grinding tool is located at the end point of the cutting edge line; move the cutting edge line length parameter from the initial position of the grinding tool in the direction indicated by the tangent vector of the cutting edge line , grinding the tool to be ground.

Among them, the method in this embodiment can be applied to the main cutting section flank surface, the auxiliary cutting section flank surface, and the auxiliary cutting edge section rake surface. Taking the grinding tool as a grinding wheel as an example, the grinding tool parameter value can be the grinding wheel radius. The end point of the cutting edge line can be the starting point or the end point.

Specifically, for the grinding tool center point trajectory of the main cutting edge flank surface:

The two points P1 and P2 of the main cutting edge determine the edge line trajectory. The grinding path of the grinding wheel can be regarded as the grinding wheel cutting from point P1 to point P2 on the flank plane. It is required that the entire flank surface is in complete contact with the end face of the grinding wheel at point P2. The tangential vector T of the main cutting edge line P1P2 can be determined based on the top sharp angle 2θ.

Figure 7 is a schematic diagram of the grinding of the flank surface of the main cutting edge segment in one embodiment. The position of the center point of the grinding tool can be regarded as the point P on the edge line extending the radius distance of the grinding wheel along the direction of the edge line. The grinding wheel moves P1P2 distance along the edge line direction, and the center point Og1 moves toward Og2 during grinding. In order to prevent grinding failure due to edge wear of the grinding wheel, the grinding track can be appropriately extended by distance J. The grinding tool center point trajectory Og on the flank surface of the main cutting edge segment is as follows:

Og1＝P1-T*R _g

Og=Og1+T*K,

That is, the cutting edge line length parameter K is moved from the initial position Og1 of the grinding tool along the direction indicated by the tangent vector T of the cutting edge line.

For the grinding wheel center path of the secondary cutting edge flank:

The flank edge line trajectory is a straight line P2P3, the starting point is P2, the end point is P3, P2P3 is the secondary cutting edge cutting vector T3 is the Z-axis negative direction vector, so there is:

During the grinding process, the grinding wheel cuts along the edge line, as shown in Figure 8, which is a schematic diagram of the grinding of the flank surface of the secondary cutting edge segment in one embodiment. During the grinding process, the center point of the grinding tool moves from the initial position of the grinding tool Og1 to Og2. The center point of the grinding tool is regarded as the cutting contact point and the radius length of the grinding wheel is extended along the edge line direction. The initial position of the grinding tool on the flank surface of the secondary cutting edge segment can be obtained. LocationOg1:

Og=Og1+T3*K,

That is, the cutting edge line length parameter K is moved from the initial position Og1 of the grinding tool along the direction indicated by the tangent vector T of the cutting edge line.

The grinding tool center point trajectory Og on the rake face of the secondary cutting edge segment:

Og=Og1+T3*K,

is the length of P2P3, P2 is the end point of the secondary cutting edge line, and the initial position of the grinding tool Og. In this embodiment, the cutting edge line length parameter is moved from the initial position of the grinding tool along the direction indicated by the tangent vector of the cutting edge line, and the tool to be ground is ground, thereby ensuring the grinding accuracy and flat drill performance.

In one embodiment, when the flank surface is the main cutting edge segment flank surface, the value range of the edge line length parameter is from 0 to a preset distance, and the preset distance is greater than the edge line length of the main cutting edge of the flank surface.

Specifically, the preset distance is the edge line length of the main cutting edge on the flank surface plus a preset value.

Og=Og1+T3*K,

In this embodiment, the preset distance is set to be greater than the edge line length of the main cutting edge of the flank surface. That is, by extending the grinding length, it is possible to prevent incomplete grinding caused by edge wear of the grinding tool and improve the accuracy of grinding.

In one embodiment, the rake face grinding attitude includes the rake face grinding attitude of the main cutting edge segment;

Grind the tool to be ground in the direction indicated by the cutting edge line, including:

Obtain the grinding tool parameter value, the endpoint of the main cutting edge line and the tangent vector of the main cutting edge line;

Rotate the tangential vector of the main cutting edge line by a preset angle around the grinding posture of the rake face of the main cutting edge segment to obtain the connection vector from the center point of the grinding tool to the cutting point;

Based on the grinding tool parameter value, the end point of the main cutting edge line and the connecting vector, determine the initial position of the grinding tool when the grinding tool is located at the end point of the main cutting edge line;

From the initial position of the grinding tool along the direction indicated by the tangential vector of the main cutting edge line, move the length parameter of the main cutting edge line to grind the rake face of the main cutting edge segment of the tool to be ground.

