Cutter body and fine boring cutter
By designing a tool body with a three-dimensional groove structure, the problems of high cutting force and low machining accuracy when processing vermicelli cast iron materials are solved, and the effect of reducing cutting force, improving machining accuracy and tool body life is achieved.
Patent Information
- Application Number
- CN202421121402.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-22
AI Technical Summary
When processing vermilion cast iron materials, existing tools are difficult to effectively reduce cutting forces, ensure processing accuracy, and improve tool body life.
A knife body is designed, and its front knife surface includes a first arc surface and a second arc surface to form a three-dimensional groove structure, increasing the sharpness of the knife tip, and forming chip breaking grooves through the second arc surface to reduce Friction between chips and workpieces and tool body.
When processing materials with high strength, this tool body effectively reduces cutting force, reduces cutting temperature, and improves cutting effect and tool body life.
Smart Images
Figure CN222511341U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tooling tools, in particular to a tool body and a precision boring tool. Background Art
[0002] Compared with grey cast iron, which is easier to break, vermicular cast iron has a higher pearlite content and higher strength. The vermicular graphite structure will hinder the expansion of internal defects such as internal cracks when the material is damaged, and it is not easy to break chips. Therefore, the tool body should be sharper during the material finishing process. Utility Model Content
[0003] The utility model discloses a cutter body and a fine boring tool, which can effectively reduce cutting force, ensure machining accuracy and increase the life of the cutter body.
[0004] In order to achieve the above object, the utility model provides the following technical solutions:
[0005] A cutter body comprises a rake face and a mounting face arranged opposite to each other, and a cutter tip, a main cutting edge and a secondary cutting edge connected to the rake face;
[0006] The front cutting edge comprises a first arcuate surface and a second arcuate surface, the first arcuate surface is convex toward a side away from the mounting surface, and the first arcuate surface is connected to the cutting tip, the main cutting edge and the secondary cutting edge; the vertical distance between any position of the first arcuate surface and the mounting surface is smaller than the vertical distance between the cutting tip and the mounting surface;
[0007] The second arc-shaped surface is convex toward one side of the mounting surface, and the second arc-shaped surface is smoothly connected to the first arc-shaped surface.
[0008] The above-mentioned tool body has a relatively large sharpness at the tip of the tool body by designing a suitable three-dimensional groove structure on the front cutting surface, namely, the first arc surface and the second arc surface, so that the tool tip of the tool body has a relatively large sharpness, is easy to cut materials with relatively large strength, and is easy to roll and break chips. Specifically, the tool body of the embodiment of the present application includes a first arc surface and a second arc surface arranged on the front cutting surface, that is, the groove structure on the front cutting surface is composed of two arc units. Among them, the first arc surface connects the tool tip, the main cutting edge and the secondary cutting edge, and protrudes toward the side away from the mounting surface, and the vertical distance between any position in the first arc surface and the mounting surface is less than the vertical distance between the tool tip and the mounting surface. Compared with the negative chamfer of the circular arc groove structure in the prior art, the first arc surface increases the sharpness of the tool body on the basis of ensuring the strength of the tool tip, reduces the cutting force during fine machining, reduces the cutting temperature, and can improve the cutting effect and the life of the tool body. The second arc surface is convex toward the mounting surface and is smoothly connected to the first arc surface, forming a chip breaker groove for chips to flow into, which is beneficial to chip breaking, reduces friction between chips and the workpiece and the tool body, and improves the workpiece surface quality and tool body life.
[0009] In some embodiments, the vertical distance between the tool tip and the mounting surface is greater than the vertical distance between the main cutting edge and the mounting surface, and the vertical distance between the tool tip and the mounting surface is greater than the vertical distance between the secondary cutting edge and the mounting surface.
[0010] In some embodiments, the orthographic projection of the first arcuate surface on the mounting surface covers the orthographic projection of the main cutting edge on the mounting surface.
[0011] In some embodiments, the blade body includes a plurality of blade tips, and any one of the blade tips is connected to the only one second arcuate surface through the only one first arcuate surface;
[0012] Among two adjacent knife tips, the second arc surface connected to one knife tip is smoothly connected to the second arc surface connected to the other knife tip.
[0013] In some embodiments, the tangent plane of the first arcuate surface at the tool tip and the parallel direction of the mounting surface form a first rake angle; the angle of the first rake angle is 5°-20°.
[0014] In some embodiments, a tangent plane at a connection point between the first arcuate surface and the second arcuate surface and a parallel direction to the mounting surface form a second rake angle; the angle of the second rake angle is 10°-25°.
[0015] In some embodiments, the blade body further includes a back blade surface, the back blade surface connects the front blade surface and the mounting surface, and the back blade surface and the normal direction of the mounting surface form a back angle opening toward the mounting surface; the angle of the back angle is 5°-15°.
