Grinding wheel for machining wave-edge milling cutter and grinding method

Abstract

The invention relates to the technical field of grinding machining, and provides a grinding wheel for wave-edge milling cutter machining and a grinding method.The grinding wheel comprises a grinding wheel body, the grinding wheel body is provided with a grinding part, and the section of the grinding part comprises a linear section, a first arc-shaped section, a second arc-shaped section, a third arc-shaped section and a fourth arc-shaped section; the first arc-shaped section and the third arc-shaped section are arc-shaped recesses relative to the grinding wheel main body; the second arc-shaped section and the fourth arc-shaped section are arc-shaped bulges relative to the grinding wheel main body; one end of the first arc-shaped section is connected with one end of the second arc-shaped section; one end of the third arc-shaped section is connected with one end of the fourth arc-shaped section; the other end of the second arc-shaped section and the other end of the third arc-shaped section are in linear or curve transition; the linear section is located on the side, away from the second arc-shaped section, of the first arc-shaped section and connected with the other end of the first arc-shaped section. The problems that in the actual machining process of a common grinding wheel used for machining, the grinding allowance is large during shoveling-in, the machining efficiency is low, meanwhile, the abrasion speed of the grinding wheel is high, and the shape maintaining performance is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding processing, and in particular to a grinding wheel for processing a wave-edge milling cutter and a grinding method. Background Art

[0002] Sine wave edge milling cutter is a type of end milling cutter, which is an innovation in the geometric design of milling cutter. Its cutting edge is not an ordinary spiral line, but a spiral sine curve. The regular periodic changes of the helix angle and the rake angle of the circumferential tooth of the milling cutter improve the cutting force, making it more uniform and stable. At the same time, due to the design of the sine curve edge, the chips are shorter, the chip removal is smoother, the thermal deformation of the workpiece is smaller, and higher cutting parameters can be used. The processing efficiency is 1~2 times or even higher than that of ordinary spiral edge milling cutters. It is precisely because of the unique sine curve edge design of the wave edge end mill that the processing and manufacturing of the tool is more complicated.

[0003] Diamond profiled grinding wheels are required for processing the wavy circumferential tooth edge of wave-edge milling cutters. The cross-sectional shape of the grinding wheel used in general processing is produced into a wave crest and a wave trough corresponding to the shape of the milling cutter waveform. In the actual processing process, there are problems such as large grinding allowance during scraping in, low processing efficiency, fast grinding wheel wear and poor shape retention. Summary of the invention

[0004] The invention provides a grinding wheel for processing a wave-edge milling cutter and a grinding method, which solves the problems that the grinding wheel used in general processing has large grinding allowance during cutting in, low processing efficiency, fast grinding wheel wear speed and poor shape retention during actual processing.

[0005] The technical solution of the present invention is as follows: A grinding wheel for processing a wave-edge milling cutter, comprising: A grinding wheel body, wherein the grinding wheel body has a grinding portion, and a cross section of the grinding portion includes a straight line segment, a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment; The first arc segment and the third arc segment are arc-shaped depressions relative to the grinding wheel body; The second arc segment and the fourth arc segment are arc-shaped protrusions relative to the grinding wheel body; One end of the first arc segment is connected to one end of the second arc segment; One end of the third arc segment is connected to one end of the fourth arc segment; The other end of the second arc segment and the other end of the third arc segment are transitioned in a straight line or a curve; The straight line segment is located on a side of the first arc segment away from the second arc segment, and the straight line segment is connected to the other end of the first arc segment.

[0006] Optionally, a horizontal reference line is made along the axis of the grinding wheel body; The straight line segment is arranged obliquely, and gradually approaches the horizontal reference line from one end connected to the first arc segment to the other end, and the angle between the straight line segment and the horizontal reference line is 5°~8°.

[0007] Optionally, the vertical line where the connection point of the straight segment and the first arc segment is located is A, the vertical line where the other end point of the straight segment is located is B, the vertical center line of the second arc segment is C, and the vertical center line of the third arc segment is D; The distance from A to C is smaller than the distance from C to D, and the distance from B to C is larger than the distance from C to D.

