Double-end groove cutter
By setting symmetrical notches and cutting sections in the clamping part of the double-ended grooving cutter, the vibration problem caused by the reduction of clamping area is solved, achieving stable clamping and extending service life, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WOLD (JIAXING) CARBIDE CNC TOOLS CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-01
AI Technical Summary
When a double-ended grooving cutter is clamped and fixed to a machine tool, the effective clamping area between the clamping part and the machine tool is reduced, which makes the cutting part prone to vibration, reduces its service life and increases costs.
The clamping section has first and second clamping surfaces that are opposite to each other, and symmetrical notches are provided at one end of each clamping surface. Cutting parts are arranged thereto, so that the contact area between the cutting parts and the machine tool is increased and the clamping effect is improved.
It increases the effective clamping area between the clamping part and the machine tool, improves the clamping effect, extends the service life of the double-ended grooving tool, and saves costs.
Smart Images
Figure CN224182106U_ABST
Abstract
Description
Double-ended grooving tool Technical Field
[0001] This utility model relates to the field of cutting tool technology, and in particular to a double-ended grooving tool. Background Technology
[0002] Turning is a metal cutting process that removes material through the relative motion between the workpiece rotation and the cutting tool. The cutting tool is the core tool used in turning to remove material from the rotating workpiece. Tool performance directly affects the machining efficiency, accuracy, and surface quality of the workpiece.
[0003] In related technologies, the cutting tool is a single-ended grooving tool, which includes a cutting section and a clamping section connected in sequence. The clamping section is fixed to the machine tool, and the machine tool drives the entire tool to move, so that the cutting section can perform cutting on the rotating workpiece. Now, a double-ended grooving tool has been developed. The double-ended grooving tool includes a cutting section, a clamping section, and a cutting section connected in sequence. By equipping it with two cutting sections, the number of tool changes and sharpening times is reduced, thus lowering costs. However, since the clamping section needs to be clamped and fixed to the machine tool, when the double-ended grooving tool is clamped and fixed to the machine tool, the cutting section located at the end of the clamping section closest to the machine tool reduces the effective clamping area between the clamping section and the machine tool, resulting in poor clamping effect between the clamping section and the machine tool. During the cutting process, the double-ended grooving tool is prone to vibration, which can damage the cutting section, reduce its service life, and increase costs.
[0004] Therefore, there is an urgent need to invent a double-ended grooving cutter to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to provide a double-ended grooving cutter to increase the effective clamping area between the clamping part and the machine tool, ensure the clamping effect of the machine tool on the double-ended grooving cutter, and improve cost savings.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Double-ended grooving cutter, including:
[0008] The clamping part has a first clamping surface and a second clamping surface arranged opposite each other along a first direction. The first clamping surface and the second clamping surface are respectively fixed to a machine tool. A first notch is provided at one end of the first clamping surface along a second direction, and a second notch is provided at the other end of the second clamping surface along the second direction. The first notch and the second notch are symmetrical about the center of the clamping part, and the first direction and the second direction are perpendicular to each other.
[0009] The cutting portion is provided in both the first notch and the second notch. The cutting portion in the first notch is located inside the first clamping surface along the first direction, and the cutting portion in the second notch is located inside the second clamping surface along the first direction. The cutting portion is configured to cut the workpiece.
[0010] As an optional solution, the first clamping surface includes a first clamping area, a second clamping area, and a third clamping area arranged sequentially along a third direction. The plane where the second clamping area is located is parallel to the plane jointly constructed by the second direction and the third direction. The third direction, the second direction, and the first direction are perpendicular to each other.
[0011] The first clamping area extends along the third direction from one end close to the second clamping area toward a direction away from the second clamping area, while simultaneously tilting along the first direction toward a direction close to the second clamping surface;
[0012] The third clamping area extends along the third direction from one end close to the second clamping area toward a direction away from the second clamping area, while simultaneously tilting along the first direction toward a direction close to the second clamping surface.
