Cutting assembly and cutter

Abstract

The utility model is suitable for the technical field of mechanical drilling, and provides a cutting assembly and a cutter. The cutting assembly comprises a cutter bar, a cutter head and an elastic piece. A containing groove and a channel communicated with the containing groove are formed in the cutter bar, and the channel extends in the first direction; the tool bit comprises a main body part and a cutting part, the tool bit is arranged in the containing groove and can rotate between a first position and a second position, in the first position, the projection of the tool bit in the first direction falls into the projection of the tool bar in the first direction, and in the second position, the projection of the cutting part in the first direction extends out of the side wall of the tool bar; the elastic piece is connected with the tool bit and used for driving the tool bit to rotate towards the first position. The tool bit sealing channel is communicated with the opening of the containing groove, and the channel is used for being filled with fluid to abut against the tool bit so that the tool bit can rotate towards the second position. According to the technical scheme provided by the embodiment of the invention, the problem that a burr removing tool cannot effectively remove burrs in the related technology can be solved.

Description

Technical Field

[0001] This application relates to the field of machining, and particularly to a cutting assembly and a tool. Background Art

[0002] When making cross holes, intersection burrs are likely to form at the through position of the two holes. Currently, generally, a nylon brush is used to repeatedly brush to remove the burrs at the edge of the hole opening. However, this treatment method has low efficiency and great difficulty, and due to the insufficient strength of the nylon brush material, the cleaning effect on some stubborn or deep burrs is poor, and burr residues are likely to occur. Summary of the Utility Model

[0003] In view of this, embodiments of this application provide a cutting assembly and a tool, which solve the technical problem that the burr removal tool in the related art cannot effectively remove burrs.

[0004] An embodiment of the first aspect of this application provides a cutting assembly, including: a tool shank, a receiving groove and a channel communicating with the receiving groove are provided in the tool shank, the channel extends along a first direction, where the first direction is the length direction of the tool shank; a tool tip, the tool tip includes a main body part and a cutting part, the tool tip is disposed in the receiving groove and can rotate between a first position and a second position. In the first position, the projection of the tool tip along the first direction falls within the projection of the tool shank along the first direction. In the second position, the projection of the cutting part along the first direction extends out of the side wall of the tool shank; an elastic member, connected to the tool tip, the elastic member is used to drive the tool tip to rotate towards the first position; the opening of the channel communicating with the receiving groove is closed by the tool tip, and the channel is used to fill with fluid to hold the tool tip against it, so that the tool tip rotates towards the second position.

[0005] In the cutting assembly provided by the embodiment of this application, the tool tip is rotatably disposed in the receiving groove of the tool shank. Since a channel is provided in the tool shank and the tool tip is connected to the elastic member, by filling the channel with fluid and using the resilience of the elastic member, the rotation of the tool tip between the first position and the second position can be controlled. When the tool tip rotates to the first position, the tool tip does not protrude from the side wall of the tool shank, so that the cutting assembly can smoothly enter the flow channel and reach the position where the burrs are located. When the tool tip rotates between the first position and the second position, or when the tool tip rotates to the second position, the cutting part of the tool tip extends out of the side wall of the tool shank from the first notch, so that the cutting assembly can perform a cutting action and remove the burrs in the flow channel. The above cutting assembly can be applied to deep cavity flow channels and cross flow channels, and can quickly, accurately and effectively remove burrs, solving the problem of poor burr removal effect in the related art.

[0006] In some embodiments, the receiving groove includes a first notch located on the side wall of the tool shank. At the second position, the cutting portion extends out of the side wall of the tool shank through the first notch. In the above design, the cutting portion of the tool head can completely extend out of the side wall of the tool shank, so that the tool head can better abut against the burrs, which is beneficial to improving the burr removal effect.

[0007] In some embodiments, the tool shank includes a first end and a second end distributed in a first direction. The receiving groove is provided at the first end. The receiving groove further includes a second notch located on the end face of the first end, and the second notch communicates with the first notch. In the above design, by improving the notch structure of the receiving groove, it is beneficial to reduce the assembly difficulty of the tool head and is beneficial to timely discharging the burr debris generated by cutting.

[0008] In some embodiments, at the first position, the cutting portion at least partially extends out of the first end through the second notch; at the second position, one side surface of the tool head is flush with the end face of the first end. In the above design, the tool head is closer to the front end of the tool shank at the second position, further improving the flexibility and practicality of the cutting assembly. In addition, at the second position, the main body portion of the tool head is received in the receiving groove, and a good abutment is formed between the main body portion and the groove wall of the receiving groove, so that the groove wall of the receiving groove can bear part of the radial force generated during the cutting process of the tool head.

[0009] In some embodiments, the receiving groove further includes a third groove located on the side wall of the tool shank and opposite to the first notch, and the first notch and the third notch are distributed in a direction perpendicular to the first direction. In the above design, by improving the structure of the receiving groove, it is beneficial to further reduce the assembly difficulty of the tool head, and the tool head has a higher rotational freedom degree on the tool shank, a larger deflection angle and a larger movement space.

[0010] In some embodiments, a first mounting hole is provided on the tool shank, a second mounting hole opposite to the first mounting hole is provided on the main body portion, and the cutting assembly further includes a pin, and the pin is inserted through the first mounting hole and the second mounting hole to fix the tool head on the tool shank. In the above design, the connection stability between the pin and the tool shank and the tool head is relatively high. During the cutting process, the pin can bear greater axial and radial forces.

[0011] In some embodiments, the pin is in interference fit with the first mounting hole, and the tool head is sleeved on the pin with a clearance. In the above design, the elastic member and the fluid in the channel are only used to drive the rotation of the tool head, and the required driving force is smaller.

[0012] In some embodiments, the pin is inserted into the first mounting hole with a clearance, and the tool head is fixedly sleeved on the pin. In the above design, the tool head and the pin cannot rotate relative to each other, which can reduce the swing and vibration of the tool head during use, avoid excessive movement of the tool head, and is beneficial to improving the cutting accuracy.

[0013] In some embodiments, the accommodating groove includes a first groove wall, a first groove is provided on the first groove wall, the elastic member includes a compression spring provided in the first groove, one end of the compression spring abuts against the main body, and the deformation direction of the compression spring is parallel to the first direction. In the above design, the compression spring can provide a stable reset force, which helps the cutter head to quickly return to the set position after cutting, and the compression spring has a simple structure and is easy to maintain and replace.

[0014] In some embodiments, the elastic member includes a torsion spring, and the torsion spring is sleeved between the pin and the cutter head, or the torsion spring is sleeved between the pin and the cutter bar. In the above design, the torsion spring does not occupy the internal space of the cutter bar, the design is more compact, and the torsion spring is directly connected between the pin and the cutter head, which has higher stability.

[0015] In some embodiments, the cutting portion includes a first cutting surface, a second cutting surface, and a third cutting surface connected in sequence along a second direction, the angle between the first cutting surface and the second cutting surface is an obtuse angle, and the angle between the second cutting surface and the third cutting surface is an obtuse angle, wherein the second direction is the rotation direction of the cutter head. In the above design, the cutting portion of the cutter head is composed of multiple cutting surfaces, which can be used to remove burrs on complex curved surfaces, with better cutting accuracy and cutting effect.

