A cemented carbide cutting tool

Abstract

The present invention relates to the field of turning processing, and specifically provides a cemented carbide cutting tool, including a heat dissipation component arranged on a tool seat, the heat dissipation component including a crimping plate and a plurality of crimping rods arranged on the bottom surface of the crimping plate and extending deep into the tool seat, a first liquid channel is arranged in the crimping plate, and a second liquid channel connected to the first liquid channel is arranged in the crimping rod; a switching member corresponding to each crimping rod is arranged in the tool seat, one end of the switching member can cooperate with an end of the crimping rod away from the crimping plate, and a switching channel connected to the second liquid channel is arranged in the switching member; the switching member has a first state in which the switching channel is cut off from the tool liquid channel and a second state in which the switching channel is connected to the tool liquid channel; a driving mechanism for driving the heat dissipation component to move toward the tool seat is arranged on the fixed frame, and during the movement of the heat dissipation component, the second liquid channel is connected to the switching channel, and the crimping rod drives the switching member to switch from the first state to the second state; the present invention does not require frequent opening and closing of the liquid source, thereby achieving the continuity of the cutting operation.

Description

Technical Field

[0001] The invention relates to the field of turning, in particular to a cemented carbide cutting tool. Background Art

[0002] A cutting tool is a tool used for cutting in mechanical manufacturing. As is known to all, the cutting tool is prone to heat during the cutting process, and the cutting tool needs to be cooled in time. The existing heat dissipation method is usually to set a liquid channel in the tool holder of the cutting tool for cooling. For example, the specification with the announcement number CN219254165U discloses a special-shaped cutting tool for processing a bolt ring groove, which includes a cutting tool holder, a limiting groove is provided on the cutting tool holder, a cutting tool body is detachably connected to the limiting groove, a positioning bolt is inserted on the cutting tool body, a threaded hole is provided at the bottom of the limiting groove to be threadedly connected with the positioning bolt, a liquid inlet hole connected to the threaded hole is provided in the cutting tool holder, a guide ring is provided on the positioning bolt, a liquid outlet hole is provided on the guide ring, and a connecting channel for connecting the liquid outlet hole and the liquid inlet hole is provided in the positioning bolt.

[0003] Although the above scheme can ensure the cooling effect of the tool, the liquid source needs to be turned off to stop the liquid supply when the cutting operation is stopped, and the liquid source needs to be started to supply the liquid when the cutting operation is required. During the cutting process, the tool height needs to be continuously adjusted to meet various processing conditions, but each time the tool height is adjusted, the liquid source must be turned off first. This cutting operation method has poor continuity and is relatively inefficient.

[0004] In addition, the height adjustment of the existing tool requires the installation of a shim under the tool, and sometimes a combination of multiple shims of different thicknesses need to be installed to achieve the positioning installation of the turning tool, which is very inefficient. Summary of the invention

[0005] Based on this, it is necessary to provide a cemented carbide cutting tool that can realize liquid channel on-off regulation to address the current problem of poor cutting operation continuity caused by the need to frequently start and shut down the liquid source.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A cemented carbide cutting tool comprises a tool and a fixing frame for fixing the tool, the tool comprises a tool seat and a tool head fixed on the tool seat, and a tool fluid channel is arranged in the tool seat;

[0008] The cemented carbide cutting tool further comprises a heat dissipation assembly arranged on the tool holder, the heat dissipation assembly comprises a crimping plate and a plurality of crimping rods arranged on the bottom surface of the crimping plate and extending deep into the tool holder, a first liquid channel is arranged in the crimping plate, and a second liquid channel communicating with the first liquid channel is arranged in the crimping rod;

[0009] A switching member corresponding to each of the crimping rods is provided in the tool holder, one end of the switching member can cooperate with one end of the crimping rod away from the crimping plate, and a switching channel that can communicate with the second fluid channel is provided in the switching member; the switching member has a first state in which the switching channel is cut off from the tool fluid channel and a second state in which the switching channel is connected to the tool fluid channel;

[0010] The fixing frame is provided with a driving mechanism for driving the heat dissipation component to move toward the knife seat. During the movement of the heat dissipation component, the second liquid channel is connected to the switching channel, and the crimping rod drives the switching member to switch from the first state to the second state.

