CVD diamond coated cutter for metal cutting

Abstract

The invention discloses a CVD (chemical vapor deposition) diamond coating cutter for metal cutting, which comprises a cutting head fixedly mounted at the end of a cutter part and a clamping part for fixing the cutting head, the outer wall of the cutting head is in threaded connection with the inner wall of the clamping part, and the cutting head drives the cutter part to adjust the position through threaded connection. According to the CVD diamond coating cutter for metal cutting, the cutting head is in threaded connection with the clamping part, the rigid supporting part is fixedly installed in the cutter part, the chip groove is formed in the outer wall of the cutter part, and the detachable adding part is installed on the outer wall of the cutter part. And the supporting strength of the cutter part can be effectively improved through the rigid supporting part, the rigid supporting part can play a role in supporting the cutter part when deep hole cutting is carried out on a metal material, and the condition that the cutter part is broken when cutting a deep hole is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of coated tools, in particular to a CVD diamond coated tool for metal cutting. Background Art

[0002] Diamond coated tools are high-performance cutting tools made using chemical vapor deposition technology. This type of tool combines 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 and uniform diamond film on the tool substrate, thereby significantly improving the cutting performance and service life of the tool. The preparation process of CVD diamond coated 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, and a diamond film is deposited on the surface of the tool substrate through chemical reactions. This film has extremely high hardness and wear resistance, and can effectively resist wear and breakage during the cutting process; In the process of cutting metal materials, hole cutting is often performed on the metal materials according to process requirements, and the generated waste chips will be discharged along the chip groove. Due to the difference in the depth of the holes opened, the coated tools often need to be replaced in length during the cutting process. The existing replacement methods mostly replace relatively long coated tools. When processing metal materials with high difficulty or workload, the staff may need to replace the coated tools multiple times. When replacing, the staff first needs to determine the processing 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. For this reason, we propose a CVD diamond coated tool for metal cutting. Summary of the invention

[0003] The object of the present invention is to provide a CVD diamond coated tool for metal cutting to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a CVD diamond coated tool for metal cutting, comprising a cutting head fixedly mounted on the end of a tool part, and a clamping part for fixing the cutting head, an outer wall of the cutting head and an inner wall of the clamping part are connected by a threaded connection, the threaded connection enables the cutting head to drive the tool part to adjust its position, and a rigid support part is fixedly mounted inside the tool part, a chip discharge groove for discharging metal waste is provided on the outer wall of the tool part, and a detachable mounting part is installed on the outer wall of the tool part.

[0005] Preferably, the mounting portion and the chip removal groove on the tool portion form a complete chip removal area for short hole cutting of metal materials.

[0006] Preferably, a breakpoint area is provided on the surface of the mounting portion for deep hole cutting of metal materials, and the breakpoint area cooperates with the chip removal groove to cut off spiral metal waste chips.

[0007] Preferably, the cutting head is fixedly provided with buffer rubbers above and below the thread, and the buffer rubbers are tightly fitted to the clamping portion, forming an interference fit.

[0008] Preferably, the inner wall of the clamping portion is provided with two inclined areas, and the buffer rubber moves to the inclined areas and is squeezed.

[0009] 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, and the rubber bellows and the rigid support part can be fixedly connected by bolts.

[0010] Preferably, a magnetic plate frame is fixedly installed on the top of the cutting head, and a mounting sleeve rotatably connected to it is installed on the inner wall of the top of the clamping part, and a movable rod frame slidably connected to its inner wall is installed inside the mounting sleeve, wherein the end of the movable rod frame passes through the inner wall of the bottom of the mounting sleeve and extends to the outside, and a magnetic frame is fixedly installed on one end of the movable rod frame located outside the mounting sleeve, the magnetic plate frame generates an attractive force on the magnetic frame fitted with it, and a constant force spring is connected between one end of the movable rod frame located inside the mounting sleeve and the inner wall of the mounting sleeve.

[0011] Preferably, a spring sheet is installed inside the magnetic frame, and when the magnetic frame and the magnetic plate frame are attached, the spring sheet contacts the magnetic plate frame, and an electrical component is fixedly installed inside the magnetic frame, and the electrical component is located on the vibration track of the spring sheet.

[0012] Preferably, a plurality of output areas are provided inside the tool part, one end of each output area is connected to the inside of the rigid support part, and the other end of the output area is connected to the chip groove; a cooling area is provided at the bottom of the tool part, and the cooling area is connected to the end of the rigid support part.