[0016] In some embodiments, the cutting portion includes a plurality of blades spaced apart along a third direction, and a chip groove is formed between adjacent blades, wherein the third direction is perpendicular to the first direction. In the above design, the chip groove is provided between the blades, which can quickly discharge burrs and chips, thereby reducing the wear of the blades by the chips generated by cutting, and is suitable for continuous cutting or situations with a large number of burrs.

[0017] In some embodiments, the accommodating groove includes a second groove wall, the main body includes a supporting surface opposite to the cutting portion, the second groove wall and the supporting surface are both arc-shaped structures, and the supporting surface and the second groove wall are slidably matched. In the above design, the first groove wall and the supporting surface are designed to be arc-shaped, and the two can be slidably matched, which is also conducive to reducing the rotation resistance of the cutter head and reducing the wear caused by the rotation of the cutter head.

[0018] In some embodiments, a second groove opposite to the channel is provided on the main body, and the second groove closes the opening of the channel communicating with the accommodating groove. In the above design, by providing the second groove, the leakage risk of the fluid in the channel can be reduced.

[0019] In some embodiments, at the second position, the maximum length of the cutting portion extending from the side wall is 2 mm. In the above design, the overhang length of the cutter head at the second position is reasonable, the vibration generated during cutting is small, the stability is higher, and the overall rigidity of the cutter head is strong, which can better resist the cutting force and is not easy to deform and damage.

[0020] In some embodiments, the fluid is gas, and the inflation pressure is 0.4Mpa-0.7Mpa. In the above design, the pressure changes more rapidly when gas is filled in the channel, so that the cutter head can respond faster and reach the preset position, and the gas is less likely to cause pollution, easier to obtain, and has lower maintenance costs.

[0021] In some embodiments, the fluid is a liquid, and the filling pressure is 0.7Mpa-1Mpa. In the above design, the liquid has a good heat conduction effect, and while supporting the cutter head, it can also take away the heat generated during the cutting process.

[0022] In some embodiments, the cross section of the channel is circular, and the diameter of the channel is 1 mm-2 mm. In the above design, the channel structure is reasonable, the resistance of the fluid when flowing in the channel is small, and the fluid can quickly fill the channel.

[0023] An embodiment of the second aspect of the present application provides a tool, comprising a tool handle and a cutting assembly as in the first aspect, wherein a tool rod is mounted on the tool handle.

[0024] In some embodiments, the knife bar is rotatably connected to the knife handle. In the above design, the connection between the knife bar and the knife handle is reasonable and easy to use.

[0025] The tool provided in the embodiment of the present application improves the structure of the cutting component, specifically, by improving the assembly method of the cutter head and the cutter rod and adjusting the installation position of the cutter head on the cutter rod, and by providing structures such as accommodating grooves, elastic parts and channels on the cutter rod, so that the cutter head can rotate freely on the cutter rod, thereby enabling the tool to perform cutting actions in deep cavity flow channels and cross flow channels, and can quickly, accurately and effectively remove burrs in the flow channels, thereby solving the problem of poor burr removal effect in related technologies.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a schematic diagram of the structure of a cross flow channel;

[0029] Figure 2 is a schematic structural view of a cutting component provided by an embodiment of the present application;

[0030] Figure 3 is Figure 2 an exploded view of the shown cutting component;

[0031] Figure 4 is a schematic structural view of a cutting component provided by an embodiment of the present application, where the tool bit is in the first position;

[0032] Figure 5 is Figure 4 a side view of the shown cutting component;

[0033] Figure 6 is Figure 4 a bottom view of the shown cutting component;

[0034] Figure 7 is a schematic structural view of a cutting component provided by an embodiment of the present application, where the tool bit is in the second position;

[0035] Figure 8 is Figure 7 a sectional view of the shown cutting component;

[0036] Figure 9 is Figure 7 a side view of the shown cutting component;

[0037] Figure 10 is Figure 7 a bottom view of the shown cutting component;

[0038] Figure 11 is a schematic structural view of a tool bit provided by an embodiment of the present application;

[0039] Figure 12 is Figure 11 a front view of the shown tool bit;

[0040] Figure 13 is Figure 11 a bottom view of the shown tool bit;

[0041] Figure 14 is a schematic structural view of a tool bit provided by another embodiment of the present application;

[0042] Figure 15 is a schematic structural view of a tool provided by an embodiment of the present application.

[0043] The meanings of the marks in the figure are as follows:

[0044] 1000, tool; 100, cutting component; 200, tool handle;

[0045] 11. First channel; 12. Second channel; 13. Burr; 2. Tool shank; 21. First end; 22. Second end; 23. Receiving groove; 231. First notch; 232. Second notch; 233. First groove wall; 234. Second groove wall; 24. Channel; 25. First mounting hole; 26. First groove; 3. Tool tip; 31. Main body portion; 311. Contact surface; 32. Cutting portion; 321. First cutting surface; 322. Second cutting surface; 323. Third cutting surface; 324. Blade; 325. Chip removal groove; 33. Second mounting hole; 34. Second groove; 4. Elastic member; 5. Pin. Detailed implementation manner

[0046] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0048] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0049] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0051] In the description of the embodiments of the present application, the term "a plurality" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application 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. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0054] Burrs refer to the excess metal debris or tiny protrusions formed during metal cutting, drilling, milling, stamping and other processing processes due to incomplete cutting or extrusion of materials. Burrs not only affect the appearance quality of products, but also in some sealing structures, burrs will damage the flatness of the sealing surface, causing leakage problems, and burrs may cause a reduction in the strength of the surrounding materials. If the burrs break or fall off, it will also affect the structural stability and product service life.

[0055] At present, generally, the method of repeatedly brushing with a nylon brush is used to remove burrs, but this processing method has low efficiency, high difficulty, and due to the insufficient material strength of the nylon brush, the cleaning effect on some stubborn or deep burrs is poor, and burr residues are likely to occur.

[0056] In order to effectively remove burrs, the embodiments of the present application provide a cutting assembly, including a tool shank, a tool head and an elastic member. The tool head is rotatably arranged at one end of the tool shank. The cutting part of the tool head can extend relative to the tool shank to cut burrs, and the cutting part of the tool head can also retract relative to the tool shank to facilitate entry and exit from the flow channel and avoid accidentally damaging the flow channel. The elastic member connects the tool head and the tool shank to drive the tool head to rotate. The above cutting assembly can be applied to deep cavity flow channels and cross flow channels, and can quickly, accurately and effectively remove burrs, solving the problem of poor burr removal effect in the related art.

[0057] The cutting component disclosed in the embodiments of the present application can be used in castings and forgings of vehicles, spacecraft, medical devices, household appliances, precision machinery, and various other instruments. Spacecraft include airplanes, rockets, space shuttles, and spaceships, etc.; medical devices include surgical tools, diagnostic equipment, etc.; household appliances include air conditioners, refrigerators, dehumidifiers, etc.; precision machinery includes gears, bearings, valves, precision fittings, etc.

[0058] For the convenience of description, the embodiments of the present application are described by taking a vehicle as an example.

