Cutting tool
By designing overflow grooves and reinforcing ribs on the cutting tool, the problem of poor heat dissipation during cast iron cutting is solved, achieving more efficient heat dissipation and structural strength, extending tool life and reducing production costs.
Patent Information
- Application Number
- CN202423092618.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing cast iron cutting tools suffer from poor heat dissipation during cutting, leading to increased wear and deformation, which affects cutting efficiency and service life.
Multiple recessed overflow grooves facing the lower end face and reinforcing ribs between adjacent overflow grooves are set on the cutting tool to increase the surface area and structural strength, and optimize the coolant flow path.
It improves heat dissipation performance, reduces wear and deformation, extends service life, improves cutting efficiency and machining quality, and reduces production costs.
Smart Images
Figure CN223492089U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal processing, and in particular to a cutting tool. Background Technology
[0002] The chips produced by cutting cast iron are fragmented, and flat inserts are typically used. However, flat inserts have a small surface area, which is not conducive to heat conduction and dissipation, often resulting in poor heat dissipation during the cutting process. Since a large amount of heat is generated during cutting, if it cannot be dissipated in time, it will lead to accelerated tool wear, deformation, and even breakage, seriously affecting cutting efficiency and tool life, thereby affecting machining quality and efficiency. Utility Model Content
[0003] To address the problems existing in the prior art, one objective of this utility model is to provide a cutting tool. The cutting tool of this utility model has multiple overflow grooves recessed towards the lower end face on its upper surface for guiding coolant. Reinforcing ribs are provided between adjacent overflow grooves. The overflow grooves and reinforcing ribs increase the surface area of the cutting tool, thereby solving problems such as poor heat dissipation, low cutting efficiency, and short service life of existing cutting tools.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A cutting tool includes: a tool body having an upper end face and a lower end face spaced apart from each other in the thickness direction; the upper end face is provided with an overflow groove recessed toward the lower end face; there are multiple overflow grooves spaced apart in the circumferential direction of the upper end face; and a reinforcing rib is provided between two adjacent overflow grooves.
[0006] Furthermore, the width of the overflow channel's cross-section gradually decreases towards the lower end face.
[0007] Furthermore, the cross-sectional structure of the overflow channel is either circular or inverted trapezoidal.
[0008] Furthermore, the width of the top of the overflow channel's cross-section is W, and satisfies: 2mm≤W≤5mm; the maximum height of the overflow channel's cross-section is H, and satisfies: 0.6mm≤H≤3mm.
[0009] Furthermore, a plurality of first cutting edges are formed on the upper end face, spaced apart from each other, and a second cutting edge is formed between two adjacent first cutting edges. The second cutting edge is located at the corner of the tool body. The overflow groove includes a first overflow groove and a second overflow groove. The first overflow groove is located inside the first cutting edge, and the second overflow groove is located inside the second cutting edge. The surface area of the second overflow groove is larger than the surface area of the first overflow groove.
[0010] Furthermore, the width of the cross-section of the reinforcing rib gradually increases towards the lower end face.
[0011] Furthermore, the cross-sectional structure of the reinforcing rib is polygonal.
[0012] Furthermore, the width of the bottom of the cross-section of the reinforcing rib is B, and satisfies: 0.8mm≤B≤3mm; the width of the top of the cross-section of the reinforcing rib is b, and satisfies: 0.2mm≤b≤1mm.
[0013] Furthermore, the area of the lower end face is not greater than the area of the upper end face.
[0014] The beneficial effects of this utility model are as follows:
[0015] 1. By designing multiple overflow grooves recessed towards the lower end face, the surface area of the cutting tool is increased, making it easier for the heat generated during the cutting process to be conducted and dissipated through the surface of the cutting tool. This effectively reduces the wear and deformation of the cutting tool caused by high temperature, extends the service life of the cutting tool, and improves cutting efficiency and machining quality.
[0016] 2. The recessed design of the overflow groove reduces the amount of raw materials used in making the blade, thereby reducing production costs.
[0017] 3. The reinforcing ribs formed between two adjacent overflow grooves enhance the structural strength of the cutting tool body, preventing the cutting tool from deforming or breaking due to excessive force during the cutting process, thus improving the reliability and stability of the cutting tool.
[0018] 4. The reinforcing ribs not only enhance the structural strength but also increase the surface area of the cutting tool, further improving its heat dissipation capacity. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0020] Figure 1 This is a structural diagram of a cutting tool;
[0021] Figure 2 This is a top view of the cutting tool;
[0022] Figure 3 This is a cross-sectional view of the stiffener in the NN direction;
[0023] Figure 4 This is a cross-sectional view of the overflow channel in the MM direction.