Among them, the CNC machine obtains the grinding tool parameter value R _g , the end point P1 of the main cutting edge line, and the tangent vector T of the main cutting edge line.

Rotate the tangent vector T of the main cutting edge line around the main cutting edge segment rake face grinding attitude F _g2 by the preset rotation angle δ to obtain the connection vector T2 from the center point of the grinding tool to the cutting point:

T2＝rot(F _g2 ,δ)×T

The initial position of the grinding tool when it is located at the end point of the main cutting edge line:

Og1＝P1-T2*R _g

As shown in FIG. 9 , it is a schematic diagram of the center point of the grinding tool rotating through a preset angle in one embodiment. This includes the preset rotation angle δ on the XZ plane. From the initial position of the grinding tool along the direction indicated by the tangent vector of the main cutting edge line, move the main cutting edge line length parameter K to obtain the grinding tool center point trajectory Og of the rake face of the main cutting edge segment:

Og=Og1+T*K,

In this embodiment, the tangential vector of the main cutting edge line is rotated by a preset angle around the main cutting edge rake surface grinding posture to obtain the connecting vector from the center point of the grinding tool to the cutting point, thereby determining the end point of the main cutting edge line. The initial position of the grinding tool at the time, and moving the main cutting edge line length parameter along the direction indicated by the edge line can reduce the interference with the rake surface of the secondary cutting edge segment and improve the grinding accuracy.

In one embodiment, the target flank surface includes a major cutting edge segment flank surface and a minor cutting edge segment flank surface; the target rake surface includes a major cutting edge segment rake surface and a minor cutting edge segment rake surface.

Specifically, the grinding tool is controlled to grind the tool to be ground along the direction indicated by the main cutting edge line based on the flank grinding attitude perpendicular to the flank surface of the main cutting edge segment;

The grinding tool is controlled to grind the tool to be ground along the direction indicated by the secondary cutting edge line based on the flank grinding attitude perpendicular to the flank surface of the minor cutting edge segment;

The grinding tool is controlled to grind the tool to be ground along the direction indicated by the main cutting edge line based on the rake surface grinding attitude perpendicular to the rake surface of the main cutting edge segment;

The controlled grinding tool is based on the rake surface grinding attitude perpendicular to the rake surface of the minor cutting edge segment, and grinds the tool to be ground along the direction indicated by the minor cutting edge line to obtain the target flat drill. And the grinding order of the above four blade surfaces is not limited.

In this embodiment, the main cutting edge segment flank surface, the minor cutting edge segment flank surface, the major cutting edge segment rake surface and the minor cutting edge segment rake surface are obtained by grinding. The process is simple and the flat drill obtained by grinding is accurate. High sex.

In one embodiment, the trajectory generation program is written based on the above embodiments. By inputting the design parameter values of the flat drill (Table 1), the grinding wheel posture is obtained, and then the corresponding G code is obtained through post-processing. In the grinding simulation Verification is carried out in the software. The processed flat drill is shown in Figure 10, which can verify the accuracy and effectiveness of the algorithm. Figure 10 is a simulation image of a target flat drill in one embodiment. The left picture in Figure 10 is a perspective view of the target flat drill, and the right picture is a view of the XY plane.

Table 1

In one embodiment, a flat drill grinding method includes:

Step (a1): Rotate the first initial axis vector around the first axis of the grinding tool's own coordinate system by rotating the main cutting edge clearance angle and rotating the angle related to the flat drill tip angle around the second axis to obtain the back angle of the main cutting edge segment. The flank grinding posture is perpendicular to the blade surface.

In step (a2), the second initial axis vector is rotated by the rake angle of the main cutting edge around the tangential vector of the main cutting edge line to obtain a rake surface grinding attitude perpendicular to the rake surface of the main cutting edge segment.

In step (a3), the third initial axis vector is rotated around the third axis by the clearance angle of the secondary cutting edge to obtain a flank grinding attitude perpendicular to the flank surface of the secondary cutting section.

In step (a4), the fourth initial axis vector is rotated around the third axis by the rake angle of the minor cutting edge to obtain a rake face grinding attitude perpendicular to the rake face of the minor cutting section.

Step (a5), control the grinding tool to move the cutting edge line length parameter from the initial position of the grinding tool in the direction indicated by the tangential vector of the main cutting edge line based on the flank grinding attitude perpendicular to the flank surface of the main cutting edge segment, For grinding the tool to be ground; the value range of the edge line length parameter is from 0 to the preset distance, and the preset distance is greater than the edge line length of the main cutting edge of the flank surface.