[0059] The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. In one new energy vehicle, the interior of the vehicle includes an electric drive system. The electric drive system includes components such as an electric motor, a power battery, an inverter, a reducer, and a control system. To ensure the reliability and efficient operation of the electric drive system, coolant channels, lubricating oil channels, and other flow channels are also configured in the electric drive system, and a coolant channel is also provided in the power battery. These flow channels are used for specific fluids to flow through to achieve functions such as cooling and lubrication. These flow channels are generally designed with a structure of deep cavity holes and cross holes. During the machining process, due to factors such as drill bit wear, too low cutting speed, and improper cutting angle, burrs are likely to be formed at the edge of the hole where the two holes penetrate.

[0060] Figure 1 It is a schematic diagram of a partial structure of a cross-flow channel at the cross position.

[0061] Please refer to Figure 1 , the cross-flow channel includes a first channel 11 and a second channel 12, and there is a burr 13 at the position where the two holes penetrate. The cutting component 100 provided in the embodiments of the present application can extend into the second channel 12 and cut the burr 13.

[0062] The following describes the technical solutions provided in the embodiments of the present application with reference to the accompanying drawings. Figure 2 It is a schematic structural diagram of a cutting component 100 provided in an embodiment of the present application; Figure 3 For Figure 2 the exploded view of the cutting component 100 shown; Figure 4 It is a schematic structural diagram of the cutting component 100 provided in an embodiment of the present application when the tool head 2 rotates to the first position; Figure 5 For Figure 4 the side view of the cutting component 100 shown; Figure 6 For Figure 4 the bottom view of the cutting component 100 shown; Figure 7 It is a schematic structural diagram of the cutting component 100 provided in an embodiment of the present application when the tool head 2 rotates to the second position; Figure 8 For Figure 7 the cross-sectional view of the cutting component 100 shown;Figure 9 is Figure 7 a side view of the cutting assembly 100 shown; Figure 10 is Figure 7 a bottom view of the cutting assembly 100 shown.

[0063] As Figure 4 shown, define the length direction of the tool shank 2 as the first direction X; As Figure 8 shown, define the rotation direction of the tool tip 3 as the second direction Y; As Figure 5 shown, define the length direction of the pin 5 as the third direction Z. The first direction X is perpendicular to the third direction Z.

[0064] Please refer to Figure 2 and Figure 3 , an embodiment of the first aspect of the present application provides a cutting assembly 100, including a tool shank 2, a tool tip 3 and an elastic member 4. Please refer to Figure 3 , Figure 4 and Figure 8 , a receiving groove 23 and a channel 24 communicating with the receiving groove 23 are provided in the tool shank 2, and the channel 24 extends along the first direction X. Please refer to Figure 2 and Figure 3 , the tool tip 3 includes a main body portion 31 and a cutting portion 32, the tool tip 3 is disposed in the receiving groove 23, and the tool tip 3 can rotate between a first position and a second position. Please refer to Figure 4 , Figure 5 and Figure 6 , in the first position, the projection of the tool tip 3 along the first direction X falls within the projection of the tool shank 2 along the first direction X, that is, the cutting portion 32 does not protrude from the side wall of the tool shank 2. Please refer to Figure 7 , Figure 9 and Figure 10 , in the second position, the projection of the cutting portion 32 along the first direction X protrudes from the side wall of the tool shank 2, that is, the cutting portion 32 extends out of the side wall of the tool shank 2. Please refer to Figure 3 and Figure 8 , the elastic member 4 is connected to the tool tip 3, and the elastic member 4 is used to drive the tool tip 3 to rotate towards the first position. The tool tip 3 closes the opening of the channel 24 communicating with the receiving groove 23, and the channel 24 is used to fill with fluid to support the tool tip 3 so that the tool tip 3 rotates towards the second position.

[0065] The tool shank 2 at least includes a main body section extending along the first direction X, and the main body section is a straight rod structure. In the first direction X, one end of the tool shank 2 is used to mount the tool head 3, and the other end is used to connect to the tool handle 200 or to connect to an extended tool shank. Among them, the tool head 3 is mounted at the front end of the tool shank 2. The front end of the tool shank 2 can extend into the flow channel, and the tool shank 2 can spin under the action of an external force. During the rotation of the tool shank 2, the rotational force can be transmitted to the tool head 3 to drive the tool head 3 to rotate synchronously. At the same time, the tool shank 2 can also bear the axial and radial forces during the cutting process. The tool shank 2 is generally a cylindrical structure and can be made of high-strength materials such as high-strength alloy, stainless steel, carbon steel, and titanium alloy to have good rigidity and stability. It can be understood that to ensure the normal use of the tool shank 2, it is required that the cross-sectional dimension of the tool shank 2 is smaller than the cross-sectional dimension of the flow channel to be processed, and the length of the tool shank 2 is greater than the length of the flow channel to be processed. In some cases, the tool shank 2 can also be designed into other structures besides the cylindrical shape. A receiving groove 23 is provided at the front end or a position near the front end of the tool shank 2, and a fixing structure for mounting the tool head 3 is configured in the receiving groove 23. The tool head 3 is rotatably arranged in the receiving groove 23 and is rotationally connected to the tool shank 2. Among them, to ensure that the tool head 3 can rotate normally, it is generally required that the inner surface of the receiving groove 23 is flat. A channel 24 is provided inside the tool shank 2, and the channel 24 is used to fill with fluid. The channel 24 can be a circular channel or other shaped channels, and the fluid can be gas or liquid. One end of the channel 24 is directly communicated with the receiving groove 23, and the main body portion 31 of the tool head 3 abuts against the opening of the channel 24 communicating with the receiving groove 23. When the pressure of the fluid filled in the channel 24 reaches the critical value, the fluid can hold the tool head 3 and cause the tool head 3 to rotate from the first position to the second position. When the tool head 3 rotates to the second position, the fluid can also be used to press against the tool head 3 to keep the tool head 3 in the second position.

[0066] The tool head 3 is used to remove burrs 13. Its main body portion 31 is connected to the tool shank 2 to fix the tool head 3 to the front end of the tool shank 2, and the cutting portion 32 is used to perform cutting actions. The cutting portion 32 can be designed into a ball head structure, a flat head structure, or other multi-edge curved surface structures to adapt to different processing requirements. The tool head 3 can be made of high-strength materials such as cemented carbide, high-speed steel, and ceramic materials to have high hardness and good wear resistance. The tool head 3 is rotatably arranged on the tool shank 2 and can rotate between the first position and the second position. Among them, the first position is the position of the tool head 3 in the natural state. When the tool head 3 is held in the first position, the tool shank 2 and the tool head 3 can move freely in the flow channel. When the tool head 3 is held between the first position and the second position, or held in the second position, cutting actions can be performed.

[0067] The elastic member 4 is disposed at the contact position between the tool shank 2 and the tool tip 3, and is used to apply pressure to the tool tip 3 so that the tool tip 3 can be maintained at the first position, or the tool tip 3 can rotate from the second position to the first position. It can be understood that the elastic member 4 and the fluid filled in the channel 24 are respectively used to drive the tool tip 3 to rotate towards the first position and the second position. When the acting force exerted by the elastic member 4 on the tool tip 3 is greater than the acting force exerted by the fluid filled in the channel 24 on the tool tip 3, the tool tip 3 is maintained at the first position; when the acting forces exerted by the elastic member 4 and the fluid filled in the channel 24 on the tool tip 3 offset each other, the tool tip 3 can be maintained at a position between the first position and the second position; when the acting force exerted by the elastic member 4 on the tool tip 3 is less than the acting force exerted by the fluid filled in the channel 24 on the tool tip 3, the tool tip 3 is maintained at the second position.

