Grooving cutter
By designing a groove knife with a clamping part and a hook-shaped machining part, the accuracy and chip removal problems of existing groove knife when processing conical or small grooves are solved, and the precise processing and chip removal of complex-shaped grooves are achieved, ensuring processing accuracy and safety.
Patent Information
- Application Number
- CN202421434273.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-21
AI Technical Summary
Existing groove knives cannot be accurately processed when processing conical or smaller grooves, and are prone to damage due to inability to avoid workpieces. At the same time, waste chips from chip removal accumulate on the surface of the workpiece, affecting the processing accuracy and line of sight.
A groove cutter including a clamping part and a hook-shaped processing part is designed. The hook-shaped processing part has a tapered cutting head and a guide groove. The tapered cutting head can be extended to any position to process a groove of complex shape, and the guide groove is used to discharge chips and guide the cutting fluid to the cutting point.
The precise processing of the conical groove is achieved, which avoids collision between the groove cutter and the workpiece, effectively discharges chips, prevents them from accumulating, and ensures the machining accuracy and safety of the workpiece.
Smart Images
Figure CN222778931U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical processing, in particular to a slotting cutter. Background Art
[0002] In machining, slot cutters are usually used to create grooves of various shapes on workpieces. It only requires replacing slot cutters with different structural forms. Some conical or smaller grooves have more stringent requirements on slot cutters.
[0003] Most existing slotting cutters are rectangular slotting cutters or triangular slotting cutters with flat outer end faces. When using the above two types of slotting cutters to process conical or smaller grooves, not only can the desired grooves not be obtained, but the slotting cutters will also be unable to avoid collisions with the workpiece, thereby damaging the workpiece and the slotting cutter. In addition, current slotting cutters usually have a groove at the tip of the cutter head for chip removal. However, the removed waste chips will accumulate on the surface of the workpiece, which will block the line of sight, making it impossible to check the processing status, and will hinder the work of the slotting cutter. When there is a lot of accumulation, the processing needs to be suspended, and the waste chips must be cleaned before processing can be resumed, which can easily cause errors and affect the processing accuracy of the workpiece. Utility Model Content
[0004] The utility model aims to provide a groove cutter which can accurately process a tapered groove that meets the requirements and has strong versatility. At the same time, it can prevent waste chips from accumulating on the surface of the workpiece, can discharge the waste chips immediately, avoid the waste chips from scratching the processed surface, and can accurately cool and lubricate the processing point to ensure the processing accuracy of the workpiece.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A slotting cutter, comprising:
[0007] A clamping portion configured to be clamped on a machine tool chuck;
[0008] The hook-shaped processing portion comprises a knife neck and a conical tool head protruding from the knife neck along a first direction, wherein one end of the knife neck away from the conical tool head is connected to the clamping portion; the conical tool head comprises a front end face, a rear end face and a blade, wherein the front end face is located on a side of the conical tool head facing away from the clamping portion, the distance between the front end face and the rear end face gradually decreases along the first direction, and the blade is arranged at the connection between the front end face and the rear end face;
[0009] The front end face is provided with a guide groove, which extends from the blade to an end of the front end face away from the blade, and is used to guide the discharge of chips at the cutting point and guide the cutting fluid to the cutting point.
[0010] Optionally, a first cut surface and a second cut surface are respectively provided on opposite sides of the tool diameter along the second direction, the first cut surface and the second cut surface both extend to the conical tool head, the first direction, the second direction and the extension direction of the groove tool are perpendicular to each other; the guide groove is located at the junction of the front end face and the first cut surface.
[0011] Optionally, the blade neck is provided with a first avoidance cut surface, which is arranged on one side of the blade neck along the second direction and connected between the clamping portion and the first cut surface, and along the direction from the clamping portion to the conical blade head, the distance between the first avoidance cut surface and the second cut surface gradually decreases.
[0012] Optionally, an angle between the first section surface and the front end surface is greater than or equal to 85° and less than or equal to 87°.
