Polishing tool

Abstract

A polishing tool is used for machining the surface of a mold and comprises a cutter bar used for being installed on a CNC machine tool and a cutter bit made of cubic boron nitride materials, and the cutter bit is welded to the cutter bar in a vacuum welding mode. Wherein a plurality of partition grooves are evenly distributed in the outer surface of the tool bit, the ratio of the width of each partition groove to the diameter of the tool bit ranges from 0.04 to 0.06, and the partition grooves are used for reducing resistance borne by the tool bit when the tool bit conducts extrusion polishing on the surface of a mold.

Description

TECHNICAL FIELD

[0001] The utility model relates to CNC processing technical field especially relates to a polishing tool. BACKGROUND

[0002] Polishing is the process of using a polishing tool to direct compressive stress to the surface layer of a workpiece, for example, to improve the surface finish and physical properties of the workpiece. However, the existing polishing usually uses oilstone, sandpaper, polishing paste, wool ball, flannel and other tools, and is mainly operated by manpower, which requires high skills of personnel and is not suitable for precision mold polishing. SUMMARY

[0003] The utility model provides a kind of polishing tool, it aims at at least one of the technical problems existing in prior art.

[0004] The utility model also provides a kind of polishing tool, for processing on mold surface, the polishing tool includes the tool bar for being installed on CNC machine tool and the tool bit made of cubic boron nitride material, the tool bit is welded on the tool bar by vacuum welding;

[0005] Wherein, the outer surface of the tool bit is uniformly distributed with multiple segmentation grooves, the ratio of the width of the segmentation groove and the diameter of the tool bit is in the range of 0.04 to 0.06, for reducing the resistance received by the tool bit when extruding polishing on mold surface.

[0006] In the polishing tool of one embodiment of the utility model, the tool bit has a convex surface in the shape of a circular truncated cone, the diameter of the convex surface gradually decreases from one end close to the tool bar to the other end away from the tool bar.

[0007] In the polishing tool of one embodiment of the utility model, the tool bit has a peripheral surface, the peripheral surface is connected with the convex surface, and the segmentation groove extends from the convex surface along the peripheral surface to the surface of the tool bar.

[0008] In the polishing tool of one embodiment of the utility model, the distance between the surface of the tool bar and the peripheral surface is 0.05mm-0.15mm.

[0009] In the polishing tool of one embodiment of the utility model, the convex surface forms a groove-free area at the intersection area of the segmentation groove, and the depth of the segmentation groove gradually increases from the groove-free area to the side away from the groove-free area.

[0010] In the polishing tool of one embodiment of the utility model, the ratio of the diameter of the groove-free area to the diameter of the convex surface is greater than or equal to 0.7 and less than or equal to 0.8.

[0011] In the polishing tool of the embodiment of the utility model, the ratio of the height of the convex surface to the height of the circumferential surface is greater than or equal to 0.3 and less than or equal to 0.7.

[0012] In the polishing tool of the embodiment of the utility model, the ratio of the maximum depth of the split groove to the diameter of the circumferential surface is greater than or equal to 0.02 and less than or equal to 0.03.

[0013] In the polishing tool of the embodiment of the utility model, the maximum diameter of the tool bit is greater than or equal to 3.5 mm and less than or equal to 4.5 mm.

[0014] In the polishing tool of the embodiment of the utility model, the curvature of the split groove is between 8° and 12°; and / or, the number of the split grooves is four, and the four split grooves are evenly arranged on the outer surface of the tool bit.

[0015] The technical scheme provided by the embodiment of the application can include the following beneficial effects: the application designs a polishing tool, which comprises a tool rod and a tool bit made of cubic boron nitride material, and the tool bit is fixed on the tool rod by vacuum welding to ensure the firm connection between the tool bit and the tool rod and avoid the risk of tool bit falling off during use. The polishing tool can be directly installed on a CNC machine tool to realize automatic polishing and reduce the demand for traditional manual polishing, thereby improving work efficiency. Meanwhile, the outer surface of the tool bit is evenly distributed with a plurality of split grooves, which can reduce the contact area between the tool bit and the mold surface during polishing, thereby reducing the resistance during polishing. The ratio of the width of the split groove to the diameter of the tool bit is between 0.04 and 0.06, which further optimizes the resistance of the polishing tool during polishing and ensures that the polishing effect is more uniform and efficient.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0018] Figure 1 is a structural schematic view of the polishing tool in the prior art;

[0019] Figure 2 is Figure 1 a schematic view of the polishing tool in the embodiment of the utility model at one angle;

[0020] Figure 3 is Figure 1 a disassembled schematic view of a machining tool in the