[0068] Taking Figure 1 the cross-channel structure in Figures 2 - 8 as an example, in combination with Figure 3 and Figure 4 , the specific usage method of the cutting assembly 100 is as follows: First, please refer to Figure 7 and Figure 8 . The elastic member 4 is in a released state and abuts against the tool tip 3, so that the tool tip 3 is maintained at the first position. At this time, the cutting part 32 of the tool tip 3 does not protrude from the side wall of the tool shank 2, and the operator can insert the front end of the tool shank 2 into the second channel 12 and send the tool tip 13 to the through position of the first channel 11 and the second channel 12; then, please refer to Figure 7 and Figure 8 . Fluid is filled into the channel 24, and the fluid presses against the surface of the tool tip 3 and drives the tool tip 3 to rotate from the first position to the second position. The cutting part 32 of the tool tip 3 gradually protrudes from the side wall of the tool shank 2; then, please continue to refer to Figure 7 and Figure 8 . When the tool tip 3 rotates to the second position, the elastic member 4 is in a compressed state, and the cutting part 32 of the tool tip 3 completely protrudes from the side wall of the tool shank 2, and the cutting part 32 can abut against the burr 13; then, drive the tool shank 2 to spin around the first direction X. When the tool shank 2 rotates, it drives the tool tip 3 to rotate together, and the rotation path of the cutting part 32 of the tool tip 3 surrounds the orifice edge of the second channel 12, and the cutting part 32 can remove the burr 13; then, please continue to refer to Figure 3 and Figure 4 . After cutting is completed, the fluid in the channel 24 is discharged. At this time, the elastic member 4 rebounds and drives the tool tip 3 to rotate back to the first position. At this time, the tool shank 2 and the tool tip 3 can be withdrawn from the channel. It can be understood that after cutting is completed, generally, gas or liquid needs to be filled into the channel to flush out the cut burr debris.

[0069] In the above embodiments, the cutter head 3 is rotatably disposed in the receiving groove 23 of the cutter bar 2. Since the channel 24 is provided in the cutter bar 2 and the cutter head 3 is connected to the elastic member 4, by filling the fluid in the channel 24 and using the resilience of the elastic member 4, the rotation of the cutter head 3 between the first position and the second position can be controlled. When the cutter head 3 rotates to the first position, the cutter head 3 does not protrude from the side wall of the cutter bar 2, so that the cutting assembly 100 can smoothly enter the flow channel and reach the position where the burr 13 is located. When the cutter head 3 rotates between the first position and the second position, or when the cutter head 3 rotates to the second position, the cutting portion 32 of the cutter head 3 extends out of the side wall of the cutter bar 2 from the first notch 231, so that the cutting assembly 100 can perform a cutting action and remove the burr 13 in the flow channel. The above cutting assembly 100 can be applied to deep cavity flow channels and cross flow channels, and can quickly, accurately and effectively remove the burr 13, solving the problem of poor burr removal effect in the related art.

[0070] For the cutting assembly 100 provided in the embodiment of the present application, the design of the receiving groove 23 on the cutter bar 2 is not unique.

[0071] In some embodiments, the receiving groove 23 includes a first notch 231 located on the side wall of the cutter bar 2. In the second position, the cutting portion 32 extends out of the side wall of the cutter bar 2 through the first notch 231.

[0072] The receiving groove 23 is located at a position close to the front end of the cutter bar 2. The end face structure of the front end of the cutter bar 2 is complete, and only the first notch 231 is reserved on the side wall of the cutter bar 2.

[0073] With the above design, when the cutter head 2 rotates to the second position, the cutting portion 32 of the cutter head 2 completely extends out of the side wall of the cutter bar 2, so that the cutter head 2 can better abut against the burr, which is beneficial to improving the burr removal effect. In addition, when the cutter head 3 is in the first position, the main body portion 31 and the cutting portion 32 are completely received in the receiving groove 23, and during the rotation of the cutter head 3, the cutting portion 32 does not extend out of the first end of the cutter bar 2, so as to prevent the cutting portion 32 from accidentally injuring the inner wall of the flow channel.

[0074] In some embodiments, please refer to Figure 3 and Figure 4 , the cutter bar 2 includes a first end 21 and a second end 22 distributed along the first direction X. The receiving groove 23 is provided at the first end 21. The receiving groove 23 includes a first notch 231 located on the side wall of the cutter bar 2, and further includes a second notch 232 located on the end face of the first end 21. The second notch 232 is communicated with the first notch 231.

[0075] The receiving groove 23 is directly arranged on the end face of the first end 21, and its notch extends from the end face of the first end 21 to the side wall of the tool shank 2. In this way, the cutting head 3 can be assembled through the first notch 231 or the second notch 232, which is beneficial to reducing the assembly difficulty of the cutting head 3. In addition, this notch design is also beneficial to timely discharging the burr debris generated by cutting.

[0076] In some embodiments, the receiving groove 23 further includes a third notch located on the side wall of the tool shank 2 and opposite to the first notch 231. The first notch 231 and the third notch are distributed in a direction perpendicular to the first direction X, and the first notch 231, the second notch 232 and the third notch are connected. That is, at the first end 21 of the tool shank 2, two opposite extended side walls are reserved to install the cutting head 3.

[0077] In this way, the assembly difficulty between the cutting head 3 and the tool shank 2 can be further reduced, and the cutting head 3 has a higher degree of freedom of rotation on the tool shank 2, a larger deflection angle and a larger movement space.

[0078] In some embodiments, please refer to Figure 2 and Figure 7 , the receiving groove 23 has a first notch 231 and a second notch 232. In the first position, at least a part of the cutting part 32 extends out of the first end 21 of the tool shank 2 through the second notch 232. In the second position, one side face of the cutting head 3 is flush with the end face of the first end 21.

[0079] Specifically, when the cutting head 3 rotates between the first position and the second position, the cutting part 32 extends out of the tool shank 2 through the first notch 231 and / or the second notch 232. Please refer to Figure 7 , when the cutting head 3 rotates to the second position, the side face of the cutting head 3 far from the second end 22 is flush with the end face of the first end 21.

[0080] In some cases, the apertures of the first channel 11 and the second channel 12 of the cross-flow channel are relatively small, for example, the diameter may be only 6 mm or 8 mm. When the cutting assembly 100 extends into the channel, the operating space left for the cutting head 3 is small. With the above design, the assembly position of the cutting head 3 on the tool shank 2 is close to the first end 21, and the cutting head 3 is not likely to contact the inner wall of the channel during cutting, so that the cutting action can be better performed and the channel can be avoided from being damaged. And at the second position, the main body part 31 of the cutting head 3 is received in the receiving groove 23, and a good contact is formed between the main body part 31 and the groove wall of the receiving groove 23. In this way, the groove wall of the receiving groove 23 can bear part of the radial force generated during the cutting of the cutting head 3, thereby improving the reliability of the cutting assembly 100.

[0081] In some embodiments, please refer to Figure 2 and Figure 3, a first mounting hole 25 is provided on the tool shank 2, a second mounting hole 33 opposite to the first mounting hole 25 is provided on the main body portion 31, the cutting assembly 100 further includes a pin 5, and the pin 5 passes through the first mounting hole 25 and the second mounting hole 33 to fix the cutting head 3 on the tool shank 2. In this embodiment, the extending direction of the pin is defined as the third direction Z.