[0013] Optionally, the clamping portion is provided with a fitting surface and a pressing surface, the fitting surface is an arcuate surface, the pressing surface is a plane, and the fitting surface and the pressing surface are connected end to end; the fitting surface fits with the inner wall of the machine tool chuck, and the pressing surface can press against the machine tool chuck.
[0014] Optionally, the cross-sectional area of the tool neck is smaller than the cross-sectional area of the clamping portion, and the groove cutter further comprises a transition section, the transition section is connected between the tool neck and the clamping portion, and the cross-sectional size of the transition section gradually decreases along the direction from the clamping portion to the conical cutter head;
[0015] The knife neck is provided with a connecting plane, and the transition section is provided with a transition surface. One end of the connecting plane is connected to the rear end surface, and the other end is connected to the fitting surface through the transition surface. Arc transition structures are provided between the fitting surface and the transition surface, between the transition surface and the connecting plane, and between the connecting plane and the rear end surface.
[0016] Optionally, a second avoidance cut surface is provided on the side of the blade neck facing away from the blade, the second avoidance cut surface is connected between the front end face and the blade neck, and along the direction from the clamping portion to the blade, the second avoidance cut surface gradually inclines toward the blade.
[0017] Optionally, a third section is provided between the second avoidance section and the front end face.
[0018] Optionally, the blade is an arc blade, and the arc blade is connected between the front end face and the rear end face.
[0019] Optionally, the front end surface gradually inclines toward the clamping portion along the first direction.
[0020] Beneficial effects of the utility model:
[0021] The utility model provides a slotting cutter, comprising a clamping portion and a hook-shaped processing portion. When processing a workpiece, the clamping portion is fixed in a chuck of a machine tool, and the chuck of the machine tool clamps the clamping portion, so that the slotting cutter is fixed on the machine tool, and then the conical cutter head of the slotting cutter extends to the position of the workpiece to be processed, and the workpiece is cut by the blade. By setting the hook-shaped processing portion, the outer end face of the slotting cutter can be prevented from colliding with the workpiece, and the conical cutter head can be extended to any position, and various complex forms of grooves, especially conical grooves, can be processed, and the versatility is strong. When the blade cuts the workpiece, chips are generated, and the chips can be guided into the guide groove, and in this process, the chips will continue to extend until they extend out of the guide groove. At this time, once the slotting cutter vibrates or changes position, the notch of the guide groove will cut off the chips, and the cut chips are discharged, so that the chips are prevented from accumulating on the surface of the workpiece to block the line of sight, which is convenient for checking the processing status, avoiding affecting the groove processing, and ensuring the processing accuracy of the workpiece. In addition, when the blade cuts the workpiece, cutting heat is generated, which increases the temperature of the groove cutter and the workpiece, and cutting fluid needs to be sprayed. The guide groove can accurately guide the cutting fluid to the cutting point, achieving effective cooling and lubrication, and ensuring the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a first view of the groove cutter provided by the embodiment of the utility model;
[0023] Figure 2 This is a second view of the groove cutter provided by the embodiment of the utility model;
[0024] Figure 3 yes Figure 2 The enlarged view of point A in the middle;
[0025] Figure 4 This is a third view of the groove cutter provided by the embodiment of the utility model;
[0026] Figure 5 This is a fourth view of the groove cutter provided by the embodiment of the utility model;
[0027] Figure 6 yes Figure 5 Enlarged view of point B in the middle.
[0028] In the figure:
[0029] 1. Clamping part; 11. Fitting surface; 12. Pressing surface;
[0030] 2. hook-shaped processing part; 21. knife neck; 211. first avoidance section; 212. connection plane; 213. second avoidance section; 22. conical cutter head; 221. front end face; 2211. guide groove; 222. rear end face; 223. blade; 224. first section; 225. second section; 23. third section;
[0031] 3. Transition section; 31. Transition surface. DETAILED DESCRIPTION
[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0036] like Figures 1 to 6 As shown, the grooving cutter provided in this embodiment relates to the field of mechanical processing technology. The grooving cutter is firmly clamped on the chuck of a machine tool when in use, and can be used to process workpieces with various complex structures such as boss structures, tapered groove structures, boring structures, etc. It has strong versatility and can ensure the processing accuracy of the workpiece.
