High strength diamond composite tool bit

Abstract

The application provides a high-strength diamond composite tool bit, which comprises a tool handle, a tool head assembly arranged on the tool handle, a positioning assembly and a fixing assembly arranged between the tool handle and the tool head assembly, the tool head assembly comprises a seat body, a chip removal seat arranged on the seat body and a tool head arranged on the chip removal seat, the tool head comprises a tool core arranged on the chip removal seat, a diamond layer group and a wear-resistant layer which are arranged on the outer periphery of the tool core from the inside to the outside. The positioning assembly and the fixing assembly are matched, so that the assembly structure and process are effectively simplified, the operation difficulty is reduced, the assembly time is shortened, the tool head assembly is convenient to disassemble and replace, the labor time consumption is reduced, the machining interruption is avoided, the production flexibility is improved. Meanwhile, the diamond layer group is combined with the wear-resistant layer, the wear resistance of the tool head is enhanced, the service life is prolonged, the replacement frequency is reduced to reduce the cost, the uneven wear is avoided, the machining precision is ensured, the high-precision machining demand is met, and the application has the advantages of reasonable structure, strong practicability, convenience for popularization and implementation.

Description

Technical Field

[0001] This application belongs to the field of cutting tool processing technology, specifically relating to a high-strength diamond composite cutting tool. Background Technology

[0002] In existing technologies, high-strength diamond composite cutting tools play a crucial role in the machining of ultrahard objects. Leveraging the superior hardness of diamond, they can efficiently cut ultrahard materials such as stone, ceramics, and cemented carbide, significantly improving machining accuracy and efficiency. This meets the core demands for high-quality machining in industries such as construction decoration and precision manufacturing, providing key technical support for the production and operation of related industries. However, current diamond composite cutting tools on the market still have some shortcomings in structural design and performance.

[0003] In existing technologies, the assembly structure of traditional diamond composite tool tips is complex, typically requiring multiple specialized tools and cumbersome procedures to connect and fix them to the tool body. This not only increases the workload for operators but also prolongs assembly time, severely impacting overall production efficiency. Furthermore, when facing the machining requirements of workpieces with different specifications and precision, corresponding tool tips need to be replaced. However, the disassembly and replacement process of existing tool tips is equally inconvenient, often consuming significant manpower and time, leading to interruptions in the machining process and further reducing production flexibility and adaptability.

[0004] Furthermore, existing diamond composite cutting tools suffer from short service life and poor wear resistance. During long-term machining of ultrahard objects, the tool surface is prone to severe wear, leading to a rapid decline in cutting performance. This not only necessitates frequent tool replacements, increasing machining costs, but also may affect workpiece machining accuracy due to uneven tool wear, resulting in excessive machining errors. Consequently, these tools cannot meet the long-term usage requirements of high-precision machining scenarios.

[0005] Therefore, in order to comprehensively improve the ease of assembly, flexibility of replacement, service life and wear resistance of diamond composite cutting tools, reduce processing costs, and improve processing accuracy and production efficiency, it is now urgent to improve the existing diamond composite cutting tools to better meet the actual application needs in the field of ultrahard object processing. Utility Model Content

[0006] This application aims to address the technical problems in the prior art, such as the complex assembly structure and cumbersome procedures of high-strength diamond composite cutting heads, which increase the difficulty of operation and prolong the time; the inconvenience of disassembly and replacement, which consumes manpower and time and causes processing interruption; and the short life, poor wear resistance, easy wear, which leads to a decrease in cutting performance, increased cost and affected processing accuracy. Therefore, this application proposes a high-strength diamond composite cutting head.

[0007] This application adopts the following solution: a high-strength diamond composite tool tip, including a tool holder, a tool tip assembly disposed on the tool holder, a positioning assembly disposed between the tool holder and the tool tip assembly, and a fixing assembly disposed between the tool holder and the tool tip assembly. The tool tip assembly includes a base, a chip removal seat disposed on the base, and a tool tip disposed on the chip removal seat. The tool tip includes a core disposed on the chip removal seat, and a diamond layer group and a wear-resistant layer sequentially covering the outer periphery of the core from the inside to the outside.

