Ultrasonic cutting tool and cutting machine for honeycomb core round hole machining

Abstract

The utility model provides a kind of ultrasonic cutting tool and cutting machine for honeycomb core round hole processing, comprising: handle, sheet arc-shaped blade body and sheet arc-shaped blade tip;Handle is connected to tool holder;Sheet arc-shaped blade body is connected to handle and extends towards honeycomb core surface, and the projection shape of sheet arc-shaped blade body is circular arc along extension direction;Front end cutting edge is arranged in the front end of sheet arc-shaped blade body;Sheet arc-shaped blade body bottom edge is inclinedly arranged and is provided with circular arc bottom edge;Sheet arc-shaped blade tip is formed by the included angle between circular arc bottom edge and front end cutting edge;The arc-shaped axis of sheet arc-shaped blade body is coaxially arranged with tool holder processing axis.This application can smoothly cut out round hole contour under the ultrasonic vibration of cutting machine, solve the problem that conventional tool cannot completely cut off honeycomb core wall when cutting embedded part round hole contour, leading to honeycomb core deformation, tearing, tool wear, fracture, and cannot be processed in place.

Description

Technical Field

[0001] This utility model belongs to the field of satellite honeycomb panel manufacturing technology, specifically, it relates to an ultrasonic cutting tool and cutting machine for processing round holes in honeycomb cores. Background Technology

[0002] Honeycomb cores, due to their low density, high specific strength, high specific modulus, low coefficient of thermal expansion, and good thermal insulation and energy absorption, are commonly used in honeycomb sandwich panels for satellite structural platforms. In honeycomb panel structures, embedded parts are often required to provide various mechanical interfaces. The common shape of standard embedded parts is generally a cylindrical shape with flanges, thus requiring the cutting of circular holes at corresponding positions in the honeycomb core lattice for the embedded parts. However, the poor rigidity of the honeycomb core wall, its unique topological structure, and mechanical anisotropy result in poor machinability of the honeycomb core lattice. Traditional ultrasonic cutting tools are straight-edged blades. When cutting honeycomb cores, the blade tip's movement path is always consistent with the machining path. However, when machining circular hole contours, the straight-edged blade itself has a certain width. As the blade feeds along the circular contour, the radius of motion of the blade sidewall increases, leading to increased friction between the blade sidewall and the honeycomb core. This easily causes deformation and tearing of the honeycomb core, resulting in product scrap.

[0003] Patent document CN108356299A discloses an ultrasonic cutting tool for machining the curved contour of a honeycomb core, comprising a threaded segment, a stiffness reinforcing block, a trapezoidal transition block, and a thin-plate open blade connected in sequence. The axes of the threaded segment, the stiffness reinforcing block, the trapezoidal transition block, and the thin-plate open blade are all located on the axis of the ultrasonic cutting tool for machining the curved contour of a honeycomb core, and the curved contour of the honeycomb core material is cut under the action of ultrasonic vibration.

[0004] However, the large working range of the cutting tool in patent document CN108356299A can lead to tool wear and breakage, as well as deformation and tearing of the honeycomb core.

[0005] To ensure the smooth cutting of circular hole contours under the ultrasonic vibration of a cutting machine, and to address the problem that conventional tools cannot completely cut through the honeycomb core wall when cutting circular hole contours of embedded parts, leading to honeycomb core deformation, tearing, tool wear and breakage, and incomplete machining, this invention designs an ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores, thus solving the aforementioned problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide an ultrasonic cutting tool and cutting machine for processing round holes in honeycomb cores.

[0007] An ultrasonic cutting tool and cutting machine for processing round holes in a honeycomb core, according to the present invention, includes: a tool holder, a thin arc-shaped blade, and a thin arc-shaped blade tip; The handle is connected to the blade holder; The thin, curved blade is connected to the handle and extends toward the honeycomb core surface. The projected shape of the thin, curved blade along the extension direction is an arc. The front end of the thin, curved blade is provided with a front cutting edge; The thin, curved blade has an inclined bottom edge and a rounded bottom edge. The thin, curved blade tip is formed by the angle between the rounded bottom edge and the front edge. The curved axis of the thin, curved blade is set coaxially with the machining axis of the tool holder.

[0008] Preferably, the wall thickness of the thin arc-shaped blade is 0.5mm-0.8mm, and the kerf width formed by cutting the honeycomb core is 0.5mm-1mm.

[0009] Preferably, the central arc angle of the arc of the thin-film arc-shaped blade is greater than 30° and less than 180°.

