Numerical control machine tool milling cutter system based on double cooling channels

Abstract

The invention relates to the technical field of machine tool milling cutters, and discloses a numerical control machine tool milling cutter system based on double cooling channels, which comprises a cutter handle, a mounting shaft and a disc milling cutter are arranged at the lower end of the cutter handle, a threaded groove is formed in the outer wall of the mounting shaft, and a plurality of blades are connected to the circumferential outer wall of the disc milling cutter through threaded pieces. The locking block is connected with the mounting shaft in a threaded connection mode, a cooling channel is formed in the mounting shaft, and a plurality of communicating pipelines are arranged on the outer wall of the disc milling cutter. The numerical control machine tool milling cutter system based on the double cooling channels can effectively solve the problems that in the prior art, due to the fact that the cutting area of a disc milling cutter is large, cutting fluid splashes all around when being directly sprayed to the rotating milling cutter, cooling liquid is wasted, meanwhile, the milling cutter has strong centrifugal force during high-speed rotation, and the machining efficiency is improved. Therefore, the cooling liquid is difficult to effectively permeate and attach to the key cutting edge and the cutting area, so that the problems of insufficient and non-uniform cooling are solved.

Description

Technical Field

[0001] This invention relates to the field of cutting tool forming technology, and more specifically to a CNC machine tool milling cutter system based on dual cooling channels. Background Technology

[0002] In the field of machining, milling is a widely used material removal process. This process uses a rotating multi-edged milling cutter to cut a workpiece fixed on a worktable, thereby obtaining the desired shape, size, and surface finish. During milling, a large amount of cutting heat is generated due to high-speed friction and intense plastic deformation between the cutter and the workpiece. Therefore, adequately cooling the milling cutter during the cutting process is a crucial step in ensuring machining efficiency, product quality, and tool life.

[0003] Disc cutters are an important type of milling cutter. They are disc-shaped, have a large cutting diameter and many cutting edges, and are mainly used for milling large flat surfaces. Due to their large cutting area and high material removal rate, the heat generated during the machining process is more concentrated and intense.

[0004] Because of the large cutting area of ​​disc milling cutters, the spray coverage of a single pipeline is limited. Direct spraying onto the rotating milling cutter will result in splashing everywhere, causing a great waste of coolant and increasing production costs. At the same time, the milling cutter has a strong centrifugal force when rotating at high speed, making it difficult for coolant to effectively penetrate and adhere to the critical cutting edge and cutting area, resulting in insufficient and uneven cooling. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a CNC machine tool milling cutter system based on dual cooling channels. This system effectively solves the problems in existing technologies where, due to the large cutting area of ​​disc milling cutters, the spray coverage of a single pipeline is limited, resulting in splashing of coolant everywhere when directly sprayed onto the rotating milling cutter. This leads to significant waste of coolant and increased production costs. Furthermore, the strong centrifugal force of the milling cutter during high-speed rotation makes it difficult for coolant to effectively penetrate and adhere to the critical cutting edges and cutting areas, resulting in insufficient and uneven cooling.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a CNC machine tool milling cutter system based on dual cooling channels, comprising:

[0008] The upper end of the tool holder is pneumatically connected to the equipment, and the lower end of the tool holder is fixedly equipped with a mounting shaft with a threaded groove on its outer wall.

[0009] A disc end mill has a through hole at its center, through which a mounting shaft passes and several inserts are connected to the outer circumference of the disc end mill via threaded connections.

[0010] The locking block is connected to the mounting shaft via a threaded connection and performs the clamping and limiting function for the disc milling cutter;

[0011] The mounting shaft has a cooling channel connected to an external cooling pipe, and the outer wall of the disc milling cutter has several connecting pipes connected to the corresponding cooling channels between two adjacent inserts.

[0012] The bottom end of the mounting shaft has several through slots along the circumference, and a baffle plate is set inside the through slots to block the disc milling cutter.

[0013] The two side walls of the through groove near the baffle plate are provided with sliding grooves that extend in the vertical direction. Inside the sliding grooves, a linkage block is slidably installed by a top pressure spring.