[0011] In this solution, a switching element with a changeable state is provided to realize the conduction and cutoff of the liquid channel. Even in non-cutting operations such as adjusting the tool height, there is no need to shut down the liquid source, thereby achieving the continuity of the cutting operation.

[0012] In one of the embodiments, a return spring is sleeved on the crimping rod, one end of which is against the crimping plate and the other end is against the knife seat. During the process in which the return spring drives the heat dissipation assembly to reset, the crimping rod drives the switching member to switch from the second state to the first state.

[0013] In this solution, the reset spring realizes the automatic reset of the crimping rod and the automatic shutoff of the liquid channel, which is convenient and quick.

[0014] In one of the embodiments, a spiral groove is provided on the top of the switching member, and a driving block capable of sliding in the spiral groove is provided at one end of the crimping rod that cooperates with the switching member.

[0015] In this solution, the driving block slides in the spiral groove, which can convert the linear motion of the crimping rod into the rotational motion of the switching member, and the switching channel and the tool fluid channel are cut off and connected through rotation. The mechanical structure is simple and the operation is reliable.

[0016] In one of the embodiments, it also includes an adjustment component for driving the tool to rise and fall, the adjustment component includes a moving inclined block with a moving inclined surface and an adjustment mechanism for driving the moving inclined block to move, the fixed frame is provided with a fixed inclined surface, and the moving inclined surface cooperates with the fixed inclined surface to support the tool holder.

[0017] This solution adjusts the height of the tool by adjusting the components, replacing the traditional method of adding gaskets. The operation is convenient and efficient, and the control accuracy is high.

[0018] In one of the embodiments, a guide and limiting mechanism is provided between the movable inclined surface, the fixed inclined surface and the tool holder.

[0019] In one embodiment, the movable inclined plane is symmetrical to the fixed inclined plane, and the guide and limiting mechanism adopts a dovetail groove guide rail slider mechanism.

[0020] In this solution, the dovetail groove guide rail slider mechanism can provide stable guidance, and the tool will not fall off the moving inclined plane and the fixed inclined plane.

[0021] In one embodiment, the crimping rod has two groups of parallel arrangements facing the movable inclined surface and the fixed inclined surface respectively, and limiting grooves are provided on the movable inclined surface and the fixed inclined surface. One end of the switching member away from the crimping rod passes through the knife seat and abuts against the inner bottom wall of the limiting groove.

[0022] In this solution, the two ends of the switching member are respectively abutted by the pressing rod and the inner bottom wall of the limiting groove, which can achieve effective limiting of the switching member to ensure that the liquid channel can be effectively conducted.

[0023] In one embodiment, the limiting grooves located on the movable inclined surface and the fixed inclined surface include a plurality of grooves arranged in parallel along the inclined direction, and when the switching member is in the first state, there is a gap between the end side wall of the switching member located in the limiting groove and the two side walls of the limiting groove in the width direction, and when the switching member is in the second state, the end side wall of the switching member located in the limiting groove contacts the two side walls of the limiting groove in the width direction.

[0024] In this solution, when the tool is adjusting its height, the switching member is in the first state, at which point there is a gap between the end of the switching member and the two side walls of the limiting groove, so that the switching member can be easily removed from the limiting groove. During the rising and falling process of the switching member, the end of the switching member will contact the side walls of the limiting groove, producing a prompting feel. When the tool is preparing to cut, the switching member is in the second state, at which point the end of the switching member contacts and abuts against the two side walls of the limiting groove, thereby achieving a locking effect.

[0025] In one of the embodiments, a tension spring for pulling the switching member is arranged in the knife seat.

[0026] In this solution, when the tool is adjusting its height, the switching member continuously jumps in various limit slots, and the tension spring is continuously compressed and relaxed, producing a sense of frustration, making it easier to identify the adjustment amount.

[0027] In one of the embodiments, a plurality of the cutting tools are disposed on the fixing frame, and the plurality of the cutting tools are rotationally symmetrical.

[0028] The beneficial effects of the present invention are:

[0029] 1. The tool of the present invention is provided with a switch member with a changeable state, which can rotate to realize the conduction and cutoff of the liquid channel. Even in non-cutting operations such as adjusting the tool height, there is no need to close the liquid source, thereby achieving the continuity of the cutting operation.

