A boring tool applied to inner arc machining

Abstract

The utility model discloses a kind of boring cutter applied to inner arc processing, tool includes tool holder and blade, tool holder includes tool bar and tool bar head, tool bar head is used to cooperate and install blade;Tool bar head includes connecting portion and installation part, connecting portion is used to connect installation part and the tool bar, installation part is equipped with clamping groove, clamping groove is used to install blade in, blade is detachably fixed installation by fastening mechanism;Blade is peach type blade, installation part is the peach type installation part adapted to peach type blade.The boring cutter provided by the utility model, by the structure adaptability of the main deflection angle of tool bar head 65 degrees or so and peach type blade, effectively improve the wear resistance, anti-chipping ability of blade, significantly extend the service life of blade;It can adapt to the finish turning demand of various inner circle size arc product, widen processing application range, improve processing versatility and flexibility.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and more specifically to a boring tool for machining internal circular arcs. Background Technology

[0002] In machining workshops, the traditional method for precision turning of internal circular arcs involves using a triangular tool holder with triangular inserts. However, actual machining has revealed that triangular inserts are prone to rapid wear and chipping when machining internal circular arcs due to factors such as cutting force distribution and insert structure. This results in a short insert life, and frequent insert replacements not only increase production costs but also affect production efficiency and machining accuracy stability, failing to meet the demands for efficient and high-quality precision turning of internal circular arcs. Therefore, innovative improvements to the tool structure and application methods are urgently needed. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a boring tool for machining internal arcs. By utilizing the main cutting edge angle of approximately 65 degrees on the tool holder head and the structural compatibility with the peach-shaped insert, it effectively improves the wear resistance and chipping resistance of the insert, significantly extending the insert's machining life. It can adapt to the precision turning requirements of products with various internal arc sizes, broadening the range of machining applications and improving machining versatility and flexibility.

[0004] The technical solution adopted by this utility model to solve the technical problem is: a boring tool for machining internal arcs, the tool including a tool holder and a cutting insert, the tool holder including a tool shank and a tool shank head, the tool shank head being used to mount the cutting insert; the tool shank head including a connecting part and a mounting part, the connecting part being used to connect the mounting part and the tool shank, the mounting part being provided with a clamping groove, the clamping groove being used to mount the cutting insert, the cutting insert being detachably and fixedly mounted by a fastening mechanism; the cutting insert is a peach-shaped cutting insert, the mounting part being a peach-shaped mounting part adapted to the peach-shaped cutting insert. Furthermore, the fastening mechanism includes a fixing plate, a pressure plate, and a screw; the fixing plate is located above the peach-shaped blade; one end of the pressure plate is close to the top of the fixing plate, and the other end of the pressure plate is mounted on the connecting part.

[0005] Furthermore, screw holes are provided at corresponding positions of the mounting part, the peach-shaped blade, and the fixing plate. The fixing plate, the peach-shaped blade, and the mounting part are fixed from top to bottom by screws engaging with the screw holes.

[0006] Furthermore, both the connecting part and the end of the pressure plate are provided with screw holes, and the pressure plate and the connecting part are fixed together by screws engaging with the screw holes.

[0007] Furthermore, the peach-shaped mounting portion includes a front portion and a rear portion that are connected to each other, and the thickness of the rear portion gradually decreases from the front portion to the rear portion.

[0008] Furthermore, the angle between the rear side and the front side is between 160 and 170 degrees; the angle between the front side and the parallel direction of the tool holder is between 62 and 67 degrees.

[0009] The beneficial effects of this utility model are as follows: Compared with the prior art, the boring tool for internal arc machining provided by this utility model has the following advantages: 1) Improved insert life: By matching the boring tool holder with a principal cutting edge angle of about 65 degrees with the peach-shaped insert, the cutting mechanical environment is optimized, abnormal wear and chipping of the insert are reduced, the machining life of the insert is greatly improved, the tool change frequency is reduced, production costs are saved, and production continuity is improved.

[0010] 2) Enhanced machining adaptability: It can precisely machine products with large and small inner arcs, adapting to various specifications of inner arc machining needs. It eliminates the need for frequent tool holder changes, improves machining versatility, simplifies the tool changing process, and enhances machining efficiency and production flexibility.

[0011] 3) Machining quality assurance: Stable tool structure and cutting performance help ensure the machining accuracy of precision turning of inner arcs, such as arc radius and surface roughness, reduce scrap rate caused by tool problems, and improve product quality stability. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the cutting tool provided by this utility model.

[0013] Figure 2 This is a schematic diagram of the tool holder in the cutting tool provided by this utility model.

[0014] Figure 3 for Figure 1 A schematic diagram of the local structure of region A in the middle.

[0015] Figure 4 This is a schematic diagram of the state of the cutting tool (with an included angle α of 65 degrees) in this utility model when machining an inner arc.

[0016] Figure 5 This is a schematic diagram of the state of the cutting tool (with an included angle α of 70 degrees) during the machining of an inner arc.

[0017] Figure 6 This is a schematic diagram of the state of the cutting tool (with an included angle α of 60 degrees) during the machining of an inner arc.

