Nanometer reinforced cutter

Abstract

The utility model discloses a nanometer strengthening cutter, and relates to the technical field of metal surface nanometer strengthening. The depth of the metal nanolayer can be increased, the precision of surface nanocrystallization is improved, the machining efficiency can be improved, and heating is not prone to occurring. The nano reinforced cutter comprises a cutter bracket and a cutter body, the cutter bracket is a U-shaped bracket; the cutter body is of a wheel type structure with a center hole, a reinforcing head is arranged on a wheel flange of the cutter body, and the reinforcing head is a protrusion surrounding the wheel flange in the circumferential direction; the cutter body is connected to the U-shaped support through the connecting shaft assembly. The cutter body is rotationally connected with the connecting shaft assembly through a bearing. The method is used for improving the performance of the nano-reinforced cutter.

Description

Technical Field

[0001] The present application relates to the technical field of metal surface nano-enhancement, and in particular to a nano-enhanced cutting tool. Background Art

[0002] Rolling technology is a plastic processing method that uses rolling tools to apply a certain amount of pressure to the surface of the workpiece, causing the surface metal of the workpiece to flow plastically and fill the depressions, thereby reducing the surface roughness. Due to the plastic deformation of the surface metal, the surface grains become finer, forming a residual stress layer, and the wear resistance, hardness, corrosion resistance and other properties are improved.

[0003] Traditional rolling devices and methods have certain drawbacks. For example, the Chinese patent "A method for preparing gradient nanostructured metal sheets" (publication number: CN114406600A) discloses a method for preparing gradient nanostructured metal sheets, which uses a rolling spherical processing tool to reciprocate and roll on the surface of the metal sheet, and translates in turn. The surface of the metal sheet undergoes local severe plastic deformation to form a gradient nanostructured organization through grain refinement. However, this method has high processing requirements for the spherical tool and tool slot, and during the processing, the spherical tool will inevitably wear and deform, which greatly affects the processing accuracy. In addition, the spherical tool head and the workpiece are in point contact, the processing efficiency is low, and it is easy to heat up. Utility Model Content

[0004] The embodiments of the present application provide a nano-reinforced cutting tool, which can not only deepen the depth of the metal nano-layer and improve the accuracy of the surface nano-crystallization, but also improve the processing efficiency and is not easy to generate heat.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a nano-enhanced tool, including a tool holder and a tool body; the tool holder is a U-shaped holder; the tool body is a wheel-type structure with a center hole, and a strengthening head is provided on the rim of the tool body, and the strengthening head is a protrusion circumferentially surrounding the rim; the tool body is connected to the U-shaped holder through a connecting shaft assembly; the tool body and the connecting shaft assembly are rotatably connected through a bearing.

[0006] Furthermore, the cross section of the strengthening head is a semicircle; the diameter of the semicircle d≤6mm; and the maximum diameter of the rim of the tool body D≤20mm.

[0007] Furthermore, the rim of the tool body is a cylindrical surface.

[0008] Furthermore, the reinforcement head protrudes directly from the wheel rim.

[0009] Furthermore, the reinforcement head protrudes from the wheel rim through a circular arc chamfer.

[0010] Furthermore, there is one strengthening head, which is arranged in the middle of the rim of the tool body.

[0011] Furthermore, there are a plurality of strengthening heads, and the plurality of strengthening heads are arranged in sequence along the axial direction of the tool body.

[0012] Furthermore, two bearing mounting holes are provided in the tool body, and bearings are provided in the bearing mounting holes; the outer ring of the bearing is connected to the tool body, and the inner ring is connected to the connecting shaft assembly.

[0013] Furthermore, both ends of the connecting shaft assembly are connected to the tool support by screws; the connecting shaft assembly is provided with an external thread section, and a nut is connected to the external thread section, and the nut can axially limit the two bearings.

[0014] Furthermore, the connecting shaft assembly includes a pin and a sleeve sleeved on a middle section of the pin, and the external thread section is located on the pin.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1. Compared with the traditional spherical tool, the nano-reinforced tool in the embodiment of the present application has a reinforcing head arranged circumferentially on the rim of the tool body, so that the processed nano-layer is deeper, the surface nano-processing accuracy is higher, and it is not easy to generate heat.

[0017] 2. Since the smaller the cross-sectional diameter of the strengthening head, the greater the pressure on the surface of the workpiece, the better the nano-strengthening effect, therefore, the nano-strengthening tool in the embodiment of the present application forms a deeper gradient nano layer on the metal surface by making the maximum value D of the rim of the tool body ≤20mm and the cross-sectional diameter d of the strengthening head ≤6mm.

[0018] 3. The nano-enhanced prop of the embodiment of the present application is provided with two bearings between the two ends of the inner hole of the tool body and the connecting shaft assembly, and the bearings are axially limited by nuts, so that the tool body has both structural stability and high precision under high-speed rotation.

[0019] 4. The nano-reinforcement tool in the embodiment of the present application improves processing efficiency by providing reinforcing heads arranged in sequence along the axial direction on the tool body.

[0020] 5. The tool body in the nano-enhanced tool of the embodiment of the present application can be replaced with a hard-enhanced tool head for local fine processing according to the characteristics and shape of the processed area, which further increases the scope of application and practicality of the device and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the structure of Example 1 of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of the tool body in Example 1 of the present application;

[0024] Figure 3 It is a schematic diagram of the maximum value of the wheel rim of the tool body and the cross-sectional diameter of the strengthening head in Example 1 of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of the tool body in Example 2 of the present application;

[0026] Figure 5 A schematic diagram of the maximum value of the rim of the tool body and the cross-sectional diameter of the strengthening head in Example 2 of the present application;

[0027] Figure 6 This is a structural diagram of Example 3 of the present application. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, they can understand the specific meanings of the above terms in this application according to specific circumstances.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] Embodiment 1:

[0033] Reference Figures 1 to 3 An embodiment of the present application provides a nano-enhanced tool, including a tool support 1 and a tool body 2.