[0013] As an optional feature, the rake face of the cutting part is provided with chip breaking protrusions and / or chip breaking grooves.
[0014] As an optional solution, the first clamping surface, the second clamping surface, and the main flank face of the cutting part are all ground.
[0015] As an option, the length of the first notch along the first direction shall not exceed one-third of the length of the first clamping surface along the first direction;
[0016] The length of the second notch along the first direction does not exceed one-third of the length of the second clamping surface along the first direction.
[0017] As an optional feature, the cutting edge rake angle of the cutting part is 0° to 35°.
[0018] As an optional feature, the main clearance angle of the cutting part is 5° to 12°.
[0019] As an optional solution, both the main cutting edge and the secondary cutting edge of the cutting part are passivated.
[0020] As an option, the surface of the cutting part is provided with a physical vapor deposition coating and / or a chemical vapor deposition coating.
[0021] As an optional solution, the double-ended grooving tool is made of cemented carbide.
[0022] The beneficial effects of this utility model are:
[0023] The double-ended grooving cutter provided by this utility model achieves stable clamping and fixation between the clamping part and the machine tool by setting a first clamping surface and a second clamping surface opposite to each other along a first direction in the clamping part, so that the first clamping surface and the second clamping surface are respectively abutted and fixed to the machine tool. By setting a first notch at one end of the first clamping surface along a second direction and a second notch at the other end of the second clamping surface along a second direction, the first notch and the second notch are symmetrical with respect to the center of the clamping part by utilizing the mutual perpendicularity of the first direction and the second direction, and cutting parts are arranged at the first notch and the second notch respectively, so that cutting parts are arranged at both ends of the clamping part along the second direction, thus constructing the basic structure of the double-ended grooving cutter. By making the cutting part at the first notch located inside the first clamping surface along the first direction, and making the cutting part at the second notch located inside the first notch located inside the first clamping surface along the first direction, and by making the cutting part at the second notch located inside the first notch located inside the first clamping surface, the basic structure of the double-ended grooving cutter is constructed. The cutting portion of the tool is located inside the second clamping surface along the first direction. When cutting is required using the cutting portion at the first notch, the cutting portion at the second notch can avoid contact with the machine tool. Furthermore, there is a portion within the first clamping surface that is directly opposite the second notch along the first direction, which increases the contact area between the first clamping surface and the machine tool. This increases the effective clamping area between the clamping portion and the machine tool, ensuring the clamping effect of the machine tool on the double-ended grooving tool, improving the protection of the double-ended grooving tool, extending the service life of the double-ended grooving tool, and saving costs. Attached Figure Description
[0024] Figure 1 is a schematic diagram of the first structure of the double-headed grooved cutter provided in Embodiment 1 of this utility model;
[0025] Figure 2 is a schematic diagram of the second structure of the double-headed grooved cutter provided in Embodiment 1 of this utility model;
[0026] Figure 3 is a schematic diagram of the third structure of the double-headed grooved cutter provided in Embodiment 1 of this utility model;
[0027] Figure 4 is a schematic diagram of the fourth structure of the double-headed grooved cutter provided in Embodiment 1 of this utility model;
[0028] Figure 5 is a schematic diagram of the first structure of the double-headed grooved knife provided in Embodiment 2 of this utility model;
[0029] Figure 6 is a schematic diagram of the second structure of the double-headed grooved cutter provided in Embodiment 2 of this utility model;
[0030] Figure 7 is a schematic diagram of the third structure of the double-headed grooved knife provided in Embodiment 2 of this utility model;
[0031] Figure 8 is a schematic diagram of the fourth structure of the double-headed grooved cutter provided in Embodiment 2 of this utility model.