[0018] Wherein, 1-tool holder; 2-tool holder head; 21-connecting part; 22-mounting part; 23-rear part; 24-front part; 25-clamping groove; 3-blade; 41-pressure plate; 42-fixing plate; 43, 44-screws; 5-workpiece. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] Example like Figure 1 and 2 As shown, a boring tool for machining inner arcs includes a tool holder and an insert 3. The tool holder includes a tool shank 1 and a tool shank head 2, the tool shank head 2 being used to mount the insert 3. The tool shank head 2 includes a connecting part 21 and a mounting part 22. The connecting part 21 connects the mounting part 22 and the tool shank 1. The mounting part 22 has a clamping groove 25 for mounting the insert 3. The insert 3 is detachably fixed by a fastening mechanism. The insert 3 is a peach-shaped insert, and the mounting part 22 is a peach-shaped mounting part 22 adapted to the peach-shaped insert 3. By using the peach-shaped mounting part 22 to adapt to the peach-shaped insert 3, the tool shank head 2 and the insert 3 work together, enabling precision machining of workpieces 5 with different inner arc sizes and curvatures. like Figure 3 As shown, the fastening mechanism includes a fixing plate 42, a pressure plate 41, and screws. The fixing plate 42 is positioned above the peach-shaped blade 3. One end of the pressure plate 41 is tightly attached to the top of the fixing plate 42, and the other end of the pressure plate 41 is mounted on the connecting part 21. Screw holes are provided at corresponding positions on the mounting part 22, the peach-shaped blade 3, and the fixing plate 42. The fixing plate 42, the peach-shaped blade 3, and the mounting part 22 are fixed from top to bottom by screws 44 engaging with the screw holes. Screw holes are also provided at the ends of the connecting part 21 and the pressure plate 41. The pressure plate 41 and the connecting part 21 are fixed by screws 43 engaging with the screw holes. This fastening mechanism enables precise and reliable installation of the peach-shaped blade 3.

[0021] like Figure 3 As shown, the peach-shaped mounting part 22 includes a front part 24 and a rear part 23 connected to each other, with the thickness of the rear part 23 gradually decreasing from the front part 24; the structure design of being thin at the front end and thick at the rear end allows for more flexible operation during the cutting process. The angle between the side of the rear part 23 and the side of the front part 24 is between 160 and 170 degrees; the angle α between the side of the front part 24 and the parallel direction of the tool holder 1 is between 62 and 67 degrees, and in this embodiment, the preferred angle α is 65 degrees.

[0022] The design of the included angle α is crucial. After numerous experiments and trials, it was finally determined that the included angle α should be between 62 and 67 degrees, with the optimal angle being 65 degrees. Figure 4 As shown, when the included angle α is 65 degrees, the tool can ensure that every corner of the inner arc is cut during the cutting process without interference with the inner arc. However, when the included angle α is not within the range defined by this utility model, such as when the included angle α is 70 degrees, ... Figure 5 As shown, when cutting the outer edge of the inner arc, a large included angle α results in a cutting dead angle at the outer edge of the inner arc, making it impossible to complete the cutting; similarly, when the included angle α is 60 degrees, such as Figure 6 As shown, when cutting the inner edge of an inner arc, the small included angle α causes interference between the front side 24 of the tool's peach-shaped mounting part 22 and the inner edge of the inner arc, resulting in a cutting dead angle and preventing the cutting process from being completed. This invention optimizes the distribution of cutting force during the cutting process by designing the included angle α, achieving precise cutting of the inner arc, effectively improving the wear resistance and chipping resistance of the cutting tool, and significantly extending the tool's machining life. Simultaneously, based on the design of the tool holder and cutting tool, it can adapt to the precision turning requirements of products with various inner arc sizes, broadening the range of machining applications and improving machining versatility and flexibility.

[0023] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A boring tool for machining internal circular arcs, the tool comprising a tool holder and an insert, the tool holder comprising a tool shank and a tool shank head, the tool shank head being used to mount the insert; characterized in that: The tool holder head includes a connecting part and a mounting part. The connecting part is used to connect the mounting part and the tool holder. The mounting part is provided with a clamping groove for mounting a blade. The blade is detachably and fixedly mounted by a fastening mechanism. The blade is a peach-shaped blade. The mounting part is a peach-shaped mounting part adapted to the peach-shaped blade. The peach-shaped mounting part includes a front part and a rear part that are connected to each other. The thickness of the rear part gradually decreases from the front part.

2. A boring tool for machining internal circular arcs as described in claim 1, characterized in that: The fastening mechanism includes a fixing plate, a pressure plate, and a screw; the fixing plate is located above the peach-shaped blade; one end of the pressure plate is close to the top of the fixing plate, and the other end of the pressure plate is mounted on the connecting part.

3. A boring tool for machining internal circular arcs as described in claim 2, characterized in that: The mounting part, the peach-shaped blade, and the fixing plate are all provided with screw holes at their respective positions. The fixing plate, the peach-shaped blade, and the mounting part are fixed from top to bottom by screws that engage with the screw holes.

4. A boring tool for machining internal circular arcs as described in claim 2, characterized in that: Both the connecting part and the end of the pressure plate are provided with screw holes, and the pressure plate and the connecting part are fixed by screws engaging with the screw holes.

5. A boring tool for machining internal circular arcs as described in claim 1, characterized in that: The angle between the rear side and the front side is between 160 and 170 degrees; the angle between the front side and the parallel direction of the tool holder is between 62 and 67 degrees.

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