Double-inner-cooling-hole hard alloy reamer for cutting

Abstract

The utility model belongs to the technical field of reamers, particularly relates to a double-inner-cooling-hole hard alloy reamer used for cutting, and aims to solve the problems that an existing single-inner-cooling-hole reamer is limited in cooling effect and difficult to meet some high-precision and high-efficiency machining, the following scheme is provided: the double-inner-cooling-hole hard alloy reamer comprises a reamer body, a reamer holder and a mounting head, the double-channel structure is adopted, the flow of a cooling medium is greatly increased, the heat dissipation area is greatly increased, heat in the cutter body can be taken away more quickly, the cooling effect is more remarkable than that of a single channel, the first inner cooling branch channel, the inner cooling branch pipe and the second inner cooling branch channel extend to the outer side of the cutter body, and the cooling effect is better. The cooling medium can be directly guided to cutting areas such as the cutting edges, especially near the first cutting edge and the second cutting edge, the parts generate most heat in the cutting process, targeted efficient cooling can be achieved, tool abrasion can be reduced, the service life of the cutting edges can be prolonged, the cutting performance of the cutting edges can be improved, and the requirements for high-precision and high-efficiency machining are met.

Description

Technical Field

[0001] This utility model relates to an alloy reamer, specifically a double internal cooling hole carbide reamer for cutting, belonging to the field of reamer technology. Background Technology

[0002] In machining, reamers are tools used to finish drilled or bored holes. Carbide reamers, due to their high hardness and good wear resistance, are widely used in the precision machining of various materials. During reaming, a large amount of cutting heat is generated. If this heat is not dissipated in time, it can lead to accelerated tool wear, decreased machining accuracy, and deterioration of the surface quality of the machined material. Traditional single-internal-cooling reamers have limited cooling effects, making it difficult to meet the demands of some high-precision, high-efficiency machining processes. Utility Model Content

[0003] This invention provides a carbide reamer with double internal cooling holes for cutting, which addresses the problem that existing single internal cooling hole reamers have limited cooling effects and cannot meet the requirements of some high-precision and high-efficiency machining.

[0004] The present invention achieves the above objectives through the following technical solution: a double internal cooling hole carbide reamer for cutting, comprising a tool body, a tool holder and a mounting head, wherein the tool holder is fixedly connected to the top end of the tool body and the mounting head is fixedly connected to the upper surface of the tool holder;

[0005] The blade body has a first cutting edge and a second cutting edge arranged in a circular pattern on its surface. The first cutting edge is located above the second cutting edge, and the bottom end of the first cutting edge is connected to the top end of the second cutting edge. A first internal cooling deep hole is opened at the axis position inside the blade body. An internal cooling pipe is fixedly connected inside the first internal cooling deep hole. A first internal cooling channel is set inside the internal cooling pipe. The first internal cooling channel penetrates the interior of the blade body and extends to the bottom side of the blade body. A second internal cooling channel is formed between the internal cooling pipe and the first internal cooling deep hole. The first internal cooling channel and the second internal cooling channel are arranged concentrically. Multiple sets of first internal cooling branch channels are opened at equal intervals from top to bottom on the surface of the internal cooling pipe and the blade body. An internal cooling branch pipe is fixedly connected to each corresponding position of the first internal cooling branch channel. The internal cooling branch pipe extends to the outside of the blade body. Several sets of second internal cooling branch channels are opened at equal intervals from top to bottom on the surface of the second internal cooling channel. The second internal cooling branch channels extend to the outside of the blade body.

[0006] As a further improvement of this utility model: the coolant outlet ends of both the first internal cooling branch channel and the second internal cooling branch channel face downwards, and the inclination angle of the first internal cooling branch channel is greater than that of the second internal cooling branch channel.

[0007] As a further improvement of this utility model, the surface of the blade body is provided with a chip removal groove in a circular shape.

[0008] As a further embodiment of this utility model: the coolant outlet of the first internal cooling branch channel is disposed on the surface of the first cutting edge and the second cutting edge, and the coolant outlet of the second internal cooling branch channel is disposed on the surface of the chip removal groove.

[0009] As a further improvement of this utility model: both the tool holder and the mounting head are provided with a second internal cooling deep hole, the two second internal cooling deep holes are connected, the diameter of the second internal cooling deep hole is the same as that of the first internal cooling deep hole, and the second internal cooling deep hole is connected to the first internal cooling deep hole.