[0008] Optionally, the vertical line where the center point of the fourth arc segment lies is E, where the distance from C to D is equal to the distance from D to E.

[0009] Optionally, the radius of the second arc segment is smaller than the radius of the fourth arc segment, and the distance from the arc top of the second arc segment to the horizontal reference line is smaller than the distance from the arc top of the fourth arc segment to the horizontal reference line.

[0010] Optionally, the radius of the second arc segment is R2, and the radius of the fourth arc segment is R4, wherein 0.7*R4≤R2≤0.9*R4.

[0011] Optionally, the radius of the first arc segment is smaller than the radius of the third arc segment, the distance from the bottom end of the arc of the first arc segment to the horizontal reference line is smaller than the distance from the bottom end of the arc of the third arc segment to the horizontal reference line, and the distance from each point of the straight line segment to the horizontal reference line is smaller than the distance from the bottom end of the arc of the third arc segment to the horizontal reference line.

[0012] Optionally, the radius of the first arc segment is R1, and the radius of the third arc segment is R3, wherein 0.7*R3≤R1≤0.9*R3.

[0013] Optionally, the cross section of the grinding wheel body further comprises a first inclined section and a second inclined section; One end of the first inclined section is connected to the other end of the straight section and extends radially toward the middle of the grinding wheel body; One end of the second inclined section is connected to the other end of the fourth arc section and radially extends toward the middle of the grinding wheel body.

[0014] A grinding method for processing a wave-edge milling cutter, using a grinding wheel for processing a wave-edge milling cutter to process a milling cutter edge, comprising: Step 1: The grinding wheel body is fed stepwise grinding from one side of the end face of the milling cutter blade according to one pitch along the axial direction of the milling cutter blade, and the radial direction is fed according to the wave height of the milling cutter waveform, wherein one side of the straight line segment is the grinding reference surface; Step 2: using the straight line segment to pre-grind the arc back angle of the milling cutter blade, and roughly grinding the margin of the back surface of the milling cutter blade; Step 3: Use the first arc segment to grind the last concave arc of the waveform to form an arc transition connection with the milling cutter handle to remove the sharp point; Step 4: Use the second arc segment to perform rough grinding of the trough allowance of the milling cutter blade; Step 5: Use the third arc segment corresponding to the wave crest position of the sine curve of the milling cutter blade, and the fourth arc segment corresponding to the wave trough position of the sine curve of the milling cutter blade for final fine grinding.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, the grinding wheel serves as a basic bearing part to provide support for the grinding part, wherein the straight line segment is located on the side of the first arc segment away from the second arc segment and is connected to the other end of the first arc segment. When processing a wave-edge milling cutter, in the stage where the sine waveform (referring to the sine waveform composed of the third arc segment and the fourth arc segment, the sizes of the third arc segment and the fourth arc segment are made according to the tooth shape of the milling cutter blade) has not been cut in, the function of the straight line segment is to roughly grind the back face allowance of the milling cutter blade (the back face is the surface opposite to the milling cutter cutting edge. The back face allowance of the milling cutter blade refers to the excess material portion reserved for the back face before the milling cutter is ground), providing a basis for subsequent grinding, and pre-grinding the arc back angle (when observed from the side of the milling cutter, the angle between the back face and the cutting plane is not a simple plane angle, but the back face transitions in the form of an arc near the cutting edge, and the angle corresponding to this arc is the arc back angle), which plays a key role in the initial forming of the milling cutter.

[0016] The first arc segment is an arc-shaped depression, one end of which is connected to the second arc segment, and the other end is connected to the straight segment. The sharp point formed by the last concave arc of the relief grinding waveform and the tool handle forms an arc transition, which reduces the concentration of processing stress, reduces the risk of scratching the operator's hands when loading and unloading the tool, and improves the safety of operation.

