A method for machining a grinding mill cutter disc and the grinding mill cutter disc.

Abstract

This invention relates to the field of grinding mill cutter head manufacturing technology, specifically to a processing method for a grinding mill cutter head and a grinding mill cutter head itself. A processing method for a grinding mill cutter head includes the following steps: positioning the cutter head workpiece such that one unprocessed cutter group area on the end face to be processed of the workpiece faces the processing station; using a machining tool, a cutting tool is used to feed into the cutter group area at the corresponding processing station to process a set of equidistant and linearly extending V-shaped cutting grooves, such that the edges between adjacent V-shaped cutting grooves form a set of toothed cutting edges; wherein the end face to be processed of the cutter head workpiece is divided into several cutter group areas in the circumferential direction; after processing the current cutter group area, steps S1-S2 are repeated until all cutter group areas are processed; the V-shaped cutting grooves include through-cutting grooves and edge cutting grooves, which can effectively prevent the formation of annular grinding marks on the cutting surface after wear, thereby improving the service life of the cutter head.

Description

Technical Field

[0001] This invention relates to the field of grinding mill cutter head manufacturing technology, specifically to a processing method for grinding mill cutter heads and a grinding mill cutter head. Background Technology

[0002] The mill cutter head is a key component in plastic recycling equipment, primarily used to crush and grind waste plastics into fine particles for subsequent recycling. With increasingly stringent environmental regulations, the plastic recycling industry demands higher efficiency and durability from its equipment. As a core wear part of the mill, the cutter head's structural design and manufacturing quality directly affect the equipment's efficiency and lifespan. Traditional cutter heads typically employ a V-shaped cutting groove design, achieving efficient cutting through multiple sets of rotationally symmetrical blades. This design is widely used in the crushing and processing of materials such as plastics and rubber, helping to improve resource recycling rates, reduce environmental pollution, and offering significant environmental benefits.

[0003] However, traditional cutting head machining methods have certain shortcomings. When machining edge grooves, the tool's feed path often penetrates into the through groove of the adjacent tool group area, resulting in a weak inner end structure of the rake face of the edge groove, which is prone to wear and tear over time. Figure 1 The annular wear marks shown are a significant issue. This type of wear not only reduces the cutting efficiency of the cutter head but also shortens its service life and increases equipment maintenance costs. Therefore, an improved cutter head machining method is urgently needed to enhance the structural strength of the edge grooves, avoid the formation of annular wear marks, and thus extend the service life and stability of the cutter head. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a processing method for a grinding mill cutter disc, which strengthens the inner end of the edge groove, effectively preventing the formation of annular grinding marks on the cutter surface after wear, and improving the service life of the cutter disc.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A method for machining a grinding mill cutter disc includes the following steps:

[0007] S1. Position the cutter head workpiece so that one of the unprocessed tool group areas on the workpiece's end face to be machined is directly facing the machining station.

[0008] S2. Using a machining machine tool, a machining tool is used to feed into the tool group area of ​​the corresponding machining station to process a set of V-shaped cutting grooves that are equidistantly arranged and extend in a straight line, and the edges between each adjacent V-shaped cutting groove form a set of toothed cutting edges.

[0009] S3, where the workpiece to be machined is divided into several tool group areas in the circumferential direction. After the current tool group area is machined, repeat steps S1-S2 until all tool group areas are machined.

[0010] The workpiece of the cutter head is annular, and the V-shaped cutting groove includes a through cutting groove and an edge cutting groove. In the same cutter group area, a set of edge cutting grooves is set on the front side of the cutting direction A corresponding to a set of through cutting grooves. There is a pre-set boundary between a pair of adjacent cutter group areas, and the position of the boundary corresponds to the outer edge of the outermost through cutting groove.

[0011] Step S2, the process of machining the V-shaped cutting groove includes:

[0012] S21, the feed path of the machining tool enters the tool assembly area from the outer edge of the workpiece on the tool disc;

[0013] S22. If the tool's feed path does not encounter any boundary obstruction, the tool's feed path penetrates the edge of the inner ring of the workpiece to form a through-cutting groove, and the boundary line of a pair of tool groups corresponds to the edge of the outermost through-cutting groove.

