CVD diamond coated tools for metal cutting

Abstract

The application discloses a CVD diamond coating cutter for metal cutting, which comprises a cutting head fixedly installed at the end of a cutter part, a clamping part for fixing the cutting head, a thread connection between the outer wall of the cutting head and the inner wall of the clamping part, position adjustment of the cutter part driven by the cutting head through the thread connection, a steel supporting part fixedly installed inside the cutter part, a chip groove arranged on the outer wall of the cutter part, and a detachable additional part installed on the outer wall of the cutter part. The CVD diamond coating cutter for metal cutting is characterized in that the thread connection between the cutting head and the clamping part enables the cutting head to drive the cutter part to adjust the position, so that the cutter part is lengthened, and the steel supporting part can effectively increase the supporting strength of the cutter part. When deep hole cutting of metal materials is performed, the steel supporting part can support the cutter part, so that the cutter part is prevented from being broken when cutting deep holes.

Description

Technical Field

[0001] This invention relates to the field of coated cutting tool technology, specifically to a CVD diamond-coated cutting tool for metal cutting. Background Technology

[0002] Diamond-coated cutting tools are high-performance cutting tools prepared using chemical vapor deposition (CVD) technology. These tools combine the high hardness and wear resistance of diamond with the strength and toughness of the base material (such as cemented carbide) by coating a thin, uniform diamond film onto the tool substrate. This significantly improves the cutting performance and service life of the tool. The preparation process of CVD diamond-coated cutting tools mainly involves chemical vapor deposition technology. In this process, gaseous carbon sources (such as methane) and hydrogen are introduced into a high-temperature, low-pressure reaction chamber, where a diamond film is deposited on the surface of the tool substrate through a chemical reaction. This film has extremely high hardness and wear resistance, effectively resisting wear and breakage during the cutting process.

[0003] In the process of cutting metal materials, holes are often drilled according to process requirements, and the generated chips are discharged along the chip removal groove. Due to the difference in hole depth, the length of the coated tool often needs to be changed during the cutting process. The existing replacement method is mostly to replace the relatively long coated tool. When machining metal materials with high difficulty or large workload, the operator may need to change the coated tool multiple times. Moreover, when changing the tool, the operator first needs to determine the machining depth of the hole, and then take out the corresponding coated tool from the warehouse and install it on the tool holder. The operation is cumbersome and reduces the efficiency of metal cutting. To address this, we propose a CVD diamond coated tool for metal cutting. Summary of the Invention

[0004] The purpose of this invention is to provide a CVD diamond-coated cutting tool for metal cutting, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CVD diamond-coated cutting tool for metal cutting, comprising a cutting head fixedly mounted on the end of the tool portion, and a clamping portion for fixing the cutting head, wherein the outer wall of the cutting head and the inner wall of the clamping portion are connected by threads, the cutting head driving the tool portion to adjust its position through the threaded connection, and a rigid support portion fixedly mounted inside the tool portion, wherein the outer wall of the tool portion is provided with a chip discharge groove for discharging metal chips, and a detachable mounting portion is installed on the outer wall of the tool portion.

[0006] Preferably, the chip removal groove on the mounting part and the cutting tool part form a complete chip removal area for short hole cutting of metal materials.

[0007] Preferably, the surface of the mounting part has a break point area for deep hole cutting of metal materials, and the break point area, together with the chip removal groove, is used to cut spiral metal chips.

[0008] Preferably, the cutting head is fixedly installed with cushioning rubber above and below the thread, and the cushioning rubber fits tightly with the clamping part, which is an interference fit.

[0009] Preferably, the inner wall of the clamping part is provided with two inclined areas, and the buffer rubber is squeezed when it moves to the inclined area.

[0010] Preferably, a rubber bellows is installed on the top of the clamping part and is rotatably connected to its inner wall, and the rubber bellows is connected to the cutting fluid pipeline. One end of the rigid support part passes through the cutting head and extends to the outside, wherein the rubber bellows and the rigid support part can be fixedly connected by bolts.