[0017] The second arc segment is an arc-shaped protrusion, one end of which is connected to the first arc segment, and the other end is connected to the third arc segment through a straight line or curve transition. Its main function is to roughly grind the wave valley of the milling cutter blade. The third arc segment is an arc-shaped depression, one end of which is connected to the fourth arc segment, and the other end is transitionally connected to the second arc segment; the fourth arc segment is an arc-shaped protrusion. The radius dimensions of the third and fourth arc segments are customized according to the requirements of the milling cutter tooth shape. During processing, the concave arc and convex parts matching the tooth shape are ground to provide shape support for the wave edge of the wave edge milling cutter, ensuring that the cutting performance of the milling cutter meets the standard.

[0018] The straight line segment is roughly ground to remove the back surface allowance of the milling cutter blade when the sine waveform is not cut in. The step-by-step grinding reduces the workload of subsequent fine grinding. Compared with the large grinding allowance when the traditional grinding wheel is shoveled in, most of the allowance can be removed faster, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0020] Figure 1 It is a structural schematic diagram of the grinding wheel main body of the present invention; Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure of I in the figure; Figure 3 for Figure 2 Schematic diagram of the arrangement relationship of various structures; Figure 4 It is a schematic diagram of the grinding state of the present invention; Figure 5 The state of the milling cutter blade after a conventional grinding wheel grinding (magnified 158 times); Figure 6 This is the state of the milling cutter blade after the grinding wheel body of the present invention has been relieved once (magnified 158 times).

[0021] In the figure: 1, grinding wheel body; 101, horizontal reference line; 2, grinding part; 3, straight line segment; 4, first arc segment; 5, second arc segment; 6, third arc segment; 7, fourth arc segment; 8, first inclined segment; 9, second inclined segment; 10, single pitch; 11, grinding reference surface; 12, transition segment; 13, milling cutter blade; 14, arc transition. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0023] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0024] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] Reference Figure 1 to Figure 6 A grinding wheel for processing a wave-edge milling cutter is proposed, comprising: a grinding wheel body 1, the grinding wheel body 1 having a grinding portion 2, the cross-section of the grinding portion 2 comprising a straight segment 3, a first arc segment 4, a second arc segment 5, a third arc segment 6 and a fourth arc segment 7; the first arc segment 4 and the third arc segment 6 are arc-shaped depressions relative to the grinding wheel body 1; the second arc segment 5 and the fourth arc segment 7 are arc-shaped protrusions relative to the grinding wheel body 1; one end of the first arc segment 4 is connected to one end of the second arc segment 5; one end of the third arc segment 6 is connected to one end of the fourth arc segment 7; the other end of the second arc segment 5 and the other end of the third arc segment 6 are in a straight line or curve transition; the straight line segment 3 is located on the side of the first arc segment 4 away from the second arc segment 5, and the straight line segment 3 is connected to the other end of the first arc segment 4.

[0027] In this embodiment, the grinding wheel serves as the basic bearing part to provide support for the grinding part 2, wherein the straight segment 3 is located on the side of the first arc segment 4 away from the second arc segment 5 and is connected to the other end of the first arc segment 4. When processing the wave-edge milling cutter, in the stage where the sine waveform (referring to the sine waveform composed of the third arc segment 6 and the fourth arc segment 7, the dimensions of the third arc segment 6 and the fourth arc segment 7 are made according to the tooth shape of the milling cutter blade 13) has not been cut in, the function of the straight segment 3 is to roughly grind the back face allowance of the milling cutter blade 13 (the back face is the face opposite to the milling cutter cutting edge. The back face allowance of the milling cutter blade 13 refers to the excess material part reserved for the back face before the milling cutter is ground), providing a basis for subsequent grinding, and pre-grinding the arc back angle (when observed from the side of the milling cutter, the angle between the back face and the cutting plane is not a simple plane angle, but the back face transitions in the form of an arc near the cutting edge, and the angle corresponding to this arc is the arc back angle), which plays a key role in the initial forming of the milling cutter.

[0028] The first arc segment 4 is an arc-shaped depression, one end of which is connected to the second arc segment 5, and the other end is connected to the straight segment 3. The sharp point formed by the last concave arc exit of the relief grinding waveform and the tool handle forms an arc transition 14, which reduces the concentration of processing stress, reduces the risk of scratching the operator's hands when loading and unloading the tool, and improves the safety of operation.