[0014] If the tool's feed path encounters a boundary obstruction, the tool's feed path will stop near the boundary to form an edge groove.

[0015] Furthermore, in a method for processing a mill cutter disc in this application, the processing tool is a milling cutter, a cutter head is fixed on the outer periphery of the milling cutter disc, and a pair of first and second cutting edges intersecting in a V-shape are provided on the front cutting face of the cutter head at one end away from the rotation center of the milling cutter.

[0016] Wherein, the first cutting edge is used to machine the back face of the cutting edge, and the second cutting edge is used to machine the front face of the cutting edge;

[0017] During the rotation of the milling cutter, the angle between the generatrices on the pair of rotating surfaces formed by the first and second cutting edges is an acute angle. Furthermore, in step S2, the straight direction of the milling cutter's feed is perpendicular to the rotation axis of the milling cutter. This ensures that when machining the edge groove, the first cutting edge can create a chip removal slope when the milling cutter moves to the inner end of the edge groove. As a preferred embodiment of this application, it should be noted that the cutting edge face on the front side of the cutting direction A is the rake face, and the cutting edge face on the rear side is the flank face. Based on the above method, a chip removal slope intersecting the reinforcing surface can be formed at the end of the edge groove near the reinforcing surface. During the cutting process, the chip removal slope guides the plastic particles located at the end of the edge groove, preventing material accumulation at the end of the edge groove. If material accumulation is severe, overheating and scorching can occur in the accumulated area during grinding, especially at high speeds. In traditional milling methods, the cutting edge is often located at the front end of the milling cutter, which means that the chip removal slope cannot be formed in one step and needs to be ground in the next process. The method described in this application can complete the milling of the chip removal slope in one step when machining the edge groove, which has the advantage of high machining efficiency.

[0018] Furthermore, in the processing method of the milling cutter disc of this application, during the rotation of the milling cutter, the rotational surface formed by the second cutting edge is perpendicular to the rotation axis of the milling cutter. As a preferred embodiment of this application, if the rotational surface formed by the second cutting edge is not perpendicular to the rotation axis, it will cause a slope to form at the end of the rake face near the reinforced surface located in the edge cutting groove, resulting in a shortening of the rake face, thereby affecting the cutting efficiency at that position.

[0019] An integrated grinding mill cutter disc includes an annular cutter disc body with a blade surface on the body. The blade surface is one end face of the cutter disc body and is divided into several blade groups in the circumferential direction. Each blade group includes a set of V-shaped grooves that are equidistantly arranged and extend in a straight line. The edges between adjacent V-shaped grooves form a set of toothed blades, and each blade group has a pre-defined boundary.

[0020] The V-shaped cutting groove includes a through cutting groove and an edge cutting groove. Within the same tool group area, a set of edge cutting grooves is set on the front side of a set of through cutting grooves corresponding to the cutting direction A. The position of the boundary corresponds to the outer edge of the outermost through cutting groove. The through cutting groove penetrates the inner and outer ring edges of the tool surface, and the outer end of the edge cutting groove penetrates the outer ring edge of the tool surface.

[0021] The inner end of the edge groove is close to the boundary, and a reinforcing surface is formed between the boundary and the inner end of the edge groove.

[0022] Based on the above structure, this application discloses an integrated grinding mill cutter disc. During use, the cutter disc bodies are arranged in pairs, with the blade faces facing each other on both sides. One cutter disc body is fixed, while the other rotates at high speed. The material to be ground enters from the inner circle and exits from the outer circle of the blade face. Due to the V-shaped cutting groove structure, the two sidewalls within the V-shaped cutting groove correspond to the front and rear cutting faces of a pair of blades, respectively. The front cutting face is used for grinding the material, and the rear cutting face is used for discharging the material. In this application, the inner end of the edge cutting groove is close to the boundary, meaning the edge cutting groove does not penetrate the outermost through cutting groove of the adjacent blade group. The reinforcing surface can be used to reinforce the inner end of the edge cutting groove, effectively preventing annular wear marks from forming on the blade face after wear on the inner end of the edge cutting groove, thus improving service life.