[0011] Preferably, a magnetic plate frame is fixedly installed on the top of the cutting head, and an installation sleeve rotatably connected to it is installed on the inner wall of the top of the clamping part. A movable rod frame slidably connected to its inner wall is installed inside the installation sleeve. The end of the movable rod frame penetrates the bottom inner wall of the installation sleeve and extends to the outside. A magnetic frame is fixedly installed at the end of the movable rod frame located outside the installation sleeve. The magnetic plate frame generates an attractive force on the magnetic frame that is attached to it. A constant force spring is connected between the end of the movable rod frame located inside the installation sleeve and the inner wall of the installation sleeve.

[0012] Preferably, a spring sheet is installed inside the magnetic frame. When the magnetic frame is attached to the magnetic plate, the spring sheet contacts the magnetic plate, and an electrical component is fixedly installed inside the magnetic frame. The electrical component is located on the vibration trajectory of the spring sheet.

[0013] Preferably, the tool section has multiple output areas inside, one end of each output area is connected to the interior of the rigid support section, and the other end of the output area is connected to the chip removal groove; wherein a cooling area is provided at the bottom of the tool section, and the cooling area is connected to the end of the rigid support section.

[0014] Preferably, both the output area and the cooling area consist of a liquid inlet, a storage port, and an anti-backflow port.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention enables the cutting head to adjust the position of the tool by connecting the cutting head and the clamping part with a thread, thereby increasing the length of the tool. The rigid support part can effectively increase the support strength of the tool. When cutting deep holes in metal materials, the rigid support part can support the tool and prevent the tool from breaking when cutting deep holes.

[0017] This invention, through a detachable mounting part, allows the spiral metal scrap to pass through the chip discharge groove. As the cutting tool rotates at high speed, the spiral metal scrap enters the break point area. Under the squeezing action of the inner wall of the chip discharge groove, the spiral metal scrap is cut off, while shorter metal scrap is prevented from clogging in the chip discharge groove. This effectively prevents the cutting tool from chipping or breaking.

[0018] The present invention can effectively absorb the vibration force through the buffer rubber, and the deformed buffer rubber is in close contact with the inclined area. At this time, the vibration force generated during the cutting process will be effectively absorbed by the buffer rubber, reducing the impact of the vibration force on the threaded connection between the cutting head and the clamping part.

[0019] This invention utilizes a spring sheet to absorb the vibration force of the cutting head. The spring sheet amplifies the vibration force, meaning that the spring sheet vibrates accordingly. If the vibration intensity is large, the spring sheet will come into contact with electrical components during the vibration process. The electrical components are connected to the central control equipment in the plant, which can notify the staff to carry out maintenance, thereby avoiding the situation of tool breakage during metal cutting. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the clamping part of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the mounting part of the present invention;

[0023] Figure 4 This is a schematic diagram of the clamping part and cutting head structure of the present invention;

[0024] Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the structure of region A in the middle;

[0025] Figure 6 This is a schematic diagram of the structure at the mounting sleeve of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the cutting tool section of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure of region B in the middle;

[0028] Figure 9 For the present invention Figure 7 Enlarged schematic diagram of the structure of region C in the middle.