[0010] As a further improvement of this utility model: the surface of the mounting head is also provided with a mounting groove, the mounting groove and the second internal cooling deep hole are arranged on the same axis, and the filter plate is fixedly connected inside the mounting groove by screws.

[0011] As a further improvement of this utility model, a sealing ring is fixedly connected to the surface of the mounting head.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting up a first internal cooling deep hole, an internal cooling pipe, a first internal cooling channel, a second internal cooling channel, an internal cooling branch pipe, a second internal cooling branch channel, and a first internal cooling branch channel, achieves a dual-channel structure. During use, the internal cooling pipe in the first internal cooling deep hole forms the first internal cooling channel, and the internal cooling pipe and the first internal cooling deep hole form the second internal cooling channel, with the two channels being concentric. This dual-channel structure greatly increases the flow rate and heat dissipation area of ​​the cooling medium, enabling it to remove heat from the inside of the tool body more quickly. The cooling effect is more significant than that of a single channel. Furthermore, the first internal cooling branch channel, the internal cooling branch pipe, and the second internal cooling branch channel extend to the outside of the tool body, allowing the cooling medium to be directly guided to the cutting areas such as the cutting edge, especially near the first and second cutting edges, where the most heat is generated during cutting. This enables targeted and efficient cooling, reduces tool wear, and improves the service life and cutting performance of the cutting edge.

[0014] 2. In this utility model, the inclination angle of the first internal cooling branch channel is greater than that of the second internal cooling branch channel. The larger inclination angle of the first internal cooling branch channel allows the coolant to be sprayed at a steeper angle to a farther position on the outside of the tool body when it flows out, thus covering a larger area. The coolant outlet is downward and has different inclination angles, which can utilize gravity to make the coolant flow to the parts that need cooling faster, accelerate the flow speed and renewal frequency of the coolant, and remove heat more quickly, thereby improving cooling efficiency. Furthermore, the coolant flows downward at different inclination angles, which can also form a liquid flow with a certain direction and force on the surface of the tool body, effectively washing away chips and other impurities generated during the cutting process, preventing impurities from accumulating on the surface of the tool body or at the cutting edge, and avoiding interference from impurities to the cutting process and wear on the tool body.

[0015] 3. By setting a chip removal groove, this utility model can discharge the generated chips from the hole during the milling process, thus avoiding the accumulation of chips in the hole.

[0016] 4. In this utility model, the coolant outlet of the first internal cooling branch channel is on the surface of the first and second cutting edges, which can directly cool the cutting edges, prevent the cutting edges from softening, wearing or even chipping due to high temperature during cutting, maintain the hardness and sharpness of the cutting edges, and extend the service life of the tool. At the same time, the coolant outlet of the second internal cooling branch channel is on the surface of the chip removal groove, and the coolant can form a liquid flow in the chip removal groove to quickly flush away the chips, prevent the chips from accumulating in the chip removal groove, and ensure smooth chip removal.

[0017] 5. By setting up an installation groove, screws, and filter plate, this utility model can filter impurities in the coolant during use, preventing impurities such as metal shavings and dust from entering the second internal cooling deep hole and the entire cooling system. This avoids impurities flowing with the coolant to parts such as the tool body, reducing wear and corrosion on the cutting edge and internal structure of the tool, helping to maintain the precision and performance of the tool, and extending the tool's service life.

[0018] 6. By setting a sealing ring, this utility model can form a sealing barrier at the connection between the mounting head and the machine tool component, preventing coolant from leaking out from the interface. At the same time, the sealing ring can also prevent external impurities from entering the cooling system, avoiding impurities from clogging the cooling channel or wearing internal components, thus affecting the cooling effect and tool performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance and structure of the present utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the appearance and structure of the present utility model. Figure 2 ;

[0021] Figure 3 This is a schematic cross-sectional view of the blade body in this utility model. Figure 1 ;

[0022] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 This is a schematic cross-sectional view of the blade body in this utility model. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the connection position between the mounting head and the filter plate in this utility model;

[0025] Figure 7 This is a cross-sectional structural diagram of the mounting head and the tool holder in this utility model;

[0026] Figure 8 This is a schematic diagram of the filter plate in this utility model.

