Novel ultrasonic straight-blade knife

Abstract

The utility model discloses a novel ultrasonic straight-edge knife which comprises a knife holder and a rectangular blade, the rear end portion of the rectangular blade is fixedly connected to the knife holder, and the two faces, in the thickness direction, of the front end portion of the rectangular blade are respectively provided with a knife point edge face so that a knife point front edge can be formed at the front end portion of the rectangular blade. Side cutting edge surfaces are respectively arranged on the two sides of the rectangular blade in the thickness direction, so that side cutting edges are respectively formed on the two sides of the rectangular blade. According to the novel ultrasonic straight-edge cutter, the ultrasonic conduction effect is improved, meanwhile, the cutter can be prevented from being squeezed and broken, and the quality of the machined surface of a wave-absorbing honeycomb material is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ultrasonic machining, especially to a novel ultrasonic straight blade knife. BACKGROUND

[0002] In the field of aerospace, the quality of the aircraft has been an important condition to determine the advantages and disadvantages of the aircraft. Among the hottest research directions in the field of international aerospace materials, high-strength and lightweight honeycomb materials have been the best among numerous achievements. In recent years, the performance of the wave-absorbing honeycomb, which has gradually occupied the leading position in the field of honeycomb materials, is the best. The wave-absorbing honeycomb is a very special material, which has higher strength and stiffness than traditional aramid paper honeycomb, and has the functions of reflecting and scattering sound waves and electromagnetic waves, as well as a series of characteristics such as low deformation, high temperature resistance, chemical corrosion resistance, flame retardance, excellent electrical insulation performance, etc. It has been widely used in the field of aerospace. The wave-absorbing honeycomb material is a porous honeycomb structure of fiber material, which can withstand a large stress in the axial direction of the honeycomb core and has high stiffness and strength, but can only withstand a small stress in the radial direction of the core and is extremely prone to deformation. At the same time, due to the multi-layer coating structure of the skin layer, the wave-absorbing layer, and the reflecting layer on the outer surface of the wave-absorbing honeycomb, it has good reflection and scattering performance for sound waves and electromagnetic waves.

[0003] When processing the wave-absorbing honeycomb material, due to the multi-layer wave-absorbing fiber coating structure, the use of traditional high-speed milling processing method for processing the honeycomb material is easy to cause the fiber scraps to entangle the tool and the fiber coating to stick to the tool, thereby hindering the processing and causing the honeycomb workpiece to tear and produce burr appearance defects.

[0004] For the processing of wave-absorbing honeycomb material, the current best solution is ultrasonic assisted cutting processing. The basic principle of this technology is to use ultrasonic energy to conduct the honeycomb cutting tool at a certain frequency, so that the tool produces axial ultrasonic frequency mechanical vibration. This vibration can easily destroy the internal structure of the wave-absorbing honeycomb material to achieve the purpose of cutting. Considering the influence of amplitude, frequency, intensity, and processing technology, the commonly used ultrasonic cutting tool is often a triangular honeycomb cutting tool. Considering the diversity of processing technology, while considering amplitude, frequency, and intensity to ensure the stability of cutting. However, when using the existing triangular honeycomb cutting tool to process the wave-absorbing honeycomb material, the tool is prone to breakage, and the surface quality of the wave-absorbing honeycomb material still needs to be improved.

[0005] The disclosure of the above Background Art is only used to assist in understanding the ideas and technical solutions of the present application, and does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. Summary of the Invention

[0006] To solve the above problems, the present application provides a novel ultrasonic straight blade knife, which improves the ultrasonic wave conduction effect, avoids extrusion and breakage of the knife, and further improves the machining surface quality of the wave-absorbing honeycomb material.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] The present application discloses a novel ultrasonic straight blade knife, comprising a knife seat and a rectangular blade, the rear end of the rectangular blade is fixedly connected to the knife seat, the front end of the rectangular blade is provided with a blade tip edge on both sides in the thickness direction to form a blade tip front edge at the front end of the rectangular blade, and the two sides of the rectangular blade are respectively provided with a side blade edge on both sides in the thickness direction to form a side blade edge on both sides of the rectangular blade.