[0034] The tool support 1 is a U-shaped support with two free ends, and the upper end of the tool support 1 is connected to the vertical machining center through a tool handle. The lower end of the tool support 1 is connected to the tool body 2 through a connecting shaft assembly, and the two are rotatably connected through a bearing. The lower end of the tool body 2 is in contact with the workpiece for rolling, so that the surface of the workpiece is locally plastically deformed to produce dislocation nano-refined grains. The surface of the workpiece can be a plane or a curved surface, and the material can be aluminum alloy, copper alloy, stainless steel, GCr15, bearing 4 steel or mold steel.

[0035] The tool body 2 is a wheel-type structure with a center hole, and a reinforcement head 3 is provided in the middle of the wheel rim. The reinforcement head 3 is a protrusion that surrounds the wheel rim in the circumferential direction and protrudes through a circular arc chamfer, that is, the reinforcement head 3 and the wheel rim are smoothly transitioned through a rounded corner. The cross-section of the reinforcement head 3 is a semicircle, and the diameter of the semicircle is d=6mm. The maximum diameter D of the wheel rim of the tool body 2 is 20mm. According to the characteristics and shape of the processed area, the tool body 2 can be replaced with a hard reinforcement cutter head for local fine processing, which further increases the scope of application and practicality of the device and saves costs.

[0036] Two bearing mounting holes are arranged at both end surfaces of the center hole, and bearings 4 are arranged in the bearing mounting holes. The outer ring of the bearing 4 is interference fit with the inner wall of the bearing mounting hole, and the inner ring is connected to the connecting shaft assembly.

[0037] For easy installation, the connecting shaft assembly includes a pin shaft 5 and a sleeve 6 sleeved on the middle section of the pin shaft 5. The pin shaft 5 is provided with an external thread section, and a nut 7 is connected to the external thread section, and the nut 7 can axially limit the two bearings 4. The two ends of the pin shaft 5 are connected to the two free ends of the tool support 1 by screws 8.

[0038] The nano-enhanced tool in the embodiment of the present application is used to process plate metal materials on a machining center. During processing, the workpiece is fixed on the chuck of the machining center, and the nano-enhanced tool is fixed on the tool holder. The nano-enhanced tool performs rolling processing on the surface of the workpiece.

[0039] Embodiment 2:

[0040] Reference Figure 4 and Figure 5 The only difference between Example 2 and Example 1 is that the strengthening head 3 is a protrusion that protrudes directly from the rim.

[0041] Embodiment 3:

[0042] Reference Figure 6 The only difference between Example 3 and Example 2 is that there are multiple reinforcing heads 3, and the multiple reinforcing heads 3 are arranged in sequence along the axial direction of the tool body 1. It should be noted that when the dimensions of the two ends of the tool body 1 are not sufficient to accommodate the semicircular reinforcing heads 3, the edges of the reinforcing heads 3 can be transitionally connected to the ends of the tool body 1 through a raised arc surface.

[0043] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A nano-enhanced cutting tool, characterized in that: It includes a tool bracket and a tool body; the tool bracket is a U-shaped bracket; the tool body is a wheel structure with a center hole, and a reinforcement head is provided on the rim of the tool body, and the reinforcement head is a protrusion surrounding the rim along the circumferential direction; the tool body is connected to the U-shaped bracket through a connecting shaft assembly; the tool body and the connecting shaft assembly are rotatably connected through a bearing.

2. The nano-enhanced cutting tool according to claim 1, characterized in that: The cross section of the strengthening head is a semicircle; the diameter d of the semicircle is ≤6mm; the maximum diameter D of the rim of the tool body is ≤20mm.

3. The nano-enhanced cutting tool according to claim 2, characterized in that: The wheel rim of the tool body is a cylindrical surface.

4. The nano-enhanced cutting tool according to claim 3, characterized in that: The reinforcing head protrudes directly from the wheel rim.

5. The nano-enhanced cutting tool according to claim 3, characterized in that: The reinforcing head protrudes from the wheel rim through a circular arc chamfer.

6. The nano-enhanced cutting tool according to claim 4, characterized in that: There is one strengthening head, which is arranged in the middle of the wheel rim of the tool body.

7. The nano-enhanced cutting tool according to claim 4, characterized in that: There are a plurality of strengthening heads, and the plurality of strengthening heads are arranged in sequence along the axial direction of the tool body.

8. The nano-enhanced cutting tool according to claim 6 or 7, characterized in that: Two bearing mounting holes are arranged in the tool body, and bearings are arranged in the bearing mounting holes; the outer ring of the bearing is connected to the tool body, and the inner ring is connected to the connecting shaft assembly.

9. The nano-enhanced cutting tool according to claim 8, characterized in that: The two ends of the connecting shaft assembly are connected to the tool support by screws; the connecting shaft assembly is provided with an external thread section, and a nut is connected to the external thread section, and the nut can axially limit the two bearings.

10. The nano-enhanced cutting tool according to claim 9, characterized in that: The connecting shaft assembly comprises a pin shaft and a sleeve sleeved on the middle section of the pin shaft, and the external thread section is located on the pin shaft.

Images