[0023] Furthermore, in an integrated grinding mill cutter disc of this application, the front cutting face of the blade is parallel to the axis of the cutter disc body, and the included angle B between the rear cutting face and the front cutting face is an acute angle. As a preferred embodiment of this application, since the discharge direction of the material being ground is from the inner edge to the outer edge of the blade, based on the above structure, the material being ground will not be subjected to axial force when in contact with the front cutting face, thereby avoiding affecting the discharge and ensuring discharge efficiency.

[0024] Furthermore, in an integrated grinding mill cutter disc of this application, the inner end of the edge cutting groove is provided with a chip removal slope. The chip removal slope intersects with the reinforcing surface and the rear and front cutting faces within the edge cutting groove to form sequentially intersecting first, second, and third edge lines, respectively. The edge of the edge cutting groove near the rear cutting face is shorter than the edge near the front cutting face. As a preferred embodiment of this application, the presence of the reinforcing surface causes chip accumulation at the inner end of the edge cutting groove, and the front cutting face within the edge cutting groove is shortened, leading to reduced cutting efficiency. Therefore, based on the above structure, the chip removal slope helps to remove chips from the inner end of the edge cutting groove, preventing material accumulation. Furthermore, based on the structure of the edge cutting groove, the length of the front cutting face within the edge cutting groove can be maximized after the overall length of the edge cutting groove is determined, while facilitating cutting and forming, thereby improving processing efficiency.

[0025] Furthermore, in an integrated grinding mill cutter disc of this application, the edge of the reinforced surface near the edge groove is formed by a set of serrated portions with interlocking tooth roots arranged along the boundary direction. Each serrated portion has a pair of edges including a first edge line and a fourth edge line. The fourth edge line is the edge between the reinforced surface and the rear cutting surface within the edge groove. The tooth root of the serrated portion is less than 0.3 mm from the boundary. As a preferred embodiment of this application, based on the above structure, the overall length of the edge groove and the rear cutting surface within the edge groove can be maximized, improving the grinding efficiency of the cutting edge adjacent to the edge groove, and improving the material discharge efficiency after die-cutting at the corresponding boundary.

[0026] Furthermore, in this application, an integrated grinding mill cutter disc has a generally concave conical side surface, with the inclination angle E of the generatrix of the conical side surface between 5° and 10°. As a preferred embodiment of this application, in use, the ends of the cutter disc bodies of a pair of cutter discs meet to form an annular abrasive cavity with a cross-section that is wider on the inside and narrower on the outside. The material to be ground enters from the inside and exits from the outside, realizing a grinding operation from coarse to fine.

[0027] As can be seen from the above technical solution, the present invention has the following beneficial effects:

[0028] 1. This invention provides a method for machining a grinding mill cutter head, which can machine the cutter head workpiece into a cutter head body, with the machined end face forming the cutting face. Each cutter group area is rotationally symmetrically arranged, and a cutting edge group is formed in each cutter group area. Furthermore, because the tool's feed trajectory stops before reaching the boundary when machining the edge groove, a reinforcing surface exists between the edge groove and the boundary. Compared to the traditional cutter head where the inner end of the edge groove penetrates into the through groove of the adjacent cutting edge group, the inner end of the rake face in the edge groove of this application has the advantage of good structural strength, effectively preventing annular wear marks on the cutting face after wear at this location, thus improving service life. In addition, the milling of the chip removal slope can be completed in one step when machining the edge groove, resulting in high machining efficiency.

[0029] 2. The present invention provides an integrated grinding mill cutter disc, wherein the inner end of the edge cutting groove is close to the boundary, that is, the edge cutting groove does not penetrate the outermost through cutting groove of the adjacent cutting edge group. The reinforcing surface can be used to reinforce the inner end of the edge cutting groove, which can effectively prevent the generation of annular grinding marks on the cutting surface after the inner end of the edge cutting groove is worn, thereby improving the service life. Attached Figure Description

[0030] Figure 1 For existing worn cutterheads;

[0031] Figure 2 This is a plan view of a method for processing a grinding mill cutter head according to an embodiment of this application;

[0032] Figure 3 This is a magnified planar schematic diagram of a pair of blade groups or a pair of blade sets in an embodiment of this application;

[0033] Figure 4 This is a three-dimensional structural schematic diagram of the cutter head body in the embodiment of this application (view 1);

[0034] Figure 5 for Figure 4 A magnified view of a portion of area A in the center circle;

[0035] Figure 6 This is a three-dimensional structural schematic diagram of the cutter head body in the embodiment of this application (viewpoint two);

[0036] Figure 7 for Figure 6 A magnified view of a portion of area B in the center circle;

[0037] Figure 8 This is a diagram showing the positional relationship between the milling cutter and the milling cutter workpiece in a milling cutter head machining method according to an embodiment of this application.

