Cutting knife, machining equipment and machine tool

Abstract

The invention relates to the technical field of cutting knives, and discloses a cutting knife, machining equipment and a machine tool, the cutting knife is characterized in that a blade body is in a cross section perpendicular to an axis, two front knife faces and two rear knife faces form a centrosymmetric quadrangle, adjacent front knife faces and rear knife faces form cutting blades, and the cutting blades are in the quadrangle and on the same side of the axis; an included angle alpha is formed between the rear tool face and the machining reference face of the rear tool face, the included angle alpha is larger than or equal to 0.5 degree and smaller than or equal to 20 degrees, and the blade body is provided with two machining reference faces which are symmetrically located on the two sides of the axis of the blade body and parallel to the axis. By means of the structure, the cutter does not need to machine a roll angle in the machining process, the one-way cutting edge is tightly attached to the machining cambered surface, and therefore residues on the machined surface are reduced, the machining quality is improved, and high-precision machining is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting knives, and in particular to a cutting knife, processing equipment and a machine tool. Background Art

[0002] At present, for the processing of honeycomb materials, the existing technology usually uses a double-edge cutting knife for processing. The double-edge cutting knife needs to apply a tilt angle during processing. There will be a certain gap between the double-edge cutting knife and the surface to be processed. There will be residues on the processed surface after processing, and it cannot be processed in one time. There will also be processing quality problems. Summary of the invention

[0003] The purpose of the present invention is to provide a cutting knife, processing equipment and machine tool, which can reduce the residue on the processed surface and improve the processing quality.

[0004] In order to achieve the above object, the present invention provides a cutting knife, comprising:

[0005] A knife handle and a blade body connected axially in sequence from the rear to the front, the blade body having two cutting edges, two oppositely disposed rake faces and two oppositely disposed flank faces, the adjacent rake faces and flank faces forming the cutting edge, the two rake faces and the two flank faces forming a centrally symmetrical quadrilateral in a cross section of the blade body perpendicular to the axis, and an angle between the rake faces and the flank faces forming the cutting edge is an acute angle;

[0006] Within the quadrilateral and on the same side of the axis, the back cutting surface has an angle α relative to the machining reference surface of the back cutting surface, satisfying: 0.5°≤α≤20°, and the blade body has two machining reference surfaces, which are symmetrically located on both sides of the axis of the blade body and are both parallel to the axis.

[0007] In some embodiments of the present invention:

[0008] The outer peripheral surface of the tool handle has tool retraction recesses symmetrically arranged on both sides of the axis, and the tool retraction recess has a tool retraction starting line on the side facing the blade body. The tool retraction starting line is parallel to the processing reference surface, and the tool retraction starting line is located on the end surface of the tool handle facing the blade body.

[0009] In some embodiments of the present invention:

[0010] The tool retraction recess is in an arc shape, and the included angle between the front tool face and the back tool face forming the cutting edge is γ, which satisfies: 15°≤γ≤45°.

[0011] In some embodiments of the present invention:

[0012] The knife handle includes a clamping section and a fastening section, the clamping section is cylindrical, the outer circumferential surface of the clamping section is provided with a flat portion, one end of the clamping section is connected to the blade body, and the other end of the clamping section is connected to the fastening section, and the connection between the clamping section and the fastening section is an arc transition.

[0013] In some embodiments of the present invention:

[0014] The end surface of the clamping section connected to the fastening section is a positioning surface, and the positioning surface is used to position the cutting knife at a preset clamping position in the processing equipment.

[0015] In some embodiments of the present invention:

[0016] The length of the blade along its central axis ranges from 10 mm to 135 mm, the thickness of the blade ranges from 0.5 mm to 5 mm, and the material of the blade includes carbon tool steel, alloy tool steel, high-speed steel or cemented carbide.

[0017] In some embodiments of the present invention:

[0018] The blade has a tip portion at one end of the blade body facing away from the handle;

[0019] In the first projection plane perpendicular to the processing reference plane, the tip angle of the tool tip is β, satisfying: 45°≤β≤90°; in the second projection plane parallel to the processing reference plane, the angle between the two outermost contour lines of the tool tip is the tool tip secondary angle, the tool tip secondary angle is 80~100°, and the angle between the two outermost contour lines of the blade body is 5°~20°.