[0024] Figure label:
[0025] Cutting tool 1;
[0026] Tool body 11;
[0027] Upper end face 12, first cutting edge 121, second cutting edge 122;
[0028] Lower end face 13;
[0029] Overflow channel 14, first overflow channel 141, second overflow channel 142;
[0030] 15 reinforcing ribs. Detailed Implementation
[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0032] The chips produced by cutting cast iron are fragmented, and flat inserts are usually used. However, flat inserts have a small surface area, which is not conducive to heat conduction and dissipation, and can easily affect the service life of the inserts.
[0033] The following is for reference. Figures 1-4 Describes a cutting tool according to an embodiment of the present invention.
[0034] In an embodiment, the cutting tool 1 includes a tool body 11, which has an upper end face 12 and a lower end face 13 spaced apart from each other in the thickness direction. The upper end face 12 is provided with an overflow groove 14 recessed toward the lower end face 13. There are multiple overflow grooves 14, which are spaced apart in the circumferential direction of the upper end face 12. A reinforcing rib 15 is provided between two adjacent overflow grooves 14.
[0035] In this embodiment, the cutting tool 1 defines an upper end face 12 and a lower end face 13 on both sides of the tool body 11 in the thickness direction. The connection between the upper end face 12 and the side surface of the tool body 11 forms the cutting edge of the cutting tool 1. An overflow groove 14 recessed towards the lower end face 13 is provided on the upper end face 12. The overflow groove 14 can be used to drain coolant. Compared with traditional flat inserts, the design of the overflow groove 14 increases the surface area of the cutting tool 1, which helps the heat generated during the cutting process to be more easily conducted and dissipated through the surface of the cutting tool 1, thereby improving the heat dissipation performance of the cutting tool 1. This can effectively reduce the wear and deformation of the cutting tool 1 caused by high temperature, and thus extend the service life of the cutting tool 1. At the same time, there are multiple overflow grooves 14, which are spaced apart in the circumferential direction of the upper end face 12, optimizing the flow path of the coolant. This allows the coolant to flow through more positions on the upper end face 12, effectively carrying away the heat and chips generated during the cutting process, while also playing a role in cooling and dust reduction, improving cutting efficiency and machining quality. Furthermore, the recessed design of the overflow groove 14 can reduce the amount of raw material used in making the cutting tool, thereby reducing production costs. A reinforcing rib 15 is formed between two adjacent overflow grooves 14. The reinforcing rib 15 enhances the structural strength of the cutting tool 1 body, preventing deformation or breakage of the cutting tool 1 due to excessive force during cutting, thus improving the reliability and stability of the cutting tool 1. Simultaneously, the reinforcing rib 15 also increases the surface area of the cutting tool 1, further improving its heat dissipation capacity.
[0036] In one embodiment, the width of the cross-section of the overflow groove 14 gradually decreases in the direction towards the lower end face 13. During the cutting process, the chips generated by cutting can also be discharged through the overflow groove 14. The design of the gradually decreasing width of the cross-section of the overflow groove 14 can reduce the possibility of chip accumulation inside the overflow groove 14, facilitating chip discharge. At the same time, when the coolant flows through the overflow groove 14 to the cutting area to cool the cutting tool 1, the design of the gradually decreasing width of the cross-section of the overflow groove 14 can promote the coolant to flow more concentratedly to the cutting area, improve cooling efficiency, and reduce the adverse effects of cutting heat on the tool and workpiece.
[0037] In one embodiment, the overflow groove 14 has a cross-sectional shape of either an arc or an inverted trapezoid. This arc or inverted trapezoidal cross-section design facilitates smoother discharge of chips or coolant along the overflow groove 14, reducing the likelihood of chip or coolant accumulating or remaining within it, thereby improving cutting efficiency and tool reliability. Compared to other irregularly shaped cross-sections, the arc or inverted trapezoidal structure is mechanically more stable, contributing to enhanced overall structural strength of the cutting tool 1, especially under cutting forces, enabling the cutting tool 1 to more effectively resist deformation and breakage.
[0038] In one embodiment, the width of the top of the cross-section of the overflow groove 14 is W, and satisfies: 2mm ≤ W ≤ 5mm; the maximum height of the cross-section of the overflow groove 14 is H, and satisfies: 0.6mm ≤ H ≤ 3mm. Since the overflow groove 14 can be used for chip removal and coolant diversion, its dimensions need to be rationally designed. For example... Figure 4 As shown, the top width of the overflow groove 14 is W, and satisfies: 2mm ≤ W ≤ 5mm. When W < 2mm, the overflow groove 14 is too narrow, and chips are prone to clogging it. The flow of coolant is also restricted by the overflow groove 14, which reduces the cooling effect of the coolant on the cutting tool 1. When W > 5mm, the overflow groove 14 is too wide, which severely reduces the structural strength of the cutting tool 1 and easily leads to damage to the cutting tool 1 during cutting. Therefore, limiting the value of the top width W of the overflow groove 14 to between 2mm and 5mm ensures that the overflow groove 14 has enough space to accommodate and smoothly discharge the chips generated during cutting and guide the flow of coolant on the upper end face 12. At the same time, it can also avoid the impact of an excessively large overflow groove 14 on the structural strength and cutting performance of the cutting tool 1.