[0082] Please refer to Figure 7 and Figure 8 , along a radial direction of the tool shank 2, the tool shank 2 has fixing portions on opposite sides of the receiving groove 23, and opposite first mounting holes 25 are provided on the fixing portions. A second mounting hole 33 penetrating the main body portion 31 is provided on the main body portion 31 of the cutting head 3. The pin 5 sequentially passes through the first mounting hole 25 on the tool shank 2 and the second mounting hole 33 on the cutting head 3.

[0083] With the above design, the connection stability between the pin 5 and the tool shank 2 is high. During the cutting process, the pin 5 and the cutting head 3 are not easily detached from the tool shank 2, and the pin 5 can bear greater axial and radial forces, with higher reliability.

[0084] It can be understood that in some embodiments, a first mounting hole 25 can be provided on the tool shank 2, a blind hole opposite to the first mounting hole 25 can be provided on the main body portion 31 of the cutting head 3, and a positioning pin can be inserted from the outside of the tool shank 2 to fix the cutting head 3; alternatively, a cylindrical mounting block can also be provided on the tool shank 2, a blind hole or a through hole opposite to the mounting block and for inserting the mounting block can be provided on the main body portion 31 of the cutting head 3, and the mounting block can be aligned and installed with the blind hole or the through hole on the cutting head 3 to fix the cutting head 3.

[0085] When the cutting assembly 100 provided by the embodiment of the present application uses the pin 5 to fix the cutting head 3, the assembly method of the pin 5 and the cutting head 3 is not unique.

[0086] In some embodiments, the pin 5 is in interference fit with the first mounting hole 25, and the cutting head 3 is sleeved on the pin 5 with a clearance.

[0087] The pin 5 is in interference fit with the tool shank 2, so that the pin 5 is non-rotatable relative to the tool shank 2. The cutting head 3 is in clearance fit with the pin 5, so that the cutting head 3 can rotate relative to the pin 5 and the tool shank 2.

[0088] With the above design, on the one hand, the connection between the pin 5, the cutting head 3 and the tool shank 2 is more stable. During the cutting process, the pin 5 and the cutting head 3 are not easily detached from the tool shank 2. On the other hand, this design allows the cutting head 3 to move slightly on the pin 5, which can improve the adaptability of the cutting head 3, so as to better remove the burr 13. On the other hand, the elastic member 4 and the fluid in the channel 24 are only used to drive the cutting head 3 to rotate, and the required driving force is smaller.

[0089] In some embodiments, the pin 5 is inserted into the first mounting hole 25 with a clearance, and the cutting head 3 is fixedly sleeved on the pin 5.

[0090] The pin 5 is in clearance fit with the tool shank 2, and both the pin 5 and the cutting head 3 can rotate relative to the tool shank 2. On the surface of the pin 5 and the inner surface of the second mounting hole 33, there are provided mating threads, key grooves or other limiting structures to ensure that the pin 5 and the cutting head 3 cannot rotate relative to each other.

[0091] With the above design, the swing and vibration of the cutting head 3 during the cutting process can be reduced, and the excessive movement of the cutting head 3 can be avoided, which is beneficial to improving the cutting accuracy.

[0092] It can be understood that to ensure the normal rotation of the cutting head 3, in the length direction of the pin 5, the size of the cutting head 3 should be slightly smaller than the size of the receiving groove 23, so as to leave a gap between the cutting head 3 and the side wall of the receiving groove 23.

[0093] In the cutting assembly 100 provided by the embodiments of the present application, the type and assembly position of the elastic member 4 are not unique.

[0094] In some embodiments, please refer to Figure 3 and Figure 8 , the receiving groove 23 includes a first groove wall 233, a first groove 26 is provided on the first groove wall 233, the elastic member 4 includes a compression spring disposed in the first groove 26, and the deformation direction of the compression spring is parallel to the first direction X. Among them, the first groove wall 233 is the groove wall in the receiving groove 23 far from the first end 21.

[0095] The cutting head 3 is fixed to the tool shank 2 through the pin 5. A second mounting hole 33 is provided on the main body portion 31 of the cutting head 3. In the radial direction of the tool shank 2, the channel 24 in the tool shank 2 and the first groove 26 are disposed on opposite sides of the second mounting hole 33. Optionally, the second mounting hole 33 can be disposed at a position biased away from the cutting portion 32. The eccentric structure design is to ensure that the compression spring and the fluid in the channel 24 can normally drive the cutting head 3 to rotate on both sides of the rotation axis of the cutting head 3, so that the cutting head can be adjusted to the first position and the second position as expected.

[0096] The compression spring is installed in the first groove 26, one end abuts against the bottom of the first groove 26, and the other end extends out of the first groove 26 and abuts against the main body portion 31 of the cutting head 3. The end of the compression spring can directly abut against the cutting head 3, or a gasket adapted to the shape of the cutting head 3 can be assembled at the end of the compression spring, and the compression spring indirectly abuts against the cutting head 3 through the gasket. The compression stroke of the compression spring can be adjusted according to actual needs.

[0097] When the pressure provided by the fluid in the channel 24 is greater than the pressure provided by the compression spring, the cutting head 3 rotates from the first position to the second position. As the cutting head 3 rotates, the compression spring is compressed and stores potential energy. After cutting is completed, the fluid in the channel 24 is discharged to relieve pressure. When the pressure provided by the fluid in the channel 24 is lower than the pressure of the compression spring, the compression spring rebounds to release energy and drives the cutting head 3 to rotate from the second position to the first position.

[0098] With the above design, the compression spring can provide a stable restoring force, which helps the cutting head 3 to quickly return to the set position after cutting. Moreover, the compression spring has a simple structure and is easy to maintain and replace.

[0099] In some embodiments, the elastic member 4 includes a torsion spring. The torsion spring is sleeved between the pin 5 and the cutting head 3, or the torsion spring is sleeved between the pin 5 and the tool bar 2.

[0100] Optionally, in a specific embodiment, the pin 5 and the tool bar 2 are in interference fit, and the pin 5 and the cutting head 3 are in clearance fit. A torsion spring is assembled between the pin 5 and the cutting head 3. One end of the torsion spring is fixedly connected to the pin 5, and the other end is fixedly connected to the cutting head 3.

[0101] The torsion spring can be a helical spring directly wound around the pin 5 or a specially made flat torsion spring.

[0102] When the pressure provided by the fluid in the channel 24 is greater than the torsional force provided by the torsion spring, the cutting head 3 rotates from the first position to the second position. As the cutting head 3 rotates, the torsion spring deforms and stores potential energy. After cutting is completed, the fluid in the channel 24 is discharged to relieve pressure. When the pressure provided by the fluid in the channel 24 is lower than the torsional force of the torsion spring, the torsion spring restores to release energy and drives the cutting head 3 to rotate from the second position to the first position.

[0103] With the above design, the torsion spring does not occupy the internal space of the tool bar 2, and there is no need to open the first groove 26, so the design is more compact. Moreover, the torsion spring is directly connected between the pin 5 and the cutting head 3, and the stability is higher.