[0014] A clamping block is provided between two linkage blocks inside the same through slot. The clamping block has a chamfer near the center of the baffle plate. In the initial state, the clamping block is located on the side near the center of the baffle plate.

[0015] The center of the disc milling cutter is provided with a mating groove corresponding to the position of the through groove, and the arc-shaped inner wall of the mating groove is provided with several semi-circular grooves along its extension direction.

[0016] The inner circumference of the locking block is provided with an adjusting block located inside the mounting shaft through several connecting blocks. The locking block is rotatably connected to several connecting blocks. The side wall of the adjusting block near the pressing block is chamfered. In the initial state, the adjusting block and the pressing block are in a non-contact state.

[0017] Furthermore, the outer wall of the adjusting block is provided with an annular plate, and the outer wall of the annular plate is connected to several connecting blocks.

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] In the structural design of the disc milling cutter, the area between two adjacent inserts is set in an arc shape. When coolant is sprayed out along the cooling channel and connecting pipe, the disc milling cutter is rotating at high speed, and the sprayed coolant is effectively captured by this arc-shaped area. The coolant first impacts one side wall of the arc-shaped area, and then, under the combined action of centrifugal force and the shape of the flow channel, it is guided to impact the other side wall. This process repeats, and in a very short time, the sprayed coolant is continuously constrained and impacted within the arc-shaped area, eventually forming a stable and concentrated liquid flow that falls evenly onto the milling area and inserts below. This design transforms the rotation of the cutter from a factor that hinders cooling into an aid that promotes the uniform distribution of coolant and enhances the cooling effect, achieving efficient and dynamic cooling of the milling area and inserts. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram from a first perspective of an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram from a second perspective of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional separation of the tool holder and the disc milling cutter in an embodiment of the present invention;

[0024] Figure 4 This is an embodiment of the present invention. Figure 3 A magnified structural diagram of part A in the middle;

[0025] Figure 5 This is a schematic diagram of the three-dimensional separation of the mounting shaft and the clamping block according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional separation of the disc milling cutter, locking block, and adjusting block in an embodiment of the present invention.

[0027] The labels in the diagram represent: 1. Tool holder; 11. Mounting shaft; 111. Threaded groove; 112. Through groove; 113. Block; 114. Sliding groove; 12. Linkage block; 13. Clamping block; 14. Cooling channel; 2. Disc end mill; 21. Through hole; 22. Insert; 23. Connecting pipe; 24. Mating groove; 25. Semi-circular groove; 3. Locking block; 31. Adjusting block; 32. Connecting block; 33. Annular plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] The present invention will be further described below with reference to embodiments.

[0030] Example:

[0031] Please see Figure 1 - Figure 6 This invention provides a technical solution: a CNC machine tool milling cutter system based on dual cooling channels, comprising:

[0032] The upper end of the tool holder 1 is pneumatically connected to the equipment, and the lower end of the tool holder 1 is fixedly provided with a mounting shaft 11 with a threaded groove 111 on the outer wall.

[0033] The disc milling cutter 2 has a through hole 21 at its center. The through hole 21 passes through the mounting shaft 11 and is located on the outer circumference of the disc milling cutter 2. Several cutting tools 22 are connected to it by threaded parts.

[0034] Locking block 3 is connected to mounting shaft 11 via a threaded connection and performs the clamping and limiting function on disc milling cutter 2;

[0035] The mounting shaft 11 has a cooling channel 14 connected to an external cooling pipe, and the outer wall of the disc milling cutter 2 and between two adjacent inserts 22 have several connecting pipes 23 connected to the corresponding cooling channel 14.

[0036] The bottom end of the mounting shaft 11 has several through slots 112 along the circumferential direction. A baffle plate 113 is provided inside the several through slots 112. The baffle plate 113 is used to block the disc milling cutter 2.

[0037] The two side walls of the through groove 112 near the baffle plate 113 are provided with sliding grooves 114 extending in the vertical direction. The sliding groove 114 is slidably provided with a linkage block 12 through a top pressure spring.