[0038] Figure 9 for Figure 8 A magnified view of a portion of area C in the middle circle;

[0039] Figure 10 This is a diagram showing the positional relationship between the rotating body formed by the milling cutter after rotation and the workpiece of the milling cutter in a milling cutter cutting method according to an embodiment of this application.

[0040] Figure 11 for Figure 10 A magnified view of a portion of area D in the center circle;

[0041] Figure 12 This is a schematic diagram showing the boundary coinciding with the initial centerline L in an embodiment of this application;

[0042] Figure 13 This is a front plan view of an integrated grinding mill cutter head according to Embodiment 3 of this application;

[0043] Figure 14 for Figure 13 A magnified view of a pair of blade sets in the image;

[0044] Figure 15 This is a diagram showing the positional relationship between the boundary of the cutter head of an integrated grinding mill and the initial center line L in Embodiment 3 of this application;

[0045] Figure 16 This is a schematic diagram of the paired cutterhead bodies used in the embodiments of this application;

[0046] Figure 17 This is a schematic diagram of the traditional milling cutter method for machining V-shaped grooves.

[0047] In the diagram: 10 - cutter head body; 110 - V-shaped cutting groove; 1100 - boundary; 1101 - through cutting groove; 1102 - edge cutting groove; 111 - cutting edge; 112 - reinforced surface; 1121 - fourth edge line; 113 - chip removal slope; 1131 - first edge line; 1132 - second edge line; 1133 - third edge line;

[0048] 2-End mill; 21-Cutter head; 211-First cutting edge; 212-Second cutting edge. Detailed Implementation

[0049] Combination Figures 2 to 3The method for processing a grinding mill cutter disc includes the following steps:

[0050] S1. Position the cutter head workpiece so that one of the unprocessed tool group areas on the workpiece's end face to be machined is directly facing the machining station.

[0051] S2. Using a machining machine tool, a machining tool is used to feed into the tool group area of ​​the corresponding machining station to process a set of V-shaped cutting grooves 110 that are equidistantly arranged and extend in a straight line, and the edges between each adjacent V-shaped cutting groove 110 form a set of toothed cutting edges 111.

[0052] S3, where the workpiece to be machined is divided into several tool group areas in the circumferential direction. After the current tool group area is machined, repeat steps S1-S2 until all tool group areas are machined.

[0053] The workpiece of the cutter head is annular, and the V-shaped cutting groove 110 includes a through cutting groove 1101 and an edge cutting groove 1102. In the same cutter group area, a set of edge cutting grooves 1102 is set on the front side of a set of through cutting grooves 1101 corresponding to the cutting direction A. A boundary 1100 is preset between a pair of adjacent cutter group areas, and the position of the boundary 1100 corresponds to the outer edge of the outermost through cutting groove 1101.

[0054] In step S2, the process of machining the V-shaped cutting groove 110 includes:

[0055] S21, the feed path of the machining tool enters the tool assembly area from the outer edge of the workpiece on the tool disc;

[0056] S22. If the tool's feed path does not encounter the obstruction of the boundary 1100, the tool's feed path penetrates the edge of the inner ring of the workpiece to form a through-cutting groove 1101, and the boundary line of a pair of tool groups corresponds to the edge of the outermost through-cutting groove 1101.

[0057] If the tool's feed path encounters a blockage at boundary 1100, the tool's feed path will stop near boundary 1100 to form an edge groove 1102.