[0030] 2. The present invention is provided with two inclined blocks, one static and one dynamic, and both inclined blocks have notches that cooperate with the switching member, so that the fixed inclined block can disperse part of the force of the dynamic inclined block, thereby balancing the force exerted on the adjustment component and avoiding the reduction of the service life of the adjustment component due to uneven force.

[0031] 3. When adjusting the tool height, the present invention can utilize the end of the switching member to contact the side wall of the limit groove, and the action of the tension spring to allow the switching member to bounce in the limit groove, thereby providing a sense of frustration and facilitating the perception of the height adjustment process.

[0032] 4. After the tool is adjusted into place, the switching member of the present invention can be just stuck in the limit groove when driven to the second state by the crimping rod, playing a locking role to prevent the switching member from moving upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is an explosion schematic diagram of the present invention;

[0035] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0036] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0037] Figure 5 A top view of the present invention;

[0038] Figure 6 for Figure 5 Middle CC section cutaway view;

[0039] Figure 7 for Figure 6 Enlarged view of point E in the middle;

[0040] Figure 8 for Figure 5 Middle DD section cutaway view;

[0041] Fig. 9 for Figure 8 The enlarged view of F in the middle;

[0042] Fig.10 for Fig. 9 The second state diagram of

[0043] Fig.11 It is a front view of the tool of the present invention;

[0044] Fig.12 for Fig.11 Middle GG section cutaway view;

[0045] Fig.13 for Fig.11 Middle HH section cutaway view;

[0046] Fig.14 It is a structural schematic diagram of the switching element of the present invention;

[0047] Fig.15 It is a structural schematic diagram of the heat dissipation assembly of the present invention;

[0048] Fig.16 for Fig.15 The enlarged view of point I in the middle;

[0049] in:

[0050] 1-tool; 11-tool holder; 111-tool fluid channel; 112-dovetail groove; 12-tool head;

[0051] 2-heat dissipation assembly; 21-pressing plate; 211-first liquid channel; 2111-liquid inlet hole; 2112-liquid outlet hole; 22-pressing rod; 221-second liquid channel; 222-driving block; 23-reset spring;

[0052] 3-switching member; 31-switching channel; 32-spiral groove; 33-tension spring;

[0053] 4-adjustment assembly; 41-moving inclined block; 411-moving inclined plane; 4111-dovetail slider; 42-adjustment mechanism; 421-adjustment bolt; 422-top bolt;

[0054] 100-support body; 101-driving bolt; 102-fixing inclined plane; 1021-limiting groove;

[0055] 200-Base. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] like Figure 1-16 As shown, a cemented carbide cutting tool comprises a tool 1 and a fixing frame for fixing the tool 1 , wherein the tool 1 comprises a tool seat 11 and a tool head 12 fixed on the tool seat 11 , and a tool fluid channel 111 is arranged in the tool seat 11 .

[0060] The cemented carbide cutting tool also includes a heat dissipation component 2 arranged on the tool holder 11, the heat dissipation component 2 includes a crimping plate 21 and a plurality of crimping rods 22 arranged on the bottom surface of the crimping plate 21 and extending deep into the tool holder 11, a first liquid channel 211 is arranged in the crimping plate 21, and a second liquid channel 221 connected to the first liquid channel 211 is arranged in the crimping rod 22.

[0061] In this embodiment, the crimping rod 22 is integrally formed with the crimping plate 21. The crimping plate 21 is provided with a liquid inlet 2111 and a liquid outlet 2112 corresponding to the first liquid channel 211. The liquid inlet 2111 and the liquid outlet 2112 are used to connect to an external liquid source to provide circulating coolant. The crimping rod 22 is specifically a hollow tubular structure to form the second liquid channel 221.

[0062] A switching member 3 corresponding to each crimping rod 22 is provided in the tool holder 11, one end of the switching member 3 can cooperate with the end of the crimping rod 2 away from the crimping plate 21, and a switching channel 31 that can be connected to the second liquid channel 221 is provided in the switching member 3; the switching member 3 has a first state in which the switching channel 31 and the tool liquid channel 111 are cut off, and a second state in which the switching channel 31 and the tool liquid channel 111 are connected.

[0063] The fixing frame is provided with a driving mechanism for driving the heat dissipation assembly 2 to move toward the knife seat 11. During the movement of the heat dissipation assembly 2, the second liquid channel 221 is connected to the switching channel 31, and the crimping rod 22 drives the switching member 3 to switch from the first state to the second state.