[0020] In some embodiments of the present invention:

[0021] The length of the blade tip along the central axis of the blade body is L mm, and the thickness of the blade body is t mm, satisfying the following: 80%*t≤L≤90%*t.

[0022] The present invention also provides a processing device, comprising the cutting knife as described above.

[0023] The present invention also provides a machine tool, comprising the processing equipment as described above.

[0024] The present invention provides a cutting knife, a processing device and a machine tool, which have the following beneficial effects compared with the prior art:

[0025] The cutting knife of the present invention comprises a shank and a blade body. In the cross section of the blade body perpendicular to the axis, two front blade faces and two rear blade faces form a centrally symmetrical quadrilateral. Adjacent front blade faces and rear blade faces form a cutting edge. In the quadrilateral and on the same side of the axis, the rear blade face has an angle α with respect to the machining reference surface of the rear blade face, which satisfies: 0.5°≤α≤20°. The blade body has two machining reference surfaces, which are symmetrically located on both sides of the axis of the blade body and are both parallel to the axis. Through such a structure, in a preset machining path, a one-way blade cutting knife that can only cut in one direction is formed. When cutting in the reverse direction, the reverse cutting is achieved by changing the tool. At the same time, in the process of cutting honeycomb materials, the one-way blade cutting knife does not need to process the side tilt angle during the machining process, so that the one-way cutting blade and the machining arc surface are closely fitted, thereby reducing the residue of the machined surface. During the machining process, the rear blade face will not produce an indentation on the workpiece due to the angle α, thereby improving the machining quality and achieving high-precision machining.

[0026] The processing equipment of the present invention includes the above-mentioned cutting knife, which can make the cutting knife fit closely with the processed arc surface without processing the side tilt angle during the processing, thereby reducing the residue of the processed surface, improving the processing quality, and realizing high-precision processing.

[0027] The machine tool of the present invention, including the above-mentioned processing equipment, can make the cutting blade fit closely with the processed arc surface without processing the inclination angle during the processing, thereby reducing the residue of the processed surface, improving the processing quality, and realizing high-precision processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a cutting knife according to an embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the cutting blade body removing the excess of the cutting blade according to the embodiment of the present invention.

[0030] Figure 3 It is a schematic diagram showing an angle between the back cutting surface and the processing reference surface in a cross section perpendicular to the axis of the blade body of the cutting knife according to an embodiment of the present invention.

[0031] Figure 4 yes Figure 1 A magnified schematic diagram of center A.

[0032] Figure 5 yes Figure 1 Enlarged schematic diagram of point C in the middle.

[0033] Figure 6a It is a front view of a cutting knife according to an embodiment of the present invention.

[0034] Figure 6b yes Figure 6a Enlarged view of the middle blade tip.

[0035] Figure 7 It is a cross-sectional view taken along line BB in FIG. 6 .

[0036] Figure 8 1 is a side view of a cutting knife according to an embodiment of the present invention.

[0037] Fig. 9 Schematic diagram of the cutting knife according to the embodiment of the present invention from another angle.

[0038] Fig.10 is with Figure 1 Cutting knife with mirror-image blade structure.

[0039] Fig.11 It is a force analysis diagram of a bidirectional cutting blade in the prior art.

[0040] Fig.12 θ is the tool cutting angle, and a schematic diagram showing the relationship between the cutting angle θ and the tool blade angle β and tool tip angle δ.

[0041] Fig.13 It is a schematic diagram of the effective interaction area S of the blade surface and the workpiece 300 being cut during the cutting process.

[0042] Fig.14 It is a force analysis diagram of the cutting knife according to the embodiment of the present invention.

[0043] Fig.15 It is a schematic diagram of the cutting process of the cutting knife according to an embodiment of the present invention.