[0021] Figure 4 is Figure 3 a schematic view of the tool head in one of the angles in the

[0022] Figure 5 is Figure 3 a schematic view of the tool head in the other angle in the

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 10, tool head; 10a, convex surface; 10b, peripheral surface; 11, split groove; 12, groove-free zone;

[0025] 20, tool bar; 21, clearance. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] It should also be understood that the terms used in this specification of the present application are only for the purpose of describing particular embodiments of the present application in specific contexts, and 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" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0028] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] As Figures 1 to 5 shown, the application provides a polishing tool for processing mold surfaces, which comprises a tool bar 20 and a tool head 10. The tool head 10 is welded on the tool bar 20 by vacuum welding to ensure the firm connection between the tool head 10 and the tool bar 20, avoiding the risk of tool head 10 falling off during use. The tool head 10 is made of cubic boron nitride material, which has extremely high hardness and wear resistance, and is suitable for high-precision polishing. The tool bar 20 is used to be installed on a CNC machine tool to realize automatic polishing and reduce the need for traditional manual polishing, thereby improving work efficiency.

[0030] In an optional embodiment, the outer surface of the tool head 10 is uniformly distributed with a plurality of segmentation grooves 11, and the ratio of the width W of the segmentation groove 11 to the diameter D1 of the tool head 10 is within the range of 0.04 to 0.06, which is used to reduce the resistance of the tool head 10 to the mold surface during extrusion polishing, and to ensure that the polishing effect is more uniform and efficient.

[0031] After adopting the above technical scheme, the polishing tool can be controlled by the CNC machine tool to realize automatic polishing, reduce the need for traditional manual polishing, reduce the skill requirements for the operator, reduce the labor intensity, and improve the work efficiency. Since the outer surface of the tool head 10 is uniformly distributed with a plurality of segmentation grooves 11, the contact area between the tool head 10 and the mold surface during polishing can be reduced, thereby reducing the resistance during polishing. At the same time, the ratio of the width of the segmentation groove 11 to the diameter of the tool head 10 is between 0.04 and 0.06, which further optimizes the resistance control during polishing, ensuring that the polishing effect is more uniform and efficient.

[0032] In an optional embodiment, the tool head 10 has a convex surface 10a in the shape of a circular truncated cone, and the diameter of the convex surface 10a gradually decreases from the end close to the tool bar 20 to the end away from the tool bar 20, so that the tool head 10 can uniformly distribute the pressure during polishing, avoiding the problem of local over-polishing or insufficient polishing, thereby improving the uniformity and smoothness of the polished surface.

[0033] With the above technical scheme, since the diameter of the circular truncated cone-shaped convex surface 10a gradually decreases from the end close to the tool bar 20 to the end away from the tool bar 20, the contact between the tool head 10 and the mold surface is gradual, sudden contact pressure is avoided, the impact on the mold surface during polishing is reduced, and the risk of surface damage is reduced. At the same time, the combination design of the circular truncated cone-shaped convex surface 10a and the segmentation groove 11 and the CBN material makes the tool head 10 more stable during high-speed polishing, reduces the possibility of vibration and deviation, not only improves the polishing efficiency and quality, but also reduces the damage risk to the mold surface, prolongs the service life of the tool, and meets the mold polishing requirements of high-precision and complex curved surfaces, further promoting the automation and high efficiency development of the mold processing industry.

[0034] In an optional embodiment, the tool head 10 has a peripheral side surface 10b connected with the convex surface 10a, and the segmentation groove 11 extends from the convex surface 10a along the peripheral side surface 10b to the surface of the tool bar 20, ensuring the continuity of the groove, avoiding stress concentration, and improving the structural strength and stability of the tool head 10, making the tool head 10 more flexible when polishing complex curved surfaces, and better adapting to the curvature changes of the mold surface, especially when dealing with deep cavities or narrow areas. It performs well, ensures uniform distribution of polishing pressure, avoids local over-polishing or under-polishing problems, and thus improves the uniformity and smoothness of the polished surface.

[0035] With the above technical scheme, since it extends to the surface of the tool bar 20, it not only reduces the contact area between the tool head 10 and the mold surface, thereby reducing the frictional resistance during polishing and improving the polishing efficiency, but also better discharges the debris and dust generated during polishing, avoids the influence of debris accumulation on the polishing effect, reduces the secondary friction between the tool head 10 and the mold surface, better disperses the heat generated during polishing, avoids local overheating, and thus prolongs the service life of the tool head 10.

[0036] In an optional embodiment, the distance between the surface of the tool bar 20 and the peripheral side surface 10b is 0.05mm-0.15mm, which not only ensures the close connection between the tool head 10 and the tool bar 20, but also provides sufficient space for the extension of the segmentation groove 11.

