Tool chip breaking structure and cutting tool having the same

Abstract

The present invention belongs to the field of cutting technology, and specifically relates to a tool chip breaking structure and a cutting tool having the same, which is arranged on a corresponding cutting component, the cutting component having a front cutting face, a rear cutting face and a cutting edge located at the intersection of the two, the tool chip breaking structure includes a first chip breaking face, the first chip breaking face has a first side edge intersecting with the front cutting face, and the first chip breaking face is bent in a direction away from the plane where the front cutting face is located, each point on the curved trajectory line of the first chip breaking face is located on the same side of the plane where the front cutting face is located, and the center of the curved trajectory is located outside the cutting component. When chip breaking is performed, the cutting edge causes basic deformation of the chip, and then the chip reaches the first cutting face via the front cutting face, and undergoes secondary deformation along the curved trajectory of the first cutting face to achieve further hardening and embrittlement until the tool breaks the chip, which can achieve from semi-finishing to finishing to meet different cutting depths and feeds.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting, and in particular relates to a tool chip breaking structure and a cutting tool having the same. Background Art

[0002] During the cutting process, flying chips will reduce the safety of the working environment, and long chips will be entangled on the workpiece or the tool head, which may easily scratch the workpiece and damage the tool. For automated processing machine tools, the work of each tool is closely linked. If the chip breaking of a tool is unreliable, it will affect the entire processing process. It can be seen that the reliability of chip breaking must be considered when designing the tool.

[0003] When designing a tool, the width of the chip groove should also be appropriate to the cutting depth. Otherwise, when the groove is too narrow, the chips appear wide and are not easy to curl in the groove. Often, the chips do not flow through the bottom of the groove and form ribbon-shaped chips. When the groove is too wide, the chips appear narrow, flow more freely, and are not fully deformed or broken.

[0004] In the prior art, the patent document with application number 2011100880968 provides a machine-clamped blade for machining the outer diameter of various shafts, wherein one acute angle of the blade is set as an arc structure, and a cutting portion is welded on the upper end surface, and the upper end surface of the cutting portion is provided with a chip breaker groove along the edge shape of one corner of the blade, and the distance between the chip breaker groove and the edge of the blade is 0.05-0.2mm. When the blade provided by the technical solution is in use, when the radius of the arc structure is greater than 0.2mm, the groove width W naturally formed at the tip of the blade is relatively reasonable, and chip breaking can be achieved, as shown in the attached Figure 1 As shown in; when the radius of the arc structure is ≤0.2mm, the width W of the groove naturally formed at the tip of the tool is too large to achieve chip breaking. It can be seen that the structure in which the chip breaker groove extends along the edge shape of one corner of the blade has technical defects.

[0005] On the other hand, the patent with application number 2019100161044 provides an indexable cutting blade with a chip breaking structure, including a groove structure (i.e., a chip breaking groove) formed by an arc surface and an inclined surface. Although the arc surface can guide the chips to bend and deform, since the groove structure does not extend along the edge direction of the cutting edge, when the curvature of the cutting edge is too large or the cutting edge is a composite structure composed of a straight line and an arc, the continuously generated chips are prone to cross the groove and cannot be broken.

[0006] In view of the problems existing in the above-mentioned prior art, it is necessary to develop a new chip breaking structure suitable for use. Summary of the invention

[0007] The invention provides a tool chip breaking structure and a cutting tool having the same, so as to solve the problem of chip breaking failure existing in the cutting structure.

[0008] A tool chip breaking structure of the present invention adopts the following technical solution:

[0009] A tool chip breaking structure is arranged on a corresponding cutting component, the cutting component has a front cutting face, a rear cutting face and a cutting edge located at the intersection of the front cutting face and the rear cutting face, the tool chip breaking structure includes a first chip breaking face, the first chip breaking face has a first side edge intersecting with the front cutting face, and the first chip breaking face is curved in a direction away from the plane where the front cutting face is located, each point on the curved trajectory line of the first chip breaking face is located on the same side of the plane where the front cutting face is located, and the center of the curved trajectory is located outside the cutting component.