[0032] In the picture:
[0033] 100. Double-ended grooving tool; 110. Cutting section; 111. Chip breaking protrusion; 112. Main flank face; 113. Rake face; 120. Clamping section; 121. First clamping surface; 1211. First notch; 1212. First clamping area; 1213. Second clamping area; 1214. Third clamping area; 122. Second clamping surface; 1221. Second notch; 1222. Fourth clamping area; 1223. Fifth clamping area; 1224. Sixth clamping area. Detailed Implementation
[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] Example 1
[0039] In turning, cutting tools are the core tools used to remove material from rotating workpieces. Tool performance directly affects machining efficiency, accuracy, and surface quality. In related technologies, the tool is a single-ended grooving cutter, which includes a cutting section and a clamping section connected in sequence. The clamping section is fixed to the machine tool, and the machine tool drives the entire tool to move, enabling the cutting section to cut the rotating workpiece. Now, a double-ended grooving cutter has been developed. A double-ended grooving cutter includes a cutting section, a clamping section, and another cutting section connected in sequence. By equipping it with two cutting sections, the number of tool changes and sharpening operations is reduced, lowering costs. However, because the clamping section needs to be fixed to the machine tool, when the double-ended grooving cutter is clamped to the machine tool, the cutting section located near the machine tool end of the clamping section reduces the effective clamping area between the clamping section and the machine tool, resulting in poor clamping effect. During the cutting process, the double-ended grooving cutter is prone to vibration, leading to damage to the cutting section, reduced service life, and increased costs.
[0040] To solve the above problems, as shown in Figures 1 to 4, this embodiment provides a double-headed grooving tool 100. The double-ended grooving cutter 100 includes a cutting part 110 and a clamping part 120. The clamping part 120 has a first clamping surface 121 and a second clamping surface 122 arranged opposite to each other along a first direction. The first clamping surface 121 and the second clamping surface 122 are respectively fixed to the machine tool. A first notch 1211 is provided at one end of the first clamping surface 121 along a second direction, and a second notch 1221 is provided at the other end of the second clamping surface 122 along the second direction. The first notch 1211 and the second notch 1221 are symmetrical about the center of the clamping part 120. The first direction and the second direction are perpendicular to each other. Both the first notch 1211 and the second notch 1221 are provided with cutting parts 110. The height of the cutting part 110 in the first notch 1211 along the first direction is lower than that of the first clamping surface 121, and the height of the cutting part 110 in the second notch 1221 along the first direction is lower than that of the second clamping surface 122. The cutting part 110 is configured to cut the workpiece.
[0041] The double-ended grooving cutter 100 achieves stable clamping and fixation between the clamping part 120 and the machine tool by providing a first clamping surface 121 and a second clamping surface 122 arranged opposite each other along a first direction within the clamping part 120. The first clamping surface 121 and the second clamping surface 122 are respectively fixed to the machine tool by abutting against each other. A first notch 1211 is provided at one end of the first clamping surface 121 along a second direction, and a second notch 1221 is provided at the other end of the second clamping surface 122 along the second direction. Utilizing the perpendicularity between the first and second directions, the first notch 1211 and the second notch 1221 are symmetrical about the center of the clamping part 120. Cutting portions 110 are arranged at the first notch 1211 and the second notch 1221 respectively, thus arranging cutting portions 110 at both ends of the clamping part 120 along the second direction, constructing the basic structure of the double-ended grooving cutter 100. The cutting portion 110 located at the first notch 1211 is positioned inside the first clamping surface 121 along the first direction, and the cutting portion 110 located at the second notch... The cutting portion 110 of 1221 is located inside the second clamping surface 122 along the first direction. When cutting is required using the cutting portion 110 located at the first notch 1211, the cutting portion 110 located at the second notch 1221 can avoid contact with the machine tool. Moreover, there is a portion within the first clamping surface 121 that is directly opposite the second notch 1221 along the first direction, which can increase the contact area between the first clamping surface 121 and the machine tool. During cutting, the cutting part 110 at the first notch 1211 can avoid contact with the machine tool. Moreover, there is a part in the second clamping surface 122 that is directly opposite the first notch 1211 along the first direction, which can increase the contact area between the second clamping surface 122 and the machine tool, thereby increasing the effective clamping area between the clamping part 120 and the machine tool, ensuring the clamping effect of the machine tool on the double-ended grooving tool 100, improving the protection of the double-ended grooving tool 100, extending the service life of the double-ended grooving tool 100, and saving costs.