[0029] In the diagram: 1-Tool section; 101-Output area; 102-Cooling area; 103-Inlet; 104-Storage port; 105-Anti-backflow port; 2-Cutting head; 21-Magnetic plate holder; 22-Buffer rubber; 3-Clamping part; 31-Inclined area; 32-Rubber bellows; 33-Mounting sleeve; 34-Moving rod holder; 35-Magnetic frame; 36-Constant force spring; 37-Spring plate; 38-Electrical component; 4-Rigid support part; 5-Chip removal groove; 6-Addition part; 61-Breakpoint area. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9 This invention provides a technical solution: a CVD diamond-coated cutting tool for metal cutting. This invention addresses the technical problems in the prior art by making corresponding improvements, including a cutting head 2 fixedly mounted on the end of the tool section 1, and a clamping part 3 for fixing the cutting head 2. The outer wall of the cutting head 2 and the inner wall of the clamping part 3 are connected by threads, thereby allowing the cutting head 2 to drive the tool section 1 to adjust its position. Therefore, when deep hole cutting of metal materials is required, the operator only needs to rotate downwards (see attached diagram). Figure 2 As shown), the cutting head 2 is positioned within the clamping part 3, thereby increasing the length of the tool part 1. It should be noted that, in order to ensure the stability of the tool part 1 during cutting, the maximum descent distance of the cutting head 2 within the clamping part 3 is one-third of the entire threaded connection area. A rigid support part 4 is fixedly installed inside the tool part 1. The outer wall of the tool part 1 is provided with a chip discharge groove 5 for discharging metal chips, and a detachable mounting part 6 is installed on the outer wall of the tool part 1. Since the surface of the tool part 1 is provided with a chip discharge groove 5, the strength of the tool part 1 decreases during the cutting of deep holes when the length of the tool part 1 increases. Therefore, the present invention can effectively increase the support strength of the tool part 1 through the rigid support part 4. When performing deep hole cutting on metal materials, the rigid support part 4 can support the tool part 1 and prevent the tool part 1 from breaking during deep hole cutting.

[0032] As a further limitation of the present invention, the mounting part 6 is detachable and can be modified accordingly based on the depth of the metal hole being cut, in conjunction with the attached... Figure 2 and attached Figure 3 As shown in the attached figure, when cutting short holes in metallic materials, the following method can be used. Figure 2The mounting part 6 shown forms a complete chip removal area with the chip removal groove 5 on the tool part 1. It is used for short hole cutting of metal materials. The spiral metal chips generated during cutting will flow out of the hole along the chip removal groove 5.

[0033] When performing deep hole cutting on metal materials, the spiral-shaped metal chips are prone to clogging the deep hole due to their excessive length during discharge. This can affect cutting accuracy and easily cause chipping or breakage of the tool section 1. Therefore, the corresponding mounting part 6 can be replaced, in conjunction with the attached... Figure 3 As shown, the surface of the mounting part 6 is provided with a break point area 61 for deep hole cutting of metal materials. The break point area 61, together with the chip removal groove 5, is used to cut spiral metal chips. When the spiral metal chips pass through the chip removal groove 5, the cutting tool 1 is in a high-speed rotating state, and the spiral metal chips will enter the break point area 61. Under the squeezing action of the inner wall of the chip removal groove 5, the spiral metal chips are cut off, while the shorter metal chips are prevented from clogging in the chip removal groove 5, thereby effectively preventing the cutting tool 1 from chipping or breaking.

[0034] Furthermore, in practical applications, when the cutting head 2 is positioned within the clamping part 3, the deep hole cutting operation of the tool part 1 will generate corresponding vibration force, which is transmitted to the threaded connection between the cutting head 2 and the clamping part 3. After prolonged use, the vibration force will affect the connection strength between the cutting head 2 and the clamping part 3. Based on this, the present invention is designed as follows: the cutting head 2 is fixedly installed with buffer rubber 22 above and below the thread. The buffer rubber 22 is tightly fitted with the clamping part 3, which is an interference fit. The inner wall of the clamping part 3 is provided with two inclined areas 31. When the buffer rubber 22 moves to the inclined area 31, it is squeezed. During the assembly process, when the cutting head 2 enters the clamping part 3 through the threaded connection, the buffer rubber 22 will pass through the inclined area 31. At this time, the operator needs to increase the force so that the buffer rubber 22 is deformed by the force. After deformation, the buffer rubber 22 is in close contact with the inclined area 31. At this time, the vibration force generated during the cutting process will be effectively absorbed by the buffer rubber 22, reducing the impact of the vibration force on the threaded connection between the cutting head 2 and the clamping part 3.