[0037] According to the above technical scheme, since the distance between the surface of the tool bar 20 and the peripheral surface 10b is controlled to be between 0.05mm and 0.15mm, higher requirements are put forward to the manufacturing precision, the matching precision between the tool head 10 and the tool bar 20 is ensured, the connection between the tool head 10 and the tool bar 20 is more stable, the vibration of the tool head 10 in the polishing process is reduced, the stress on the tool head 10 in the polishing process is ensured to be uniform, the smoothness and consistency of the polished surface are improved, local stress concentration is avoided, the service life of the tool head 10 is prolonged, and the overall stability and polishing precision of the tool are improved.

[0038] In an optional embodiment, the convex surface 10a forms a groove-free area 12 at the intersection area of the segmentation grooves 11, and the depth of the segmentation grooves 11 gradually increases from the groove-free area 12 to the side away from the groove-free area 12. This not only enables the tool head 10 to maintain a certain continuous contact surface during polishing, avoiding uneven distribution of polishing pressure due to too many segmentation grooves 11, but also improves the structural strength of the tool head 10, avoiding the brittleness problem of the tool head 10 due to too many segmentation grooves 11, thereby prolonging the service life of the tool.

[0039] According to the above technical scheme, since the depth of the segmentation grooves 11 gradually increases from the groove-free area 12 to the side away from the groove-free area 12, the tool head 10 can better adapt to the curvature change of the mold surface during polishing, especially when dealing with complex curved surfaces. Moreover, the polishing pressure can be more evenly distributed, providing a better discharge path for the debris generated during polishing, avoiding the influence of debris accumulation on the polishing effect, or the problem of local over-polishing or under-polishing, thereby improving the uniformity and smoothness of the polished surface. At the same time, the present application can also increase the surface area of the tool head 10, which helps to better disperse the heat generated during polishing and avoid local overheating, thereby prolonging the service life of the tool head 10.

[0040] In an optional embodiment, the ratio of the diameter D3 of the groove-free area 12 to the maximum diameter D1 of the convex surface 10a is greater than or equal to 0.7 and less than or equal to 0.8. This not only enables the polishing pressure to be more evenly distributed between the tool head 10 and the mold surface, avoiding the problem of local over-polishing or under-polishing, thereby improving the uniformity and smoothness of the polished surface, but also reduces the stress concentration of the tool head 10 during polishing, thereby prolonging the service life of the tool head 10.

[0041] With the above technical scheme, since the ratio of the diameter of the non-groove area 12 to the diameter of the convex surface 10a is controlled to be between 0.7 and 0.8, not only can the cutting head 10 ensure that the segmentation groove 11 has enough space to discharge the debris generated in the polishing process, thereby avoiding the influence of the accumulation of the debris on the polishing effect, but also can make the cutting head 10 better disperse heat in the polishing process, thereby avoiding local overheating and prolonging the service life of the cutting head 10. At the same time, the cutting head 10 can be more stable in the polishing process, thereby reducing the possibility of vibration and deviation, ensuring that the cutting head 10 is uniformly stressed in the polishing process, avoiding local stress concentration, improving the polishing precision, and prolonging the service life of the cutting head 10.

[0042] In an optional embodiment, the ratio of the height H2 of the convex surface 10a to the height H1 of the peripheral surface 10b is greater than or equal to 0.3 and less than or equal to 0.7, which not only can make the polishing pressure be more uniformly distributed between the cutting head 10 and the mold surface, thereby avoiding the problems of local excessive polishing or insufficient polishing, thereby improving the uniformity and smoothness of the polished surface, but also can reduce the stress concentration of the cutting head 10 in the polishing process, thereby ensuring that the segmentation groove 11 has enough space to discharge the debris generated in the polishing process, thereby avoiding the influence of the accumulation of the debris on the polishing effect, thereby prolonging the service life of the cutting head 10.

[0043] In an optional embodiment, the ratio of the maximum depth H3 of the segmentation groove 11 to the diameter of the peripheral surface 10b is greater than or equal to 0.02 and less than or equal to 0.03, which not only can effectively reduce the contact area between the cutting head 10 and the mold surface, thereby reducing the frictional resistance in the polishing process and improving the polishing efficiency, but also can make the polishing pressure be more uniformly distributed between the cutting head 10 and the mold surface, thereby avoiding the problems of local excessive polishing or insufficient polishing, thereby improving the uniformity and smoothness of the polished surface.

