Shredding cutter of filament placement machine

Abstract

The utility model provides a shredding cutter of a filament placement machine, which relates to the technical field of composite material filament placement devices and comprises a cutter body, a cutter head and a mounting part. The cross section of the cutter body is rectangular, one end of the cutter body is provided with a cutter head, the other end of the cutter body is provided with a mounting part fixedly connected with a fiber placement machine head, the surface of the cutter head is in a slope shape, the transverse length of the cutter head is 5-55cm, the cutting edge inclination angle alpha of the cutter head is 10-70 degrees, the cutting edge inclination angle alpha is an included angle between an inclined cutter face and a horizontal line, and the front angle beta of the cutter head is 90-150 degrees. The rake angle beta is the inclination angle of the front end of the cutter face. The technical problems that in the prior art, shearing force of a straight-blade-shaped cutting knife is not concentrated, and a V-shaped cutting knife is not suitable for being integrated on a tow placement machine head due to the large size are solved, and the technical effect of improving the shearing force of tows is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of composite material fiber placement equipment, and in particular to a fiber placement machine cutting blade. Background Technology

[0002] A fiber placement machine is a specialized piece of equipment used in the manufacturing process of composite materials. It lays continuous fiber bundles or strips onto a mandrel according to a pre-set path, treats them with pre-impregnated resin or adhesive, and cures them at a specific temperature to form the desired shape. This equipment combines the advantages of automated narrow strip placement and forming technology with automated fiber bundle placement technology, enabling precise control and high-efficiency production of composite components. During the fiber placement process, several fiber bundles are unwound from their respective spools and conveyed to the placement head via a fiber bundle conveying system. Then, pressure rollers lay the carbon fibers onto the workpiece surface. During this process, the fiber bundles need to be cut. The fiber placement machine cutter is a key component used for precisely cutting the pre-impregnated fiber bundles. It is typically small in size and precisely designed to ensure accurate cutting of the fiber bundles during high-speed placement.

[0003] Existing cutting blades are generally either straight-bladed or use a V-shape formed by the gap between two blades for shortening. While the first type, the straight-bladed blade, produces a relatively clean cut, the filaments are positioned perpendicular to the blade, and the blade cuts laterally, directly impacting the filaments. This results in uneven shearing force, increased shearing resistance, and reduced shearing efficiency. Furthermore, frequent cutting on the filament-laying machine reduces the blade strength. The second type, the V-shaped blade, requires two blades arranged in a scissor shape. However, in high-precision filament-laying machines used in aircraft manufacturing, the overall structure is complex, and these machines typically lower four filaments simultaneously, making it difficult to centrally mount the V-shaped blades on the machine head. Therefore, existing technologies lack a cutting blade that can improve the shearing force on the filaments while maintaining the integrated dimensions of the filament-laying machine. Utility Model Content

[0004] The purpose of this invention is to provide a filament cutting blade for a filament laying machine, which alleviates the technical problems of uneven shearing force of straight-blade blades and the large size of V-shaped blades that are not suitable for integration into the head of a filament laying machine.

[0005] This utility model provides a filament cutting blade for a filament laying machine, comprising: a blade body, a blade head, and a mounting part;

[0006] The cross-section of the blade is rectangular. One end of the blade is equipped with a cutting head, and the other end of the blade is equipped with a mounting part that is fixedly connected to the head of the wire laying machine. The surface of the cutting head is beveled. The transverse length of the cutting head is 5cm to 55cm. The blade inclination angle α of the cutting head is 10° to 70°. The blade inclination angle α is the angle between the inclined blade surface and the horizontal line. The rake angle β of the cutting head is 90° to 150°. The rake angle β is the inclination angle of the front end of the cutting head.

[0007] Furthermore, the connection between the blade 1 and the blade head 2 consists of a first curved section, a second curved section, and a third curved section;

[0008] The first curved portion is an outwardly curved protrusion along the cutting blade's forward direction, the second curved portion 102 is an inwardly curved recess perpendicular to the cutting blade's forward direction, and the third curved portion 103 is an outwardly curved recess perpendicular to the cutting blade's forward direction.