[0064] In this embodiment, the crimping rod 22 can drive the switching member 3 to operate and switch from the first state to the second state. In the second state, the second liquid channel 221 is connected to the switching channel 31, and at the same time, the switching channel 31 is connected to the tool liquid channel 111, that is, the second liquid channel 221 and the tool liquid channel 111 are connected through the switching channel 31. In this state, the first liquid channel 211, the second liquid channel 221 and the tool liquid channel 111 constitute a passage, and the coolant can enter the tool liquid channel 111 to cool the tool 1.

[0065] In this embodiment, the fixing frame includes a support body 100 and a base 200, and the heat dissipation component 2 is arranged on the base 200. The driving mechanism specifically adopts a driving bolt 101 threadedly connected to the support body 100. The driving bolt 101 passes through the support body 100 and abuts against the heat dissipation component 2. The heat dissipation component 2 can be moved up and down by simply screwing the driving bolt 101. The heat dissipation component 2 is driven to move by the driving bolt 101, and then the switching member 3 is driven to move by the crimping rod 22 to realize the state switching.

[0066] In some other embodiments, such as Figure 1 and 2 As shown, a return spring 23 is sleeved on the crimping rod 22, one end of which abuts against the crimping plate 21 and the other end abuts against the knife seat 11. During the process of the return spring 23 driving the heat dissipation component 2 to reset, the crimping rod 22 drives the switching member 3 to switch from the second state to the first state.

[0067] In this embodiment, the driving bolt 101 compresses the reset spring 23 when driving the heat dissipation component 2 to move. When the driving bolt 101 is screwed in the opposite direction, the elastic force of the reset spring 23 is released to drive the heat dissipation component 2 to automatically reset. After resetting, the switching member 3 is in the first state, that is, the switching channel 31 and the tool fluid channel 111 are in a non-conducting state, and the first fluid channel 211, the second fluid channel 221 and the tool fluid channel 111 cannot form a passage.

[0068] In some other embodiments, such as Figure 14-16As shown, a spiral groove 32 is provided on the top of the switching member 3 , and a driving block 222 that can slide in the spiral groove 32 is provided on one end of the crimping rod 22 that cooperates with the switching member 3 .

[0069] The driving block 222 slides in the spiral groove 32, which can convert the linear motion of the crimping rod 22 into the rotational motion of the switching member 3, and realizes the cutoff and conduction of the switching channel 31 and the tool fluid channel 111 through rotation. The mechanical structure is simple and the operation is reliable. In this embodiment, the switching channel 31 of the switching member 3 includes a horizontal section for communicating with the tool fluid channel 111 and a vertical section for communicating with the second fluid channel 221; the rotation angle of the switching member 3 is specifically 90 degrees. In the first state, the horizontal section of the switching channel 31 is perpendicular to the axis of the tool fluid channel 111 to achieve cutoff. In the second state, the horizontal section of the switching channel 31 is coaxial with the tool fluid channel 111 to achieve conduction.

[0070] In some other embodiments, such as Figure 1 , 2 As shown in 9, the cemented carbide cutting tool also includes an adjusting component 4 for driving the tool 1 to rise and fall, the adjusting component 4 includes a moving inclined block 41 with a moving inclined surface 411 and an adjusting mechanism 42 for driving the moving inclined block 41 to move, the fixed frame is provided with a supporting platform, the supporting platform is provided with a fixed inclined surface 102, and the moving inclined surface 411 cooperates with the fixed inclined surface 102 to support the tool holder 11.

[0071] In this embodiment, the height of the tool 1 is adjusted by adjusting the component 4, instead of the traditional method of adding a gasket. The operation is convenient and efficient, and the control accuracy is high.

[0072] The adjustment assembly 4 specifically includes an adjustment bolt 421 and a top bolt 422 that threadedly connect the movable bevel block 41 to the base 200. The adjustment bolt 421 is specifically inserted from top to bottom, and the top bolt 422 is specifically inserted from bottom to top. The adjustment bolt 421 and the top bolt 422 are adjusted synchronously and jointly support the movable bevel block 41.

[0073] In some other embodiments, a guide and limiting mechanism is provided between the movable inclined surface 411 , the fixed inclined surface 102 and the tool holder 11 .