[0010] Preferably, the outer diameter of the thin, curved blade is 10mm-30mm.

[0011] Preferably, the cutting angle of the front blade is 15°-60°.

[0012] Preferably, the cutting angle of the rounded bottom edge is 15°-45°.

[0013] Preferably, the included angle of the thin-film curved blade tip is 15°-90°.

[0014] Preferably, the extension length of the thin, curved blade is greater than the required height for cutting the honeycomb core, and the size of the handle corresponds to the blade holder interface.

[0015] Preferably, the material of the thin, curved blade is cemented carbide.

[0016] According to the present invention, a cutting machine is provided, which employs the ultrasonic cutting tool and cutting machine for processing round holes in honeycomb cores.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The height and thickness of the thin arc-shaped blade can be designed according to the specifications of the honeycomb, which can improve the processing quality of the honeycomb core when processing round holes. It solves the problem that traditional planar ultrasonic cutting tools cannot effectively cut the outline of embedded holes, and replaces the traditional manual cutting method of honeycomb core round holes, reducing the labor intensity of personnel and improving production efficiency and product quality.

[0018] 2. The arc-shaped cutter body can reduce the friction between the cutter and the honeycomb core when cutting circular contours and increase the rigidity of the cutter. This reduces the deformation and tearing of the honeycomb core when cutting circular holes, as well as the wear of the cutter and the probability of cutter breakage, thereby increasing the service life of the cutter and achieving high-quality cutting of circular holes in honeycomb core embedded parts. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the cutting tool of this utility model.

[0020] Figure 2 This is a schematic diagram of the cutting tool's motion path in this utility model.

[0021] Figure 3 This is a schematic diagram of the cutting tool's motion path in this utility model.

[0022] The diagram shows 1 as the knife; 2 as the handle; 3 as the front cutting edge; 4 as the thin, curved blade; 5 as the thin, curved tip; 6 as the rounded bottom edge; and 7 as the back of the blade. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figure 1 As shown, an ultrasonic cutting tool and cutting machine for processing round holes in honeycomb cores includes: a handle 2, a thin arc-shaped blade 4, and a thin arc-shaped blade tip 5.

[0025] The tool holder 2 is connected to the tool holder, and the size of the tool holder 2 corresponds to the interface setting of the tool holder.

[0026] The thin, curved blade 4 is connected to the handle 2 and extends toward the surface of the honeycomb core. The extension length of the thin, curved blade 4 is greater than the required height of the honeycomb core to be cut, in order to accommodate vibration cutting. The projected shape of the thin, curved blade 4 along the extension direction is an arc shape. The arc center angle of the arc of the thin, curved blade 4 is greater than 30° and less than 180°. The outer diameter of the arc of the thin, curved blade 4 is 10mm-30mm. The wall thickness of the thin, curved blade 4 is 0.5mm-0.8mm. The kerf width formed by cutting the honeycomb core is 0.5mm-1mm. The material of the thin, curved blade 4 is cemented carbide, preferably tungsten steel.

[0027] The front end of the thin, curved blade 4 is provided with a front cutting edge 3, and the cutting angle α of the front cutting edge 3 is 15°-60°.

[0028] The thin, curved blade 4 has an inclined bottom edge and a circular bottom edge 6, with the opening angle β of the circular bottom edge 6 being 15°-45°.

[0029] The thin, curved blade tip 5 is formed by the angle between the rounded bottom edge 6 and the front edge 3. The included angle γ of the thin, curved blade tip 5 is 15°-90°. The angle of the thin, curved blade tip 5 further reduces the friction between the blade and the honeycomb core wall during cutting.

[0030] The arc axis of the thin-bladed arc-shaped cutter body 4 is set coaxially with the machining axis of the circular travel machining tool holder.

[0031] The height and thickness of the thin arc-shaped blade 4 can be designed according to the specifications of the honeycomb, which can improve the processing quality of the honeycomb core when processing round holes. It solves the problem that traditional planar ultrasonic cutting tools cannot effectively cut the outline of embedded holes, and replaces the traditional manual cutting method of honeycomb core round holes, reducing the labor intensity of personnel and improving production efficiency and product quality.

[0032] like Figure 2 , 3 As shown, the working principle of this embodiment is as follows: Step S1: Adjust the rotation angle around the axis of the cutter 1 on the cutter holder, adjust the feed direction V1 through the cutting equipment to ensure that the feed depth is greater than the height of the honeycomb core, and set the initial starting point of the cutter 1.

