Double-rotation-direction staggered-tooth T-shaped cutter

Abstract

The utility model discloses a double-rotation-direction staggered tooth T-shaped cutter which comprises a cutter handle and a cutter head integrally connected to the cutter handle, a plurality of cutter teeth are arranged on the cutter head, the cutter teeth comprise a plurality of main teeth and a plurality of auxiliary teeth which are alternately distributed in the circumferential direction of the cutter head at intervals, the main teeth rotate rightwards and cut rightwards, and the auxiliary teeth rotate leftwards and cut rightwards. Main chip pockets or auxiliary chip pockets are correspondingly arranged between the adjacent main teeth and auxiliary teeth, the main chip pockets and the main teeth have the same rotating direction, the main chip pockets are used for discharging chips generated by cutting of the main teeth upwards, the auxiliary chip pockets and the auxiliary teeth have the same rotating direction, and the auxiliary chip pockets are used for discharging chips generated by cutting of the auxiliary teeth downwards. By adopting the staggered tooth design that the main teeth rotate rightwards and cut rightwards to discharge chips upwards and the auxiliary teeth rotate leftwards and cut rightwards to discharge chips downwards, the bidirectional chip removal mode greatly improves the chip removal efficiency, ensures the smooth operation of the machining process, prolongs the service life of the cutter, and improves the production efficiency and the machining precision.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a double-helical staggered tooth T-shaped cutter. Background Technology

[0002] In the machining industry, cutting tools are core processing tools, and their performance directly determines machining quality and production efficiency. As the manufacturing industry continues to demand higher product precision and production efficiency, the cutting performance and chip removal effect of cutting tools are becoming increasingly critical.

[0003] Traditional multi-edged cutting tools exhibit numerous chip removal-related problems during actual machining. Firstly, chip accumulation in the machining area is prevalent. Due to limitations in the tool's chip removal design, chips cannot leave the cutting area effectively and promptly. This accumulation hinders heat transfer between the tool and workpiece, causing the tool temperature to rise rapidly. Excessive temperature not only accelerates cutting edge wear, shortens tool life, and increases production costs, but can also lead to a decline in surface finish, resulting in defects such as scratches and burrs. Furthermore, when machining different materials, especially for specific shapes such as stepped cuts, existing chip removal methods are insufficient, limiting machining efficiency and accuracy. Therefore, it is necessary to improve existing technologies to overcome their shortcomings. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a double-helical staggered tooth T-shaped cutter to overcome the defects of existing cutters, such as poor chip removal effect, easy degradation of machined surface quality, and difficulty in meeting specific machining requirements.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a double-helical staggered-tooth T-shaped cutter, comprising: a cutter shank and a cutter head integrally connected to the cutter shank, wherein the cutter head is provided with a plurality of cutting teeth, the cutting teeth including a plurality of main teeth and a plurality of auxiliary teeth that are alternately distributed in the circumferential direction of the cutter head, wherein the main teeth are all right-handed and right-cutting, and the auxiliary teeth are all left-handed and right-cutting, and a main chip groove or an auxiliary chip groove is correspondingly provided between adjacent main teeth and auxiliary teeth, the main chip groove having the same helical direction as the main teeth, the main chip groove being used to discharge the chips generated by the cutting of the main teeth upward, and the auxiliary chip groove having the same helical direction as the auxiliary teeth, the auxiliary chip groove being used to discharge the chips generated by the cutting of the auxiliary teeth downward.

[0006] As a further improvement of this utility model, the main tooth has a main cutting edge and the secondary tooth has a secondary cutting edge. When the T-shaped tool rotates, the motion trajectory of the main cutting edge intersects with the motion trajectory of the secondary cutting edge.

[0007] As a further improvement of this utility model, the main teeth are provided with two teeth that are centrally symmetrically distributed, and the auxiliary teeth are also provided with two teeth that are centrally symmetrically distributed. Accordingly, a total of two main chip grooves and two auxiliary chip grooves are formed between the main teeth and the auxiliary teeth.