[0035] However, as time goes on, the vibration force may still affect the connection strength between the cutting head 2 and the clamping part 3. Therefore, this invention has a magnetic plate frame 21 fixedly installed on the top of the cutting head 2, and a mounting sleeve 33 rotatably connected to the top inner wall of the clamping part 3. A movable rod 34 slidably connected to the inner wall of the mounting sleeve 33 is installed inside the mounting sleeve 33, wherein the end of the movable rod 34 penetrates the bottom inner wall of the mounting sleeve 33 and extends to the outside, and the movable rod 34 is located outside the mounting sleeve 33. A magnetic frame 35 is fixedly installed at one end. The magnetic plate 21 exerts an attractive force on the magnetic frame 35 that is attached to it. A constant force spring 36 is connected between one end of the movable rod 34 located inside the mounting sleeve 33 and the inner wall of the mounting sleeve 33. A spring plate 37 is installed inside the magnetic frame 35. When the magnetic frame 35 is attached to the magnetic plate 21, the spring plate 37 contacts the magnetic plate 21. An electrical component 38 is fixedly installed inside the magnetic frame 35. The electrical component 38 is located on the vibration trajectory of the spring plate 37.

[0036] As described above, when the cutting head 2 enters the clamping part 3 through the threaded connection, the magnetic plate holder 21 is in contact with the surface of the magnetic frame 35. When the cutting head 2 is adjusted, the magnetic frame 35 will descend synchronously under the attraction of the magnetic plate holder 21. During the descent, the moving rod 34 compresses the constant force spring 36 inside the mounting sleeve 33, and the spring plate 37 descends synchronously with the magnetic frame 35. It should be noted that when the magnetic frame 35 is in contact with the magnetic plate holder 21, the spring plate 37 will contact the magnetic plate holder 21. Therefore, when the tool part 1 performs deep hole cutting, if the tool part 1 experiences a certain vibration force, the cutting head 2 will transmit the vibration force to the spring plate 37, and the spring plate 37 will amplify the vibration force. That is, the spring plate 37 vibrates accordingly. If the vibration intensity is large, the spring plate 37 will come into contact with the electrical component 38 during the vibration. The electrical component 38 is connected to the central control equipment of the factory. The central control equipment can notify the staff to carry out maintenance, thereby avoiding the situation of tool part 1 breaking during metal cutting. To further explain, when the cutting head 2 is fully inserted into the clamping part 3 through the threaded connection, the magnetic plate frame 21 and the magnetic frame 35 are tightly attached. During the position adjustment of the cutting head 2 in the clamping part 3, since the magnetic plate frame 21 is in contact with the magnetic frame 35 and the magnetic plate frame 21 has a certain attraction to the magnetic frame 35, the magnetic frame 35 moves synchronously with the magnetic plate frame 21 during the position adjustment of the cutting head 2, and drives the mounting sleeve 33 to move synchronously.

[0037] During deep hole cutting, the cutting fluid has difficulty entering the deep hole to cool the tool section 1, and the cutting fluid on the surface of the chip removal groove 5 is also relatively scarce. Consequently, the generated metal chips become clogged in the chip removal groove 5 due to insufficient cutting fluid lubrication. To address this issue, the present invention incorporates the following design: First, a rubber bellows 32 is rotatably connected to the inner wall of the clamping part 3. The rubber bellows 32 is a cylindrical thin-walled corrugated shell with multiple transverse corrugations, and it is connected to the cutting fluid pipeline. One end of the rigid support part 4 penetrates the cutting head. Part 2 extends to the outside, wherein the rubber corrugated pipe 32 and the rigid support part 4 can be fixedly connected by bolts, and multiple output areas 101 are provided inside the tool part 1, one end of each output area 101 is connected to the inside of the rigid support part 4, and the other end of the output area 101 is connected to the chip removal groove 5; wherein a cooling area 102 is provided at the bottom of the tool part 1, and the cooling area 102 is connected to the end of the rigid support part 4, wherein the output area 101 and the cooling area 102 in this invention are both composed of a liquid inlet 103, a storage port 104 and an anti-backflow port 105;