[0037] This embodiment provides a slotting tool such as Figures 1 to 3As shown, the slotting cutter includes a clamping portion 1 and a hook-shaped processing portion 2. The clamping portion 1 is configured to be clamped on the chuck of a machine tool to facilitate fixing the slotting cutter. The hook-shaped processing portion 2 includes a tool neck 21 and a conical tool head 22 protruding from the tool neck 21 along a first direction, and the end of the tool neck 21 away from the conical tool head 22 is connected to the clamping portion 1. The conical tool head 22 includes a front end face 221, a rear end face 222 and a blade 223, and the front end face 221 and the rear end face 222 are spaced apart on opposite sides along the extending direction of the slotting cutter, the front end face 221 is located on the side of the conical tool head 22 facing away from the clamping portion 1, and the rear end face 222 is located on the side of the conical tool head 22 close to the clamping portion 1, and the spacing between the front end face 221 and the rear end face 222 gradually decreases along the first direction, and the blade 223 is provided at the connection between the front end face 221 and the rear end face 222, and the first direction is Figure 2 The front end face 221 is provided with a guide groove 2211, which extends from the blade 223 to an end of the front end face 221 away from the blade 223, and is used to guide the discharge of chips at the cutting point and guide the cutting fluid to the cutting point.
[0038] When processing a workpiece, the clamping part 1 is fixed in the chuck of the machine tool, and the machine tool chuck clamps the clamping part 1, so that the slotting cutter is fixed on the machine tool, and then the conical cutter head 22 of the slotting cutter extends to the position of the workpiece to be processed, and the workpiece is cut by the blade 223. By setting the hook-shaped processing part 2, the outer end face of the slotting cutter can be prevented from colliding with the workpiece, and the conical cutter head 22 can be extended to any position, and various complex forms of grooves, especially conical grooves, can be processed, and the versatility is strong. When the blade 223 cuts the workpiece, chips will be generated, and the chips can be guided into the guide groove 2211. In this process, the chips will continue to extend until they extend out of the guide groove 2211. At this time, once the slotting cutter vibrates or changes position, the notch of the guide groove 2211 will cut off the chips, and the cut chips will be discharged, so as to avoid the chips from accumulating on the surface of the workpiece to block the line of sight, facilitate the inspection of the processing status, avoid affecting the groove processing, and ensure the processing accuracy of the workpiece. In addition, when the blade 223 cuts the workpiece, cutting heat is generated, which increases the temperature of the groove cutter and the workpiece, and cutting fluid needs to be sprayed. The guide groove 2211 can accurately guide the cutting fluid to the cutting point, achieve effective cooling and lubrication, and ensure the processing accuracy of the workpiece.
[0039] Alternatively, if Figure 2 and Figure 4 As shown, the first cutting surface 224 and the second cutting surface 225 are respectively arranged on opposite sides of the knife radius along the second direction. Figure 2 The first direction, the second direction and the extension direction of the slot cutter are perpendicular to each other. The extension direction of the slot cutter is Figure 2The Z direction in the cutting process. The first cut surface 224 and the second cut surface 225 both extend to the conical cutter head 22 and are connected to the conical cutter head 22. The guide groove 2211 is located at the junction of the front end face 221 and the first cut surface 224, extending from the blade 223 to the end of the front end face 221 away from the blade 223, and the junction of the first cut surface 224 and the front end face 221 and the rear end face 222 is the tip of the cutter. The workpiece is cut by the tip of the cutter, that is, the cutting point is the contact point between the tip of the cutter and the workpiece. Therefore, the chips generated at the cutting point can be guided into the guide groove 2211, cut off and discharged, so as to prevent the chips from accumulating on the surface of the workpiece and avoiding affecting the workpiece processing.