[0104] It can be understood that in some embodiments, the elastic member 4 can include both a compression spring and a torsion spring at the same time, or the elastic member 4 can also be a gas-liquid spring assembled in the accommodating groove 23, a rubber pad with good resilience and other structures.

[0105] In the cutting assembly 100 provided by the embodiment of the present application, the cutting portion 32 of the cutting head 3 performs the cutting action. The structure of the cutting portion 32 directly affects the cutting efficiency and cutting effect, and the design of the cutting portion 32 is not unique.

[0106] Figure 11 It is a schematic structural diagram of the cutting head 3 provided by an embodiment of the present application; Figure 12 ForFigure 11 Front view of the cutting head 3 shown Figure 12 is Figure 11 Bottom view of the cutting head 3 shown Figure 14 Schematic structural diagram of the cutting head 3 provided by another embodiment of the present application

[0107] In some embodiments, please refer to Figure 11 and Figure 12 , the cutting portion 32 includes a first cutting surface 321, a second cutting surface 322, and a third cutting surface 323 that are sequentially connected along the second direction Y. The included angle between the first cutting surface 321 and the second cutting surface 322 is an obtuse angle, and the included angle between the second cutting surface 322 and the third cutting surface 323 is an obtuse angle

[0108] The first cutting surface 321 and the third cutting surface 323 are respectively arranged on opposite sides of the second cutting surface 322. Please refer to Figure 12 , the first cutting surface 321 and the third cutting surface 323 may be symmetrically arranged relative to the second cutting surface 322, or, please refer to Figure 14 , the first cutting surface 321 and the third cutting surface 323 may be designed as an asymmetric structure relative to the second cutting surface 322

[0109] At the connection positions between the first cutting surface 321 and the second cutting surface 322, and between the second cutting surface 322 and the third cutting surface 323, an arc-shaped chamfer may be designed, or it may be designed as a sharp angle. The first cutting surface 321, the second cutting surface 322, and the third cutting surface 323 may be a planar structure or a curved surface structure, where the plane or the curved surface refers to the shape of the cutting surface in the rotation direction of the cutting head 3

[0110] The included angle between the first cutting surface 321 and the second cutting surface 322 may be 100° - 140°, and the included angle between the second cutting surface 322 and the third cutting surface 323 may be 100° - 140°. Optionally, in a specific embodiment, the included angle between the first cutting surface 321 and the second cutting surface 322, and the included angle between the second cutting surface 322 and the third cutting surface 323 are both 120°. The first cutting surface 321 and the third cutting surface 323 are of planar structure, the second cutting surface 322 is of curved surface structure, and the second cutting surface 322 protrudes toward the side away from the main body portion 31

[0111] With the above design, the cutting portion 32 of the cutting head 3 is composed of multiple cutting surfaces, and can be used to remove the burrs 13 on complex curved surfaces, with better cutting accuracy and cutting effect

[0112] In some embodiments, the cutting portion 32 is a ball head structure, and the front end of the cutting portion 32 is hemispherical, suitable for cutting burrs with a smaller area

[0113] With the above design, when the cutter head 3 performs a cutting action, the top end of the cutting part 32 (i.e., the front end of the ball head) abuts against the burr 13, and the bottom of the cutting part 32 (i.e., the position connecting the main body part 31) contacts the inner wall of the flow channel less, thereby reducing the risk of the cutting part 32 accidentally damaging the inner wall of the flow channel.

[0114] In some embodiments, the cutting part 32 has a flat head structure, and the front end of the cutting part 32 is a plane, which is suitable for cutting burrs with a large area.

[0115] With the above design, the cutter head 3 has a simple structure and is easy to process and manufacture.

[0116] In some embodiments, please refer to Figure 11 and Figure 13 , the cutting part 32 includes a plurality of blades 324 arranged at intervals along the third direction Z, and a chip discharge groove 325 is formed between adjacent blades 324.

[0117] Optionally, in a specific embodiment, the cutting part 32 includes three blades 324 arranged at intervals along the third direction Z, and two chip discharge grooves 325 are formed between the three blades 324.

[0118] With the above design, on the one hand, each blade 324 is independently arranged, and by increasing the number of cutting edges participating in cutting, the cutting effect can be improved. On the other hand, the chip discharge groove 325 is arranged between the blades 324, and the debris of the burr 13 can be quickly discharged, thereby reducing the wear of the blades 324 caused by the chips generated during cutting, and is applicable to continuous cutting or the case where there are many burrs 13.

[0119] In some embodiments, the cutting part 32 includes a blade 324, and the blade 324 has a forward cutting edge and / or a reverse cutting edge.

[0120] Optionally, in a specific embodiment, the cutting part 32 includes a plurality of blades 324, and each of the plurality of blades 324 has a forward cutting edge and a reverse cutting edge. In the distribution direction of the plurality of blades 324, the forward cutting edge and the reverse cutting edge are respectively arranged on opposite sides of the blade 324.

[0121] When performing a cutting action, the tool bar 2 can drive the cutter head 3 to rotate forward or backward, so that the burr 13 can be removed from different directions, significantly improving the cutting speed and processing efficiency. In some cases, the forward cutting edge and the reverse cutting edge are used alternately, which can also reduce the burden on the single-sided cutting edge, thereby prolonging the service life of the cutter head 3.

[0122] The forward rotation and reverse rotation of the above tool bar 2 can also be understood as clockwise rotation and counterclockwise rotation.

[0123] It can be understood that in some embodiments, to ensure the strength of the cutting portion 32, a cutting edge may not be provided on the blade 324, and the burr 13 is directly cut by the acting force generated by the rotation of the cutter head 3.

[0124] In some embodiments, please refer to Figure 10 , at the second position, the maximum value of the length d of the cutting portion 32 extending out of the side wall is 2 mm.

[0125] For example, the length d of the cutting portion 32 extending out of the side wall can be 1 mm, 1.5 mm, 2 mm.

[0126] Optionally, in a specific embodiment, at the second position, the maximum value of the length d of the cutting portion 32 extending out of the side wall is 1 mm.

[0127] With the above design, on the one hand, the overhang length of the cutter head 3 at the second position is reasonable, the vibration generated during cutting is small, and the stability is higher. On the other hand, the overall rigidity of the cutter head 3 is strong, it can better resist the cutting force and is not easily deformed or damaged.

[0128] It can be understood that the cutter head 3 can also perform a cutting action between the first position and the second position, and according to the different set positions of the cutter head 3, the cutter head 3 has different cutting capabilities and can be used to cut the burrs 13 at different parts. The first position and the second position are the limit positions of the cutter head 3. Which position the cutter head 3 specifically stays at depends on the elastic member 4 and the inflation or liquid filling pressure in the channel 24.

[0129] In some embodiments, please refer to Figure 3 , Figure 8 and Figure 12 , the receiving groove 23 includes a second groove wall 234, the main body portion 31 includes a resisting surface 311 opposite to the cutting portion 32, both the second groove wall 234 and the resisting surface 311 are arc-shaped structures, and the resisting surface 311 is in sliding fit with the second groove wall 234.

[0130] The second groove wall 234 is opposite to the first groove opening 231. The second groove wall 234 and the resisting surface 311 are designed as matching semi-circular structures, and the surfaces of the second groove wall 234 and the resisting surface 311 are flat and smooth. When the cutter head 3 rotates between the first position and the second position, the resisting surface 311 abuts against the second groove wall 234 and is in sliding fit with the first groove wall 233.