[0058] Based on the above method, the cutter head workpiece can be machined into a cutter head body 10, the machined end face forms the cutting face, each cutter group area is rotationally symmetrically arranged, and a cutting edge group is formed on each cutter group area; it should be noted that, as Figure 3As shown, the cutting direction A is the rotation direction of the cutter head body 10 relative to the material when grinding the material; and because the tool's feed path stops before reaching the boundary 1100 when machining the edge groove 1102, a reinforcing surface 112 exists between the edge groove 1102 and the boundary 1100. Compared with the traditional cutter head edge groove 1102 where the inner end penetrates into the through groove 1101 of the adjacent cutting edge group, the inner end of the rake face in the edge groove 1102 of this application has the advantage of good structural strength, which can effectively prevent wear on the cutting surface due to wear at this position. Figure 1 The annular wear marks shown indicate improved service life.

[0059] Furthermore, in this embodiment, combined with Figures 8 to 11 As shown, the machining tool is a milling cutter 2. A cutter head 21 is fixed on the outer periphery of the milling cutter 2. The cutter head 21 is fixed on the outer periphery of the milling cutter 2 cutter disc. A pair of first cutting edges 211 and second cutting edges 212 that intersect in a V-shape are provided at one end of the cutting face of the cutter head 21 away from the rotation center of the milling cutter 2.

[0060] Wherein, the first cutting edge 211 is used to process the back face of the cutting edge 111, and the second cutting edge 212 is used to process the front face of the cutting edge 111;

[0061] During the rotation of the milling cutter 2, the angle between the generatrices on the pair of rotating surfaces formed by the first cutting edge 211 and the second cutting edge 212 is an acute angle. Furthermore, in step S2, the straight line direction of the milling cutter 2's feed is perpendicular to the rotation axis of the milling cutter 2. This ensures that when machining the edge groove 1102, when the milling cutter 2 moves to the inner end of the edge groove 1102, the first cutting edge 211 can machine a shape such as... Figure 4 and Figure 5 The chip removal slope 113 is shown.

[0062] It should be noted that the cutting edge 111 on the front side of the cutting direction A is the rake face, and the cutting edge on the rear side is the flank face. Based on the above method, a chip removal slope 113 intersecting with the reinforcing surface 112 can be formed at one end of the edge groove 1102 near the reinforcing surface 112. During the cutting process, the chip removal slope 113 is used to guide the plastic particles located at the end of the edge groove 1102, preventing material accumulation at the end of the edge groove 1102. If the material accumulation is severe, overheating and scorching will occur in the material accumulation area during the grinding process, especially at high speeds. However, traditional milling methods, such as Figure 17 As shown, the cutting edge is often located at the front end of the milling cutter, which means that the chip removal slope 113 cannot be formed in one step and needs to be ground in the next process. The method described above in this application can complete the milling of the chip removal slope 113 in one step when machining the edge groove 1102, which has the advantage of high processing efficiency.

[0063] In this embodiment, as Figure 9 As shown, during the rotation of the milling cutter 2, the rotational surface formed by the second cutting edge 212 is perpendicular to the rotation axis of the milling cutter 2. If the rotational surface formed by the second cutting edge 212 is not perpendicular to the rotation axis, a slope will be formed at the end of the rake face near the reinforced surface 112 located in the edge groove 1102, resulting in a shortening of the rake face and thus affecting the cutting efficiency at that position.

[0064] like Figures 2 to 3 The integrated grinding mill cutter disc shown includes an annular cutter disc body 10. The cutter disc body 10 is provided with a blade surface, which is one end face of the cutter disc body 10. The blade surface is divided into several blade groups in the circumferential direction. Each blade group includes a set of V-shaped grooves 110 that are equidistantly arranged and extend in a straight line. The edges between adjacent V-shaped grooves 110 form a set of toothed blades 111. A boundary 1100 is preset between each blade group.

[0065] The V-shaped cutting groove 110 includes a through cutting groove 1101 and an edge cutting groove 1102. In the same tool group area, a set of edge cutting grooves 1102 is arranged on the front side of a set of through cutting grooves 1101 corresponding to the cutting direction A. The position of the boundary 1100 corresponds to the outer edge of the outermost through cutting groove 1101. The through cutting groove 1101 penetrates the inner and outer ring edges of the tool surface, and the outer end of the edge cutting groove 1102 penetrates the outer ring edge of the tool surface.

[0066] The inner end of the edge groove 1102 is close to the boundary 1100, and a reinforcing surface 112 is formed between the boundary 1100 and the inner end of the edge groove 1102.