[0027] In the diagram: 1. Blade body, 2. Blade holder, 3. Mounting head, 4. First cutting edge, 5. Second cutting edge, 6. Chip removal groove, 7. First internal cooling branch channel, 8. Second internal cooling branch channel, 9. Sealing ring, 10. Internal cooling pipe, 11. Second internal cooling channel, 12. Internal cooling branch pipe, 13. Second internal cooling deep hole, 14. Mounting groove, 15. Filter plate, 16. Screw, 17. First internal cooling deep hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0029] like Figures 1 to 8 As shown, a double internal cooling hole carbide reamer for cutting includes a tool body 1, a tool holder 2, and a mounting head 3. The tool holder 2 is fixedly connected to the top of the tool body 1, and the mounting head 3 is fixedly connected to the upper surface of the tool holder 2.

[0030] The surface of the blade body 1 is circumferentially provided with a first cutting edge 4 and a second cutting edge 5. The first cutting edge 4 is located above the second cutting edge 5, and the bottom end of the first cutting edge 4 is connected to the top end of the second cutting edge 5. A first internal cooling deep hole 17 is opened at its axial position inside the blade body 1. An internal cooling pipe 10 is fixedly connected inside the first internal cooling deep hole 17. A first internal cooling channel is provided inside the internal cooling pipe 10, which penetrates the interior of the blade body 1 and extends to the bottom side of the blade body 1. A second internal cooling channel 11 is formed between the internal cooling pipe 10 and the first internal cooling deep hole 17. The first internal cooling channel and the second internal cooling channel 11 are concentrically arranged. Multiple sets of first internal cooling branch channels 7 are equally spaced from top to bottom on the surface of the internal cooling pipe 10 and the blade body 1. An internal cooling branch pipe 12 is fixedly connected to each corresponding position of the first internal cooling branch channel 7. The internal cooling branch pipe 12 extends to the outside of the blade body 1. The second internal cooling channel 11... The surface of the tool body 1 is provided with several sets of second internal cooling branch channels 8 at equal intervals from top to bottom. The second internal cooling branch channels 8 extend to the outside of the tool body 1. During use, the internal cooling pipe 10 in the first internal cooling deep hole 17 forms the first internal cooling channel, and the internal cooling pipe 10 and the first internal cooling deep hole 17 form the second internal cooling channel 11. The two channels are concentric. This dual-channel structure greatly increases the flow rate and heat dissipation area of ​​the cooling medium, and can remove the heat inside the tool body 1 more quickly. The cooling effect is more significant than that of a single channel. Furthermore, the first internal cooling branch channel 7, the internal cooling branch pipe 12, and the second internal cooling branch channel 8 extend to the outside of the tool body 1, which can directly guide the cooling medium to the cutting areas such as the cutting edge, especially near the first cutting edge 4 and the second cutting edge 5. These parts generate the most heat during the cutting process, which can achieve targeted and efficient cooling, reduce tool wear, and improve the service life and cutting performance of the cutting edge. Example 2

[0031] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0032] The coolant outlets of both the first internal cooling branch channel 7 and the second internal cooling branch channel 8 are downward-facing, and the inclination angle of the first internal cooling branch channel 7 is greater than that of the second internal cooling branch channel 8. The larger inclination angle of the first internal cooling branch channel 7 allows the coolant to be sprayed at a steeper angle to a farther position on the outside of the tool body 1, covering a larger area. The downward-facing coolant outlets with different inclination angles allow the coolant to flow to the parts that need cooling more quickly using gravity, accelerating the flow rate and turnover frequency of the coolant, and removing heat more rapidly, thus improving cooling efficiency. Furthermore, the downward flow of the coolant at different inclination angles can also form a liquid flow with a certain direction and force on the surface of the tool body 1, effectively washing away chips and other impurities generated during the cutting process, preventing impurities from accumulating on the surface of the tool body 1 or at the cutting edge, and avoiding interference from impurities to the cutting process and wear on the tool body 1.

[0033] The surface of the cutter body 1 is provided with a chip removal groove 6 in a circular shape, which can discharge the generated chips from the hole during the milling process and prevent the chips from accumulating in the hole.

[0034] The coolant outlet of the first internal cooling branch channel 7 is located on the surface of the first cutting edge 4 and the second cutting edge 5, and the coolant outlet of the second internal cooling branch channel 8 is located on the surface of the chip removal groove 6. The coolant outlet of the first internal cooling branch channel 7 is located on the surface of the first cutting edge 4 and the second cutting edge 5, which can directly cool the cutting edge, prevent the cutting edge from softening, wearing or even chipping due to high temperature during cutting, maintain the hardness and sharpness of the cutting edge, and extend the service life of the tool. At the same time, the coolant outlet of the second internal cooling branch channel 8 is located on the surface of the chip removal groove 6, and the coolant can form a liquid flow in the chip removal groove 6 to quickly flush away the chips, prevent the chips from accumulating in the chip removal groove 6, and ensure smooth chip removal.