[0040] Alternatively, if Figure 4 and Figure 5 As shown, the knife neck 21 is provided with a first avoidance cut surface 211. The first avoidance cut surface 211 is provided on one side of the knife neck 21 along the second direction, and is connected between the clamping portion 1 and the first cut surface 224. Along the direction from the clamping portion 1 to the conical cutter head 22, the distance between the first avoidance cut surface 211 and the second cut surface 225 gradually decreases, that is, the width of the knife neck 21 gradually decreases. By providing the first avoidance cut surface 211, it is possible to avoid the knife neck 21 from being too wide and colliding with the workpiece, and it is convenient to extend the hook-shaped processing portion 2 into the deep groove to be processed, and the staff can observe the processing status of the workpiece in real time to avoid blocking the line of sight. In addition, the distance between the first avoidance cut surface 211 and the second cut surface 225 gradually decreases, which can retain the volume of the knife neck 21 to the greatest extent and ensure that the groove tool has sufficient rigidity.
[0041] In some embodiments, the angle between the first cut surface 224 and the front end face 221 is greater than or equal to 85° and less than or equal to 87°. After the groove of the workpiece is processed, the conical tool head 22 is pulled out from the groove. In order to prevent the conical tool head 22 from colliding with the inner wall of the workpiece groove and to facilitate pulling out, a draft angle of 3° to 5° is required along the draft direction, so the angle between the first cut surface 224 and the front end face 221 is 85° to 87°. In addition, the draft angle is controlled within the range of 3° to 5°, so that the conical tool head 22 can have a larger thickness while avoiding collision and being easy to pull out, so that the conical tool head 22 has sufficient rigidity, avoiding the conical tool head 22 from breaking and failing, and ensuring the processing accuracy of the workpiece.
[0042] like Figure 5As shown, in this embodiment, the clamping portion 1 is provided with a fitting surface 11 and a pressing surface 12. The fitting surface 11 is an arc-shaped surface, the pressing surface 12 is a plane, and the fitting surface 11 and the pressing surface 12 are connected end to end. The machine tool chuck (not shown in the figure) has a circular socket. When fixing the slot cutter, the clamping portion 1 is inserted into the circular socket of the machine tool chuck, and the fitting surface 11 can fit with the inner wall of the machine tool chuck. A pressing member (not shown in the figure) is provided in the machine tool chuck, and the pressing member is directly opposite to the pressing surface 12. When the fitting surface 11 fits with the inner wall of the machine tool chuck, the pressing member is moved toward the pressing surface 12 until it is pressed against the pressing surface 12, thereby enabling the pressing surface 12 to be pressed against the machine tool chuck, so that the slot cutter is stably fixed on the machine tool, which is convenient for processing the workpiece and prevents the processing accuracy of the workpiece from being affected by the loosening and displacement of the slot cutter.
[0043] Optionally, the cross-sectional area of the tool neck 21 is smaller than the cross-sectional area of the clamping portion 1, that is, the cross-sectional area of the clamping portion 1 is larger. On the one hand, the clamping portion 1 can have a higher strength, improve the bending and fracture resistance of the slotting cutter, ensure the normal processing of the workpiece, and can cooperate with the machine; on the other hand, appropriately reducing the volume of the tool neck 21 can avoid the collision between the slotting cutter and the workpiece, prevent interference with the cutting work, and ensure that the slotting cutter has sufficient rigidity. The slotting cutter also includes a transition section 3, which is connected between the tool neck 21 and the clamping portion 1. The cross-sectional size of the transition section 3 gradually decreases along the direction from the clamping portion 1 to the conical cutter head 22. By setting the transition section 3, the transition tool neck 21 and the clamping portion 1 can be connected, so as to prevent the cross-sectional area at the junction of the tool neck 21 and the clamping portion 1 from suddenly changing, causing a large stress concentration, and prevent the tool neck 21 from breaking and damaging the workpiece.