[0016] In some embodiments, the flank surface includes a main flank surface and a secondary flank surface, and the main flank surface and the secondary flank surface are connected by a circular arc surface transition.
[0017] In some embodiments, the outer contour of the orthographic projection of the blade body on the mounting surface includes any one of a triangle, a quadrilateral, a C shape, a D shape, a V shape, an S shape, and a T shape.
[0018] A fine boring tool comprises the tool body. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of a traditional arc-shaped slot;
[0020] Figure 2 A schematic diagram of the partial structure of a knife body provided in an embodiment of the utility model;
[0021] Figure 3 A schematic diagram of the partial structure of a knife body provided in an embodiment of the utility model;
[0022] Figure 4 A top view of a knife body provided in an embodiment of the utility model;
[0023] Figure 5 A top view of another knife body provided in an embodiment of the utility model;
[0024] Figure 6 A schematic diagram of the structure of a knife body provided in an embodiment of the utility model;
[0025] Figure 7 A schematic diagram of the structure of a knife body provided in an embodiment of the utility model;
[0026] Icons: 1. Front cutting edge; 2. Mounting surface; 3. Tip of cutting tool; 4. Main cutting edge; 5. Secondary cutting edge; 6. Flank face; 7. Arc surface; 11. First arc surface; 12. Secondary arc surface; 61. Main flank face; 62. Secondary flank face. DETAILED DESCRIPTION
[0027] First, let me introduce the application scenarios. Figure 1 As shown in the figure, at present, the tool body with arc-shaped chip breaker structure has a large rake angle, which can make the chips (debris produced by metal processing) curl to a large extent, the arc-shaped chip breaker unit has a high utilization rate, and it is easy to break chips. It has good practicality in engineering. In order to increase the strength of the tool tip, the general finishing tool body has a negative chamfer br, which will make the tool tip blunt, resulting in greater cutting force and higher cutting temperature during processing, affecting the cutting effect and tool body life. In addition, the tool body has a large back angle, which will make the tool body thinner. When processing materials with higher strength, the tool body is prone to breakage.
[0028] Based on the above problems, the embodiments of the present application provide a tool body and a fine boring tool, which can increase the sharpness of the tool body, effectively reduce the cutting force, ensure the processing accuracy, and increase the life of the tool body.
[0029] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.
[0030] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.
[0031] First, as Figure 2-Figure 7 As shown, the embodiment of the present application provides a tool body, comprising a rake face 1 and a mounting face 2 arranged opposite to each other, and a tool tip 3, a main cutting edge 4 and a secondary cutting edge 5 connected to the rake face 1;
[0032] The rake face 1 includes a first arcuate surface 11 and a second arcuate surface 12, the first arcuate surface 11 is convex toward the side away from the mounting surface 2, and the first arcuate surface 11 is connected to the tool tip 3, the main cutting edge 4 and the secondary cutting edge 5; the vertical distance between any position of the first arcuate surface 11 and the mounting surface 2 is smaller than the vertical distance between the tool tip 3 and the mounting surface 2;
[0033] The second arc surface 12 is convex toward one side of the mounting surface 2 , and the second arc surface 12 is smoothly connected to the first arc surface 11 .
[0034] The above-mentioned cutter body is designed with a suitable three-dimensional groove structure on the front cutting face 1, namely the first curved surface 11 and the second curved surface 12, so that the cutting tip 3 of the cutter body has greater sharpness, is easy to cut materials with greater strength, and is easy to curl and break chips. Specifically, as Figure 2 As shown, the blade body of the embodiment of the present application includes a first arc surface 11 and a second arc surface 12 arranged on the front blade surface 1, that is, the groove structure on the front blade surface 1 is composed of two arc units. Among them, the first arc surface 11 connects the blade tip 3, the main cutting edge 4 and the secondary cutting edge 5, and bulges away from the mounting surface 2, and the vertical distance between any position P of the first arc surface 11 and the mounting surface 2 ( Figure 2 (b) is smaller than the vertical distance between the blade tip 3 and the mounting surface 2 ( Figure 2 In other words, the height of the blade tip is greater than the height of any point on the first arc surface 11. The first arc surface 11 and the negative chamfer of the arc groove structure in the prior art ( Figure 1 Compared with the embodiment shown in Figure br in the figure, on the basis of ensuring the strength of the tool tip 3, the sharpness of the tool body is increased, the cutting force during fine machining is reduced, the cutting temperature is lowered, and the cutting effect and tool body life can be improved. The second arc surface 12 is convex toward the side of the mounting surface 2 and is smoothly connected to the first arc surface 11, that is, a chip breaker groove (a tool body structure that helps chips break) is formed for chips to flow into, which is beneficial to chip breaking, reduces the friction between chips and the workpiece and the tool body, and improves the surface quality of the workpiece and the tool body life.