[0029] The second arc segment 5 is an arc-shaped protrusion, and its main function is to roughly grind the trough of the milling cutter blade 13. One end is connected to the third arc segment 6 by a straight line or a curve transition, wherein the straight line or curve transition connection is called a transition segment 12. The third arc segment 6 is an arc-shaped depression, one end of which is connected to the fourth arc segment 7, and the other end is transitionally connected to the second arc segment 5; the fourth arc segment 7 is an arc-shaped protrusion. The radius dimensions of the third arc segment 6 and the fourth arc segment 7 are customized according to the requirements of the milling cutter tooth shape. During processing, the concave arc and the convex part matching the tooth shape are ground out to provide shape support for the wave edge of the wave edge milling cutter, and ensure that the cutting performance of the milling cutter meets the standard.

[0030] The straight line segment 3 is roughly ground to the back edge allowance of the milling cutter blade 13 before the sinusoidal waveform is cut in. The step-by-step grinding reduces the workload of subsequent fine grinding. Compared with the large grinding allowance when the traditional grinding wheel is cut in, most of the allowance can be removed faster, thereby improving the processing efficiency.

[0031] Furthermore, a horizontal reference line 101 is made along the axis of the grinding wheel body 1; the straight line segment 3 is arranged obliquely, and gradually approaches the horizontal reference line 101 from one end connected to the first arc segment 4 to the other end, and the angle between the straight line segment 3 and the horizontal reference line 101 is 5°~8°.

[0032] In this embodiment, the straight line segment 3 is inclined at an angle of 5° to 8° to the horizontal reference line 101. When the grinding wheel roughly grinds the back surface of the milling cutter blade 13, compared with the case where the straight line segment 3 is arranged in parallel with the horizontal reference line 101, the inclined setting makes the grinding force produce a certain component force on the back surface of the milling cutter blade 13, which helps to remove the excess more evenly, avoids excessive grinding or uneven grinding due to the concentration of grinding force in a certain local area, and improves the grinding quality.

[0033] From one end where the straight line segment 3 is connected to the first arc segment 4 to the other end, it gradually approaches the horizontal reference line 101 to achieve a progressive grinding process. It is adapted to the distribution of the allowance on the back face of the milling cutter blade 13. The uniformity and rationality of the grinding of the entire back face are guaranteed. This design is also conducive to working in coordination with other structures of the grinding wheel. For example, the straight line segment 3 gradually approaches the horizontal reference line 101, and the connection with the first arc segment 4 is more natural and smooth. After completing the rough grinding of the back face allowance by the straight line segment 3, it can smoothly transition to the arc transition grinding of the connection between the milling cutter blade 13 and the tool shank by the first arc segment 4, which ensures the continuity and accuracy of the entire milling cutter grinding process.

[0034] Furthermore, the vertical line where the connection point of the straight segment 3 and the first arc segment 4 is located is A, the vertical line where the other end point of the straight segment 3 is located is B, the vertical center line of the second arc segment 5 is C, and the vertical center line of the third arc segment 6 is D; The distance from A to C is smaller than the distance from C to D, and the distance from B to C is larger than the distance from C to D.

[0035] In this embodiment, this distance relationship enables the straight segment 3 to accurately align with the next wave crest position of the milling cutter blade 13 during the rotation of the grinding wheel. Since the distance from A to C is smaller than the distance from C to D, the connecting end of the straight segment 3 and the first arc segment 4 is close to the center line of the second arc segment 5, which provides a relatively accurate initial position for the straight segment 3 when it starts to contact the milling cutter, so that it can extend toward the next wave crest position. At the same time, the distance from B to C is greater than the distance from C to D, which ensures that the straight segment 3 can cover the next wave crest position in the length direction, providing sufficient grinding stroke for rough grinding.

[0036] The straight line segment 3 gradually approaches the horizontal reference line 101 from one end close to the first arc segment 4 to the other end, so that when rough grinding the next peak position, it can perform corresponding degrees of grinding at different positions of the peak according to the excess distribution, ensuring that the appropriate amount of excess can be evenly removed over the entire peak length, laying a good foundation for the subsequent fine grinding process.