[0039] Similarly, the maximum height H of the overflow groove 14 must satisfy the following condition: 0.6mm ≤ H ≤ 3mm. When H < 0.6mm, the overflow groove 14 is too shallow, resulting in insufficient coolant flow and reduced cooling effect on the cutting tool 1. When H > 3mm, the overflow groove 14 is too deep, reducing the structural strength of the cutting tool 1 and increasing the risk of damage during cutting. Therefore, setting the maximum height H of the overflow groove 14 between 0.6mm and 3mm helps the coolant penetrate more effectively to the vicinity of the cutting edge, ensuring sufficient coolant flow while avoiding the negative impact on the structural strength and cutting performance of the cutting tool 1 due to excessive height.
[0040] In one embodiment, a plurality of first cutting edges 121 spaced apart from each other are formed on the upper end face 12, and a second cutting edge 122 is formed between two adjacent first cutting edges 121. The second cutting edge 122 is located at the corner of the tool body 11. The overflow groove 14 includes a first overflow groove 14114 and a second overflow groove 14214. The first overflow groove 14114 is disposed inside the first cutting edge 121, and the second overflow groove 14214 is disposed inside the second cutting edge 122. The surface area of the second overflow groove 14214 is larger than the surface area of the first overflow groove 14114.
[0041] like Figure 1As shown, the first cutting edge 121 and the second cutting edge 122 are connected in sequence and located in the circumferential edge region of the upper end face 12, which can be understood as the cutting edge of the cutting tool 1. The second cutting edge 122 is located at the corner position of the upper end face 12. During cutting, at least a portion of the first cutting edge 121 and at least a portion of the second cutting edge 122 will cut simultaneously. Therefore, the amount of cutting heat accumulated at the corner is large. At this time, the second overflow groove 14214 located inside the second cutting edge 122 is larger in size and can hold more coolant, which enhances the flow and cooling effect of coolant at the corner, helps to reduce cutting heat, improve cutting quality and the life of the cutting tool 1.
[0042] In one embodiment, the width of the cross-section of the reinforcing rib 15 gradually increases towards the lower end face 13. This gradually decreasing width design of the reinforcing rib 15 helps optimize the stress distribution inside the cutting tool 1. When subjected to cutting forces and vibrations, it allows the stress to be distributed more evenly across all parts of the cutting tool 1, reducing stress concentration and thus lowering the risk of tool breakage due to excessive stress.
[0043] In one embodiment, the reinforcing rib 15 has a polygonal cross-sectional structure. The inclusion of the reinforcing rib 15 increases the structural strength of the cutting tool 1, allowing it to more effectively disperse and resist external forces during cutting, thereby reducing tool deformation and breakage risk, and improving the service life of the cutting tool 1. The polygonal cross-sectional structure of the reinforcing rib 15 helps optimize stress distribution within the tool, and the polygonal structure (e.g., trapezoidal) provides more stable support.
[0044] In one embodiment, the width of the bottom of the cross-section of the reinforcing rib 15 is B, and satisfies: 0.8mm ≤ B ≤ 3mm. The reinforcing rib 15 has the function of strengthening the structural strength of the cutting tool 1 and increasing the surface area of the cutting tool 1 to improve its heat dissipation capacity. Therefore, the dimensional parameters of the reinforcing rib 15 need to be rationally designed, such as... Figure 3 As shown, the bottom width B of the cross-section of the reinforcing rib 15 satisfies: 0.8mm ≤ B ≤ 3mm. When B is less than 0.8mm, the bottom of the reinforcing rib 15 is too narrow, and the reinforcing rib 15 does not have enough bottom support area. The stability of the connection between the reinforcing rib 15 and the upper end face 12 is poor, and it is easy to break during the cutting process. When B is greater than 3mm, the bottom of the reinforcing rib 15 is too wide, and the overall weight is too heavy, making it impossible to achieve weight reduction. Therefore, the bottom width B of the cross-section of the reinforcing rib 15 is between 0.8mm and 3mm. This ensures that the reinforcing rib 15 has sufficient bottom support area while achieving weight reduction of the cutting tool 1. This helps to improve the stability and rigidity of the entire cutting tool 1 when subjected to cutting forces, and can more effectively disperse and resist the pressure and vibration from the cutting operation, thereby extending the tool's service life.