[0131] With the above design, on the one hand, the second groove wall 234 abuts against the abutting surface 311, which can limit the maximum angle of rotation of the elastic member 4 pushing the cutter head 3, so that the cutter head 3 can be stably maintained in the first position; on the other hand, the second groove wall 234 and the abutting surface 311 are arranged in close contact with each other, which can improve the contact tightness between the cutter head 3 and the accommodating groove 23, which helps to reduce the leakage of the fluid in the channel 24; on the other hand, the first groove wall 233 and the abutting surface 311 are designed to be arc-shaped, and the two can be slidably matched, which is also conducive to reducing the rotation resistance of the cutter head 3 and reducing the wear caused by the rotation of the cutter head 3.

[0132] It is understandable that in some embodiments, a third slot can be designed at a position opposite to the first slot 231, or the second slot wall 234 can be designed as a planar structure, and a gap is reserved between the main body 31 of the cutter head 3 and the second slot wall 234 for the cutter head 3 to rotate.

[0133] In some embodiments, please refer to Figure 8 and Figure 13 A second groove 34 opposite to the channel 24 is provided on the main body 31 , and the second groove 34 closes the opening of the channel 24 communicating with the accommodating groove 23 .

[0134] A second groove 34 is designed on the surface of the main body 31 . The size of the second groove 34 is larger than the cross-sectional size of the channel 24 . During the rotation of the cutter head 3 , the channel 24 is aligned with different positions of the second groove 34 .

[0135] The channel 24 in the tool rod 2 is used to fill with fluid to support the tool head 3. Since the tool head 3 and the tool rod 2 are independent workpieces, and to ensure the normal rotation of the tool head 3, there is generally a gap between the tool head 3 and the groove wall of the accommodating groove 23, and the existence of the gap may cause fluid leakage. By setting a second groove 34, the risk of leakage of the fluid in the channel 24 can be reduced, so that the channel 24 and the fluid filled therein can function normally.

[0136] In the cutting assembly 100 provided in the embodiment of the present application, a channel 24 is provided in the cutter head 3, and the channel 24 is used to fill with fluid, and the type of the fluid is not unique.

[0137] In some embodiments, the fluid is gas, and the inflation pressure is 0.4 MPa-0.7 MPa.

[0138] For example, the inflation pressure may be 0.4 MPa, 0.5 MPa, 0.6 MPa, or 0.7 MPa. The gas may be compressed air, nitrogen, or other inert gas.

[0139] Optionally, in a specific embodiment, the channel 24 is filled with compressed air, and the inflation pressure is 0.4 MPa.

[0140] On the one hand, by filling the channel 24 with gas, the pressure change is more rapid, so that the tool head 3 can respond faster and reach the preset position; on the other hand, gas is not easy to cause pollution, is more easily obtained, and has lower maintenance costs.

[0141] In some embodiments, the fluid is a liquid, and the filling hydraulic pressure is 0.7 Mpa - 1 Mpa.

[0142] Exemplarily, the filling hydraulic pressure can be 0.7 Mpa, 0.8 Mpa, 0.9 Mpa, 1 Mpa. The liquid can be water, oil or a special lubricating liquid.

[0143] Optionally, in a specific embodiment, water is filled in the channel 24, and the filling hydraulic pressure is 0.7 Mpa.

[0144] On the one hand, the liquid has a good heat conduction effect. While holding the tool head 3, it can also take away the heat generated during the cutting process; on the other hand, some specific liquids also have a lubricating effect. The flow of the liquid towards the tool head 3 can reduce the friction between the tool head 3 and the tool shank 2 during rotation and reduce the wear between workpieces.

[0145] It should be noted that the physical properties of liquids and gases are different. The density of liquids is generally greater than that of gases and they are almost incompressible. Therefore, under the same conditions, liquids need to provide a higher pressure to drive the tool head 3 to rotate. The filling gas pressure and filling hydraulic pressure in the channel 24 need to be designed with reference to the structure of the tool head 3 and the elastic member 4 to ensure that the tool head 3 can be smoothly driven to rotate without damaging the tool head 3 and the elastic member 4.

[0146] In some embodiments, the cross-section of the channel 24 is circular, and the diameter of the channel 24 is 1 mm - 2 mm.

[0147] Exemplarily, the diameter of the channel 24 can be 1 mm, 1.5 mm, 2 mm.

[0148] Optionally, in a specific embodiment, the channel 24 is a circular channel, and the diameter of the channel 24 is 1 mm.

[0149] With the above design, on the one hand, the structure of the channel 24 is reasonable, the resistance of the fluid flowing in the channel 24 is small, and the fluid can quickly fill the channel 24; on the other hand, there is good contact between the channel 24 and the tool head 3, and the tool head 3 is evenly pressed during rotation.

[0150] It can be understood that in some embodiments, the channel 24 can also be designed as a square, oval or other special-shaped structures, and the specific design can refer to the structures of the tool shank 2 and the tool head 3.

[0151] An embodiment of the present application provides a cutting assembly 100, which includes a tool shank 2, a tool tip 3, and an elastic member 4. The tool shank 2 includes a first end 21 and a second end 22 distributed along a first direction X. A receiving groove 23 is provided at the first end 21. The receiving groove 23 includes a first notch 231 on the side wall of the tool shank 2 and a second notch 232 on the end face of the first end 21. The first notch 231 and the second notch 232 are connected and communicated. The receiving groove 23 further includes a first groove wall 233 opposite to the second notch 232 and a second groove wall 234 opposite to the first notch 231. A first groove 26 is provided on the first groove wall 233. A channel 24 communicating the receiving groove 23 with the second end 22 is provided in the tool shank 2, and the channel 24 is used for filling with fluid. The tool tip 3 includes a main body portion 31 and a cutting portion 32. The tool tip 3 is rotatably disposed in the receiving groove 23, and the main body portion 31 of the tool tip 3 is connected to the tool shank 2 by a pin 5. One side of the main body portion 31 away from the cutting portion 32 has a abutting surface 311. Both the abutting surface 311 and the second groove wall 234 are arc-shaped structures and are fitted with each other. The cutting portion 32 includes a plurality of blades 324 arranged at intervals. A chip discharge groove 325 is formed between adjacent blades 324. The blade 324 also has a connected first cutting surface 321, a second cutting surface 322, and a third cutting surface 323. The elastic member 4 includes a compression spring disposed in the first groove 26. The compression spring extends along the first direction X, with one end abutting against the bottom of the first groove 26 and the other end abutting against the main body portion 31 of the tool tip 3. The tool tip 3 can rotate between a first position and a second position. Specifically, when the pressure of the fluid filled in the channel 24 is less than the pressure provided by the compression spring to the tool tip 3, the tool tip 3 rotates to the first position and can be maintained at the first position. When the tool tip 3 is maintained at the first position, at least a part of the cutting portion 32 of the tool tip 3 extends out of the receiving groove 23 through the second notch 232, and the projection of the tool tip 3 along the first direction falls within the projection of the tool shank 2 along the first direction; when the pressure of the fluid filled in the channel 24 is greater than the pressure provided by the compression spring to the tool tip 3, the tool tip 3 rotates to the second position and can be maintained at the second position. When the tool tip 3 is maintained at the second position, at least a part of the cutting portion 32 of the tool tip 3 extends out of the receiving groove 23 and extends out of the side wall of the tool shank 2 through the first notch 231. When the tool tip 3 is in the first position, the tool shank 2 and the tool tip 3 can move freely in the flow channel. When the tool tip 3 rotates between the first position and the second position or is maintained at the second position, the tool tip 3 can perform a cutting action. The cutting assembly 100 provided in the above embodiment can realize the free rotation of the tool tip 3 on the tool shank 2 by improving the assembly method of the tool tip 3 and the tool shank 2 and the installation position of the tool tip 3 on the tool shank 2, and by providing structures such as the receiving groove 23, the elastic member 4, and the channel 24 on the tool shank 2. Therefore, the cutting assembly 100 can perform a cutting action in a deep cavity flow channel and a cross flow channel, can quickly, accurately, and effectively remove the burr 13 in the flow channel, and solves the problem of poor burr 13 removal effect in the related art.