[0074] In this embodiment, the movable inclined plane 411 and the fixed inclined plane 102 are symmetrically arranged, specifically in a "V" shape, and the guide and limiting mechanism adopts a dovetail groove guide rail slider mechanism. Specifically, dovetail sliders 4111 extending along the inclined direction are respectively arranged at both ends of the movable inclined plane 411 and the fixed inclined plane 102, and dovetail grooves 112 matching the dovetail sliders 4111 are arranged at corresponding positions of the tool holder 11. The dovetail groove guide rail slider mechanism can provide stable guidance, and the tool 1 will not fall off from the movable inclined plane 411 and the fixed inclined plane 102.

[0075] In some other embodiments, the crimping rod 22 has two groups of parallel arrangements that are respectively opposite to the movable inclined surface 411 and the fixed inclined surface 102. A limiting groove 1021 is provided on the movable inclined surface 411 and the fixed inclined surface 102. One end of the switching member 3 away from the crimping rod 22 passes through the knife seat 11 and abuts against the inner bottom wall of the limiting groove 1021.

[0076] In this embodiment, the two ends of the switching member 3 are respectively abutted by the pressing rod 22 and the inner bottom wall of the limiting groove 1021, which can effectively limit the switching member 3 to ensure that the liquid channel can be effectively conducted.

[0077] In some other embodiments, the limiting grooves 1021 located on the movable inclined surface 411 and the fixed inclined surface 102 include multiple ones arranged in parallel along the inclined direction, and when the switching member 3 is in the first state, there is a gap between the end side wall of the switching member 3 located in the limiting groove 1021 and the two side walls of the limiting groove 1021 located in the width direction, and when the switching member 3 is in the second state, the end side wall of the switching member 3 located in the limiting groove 1021 is in contact with the two side walls of the limiting groove 1021 located in the width direction.

[0078] In this embodiment, the end of the switching member 3 has a symmetrical cutting surface. When the tool 1 is adjusting the height, the switching member 3 is in the first state. Fig.10 As shown, at this time, there is a gap between the end of the switching member 3 and the two side walls of the limiting groove 1021, so that it can be easily removed from the limiting groove 1021, and during the rising and falling process of the switching member 3, the end of the switching member 3 will contact the side wall of the limiting groove 1021, producing a prompt feeling. When the tool 1 is ready to cut, the switching member 3 is in the second state, such as Fig. 9 As shown, at this time, the end of the switching member 3 is in contact with the two side walls of the limiting groove 1021, thereby playing a locking role.

[0079] In some other embodiments, a tension spring 33 for pulling the switching member 3 is disposed in the knife seat 11 .

[0080] In this embodiment, a cavity for placing a tension spring 33 is provided in the knife seat 11, and the switching member 3 has a structure with a large diameter in the upper half and a small diameter in the lower half. The top of the tension spring 33 abuts against the upper half and is fixed, and the bottom of the tension spring abuts against the bottom wall of the cavity and is fixed, so as to pull the switching member 3; when the crimping rod 22 cooperates with the switching member 3, the crimping rod 22 is inserted into the upper half of the switching member 3 to complete the connection between the second liquid channel 221 and the switching channel 31. When the tool 1 is adjusted in height, the tension spring 33 is continuously stretched and relaxed, so that the switching member 3 will continuously jump in each limit groove 1021, generating a sense of frustration, which is convenient for identifying the adjustment amount.

[0081] In some other embodiments, such as Figure 1 and 2As shown, a plurality of knives 1 are arranged on the fixed frame, and the plurality of knives 1 are rotationally symmetrical. In this embodiment, four knives 1 are arranged, and two adjacent knives 1 are arranged at an angle of 90 degrees.

[0082] When the tool height needs to be adjusted, the adjusting bolt 421 and the top bolt 422 are screwed synchronously to drive the movable bevel block 41 to move, that is, to adjust the distance between the movable bevel block 41 and the base 200. Due to the existence of the upper limit groove 1021 on the movable bevel 411 and the fixed bevel 102, the end of the switching member 3 will be in continuous contact with the side wall of the limit groove 1021. At the same time, under the action of the continuous stretching and relaxation of the tension spring 33, the switching member 3 will continuously jump in each limit groove 1021, producing a sense of frustration, so as to facilitate the identification of the adjustment amount. At this time, the horizontal section of the switching channel 31 is perpendicular to the tool fluid channel 111, that is, the cut-off state.