[0037] This arrangement ensures the coordination between the straight segment 3 and other arc segments during the grinding process. After the straight segment 3 roughly grinds the next wave crest position, it can smoothly transition to cooperate with the first arc segment 4 to grind the connection between the milling cutter blade 13 and the tool handle. At the same time, the third arc segment 6 and the fourth arc segment 7 respectively finely grind the wave crest and the wave trough, and jointly complete the processing of the milling cutter blade 13, thereby improving the efficiency and accuracy of the entire milling cutter blade 13 processing process.

[0038] Furthermore, the vertical line where the center point of the fourth arc segment 7 lies is E, wherein the distance from C to D is equal to the distance from D to E.

[0039] In this embodiment, the equal distance setting provides an accurate position basis for the coordinated work of the various parts of the grinding wheel grinding section 2. The fourth arc segment 7 can completely cover the second arc segment 5, and the area roughly ground by the second arc segment 5 can be fully and accurately processed for secondary processing. In actual processing, if the local area of ​​the trough is unevenly ground due to reasons such as grinding wheel wear during the rough grinding of the second arc segment 5, the covering fine grinding of the fourth arc segment 7 can correct these areas, thereby ensuring that the shape accuracy and surface quality of the entire trough meet the design requirements.

[0040] Furthermore, the radius of the second arc segment 5 is smaller than the radius of the fourth arc segment 7 , and the distance from the arc top of the second arc segment 5 to the horizontal reference line 101 is smaller than the distance from the arc top of the fourth arc segment 7 to the horizontal reference line 101 .

[0041] In this embodiment, after the second arc segment 5 is roughly ground, the trough has been initially formed, but still needs high-precision trimming. When the fourth arc segment 7 with a larger radius is finely ground, the trough can be fully trimmed from a more favorable angle to ensure the shape accuracy and surface quality of the trough. It can perform the final fine processing on the trough without affecting the roughly ground area, so that the overall shape of the trough is more in line with the design requirements, thereby improving the cutting performance and durability of the milling cutter.

[0042] Furthermore, the radius of the second arc segment 5 is R2, and the radius of the fourth arc segment 7 is R4, wherein 0.7*R4≤R2≤0.9*R4.

[0043] In this embodiment, during the grinding process, the contact area between the grinding wheel and the milling cutter can be approximately regarded as a certain shape (related to the contour of the arc segment), and its area is closely related to the grinding amount. For the arc segment, the area is related to the square of the radius. Assuming that other conditions remain unchanged, the grinding amount of the second arc segment 5 and the fourth arc segment 7 is proportional to the square of their respective radii. Therefore, the grinding amount of rough grinding can be controlled between 49% and 81%, and the rough grinding amount can be accurately controlled to make the processing flow more scientific and reasonable. Removing part of the excess in the rough grinding stage can reduce the burden for subsequent fine grinding and avoid problems such as too long processing time and too fast wear of the grinding wheel due to excessive excess during fine grinding. At the same time, a reasonable rough grinding allowance also provides a suitable basis for fine grinding, which is convenient for precise trimming of the shape and size of the trough during fine grinding.

[0044] Furthermore, the radius of the first arc segment 4 is smaller than the radius of the third arc segment 6, the distance from the arc bottom of the first arc segment 4 to the horizontal reference line 101 is smaller than the distance from the arc bottom of the third arc segment 6 to the horizontal reference line 101, and the distance from each point of the straight line segment 3 to the horizontal reference line 101 is smaller than the distance from the arc bottom of the third arc segment 6 to the horizontal reference line 101.

[0045] In this embodiment, the third arc segment 6 has a larger radius and a higher arc bottom position, which provides conditions for it to cover the grinding parts of the straight segment 3 and the first arc segment 4. The larger radius enables the third arc segment 6 to have a wider coverage and a smoother grinding effect during grinding, and can further trim the area that has been initially ground by the straight segment 3 and the first arc segment 4. The higher distance from the arc bottom to the horizontal reference line 101 ensures that the third arc segment 6 can cut in from a suitable position during the rotation of the grinding wheel, and fully cover the parts that have been ground by the straight segment 3 and the first arc segment 4.