[0045] In one embodiment, the width of the top of the cross-section of the reinforcing rib 15 is b, and satisfies: 0.2mm ≤ b ≤ 1mm. When b is less than 0.2mm, the top of the reinforcing rib 15 is relatively narrow, resulting in low strength and insufficient rigidity for the cutting tool 1. When b is greater than 1mm, the top of the reinforcing rib 15 is relatively wide, leading to high structural strength, but requiring more raw materials and incurring higher costs. This also results in an overall heavier cutting tool 1, hindering weight reduction. Therefore, limiting the value of b to between 0.2mm and 1mm helps to minimize the material usage of the reinforcing rib 15 while ensuring sufficient structural strength, thus achieving weight reduction for the cutting tool 1.
[0046] In one embodiment, the height of the reinforcing rib 15 is h, and it can satisfy 0.6mm≤h≤3mm. Setting the height of the reinforcing rib 15 within the range of 0.6mm to 3mm can ensure the structural strength of the reinforcing rib 15 itself, provide sufficient additional surface area for the cutting tool 1, and will not cause the cutting tool 1 to be too heavy.
[0047] In one embodiment, the area of the lower end face 13 is not greater than the area of the upper end face 12. The lower end face 13, as the main part that contacts or is mounted between the cutting tool 1 and the workpiece, has an area that is not greater than the area of the upper end face 12, which helps to form a clearance area between the cutting tool 1 and the workpiece during the cutting process.
[0048] In some embodiments, the distance between the upper end face 12 and the lower end face 13 forms the thickness T of the blade, and 4.5mm≤T≤10mm.
[0049] In some embodiments, the diameter of the inscribed circle of the upper end face 12 is D, and 12mm≤D≤26mm.
[0050] In some embodiments, the second cutting edge 122 is an arc segment with radius R, and 0.3mm≤R≤2.5mm.
[0051] In some embodiments, a through hole is formed on the upper end face 12, which extends through the tool body 11 in the thickness direction. The through hole is used to assemble the tool body 11 with other connecting components of the cutting tool 1.
[0052] In some embodiments, the lower end face 13 may also be provided with an overflow groove 14.
[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0054] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.
[0055] In the description of this utility model, "multiple" means two or more.
[0056] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.
[0057] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.
[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A cutting tool, characterized in that, include: The tool body (11) has an upper end face (12) and a lower end face (13) spaced apart from each other in the thickness direction. The upper end face (12) is provided with an overflow groove (14) recessed toward the lower end face (13). There are multiple overflow grooves (14), which are spaced apart in the circumferential direction of the upper end face (12). A reinforcing rib (15) is provided between two adjacent overflow grooves (14).
2. The cutting tool according to claim 1, characterized in that, The width of the cross-section of the overflow groove (14) gradually decreases toward the lower end face (13).
3. The cutting tool according to claim 2, characterized in that, The overflow channel (14) has a cross-sectional structure that is either circular or inverted trapezoidal.
4. The cutting tool according to claim 2, characterized in that, The width of the top of the cross-section of the overflow trough (14) is W, and satisfies: 2mm≤W≤5mm; the maximum height of the cross-section of the overflow trough (14) is H, and satisfies: 0.6mm≤H≤3mm.
5. The cutting tool according to claim 1, characterized in that, The upper end face (12) has a plurality of first cutting edges (121) spaced apart from each other, and a second cutting edge (122) is formed between two adjacent first cutting edges (121). The second cutting edge (122) is located at the corner of the tool body (11). The overflow groove (14) includes a first overflow groove (141) and a second overflow groove (142). The first overflow groove (141) is located inside the first cutting edge (121), and the second overflow groove (142) is located inside the second cutting edge (122). The surface area of the second overflow groove (142) is larger than the surface area of the first overflow groove (141).
6. The cutting tool according to claim 1, characterized in that, The width of the cross-section of the reinforcing rib (15) gradually increases toward the lower end face (13).
7. The cutting tool according to claim 6, characterized in that, The cross-sectional structure of the reinforcing rib (15) is polygonal.
8. The cutting tool according to claim 6, characterized in that, The bottom width of the cross-section of the reinforcing rib (15) is B, and satisfies: 0.8mm≤B≤3mm; the top width of the cross-section of the reinforcing rib (15) is b, and satisfies: 0.2mm≤b≤1mm.
9. The cutting tool according to claim 1, characterized in that, The area of the lower end face (13) is not greater than the area of the upper end face (12).