[0067] Based on the above structure, the integrated grinding mill cutter disc of this application is used in pairs, with the cutter disc bodies 10 facing each other on both sides. One cutter disc body 10 is fixed, while the other cutter disc body 10 rotates at high speed. The material to be ground enters from the inner circle and exits from the outer circle of the cutter face. Due to the structure of the V-shaped cutting groove 110, the two side walls inside the V-shaped cutting groove 110 correspond to the front and rear cutting faces of a pair of cutting edges 111, respectively. The front cutting face is used for grinding the material, and the rear cutting face is used for discharging the material. In this application, the inner end of the edge cutting groove 1102 is close to the boundary 1100, that is, the edge cutting groove 1102 does not penetrate the outermost through cutting groove 1101 of the adjacent cutting edge group. The reinforcing surface 112 can be used to reinforce the inner end of the edge cutting groove 1102, which can effectively prevent the generation of annular grinding marks on the cutter face after the inner end of the edge cutting groove 1102 wears down, thereby improving the service life.

[0068] like Figure 6 and Figure 7As shown, in this embodiment of an integrated grinding mill cutter disc, the front cutting face of the blade 111 is parallel to the axis of the cutter disc body 10, and the included angle B between the rear cutting face and the front cutting face of the blade 111 is an acute angle.

[0069] Since the material being ground is discharged from the inner edge to the outer edge of the blade, based on the above structure, the material being ground will not be subjected to an axial force when in contact with the front blade, thus avoiding affecting the discharge and ensuring discharge efficiency. In one embodiment, the included angle B is between 45° and 70°, specifically, the included angle B is 58°.

[0070] like Figure 4 and Figure 5 As shown, in this embodiment, an integrated grinding mill cutter disc has a chip removal slope 113 at the inner end of the edge groove 1102. The chip removal slope 113 intersects with the reinforcing surface 112 and the rear and front cutting surfaces within the edge groove 1102 to form sequentially intersecting first edge lines 1131, second edge lines 1132, and third edge lines 1133. The edge of the edge groove 1102 near the rear cutting surface is shorter than the edge near the front cutting surface. Due to the presence of the reinforcing surface 112, chip accumulation is easily caused at the inner end of the edge groove 1102, and the front cutting surface within the edge groove 1102 is shortened, resulting in reduced cutting efficiency. In response, based on the above structure, a chip removal slope 113 is provided. On the one hand, it helps to remove chips at the inner end of the edge groove 1102 and prevents material accumulation. On the other hand, based on the structure of the edge groove 1102, it can maximize the length of the rake face in the edge groove 1102 after the overall length of the edge groove 1102 is determined, under the premise of convenient cutting and forming (which can be formed by a milling cutter in one pass as described in Example 1), thereby improving the processing efficiency.

[0071] like Figure 5 As shown, in a further embodiment of the integrated grinding mill cutter disc, the edge of the reinforcing surface 112 near the edge groove 1102 is formed by a set of saw teeth with interlocking tooth roots arranged along the boundary 1100 direction. Each saw tooth has a pair of edges including a first edge line 1131 and a fourth edge line 1121. The fourth edge line 1121 is the edge between the reinforcing surface 112 and the back face in the edge groove 1102. The tooth root of the saw tooth is less than 0.3 mm from the boundary 1100.

[0072] Based on the above structure, the overall length of the edge groove 1102 and the rear cutting surface within the edge groove 1102 can be maximized, thereby improving the grinding efficiency of the cutting edge 111 adjacent to the edge groove 1102 and the material discharge efficiency after grinding at the corresponding boundary 1100. Specifically, in one embodiment, the distance from the tooth root of the saw tooth to the boundary 1100 is 0.1 mm.

[0073] Furthermore, such as Figure 16 As shown in this embodiment, the blade surface is generally a concave conical side surface, and the inclination angle E of the generatrix of the conical side surface is between 5° and 10°. Specifically, in one embodiment, the inclination angle E is 7°. In use, the blade surfaces of a pair of blade disc bodies 10 are joined together to form an annular abrasive cavity with a cross-section that is wider on the inside and narrower on the outside. The material to be ground enters from the inside and exits from the outside, realizing a grinding operation from coarse to fine.