[0038] Combined with appendix Figure 7-9 As shown, the cutting fluid enters the interior of the rigid support part 4 through the rubber bellows 32, and then enters the output area 101 and the cooling area 102 along the trajectory of the inner wall of the rigid support part 4. The cooling area 102 at the bottom of the tool part 1 will deliver the cutting fluid to the cutting point of the tool, thereby effectively removing the heat generated during the cutting process of the tool part 1 and providing lubrication. The cutting fluid through the output area 101 will enter the chip removal groove 5 to lubricate the metal chips in the chip removal groove 5, preventing the metal chips from clogging the chip removal groove 5 due to insufficient lubrication.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CVD diamond-coated cutting tool for metal cutting, characterized in that, The tool includes a cutting head (2) fixedly installed at the end of the tool section (1), and a clamping part (3) for fixing the cutting head (2). The outer wall of the cutting head (2) and the inner wall of the clamping part (3) are connected by threads. The cutting head (2) drives the tool section (1) to adjust its position through the threaded connection. A rigid support part (4) is fixedly installed inside the tool section (1). The outer wall of the tool section (1) is provided with a chip discharge groove (5) for discharging metal chips. A detachable mounting part (6) is installed on the outer wall of the tool section (1). The mounting part (6) and the chip removal groove (5) on the cutting tool part (1) form a complete chip removal area for short hole cutting of metal materials; the mounting part (6) has a break point area (61) on its surface for deep hole cutting of metal materials, and the break point area (61) cooperates with the chip removal groove (5) to cut spiral metal chips; the cutting head (2) has a buffer rubber (22) fixedly installed above and below the thread, and the buffer rubber (22) fits tightly with the clamping part (3) as an interference fit; the inner wall of the clamping part (3) has two inclined areas (31), and the buffer rubber (22) is squeezed when it moves to the inclined area (31); A magnetic plate frame (21) is fixedly installed on the top of the cutting head (2), and a mounting sleeve (33) rotatably connected to it is installed on the inner wall of the top of the clamping part (3). A movable rod frame (34) slidably connected to its inner wall is installed inside the mounting sleeve (33). The end of the movable rod frame (34) penetrates the bottom inner wall of the mounting sleeve (33) and extends to the outside. A magnetic frame (35) is fixedly installed at one end of the movable rod frame (34) outside the mounting sleeve (33). The magnetic plate frame (21) is attached to the magnetic... The frame (35) generates an attractive force. A constant force spring (36) is connected between the end of the movable rod (34) located inside the mounting sleeve (33) and the inner wall of the mounting sleeve (33). A spring plate (37) is installed inside the magnetic frame (35). When the magnetic frame (35) is in contact with the magnetic plate frame (21), the spring plate (37) contacts the magnetic plate frame (21). An electrical component (38) is fixedly installed inside the magnetic frame (35). The electrical component (38) is located on the vibration trajectory of the spring plate (37).

2. The CVD diamond-coated tool according to claim 1, characterized in that: The clamping part (3) is equipped with a rubber bellows (32) that is rotatably connected to its inner wall, and the rubber bellows (32) is connected to the cutting fluid pipeline. One end of the rigid support part (4) passes through the cutting head (2) and extends to the outside. The rubber bellows (32) and the rigid support part (4) can be fixedly connected by bolts.

3. The CVD diamond-coated tool according to claim 1, characterized in that: The tool section (1) has multiple output areas (101) inside, one end of each output area (101) is connected to the interior of the rigid support section (4), and the other end of the output area (101) is connected to the chip removal groove (5); wherein the tool section (1) has a cooling area (102) at the bottom, and the cooling area (102) is connected to the end of the rigid support section (4).

4. The CVD diamond-coated tool according to claim 3, characterized in that: The output area (101) and the cooling area (102) are both composed of a liquid inlet (103), a storage port (104), and an anti-backflow port (105).

Images