[0083] When cutting operation is required after the height adjustment is completed, the driving bolt 101 is screwed to drive the heat dissipation component 2 to move downward. During the downward movement of the heat dissipation component 2, the crimping rod 22 is docked with the switching component 3, and the driving block 222 and the spiral groove 32 are used to cooperate to drive the switching component 3 to rotate. After rotating into place, the horizontal section of the switching channel 31 is coaxial with the tool liquid channel 111, that is, the conductive state. At this time, the coolant can enter the tool liquid channel 111 from the first liquid channel 211, the second liquid channel 221, and the switching channel 31 to circulate, thereby cooling the tool.

[0084] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A cemented carbide cutting tool, comprising a tool and a fixing frame for fixing the tool, wherein the tool comprises a tool holder and a tool head fixed on the tool holder, wherein a tool fluid channel is arranged in the tool holder, and wherein: The cemented carbide cutting tool further comprises a heat dissipation assembly arranged on the tool holder, the heat dissipation assembly comprises a crimping plate and a plurality of crimping rods arranged on the bottom surface of the crimping plate and extending deep into the tool holder, a first liquid channel is arranged in the crimping plate, and a second liquid channel communicating with the first liquid channel is arranged in the crimping rod; A switching member corresponding to each of the crimping rods is provided in the tool holder, one end of the switching member can cooperate with one end of the crimping rod away from the crimping plate, and a switching channel that can communicate with the second fluid channel is provided in the switching member; the switching member has a first state in which the switching channel is cut off from the tool fluid channel and a second state in which the switching channel is connected to the tool fluid channel; The fixing frame is provided with a driving mechanism for driving the heat dissipation component to move toward the knife seat. During the movement of the heat dissipation component, the second liquid channel is connected to the switching channel, and the crimping rod drives the switching member to switch from the first state to the second state.

2. The cemented carbide cutting tool according to claim 1, characterized in that: The crimping rod is sleeved with a return spring with one end abutting against the crimping plate and the other end abutting against the knife seat. During the process of the return spring driving the heat dissipation assembly to reset, the crimping rod drives the switching member to switch from the second state to the first state.

3. The cemented carbide cutting tool according to claim 1 or 2, characterized in that: A spiral groove is arranged on the top of the switching member, and a driving block which can slide in the spiral groove is arranged on one end of the pressing rod which cooperates with the switching member.

4. The cemented carbide cutting tool according to claim 1, characterized in that: It also includes an adjustment component for driving the tool to rise and fall, the adjustment component includes a moving inclined block with a moving inclined surface and an adjustment mechanism for driving the moving inclined block to move, the fixed frame is provided with a fixed inclined surface, and the moving inclined surface cooperates with the fixed inclined surface to support the tool holder.

5. The cemented carbide cutting tool according to claim 4, characterized in that: A guiding and limiting mechanism is arranged between the movable inclined surface, the fixed inclined surface and the knife seat.

6. The cemented carbide cutting tool according to claim 5, characterized in that: The movable inclined plane is symmetrically arranged with respect to the fixed inclined plane, and the guide limiting mechanism adopts a dovetail groove guide rail slider mechanism.

7. The cemented carbide cutting tool according to claim 4, characterized in that: The crimping rod has two groups which are arranged in parallel and respectively face the movable inclined surface and the fixed inclined surface. The movable inclined surface and the fixed inclined surface are both provided with limiting grooves. One end of the switching member away from the crimping rod passes through the knife seat and abuts against the inner bottom wall of the limiting groove.

8. The cemented carbide cutting tool according to claim 7, characterized in that: The limiting grooves located on the movable inclined surface and the fixed inclined surface include a plurality of grooves arranged in parallel along the inclined direction, and when the switching member is in the first state, there is a gap between the end side wall of the switching member located in the limiting groove and the two side walls of the limiting groove in the width direction, and when the switching member is in the second state, the end side wall of the switching member located in the limiting groove contacts the two side walls of the limiting groove in the width direction.

9. The cemented carbide cutting tool according to claim 8, characterized in that: A tension spring for pulling the switching member is arranged in the knife seat.

10. The cemented carbide cutting tool according to claim 1, characterized in that: A plurality of the cutting tools are arranged on the fixing frame, and the plurality of the cutting tools are rotationally symmetrical.

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