Step (a6), control the grinding tool to move the cutting edge line length parameter from the initial position of the grinding tool along the direction indicated by the tangent vector of the minor cutting edge line based on the flank grinding attitude perpendicular to the flank surface of the minor cutting edge segment, Grind the tool to be ground.

In step (a7), the grinding tool is controlled based on the rake surface grinding posture perpendicular to the rake surface of the main cutting edge segment, along the tangent vector of the main cutting edge line from the initial position of the grinding tool when it is located at the end point of the main cutting edge line. In the indicated direction, move the main cutting edge line length parameter to grind the tool to be ground.

In step (a8), the grinding tool is controlled based on the rake surface grinding attitude perpendicular to the rake surface of the minor cutting edge segment, along the tangent vector of the minor cutting edge line from the initial position of the grinding tool when it is located at the end point of the minor cutting edge line. In the indicated direction, move the secondary cutting edge line length parameter to grind the tool to be ground to obtain the target flat drill.

In this embodiment, the grinding tool is controlled to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface, and the grinding tool is controlled to be perpendicular to the target rake surface. The grinding posture of the rake face is to grind the tool to be ground in the direction indicated by the cutting edge line. The grinding of the front and rear blade surfaces is based on the cutting edge line, which ensures the performance of the flat drill cutting edge and makes it simpler The grinding operation produces a flat drill with high accuracy and does not affect the performance of the tool.

It should be understood that although the various steps in the above-mentioned flowchart of Figure 4 are shown in sequence as indicated by arrows, and the various steps in step (a1) to step (a8) are shown in sequence as indicated by numbers, these steps do not necessarily follow the instructions of arrows or The order indicated by the numbers is executed sequentially. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figure 4 may include multiple steps or stages. These steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution order of these steps or stages is also It does not necessarily need to be performed sequentially, but may be performed in turn or alternately with other steps or at least part of steps or stages in other steps.

In one embodiment, as shown in Figure 11, it is a structural block diagram of a flat drill grinding device in one embodiment. Figure 11 provides a flat drill grinding device. The device can use software modules or hardware modules, or a combination of the two to become part of the CNC machine. The device specifically includes: flank surface grinding module 1102, rake surface grinding module Cut module 1104, which:

The flank grinding module 1102 is used to control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface;

The rake surface grinding module 1104 is used to control the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the rake surface grinding attitude perpendicular to the target rake surface. , to obtain the target flat drill.

By controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the flank grinding attitude perpendicular to the target flank surface, the control grinding tool is based on the rake surface grinding posture perpendicular to the target rake surface. In the cutting posture, the tool to be ground is ground along the direction indicated by the cutting edge line. The front and rear blade surfaces are ground with the cutting edge line as a reference, which ensures the performance of the flat drill cutting edge and obtains the best results through relatively simple grinding operations. Flat drill, high accuracy, and does not affect the performance of the tool.

In one embodiment, the flank grinding module 1102 is also used to: obtain the relief angle of the target flank surface; rotate the initial flank grinding posture around the corresponding axis to obtain the relief angle perpendicular to the target flank surface. Flank surface grinding posture; the rake surface grinding module 1104 is also used to: obtain the rake angle of the target rake surface; rotate the initial rake surface grinding posture around the corresponding axis to obtain the rake angle perpendicular to the target rake surface The rake face grinding posture.

In this embodiment, by rotating the initial flank grinding posture around the corresponding axis by the relief angle, a flank grinding posture perpendicular to the target flank surface is obtained, and the initial rake surface grinding posture is rotated around the corresponding axis. Rotate the rake angle to obtain a rake surface grinding posture perpendicular to the target rake surface, which can ensure the accuracy of the grinding posture and flat drill performance.

In one embodiment, the flank grinding module 1102 is also configured to: rotate the first initial axis vector around the first axis of the grinding tool's own coordinate system by rotating the main cutting edge relief angle and rotating the flat drill tip angle around the second axis. The relevant angle is used to obtain the flank grinding attitude perpendicular to the flank surface of the main cutting edge segment.

In this embodiment, the first initial axis vector is rotated around the first axis of the grinding tool's own coordinate system by the main cutting edge relief angle and the angle related to the flat drill tip angle is rotated around the second axis to obtain the relative angle to the main cutting edge segment relief surface. The vertical flank grinding attitude ensures grinding accuracy and flat drill performance.