[0013] Preferably, the output area and the cooling area are both composed of a liquid inlet, a storage port and an anti-backflow port.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a threaded connection between the cutting head and the clamping part, so that the cutting head can drive the tool part to adjust its position, thereby allowing the tool part to grow, and the rigid support part can effectively increase the support strength of the tool part. When deep hole cutting is performed on metal materials, the rigid support part can support the tool part to avoid the tool part from breaking when cutting deep holes.

[0015] The present invention has a detachable mounting part. When the spiral metal waste passes through the chip discharge groove, the tool part is in a high-speed rotating state, and the spiral metal waste enters and passes through the breakpoint area. Under the extrusion of the inner wall of the chip discharge groove, the spiral metal waste is cut off, and the metal waste with a shorter length is prevented from being blocked in the chip discharge groove, thereby effectively preventing the tool part from breaking and breaking. The present invention can effectively absorb 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.

[0016] The present invention utilizes a spring sheet to absorb the vibration force of the cutting head. The spring sheet amplifies the vibration force, that is, the spring sheet vibrates accordingly. If the vibration intensity is large, the spring sheet will contact the electrical component during the vibration process. The electrical component is connected to the central control equipment of the factory. The central control equipment can be used to notify the staff to carry out maintenance, thereby avoiding the situation where the tool part collapses during the metal cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the clamping portion of the present invention; Figure 3 This is a schematic diagram of the structure of the installation part of the present invention; Figure 4 It is a schematic diagram of the structure of the clamping part and the cutting head of the present invention; Figure 5 For the present invention Figure 2 A schematic diagram of the enlarged structure of the area at center A; Figure 6 This is a schematic diagram of the structure of the sleeve installation of the present invention; Figure 7 It is a schematic diagram of the internal structure of the tool part of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure of the area B in the middle; Fig. 9 For the present invention Figure 7 A magnified schematic diagram of the structure of the area C in the middle.

[0018] In the figure: 1- tool part; 101- output area; 102- cooling area; 103- liquid inlet; 104- storage port; 105- anti-backflow port; 2- cutting head; 21- magnetic plate frame; 22- buffer rubber; 3- clamping part; 31- tilting area; 32- rubber bellows; 33- mounting sleeve; 34- moving rod frame; 35- magnetic frame; 36- constant force spring; 37- spring sheet; 38- electrical element; 4- rigid support part; 5- chip groove; 6- installation part; 61- breakpoint area. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-9 The present invention provides a technical solution: a CVD diamond coated tool for metal cutting. The present invention makes corresponding improvements to the technical problems in the background technology, including a cutting head 2 fixedly installed at the end of a tool part 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, and then the cutting head 2 drives the tool part 1 to adjust its position through the threaded connection. When deep hole cutting of metal materials is required, the staff only needs to turn downward (combined with the attached Figure 2 As shown), the cutting head 2 is adjusted in position in the clamping portion 3, thereby making the tool portion 1 grow. It should be noted that in order to ensure the stability of the tool portion 1 during cutting, the maximum descending distance of the cutting head 2 in the clamping portion 3 is one-third of the entire threaded connection area, and a rigid support portion 4 is fixedly installed inside the tool portion 1. The outer wall of the tool portion 1 is provided with a chip groove 5 for discharging metal waste chips, and a detachable mounting portion 6 is installed on the outer wall of the tool portion 1. Since the chip groove 5 is provided on the surface of the tool portion 1, when the length of the tool portion 1 increases, the strength of the tool portion 1 decreases during the deep hole cutting process. Therefore, the present invention can effectively increase the support strength of the tool portion 1 through the rigid support portion 4. When deep hole cutting is performed on metal materials, the rigid support portion 4 can support the tool portion 1 to avoid the tool portion 1 from breaking when cutting deep holes. As a further limitation of the present invention, the mounting portion 6 can be disassembled and modified accordingly according to the depth of the metal hole cut. Figure 2 and attached Figure 3 As shown in the attached figure, when metal materials are cutting short holes, the following Figure 2The mounting portion 6 shown, the mounting portion 6 and the chip removal groove 5 on the tool portion 1 form a complete chip removal area, which is used for short hole cutting of metal materials. The spiral metal waste generated during cutting will flow out of the hole along the chip removal groove 5; When deep hole cutting is performed on metal materials, the spiral metal waste chips are easily blocked in the deep hole due to their long length when being discharged. At this time, when deep hole cutting is performed, the metal waste chips will affect the chip cutting accuracy and also easily cause the tool part 1 to break and break. Based on this, the corresponding mounting part 6 can be replaced, combined with the attached Figure 3 As shown, a breakpoint area 61 is provided on the surface of the mounting portion 6 for deep hole cutting of metal materials. The breakpoint area 61 cooperates with the chip groove 5 to cut off spiral metal waste chips. When the spiral metal waste chips pass through the chip groove 5, the tool portion 1 is in a high-speed rotating state, and the spiral metal waste chips will enter and pass through the breakpoint area 61. Under the extrusion of the inner wall of the chip groove 5, the spiral metal waste chips are cut off, and the metal waste chips with shorter lengths are prevented from being blocked in the chip groove 5, thereby effectively preventing the tool portion 1 from breaking and breaking.