[0038] A clamping block 13 is provided between two linkage blocks 12 inside the same through slot 112. The clamping block 13 has a chamfer near the center of the baffle plate 113. In the initial state, the clamping block 13 is located on the side near the center of the baffle plate 113.

[0039] The center of the disc milling cutter 2 is provided with a mating groove 24 corresponding to the position of the through groove 112, and the arc-shaped inner wall of the mating groove 24 is provided with a number of semi-circular grooves 25 along its extension direction.

[0040] The inner circumference of the locking block 3 is provided with an adjusting block 31 located inside the mounting shaft 11 through several connecting blocks 32. The locking block 3 is rotatably connected to several connecting blocks 32. The side wall of the adjusting block 31 near the pressing block 13 is chamfered. In the initial state, the adjusting block 31 and the pressing block 13 are in a non-contact state.

[0041] The outer wall of the adjusting block 31 is provided with an annular plate 33, and the outer wall of the annular plate 33 is connected to a plurality of connecting blocks 32.

[0042] In specific work:

[0043] The disc milling cutter is an important type of milling cutter. It is disc-shaped, has a large cutting diameter and many cutting edges, and is mainly used for milling large flat surfaces. Due to its large cutting area and high material removal rate, the heat generated during the machining process is more concentrated and intense.

[0044] Because the disc end mill 2 has a large cutting area, the spray coverage of a single pipe is limited. Direct spraying onto the rotating end mill results in splashing everywhere, causing a significant waste of coolant and increasing production costs. At the same time, the end mill has a strong centrifugal force when rotating at high speed, making it difficult for the coolant to effectively penetrate and adhere to the critical cutting edge and cutting area, leading to insufficient and uneven cooling. Based on this, the mounting axis 11 of the CNC machine tool end mill system based on dual cooling channels has two cooling channels 14 connected to external cooling pipes. The outer wall of the disc end mill 2 has several connecting pipes 23 connected to the cooling channels 14 between two adjacent inserts 22. Through the arrangement of the cooling pipes and connecting pipes 23, the coolant can be sprayed out along the connecting pipes 23 and act directly on the inserts 22, thereby achieving the cooling of the inserts 22 and the cutting area.

[0045] The disc end mill 2 and the mounting shaft 11 are detachable. During installation, the operator first places the disc end mill 2 onto the mounting shaft 11, aligning the mating groove 24 with the through groove 112. After the upper end face of the disc end mill 2 is in close contact with the stop plate 113, the locking block 3 is screwed into the mounting shaft 11. During the screwing in of the locking block 3, not only is the lower end face of the disc end mill 2 secured, but the cooperation between the adjusting block 31 and the abutment block 13 further secures the inner wall of the disc end mill 2, ensuring its stability during subsequent milling and preventing tooth wear after prolonged machining. 2. Problem of shaking (specifically, the inner arc-shaped wall of the groove 24 of the disc end mill 2 is provided with several semi-circular grooves 25 along its extension direction, and the outer arc-shaped wall of the clamping block 13 is provided with arc-shaped protrusions corresponding to the positions of several semi-circular grooves 25. In the initial state, in order to ensure the smooth entry of the disc end mill 2, several clamping blocks 13 are located on the side close to the center of the mounting shaft 11. During the process of screwing the locking block 3 into the mounting shaft 11, the adjusting block 31 provided on it will enter the interior of the mounting shaft 11 first. The purpose of opening the connecting pipe 23 is not only to ensure the smooth entry of the adjusting block 31, but also to limit the connection block 32 through the side wall of the connecting pipe 23, ensuring that it is in the position of the connecting block 32.) After locking, the stability of the position is ensured. When the locking block 3 rotates, several connecting blocks 32 rotate with it, thus gradually driving the adjusting block 31 to move along the connecting pipe 23. During the movement, the adjusting groove cooperates with the chamfer on the abutting block 13 to push against several abutting blocks 13, causing the abutting blocks 13 to move away synchronously and towards the side closer to the inner wall of the disc milling cutter 2. As the abutting blocks 13 move, the linkage block 12 moves synchronously and presses the top spring upward. As the abutting blocks 13 gradually move, several arc-shaped protrusions on their arc-shaped outer walls enter the corresponding semi-circular grooves 25, thereby achieving the multi-directional pressure on the disc milling cutter 2. The device performs multi-directional limiting operations. Simultaneously, after the arc-shaped protrusion enters the corresponding semi-circular groove 25, the locking block 3 gradually comes into close contact with the lower end face of the disc milling cutter 2. The blocking plate 113 and the locking block 3 limit the vertical movement of the disc milling cutter 2. During this process, the abutting block 13 abuts against the inner wall of the disc milling cutter 2, thereby achieving multi-directional abutmentation of the disc milling cutter 2. Through the same installation step, multi-directional locking can be achieved, which not only simplifies the installation process and improves the replacement efficiency of the disc milling cutter 2, but also further improves the stability of the disc milling cutter 2 installation by multi-directional limiting and locking, laying the foundation for subsequent long-term milling operations.