[0008] In some feasible embodiments, the diamond layer group includes an inner diamond layer and an outer diamond layer that are sequentially wrapped around the outer periphery of the cutting core from the inside out, wherein the thickness of the inner diamond layer is greater than the thickness of the outer diamond layer.

[0009] In some feasible embodiments, the particle size of the inner diamond layer is defined as A, and the particle size of the outer diamond layer is defined as B. A and B satisfy the following relationship: 120 mesh ≤ A ≤ 150 mesh, 60 mesh ≤ B ≤ 80 mesh.

[0010] In some feasible embodiments, the wear-resistant layer is made of tungsten carbide or silicon nitride.

[0011] In some feasible embodiments, the positioning component includes a mounting hole on the tool holder, a first positioning groove at the bottom of the mounting hole, and a positioning post on the base. When the base is inserted into the mounting hole, the positioning post is inserted into the first positioning groove.

[0012] In some feasible embodiments, the positioning component further includes a second positioning groove disposed at the bottom of the first positioning groove, and a positioning block disposed on the positioning post. The first positioning groove has a circular cross-sectional shape, and the second positioning groove has a rectangular cross-sectional shape. When the positioning post is inserted into the first positioning groove, the positioning block is inserted into the second positioning groove.

[0013] In some feasible embodiments, the fixing component includes a group of fixing holes disposed on the left and right sides of the base and between the tool holder, a fixing pin passing through the group of fixing holes, and fasteners disposed at both ends of the fixing pin.

[0014] In some feasible embodiments, the fixing hole group is provided with multiple holes spaced apart along the height direction of the seat.

[0015] In some feasible embodiments, the fixing component further includes a buffer layer attached to the front and rear sides of the seat, the buffer layer being made of rubber.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] This application provides a high-strength diamond composite tool tip, comprising a tool holder, a tool tip assembly mounted on the tool holder, a positioning component and a fixing component disposed between the tool holder and the tool tip assembly. The tool tip assembly includes a base, a chip conveyor mounted on the base, and a tool tip mounted on the chip conveyor. The tool tip includes a core mounted on the chip conveyor, a diamond layer assembly covering the outer periphery of the core from the inside out, and a wear-resistant layer. This application, through the cooperation of the positioning component and the fixing component, effectively simplifies the assembly structure and process, reduces operational difficulty, and shortens assembly time; it also facilitates the disassembly and replacement of the tool tip assembly, reducing manpower and time consumption, avoiding processing interruptions, and improving production flexibility. Simultaneously, the diamond layer assembly combined with the wear-resistant layer enhances the wear resistance of the tool tip, extends its service life, reduces replacement frequency to lower costs, and also avoids uneven wear, ensuring machining accuracy and meeting the needs of high-precision machining. It has the advantages of reasonable structure, strong practicality, and ease of promotion and implementation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-strength diamond composite tool tip according to this application;

[0019] Figure 2 This is a top view of a high-strength diamond composite tool tip according to this application;

[0020] Figure 3 This application Figure 2 Sectional view at point AA;

[0021] Figure 4 This application Figure 3 A magnified view of a section at point B in the middle;

[0022] Figure 5 This application Figure 3 A magnified view of a section at point C;

[0023] Figure 6 This application Figure 3 A magnified view of a section at point D;

[0024] Figure 7 This is an exploded structural diagram of a high-strength diamond composite tool tip according to this application. Detailed Implementation

[0025] Combination Figures 1 to 7The following content further illustrates the technical solution proposed in this application. This application adopts the following technical solution: a high-strength diamond composite cutting tool, comprising a tool holder 1, a cutting tool assembly 2 disposed on the tool holder 1, a positioning assembly 3 disposed between the tool holder 1 and the cutting tool assembly 2, and a fixing assembly 4 disposed between the tool holder 1 and the cutting tool assembly 2. The cutting tool assembly 2 includes a base 20, a chip removal seat 21 disposed on the base 20, and a cutting tool 22 disposed on the chip removal seat 21. The cutting tool includes a cutting core 220 disposed on the chip removal seat 21, and a diamond layer group 221 and a wear-resistant layer 222 sequentially covering the outer periphery of the cutting core 220 from the inside out.