[0046] The distances from each point of the straight segment 3 to the horizontal reference line 101 are all less than the distance from the arc bottom end of the third arc segment 6 to the horizontal reference line 101. This positional relationship ensures that when the straight segment 3 is rough-grinding the milling cutter blade 13 (such as pre-grinding the arc back angle and rough-grinding the back edge allowance of the milling cutter blade 13), its processing area is completely within the coverage range of the third arc segment 6. After the rough grinding of the straight segment 3 is completed, the third arc segment 6 can immediately perform subsequent processing on the area to achieve the continuity and integrity of the grinding process.

[0047] The third arc segment 6 covers the grinding parts of the straight segment 3 and the first arc segment 4, so that the milling cutter blade 13 can be uniformly trimmed after being ground at different stages. For example, the rough grinding of the straight segment 3 may leave some unevenness or dimensional deviation, and the first arc segment 4 may also have slight errors when removing sharp points. The covering grinding of the third arc segment 6 can correct these problems, thereby improving the overall accuracy of the milling cutter blade 13 and ensuring the cutting performance of the milling cutter.

[0048] This covering grinding method can ensure the quality consistency of the same part of the milling cutter blade 13 at different grinding stages. Different grinding areas can be uniformly processed by the third arc segment 6, avoiding the quality difference caused by improper grinding connection of each segment, making the performance of the cutting edge of the milling cutter more stable during the entire use process, and improving the durability and processing reliability of the milling cutter.

[0049] Furthermore, the radius of the first arc segment 4 is R1, and the radius of the third arc segment 6 is R3, wherein 0.7*R3≤R1≤0.9*R3.

[0050] In this embodiment, the first arc segment is mainly responsible for forming an arc transition connection with the tool handle at the last concave arc exit of the relief grinding waveform to remove the sharp point, which requires a relatively small and flexible radius to accurately process this specific area. The third arc segment 6 is used to cover the grinding area of ​​the milling cutter blade 13 of the straight segment 3 and the first arc segment 4 for subsequent finishing. The larger radius helps to achieve more extensive and smooth grinding.

[0051] Furthermore, the grinding wheel body 1 has a first inclined section 8 and a second inclined section 9; one section of the first inclined section 8 is connected to the other end of the straight section 3 and extends radially toward the middle of the grinding wheel body 1; one end of the second inclined section 9 is connected to the other end of the fourth arc section 7 and extends radially toward the middle of the grinding wheel body 1.

[0052] In this embodiment, the inclined design of the first inclined section 8 helps to change the direction and distribution of the grinding force. During the grinding wheel rotation grinding process, the grinding force is originally mainly concentrated on the grinding part 2 that is in direct contact with the milling cutter. The presence of the first inclined section 8 enables part of the grinding force to be transmitted to the middle part of the grinding wheel body 1 along the inclined direction, thereby dispersing the grinding force and reducing the pressure on the local grinding part 2. This can not only reduce the wear rate of the grinding wheel during the grinding process and extend the service life of the grinding wheel, but also make the grinding force on the milling cutter during the processing more uniform, which helps to improve the processing accuracy of the milling cutter.

[0053] The setting of the inclined section provides a guide channel for the chips generated during the grinding process. As the grinding wheel body 1 rotates, the chips are more likely to move toward the middle of the grinding wheel body 1 along the first inclined section 8, thereby avoiding the accumulation of chips in the grinding area. The accumulated chips may affect the grinding effect, causing scratches or increased roughness on the machined surface, while the first inclined section 8 improves the chip removal conditions, which is conducive to improving the machining quality of the milling cutter.

[0054] Similar to the first inclined section 8, the second inclined section 9 also helps to disperse the grinding force. When the fourth arc section 7 finely grinds the wave valley of the milling cutter blade 13, the second inclined section 9 guides part of the grinding force to the middle of the grinding wheel body 1, so that the fourth arc section 7 can work more stably during the fine grinding process, reduce the error caused by uneven grinding force, and further improve the fine grinding accuracy of the wave valley of the milling cutter.