[0044] In the figure, 100, a one-way blade cutting knife; 200, a two-way blade cutting knife; 300, a workpiece to be cut; 400, a feeding direction;

[0045] 1. Tool handle; 2. Blade body; 11. Clamping section; 12. Fastening section; 111. Tool retraction recess; 112. Connecting surface; 113. Reference line; 114. Flat position; 115. Positioning surface; 21. Front tool face; 22. Back tool face; 221. Processing reference surface; 23. Tool tip. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0050] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Please refer to Figure 1 and Figure 3 A cutting knife 100 according to an embodiment of the present invention comprises: a shank 1 and a blade body 2, wherein the shank 1 and the blade body 2 are connected axially in sequence from the back to the front. In the cutting knife, there are two cutting edges, two oppositely arranged front blade faces 21 and two oppositely arranged back blade faces 22, and the adjacent front blade faces 21 and back blade faces 22 form the cutting edge. In the cross section of the blade body 2 perpendicular to the axis, the two front blade faces 21 and the two back blade faces 22 form a centrally symmetrical quadrilateral, which can simplify the structure of the blade body 2, improve the processing stability and efficiency, and optimize the manufacturing and use process. The angle α between the front blade face 21 and the back blade face 22 forming the cutting edge is an acute angle. The aforementioned structure enables the cutting knife of the present application to form a one-way blade cutting knife, which can only cut in one direction during the cutting process. If reverse cutting is required, the knife needs to be changed, and the cutting edges of the two cutting knives before and after the knife change are mirror-imaged.

[0052] In the quadrilateral and on the same side of the axis, the back face 22 has an angle α with respect to the machining reference surface 221 of the back face 22, satisfying: 0.5°≤α≤20°, and the blade body 2 has two machining reference surfaces 221, and the two machining reference surfaces 221 are symmetrically located on both sides of the axis of the blade body 2 and are parallel to the axis. During the cutting process, the setting of the angle α makes it unnecessary for the one-way blade cutter to machine the side tilt angle during the machining process, so that the one-way blade cutter fits closely with the machining arc surface, thereby reducing the residue on the machined surface. During the machining process, not only can a large amount of material be removed efficiently, but the back face will not produce indentations on the workpiece due to the angle α, and the shape of the material can also be finely trimmed in the finishing process, especially when machining complex shapes such as sharp corners that are difficult to achieve with traditional methods. The one-way blade cutter tool exhibits superior performance, ensures good quality of the machined surface, improves machining quality, and achieves high-precision machining.

[0053] In one embodiment provided in the present application, the cutting knife is connected to an ultrasonic processing device, and the blade 2 vibrates due to the ultrasonic frequency to cut the honeycomb material, wherein the honeycomb material includes metal honeycomb material, plastic honeycomb material, paper honeycomb material, gypsum honeycomb material, etc.

[0054] In this embodiment, reference Figure 3 The cutting edge of the blade body 2 is set to a triangular shape similar to a foot, so only one-way processing can be performed. In a specific implementation, a mirror image blade body 2 structure can be set, such as Figure 1 and Fig.10 A cutting knife having a mirror image blade 2 that cuts in opposite directions, and Figure 1 and Fig.10 There are two one-way cutting knives to choose according to different processing needs. Please refer to the figure Figure 1 and 10 .

[0055] By limiting the angle range of α, the one-way blade cutting knife 100 does not need to process the side tilt angle during the processing, so that the one-way cutting blade fits closely with the processed arc surface, thereby reducing the residue on the processed surface, improving the processing quality, and achieving high-precision processing. At the same time, it can also improve the structural strength of the one-way blade cutting knife 100 and effectively enhance the amplitude and frequency load bearing capacity of the ultrasonic wave.

[0056] In the prior art, Figures 11 to 13 The tool is usually a double-edged cutting tool 200, and the cross-sectional shape of the cutting edge is similar to an isosceles triangle structure. A tilt angle needs to be applied during the processing, resulting in a certain gap between the double-edged cutting tool 200 and the surface to be processed when processing the aramid paper honeycomb curved surface, and there is residue on the processed surface that cannot be processed in one go.