[0042] It should be noted that in this embodiment, the first direction is the up-down direction, and the second direction is the left-right direction. In other embodiments, the specific directions of the first and second directions can be adjusted according to actual needs, and this embodiment does not impose any specific limitations.
[0043] As an optional embodiment, the first clamping surface 121 includes a first clamping area 1212, a second clamping area 1213, and a third clamping area 1214 arranged sequentially along a third direction. The plane containing the second clamping area 1213 is parallel to the plane jointly constructed by the second direction and the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The first clamping area 1212 extends along the third direction from one end close to the second clamping area 1213 toward a direction away from the second clamping area 1213 while tilting along the first direction toward a direction close to the second clamping surface 122. The third clamping area 1214 extends along the third direction from one end close to the second clamping area 1213 toward a direction away from the second clamping area 1213 while tilting along the first direction toward a direction close to the second clamping surface 122.
[0044] By dividing the first clamping surface 121 into a first clamping area 1212, a second clamping area 1213, and a third clamping area 1214 connected sequentially along a third direction, it is ensured that the plane containing the second clamping area 1213 is parallel to the plane jointly constructed by the second direction and the third direction. Combining the characteristic that the first direction, the second direction, and the third direction are mutually perpendicular in space, the first clamping area 1212 extends along the third direction from the end near the second clamping area 1213 toward the direction away from the second clamping area 1213, while simultaneously extending along the first direction toward the end near the second clamping area 1213. The first clamping surface 121 is inclined in the direction close to the second clamping surface 122, and the third clamping area 1214 extends along a third direction from one end of the second clamping area 1213 away from the second clamping area 1213 while being inclined along the first direction towards the second clamping surface 122. When the first clamping surface 121 is abutted and fixed with the machine tool, the first clamping area 1212 and the third clamping area 1214 can provide a clamping force towards the second clamping surface 122 on the first clamping surface 121, further improving the abutment and fixing effect between the first clamping surface 121 and the machine tool. It should be noted that in this embodiment, since the first direction is the up-down direction and the second direction is the left-right direction, the third direction is the front-back direction to ensure that the first direction, the second direction, and the third direction are perpendicular to each other in space. In other embodiments, the specific directions of the first direction, the second direction, and the third direction can be arbitrarily adjusted according to actual needs, as long as the first direction, the second direction, and the third direction are perpendicular to each other in space. This embodiment does not make specific limitations.
[0045] Furthermore, in this embodiment, the second clamping surface 122 includes a fourth clamping region 1222, a fifth clamping region 1223, and a sixth clamping region 1224 connected sequentially along a third direction. The specific structure of the second clamping surface 122 is the same as that of the first clamping surface 121, and will not be described in detail here for the sake of simplicity.
[0046] To further reduce the impact of the first notch 1211 and the second notch 1221 on the clamping effect of the clamping part 120 and the machine tool, the length of the first notch 1211 along the first direction does not exceed one-third of the length of the first clamping surface 121 along the first direction, and the length of the second notch 1221 along the first direction does not exceed one-third of the length of the second clamping surface 122 along the first direction. In this embodiment, the length of the first notch 1211 along the first direction is one-quarter of the length of the first clamping surface 121 along the first direction, and the length of the second notch 1221 along the first direction is one-quarter of the length of the second clamping surface 122 along the first direction. In other embodiments, the ratio of the length of the first notch 1211 along the first direction to the length of the first clamping surface 121 along the first direction, and the ratio of the length of the second notch 1221 along the first direction to the length of the second clamping surface 122 along the first direction can also be adjusted according to actual needs; this embodiment does not impose specific limitations.