[0009] Further, the included angle between the side blade edges on both sides of the rectangular blade in the thickness direction is 27°-35°.

[0010] Further, the thickness of the rectangular blade gradually decreases from the rear end to the front end.

[0011] Further, the thickness of the root of the blade tip edge on the rectangular blade is 1 / 3-2 / 3 of the thickness of the rear end of the rectangular blade.

[0012] Further, the rectangular blade is surrounded by the blade tip edge and the side blade edges on both sides in the thickness direction to form a main body surface, and the included angle between the main body surfaces on both sides of the rectangular blade in the thickness direction is 0.5°-2.5°.

[0013] Further, the length of the side blade on both sides of the rectangular blade is 25mm-35mm.

[0014] Further, the rectangular blade is axisymmetric along the length direction from the rear end to the front end.

[0015] Further, the rear end of the rectangular blade is connected to the knife seat by soldering.

[0016] Further, the width of the rectangular blade is 0.9-1.5 times the width of the knife seat.

[0017] Further, the two opposite surfaces of the front end of the tool holder in the thickness direction are provided with a rounded structure.

[0018] Compared with the prior art, the novel ultrasonic straight blade knife has the advantages that: the blade is in a rectangular shape, the three side edges of the rectangular blade are all provided with cutting edges except the rear end part fixedly connected to the tool holder, the rectangular groove pattern in the wave-absorbing honeycomb material can be well machined in normal cutting processing, the novel ultrasonic straight blade knife can meet the process requirements in honeycomb processing, the pressure on the non-edge surface of the wave-absorbing honeycomb material can be reduced, the lateral extrusion force caused by the rigidity of the wave-absorbing honeycomb material in the shovel cutting processing can be reduced, the ultrasonic conduction effect is improved, and the wave-absorbing honeycomb material is prevented from being extruded and broken, so that the machining surface quality of the wave-absorbing honeycomb material is further improved, and the machining cost is reduced.

[0019] In further schemes, the novel ultrasonic straight blade knife has the following advantages:

[0020] (1) The angle of the side cutting edge and the angle of the main body surface of the two opposite surfaces of the rectangular blade in the thickness direction are respectively set to be within a corresponding predetermined range, so that the taper angle has good advantages for the transmission of ultrasonic performance, the phenomenon of ultrasonic vibration stress concentration is avoided, the stability of the tool is ensured, and the machining quality of the wave-absorbing honeycomb material surface is further improved.

[0021] (2) The front end of the tool holder is respectively provided with a rounded structure on the two opposite surfaces in the thickness direction, so that the phenomenon of excessive stress concentration of the tool in ultrasonic vibration is reduced, the stress generation area is dispersed, the stability and service life of the tool are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is an exploded structure schematic view of the novel ultrasonic straight blade knife disclosed by the embodiment one of the present application;

[0023] Figure 2 is Figure 1 a structure schematic view of the rectangular blade of the novel ultrasonic straight blade knife in

[0024] Figure 3 is a side view of the rectangular blade;

[0025] Figure 4 is a cross-sectional view of the rectangular blade;

[0026] Figure 5 is Figure 1 a structure schematic view of the tool holder of the novel ultrasonic straight blade knife in

[0027] Figure 6 is the end surface schematic view of the tool holder;

[0028] Figure 7 is the schematic view of the new ultrasonic straight blade tool for spade cutting of the workpiece;

[0029] Figure 8a is the structural schematic view of the new ultrasonic straight blade tool according to the second embodiment of the present utility model;

[0030] Figure 8b is the front view of the new ultrasonic straight blade tool; Figure 8a

[0031] is the side view of the new ultrasonic straight blade tool; Figure 8c Figure 8a is the structural schematic view of the new ultrasonic straight blade tool according to the third embodiment of the present utility model;

[0032] Figure 9a is the front view of the new ultrasonic straight blade tool;

[0033] Figure 9b Figure 9a

[0034] Figure 9c is the side view of the new ultrasonic straight blade tool. Figure 9a BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 100, the new ultrasonic straight blade tool;

[0036] 10, the tool holder; 11, the tool groove; 12, the front end surface of the tool holder; 13, the wrench clamping position; 14, the tool holder guide; 15, the tool holder thread; 16, the rounded structure;

[0037] 20, the rectangular blade; 21, the blade tip surface; 211, the blade tip front edge; 22, the side blade surface; 221, the side blade; 23, the main body surface; 24, the blade root;

[0038] 30, the solder;

[0039] 200, the workpiece; 201, the workpiece groove.