[0057] During the cutting process, please refer to Fig.11 , feed force Ff is the resistance F generated by the workpiece 300 being cut L and the friction resistance F between the tool and the workpiece 300 being cut U The resultant force of 400 components in the feed direction:

[0058]

[0059] (1) In the formula, please refer to Fig.12 Schematic diagram of a double-edged cutting knife 200 with only one blade on one side, θ is the cutting angle of the tool, and the relationship between the cutting angle θ and the blade angle β and the blade tip angle δ. θ is the cutting angle, that is, the angle between the plane of the cut material and the tool at the blade. The plane where the blade angle β is located is perpendicular to the two blade surfaces, and the angle between the two blade surfaces in the plane is the blade angle β:

[0060]

[0061] Assuming that the equivalent deformation resistance of the workpiece 300 is σ, when the workpiece 300 undergoes plastic deformation, the deformation resistance F of the tool is L for:

[0062]

[0063] (3) In the formula, please refer to Fig.13 , S is the effective interaction area between the blade surface and the workpiece 300 being cut during the cutting process.

[0064] When the cutting depth of the tool is a p When , we have:

[0065]

[0066] (4) Where H is the thickness of the tool edge. From equations (3) and (4), we can get the deformation resistance F of the tool during cutting: L :

[0067]

[0068] During the cutting process, the frictional resistance F generated between the tool and the workpiece 300 is U for:

[0069]

[0070] (6) where μ is the friction coefficient between the tool and the workpiece 300 being cut during the cutting process.

[0071] Therefore, the tool feed force F can be obtained from equations (1) and (5) (6): f The functional relationship between the tool tip angle δ, tool edge thickness H, blade angle β, and cutting angle θ is:

[0072]

[0073] Regarding the influence of blade angle β on feed force: when blade angle β increases, cutting angle θ also increases accordingly. From formula (5), we can know that deformation resistance F L increases with the increase of β, and As θ increases (μ is much smaller than 1), the feed force F f It increases with the increase of blade angle β.

[0074] Regarding the effect of tool thickness H on feed force: When tool thickness H increases, it can be seen from formula (3) that the effective contact area S between the tool and the workpiece 300 to be cut also increases, so the deformation resistance F L Therefore, when the tool thickness H increases, the cutting feed force F f It also increases accordingly.

[0075] In addition, when determining the tool face angle and tool thickness parameters, the overall strength of the tool must be considered at the same time. The values ​​of the face angle β and the tool thickness H should not be too small. Therefore, in order to take into account both the tool strength and the smaller cutting feed force during cutting, it is necessary to select a suitable face angle and tool thickness.

[0076] Since the cutting edge of the conventional bidirectional cutting blade 200 has a cross-section similar to an isosceles triangle structure, the cutting edges on both sides have a certain angle with the axis of the cutting blade. Fig.11 , the friction force F generated during cutting U From the decomposition of U It can be decomposed into the force F along the tool axis (on the same straight line as the feed direction 400) U1 and the force F in the radial direction of the tool U2 . Axial force F U1 The cutting resistance will increase during the cutting process, that is, the cutting feed force needs to be increased, and the radial force F U2 The tool will generate a certain torque in the radial direction, affecting the strength of the tool during the cutting process. Therefore, the tool needs to apply a tilt angle, but after the tilt angle is increased, there will be a certain gap between the tool and the surface to be processed when processing the aramid paper honeycomb curved surface, and there will be residue on the processed surface that cannot be processed in one go. For example, if the tilt angle is not applied, the tool will directly squeeze the material when cutting the curved surface, causing indentations in the retained material. Based on this, it is difficult to process complex shapes such as sharp corners and curved surfaces in the prior art, and it is also easy to cause problems such as collapse, tearing, and fiber pulling of aramid paper honeycomb materials.

[0077] The one-way blade cutting knife 100 of this embodiment, please refer to Fig.14 and Fig.15, the cutting edge is a right-angled triangle structure, and the back face 22 of the tool has a certain inclination angle α. When the inclination angle is small, because the cutting angle is almost parallel to the cutting surface of the tool, there is no need to increase the side inclination angle during the cutting process, so that the tool can fit closely with the arc surface to be processed, thereby reducing the residue on the processed surface, and can process complex shapes such as sharp corners and arc surfaces, and can achieve high-precision processing of the arc surface of the workpiece. In addition, when a certain inclination angle α is applied to the back face 22, its effective contact area with the workpiece during cutting will be reduced, and the friction force F generated will be U will also decrease, and F U The force resolution in the radial direction F U2 It will also transform the extrusion of the workpiece into a supporting force for the cutting tool, which will help reduce the extrusion deformation of the cutting tool on the processed surface, reduce the collapse, tearing, fiber pulling and other problems of the nylon paper honeycomb material, and thus improve the processing quality of the workpiece.