[0047] In an optional embodiment, both the first clamping surface 121 and the second clamping surface 122 are ground. By grinding the first clamping surface 121 and the second clamping surface 122, the surface roughness of the first clamping surface 121 and the second clamping surface 122 can be increased. When the first clamping surface 121 and the second clamping surface 122 abut against the machine tool, the friction between the first clamping surface 121 and the machine tool and the friction between the second clamping surface 122 and the machine tool are increased, further improving the clamping stability between the machine tool and the clamping part 120.
[0048] Furthermore, in this embodiment, when the cutting portion 110 located at the first notch 1211 performs cutting, the main flank face 112 of the cutting portion 110 located at the second notch 1221 abuts against the machine tool. When the cutting portion 110 located at the second notch 1221 performs cutting, the main flank face 112 of the cutting portion 110 located at the first notch 1211 abuts against the machine tool. In this embodiment, the main flank faces 112 of both cutting portions 110 are ground to increase the friction between the main flank faces 112 and the machine tool, thereby improving the stability of the machine tool's clamping of the double-ended grooving tool 100.
[0049] As an optional design, the cutting part 110 is rectangular. The rake angle of the cutting part 110 is 0° to 35°. In this embodiment, the preferred rake angles are 5°, 10°, 15°, 20°, 25°, 30°, and 35°. It should be noted that the specific rake angle can be adjusted arbitrarily within the range of 0° to 35° according to the actual machining requirements and the specific material of the workpiece. For example, a larger rake angle can be used for soft materials to improve machining efficiency and surface quality; a smaller rake angle can be selected for brittle materials to enhance the cutting edge strength and prevent chipping.
[0050] Optionally, the principal clearance angle of the cutting part 110 is 5° to 12°. In this embodiment, the preferred angles of the cutting edge rake angle are 5°, 6°, 7°, 8°, 9°, 10°, 11°, and 12°. It should be noted that the specific angle of the principal clearance angle needs to be adjusted arbitrarily within the range of 0° to 35° according to the actual machining requirements and the specific material of the workpiece.
[0051] In some embodiments, the rake face 113 of the cutting section 110 is provided with a chip-breaking protrusion 111. By setting the flow path of the chips through the chip-breaking protrusion 111, the chips are squeezed and broken during the discharge process, preventing chips from entangled in the workpiece or the double-ended grooving cutter 100, reducing friction between the chips and the double-ended grooving cutter 100 and the workpiece, reducing tool wear, extending tool life, and ensuring the surface finish of the workpiece. It should be noted that in this embodiment, the chip-breaking protrusion 111 is V-shaped and set on the rake face 113. This chip-breaking protrusion 111 is specifically designed for workpieces made of steel. In other embodiments, the specific shape of the chip-breaking protrusion 111 can also be adjusted according to the specific material of the workpiece. In addition, in other embodiments, a chip-breaking groove can also be provided in the rake face 113 to fold the chips in time; this embodiment does not specifically limit this.
[0052] In this embodiment, the double-ended grooving cutter 100 is made of cemented carbide. Cemented carbide is an alloy material made from a hard compound of refractory metal and a binder metal through powder metallurgy. Cemented carbide possesses a series of excellent properties, including high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. In particular, its high hardness and wear resistance remain essentially unchanged even at 500°C, and it still maintains high hardness at 1000°C. The double-ended grooving cutter 100 made of cemented carbide can cut and process workpieces of different materials, thus expanding its applicability.
[0053] To improve the structural strength of the cutting part 110, a physical vapor deposition (PVD) coating is provided on the surface of the cutting part 110. In other embodiments, a chemical vapor deposition (CVD) coating may also be provided on the surface of the cutting part 110. The specific structures and preparation processes of both physical vapor deposition and chemical vapor deposition coatings are prior art and will not be described in detail here.
[0054] Furthermore, both the main cutting edge and the secondary cutting edge of the cutting section 110 are passivated. By passivating the main cutting edge and the secondary cutting edge separately, the cavity bottom of the main cutting edge and the secondary cutting edge can be further strengthened, enabling the double-ended grooving tool 100 to achieve stable cutting of the workpiece even under harsh machining conditions. It should be noted that the specific steps and working principle of the passivation treatment are existing technologies and will not be elaborated here.