[0044] Furthermore, the knife neck 21 further includes a connecting plane 212, which is arranged on the side of the knife neck 21 along the first direction facing away from the second avoidance cut surface 213. The transition section 3 further includes a transition surface 31, which is arranged on the side of the transition section 3 along the first direction facing away from the second avoidance cut surface 213, and along the direction of the clamping portion 1 facing away from the blade 223, the transition surface 31 gradually tilts toward the connecting plane 212. One end of the connecting plane 212 is connected to the rear end face 222, and the other end is connected to the fitting surface 11 through the transition surface 31, and arc transition structures are arranged between the fitting surface 11 and the transition surface 31, between the transition surface 31 and the connecting plane 212, and between the connecting plane 212 and the rear end face 222, which can avoid stress concentration in the transition area, resulting in fracture and failure of the slotting cutter, and can avoid scratching the operator.
[0045] Alternatively, if Figure 1 and Figure 2As shown, a second avoidance cut surface 213 is provided on the side of the knife neck 21 facing away from the blade 223. The second avoidance cut surface 213 is connected between the front end face 221 and the knife neck 21. Along the direction from the clamping portion 1 to the blade 223, the second avoidance cut surface 213 gradually tilts toward the blade 223, that is, the side where the second avoidance cut surface 213 is connected to the front end face 221 is lower than the side where the second avoidance cut surface 213 is connected to the knife neck 21. When processing the groove, the hook-shaped processing portion 2 needs to be extended to the position to be processed. The inclined second avoidance cut surface 213 can prevent the hook-shaped processing portion 2 from colliding with the workpiece, which can prevent the workpiece from being worn and ineffective, and prevent the groove cutter from breaking and affecting the workpiece processing. In addition, the inclined second avoidance surface can increase the interval between the top surface of the hook-shaped processing portion 2 and the workpiece, ensuring that there is enough space between the top surface of the hook-shaped processing portion 2 and the workpiece, which is conducive to the discharge of the cuttings generated at the cutting point and prevents the chips from accumulating on the workpiece surface.
[0046] In other embodiments, Figure 5 and Figure 6 As shown, a third cut surface 23 is further provided between the second avoidance cut surface 213 and the front end face 221, that is, the third cut surface 23 is connected between the second avoidance cut surface 213 and the front end face 221. By providing the third cut surface 23, it is possible to avoid the formation of a sharp corner at the junction of the second avoidance cut surface 213 and the front end face 221, thereby preventing the worker from being scratched, and also preventing the sharp corner from scratching or colliding with the workpiece, thereby preventing the workpiece from being worn and failing; in addition, it is possible to avoid the generation of stress concentration, prevent the fracture and failure of the tapered cutter head 22, and ensure the safety of the cutting work.
[0047] Alternatively, if Figures 1 to 3 As shown, the blade 223 is a circular blade 223, and the circular blade 223 is connected between the front end face 221 and the rear end face 222. When processing a workpiece, the workpiece is cut by the circular blade 223. The blade 223 is set to be an arc shape, which can increase the width of the blade 223, thereby increasing the rigidity of the blade 223, preventing the blade 223 from being quickly worn out and failing, and the use of the circular blade 223 can make the cutting surface of the workpiece smooth and flat, reduce the roughness of the workpiece surface, and ensure the processing accuracy.
[0048] In this embodiment, if Figure 5 and Figure 6 As shown, the front end face 221 gradually tilts toward the clamping portion 1 along the first direction. When processing a workpiece, the conical cutter head 22 is inserted into the groove of the workpiece, and the inclined front end face 221 can increase the space between the front end face 221 and the inner wall of the groove, thereby avoiding collision between the conical cutter head 22 and the inner wall of the groove and preventing the groove cutter from breaking and failing. In addition, part of the chips generated at the cutting point will be located between the front end face 221 and the inner wall of the groove, and increasing the space between the front end face 221 and the inner wall of the groove is conducive to removing the chips at the cutting point, preventing the chips from accumulating on the workpiece surface, and avoiding affecting the workpiece processing.
[0049] Furthermore, the rear end face 222 is parallel to the first direction or approximately parallel to the first direction, and forms a tapered cutter head 22 with the front end face 221 inclined relative to the first direction. The tapered cutter head 22 has high strength, and its front end and root are not easy to break.