[0009] Furthermore, the first, second, and third curved portions are all arc-shaped.

[0010] Furthermore, the mounting section is located on the blade, and the mounting section includes a connected rectangular section and a slot section.

[0011] Furthermore, the edges of the blade are rounded.

[0012] Furthermore, the Rockwell hardness of the blade and tip is not less than 50 HRC.

[0013] Furthermore, the blade and the tip are formed as a single piece.

[0014] Furthermore, the longitudinal length of the blade is 1cm to 10cm.

[0015] Furthermore, the longitudinal length of the blade is 1.5m to 50cm.

[0016] Furthermore, the lateral length of the blade is 5cm to 55cm.

[0017] Beneficial effects:

[0018] This utility model provides a filament cutting knife for a filament laying machine, including a rectangular cross-section of the blade body, a cutting head at one end of the blade body, and a mounting part at the other end of the blade body that is fixedly connected to the head of the filament laying machine. The groove of the mounting part improves the coaxiality between the blade body and the mounting shaft, and the mounting plate locks the blade body in place, making it easy to disassemble and install the blade body. The integrated connection between the blade body and the cutting head improves the structural compactness.

[0019] The cutter head has a beveled surface with a lateral length of 5cm to 55cm. This beveled design better guides the cutting force, allowing the cutter head to cut into the filament bundle at a faster speed, effectively improving cutting efficiency. The lateral length of the cutter head matches the lateral length of the filament bundle, ensuring that every part of the filament bundle is cut evenly during the cutting process, thus improving cutting accuracy. The cutter head's inclination angle α is 10° to 70°, where α is the angle between the inclined cutter face and the horizontal line. The rake angle β is 90° to 150°, where β is the inclination angle of the front end of the cutter head. These inclination angles create an inclined surface, with one pointed end preferentially contacting the filament bundle surface for rapid cutting. This improves the sharpness and strength of the cutter head, increasing the cutting rate. Compared to straight-blade cutters that cut the filament bundle face-to-face, this design provides a better cutting effect. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the filament cutting blade for a filament laying machine provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the back of the filament cutting blade of the filament laying machine provided in an embodiment of this utility model;

[0023] Figure 3 A top view of the filament cutting blade of the filament laying machine provided in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the blade inclination angle α in the filament cutting blade of the filament laying machine provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the rake angle β of the filament cutting blade of the filament laying machine provided in an embodiment of this utility model.

[0026] Icons: 1 - Blade; 101 - First bend; 102 - Second bend; 103 - Third bend; 2 - Blade head; 3 - Mounting part; 301 - Rectangular part; 302 - Slot part. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0033] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a filament cutting knife for a filament laying machine, including: a blade body 1, a blade head 2, and a mounting part 3;

[0035] The cross-section of the blade 1 is rectangular. One end of the blade 1 is provided with a blade head 2, and the other end of the blade 1 is provided with a mounting part 3 that is fixedly connected to the head of the wire laying machine. The surface of the blade head 2 is beveled. The transverse length of the blade head 2 is 5cm to 55cm. The blade inclination angle α of the blade head 2 is 10° to 70°. The blade inclination angle α is the angle between the blade surface inclination and the horizontal line. The rake angle β of the blade head 2 is 90° to 150°. The rake angle β is the inclination angle of the front end of the blade.

[0036] Specifically, the cross-section of the blade 1 is rectangular, providing good structural stability and saving space, meeting the precision dimensional requirements of the filament placement machine. A groove is formed at one end of the blade 1 as a mounting part 3, allowing it to be fixedly installed with the filament placement head and controlling the extension and retraction of the blade 1 to cut the filament bundle. A cutter head 2 is integrally formed at the other end of the blade 1, providing a smoother and more precise cutting surface. The lateral length of the cutter head 2 is 5cm to 55cm, enabling it to precisely cut the filament bundle, ensuring that the cutting width matches the filament bundle width and reducing material waste. Regardless of the size of the filament bundle being cut, the cutter head 2 is positioned to cut in a point-breaking manner.