[0152] The second aspect of the present application provides a cutting tool 1000, which includes a tool handle 200 and a cutting component 100 as in the first aspect. The tool bar 2 in the cutting component 100 is installed on the tool handle 200.

[0153] Please refer to Figure 3 and Figure 15 , the cutting component 100 includes a tool bar 2 and a tool tip 3. The tool bar 2 includes a first end 21 and a second end 22. The first end 21 is used to install the tool tip 3, and the second end 22 is installed on the tool handle 200.

[0154] The tool handle 200 is used to connect the cutting component 100 and the machine tool spindle, provide physical support, and transmit rotational force to the cutting component 100. The tool handle 200 can be a straight shank or a taper shank. The connection between the tool handle 200 and the tool bar 2 is detachable. For example, it can be locked by mechanical threads or hydraulically. In practical applications, different cutting components 100 can be replaced according to processing requirements.

[0155] In some embodiments, the tool handle 200 is a CNC (Computer Numerical Control) tool handle designed for computer numerical control machine tools. After the tool handle 200 is connected to the cutting component 100, the inlet of the channel 24 of the tool bar 2 is connected through a pipeline, and gas or liquid is filled into the channel 24. The tool bar 2 is rotatably connected to the tool handle 200.

[0156] In the above embodiments, by improving the structure of the cutting component 100, specifically, by improving the assembly method of the tool tip 3 and the tool bar 2 and the installation position of the tool tip 3 on the tool bar 2, and by providing structures such as a receiving groove 23, an elastic member 4, and a channel 24 on the tool bar 2, the tool tip 3 can be freely rotated on the tool bar 2, so that the cutting tool 1000 can perform cutting actions in deep cavity channels and cross channels, and can quickly, accurately, and effectively remove the burrs 13 in the channels, solving the problem of poor burr 13 removal effect in the related art.

[0157] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A cutting component, characterized in that, Comprising: A tool shank, in which a receiving groove and a channel communicating with the receiving groove are provided. The channel extends in a first direction, where the first direction is the length direction of the tool shank; A tool tip, which includes a main body portion and a cutting portion. The tool tip is disposed in the receiving groove and can rotate between a first position and a second position. In the first position, the projection of the tool tip along the first direction falls within the projection of the tool shank along the first direction. In the second position, the projection of the cutting portion along the first direction protrudes from the side wall of the tool shank; An elastic member, connected to the tool tip, and the elastic member is used to drive the tool tip to rotate towards the first position; The tool tip closes the opening of the channel communicating with the receiving groove, and the channel is used to fill with fluid to abut against the tool tip so that the tool tip rotates towards the second position.

2. The cutting assembly according to claim 1, wherein The receiving groove includes a first notch on the side wall of the tool shank. In the second position, the cutting portion extends out of the side wall of the tool shank through the first notch.

3. The cutting assembly according to claim 2, wherein The tool shank includes a first end and a second end distributed along the first direction. The receiving groove is disposed at the first end, and the receiving groove further includes a second notch on the end face of the first end. The second notch communicates with the first notch.

4. The cutting assembly according to claim 3, characterized in that, In the first position, at least a part of the cutting portion extends out of the first end through the second notch; in the second position, one side surface of the tool tip is flush with the end face of the first end.

5. The cutting assembly according to claim 3, wherein, The receiving groove further includes a third notch on the side wall of the tool shank and opposite to the first notch. The first notch and the third notch are distributed in a direction perpendicular to the first direction.

6. The cutting assembly according to claim 1, wherein, A first mounting hole is provided on the tool shank, and a second mounting hole opposite to the first mounting hole is provided on the main body portion. The cutting assembly further includes a pin, and the pin is inserted through the first mounting hole and the second mounting hole to fix the tool tip on the tool shank.

7. The cutting component according to claim 6, wherein The pin is in interference fit with the first mounting hole, and the tool tip is sleeved on the pin with a clearance; or the pin is inserted into the first mounting hole with a clearance, and the tool tip is fixedly sleeved on the pin.

8. The cutting assembly according to claim 7, wherein, The receiving groove includes a first groove wall, and a first groove is provided on the first groove wall. The elastic member includes a compression spring disposed in the first groove. One end of the compression spring abuts against the main body portion, and the deformation direction of the compression spring is parallel to the first direction.

9. The cutting assembly according to claim 7, wherein, The elastic member includes a torsion spring, and the torsion spring is sleeved between the pin and the tool tip, or the torsion spring is sleeved between the pin and the tool shank.

10. The cutting component according to any one of claims 1-9, characterized in that, The cutting portion includes a first cutting surface, a second cutting surface, and a third cutting surface sequentially connected along a second direction. The angle between the first cutting surface and the second cutting surface is an obtuse angle, and the angle between the second cutting surface and the third cutting surface is an obtuse angle, where the second direction is the rotation direction of the tool tip.

11. The cutting assembly according to any one of claims 1-9, characterized in that, The cutting portion includes a plurality of blades spaced along a third direction, and chip removal grooves are formed between adjacent blades, where the third direction is perpendicular to the first direction.

12. The cutting assembly according to any one of claims 1-9, characterized in that, The accommodating groove includes a second groove wall, the main body portion includes a supporting surface opposite to the cutting portion, both the second groove wall and the supporting surface are arc-shaped structures, and the supporting surface is in sliding fit with the second groove wall.

13. The cutting assembly according to any one of claims 1-9, characterized in that, A second groove opposite to the channel is provided on the main body portion, and the second groove closes the opening of the channel communicating with the accommodating groove.

14. The cutting assembly according to any one of claims 1-9, characterized in that, At the second position, the maximum value of the length by which the cutting portion extends out of the side wall is 2 mm.

15. The cutting assembly according to any one of claims 1-9, characterized in that, The fluid is a gas, and the charging pressure is 0.4 Mpa - 0.7 Mpa; or the fluid is a liquid, and the charging pressure is 0.7 Mpa - 1 Mpa.

16. The cutting assembly according to any one of claims 1-9, characterized in that, The cross-section of the channel is circular, and the diameter of the channel is 1 mm - 2 mm.

17. A cutting tool, characterized in that, It includes a tool shank and a cutting assembly according to any one of claims 1 - 16, and the tool bar is installed on the tool shank.

18. The cutting tool according to claim 17, characterized in that, The tool bar is rotatably connected to the tool shank.

Images