[0010] As an improvement, the second side edge of the first chip breaking surface is opposite to the first side edge, and the tool chip breaking structure further has a second chip breaking surface cantilevered from the second side edge.

[0011] As an improvement, the second chip breaking surface is perpendicular to the rake face.

[0012] As an improvement, the curved trajectory of the first chip breaking surface is tangent to the plane where the rake face is located.

[0013] As an improvement, the curved trajectory of the first chip breaking surface is tangent to the plane where the second chip breaking surface is located.

[0014] As an improvement, the curved trajectory of the first chip breaking surface is an arc less than or equal to 90°.

[0015] As an improvement, the curved trajectory of the first chip breaking surface is an arc with a radius of 0.01-0.5 mm.

[0016] A cutting tool of the present invention adopts the following technical solution:

[0017] A cutting tool, the cutting tool has at least one cutting component, the cutting component has a front cutting face, a back cutting face and a cutting edge located at the intersection of the front cutting face and the back cutting face, the cutting component also has a tool chip breaking structure, the tool chip breaking structure includes a first chip breaking surface, the first chip breaking surface has a first side edge intersecting with the front cutting face, and the first chip breaking surface is curved in a direction away from the plane where the front cutting face is located, each point on the curved trajectory line of the first chip breaking surface is located on the same side of the plane where the front cutting face is located, and the center of the curved trajectory is located outside the cutting component.

[0018] As an improvement, the second side edge of the first chip breaking surface is opposite to the first side edge, and the tool chip breaking structure further has a second chip breaking surface cantilevered from the second side edge.

[0019] As an improvement, the second chip breaking surface is perpendicular to the rake face.

[0020] As an improvement, the curved trajectory of the first chip breaking surface is tangent to the plane where the rake face is located.

[0021] As an improvement, the curved trajectory of the first chip breaking surface is tangent to the plane where the second chip breaking surface is located.

[0022] As an improvement, the curved trajectory of the first chip breaking surface is an arc less than or equal to 90°.

[0023] As an improvement, the curved trajectory of the first chip breaking surface is an arc with a radius of 0.01-0.5 mm.

[0024] As an improvement, the cutting edge has an arc-shaped first cutting edge, and the arc radius of the first cutting edge is 0.01-0.5 mm.

[0025] As an improvement, the distance between the first cutting edge and the plane where the second chip breaking surface is located is 0.8-1.0 mm.

[0026] The beneficial effects of the present invention are:

[0027] A tool chip breaking structure provided by the present invention is arranged on a corresponding cutting component, the cutting component having a front cutting face, a rear cutting face and a cutting edge located at the intersection of the front cutting face and the rear cutting face, the tool chip breaking structure includes a first chip breaking face, the first chip breaking face has a first side edge intersecting with the front cutting face, and the first chip breaking face is curved in a direction away from the plane where the front cutting face is located, each point on the curved trajectory line of the first chip breaking face is located on the same side of the plane where the front cutting face is located, and the center of the curved trajectory is located outside the cutting component, when chip breaking is performed, the cutting edge causes basic deformation of the chip, and then the chip reaches the first cutting face via the front cutting face, and undergoes secondary deformation along the curved trajectory of the first cutting face to achieve further hardening and embrittlement until the tool breaks the chip, which can achieve from semi-finishing to finishing to meet different cutting depths and feeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a structural schematic diagram of a specific embodiment of the cutting tool of the present invention;

[0030] Figure 2 for Figure 1 A local schematic diagram in FIG.

[0031] Figure 3A front view of a specific embodiment of a cutting tool of the present invention;

[0032] Figure 4 It is a left side view of a specific embodiment of the cutting tool of the present invention;

[0033] Figure 5 for Figure 4 A local enlarged schematic diagram of point B in FIG.