[0021] And in the actual application process, after the cutting head 2 is adjusted in position in the clamping part 3, the tool part 1 performs deep hole cutting work and generates corresponding vibration force which is transmitted to the threaded connection between the cutting head 2 and the clamping part 3. After long-term 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 makes the following design: the cutting head 2 is fixedly installed with buffer rubber 22 above and below the thread, and the buffer rubber 22 fits tightly with the clamping part 3, which is an interference fit, and the inner wall of the clamping part 3 is provided with two inclined areas 31. The buffer rubber 22 moves to the inclined area 31 and 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 staff needs to increase the force so that the buffer rubber 22 is deformed by the force. The deformed 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 influence of the vibration force on the threaded connection between the cutting head 2 and the clamping part 3. However, as time goes by, the vibration force may still affect the connection strength between the cutting head 2 and the clamping part 3. Based on this, the present invention fixes a magnetic plate frame 21 on the top of the cutting head 2, and installs a mounting sleeve 33 rotatably connected to the clamping part 3 on the top inner wall, and installs a moving rod frame 34 slidably connected to the inner wall of the mounting sleeve 33 inside the mounting sleeve 33, wherein the end of the moving rod frame 34 passes through the bottom inner wall of the mounting sleeve 33 and extends to the outside, and the moving rod frame 34 is located outside the mounting sleeve 33. A magnetic frame 35 is fixedly installed at the end, and the magnetic plate frame 21 generates an attractive force on the magnetic frame 35 that is in contact with it. A constant force spring 36 is connected between one end of the movable rod frame 34 located inside the mounting sleeve 33 and the inner wall of the mounting sleeve 33, and a spring sheet 37 is installed inside the magnetic frame 35. When the magnetic frame 35 and the magnetic plate frame 21 are in contact, the spring sheet 37 contacts the magnetic plate frame 21, and an electrical component 38 is fixedly installed inside the magnetic frame 35, and the electrical component 38 is located on the vibration trajectory of the spring sheet 37.

[0022] Continuing from the above, when the cutting head 2 enters the clamping part 3 through the threaded connection, the magnetic plate frame 21 is in contact with the surface of the magnetic frame 35, and when the cutting head 2 is adjusted in position, the magnetic frame 35 will drop synchronously with it under the action of the attraction of the magnetic plate frame 21. During the dropping process, the moving rod frame 34 compresses the constant force spring 36 inside the mounting sleeve 33, and the spring sheet 37 drops synchronously with the magnetic frame 35. It should be noted that when the magnetic frame 35 is in contact with the magnetic plate frame 21, the spring sheet 37 will contact with the magnetic plate frame 21, and then when the tool part 1 performs deep hole cutting, if a certain vibration force occurs on the tool part 1, the corresponding cutting head 2 will transmit the vibration force to the spring sheet 37, and the spring sheet 37 will amplify the vibration force , that is, the spring sheet 37 vibrates accordingly. If the vibration intensity is large, the spring sheet 37 will contact the electrical component 38 during the vibration process. The electrical component 38 is connected to the central control equipment of the plant, and the central control equipment can be used to notify the staff to carry out maintenance, thereby avoiding the collapse of the tool part 1 during the metal cutting process. It is further explained that when the cutting head 2 is completely inserted into the clamping part 3 through the threaded connection, the magnetic plate frame 21 is tightly fitted with the magnetic frame 35. 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 suction force on the magnetic frame 35, the magnetic plate frame 21 is in the process of adjusting the position with the cutting head 2, and the magnetic frame 35 moves synchronously with the magnetic plate frame 21, and drives the mounting sleeve 33 to move synchronously; During deep hole cutting, it is difficult for the cutting fluid to enter the deep hole to cool the tool part 1, and at the same time, there is relatively little cutting fluid on the surface of the chip groove 5, so the generated metal waste will be blocked in the chip groove 5 due to lack of cutting fluid lubrication. In view of this situation, the present invention makes the following design: first, a rubber bellows 32 rotatably connected to the inner wall of the clamping part 3 is installed on the top of the clamping part 3, wherein the rubber bellows 32 is a cylindrical thin-walled corrugated shell with multiple transverse corrugations, and the rubber bellows 32 is connected to the cutting fluid pipeline, and one end of the rigid support part 4 passes through the cutting head The tool portion 2 extends to the outside, wherein the rubber bellows 32 and the rigid support portion 4 can be fixedly connected by bolts, and a plurality of output areas 101 are opened inside the tool portion 1, one end of each output area 101 is connected to the inside of the rigid support portion 4, and the other end of the output area 101 is connected to the chip groove 5; wherein a cooling area 102 is opened at the bottom of the tool portion 1, and the cooling area 102 is connected to the end of the rigid support portion 4, wherein the output area 101 and the cooling area 102 in the present invention are both composed of a liquid inlet 103, a storage port 104 and an anti-backflow port 105; Combined with Figure 7-9 As shown, the cutting fluid enters the rigid support portion 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 portion 4 respectively. The cooling area 102 at the bottom of the tool portion 1 will transport the cutting fluid to the tool cutting position, thereby effectively taking away the heat of the tool portion 1 during the cutting process and providing lubrication; and the cutting fluid passing through the output area 101 will enter the chip groove 5 to lubricate the metal waste in the chip groove 5 to prevent the metal waste from being blocked in the chip groove 5 due to insufficient lubrication.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CVD diamond coated tool for metal cutting, characterized in that: The invention comprises a cutting head (2) fixedly mounted on the end of a tool part (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 via a thread, and the cutting head (2) drives the tool part (1) to adjust its position via the threaded connection; a rigid support part (4) is fixedly mounted inside the tool part (1); the outer wall of the tool part (1) is provided with a chip discharge groove (5) for discharging metal waste chips, and a detachable mounting part (6) is mounted on the outer wall of the tool part (1).