[0046] It should be noted that after the disc end mill 2 is installed and in the milling operation, the cooling channel 14 and the connecting pipe 23 work together to cool the insert 22 and the milling area. (Specifically, the connecting pipe 23 is set between two adjacent inserts 22, and the space between the two adjacent inserts 22 is set in an arc shape. During the cooling process of the insert 22 and the milling part, the coolant is sprayed out along the cooling channel 14 and the connecting pipe 23. Since the disc end mill 2 rotates at high speed during operation, the sprayed coolant is captured by the arc-shaped area between the two adjacent inserts 22, and the coolant is impacted by one side wall of the arc-shaped area onto the other side wall. This process is repeated, and the sprayed coolant is continuously impacted by the arc-shaped area, thus falling onto the milling area and the insert 22 to complete the cooling of the milling area and the insert 22.)

[0047] It is worth emphasizing that this CNC machine tool milling cutter system based on dual cooling channels has the following main advantages:

[0048] Advantage 1: In the structural design of the disc end mill 2, the area between two adjacent inserts 22 is set as an arc. When the coolant is sprayed out along the cooling channel 14 and the connecting pipe 23, the sprayed coolant is effectively captured by this arc area due to the high-speed rotation of the disc end mill 2. The coolant first impacts one side wall of the arc area, and then, under the combined action of centrifugal force and the flow channel shape, it is guided to impact the other side wall. This process repeats itself, and in a very short time, the sprayed coolant is continuously constrained and impacted within the arc area, eventually forming a stable and concentrated liquid flow that falls evenly onto the milling area and inserts 22 below. This design transforms the rotation of the tool from a factor that hinders cooling into an aid that promotes the uniform distribution of coolant and enhances the cooling effect, achieving efficient and dynamic cooling of the milling area and inserts 22.

[0049] Secondly, the mounting shaft 11 has two cooling channels 14 connected to external cooling pipes. On the outer wall of the disc milling cutter 2, between two adjacent inserts 22, several connecting pipes 23 connected to the aforementioned cooling channels 14 are also provided. During operation, high-pressure coolant enters the cooling channels 14 inside the mounting shaft 11 through the external pipes and is directly transported to the vicinity of the cutting area of ​​the milling cutter along these internal channels. Finally, the coolant is precisely sprayed out through the connecting pipes 23 on the outer wall of the disc milling cutter 2, directly acting on the insert 22 and the cutting area directly below it. This inside-out cooling method ensures that the coolant can directly and continuously act on the parts that need cooling the most, overcomes the negative impact of centrifugal force, achieves a sufficient and uniform cooling effect, effectively extends the tool life, and significantly reduces coolant consumption and production costs by avoiding splashing everywhere.