[0074] Example 3

[0075] Traditional cutter heads, considering machining costs, often design the angle of the cutting edge 111 relative to the centerline with the shortest possible V-groove 110. Since the shortest line segment pointing to the center of the annular circle is the one running through the inner and outer rings, existing cutter heads often point one of the V-grooves 110 or the rake face towards the center of the cutter head body 10 to improve machining economy. Specifically, for example... Figure 12 As shown, this can be represented as C=0, where C is the angle formed by the projection of boundary 1100 and the initial center line L onto a plane perpendicular to the projection direction in the axial direction, and the initial center line L is the perpendicular line between the outer endpoint of boundary 1100 and the central axis of the workpiece on the cutter head. When C=0, the two lines are parallel or coincident after projection. Figure 5 The corresponding implementation example is this situation.

[0076] The material being ground is mainly discharged from the outer edge of the blade surface by centrifugal force after high-speed rotation. However, during use, there is a certain probability of material accumulation. Once material accumulates, the high-speed rotating blade body 10 will rub against the material, causing it to heat up and burn. There are many factors that affect material accumulation, such as excessive feed, uneven shape of the material being ground, and excessive rotation speed of the blade body 10.

[0077] In this embodiment, further, wherein, as Figures 13 to 15 As shown, boundary 1100 is inclined relative to the initial centerline L, and the inner endpoint of boundary 1100 is in front of the centerline L in the cutting direction A; and C+D+360 / n<45°, where D is the angle formed by the axial projection of the lines connecting the two ends of boundary 1100 to the center of the workpiece on the cutter head onto a plane perpendicular to the projection direction. When C is determined, D is related to the ratio of the inner and outer rings of the ring on which the cutter face is located, and the ratio of the inner and outer rings of the ring is a constant due to the limited installation space, and n is the number of cutter groups, which is between 20 and 45.

[0078] In this embodiment, based on the above structure, when the cutter head body 10 rotates relative to the material being cut in the cutting direction A, the front cutting face of each blade 111 can generate a radially outward thrust on the material being cut when it comes into contact with the material being ground, so as to accelerate the material being discharged outward and prevent the material being ground from burning due to insufficient discharge time.

[0079] In this embodiment, since the cutter heads 10 are used in pairs, unlike mirror symmetry, a pair of cutter heads 10 are rotated 180°. At this time, the blades 111 on both sides form a cross-cutting action. Since C+D+360 / n<45°, the included angle between the front faces of each pair of blades 111 that are cross-cutting is an acute angle, which can generate an effective external extrusion force on the material being cut.

[0080] It should be noted that if the included angle C is too large, it will affect the effectiveness of grinding. To balance grinding effectiveness and material discharge efficiency, the range of included angle C was optimized after verification, resulting in a range between 12° and 20°. In this specific implementation, the included angle C is 16°. The number of blade sets n is 36, and the included angle D is 10°.