[0035] Both the tool holder 2 and the mounting head 3 have a second internal cooling deep hole 13 inside. The two second internal cooling deep holes 13 are connected. The diameter of the second internal cooling deep hole 13 is the same as that of the first internal cooling deep hole 17. The coolant flows in the connected internal cooling deep holes, which can balance the heat among the various parts of the tool, making the temperature distribution of the tool body 1, tool holder 2 and mounting head 3 more uniform, reducing thermal stress and deformation caused by temperature differences, and helping to ensure the accuracy and stability of the tool. Example 3

[0036] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0037] The surface of the mounting head 3 is also provided with a mounting groove 14. The mounting groove 14 and the second internal cooling deep hole 13 are arranged on the same axis. A filter plate 15 is fixedly connected inside the mounting groove 14 by screws 16. The filter plate 15 can filter impurities in the coolant and prevent impurities such as metal chips and dust from entering the second internal cooling deep hole 13 and the entire cooling system. This avoids impurities flowing with the coolant to parts such as the tool body 1, reduces wear and corrosion on the cutting edge and internal structure of the tool, helps maintain the accuracy and performance of the tool, and extends the tool's service life.

[0038] A sealing ring 9 is fixedly connected to the surface of the mounting head 3, which can form a sealing barrier at the connection between the mounting head 3 and the machine tool component, preventing coolant from leaking out from the interface. At the same time, the sealing ring 9 can also prevent external impurities from entering the cooling system, avoiding impurities from clogging the cooling channel or wearing internal components, thus affecting the cooling effect and tool performance.

[0039] Working principle: When using it, first check whether all parts of the reamer are intact, including the cutter body 1, cutter holder 2, mounting head 3, filter plate 15, sealing ring 9, etc., and confirm that the machine tool spindle connection is clean and free of impurities. Prepare the necessary tools for installation, such as wrenches.

[0040] Next, the filter plate 15 is placed into the mounting groove 14 on the surface of the mounting head 3. The mounting groove 14 is coaxially aligned with the second internal cooling deep hole 13. The filter plate 15 is fixed with screws 16 to ensure that the filter plate 15 is firmly installed and can effectively filter impurities in the coolant to prevent them from entering the cooling system.

[0041] Next, align the mounting head 3 with the interface of the machine tool spindle, insert it smoothly, and tighten it. The sealing ring 9 on the surface of the mounting head 3 will then fit tightly against the connection part of the machine tool component, forming a sealing layer. This prevents coolant leakage and ensures the integrity of the cooling system. It also prevents external impurities from entering the cooling system, ensuring that the cooling effect is not affected.

[0042] During this process, since the second internal cooling deep hole 13 inside the tool holder 2 and the mounting head 3 are interconnected and also connected to the first internal cooling deep hole 17 of the tool body 1, the coolant flows in from the machine tool's cooling system interface and can pass through the mounting head 3, the second internal cooling deep hole 13 of the tool holder 2 in sequence, and then enter the first internal cooling deep hole 17 of the tool body 1, thus constructing a complete coolant flow path and preparing for subsequent cooling.

[0043] Next, the machine tool's cooling system is turned on, and the coolant begins to flow. In the first internal cooling deep hole 17 of the tool body 1, the internal cooling pipe 10 forms the first internal cooling channel, and the internal cooling pipe 10 and the first internal cooling deep hole 17 form the second internal cooling channel 11. The coolant flows in these two channels respectively, which greatly increases the flow rate and heat dissipation area of ​​the cooling medium and quickly removes the heat generated inside the tool body 1.

[0044] During milling, the machine tool is started, and the reamer begins to rotate at high speed. The first cutting edge 4 and the second cutting edge 5, which are circumferentially distributed on the surface of the cutter body 1, cut into the workpiece during rotation. The first cutting edge 4 is located above the second cutting edge 5 and its bottom end is in contact with the top end of the second cutting edge 5. Utilizing the high hardness and wear resistance of cemented carbide, the workpiece is milled to remove material and gradually achieve the required machining accuracy.