In one embodiment, the flank grinding module 1102 is used to: obtain the grinding tool parameter value, the end point of the cutting edge line, and the tangent vector of the cutting edge line; based on the grinding tool parameter value, the end point of the cutting edge line, and the cutting edge line The tangent vector determines the initial position of the grinding tool when the grinding tool is located at the end point of the cutting edge line; move the cutting edge line length parameter from the initial position of the grinding tool in the direction indicated by the tangent vector of the cutting edge line to grind the tool to be ground.

In one embodiment, the rake face grinding module 1104 is used to: obtain the grinding tool parameter value, the end point of the cutting edge line, and the tangent vector of the cutting edge line; based on the grinding tool parameter value, the end point of the cutting edge line, and the cutting edge line The tangent vector determines the initial position of the grinding tool when the grinding tool is located at the end point of the cutting edge line; move the cutting edge line length parameter from the initial position of the grinding tool in the direction indicated by the tangent vector of the cutting edge line to grind the tool to be ground.

In this embodiment, the cutting edge line length parameter is moved from the initial position of the grinding tool along the direction indicated by the tangent vector of the cutting edge line to grind the tool to be ground, which can ensure grinding accuracy and flat drill performance.

In one embodiment, when the flank surface is the main cutting edge segment flank surface, the value range of the edge line length parameter is from 0 to a preset distance, and the preset distance is greater than the edge line length of the main cutting edge of the flank surface.

In this embodiment, the preset distance is set to be greater than the edge line length of the main cutting edge of the flank surface. That is, by extending the grinding length, it is possible to prevent incomplete grinding caused by edge wear of the grinding tool and improve the accuracy of grinding.

In one embodiment, the rake face grinding attitude includes the rake face grinding attitude of the main cutting edge segment; the rake face grinding module 1104 is used to: obtain the grinding tool parameter value, the end point of the main cutting edge line and the main cutting edge tangent vector of the line;

Rotate the tangential vector of the main cutting edge line by a preset angle around the grinding posture of the rake face of the main cutting edge segment to obtain the connection vector from the center point of the grinding tool to the cutting point;

Based on the grinding tool parameter value, the end point of the main cutting edge line and the connecting vector, determine the initial position of the grinding tool when the grinding tool is located at the end point of the main cutting edge line;

From the initial position of the grinding tool along the direction indicated by the tangential vector of the main cutting edge line, move the length parameter of the main cutting edge line to grind the rake face of the main cutting edge segment of the tool to be ground.

In this embodiment, the tangential vector of the main cutting edge line is rotated by a preset angle around the main cutting edge rake surface grinding posture to obtain the connecting vector from the center point of the grinding tool to the cutting point, thereby determining the end point of the main cutting edge line. The initial position of the grinding tool at the time, and moving the main cutting edge line length parameter along the direction indicated by the edge line can reduce the interference with the rake surface of the secondary cutting edge segment and improve the grinding accuracy.

In one embodiment, the target flank surface includes a major cutting edge segment flank surface and a minor cutting edge segment flank surface; the target rake surface includes a major cutting edge segment rake surface and a minor cutting edge segment rake surface.

In this embodiment, the main cutting edge segment flank surface, the minor cutting edge segment flank surface, the major cutting edge segment rake surface and the minor cutting edge segment rake surface are obtained by grinding. The process is simple and the flat drill obtained by grinding is accurate. High sex.

For specific limitations on the flat drill grinding device, please refer to the above limitations on the flat drill grinding method, which will not be described again here. Each module in the above-mentioned flat drill grinding device can be realized in whole or in part by software, hardware and combinations thereof. Each of the above modules can be embedded in or independent of the processor of the CNC machine in the form of hardware, or can be stored in the memory of the CNC machine in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

In one embodiment, a CNC machine is provided, the internal structure diagram of which can be shown in Figure 12. The CNC machine includes a processor, memory, communication interface, display screen and input device connected through a system bus. Among them, the processor of the CNC machine is used to provide calculation and control capabilities. The memory of the CNC machine includes non-volatile storage media and internal memory. The non-volatile storage medium stores operating systems and computer programs. This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media. The communication interface of the CNC machine is used for wired or wireless communication with external terminals. The wireless mode can be implemented through WIFI, operator network, NFC (Near Field Communication) or other technologies. The computer program, when executed by a processor, implements a flat drill grinding method. The display screen of the CNC machine can be a liquid crystal display or an electronic ink display. The input device of the CNC machine can be a touch layer covered on the display screen, or it can be a button, trackball or touch pad provided on the CNC machine shell. , it can also be an external keyboard, trackpad or mouse, etc.