[0008] As a further improvement of this utility model, the included angle between the two main cutting edges on the two main teeth is θ1, where θ1 = 90° ± 0.5°.

[0009] As a further improvement of this utility model, the included angle between the two secondary cutting edges on the two secondary teeth is θ2, and 26°≤θ2≤27°.

[0010] As a further improvement of this utility model, the helix angle of the main tooth is 14°~16°, and the helix angle of the auxiliary tooth is 24°~26°.

[0011] As a further improvement of this utility model, the rake angle of the T-shaped blade is θ3, and 21°≤θ3≤23°.

[0012] As a further improvement of this utility model, the core thickness of the blade is 0.45 to 0.5 times the diameter of the handle.

[0013] As a further improvement of this utility model, the end faces of the cutting teeth are provided with end teeth.

[0014] As a further improvement of this utility model, the diameter of the end where the handle is connected to the blade is reduced to form a clearance section.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a double-helical staggered-tooth T-shaped cutter. By adopting a staggered tooth design where the main tooth rotates right-handed and cuts upwards to remove chips, and the auxiliary tooth rotates left-handed and cuts downwards to remove chips, the chips can be simultaneously removed upwards and downwards according to a specific machining area under the action of tool rotation and cutting force. This bidirectional chip removal method greatly improves chip removal efficiency, avoids excessive accumulation of chips in the cutting area, effectively reduces secondary wear of chips on the tool and workpiece, ensures smooth machining, extends tool life, and improves production efficiency. Furthermore, by optimizing chip removal, the interference of chips on the cutting edge is reduced, allowing the tool to cut more stably, thereby improving the quality of the machined surface. At the same time, the cutting forces generated by the different helical directions of the main tooth and auxiliary tooth are balanced with each other, which helps to reduce tool vibration, further improves machining accuracy, and makes the machined workpiece dimension more accurate and the surface roughness lower. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0018] Figure 2 This is a perspective view of the cutting head portion of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0019] Figure 3 This is a schematic diagram of the planar structure of the two main teeth of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0020] Figure 4 This is a schematic diagram of the planar structure of the two auxiliary teeth of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0021] Figure 5 This is a cross-sectional view of the cutting head of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0022] Figure 6 This is a cross-sectional view of the end teeth of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0023] Figure 7 This is a cross-sectional view of the rear end of the main tooth of the double-helical staggered-tooth T-shaped cutter of this utility model, showing the axial and radial directions.

[0024] Figure 8 This is a cross-sectional view of the rear end of the secondary tooth of the double-helical staggered-tooth T-shaped cutter of this utility model, showing the axial and radial directions.

[0025] Figure 9 This is a schematic diagram of the working state of the double-helical staggered-tooth T-shaped cutter of this utility model;

[0026] in, Figure 3 and Figure 4 The direction indicated by the hollow arrow is the direction of chip removal.

[0027] Referring to the accompanying drawings, the following explanations are provided:

[0028] 1. Tool holder; 101. Clearance section; 2. Tool head; 201. Main tooth; 2011. Main cutting edge; 202. Secondary tooth; 2021. Secondary cutting edge; 203. Main chip groove; 204. Secondary chip groove; 205. End tooth. Detailed Implementation

[0029] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0034] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0035] See Figure 1 This utility model provides a double-helical staggered tooth T-shaped knife, including: a handle 1 and a cutter head 2. The handle 1 is cylindrical, and the cutter head 2 is integrally connected to one end of the handle 1. The handle 1 and the cutter head 2 are integrally machined.

[0036] The diameter of the end where the tool holder 1 is connected to the tool head 2 is reduced to form a clearance section 101, which is used to avoid collision and interference between the tool holder and the workpiece or fixture, and can also provide additional space and channels for chip discharge.