[0034] Figure 6 A top view of a specific embodiment of a cutting tool of the present invention;

[0035] Reference numerals:

[0036] 1: cutting tool; 2: cutting part; 21: rake face; 22: flank face; 3: first chip-breaking face; 31: first side edge; 32: second side edge; 4: second chip-breaking face; 5: first cutting edge; 6: second cutting edge; 7: third cutting edge. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] An embodiment of a tool chip breaking structure of the present invention is as follows Figures 1 to 6As shown, a tool chip breaking structure is arranged on a corresponding cutting component 2, and the cutting component 2 has a front cutting face 21, a back cutting face 22 and a cutting edge located at the intersection of the two. The tool chip breaking structure includes a first chip breaking face 3, and the first chip breaking face 3 has a first side edge 31 intersecting with the front cutting face 21, and the first chip breaking face 3 is bent in a direction away from the plane where the front cutting face 21 is located, and each point on the curved trajectory line of the first chip breaking face 3 is located on the same side of the plane where the front cutting face 21 is located, and the center of the curved trajectory is located outside the cutting component 2.

[0041] When breaking chips, the cutting edge causes basic deformation of the chips, and then the chips reach the first cutting surface through the front cutting face 21, and undergo secondary deformation along the curved trajectory of the first cutting surface to achieve further hardening and embrittlement until the tool breaks the chips, which can achieve from semi-finishing to finishing and meet different cutting depths and feeds.

[0042] In this embodiment, the width W of the chip breaking structure is 0.8-1.0 mm. In this embodiment, W is 1.0 mm.

[0043] Opposite to the first side edge 31 is the second side edge 32 of the first chip breaking surface 3. The tool chip breaking structure also has a second chip breaking surface 4 cantilevered from the second side edge 32. The height D1 of the second chip breaking surface 4 is 0.05-0.2 mm. In this embodiment, D1 is 0.1 mm. The second chip breaking surface 4 can assist the first chip breaking surface 3 in chip breaking. In this embodiment, the second chip breaking surface 4 is perpendicular to the rake face 21. When the chips reach the second chip breaking surface 4, the chips can be broken better, especially when processing plastic materials, the breaking effect is better.

[0044] The curved trajectory of the first chip breaking surface 3 is an arc, and the angle of the arc is less than or equal to 90°. In this embodiment, the curved trajectory of the first chip breaking surface 3 is an arc of 90°. Specifically, the curved trajectory of the first chip breaking surface 3 is tangent to the plane where the rake face 21 is located. The curved trajectory of the first chip breaking surface 3 is tangent to the plane where the second chip breaking surface 4 is located, and the second chip breaking surface 4 is perpendicular to the rake face 21.

[0045] In this embodiment, the extension trajectory of the first chip breaking surface 3 is a straight line, and in other embodiments, it may be a wavy line or an arc line.

[0046] The curved trajectory of the first chip breaking surface 3 is an arc, and its radius R1 is 0.01-0.5 mm. In this embodiment, R1 is 0.2 mm.

[0047] An embodiment of a cutting tool of the present invention. Figures 1 to 6A cutting tool 1, the cutting tool 1 has at least one cutting component 2, the cutting component 2 has a front cutting face 21, a back cutting face 22 and a cutting edge located at the intersection of the front cutting face 21, the cutting component 2 also has a tool chip breaking structure, the tool chip breaking structure includes a first chip breaking surface 3, the first chip breaking surface 3 has a first side edge 31 intersecting with the front cutting face 21, and the first chip breaking surface 3 is bent in a direction away from the plane where the front cutting face 21 is located, each point on the curved trajectory line of the first chip breaking surface 3 is located on the same side of the plane where the front cutting face 21 is located, and the center of the curved trajectory is located outside the cutting component 2.

[0048] Please participate Figure 5 In this embodiment, the width W of the chip breaking structure is 0.8-1.0 mm. In this embodiment, W is 1.0 mm.

[0049] See also Figure 2 , opposite to the first side edge 31 is the second side edge 32 of the first chip breaking surface 3, and the tool chip breaking structure also has a second chip breaking surface 4 cantilevered from the second side edge 32, and the height D1 of the second chip breaking surface 4 is 0.05-0.2mm, and in this embodiment D1 is 0.1mm.