[0026] This application provides a high-strength diamond composite tool tip, comprising a tool holder, a tool tip assembly mounted on the tool holder, a positioning component and a fixing component disposed between the tool holder and the tool tip assembly. The tool tip assembly includes a base, a chip conveyor mounted on the base, and a tool tip mounted on the chip conveyor. The tool tip includes a core mounted on the chip conveyor, a diamond layer assembly covering the outer periphery of the core from the inside out, and a wear-resistant layer. This application, through the cooperation of the positioning component and the fixing component, effectively simplifies the assembly structure and process, reduces operational difficulty, and shortens assembly time; it also facilitates the disassembly and replacement of the tool tip assembly, reducing manpower and time consumption, avoiding processing interruptions, and improving production flexibility. Simultaneously, the diamond layer assembly combined with the wear-resistant layer enhances the wear resistance of the tool tip, extends its service life, reduces replacement frequency to lower costs, and also avoids uneven wear, ensuring machining accuracy and meeting the needs of high-precision machining. It has the advantages of reasonable structure, strong practicality, and ease of promotion and implementation.

[0027] In actual implementation, during assembly, the positioning component is first used to achieve precise alignment between the tool holder and the tool head assembly, avoiding assembly deviations; then, the fixing component is used to secure them together, eliminating the need for multiple specialized tools and simplifying the traditionally complex assembly process. When machining ultrahard workpieces, the diamond layer of the tool head serves as the primary cutting layer, directly acting on the workpiece surface with its high hardness to achieve efficient cutting; the outer wear-resistant layer reduces direct wear on the tool head surface during machining, while the chip evacuation seat promptly guides the chips generated during cutting, preventing chip accumulation from affecting cutting accuracy; the core provides structural support for the diamond layer and wear-resistant layer, ensuring the overall stability of the tool head under stress. When it is necessary to adapt to different workpiece specifications or when the tool head needs to be replaced due to wear, only the fixing component needs to be disassembled, the old tool head assembly removed, and the new tool head assembly quickly positioned and installed using the positioning component. The fixing component is then retightened to complete the replacement, without requiring any overall adjustment of the tool holder.

[0028] In this embodiment, the diamond layer group 221 includes an inner diamond layer 223 and an outer diamond layer 224 that are sequentially wrapped around the outer periphery of the blade core 220 from the inside to the outside, and the thickness of the inner diamond layer 223 is greater than the thickness of the outer diamond layer 224.

[0029] In this embodiment, the particle size of the inner diamond layer 223 is defined as A, and the particle size of the outer diamond layer 224 is defined as B. The following relationship is satisfied between A and B: 120 mesh ≤ A ≤ 150 mesh, 60 mesh ≤ B ≤ 80 mesh.

[0030] In this embodiment, the wear-resistant layer 222 is made of tungsten carbide or silicon nitride.

[0031] In practical applications, when machining ultrahard workpieces, the outer diamond layer serves as the primary cutting layer. Its coarser particle size enhances cutting impact, rapidly breaking down the hardened surface layer and improving cutting efficiency. The inner diamond layer, as the secondary cutting layer, uses finer particles to refine the workpiece surface, reducing cutting marks and improving surface finish. Furthermore, the inner diamond layer's greater thickness provides stable support for the outer layer and maintains cutting performance even after wear, extending the tool's effective cutting cycle. A wear-resistant tungsten carbide layer coats the outer periphery of the diamond layer assembly. Tungsten carbide's high hardness and wear resistance prevent direct scraping of the diamond layer by workpiece debris during machining, reducing diamond particle shedding. Simultaneously, the excellent high-temperature resistance of both tungsten carbide and silicon nitride isolates the diamond layer assembly from thermal damage caused by localized high temperatures during cutting, preventing a decrease in hardness due to high-temperature graphitization.