[0035] In some embodiments, the vertical distance between the blade tip 3 and the mounting surface 2 ( Figure 3 (shown in a) is greater than the vertical distance between the main cutting edge 4 and the mounting surface 2 ( Figure 3 c), and the vertical distance between the tip 3 and the mounting surface 2 ( Figure 3 (shown in a) is greater than the vertical distance between the secondary cutting edge 5 and the mounting surface 2 ( Figure 3 (shown in d).
[0036] One possible way to achieve this is as follows: Figure 3 As shown, the height of the tool tip 3 is greater than the height of any point on the main cutting edge 4 and the secondary cutting edge 5. In this way, when the tool body is cutting materials, only the tool tip 3 acts on the material, and the main cutting edge 4 and the secondary cutting edge 5 do not contact the material. The main cutting edge 4 and the secondary cutting edge 5 are far away from the tool tip 3, avoiding secondary processing of the material by the main cutting edge 4 and the secondary cutting edge 5, ensuring the processing quality of the material surface, and at the same time increasing the sharpness of the tool body, reducing cutting force, and reducing cutting heat.
[0037] In some embodiments, the orthographic projection of the first arcuate surface 11 on the mounting surface 2 covers the orthographic projection of the main cutting edge 4 on the mounting surface 2 .
[0038] One possible way to achieve this is as follows: Figure 4 As shown, the first arc surface 11 is connected to the entire main cutting edge 4 of the cutter body, and the length of the second arc surface 12 connected to the first arc surface 11 along the main cutting edge 4 is also increased. When the tool tip 3 at the cutter body A is used for cutting, there can be a larger chip accommodating space, avoiding the friction between the unbroken chips and the cutter body and the workpiece surface, thereby improving the surface quality and tool life.
[0039] In some embodiments, the blade body includes a plurality of blade tips 3, and any blade tip 3 is connected to a single second arcuate surface 12 via a single first arcuate surface 11;
[0040] Of two adjacent knife tips 3 , the second arcuate surface 12 connected to one knife tip 3 is smoothly connected to the second arcuate surface 12 connected to the other knife tip 3 .
[0041] One possible way to achieve this is as follows: Figure 5 As shown, the knife body includes four knife tips 3, each of which is connected to a single second arc surface 12 via a single first arc surface 11. During the use of the knife body, any knife tip 3 can be used to process the workpiece. This arrangement can increase the number of times the knife body is used and increase the overall service life of the knife body.
[0042] Another possible implementation method is Figure 6As shown, the tool body includes four tool tips 3. Similarly, each tool tip 3 is connected to a single second curved surface 12 through a single first curved surface 11. Moreover, in each adjacent two tool tips 3, the second curved surface 12 connected to one tool tip 3 is smoothly connected to the second curved surface 12 connected to another tool tip 3, that is, the four second curved surfaces 12 form a curved surface, and the chip accommodation space is larger. In this way, when a certain tool tip 3 is used for cutting, the friction between the chips and the tool and workpiece surface can be further reduced, the cutting effect can be improved, and the tool life can be increased.
[0043] In some embodiments, Figure 7 As shown, the tangent plane of the first arc surface 11 at the tool tip 3 and the parallel direction of the mounting surface 2 form a first rake angle θ1; the angle of the first rake angle θ1 is 5°-20°. Exemplarily, the angle of the first rake angle θ1 can be 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, etc. By Figure 1 The negative chamfer br is designed as a first arc surface 11 with a certain curvature, which can increase the sharpness of the tool tip 3 on the basis of ensuring the strength of the tool body, reduce the cutting force during fine machining, reduce the cutting temperature, and improve the cutting effect and tool life.
[0044] In some embodiments, Figure 7 As shown, the tangent plane at the connection between the first curved surface 11 and the second curved surface 12 and the parallel direction of the mounting surface 2 form a second rake angle θ2; the angle of the second rake angle θ2 is 10°-25°. Exemplarily, the angle of the second rake angle θ2 can be 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, etc. Through the smooth transition between the first curved surface 11 and the second curved surface 12, and the second curved surface 12 has a larger rake angle, the chips can have a larger curling degree, which is easy to break the chips and reduce the friction between the chips and the workpiece surface and the tool body. Improve the surface quality of the workpiece and extend the life of the tool body.
[0045] In some embodiments, Figure 7As shown, the blade body also includes a back blade face 6, which connects the front blade face 1 and the mounting surface 2, and the back blade face 6 and the normal direction of the mounting surface 2 form a back angle θ3 with the opening facing the mounting surface 2; the angle of the back angle θ3 is 5°-15°. Exemplarily, the angle of the back angle θ3 can be 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc. The blade body of the embodiment of the present application has a smaller back angle, which increases the thickness of the blade body at the blade tip 3, reduces the possibility of the blade tip 3 breaking during the cutting process, and increases the life of the blade body. At the same time, the first curved surface 11 with a certain curvature can ensure the sharpness of the blade body without affecting the cutting effect.