[0040] DETAILED DESCRIPTION

[0041] The following detailed description of the embodiments of the present utility model should be emphasized, which is only exemplary and is not intended to limit the scope and application of the present utility model.

[0042] ​​​​It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for circuit / signal communication.

[0043] It is to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positions based on the directions or positions shown in the drawings and are used for convenience in describing the present application and simplifying the description, and thus cannot be construed as indicating or implying that a device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be construed as limiting the present application.

[0044] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or an implied indication of the number of technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0045] In order to facilitate the description of the positional relationship between the structures, the "front" described in the embodiments of the present application refers to the direction of the position of the tip of the novel ultrasonic straight blade cutter, and the "back" refers to the direction opposite to the "front".

[0046] The preferred embodiment of the present application proposes a novel ultrasonic straight blade cutter, which can adapt to the process requirements in various honeycomb machining, and at the same time, can reduce the pressure on the non-edge surface when machining wave-absorbing honeycomb materials, reduce the lateral extrusion force generated by the rigidity of the wave-absorbing honeycomb materials during spade cutting machining, improve the ultrasonic conduction effect while avoiding extrusion and breaking of the rectangular cutter, thereby further improving the machining surface quality of the wave-absorbing honeycomb materials and reducing the machining cost.

[0047] As shown in Figure 1 Embodiment one of the present application discloses a novel ultrasonic straight blade cutter 100, which comprises a cutter seat 10 and a rectangular blade 20. The rear end of the rectangular blade 20 is fixedly connected to the cutter seat 10. In combination Figure 2 The front end of the rectangular blade 20 is provided with two tip edges 21 on both sides in the thickness direction to form a tip front edge 211 at the front end of the rectangular blade 20. The two sides of the rectangular blade 20 are respectively provided with two side blade edges 22 on both sides in the thickness direction to form a side blade edge 221 at the two sides of the rectangular blade 20.

[0048] Combining Figure 3 And Figure 4 The angle between the two sides of the rectangular blade 20 in the thickness direction between the two side blade surfaces 22 of the two sides is β; the two opposite sides of the rectangular blade 20 in the thickness direction are surrounded by the nose blade surface 21 and the two side blade surfaces 22 of the two sides to form the body surface 23, and the angle between the two body surfaces 23 of the two opposite sides of the rectangular blade 20 in the thickness direction is α; the thickness at the intersection of the nose blade surface 21 and the body surface 23 (i.e. the thickness at the root of the nose blade surface 21) is C, and the thickness at the intersection of the blade root 24 of the rectangular blade 20 (i.e. the thickness at the rear end of the rectangular blade 20) and the body surface 23 (i.e. the thickness at the rear end of the rectangular blade 20) is B. In this embodiment, in order to better transmit ultrasonic energy and cut the wave-absorbing honeycomb material, the value of β is in the range of 27°-35°, and the value of α is in the range of 0.5°-2.5°; wherein the thickness of the rectangular blade 20 gradually decreases in the direction from the rear end to the front end, and the angle α between the two body surfaces 23 of the two opposite sides of the rectangular blade 20 in the thickness direction can effectively alleviate the downward entangling and cutting extrusion force of the two sides of the nose blade surface 21, and the extrusion force is gradually increased from the thickness C to the thickness B, which can reduce the sudden change of instantaneous extrusion force and make the instantaneous change of tool stress, and effectively prolong the tool life during the buffering process. Among them, the thickness C is greater than or equal to 1 / 3 of the thickness B, so as to ensure the vibration intensity of the rectangular blade, and the total length L of the side blade 221 of the rectangular blade 20 is between 25mm-35mm. Specifically, the thickness C is 1 / 3-2 / 3 of the thickness B, so as to ensure the good structural stability of the tool under the ultrasonic high-intensity vibration, and at the same time, improve the strength of the blade root to better transmit ultrasonic energy.