[0078] Please refer to Figure 1 , Figure 2 and Figure 4 At least a part of the tool handle 1 is cylindrical, and the outer peripheral surface of the tool handle 1 has tool retraction recesses 111 symmetrically arranged on both sides of the axis. The side of the tool retraction recess 111 facing the blade body has a tool retraction starting line, which is parallel to the processing reference surface 221 and is located on the end surface of the tool handle 1 facing the blade body 2.

[0079] Since the tool is a cutting tool with a handle and a blade formed from a cylinder, during the tool processing, the excess needs to be removed first, and the processing excess is removed step by step from the front to the back, and the tool is gradually retracted backward at the connection between the blade 2 and the handle 1, so that the tool for processing the cutting tool gradually moves away from the cylinder. Therefore, the retraction starting line is located at the connection between the handle and the blade, and gradually concave backward to form a retraction concave position, that is, the retraction starting line is located on the end face of the handle 1 facing the blade 2. Then, the shape is formed as follows: Figure 2 The structure with the tool retraction recess 111 shown in the figure, that is, the tool retraction recess 111 is formed at the connection part between the handle and the blade body and the column structure for processing the blade body, and the cross section can be formed as follows: Figure 3 The structure having the machining reference surface 221 is a rectangle, and the contour line opposite to the rake face in the cross section is the short side line of the rectangle and the line opposite to the flank face is the projection line of the machining reference surface 221, or the contour line opposite to the rake face in the cross section is an arc and the line opposite to the flank face is the projection line of the machining reference surface 221. When machining the flank face, if the flank face is machined on the basis of a rectangle, the contour line of the long side of the rectangle is the theoretical surface for machining the flank face, i.e., the machining reference surface in this application.

[0080] It should be noted that the surface where the long side of the rectangle is located after the allowance is removed does not necessarily coincide with the theoretical machining reference surface, but there will be a theoretical and invisible machining reference surface of the back tool surface. Figure 2 The structural diagram in the figure is only used to exemplify the tool retraction recess and the columnar structure used to form the blade body, and no other limitations are imposed.

[0081] In one embodiment of the present application, in combination with the foregoing content and with reference to Figure 1 The end face of one end of the tool handle 1 is recorded as the connecting surface 112, the connecting surface 112 is perpendicular to the central axis of the tool handle 1, the tool retraction recess 111 extends to the connecting surface 112, and the intersection line of the tool retraction recess 111 and the connecting surface 112 is recorded as the reference line 113, which is the aforementioned tool retraction starting line, and the reference line 113 is parallel to the processing reference surface or is located within the processing reference surface.

[0082] The knife handle 1 can be clamped by the unidirectional blade cutting knife 100 and connected to a driving device for driving the knife handle 1 to move, that is, connected to a horn, so as to transmit ultrasound to the blade body 2 .

[0083] Please refer to Figures 3 to 7 The blade body 2 is arranged on the connecting surface 112. The blade body 2 is a centrally symmetrical quadrilateral in the cross section parallel to the connecting surface 112. The blade body 2 has a front cutting face 21 and a rear cutting face 22 forming a cutting edge. In a projection plane perpendicular to the axis of the cutting tool, the reference line 113 and the rear cutting face 22 are arranged opposite to each other in the projection plane and the projections of the two have an angle α, which satisfies: 0.5°≤α≤20°.

[0084] In some embodiments, the shank 1 includes a clamping section 11 and a fastening section 12. The clamping section 11 is cylindrical, and a flat portion 114 is provided on the outer peripheral surface of the clamping section 11. The connecting surface 112 is the end surface of one end of the clamping section 11. One end of the clamping section 11 is connected to the blade body 2, and the other end of the clamping section 11 is connected to the fastening section 12. The connection between the clamping section 11 and the fastening section 12 is an arc transition.