[0045] As cutting progresses, friction between the tool and the workpiece generates a large amount of heat and produces chips. At this point, the cooling system comes into full play. The first internal cooling branch channel 7 and the internal cooling pipe 12 guide the coolant from the first internal cooling channel to the surfaces of the first cutting edge 4 and the second cutting edge 5, directly cooling the cutting edges to prevent them from softening, wearing, or chipping due to high temperatures, thus maintaining their cutting performance. The second internal cooling branch channel 8 guides the coolant from the second internal cooling channel 11 to the surface of the chip removal groove 6. The coolant forms a liquid flow within the chip removal groove 6, quickly flushing away the chips and preventing their accumulation. This ensures smooth chip removal, avoiding interference with the cutting process and wear on the tool body 1.

[0046] Meanwhile, the coolant outlets of the first internal cooling branch channel 7 and the second internal cooling branch channel 8 are both downward, and the first internal cooling branch channel 7 has a larger tilt angle. By utilizing gravity and different spray angles, the coolant flow speed and renewal frequency are accelerated, heat is carried away more quickly, and the range of cooling and washing away chips is expanded.

[0047] After completing the milling task, first shut off the cooling system to stop the coolant flow. Then reduce the machine tool speed until the reamer stops rotating completely. Carefully remove the reamer from the machine tool spindle, store it properly, clean and maintain the reamer, and check all parts for damage or wear to prepare it for the next use.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double internal cooling hole carbide reamer for cutting, comprising a tool body (1), a tool holder (2), and a mounting head (3), characterized in that: The tool holder (2) is fixedly connected to the top of the tool body (1), and the mounting head (3) is fixedly connected to the upper surface of the tool holder (2); The surface of the blade body (1) is circumferentially provided with a first cutting edge (4) and a second cutting edge (5). The first cutting edge (4) is located above the second cutting edge (5), and the bottom end of the first cutting edge (4) and the top end of the second cutting edge (5) are connected together. The interior of the blade body (1) is provided with a first internal cooling deep hole (17) at its axial position. An internal cooling pipe (10) is fixedly connected inside the first internal cooling deep hole (17). The interior of the internal cooling pipe (10) is provided with a first internal cooling channel. The first internal cooling channel penetrates the interior of the blade body (1) and extends to the bottom side of the blade body (1). The internal cooling pipe (10) and the first internal cooling channel are connected together. A second internal cooling channel (11) is formed between the deep holes (17). The first internal cooling channel and the second internal cooling channel (11) are arranged concentrically. Multiple sets of first internal cooling branch channels (7) are opened at equal intervals from top to bottom on the surface of the internal cooling pipe (10) and the blade body (1). An internal cooling branch pipe (12) is fixedly connected in each corresponding position of the first internal cooling branch channel (7). The internal cooling branch pipe (12) extends to the outside of the blade body (1). Several sets of second internal cooling branch channels (8) are opened at equal intervals from top to bottom on the surface of the second internal cooling channel (11). The second internal cooling branch channels (8) extend to the outside of the blade body (1).

2. The double internal cooling hole carbide reamer for cutting according to claim 1, characterized in that: The coolant outlets of the first internal cooling branch channel (7) and the second internal cooling branch channel (8) are both downward, and the tilt angle of the first internal cooling branch channel (7) is greater than that of the second internal cooling branch channel (8).

3. The double internal cooling hole carbide reamer for cutting according to claim 2, characterized in that: The surface of the blade (1) is provided with a chip removal groove (6) in a circular pattern.

4. The double internal cooling hole carbide reamer for cutting according to claim 3, characterized in that: The coolant outlet of the first internal cooling branch channel (7) is located on the surface of the first cutting edge (4) and the second cutting edge (5), and the coolant outlet of the second internal cooling branch channel (8) is located on the surface of the chip removal groove (6).

5. The double internal cooling hole carbide reamer for cutting according to claim 1, characterized in that: The tool holder (2) and the mounting head (3) are both provided with a second internal cooling deep hole (13). The two second internal cooling deep holes (13) are connected. The diameters of the second internal cooling deep hole (13) and the first internal cooling deep hole (17) are the same, and the second internal cooling deep hole (13) and the first internal cooling deep hole (17) are connected.

6. The double internal cooling hole carbide reamer for cutting according to claim 5, characterized in that: The surface of the mounting head (3) is also provided with a mounting groove (14), the mounting groove (14) and the second internal cooling deep hole (13) are arranged on the same axis, and the filter plate (15) is fixedly connected inside the mounting groove (14) by screws (16).

7. The double internal cooling hole carbide reamer for cutting according to claim 6, characterized in that: A sealing ring (9) is fixedly connected to the surface of the mounting head (3).

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