[0081] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A method for processing a grinding mill cutter disc, characterized in that, Includes the following steps: S1. Position the cutter head workpiece so that one of the unprocessed tool groups on the workpiece's end face is directly facing the machining station. S2. Using a machining machine tool, a machining tool is used to feed into the tool group area of ​​the corresponding machining station to process a set of V-shaped cutting grooves (110) that are equidistantly arranged and extend in a straight line, and the edges between each adjacent V-shaped cutting groove (110) form a set of toothed cutting edges (111). S3, where the workpiece to be machined is divided into several tool group areas in the circumferential direction. After the current tool group area is machined, repeat steps S1-S2 until all tool group areas are machined. The workpiece of the cutter head is annular, and the V-shaped cutting groove (110) includes a through cutting groove (1101) and an edge cutting groove (1102). In the same cutter group area, a set of edge cutting grooves (1102) is set on the front side of a set of through cutting grooves (1101) corresponding to the cutting direction A. A boundary (1100) is preset between a pair of adjacent cutter group areas. The position of the boundary (1100) corresponds to the outer edge of the outermost through cutting groove (1101). In step S2, the process of machining the V-shaped cutting groove (110) includes: S21, the feed path of the machining tool enters the tool assembly area from the outer edge of the workpiece on the tool disc; S22. If the tool's feed path does not encounter the obstruction of the boundary (1100), the tool's feed path penetrates the edge of the inner ring of the workpiece to form a through-cutting groove (1101), and the boundary line of a pair of tool groups corresponds to the edge of the outermost through-cutting groove (1101). If the tool's feed path encounters a boundary (1100), the tool's feed path will stop before the boundary (1100) to form an edge groove (1102). The machining tool is a milling cutter (2). A cutting head (21) is fixed on the outer periphery of the milling cutter (2). The cutting head (21) is fixed on the outer periphery of the milling cutter (2) cutter disc. A pair of first cutting edges (211) and second cutting edges (212) that intersect in a V-shape are provided at one end of the cutting face of the cutting head (21) away from the rotation center of the milling cutter (2). Wherein, the first cutting edge (211) is used to process the back face of the cutting edge (111), and the second cutting edge (212) is used to process the front face of the cutting edge (111); During the rotation of the milling cutter (2), the angle between the generatrices on the pair of rotating surfaces formed by the first cutting edge (211) and the second cutting edge (212) is an acute angle. In step S2, the straight line direction of the milling cutter (2) is perpendicular to the rotation axis of the milling cutter (2), so that when the milling cutter (2) moves to the inner end of the edge cutting groove (1102) during the machining of the edge groove (1102), the first cutting edge (211) can machine a chip removal slope (113).

2. The method for processing a grinding mill cutter disc according to claim 1, characterized in that: During the rotation of the milling cutter (2), the rotating surface formed by the second cutting edge (212) is perpendicular to the rotation axis of the milling cutter (2).

3. An integrated grinding mill cutter disc, characterized in that: Formed based on the processing method described in claim 1; The device includes a ring-shaped cutter head body (10), on which a cutting surface is provided. The cutting surface is one end face of the cutter head body (10), and the cutting surface is divided into several blade groups in the circumferential direction. Each blade group includes a set of V-shaped cutting grooves (110) that are arranged at equal intervals and extend in a straight line. The edges between adjacent V-shaped cutting grooves (110) form a set of toothed blades (111), and each blade group is pre-defined with a boundary (1100). The V-shaped cutting groove (110) includes a through cutting groove (1101) and an edge cutting groove (1102). In the same tool group area, a set of edge cutting grooves (1102) is set on the front side of a set of through cutting grooves (1101) corresponding to the cutting direction A. The position of the boundary (1100) corresponds to the outer edge of the outermost through cutting groove (1101). The through cutting groove (1101) penetrates the inner and outer ring edges of the tool surface, and the outer end of the edge cutting groove (1102) penetrates the outer ring edge of the tool surface. The inner end of the edge groove (1102) is close to the boundary (1100), and a reinforcing surface (112) is formed between the boundary (1100) and the inner end of the edge groove (1102).

4. The integrated grinding mill cutter disc according to claim 3, characterized in that: The front face of the cutting edge (111) is parallel to the axis of the cutter body (10), and the angle B between the rear face and the front face of the cutting edge (111) is an acute angle.

5. The integrated grinding mill cutter disc according to claim 3, characterized in that: The inner end of the edge groove (1102) is provided with a chip removal slope (113). The chip removal slope (113) intersects with the reinforcing surface (112) and the back face and front face in the edge groove (1102) to form a first edge line (1131), a second edge line (1132) and a third edge line (1133) that intersect in sequence. The edge of the edge groove (1102) near the back face is shorter than the edge near the front face.

6. The integrated grinding mill cutter disc according to claim 3, characterized in that: The edge of the reinforced surface (112) near the edge groove (1102) is formed by a set of saw teeth with interlocking tooth roots arranged along the boundary (1100). Each saw tooth has a pair of edges including a first edge line (1131) and a fourth edge line (1121). The fourth edge line (1121) is the edge between the reinforced surface (112) and the back face in the edge groove (1102). The tooth root of the saw tooth is less than 0.3 mm from the boundary (1100).

7. The integrated grinding mill cutter disc according to claim 3, characterized in that: The blade surface is generally concave and tapered, and the inclination angle E of the generatrix of the tapered side is between 5° and 10°.

Images