[0085] The flattened portion 114 forms a plane, which facilitates the clamping of the unidirectional blade cutting knife 100. In this embodiment, two flattened portions 114 are provided, and the two flattened portions 114 are arranged in mirror symmetry.

[0086] The fastening section 12 is provided with a thread, and the fastening section 12 is used to be connected with the amplitude transformer.

[0087] In this embodiment, two tool retracting recesses 111 are provided, the two tool retracting recesses 111 are provided in mirror symmetry, and the flattening position 114 is provided correspondingly to the tool retracting recess 111, and the flattening position 114 extends to the end of the tool retracting recess 111 away from the reference line.

[0088] The arc transition at the connection between the clamping section 11 and the front cutting surface 21 of the blade body 2 can provide strength support for the blade body 2.

[0089] Please refer to Figure 7The end surface of the clamping section 11 connected to the fastening section 12 is a positioning surface 115, which is used to position the cutting knife at a preset clamping position in the processing equipment, that is, after the knife is changed, the positioning surface 115 can position the tip 23 on the blade 2 of each cutting knife at the same height in the processing equipment. The positioning surface 115 is perpendicular to the central axis of the handle 1, and the positioning surface 115 can conduct ultrasound. When the knife is installed, the tip 23 of the blade 2 at the end away from the handle 1 can be kept at a preset position.

[0090] The length of the blade 2 along its central axis ranges from 10 mm to 135 mm, and the thickness of the blade 2 ranges from 0.5 mm to 5 mm. When this range is met, the overall strength of the unidirectional blade cutter 100 can be improved, and the ability to withstand the amplitude and frequency load of ultrasonic waves can be effectively enhanced.

[0091] Please refer to Figure 3 , Figure 6a and Figure 6b , the end of the blade 2 facing away from the handle 1 has a blade tip 23; the blade tip angle β of the blade tip 23 in the first projection plane perpendicular to the processing reference surface 221, or the blade tip 23 in the projection of the plane perpendicular to the reference line 113, satisfies: 45°≤β≤90°, in other embodiments, 50°≤β≤65°. In the second projection plane parallel to the processing reference surface, the angle between the two outermost contour lines of the blade tip is the blade tip secondary angle, and the blade tip secondary angle φ is 80°~100°, in other embodiments, the blade tip secondary angle is 90°, and at the same time, the angle ω between the two outermost contour lines of the blade body is 5°~20°, in other embodiments, the angle between the two outermost contour lines of the blade body is 8.5°. When this range is met, the side of the cutting knife on the side where the material is removed is subjected to greater friction, and the side of the cutting knife on the side where the material is retained is subjected to less friction, and the one-way blade cutting knife 100 has a better cutting effect.

[0092] The provision of the blade tip 23 can facilitate the one-way blade cutting knife 100 to cut into the material, enhance the sharpness of the one-way blade cutting knife 100, and improve the adaptability under different working conditions.

[0093] The length of the blade tip 23 along the central axis of the blade body 2 is L mm, and the thickness of the blade body 2 is t mm, which satisfies: 80%*t≤L≤90%*t. When this range is met, the overall strength of the unidirectional blade cutting knife 100 can be improved, and the ability to withstand the amplitude and frequency load of ultrasonic waves can be effectively enhanced.

[0094] The thickness of the blade tip 23 and the other parts of the blade body 2 are the same. In one embodiment of the embodiment provided in the present application, t is 2.7. The length of the blade body 2 along its central axis is 103, and L is 2.38.

[0095] The cutting knife provided in the embodiment of the present application has a constant angle between the front blade 21 and the back blade 22, and the angle between the front blade 21 and the back blade 22 is γ, which satisfies: 15°≤γ≤45°, and the material of the blade body 2 includes carbon tool steel, alloy tool steel, high-speed steel or cemented carbide. In some embodiments, high-speed steel and cemented carbide have excellent toughness and sufficient strength, can reduce tool wear, reduce cutting force, improve the surface quality of the workpiece, and ensure durability and reliability under long-term use. Preferably, 30°≤γ≤35°, and the one-way blade cutting knife 100 has a better cutting effect.