[0037] like Figure 4 , Figure 5 As shown, the surface of the cutter head 2 is beveled, meaning the front surface of the cutter head 2 is an inclined parallelogram. This better guides the cutting force, allowing the cutter head 2 to cut into the wire bundle at a faster speed, effectively improving cutting efficiency. Simultaneously, the angle between the upper edge of the inclined surface of the cutter head 2 and the horizontal line, i.e., the inclination angle α, is 10°–70°. This allows the cutter head 2 to directly cut into the wire bundle from the protruding point on the upper edge, achieving point-to-surface cutting, increasing the cutting rate while preventing the wire bundle from being pulled apart. The rake angle β of the inclined front end of the cutter head 2 is 90°–150°, which, combined with the aforementioned inclination angle α, enables the cutter head 2 to provide a smoother and more precise cutting surface for the wire bundle.

[0038] In an embodiment of this utility model, the connection between the blade 1 and the blade head 2 is a first curved portion 101, a second curved portion 102, and a third curved portion 103;

[0039] The first curved portion 101 is an outwardly curved protrusion along the cutting blade's forward direction, the second curved portion 102 is an inwardly curved recess perpendicular to the cutting blade's forward direction, and the third curved portion 103 is an outwardly curved recess perpendicular to the cutting blade's forward direction.

[0040] The first curved portion 101, the second curved portion 102, and the third curved portion 103 are all arc-shaped.

[0041] Specifically, three bends are formed at the connection between the blade body 1 and the cutter head 2. When the cutter extends forward to cut into the filament, due to inertia or mechanical action, the cutter head 2 will continue to move forward, and the blade body 1 will also move forward to contact the surface of the filament. At this time, the three bends prevent the blade body 1 from interfering with the contact of the filament. Among them, the first bend 101 bends downward along the forward direction of the cutter head 2 to form a protrusion, which prevents scratching the surface of the filament when it comes into contact with it, thus preventing it from affecting the refeeding. The second bend 102 is an inward concave bend that is longitudinally perpendicular to the forward direction of the cutter, and the third bend 103 is an outward bend that is transversely perpendicular to the forward direction of the cutter. The second bend 102 and the third bend 103 together achieve the arc connection between the blade body 1 and the cutter head 2, preventing right angles or sharp angles from causing filament snagging.

[0042] The first curved portion 101 and the third curved portion 103 are arc-shaped, which reduces the contact area between the blade 1 and the wire bundle during the cutting process, thereby reducing the possibility of interference. The second curved portion 102 is arc-shaped, which helps to prevent the accumulation of wire debris and ensures smooth discharge of wire debris, taking into account the wire debris generated during the cutting process.

[0043] In this utility model, the mounting part 3 is provided on the blade 1, and the mounting part 3 includes a connected rectangular part 301 and a slot part 302.

[0044] Specifically, a groove is formed on the end surface of the blade 1 as a mounting part 3, using a snap-fit ​​method instead of a traditional fixed connection, making connection and disassembly more convenient. The rectangular part 301 is used to connect with the mounting part of the filament placement machine head, while the radial dimension of the slot part 302 is smaller than that of the rectangular part 301 to achieve an embedding function. This allows for fixed installation with the filament placement head via the mounting part 3, controlling the extension and retraction of the blade 1 to cut the filament bundle.

[0045] In this invention, the edge of the blade 1 is rounded.

[0046] The Rockwell hardness of the blade 1 and the tip 2 is not less than 50 HRC.

[0047] The blade 1 and the blade tip 2 are formed as one piece.