[0032] In this embodiment, the positioning component 3 includes a mounting hole 30 on the tool holder 1, a first positioning groove 31 at the bottom of the mounting hole 30, and a positioning post 32 on the seat 20. When the seat 20 is inserted into the mounting hole 30, the positioning post 32 is inserted into the first positioning groove 31.

[0033] In this embodiment, the positioning component 3 further includes a second positioning groove 33 disposed at the bottom of the first positioning groove 31, and a positioning block 34 disposed on the positioning post 32. The cross-sectional shape of the first positioning groove 31 is circular, and the cross-sectional shape of the second positioning groove 33 is rectangular. When the positioning post 32 is inserted into the first positioning groove 31, the positioning block 34 is inserted into the second positioning groove 33.

[0034] In actual implementation, during assembly, the base of the tool head assembly is first aligned with the mounting hole on the tool holder, extending the base along the axis of the mounting hole. Simultaneously, the locating pin on the base inserts into the first locating groove at the bottom of the mounting hole. The circular cross-section of the first locating groove and the locating pin form a radial constraint, quickly correcting the coaxiality of the base and the tool holder, preventing radial misalignment, and completing the initial positioning. As the base continues to extend into the mounting hole, the locating block on the locating pin simultaneously inserts into the second locating groove at the bottom of the first locating groove. The asymmetrical rectangular cross-section restricts the circumferential rotation of the locating pin, thereby fixing the relative circumferential position of the base and the tool holder, preventing circumferential misalignment of the tool head assembly due to vibration during machining.

[0035] In this embodiment, the fixing component 4 includes a fixing hole group 40 disposed between the left and right sides of the base body 20 and the handle 1, a fixing pin 41 passing through the fixing hole group 40, and fasteners 42 disposed at both ends of the fixing pin 41.

[0036] In this embodiment, the fixing hole group 40 is provided with a plurality of holes spaced apart along the height direction of the base 20.

[0037] In this embodiment, the fixing component 4 further includes a buffer layer, which is attached to the front and rear sides of the seat 20, and the material of the buffer layer is rubber.

[0038] In actual implementation, after the base body is aligned with the tool holder via the positioning components, the corresponding fixing hole groups on the left and right sides of the tool holder and base body are selected according to the actual height and force requirements of the tool head assembly. The fixing pins are then inserted into these selected fixing hole groups to form lateral constraints in the left and right directions. Fasteners (such as nuts) are then installed at both ends of the fixing pins, and the preload of the fasteners locks the fixing pins in place, ensuring a tight fit between the tool holder and the left and right sides of the base body, preventing relative lateral displacement. The design of multiple fixing hole groups allows for flexible selection of the number of fastening points based on the cutting force of the tool head (e.g., 3-4 groups for heavy-duty cutting, 1-2 groups for light-duty cutting), ensuring that the fastening strength matches the force on the tool head. The rubber buffer layers attached to the front and rear sides of the base body are slightly compressed after the tool holder and base body are assembled, forming elastic support. During the machining process, the cutting vibration experienced by the cutter head is transmitted to the buffer layer through the base. The high elasticity of the rubber material can absorb the vibration energy, preventing the vibration from being directly transmitted to the fixing components (fixing pins, fixing hole groups), while reducing the friction and wear between the base and the tool holder caused by vibration, ensuring the long-term stability of the fixing structure.