[0044] In an optional embodiment, the maximum diameter of the cutting head 10 is greater than or equal to 3.5 mm and less than or equal to 4.5 mm, which not only can make the cutting head 10 easily enter a narrow area for polishing, such as the polishing of a deep cavity mold or a small structure, but also can make the cutting head 10 cover a larger area in the polishing process, thereby improving the polishing efficiency. The maximum diameter of the cutting head 10 is equal to the maximum diameter D1 of the convex surface 10a and the diameter of the peripheral surface 10b.

[0045] In an alternative embodiment, the arc of the split groove 11 is between 8° and 12°, which not only effectively reduces the contact area between the tool head 10 and the mold surface, thereby reducing the frictional resistance in the polishing process and improving the polishing efficiency, but also enables the polishing pressure to be more evenly distributed between the tool head 10 and the mold surface, thereby avoiding the problems of excessive polishing or insufficient polishing in some areas, and thus improving the uniformity and smoothness of the polished surface.

[0046] In an alternative embodiment, the number of split grooves 11 is four, and the four split grooves 11 are evenly arranged on the outer surface of the tool head 10, which not only effectively reduces the contact area between the tool head 10 and the mold surface, thereby reducing the frictional resistance in the polishing process and improving the polishing efficiency, but also enables the polishing pressure to be more evenly distributed between the tool head 10 and the mold surface, thereby avoiding the problems of excessive polishing or insufficient polishing in some areas, and thus improving the uniformity and smoothness of the polished surface.

[0047] In an alternative embodiment, the tool bar 20 further has a clearance 21, and the diameter of the clearance 21 is less than the maximum diameter D1 of the convex surface 10a.

[0048] In an alternative embodiment, the tool bar 20 is made of hard alloy material.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. It can be a mechanical connection, or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] The foregoing disclosure provides many different embodiments or examples for implementing different structures of the present application. For simplicity of disclosure, the foregoing description has focused on a particular example of a component or a particular example of a process flow. In the interest of simplifying the present disclosure, the foregoing description has not provided variations of the components or the process flow that can be used in different examples. It is to be understood that the disclosure is intended to encompass all such variations, modifications and other implementations of the present application as well as many others not particularly recited herein. Additionally, it is to be understood that the description of a particular example or implementation should not necessarily be taken as an implicit indication that such a particular example or implementation is not an embodiment of the present application.

[0052] In the description of the present application, the terms "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example" or "some examples" are intended to mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. The appearances of the above terms in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A polishing tool for machining the surface of a mold, characterized in that, The polishing tool includes a tool holder for mounting on a CNC machine tool and a tool head made of cubic boron nitride material, the tool head being welded to the tool holder by vacuum welding; The cutter head has multiple dividing grooves evenly distributed on its outer surface. The ratio of the width of the dividing grooves to the diameter of the cutter head is in the range of 0.04 to 0.06, which is used to reduce the resistance encountered by the cutter head when it extrudes and polishes the mold surface.

2. The polishing tool according to claim 1, characterized in that, The cutter head has a convex surface in the shape of a frustum, and the diameter of the convex surface gradually decreases from the end near the cutter bar to the end away from the cutter bar.

3. The polishing tool according to claim 2, characterized in that, The cutter head has a peripheral side surface connected to the protruding surface, and the dividing groove extends from the protruding surface along the peripheral side surface to the surface of the cutter bar.

4. The polishing tool according to claim 3, characterized in that, The distance between the surface of the tool holder and the peripheral side is 0.05mm to 0.15mm.

5. The polishing tool according to claim 3, characterized in that, The protruding surface forms a grooveless area in the intersection region of the dividing grooves, and the depth of the dividing grooves gradually increases from the grooveless area to the side away from the grooveless area.

6. The polishing tool according to claim 5, characterized in that, The ratio of the diameter of the grooveless region to the maximum diameter of the protruding surface is greater than or equal to 0.7 and less than or equal to 0.

8.

7. The polishing tool according to claim 3, characterized in that, The ratio of the height of the protruding surface to the height of the peripheral surface is greater than or equal to 0.3 and less than or equal to 0.

7.

8. The polishing tool according to claim 3, characterized in that, The ratio of the maximum depth of the dividing groove to the diameter of the circumferential surface is greater than or equal to 0.02 and less than or equal to 0.

03.

9. The polishing tool according to claim 1, characterized in that, The maximum diameter of the cutter head is greater than or equal to 3.5 mm and less than or equal to 4.5 mm.

10. The polishing tool according to claim 1, characterized in that, The arc of the dividing groove is between 8° and 12°; and / or, the number of the dividing grooves is four, and the four dividing grooves are evenly arranged around the outer surface of the cutter head.

Images