[0049] The rectangular blade 20 is axisymmetric along the axis in the length direction from the rear end to the front end, so as to ensure that the ultrasonic output transmission performance reaches the best state. The material of the rectangular blade 20 should be selected as cemented carbide to improve the hardness and wear resistance of the tool.

[0050] As Figure 5As shown, the front end of the tool holder 10 is provided with a tool groove 11, the tool groove 11 is arranged at the middle position of the tool holder front end face 12, the front end of the tool holder 10 is provided with a wrench clamping position 13, the side of the front end of the tool holder 10 opposite to the tool holder front end face 12 is provided with a tool holder guide 14, and the tool holder guide 14 extends to the rear side and is provided with a tool holder thread 15, wherein the tool holder guide 14 cooperates with the tool handle guide to ensure the coaxiality of the tool and the accuracy of the ultrasonic performance transmission, the wrench is clamped at the wrench clamping position 13 of the tool holder 10 to pre-tighten, and the tool holder thread 15 is coupled and pre-tightened on the amplitude bar of the ultrasonic tool handle. The cooperation accuracy of the tool holder guide 143 and the amplitude bar guide of the tool handle needs to be higher than six levels of accuracy; the pre-tightening force of the wrench pre-tightening the wrench clamping position 13 of the tool holder 10 is determined by referring to the size value of different threads in the national standard to determine the size of the torque value; and the strength grade of the tool holder thread 15 needs to be higher than 10.9 grade, so as to ensure that the ultrasonic vibration transmitted through the tool holder thread 15 does not affect the vibration stability of the rectangular blade 20.

[0051] The rear end of the rectangular blade 20 is welded and connected to the tool holder 10 by the welding material 30. Specifically, the rear end of the rectangular blade 20 is installed and placed in the tool groove 11 of the tool holder 10, and the welding material 30 penetrates into the tool groove 11 under high-temperature melting conditions to uniformly wrap the blade root 24 of the rectangular blade 20, and the welding material 30 generates a good connection and support effect on the rectangular blade 20 after cooling and solidification. After the rectangular blade 20 is installed on the tool holder 10, the side cutting edges 221 on both sides of the rectangular blade 20 are perpendicular to the tool holder front end face 12 of the tool holder 10. Among them, the welding position generally needs to be rounded, and virtual welding, welding and other phenomena need to be avoided during welding; the final style of welding is a full and smooth welding point as the final evaluation standard.

[0052] As shown in Figure 4 and Figure 6 In this embodiment, the maximum width value M of the rectangular blade 20 and the width value D of the tool holder satisfy M=0.969×D.

[0053] Figure 7 As shown in the process example diagram of the ultrasonic straight blade tool 100 disclosed in the first embodiment of the utility model for spade cutting of the machining workpiece 200, the width Y of the workpiece groove 201 of the machining workpiece 200 is usually 1.5-2 times the thickness C of the thinnest part of the rectangular blade 20, and the length Y of the workpiece groove 201 is at least 1.5 times the width M of the rectangular blade 20. Under this size, the vibration direction of the ultrasonic straight blade tool 100 is the Z direction repeated stretching and contraction vibration, and the machine tool machining cutting is also along the Z direction to make reciprocating spade cutting, and the energy of ultrasonic vibration and the sharpness of the tool are used to ensure the surface quality of the machining wave-absorbing honeycomb.