[0037] See Figure 2 The cutter head 2 is provided with multiple cutting teeth, including several main teeth 201 and several secondary teeth 202 that are alternately distributed in the circumferential direction of the cutter head 2. Among them, the main teeth 201 are all right-handed and right-cutting, that is, when viewed from one end of the tool (i.e., T-shaped cutter), the helix of the main teeth 201 rotates in a clockwise direction, and right-cutting means that the main cutting edge 2011 of the main teeth 201 cuts to the right of the tool's rotation direction. The secondary teeth 202 are all left-handed and right-cutting, that is, when viewed from one end of the tool's axial direction, the helix of the secondary teeth 202 rotates in a counterclockwise direction, and similarly, right-cutting means that the secondary cutting edge 2021 of the secondary teeth 202 cuts to the right of the tool's rotation direction.

[0038] Furthermore, a main chip groove 203 or a secondary chip groove 204 is provided between adjacent main teeth 201 and secondary teeth 202. Specifically, a main chip groove 203 is provided between the main teeth 201 and the secondary teeth 202 located on the side of the main teeth 201 facing the tool rotation direction, and a secondary chip groove 204 is provided between the secondary teeth 202 and the main teeth 201 located on the side of the secondary teeth 202 facing the tool rotation direction.

[0039] In this design, the main chip groove 203 and the main tooth 201 have the same helix direction. When the tool rotates to cut the workpiece, the chips generated by the right-handed main cutting edge 2011 of the main tooth 201 move upward along the right-handed main chip groove 203. This is because, guided by the cutting force and the main chip groove 203, the chips are subjected to an upward component force along the main chip groove 203. Simultaneously, since the main cutting edge 2011 cuts to the right, the direction of the cutting force makes it easier for the chips to be discharged towards the main chip groove 203, ultimately achieving upward chip removal. This upward chip removal method helps to quickly remove chips from the cutting area, preventing chips from accumulating below the tool and thus reducing interference with subsequent cutting processes.

[0040] In this design, the secondary chip groove 204 and the secondary tooth 202 have the same helical direction. When the tool rotates, the left-handed helical structure of the secondary tooth 202 causes the chips to move downwards along the secondary chip groove 204. Unlike the main tooth 201, the left-handed secondary chip groove 204 generates a downward component force, guiding the chips to be discharged downwards from the tool. In this way, during machining, the chips generated by the secondary tooth 202 are discharged in the opposite direction to the chips generated by the main tooth 201, effectively preventing chips from accumulating in the same area and further optimizing the chip removal effect.

[0041] This invention employs a staggered tooth design, with the main tooth 201 rotating right-handed and cutting upwards to remove chips, and the auxiliary tooth 202 rotating left-handed and cutting downwards to remove chips. This allows chips to be simultaneously removed upwards and downwards according to a specific machining area under the action of tool rotation and cutting force. This bidirectional chip removal method greatly improves chip removal efficiency, avoids excessive chip accumulation in the cutting area, effectively reduces secondary wear on the tool and workpiece caused by chips, ensures smooth machining, extends tool life, and improves production efficiency. Furthermore, by optimizing chip removal, interference of chips on the cutting edge is reduced, allowing the tool to cut more stably, thereby improving the quality of the machined surface. At the same time, the cutting forces generated by the different helical directions of the main tooth 201 and the auxiliary tooth 202 are balanced, which helps to reduce tool vibration, further improves machining accuracy, and makes the machined workpiece dimensions more precise and the surface roughness lower.

[0042] In this invention, the main tooth 201 has a main cutting edge 2011, and the secondary tooth 202 has a secondary cutting edge 2021, with the main cutting edge 2011 and the secondary cutting edge 2021 having different angles. For example... Figure 9 As shown, when the tool rotates, the motion trajectory of the main cutting edge 2011 intersects with the motion trajectory of the secondary cutting edge 2021, thereby enabling the machining of stepped parts on the workpiece to meet specific machining requirements. Furthermore, through the staggered tooth structure and bidirectional helical design, the problems of burrs, chip entanglement, and poor chip removal at the stepped connection of the workpiece can be completely solved, improving product quality and machining efficiency.