[0055] During the fine grinding process, although relatively few chips are generated, higher machining accuracy is required. The second inclined section 9 further optimizes the chip removal path, ensuring that even tiny chips can be guided away from the grinding area in time, avoiding the impact of chips on the fine grinding surface quality, and ensuring the surface smoothness and dimensional accuracy of the milling cutter wave valley after fine grinding.

[0056] The first inclined section 8 and the second inclined section 9 are connected to the straight section 3 and the fourth arc section 7 respectively, and together improve the processing flow of the grinding wheel on the milling cutter. From the rough grinding of the straight section 3 to the optimization of the grinding force and chip removal by the first inclined section 8, to the fine grinding of the fourth arc section 7 and the further guarantee of the fine grinding effect and chip removal by the second inclined section 9, each part cooperates closely to improve the efficiency and quality of the entire processing process.

[0057] The setting of these two inclined sections not only optimizes the mechanical properties of the grinding wheel during the grinding process, making the grinding force distribution more reasonable, but also improves the chip removal conditions, thereby enhancing the overall performance of the grinding wheel. This design helps to improve the stability and reliability of the grinding wheel in the processing of wave-edge milling cutters, meeting the demand for high-precision processing of milling cutters.

[0058] A grinding method for processing a wave-edge milling cutter, using a grinding wheel for processing a wave-edge milling cutter to process a milling cutter blade 13, comprising: Step 1: The grinding wheel body 1 is fed and ground along the axis direction of the milling cutter blade 13 at one side of the end face of the milling cutter blade 13 according to one pitch 10, and the cutting is fed radially according to the wave height of the milling cutter waveform (wave-like shape) (feeding according to the wave height means that the highest point to the lowest point of the wave line is the tooth depth of the tool, and the grinding wheel is fed radially according to this value), wherein one side of the straight line segment 3 is the grinding reference surface 11; Step 2: Use the straight line segment 3 to pre-grind the arc back angle of the milling cutter blade 13 and roughly grind the allowance of the back surface of the milling cutter blade 13; Step 3: Use the first arc segment 4 to grind the last concave arc of the waveform to form an arc transition connection with the milling cutter handle to remove the sharp point; Step 4: Use the second arc segment 5 to perform rough grinding of the wave valley allowance of the milling cutter edge 13; Step 5: Use the third arc segment 6 to correspond to the peak position of the sine curve of the milling cutter blade 13 and the fourth arc segment 7 to correspond to the trough position of the sine curve of the milling cutter blade 13 for final fine grinding.

[0059] The method provided by this solution can achieve rough and fine machining of the wave-edge milling cutter blade in one process. The comparative experiments have verified that its advantages include but are not limited to: 1. Greatly improve processing efficiency; 2. By allocating the machining allowance, the grinding force is reduced, which can reduce defects such as edge cracking caused by excessive grinding during the machining process; 3. An arc transition 14 is formed at the exit position of the last waveform of the milling cutter blade 13 to reduce the root point and stress concentration of the milling cutter blade 13.

[0060] The experimental data are shown in the following table:

[0061] Comparison of the state of the grinding wheel after grinding Figure 5 and Figure 6 As shown, it can be seen that the milling cutter blade 13 after one grinding by the conventional grinding wheel is in a state of micro-collapse, while the present application performs excellently.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A grinding wheel for processing a wave-edge milling cutter, characterized in that: include: A grinding wheel body (1), wherein the cross section of the grinding wheel body (1) comprises a grinding portion (2), and the cross section of the grinding portion (2) comprises a straight line segment (3), a first arc segment (4), a second arc segment (5), a third arc segment (6) and a fourth arc segment (7); The first arc segment (4) and the third arc segment (6) are arc-shaped depressions relative to the grinding wheel body (1); The second arc segment (5) and the fourth arc segment (7) are arc-shaped protrusions relative to the grinding wheel body (1); One end of the first arc segment (4) is connected to one end of the second arc segment (5); One end of the third arc segment (6) is connected to one end of the fourth arc segment (7); The other end of the second arc segment (5) and the other end of the third arc segment (6) are in a straight line or curve transition; The straight line segment (3) is located on a side of the first arc segment (4) away from the second arc segment (5), and the straight line segment (3) is connected to the other end of the first arc segment (4).