[0046] In some embodiments, Figure 6 As shown, the flank face 6 includes a main flank face 61 and a secondary flank face 62, and the main flank face 61 and the secondary flank face 62 are transitionally connected by an arc surface 7. In order to improve the strength of the tool tip 3 and reduce the surface roughness of the workpiece, an arc surface 7 is provided between the main flank face 61 and the secondary flank face 62 of the embodiment of the present application for transition, and at the same time, a tool tip arc is also formed at the tool tip 3, which not only improves the tool durability, but also improves the surface quality of the workpiece after processing to a certain extent.
[0047] In some embodiments, the outer contour of the orthographic projection of the blade body on the mounting surface includes any one of a triangle, a quadrilateral, a C shape, a D shape, a V shape, an S shape, and a T shape. Figure 2-Figure 7 As shown, the outer contour of the orthographic projection of the tool body on the mounting surface is a quadrilateral.
[0048] The cutter body of the embodiment of the present application has a sharp cutting edge, which can easily obtain a higher surface quality during the fine boring process of vermicular iron with a small cutting depth. The groove structure of the front cutting face 1 of the cutter body of the embodiment of the present application is also conducive to grinding with a flat blade. Compared with conventional pressed groove blades, the present application can adjust the front angle of the cutting tip 1 and the curvature of the second curved surface 12 according to different processing parameters to obtain the most suitable groove, and the life of the cutter body is higher than that of conventional fine boring blades. At the same time, since the cutter body is used for fine processing and the cutting amount is small, reducing the back angle of the cutter body has no effect on processing, which can increase the wear resistance of the cutter body.
[0049] In a second aspect, the present application also provides a fine boring tool, including a tool body as described in the first aspect. Since the fine boring tool includes all the technical features of the tool body, the fine boring tool also includes all the beneficial effects of the tool body, which will not be described in detail here.
[0050] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. A knife body, characterized in that: It includes a rake face and a mounting face which are arranged opposite to each other, and a cutting tip, a main cutting edge and a secondary cutting edge which are connected to the rake face; The front cutting edge comprises a first arcuate surface and a second arcuate surface, the first arcuate surface is convex toward a side away from the mounting surface, and the first arcuate surface is connected to the cutting tip, the main cutting edge and the secondary cutting edge; the vertical distance between any position of the first arcuate surface and the mounting surface is smaller than the vertical distance between the cutting tip and the mounting surface; The second arc-shaped surface is convex toward one side of the mounting surface, and the second arc-shaped surface is smoothly connected to the first arc-shaped surface.
2. The blade body according to claim 1, characterized in that: The vertical distance between the tool tip and the mounting surface is greater than the vertical distance between the main cutting edge and the mounting surface, and the vertical distance between the tool tip and the mounting surface is greater than the vertical distance between the secondary cutting edge and the mounting surface.
3. The blade body according to claim 1, characterized in that: The orthographic projection of the first arcuate surface on the mounting surface covers the orthographic projection of the main cutting edge on the mounting surface.
4. The blade body according to claim 1, characterized in that: The blade body comprises a plurality of blade tips, and any one of the blade tips is connected to the only one second arcuate surface through the only one first arcuate surface; Among two adjacent knife tips, the second arc surface connected to one knife tip is smoothly connected to the second arc surface connected to the other knife tip.
5. The blade body according to claim 1, characterized in that: The tangent plane of the first arc-shaped surface at the tool tip forms a first rake angle in a direction parallel to the mounting surface; the angle of the first rake angle is 5°-20°.
6. The blade body according to claim 1, characterized in that: A tangent plane at the connection between the first arcuate surface and the second arcuate surface and a parallel direction to the mounting surface form a second rake angle; the angle of the second rake angle is 10°-25°.
7. The blade body according to claim 1, characterized in that: The tool body also includes a back cutting edge, which connects the front cutting edge and the mounting surface. The back cutting edge and the normal direction of the mounting surface form a back angle opening toward the mounting surface. The angle of the back angle is 5°-15°.
8. The blade body according to claim 7, characterized in that: The flank surface comprises a main flank surface and a secondary flank surface, and the main flank surface and the secondary flank surface are connected by a circular arc surface transition.
9. The blade body according to claim 1, characterized in that: The outer contour of the orthographic projection of the blade body on the mounting surface includes any one of a triangle, a quadrilateral, a C shape, a D shape, a V shape, an S shape, and a T shape.
10. A fine boring tool, characterized in that: Comprising a knife body as described in any one of claims 1-9.