[0033] Step S2: An ultrasonic vibration in the direction V3 is generated under the action of the motor. The ultrasonic vibration drives the tool 1 to reciprocate with a small displacement in the direction V3. At the same time, the tool holder drives the tool 1 to feed continuously in the honeycomb core along the predetermined path in the direction V2 of rotation around the axis, so as to feed directly along the actual contour without repeated cutting to approach, and the processing speed is faster.

[0034] Step S3: After cutting along the predetermined path, the tool 1 exits from the feed direction V1 and continues to cut the next round hole. Compared with the insertion cutting and milling method for processing honeycomb cores, vibration cutting is more efficient in processing the round hole contour.

[0035] Preferably, in step S2: The front cutting edge 3 is inserted into the honeycomb core from the starting point of the circular outline. The front cutting edge 3 cuts along the circular cutting path and returns to the starting point.

[0036] While the cutting tool 1 is subjected to high-frequency ultrasonic vibration, its arc-shaped bottom edge 6 is inserted into the honeycomb core and cuts off the honeycomb core wall. Subsequently, the ultrasonically vibrating tool 1 feeds along a predetermined path to achieve the purpose of cutting the honeycomb core. The arc-shaped blade can reduce the friction between the tool 1 and the honeycomb core when cutting the circular contour and improve the rigidity of the tool 1, thereby reducing the deformation and tearing of the honeycomb core when cutting the circular hole, the wear of the tool 1, and reducing the probability of tool 1 breakage, thus improving the service life of the tool 1 and achieving high-quality cutting of the circular hole of the honeycomb core embedded part.

[0037] This embodiment also provides a cutting machine, which uses the ultrasonic cutting tool and cutting machine described above for processing round holes in honeycomb cores.

[0038] The thin, curved blade 4 can smoothly cut out the outline of the round hole under the ultrasonic vibration of the cutting machine, which solves the problem that conventional tools cannot completely cut the honeycomb core wall when cutting the outline of the round hole of the embedded part, resulting in deformation and tearing of the honeycomb core and failure to process it properly. It replaces the manual cutting when cutting the round hole of the embedded part, and realizes high-quality and high-efficiency cutting of the round hole of the honeycomb core.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0040] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores, characterized in that, include: The handle (2), the thin curved blade (4), and the thin curved tip (5); The handle (2) is connected to the tool holder; The thin, curved blade (4) is connected to the handle (2) and extends toward the honeycomb core surface. The projected shape of the thin, curved blade (4) along the extension direction is an arc shape. The front end of the thin, curved blade (4) is provided with a front cutting edge (3); The thin, curved blade (4) has an inclined bottom edge and a rounded bottom edge (6); The thin, curved blade tip (5) is formed by the angle between the rounded bottom edge (6) and the front edge (3); The arc axis of the thin arc-shaped cutter body (4) is set coaxially with the machining axis of the tool holder.

2. The ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores according to claim 1, characterized in that, The wall thickness of the thin arc-shaped blade (4) is 0.5mm-0.8mm, and the kerf width formed by cutting the honeycomb core is 0.5mm-1mm.

3. The ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores according to claim 1, characterized in that, The arc-shaped blade (4) has a central arc angle greater than 30° and less than 180°.

4. The ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores according to claim 1, characterized in that, The outer diameter of the thin arc-shaped blade (4) is 10mm-30mm.

5. The ultrasonic cutting tool and cutting machine for processing circular holes in a honeycomb core according to claim 1, characterized in that, The cutting angle of the front blade (3) is 15°-60°.

6. The ultrasonic cutting tool and cutting machine for processing circular holes in a honeycomb core according to claim 1, characterized in that, The opening angle of the arc-shaped bottom edge (6) is 15°-45°.

7. The ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores according to claim 1, characterized in that, The included angle of the thin, curved blade tip (5) is 15°-90°.

8. The ultrasonic cutting tool and cutting machine for processing circular holes in honeycomb cores according to claim 1, characterized in that, The thin, curved blade (4) extends to a length greater than the required height of the honeycomb core to be cut, and the size of the handle (2) corresponds to the size of the blade holder interface.

9. The ultrasonic cutting tool and cutting machine for processing circular holes in a honeycomb core according to claim 1, characterized in that, The material of the thin, curved blade (4) is cemented carbide.

10. A cutting machine, characterized in that, The ultrasonic cutting tool for processing circular holes in a honeycomb core, as described in any one of claims 1-9, is used.

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