[0055] Example 2
[0056] This embodiment provides a double-ended grooving cutter 100. The specific structure of the double-ended grooving cutter 100 provided in this embodiment is basically the same as that in Embodiment 1. The difference between the double-ended grooving cutter 100 provided in this embodiment and Embodiment 1 is that the specific shape of the cutting part 110 and the specific shape of the chip breaking protrusion 111 are different.
[0057] As shown in Figures 5-8, in the double-ended grooving cutter 100 provided in this embodiment, the cutting portion 110 is cylindrical, and the chip-breaking protrusion 111 is polygonal and fixed on the rake face 113. The cutting portion 110 and the chip-breaking protrusion 111 provided in this embodiment are designed for stainless steel workpieces. In other embodiments, the specific shape of the cutting portion 110 and the specific shape of the chip-breaking protrusion 111 can be adjusted according to the specific material of the workpiece; this embodiment does not impose specific limitations.
[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A double-ended grooving cutter, characterized in that, Includes: A clamping part (120) has a first clamping surface (121) and a second clamping surface (122) arranged opposite each other along a first direction. The first clamping surface (121) and the second clamping surface (122) are respectively fixed to the machine tool. A first notch (1211) is provided at one end of the first clamping surface (121) along a second direction, and a second notch (1221) is provided at the other end of the second clamping surface (122) along the second direction. The first notch (1211) and the second notch (1221) are opposite to the clamping part (120). 20) Centrally symmetrical, with the first direction and the second direction perpendicular to each other; and a cutting portion (110), wherein the first notch (1211) and the second notch (1221) are both provided with the cutting portion (110), the cutting portion (110) located in the first notch (1211) is located inside the first clamping surface (121) along the first direction, and the cutting portion (110) located in the second notch (1221) is located inside the second clamping surface (122) along the first direction, and the cutting portion (110) is configured to cut the workpiece.
2. The double-ended grooving cutter according to claim 1, characterized in that, The first clamping surface (121) includes a first clamping area (1212), a second clamping area (1213), and a third clamping area (1214) arranged sequentially along a third direction. The plane containing the second clamping area (1213) is parallel to the plane jointly constructed by the second direction and the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The first clamping area (1212) extends along the third direction from one end close to the second clamping area (1213) toward a direction away from the second clamping area (1213) while tilting along the first direction toward a direction close to the second clamping surface (122). The third clamping area (1214) extends along the third direction from one end close to the second clamping area (1213) toward a direction away from the second clamping area (1213) while tilting along the first direction toward a direction close to the second clamping surface (122).
3. The double-ended grooving cutter according to claim 1, characterized in that, The rake face (113) of the cutting part (110) is provided with chip breaking protrusions (111) and / or chip breaking grooves.
4. The double-ended grooving cutter according to claim 3, characterized in that, The first clamping surface (121), the second clamping surface (122), and the main flank face (112) of the cutting part (110) are all ground.
5. The double-ended grooving cutter according to claim 1, characterized in that, The length of the first notch (1211) along the first direction does not exceed one-third of the length of the first clamping surface (121) along the first direction; the length of the second notch (1221) along the first direction does not exceed one-third of the length of the second clamping surface (122) along the first direction.
6. The double-ended grooving cutter according to claim 1, characterized in that, The cutting edge rake angle of the cutting part (110) is 0° to 35°.
7. The double-ended grooving cutter according to claim 1, characterized in that, The main rear angle of the cutting part (110) is 5° to 12°.
8. The double-ended grooving cutter according to claim 1, characterized in that, Both the main cutting edge and the secondary cutting edge of the cutting part (110) are passivated.
9. The double-ended grooving cutter according to claim 1, characterized in that, The surface of the cutting part (110) is provided with a physical vapor deposition coating and / or a chemical vapor deposition coating.
10. The double-ended grooving cutter according to claim 1, characterized in that, The double-ended grooving tool is made of cemented carbide.