[0043] like Figure 2 As shown, in this embodiment, the main teeth 201 are provided with two teeth that are centrally symmetrically distributed, and the auxiliary teeth 202 are also provided with two teeth that are centrally symmetrically distributed. Accordingly, two main chip grooves 203 and two auxiliary chip grooves 204 are formed between the main teeth 201 and the auxiliary teeth 202.

[0044] Figure 3 The diagram shown is a planar structural schematic of two main teeth 201. In this embodiment, the included angle between the two main cutting edges 2011 on the two main teeth 201 is θ1, where θ1 = 90° ± 0.5°.

[0045] Figure 4 The diagram shown is a planar structural schematic of two auxiliary teeth 202. In this embodiment, the included angle between the two auxiliary cutting edges 2021 on the two auxiliary teeth 202 is θ2, where 26°≤θ2≤27°.

[0046] In this invention, the helix angle of the main tooth 201 is 14°~16°, preferably 15°. Using a relatively small helix angle makes the helix angle of the main tooth 201 relatively gentle. During cutting, the chips are discharged upwards along this relatively gentle main chip groove 203. This design helps to precisely control the direction and speed of chip discharge, enabling the chips to be transported upwards relatively stably and reducing the likelihood of chip clogging. At the same time, the gentle main chip groove 203 reduces the resistance encountered by the chips during discharge, which is beneficial for improving chip removal efficiency.

[0047] In this invention, the helix angle of the auxiliary tooth 202 is 24°~26°, preferably 25°. Using a relatively large helix angle makes the helix angle of the auxiliary tooth 202 steeper, resulting in a stronger downward guiding force on the chips within the auxiliary chip groove 204. During tool rotation and cutting, the chips can be discharged more quickly along the steep auxiliary chip groove 204, effectively preventing chip accumulation below the tool. The differentiated helix angles of the auxiliary tooth 202 and the main tooth 201 further optimize the cutting force distribution and the entire tool's chip removal system, ensuring the cutting area remains clean and providing a guarantee for continuous and efficient cutting.

[0048] See Figure 5 The rake angle of the tool is θ3, and 21°≤θ3≤23°. The core thickness of the tool head 2 is 0.45~0.5 times the diameter of the tool holder 1. In this embodiment, the diameter of the tool holder is specifically 4mm. By designing the rake angle of the tool to be 21°~23° and the core thickness to be 45%~50%D, this utility model can balance cutting rigidity and chip removal space, and reduce vibration and wear.

[0049] See Figure 2 and Figure 6 The present invention has end teeth 205 on the end face of the cutting teeth, and the back angle of the end teeth is θ4. In this embodiment, θ4 is specifically 10°±1°.

[0050] Figure 7 (a) shows a cross-sectional view of the rear end of the main tooth 201 with an axial clearance angle. In this embodiment, the first axial clearance angle of the rear end of the main tooth 201 is θ5, and the second axial clearance angle of the rear end of the main tooth 201 is θ6. θ5 = 16° ± 1°, θ6 = 18° ± 2°, and the first axial clearance width of the rear end of the main tooth 201 is L1, L1 = 0.2 ± 0.05 mm.

[0051] Figure 7 (b) shows a cross-sectional view of the radial rear angle of the main tooth 201. In this embodiment, the first radial rear angle of the main tooth 201 is θ7, the second radial rear angle of the main tooth 201 is θ8, θ7=3°, θ8=5°, and the first radial rear width of the main tooth 201 is L2, L2=0.2±0.05mm.

[0052] Figure 8 (c) shows a cross-sectional view of the axial rear clearance angle of the auxiliary tooth 202. In this embodiment, the first axial clearance angle of the rear end of the auxiliary tooth 202 is θ9, the second axial clearance angle of the rear end of the auxiliary tooth 202 is θ10, θ9=16°±1°, θ10=18°±2°, and the first axial rear width of the rear end of the auxiliary tooth 202 is L3, L3=0.2±0.05mm.