[0050] Thirdly, a single screwing action can simultaneously lock the disc end mill 2 in both axial and radial directions, greatly simplifying the installation process, improving replacement efficiency, and ensuring the tool's excellent stability during long-term machining. During installation, the operator first places the disc end mill 2 onto the mounting shaft 11, aligning its mating groove 24 with the through groove 112 on the mounting shaft 11. Simultaneously, the upper end face of the disc end mill 2 is pressed tightly against the stop plate 113. Then, the locking block 3 is screwed into the mounting shaft 11. During the screwing process, a dual locking effect is achieved: the first is axial locking, where the locking block 3, after being screwed in, directly presses against the lower end face of the disc end mill 2, cooperating with the stop plate 113 on the other side to limit the vertical movement of the disc end mill 2; the second is radial locking, where the adjusting block 31 on the locking block 3 preferentially enters the mounting shaft 11 and, through the opening... The connecting pipe 23 is limited on the side wall. As the locking block 3 rotates, the adjusting block 31, which is rotatably connected to the connecting block 32, moves along the connecting pipe 23. Through the cooperation of the adjusting groove and the chamfer on the clamping block 13, it pushes several clamping blocks 13 that are close to the center of the mounting shaft 11 in the initial state to move outward synchronously. When the clamping block 13 moves toward the inner wall of the disc milling cutter 2, several arc-shaped protrusions set on its arc-shaped outer wall will accurately enter the corresponding semi-circular grooves 25 on the inner wall of the disc milling cutter 2's mating groove 24, thereby achieving a stable radial clamping of the disc milling cutter 2. Through this installation step, the multi-directional clamping work in the axial and radial directions is completed simultaneously. This not only simplifies the installation process and improves the replacement efficiency of the disc milling cutter 2, but also effectively avoids the shaking problem caused by tooth wear after long-term machining, laying a solid foundation for subsequent high-precision and high-stability milling work.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A CNC machine tool milling cutter system based on dual cooling channels, characterized in that, include: The upper end of the tool holder (1) is pneumatically connected to the equipment, and the lower end of the tool holder (1) is fixedly provided with a mounting shaft (111) with a threaded groove (111) on the outer wall. A disc milling cutter (2) has a through hole (21) at its center. The through hole (21) passes through the mounting shaft (11) and is located on the outer circumference of the disc milling cutter (2) and is connected to several cutting tools (22) by threaded parts. Locking block (3), the locking block (3) is connected to the mounting shaft (11) by a threaded connection, and realizes the clamping and limiting work of the disc milling cutter (2); The mounting shaft (11) is provided with a cooling channel (14) connected to an external cooling pipe, and the outer wall of the disc milling cutter (2) and between two adjacent blades (22) are provided with several connecting pipes (23) connected to the corresponding cooling channels (14).

2. The CNC machine tool milling cutter system based on dual cooling channels according to claim 1, characterized in that: The bottom end of the mounting shaft (11) is provided with several through slots (112) along the circumferential direction. A baffle plate (113) is provided inside the several through slots (112). The baffle plate (113) is used to block the disc milling cutter (2).

3. A CNC machine tool milling cutter system based on dual cooling channels according to claim 2, characterized in that: The through groove (112) has sliding grooves (114) extending in the vertical direction on both side walls near the baffle plate (113). The sliding groove (114) has a linkage block (12) slidably arranged inside by a top pressure spring.

4. A CNC machine tool milling cutter system based on dual cooling channels according to claim 3, characterized in that: A clamping block (13) is provided between two linkage blocks (12) inside the same through slot (112). The clamping block (13) has a chamfer near the center of the baffle plate (113). In the initial state, the clamping block (13) is located on the side near the center of the baffle plate (113).

5. A CNC machine tool milling cutter system based on dual cooling channels according to claim 1, characterized in that: The disc milling cutter (2) has a mating groove (24) at the position corresponding to the through groove (112) at its center. The arc-shaped inner wall of the mating groove (24) has several semi-circular grooves (25) along its extension direction.

6. A CNC machine tool milling cutter system based on dual cooling channels according to claim 1, characterized in that: The inner circumference of the locking block (3) is provided with an adjusting block (31) located inside the mounting shaft (11) through several connecting blocks (32). The locking block (3) is rotatably connected to several connecting blocks (32). The side wall of the adjusting block (31) near the abutment block (13) is chamfered. In the initial state, the adjusting block (31) and the abutment block (13) are in a non-contact state.

7. A CNC machine tool milling cutter system based on dual cooling channels according to claim 6, characterized in that: The outer wall of the adjustment block (31) is provided with an annular plate (33), and the outer wall of the annular plate (33) is connected to a number of connecting blocks (32).

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