[0096] In the embodiments provided in the present application, in different cutting tasks, corresponding adaptation can be made according to the specific cutting edge length and angle (tools with different edge lengths can be adapted according to material thickness), ensuring the wide applicability and efficient operation of the cutting knife.

[0097] This embodiment also provides a processing device, including the above-mentioned cutting knife 100. The processing device is an ultrasonic processing device. The cutting knife 100 is connected by a variable amplitude rod. During the processing, there is no need to process the inclination angle, so that the unidirectional cutting blade can fit closely with the processed arc surface, thereby reducing the residue on the processed surface, improving the processing quality, and achieving high-precision processing.

[0098] This embodiment also provides a machine tool, including the above-mentioned processing equipment. During the processing, there is no need to process the inclination angle, so that the one-way cutting edge can fit closely with the processed arc surface, thereby reducing the residue on the processed surface, improving the processing quality, and achieving high-precision processing.

[0099] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A cutting knife, characterized in that: include: A knife handle and a blade body connected axially in sequence from the rear to the front, the blade body having two cutting edges, two oppositely disposed rake faces and two oppositely disposed flank faces, the adjacent rake faces and flank faces forming the cutting edge, the two rake faces and the two flank faces forming a centrally symmetrical quadrilateral in a cross section of the blade body perpendicular to the axis, and an angle between the rake faces and the flank faces forming the cutting edge is an acute angle; Within the quadrilateral and on the same side of the axis, the back cutting surface has an angle α relative to the machining reference surface of the back cutting surface, satisfying: 0.5°≤α≤20°, and the blade body has two machining reference surfaces, which are symmetrically located on both sides of the axis of the blade body and are both parallel to the axis.

2. The cutting knife according to claim 1, characterized in that: The outer peripheral surface of the tool handle has tool retraction recesses symmetrically arranged on both sides of the axis, and the tool retraction recess has a tool retraction starting line on the side facing the blade body. The tool retraction starting line is parallel to the processing reference surface, and the tool retraction starting line is located on the end surface of the tool handle facing the blade body.

3. The cutting knife according to claim 2, characterized in that: The tool retraction recess is in an arc shape, and the included angle between the front tool face and the back tool face forming the cutting edge is γ, which satisfies: 15°≤γ≤45°.

4. The cutting knife according to claim 1, characterized in that: The knife handle includes a clamping section and a fastening section, the clamping section is cylindrical, the outer circumferential surface of the clamping section is provided with a flat portion, one end of the clamping section is connected to the blade body, and the other end of the clamping section is connected to the fastening section, and the connection between the clamping section and the fastening section is an arc transition.

5. The cutting knife according to claim 4, characterized in that: The end surface of the clamping section connected to the fastening section is a positioning surface, and the positioning surface is used to position the cutting knife at a preset clamping position in the processing equipment.

6. The cutting knife according to claim 1, characterized in that: The length of the blade along its central axis ranges from 10 mm to 135 mm, the thickness of the blade ranges from 0.5 mm to 5 mm, and the material of the blade includes carbon tool steel, alloy tool steel, high-speed steel or cemented carbide.

7. The cutting knife according to claim 1, characterized in that: The blade has a tip portion at one end of the blade body facing away from the handle; In the first projection plane perpendicular to the processing reference surface, the tip angle of the tool tip is β, satisfying: 45°≤β≤90°; in the second projection plane parallel to the processing reference surface, the angle between the two outermost contour lines of the tool tip is the tool tip secondary angle, the tool tip secondary angle is 80°~100°, and the angle between the two outermost contour lines of the blade body is 5°~20°.

8. The cutting knife according to claim 7, characterized in that: The length of the blade tip along the central axis of the blade body is L mm, and the thickness of the blade body is t mm, satisfying the following: 80%*t≤L≤90%*t.

9. A processing equipment, characterized in that: Comprising a cutting knife as described in any one of claims 1-8.

10. A machine tool, characterized in that: Comprising the processing equipment as claimed in claim 9.

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