[0053] Figure 8 (d) shows a cross-sectional view of the radial rear angle of the auxiliary tooth 202. In this embodiment, the first radial rear angle of the auxiliary tooth 202 is θ11, the second radial rear angle of the auxiliary tooth 202 is θ12, θ11=10°, θ12=30°, and the first radial rear width of the auxiliary tooth 202 is L4, L4=0.2±0.05mm.

[0054] Therefore, this utility model of a double-helical staggered-tooth T-cutter, by employing a staggered tooth design with the main tooth 201 rotating right-handed and cutting upwards to remove chips, and the auxiliary tooth 202 rotating left-handed and cutting downwards to remove chips, allows chips to be simultaneously removed upwards and downwards according to a specific machining area under the action of tool rotation and cutting force. This bidirectional chip removal method greatly improves chip removal efficiency, avoids excessive accumulation of chips in the cutting area, effectively reduces secondary wear of chips on the tool and workpiece, ensures smooth machining, extends tool life, and improves production efficiency. Furthermore, by optimizing chip removal, interference of chips on the cutting edge is reduced, allowing the tool to cut more stably, thereby improving the quality of the machined surface. At the same time, the cutting forces generated by the different helical directions of the main tooth 201 and the auxiliary tooth 202 are balanced with each other, which helps to reduce tool vibration, further improves machining accuracy, and makes the machined workpiece dimensions more accurate and the surface roughness lower.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A double-helical staggered-tooth T-shaped cutter, comprising a handle (1) and a cutter head (2) integrally connected to the handle (1), wherein the cutter head (2) is provided with a plurality of cutting teeth, characterized in that: The cutting teeth include a plurality of main teeth (201) and a plurality of auxiliary teeth (202) that are alternately distributed in the circumferential direction of the cutting head (2). The main teeth (201) are all right-handed and right-handed, and the auxiliary teeth (202) are all left-handed and right-handed. A main chip groove (203) or an auxiliary chip groove (204) is provided between adjacent main teeth (201) and auxiliary teeth (202). The main chip groove (203) has the same rotation direction as the main teeth (201) and is used to discharge the chips generated by the cutting of the main teeth (201) upward. The auxiliary chip groove (204) has the same rotation direction as the auxiliary teeth (202) and is used to discharge the chips generated by the cutting of the auxiliary teeth (202) downward.

2. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: The main tooth (201) has a main cutting edge (2011), and the secondary tooth (202) has a secondary cutting edge (2021). When the T-shaped cutter rotates, the motion trajectory of the main cutting edge (2011) intersects with the motion trajectory of the secondary cutting edge (2021).

3. The double-helical staggered-tooth T-shaped cutter according to claim 2, characterized in that: The main tooth (201) is provided with two teeth that are centrally symmetrically distributed, and the auxiliary tooth (202) is also provided with two teeth that are centrally symmetrically distributed. Accordingly, two main chip grooves (203) and two auxiliary chip grooves (204) are formed between the main tooth (201) and the auxiliary tooth (202).

4. The double-helical staggered-tooth T-shaped cutter according to claim 3, characterized in that: The included angle between the two main cutting edges (2011) on the two main teeth (201) is θ1, θ1 = 90° ± 0.5°.

5. The double-helical staggered-tooth T-shaped cutter according to claim 3, characterized in that: The included angle between the two secondary cutting edges (2021) on the two secondary teeth (202) is θ2, and 26°≤θ2≤27°.

6. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: The helix angle of the main tooth (201) is 14°~16°, and the helix angle of the auxiliary tooth (202) is 24°~26°.

7. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: The rake angle of the T-shaped blade is θ3, and 21°≤θ3≤23°.

8. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: The core thickness of the cutter head (2) is 0.45 to 0.5 times the diameter of the handle (1).

9. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: Each of the cutting teeth has end teeth (205) on its end face.

10. The double-helical staggered-tooth T-shaped cutter according to claim 1, characterized in that: The diameter of the end of the handle (1) connected to the blade (2) is reduced to form a clearance section (101).

Images