Those skilled in the art can understand that the structure shown in Figure 12 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the CNC machine to which the solution of the present application is applied. The specific CNC machine can May include more or fewer parts than shown, or combine certain parts, or have a different arrangement of parts.

In one embodiment, a CNC machine is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the steps of the above method embodiments.

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 of the above method embodiments are implemented.

In one embodiment, a computer program product or computer program is provided that includes computer instructions stored in a computer-readable storage medium. The processor of the CNC machine reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the CNC machine executes the steps in the above method embodiments.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program may include processes as in the above method embodiments. Any reference to memory, storage, database or other media used in the embodiments provided in this application may 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 or optical memory, etc. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM).

The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present application, or directly or indirectly used in other related The technical fields are all equally included in the scope of patent protection of this application.

Claims (10)

1. A method of grinding a spade drill, the method comprising:

controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the grinding gesture of the rear tool face perpendicular to the target rear tool face;

and controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the grinding gesture of the front tool surface perpendicular to the target front tool surface so as to obtain the target spade drill.

2. The method according to claim 1, wherein the method further comprises:

acquiring a relief angle of the target rear cutter face;

rotating the initial clearance face grinding gesture around the corresponding shaft by the clearance angle to obtain a clearance face grinding gesture perpendicular to the target clearance face;

acquiring a rake angle of the target rake face;

and rotating the initial rake face grinding posture around the corresponding axis by the rake angle to obtain the rake face grinding posture vertical to the target rake face.

3. The method of claim 2, wherein said rotating the initial relief grinding pose by the relief angle about the corresponding axis to obtain a relief grinding pose perpendicular to the target relief comprises:

and rotating the first initial axis vector around a first axis of a coordinate system of the grinding tool to obtain a rear tool face grinding posture perpendicular to the rear tool face of the main cutting tool section by rotating the rear angle of the main cutting tool around the first axis and rotating the angle related to the sharp angle of the flat drill around the second axis.

4. The method of claim 1, wherein grinding the tool to be sharpened along the direction indicated by the cutting edge line comprises:

acquiring a grinding tool parameter value, an endpoint of a cutting edge line and a cutting vector of the cutting edge line;

determining an initial position of the grinder when the grinder is positioned at the end point of the cutting edge line based on the grinder parameter value, the end point of the cutting edge line and the tangent vector of the cutting edge line;

and moving the length parameter of the cutting edge line from the initial position of the grinding tool along the direction indicated by the cutting vector of the cutting edge line, and grinding the to-be-ground grinding tool.

5. The method of claim 4, wherein when the target relief surface is a major cutting edge segment relief surface, the value of the edge line length parameter ranges from 0 to a preset distance, and the preset distance is greater than the edge line length of the major cutting edge of the relief surface.

6. The method of claim 1, wherein the rake face grinding pose comprises a main cutting edge segment rake face grinding pose;

the grinding of the tool to be sharpened along the direction indicated by the cutting edge line comprises the following steps:

acquiring grinding tool parameter values, endpoints of a main cutting edge line and cutting vectors of the main cutting edge line;

rotating the tangent vector of the main cutting edge line around the grinding gesture of the front cutter surface of the main cutting edge section by a preset corner to obtain a connecting line vector from the center point of the grinding tool to the cutting point;

determining a grinding tool initial position when the grinding tool is positioned at the endpoint of the main cutting edge line based on the grinding tool parameter value, the endpoint of the main cutting edge line and the connecting line vector;

and moving the length parameter of the main cutting edge line from the initial position of the grinding tool along the direction indicated by the cutting vector of the main cutting edge line, and grinding the front tool surface of the main cutting edge section of the tool to be ground.

7. The method of any one of claims 1 to 6, wherein the target relief surface comprises a main cutting edge segment relief surface and a minor cutting edge segment relief surface; the target rake surface includes a main cutting edge segment rake surface and a minor cutting edge segment rake surface.

8. A spade drill grinding apparatus, said apparatus comprising:

the tool post grinding module is used for controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the tool post grinding gesture perpendicular to the target tool post;

and the rake face grinding module is used for controlling the grinding tool to grind the tool to be ground along the direction indicated by the cutting edge line based on the rake face grinding gesture perpendicular to the target rake face so as to obtain the target spade drill.

9. A numerical control machine comprising a memory and a processor, said memory storing a computer program, characterized in that the processor implements the steps of the method according to any one of claims 1 to 7 when executing said computer program.

10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.