2. The CVD diamond coated tool according to claim 1, characterized in that: The mounting portion (6) and the chip removal groove (5) on the tool portion (1) form a complete chip removal area for short hole cutting of metal materials.

3. The CVD diamond coated tool according to any one of claims 1-2, characterized in that: The surface of the mounting portion (6) is provided with a breakpoint area (61) for deep hole cutting of metal materials, and the breakpoint area (61) cooperates with the chip removal groove (5) to cut off spiral metal waste chips.

4. The CVD diamond coated tool according to claim 1, characterized in that: The cutting head (2) is fixedly mounted with a buffer rubber (22) above and below the thread, and the buffer rubber (22) is tightly fitted with the clamping portion (3) to form an interference fit.

5. The CVD diamond coated tool according to claim 4, characterized in that: The inner wall of the clamping portion (3) is provided with two inclined areas (31), and the buffer rubber (22) is squeezed when it moves to the inclined areas (31).

6. The CVD diamond coated tool according to claim 1, characterized in that: A rubber bellows (32) is mounted on the top of the clamping portion (3) and is rotatably connected to the inner wall thereof, and the rubber bellows (32) is in communication with a cutting fluid pipeline, and one end of the rigid support portion (4) passes through the cutting head (2) and extends to the outside, wherein the rubber bellows (32) and the rigid support portion (4) can be fixedly connected by bolts.

7. The CVD diamond coated tool according to any one of claims 1 to 6, characterized in that: A magnetic plate frame (21) is fixedly mounted on the top of the cutting head (2), and a mounting sleeve (33) rotatably connected thereto is mounted on the inner wall of the top of the clamping portion (3), and a movable rod frame (34) slidably connected thereto is mounted inside the mounting sleeve (33), wherein the end of the movable rod frame (34) passes through the inner wall of the bottom of the mounting sleeve (33) and extends to the outside, and a magnetic frame (35) is fixedly mounted on one end of the movable rod frame (34) located outside the mounting sleeve (33), the magnetic plate frame (21) generates an attractive force on the magnetic frame (35) attached thereto, and a constant force spring (36) is connected between one end of the movable rod frame (34) located inside the mounting sleeve (33) and the inner wall of the mounting sleeve (33).

8. The CVD diamond coated tool according to claim 7, characterized in that: A spring sheet (37) is installed inside the magnetic frame (35); when the magnetic frame (35) is attached to the magnetic plate frame (21), the spring sheet (37) is in contact with the magnetic plate frame (21); and an electrical element (38) is fixedly installed inside the magnetic frame (35); the electrical element (38) is located on the vibration track of the spring sheet (37).

9. The CVD diamond coated tool according to claim 2, characterized in that: The tool portion (1) is provided with a plurality of output areas (101) inside, one end of each of the output areas (101) is connected to the inside of the rigid support portion (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 portion (1), and the cooling area (102) is connected to the end of the rigid support portion (4).

10. The CVD diamond coated tool according to claim 9, 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).

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