2. A grinding wheel for processing wave-edge milling cutters according to claim 1, characterized in that: A horizontal reference line (101) is made along the axis of the grinding wheel body (1); The straight line segment (3) is arranged obliquely, and gradually approaches the horizontal reference line (101) from one end connected to the first arc segment (4) to the other end, and the angle between the straight line segment (3) and the horizontal reference line (101) is 5° to 8°.

3. A grinding wheel for processing a wave-edge milling cutter according to claim 2, characterized in that: The vertical line where the connection point of the straight segment (3) and the first arc segment (4) lies is A, the vertical line where the other end point of the straight segment (3) lies is B, the vertical line where the center point of the second arc segment (5) lies is C, and the vertical line where the center point of the third arc segment (6) lies is D; The distance from A to C is smaller than the distance from C to D, and the distance from B to C is larger than the distance from C to D.

4. A grinding wheel for processing wave-edge milling cutters according to claim 3, characterized in that: The vertical line where the center point of the fourth arc segment (7) is located is E, wherein the distance from C to D is equal to the distance from D to E.

5. A grinding wheel for processing wave-edge milling cutters according to claim 4, characterized in that: The radius of the second arc segment (5) is smaller than the radius of the fourth arc segment (7), and the distance from the top of the arc of the second arc segment (5) to the horizontal reference line (101) is smaller than the distance from the top of the arc of the fourth arc segment (7) to the horizontal reference line (101).

6. A grinding wheel for processing wave-edge milling cutters according to claim 5, characterized in that: The radius of the second arc segment (5) is R2, and the radius of the fourth arc segment (7) is R4, wherein 0.7*R4≤R2≤0.9*R4.

7. A grinding wheel for processing a wave-edge milling cutter according to claim 6, characterized in that: The radius of the first arc segment (4) is smaller than the radius of the third arc segment (6), the distance from the arc bottom end of the first arc segment (4) to the horizontal reference line (101) is smaller than the distance from the arc bottom end of the third arc segment (6) to the horizontal reference line (101), and the distance from each point of the straight line segment (3) to the horizontal reference line (101) is smaller than the distance from the arc bottom end of the third arc segment (6) to the horizontal reference line (101).

8. A grinding wheel for processing a wave-edge milling cutter according to claim 7, characterized in that: The radius of the first arc segment (4) is R1, and the radius of the third arc segment (6) is R3, wherein 0.7*R3≤R1≤0.9*R3.

9. A grinding wheel for processing a wave-edge milling cutter according to claim 8, characterized in that: The cross section of the grinding wheel body (1) also has a first inclined section (8) and a second inclined section (9); One end of the first inclined section (8) is connected to the other end of the straight section (3) and extends radially toward the middle of the grinding wheel body (1); One end of the second inclined section (9) is connected to the other end of the fourth arc-shaped section (7), and extends radially toward the middle of the grinding wheel body (1).

10. A grinding method for processing a wave edge milling cutter, characterized in that: The method of machining a milling cutter blade (13) using a grinding wheel for machining a wave-edge milling cutter according to claim 9 comprises: Step 1: The grinding wheel body (1) is fed stepwise grinding from one side of the end face of the milling cutter blade (13) according to one pitch (10) along the axial direction of the milling cutter blade (13), and the cutting is fed radially according to the wave height of the milling cutter waveform, wherein one side of the straight line segment (3) is a grinding reference surface (11); Step 2: using the straight line segment (3) to pre-grind the arc back angle of the milling cutter blade (13), and roughly grinding the margin of the back face of the milling cutter blade (13); Step 3: Use the first arc segment (4) to grind the last concave arc of the waveform to form an arc transition connection with the milling cutter handle to remove the sharp point; Step 4: using the second arc segment (5) to perform rough grinding of the wave valley allowance of the milling cutter edge (13); Step 5: Use the third arc segment (6) to correspond to the peak position of the sine curve of the milling cutter blade (13), and the fourth arc segment (7) to correspond to the trough position of the sine curve of the milling cutter blade (13) for final fine grinding.

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