[0048] Specifically, setting rounded chamfers at the edges of the blade 1 can reduce the sharpness of the blade 1 edges and reduce the possibility of scratching the wire bundle during operation.

[0049] The blade body 1 and the cutter head 2 are integrally formed, and the Rockwell hardness is not less than 50 HRC. This is because the filament placement machine is a high-frequency cutting device, and the cutter head 2 needs to cut the filament bundle frequently. By using a hardness higher than that of ordinary steel blades, the wear of the cutter head 2 is reduced, ensuring that the life of the cutter head 2 is not less than 5000 cuts. At the same time, the integral forming reduces the seam between the blade body 1 and the cutter head 2, improving the overall strength and stability of the tool, making it suitable for the high-precision internal structure of the filament placement machine head.

[0050] In this invention, the longitudinal length of the blade 2 is 1cm to 10cm.

[0051] The longitudinal length of the blade 1 is 1.5cm to 50cm.

[0052] The horizontal length of blade 1 is 5cm to 55cm.

[0053] Specifically, the longitudinal length of the cutter head 2 is 1cm to 10cm, which is the height of the cutter head 2; the longitudinal length of the cutter body 1 is 1.5cm to 50cm, which is the height of the cutter head 2, providing sufficient support and strength. The transverse length of the cutter body 1 is 5cm to 55cm, which helps to provide a stable cutting platform on the wire laying machine and ensures strength while opening the mounting part 3.

[0054] Based on the above embodiments, the working process of the filament cutting blade of the filament laying machine provided in this utility model embodiment is as follows:

[0055] The mounting part 3 is connected to the power unit of the filament laying machine head to enable the extension or insertion of the cutter head 2. The end of the cutter head 2 is inclined, which achieves the effect of breaking the surface by a point while contacting the filament bundle, thereby improving the cutting efficiency of the filament bundle.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A topper knife for a fiber placement machine, the topper knife comprising: The utility model relates to a cutting tool, which comprises a blade body (1), a blade head (2) and a mounting part (3). The cross section of the blade body (1) is rectangular, one end of the blade body (1) is provided with the blade head (2), the other end of the blade body (1) is provided with the mounting part (3) which is fixedly connected with a filament laying machine head, the surface of the blade head (2) is inclined, the transverse length of the blade head (2) is 5cm-55cm, the blade rake angle of the blade head (2) is 10°-70°, the blade rake angle is the included angle between the inclined blade surface and the horizontal line, the blade front angle of the blade head (2) is 90°-150°, and the blade front angle is the inclination angle of the front end of the blade surface. The connecting part between the blade body (1) and the blade head (2) is a first curved part (101), a second curved part (102) and a third curved part (103).

2. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The first curved part (101) is an outward curved protrusion along the forward direction of the cutting tool, the second curved part (102) is an inward curved recess perpendicular to the forward direction of the cutting tool in the longitudinal direction, and the third curved part (103) is an outward curved recess perpendicular to the forward direction of the cutting tool in the transverse direction. The first curved part (101), the second curved part (102) and the third curved part (103) are all in the shape of a circular arc.

3. The fiber-slicing cutter of a fiber placement machine according to claim 2, wherein, The mounting part (3) is provided on the blade body (1), and the mounting part (3) comprises a rectangular part (301) and a clamping groove part (302) which are in communication.

4. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The edge of the blade body (1) is circularly chamfered.

5. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The Rockwell hardness of the blade body (1) and the blade head (2) is not less than 50HRC.

6. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The blade body (1) and the blade head (2) are integrally formed.

7. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The longitudinal length of the blade head (2) is 1cm-10cm.

8. The fiber-slicing cutter of a fiber placement machine according to claim 1, wherein, The longitudinal length of the blade body (1) is 1.5cm-50cm.

9. The fiber-slicing cutter of a fiber placement machine according to claim 8, wherein, The transverse length of the blade body (1) is 5cm-55cm.

10. The fiber-slicing cutter of a fiber placement machine according to claim 9, wherein, ​

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