[0050] Please refer again Figure 5 The curved trajectory of the first chip-breaking surface 3 is an arc, and the angle of the arc is less than or equal to 90°. In this embodiment, the curved trajectory of the first chip-breaking surface 3 is an arc of 90°. Specifically, the curved trajectory of the first chip-breaking surface 3 is tangent to the plane where the rake face 21 is located. The curved trajectory of the first chip-breaking surface 3 is tangent to the plane where the second chip-breaking surface 4 is located, and the second chip-breaking surface 4 is perpendicular to the rake face 21.

[0051] See also Figure 1 , Figure 2 The curved trajectory of the first chip breaking surface 3 is an arc, and its radius R1 is 0.1-0.3 mm. In this embodiment, R1 is 0.2 mm.

[0052] Please refer again Figure 2 The cutting edge has an arc-shaped first cutting edge 5, the arc radius R2 of the first cutting edge 5 is 0.05-0.4mm, in this embodiment R2 is 0.2mm, and the curvature of the first cutting edge 5 is 90°-145°, in this embodiment it is 120°. The connecting line at both ends of the first cutting edge 5 (i.e. the chord of the arc of the first chipping edge) is parallel to the first side 31, and the spacing D2 between the two is 0.45mm-1.0mm, in this embodiment it is 0.6mm. The cutting edge in this embodiment also has a second cutting edge 6 and a third cutting edge 7 symmetrically arranged at both ends of the first cutting edge 5, the second cutting edge 6 and the third cutting edge 7 are both linear cutting edges, and the straight lines of the second cutting edge 6 and the third cutting edge 7 coincide with the connecting line between the end points of the first cutting edge 5 and the end points of the first side 31.

[0053] The distance between the first cutting edge 5 and the plane where the second chip breaking surface 4 is located (ie the width W of the chip breaking structure) is 0.8-1.0 mm.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tool chip breaking structure, arranged on a corresponding cutting component, the cutting component having a rake face, a flank face and a cutting edge located at the intersection of the rake face and the flank face, characterized in that: The tool chip breaking structure comprises a first chip breaking surface, the first chip breaking surface has a first side edge intersecting with the rake face, and the first chip breaking surface is curved in a direction away from the plane where the rake face is located, each point on the curved trajectory line of the first chip breaking surface is located on the same side of the plane where the rake face is located, and the center of the curved trajectory is located outside the cutting component; Opposite to the first side edge is a second side edge of the first chip breaking surface, and the tool chip breaking structure further comprises a second chip breaking surface overhanging from the second side edge; The second chip-breaking surface is perpendicular to the rake face, and the curved trajectory of the first chip-breaking surface is tangent to the plane where the rake face is located; The width of the tool chip breaking structure is 0.8-1.0 mm.

2. A tool chip breaking structure according to claim 1, characterized in that: The curved trajectory of the first chip breaking surface is tangent to the plane where the second chip breaking surface is located.

3. A tool chip breaking structure according to claim 1 or 2, characterized in that: The curved trajectory of the first chip breaking surface is an arc less than or equal to 90°.

4. A tool chip breaking structure according to claim 1 or 2, characterized in that: The curved trajectory of the first chip breaking surface is an arc with a radius of 0.01-0.5 mm.

5. A cutting tool, the cutting tool having at least one cutting component, the cutting component having a rake face, a flank face and a cutting edge located at the intersection of the rake face and the flank face, characterized in that: The cutting component also has a tool chip breaking structure, and the tool chip breaking structure is a tool chip breaking structure as described in any one of claims 1 to 4.

6. A cutting tool according to claim 5, characterized in that: The cutting edge has an arc-shaped first cutting edge, and the arc radius of the first cutting edge is 0.01-0.5 mm.

7. A cutting tool according to claim 5, characterized in that: The distance between the first cutting edge and the plane where the second chip breaking surface is located is 0.8-1.0 mm.

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