[0039] This application provides a high-strength diamond composite tool tip, comprising a tool holder, a tool tip assembly mounted on the tool holder, a positioning component and a fixing component disposed between the tool holder and the tool tip assembly. The tool tip assembly includes a base, a chip conveyor mounted on the base, and a tool tip mounted on the chip conveyor. The tool tip includes a core mounted on the chip conveyor, a diamond layer assembly covering the outer periphery of the core from the inside out, and a wear-resistant layer. This application, through the cooperation of the positioning component and the fixing component, effectively simplifies the assembly structure and process, reduces operational difficulty, and shortens assembly time; it also facilitates the disassembly and replacement of the tool tip assembly, reducing manpower and time consumption, avoiding processing interruptions, and improving production flexibility. Simultaneously, the diamond layer assembly combined with the wear-resistant layer enhances the wear resistance of the tool tip, extends its service life, reduces replacement frequency to lower costs, and also avoids uneven wear, ensuring machining accuracy and meeting the needs of high-precision machining. It has the advantages of reasonable structure, strong practicality, and ease of promotion and implementation.

[0040] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A high-strength diamond composite cutting tip, characterized in that, The tool includes a handle (1), a cutting head assembly (2) disposed on the handle (1), a positioning assembly (3) disposed between the handle (1) and the cutting head assembly (2), and a fixing assembly (4) disposed between the handle (1) and the cutting head assembly (2). The cutting head assembly (2) includes a base (20), a chip removal seat (21) disposed on the base (20), and a cutting head (22) disposed on the chip removal seat (21). The cutting head includes a cutting core (220) disposed on the chip removal seat (21), a diamond layer group (221) and a wear-resistant layer (222) sequentially covering the outer periphery of the cutting core (220) from the inside to the outside.

2. The high-strength diamond composite tool tip according to claim 1, characterized in that, The diamond layer group (221) includes an inner diamond layer (223) and an outer diamond layer (224) that are sequentially wrapped around the outer periphery of the blade core (220) from the inside to the outside. The thickness of the inner diamond layer (223) is greater than the thickness of the outer diamond layer (224).

3. The high-strength diamond composite tool tip according to claim 2, characterized in that, The particle size of the inner diamond layer (223) is defined as A, and the particle size of the outer diamond layer (224) is defined as B. A and B satisfy the following relationship: 120 mesh ≤ A ≤ 150 mesh, 60 mesh ≤ B ≤ 80 mesh.

4. A high-strength diamond composite tool tip according to claim 1, characterized in that, The wear-resistant layer (222) is made of tungsten carbide or silicon nitride.

5. A high-strength diamond composite tool tip according to claim 1, characterized in that, The positioning component (3) includes a mounting hole (30) on the tool holder (1), a first positioning groove (31) at the bottom of the mounting hole (30), and a positioning post (32) on the seat (20). When the seat (20) is inserted into the mounting hole (30), the positioning post (32) is inserted into the first positioning groove (31).

6. A high-strength diamond composite tool tip according to claim 5, characterized in that, The positioning component (3) further includes a second positioning groove (33) located at the bottom of the first positioning groove (31) and a positioning block (34) located on the positioning post (32). The first positioning groove (31) has a circular cross-sectional shape, and the second positioning groove (33) has a rectangular cross-sectional shape. When the positioning post (32) is inserted into the first positioning groove (31), the positioning block (34) is inserted into the second positioning groove (33).

7. A high-strength diamond composite tool tip according to claim 1, characterized in that, The fixing component (4) includes a fixing hole group (40) located between the left and right sides of the base (20) and the handle (1), a fixing pin (41) passing through the fixing hole group (40), and fasteners (42) located at both ends of the fixing pin (41).

8. A high-strength diamond composite cutting tip according to claim 7, characterized in that, The fixing hole group (40) is provided in multiple intervals along the height direction of the seat (20).

9. A high-strength diamond composite tool tip according to claim 7, characterized in that, The fixing component (4) also includes a buffer layer, which is attached to the front and rear sides of the seat (20), and the material of the buffer layer is rubber.

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