[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A slotting cutter, characterized in that: include: A clamping portion (1) is configured to be clamped on a machine tool chuck; The hook-shaped processing portion (2) comprises a knife neck (21) and a conical knife head (22) protruding from the knife neck (21) along a first direction, wherein one end of the knife neck (21) away from the conical knife head (22) is connected to the clamping portion (1); the conical knife head (22) comprises a front end face (221), a rear end face (222) and a blade (223); the front end face (221) is located on a side of the conical knife head (22) facing away from the clamping portion (1), the distance between the front end face (221) and the rear end face (222) gradually decreases along the first direction, and the blade (223) is arranged at the connection between the front end face (221) and the rear end face (222); The front end face (221) is provided with a guide groove (2211), and the guide groove (2211) extends from the blade (223) to an end of the front end face (221) away from the blade (223), and is used to guide the discharge of chips at the cutting point and guide the cutting fluid to the cutting point.
2. The groove cutter according to claim 1, characterized in that: A first cut surface (224) and a second cut surface (225) are respectively arranged on opposite sides of the tool radius along the second direction, the first cut surface (224) and the second cut surface (225) both extend to the conical tool head (22), the first direction, the second direction and the extension direction of the groove tool are perpendicular to each other; the guide groove (2211) is located at the junction of the front end surface (221) and the first cut surface (224).
3. The groove cutter according to claim 2, characterized in that: The knife neck (21) is provided with a first avoidance cut surface (211), which is arranged on one side of the knife neck (21) along the second direction and connected between the clamping portion (1) and the first cut surface (224), and along the direction from the clamping portion (1) to the conical knife head (22), the distance between the first avoidance cut surface (211) and the second cut surface (225) gradually decreases.
4. The groove cutter according to claim 2, characterized in that: The included angle between the first cut surface (224) and the front end surface (221) is greater than or equal to 85° and less than or equal to 87°.
5. The groove cutter according to any one of claims 1 to 4, characterized in that: The clamping portion (1) is provided with a fitting surface (11) and a pressing surface (12); the fitting surface (11) is an arcuate surface, the pressing surface (12) is a plane, and the fitting surface (11) and the pressing surface (12) are connected end to end; the fitting surface (11) fits with the inner wall of the machine tool chuck, and the pressing surface (12) can press against the machine tool chuck.
6. The slotting cutter according to claim 5, characterized in that: The cross-sectional area of the knife neck (21) is smaller than the cross-sectional area of the clamping portion (1), and the groove cutter further comprises a transition section (3), wherein the transition section (3) is connected between the knife neck (21) and the clamping portion (1), and the cross-sectional size of the transition section (3) gradually decreases along the direction from the clamping portion (1) to the conical cutter head (22); The knife neck (21) is provided with a connecting plane (212), the transition section (3) is provided with a transition surface (31), one end of the connecting plane (212) is connected to the rear end surface (222), and the other end is connected to the fitting surface (11) through the transition surface (31), and arc transition structures are provided between the fitting surface (11) and the transition surface (31), between the transition surface (31) and the connecting plane (212), and between the connecting plane (212) and the rear end surface (222).
7. The slotting cutter according to claim 6, characterized in that A second avoidance cut surface (213) is provided on the side of the knife neck (21) facing away from the blade (223); the second avoidance cut surface (213) is connected between the front end face (221) and the knife neck (21); and along the direction from the clamping portion (1) to the blade (223), the second avoidance cut surface (213) gradually inclines toward the blade (223).
8. The slotting cutter according to claim 7, characterized in that A third section (23) is provided between the second avoidance section (213) and the front end surface (221).
9. The groove cutter according to any one of claims 1 to 4, characterized in that: The blade (223) is a circular arc blade (223), and the circular arc blade (223) is connected between the front end surface (221) and the rear end surface (222).
10. The groove cutter according to any one of claims 1 to 4, characterized in that: The front end surface (221) gradually inclines toward the clamping portion (1) along the first direction.