[0054] As shown in Figures 8a to 8c is a structural schematic diagram of a novel ultrasonic straight blade tool disclosed in the second embodiment of the utility model, asFigures 9a to 9c is the structural schematic diagram of the novel ultrasonic straight blade knife disclosed by the third embodiment of the present application. The related parameters of the rectangular blade in the two novel ultrasonic straight blade knives meet all the parameter size limitation requirements in the first embodiment. And under the condition of meeting the size limitation requirements of the rectangular blade, the front end of the tool seat 10 in the second embodiment is provided with a rounded structure 16 on the two opposite surfaces in the thickness direction, that is, the transition area between the tool seat 10 and the rectangular blade 20 is modified into a large circular arc angle, so as to reduce the phenomenon that the stress of the rectangular blade 20 is too concentrated at the root position when the ultrasonic vibration is generated, disperse the stress generation area, and ensure the stability and service life of the tool. The tool seat 10 is provided with a positioning guide shaft for positioning, so as to ensure the excellent conductivity of the ultrasonic. The material of the tool seat 10 is high-strength alloy steel, and the heat treatment hardness requirement is greater than or equal to 30HRC, so as to ensure that the ultrasonic vibration does not affect the structural performance of the tool seat 10. The rectangular blade 20 in the third embodiment is of a widened structure, and the width M of the rectangular blade 20 after being widened is equal to 1.38D. The stress concentration position is dispersed and transferred from the welding position between the tool seat 10 and the rectangular blade 20 to the two side taper angle fixing sections, and the thickness of the two sides of the taper angle is thickened and widened to avoid the instability caused by stress concentration.

[0055] In summary, the novel ultrasonic straight blade knife disclosed by the present application provides a straight blade tool with a rectangular appearance, and the three sides of the rectangular outer edge are provided with blades. The straight blade tool can be used for shovel cutting process of the wave-absorbing honeycomb under normal cutting processing, and the rectangular notch style in the wave-absorbing honeycomb can also be well processed. At the same time, the taper angle has good advantages for the transmission of ultrasonic performance, and the phenomenon of ultrasonic vibration stress concentration is avoided, so as to ensure the stability of the tool and improve the processing quality of the surface of the wave-absorbing honeycomb.

[0056] The background part of the present application can contain background information about the problem or environment of the present application, rather than the prior art described by others. Therefore, the content contained in the background art part is not the admission of the prior art by the applicant.

[0057] The above is further detailed description of the utility model in combination with specific / preferred embodiments, and cannot be deemed as limitation of the specific implementation of the utility model to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, it can make several substitutions or variations to the described embodiments, and these substitution or variation manners should be deemed as belonging to the protection scope of the utility model. In the description of the specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples and the features of different embodiments or examples described in the specification without mutual contradiction. Although the embodiments of the utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made in this paper without departing from the scope defined by the appended claims.

Claims

1. A novel ultrasonic straight blade knife characterized by, The rectangular blade is axially symmetric along the axis of the length direction from the rear end to the front end.

2. The novel ultrasonic straight blade knife according to claim 1, characterized in that, The angle between the side blade faces on the two opposite sides of the rectangular blade in the thickness direction is 27-35°.

3. The novel ultrasonic straight blade knife according to claim 1, wherein, The thickness of the rectangular blade gradually decreases in the direction from the rear end to the front end.

4. The novel ultrasonic straight blade knife according to claim 1, wherein, The thickness at the root of the blade tip blade face on the rectangular blade is 1 / 3-2 / 3 of the thickness at the rear end of the rectangular blade.

5. The novel ultrasonic straight blade knife according to claim 1, wherein, The angle between the main body faces on the two opposite sides of the rectangular blade in the thickness direction is 0.5-2.5°.

6. The novel ultrasonic straight blade knife according to claim 1, wherein, The length of the side blade on the two sides of the rectangular blade is 25-35 mm.

7. The novel ultrasonic straight blade knife according to claim 1, wherein, The rectangular blade is axially symmetric along the axis of the length direction from the rear end to the front end.

8. The novel ultrasonic straight blade knife according to claim 1, wherein, The rear end of the rectangular blade is welded to the blade seat by soldering.

9. The novel ultrasonic straight blade knife according to claim 1, wherein, The width of the rectangular blade is 0.9-1.5 times the width of the blade seat.

10. The novel ultrasonic straight blade knife according to claim 1, wherein, The two opposite sides of the front end of the blade seat are provided with a rounded structure in the thickness direction.

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