Clamped inserts and turning tools
By designing grooves on the indexable inserts to change the chip removal direction and chip flow rate, the problem of chip breakage in the turning of tantalum and niobium materials is solved, thus improving machining quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGXIA ORIENT TANTALUM INDUSTRY CO LTD
- Filing Date
- 2024-02-22
- Publication Date
- 2026-05-26
AI Technical Summary
When turning tantalum and niobium materials, the chips are difficult to break, resulting in chip accumulation between the tool and the workpiece, which affects the surface quality of the workpiece and makes it difficult to achieve finishing.
Design a mechanically clamped insert with a groove along its own edge. The first groove surface serves as the rake face. The main cutting edge is located at the first intersection line, and the secondary cutting edge is located at the second intersection line. Increasing the rake angle changes the chip removal direction and chip flow rate, improves the guiding effect, and reduces chip removal resistance.
It improves the machining quality of tantalum and niobium workpieces, reduces the risk of "C"-shaped chip formation, reduces the risk of workpiece scratches caused by poor chip removal and chip accumulation, and improves machining efficiency and tool life.
Smart Images
Figure CN117840469B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of metalworking cutting tools, and particularly to an indexable insert and a turning tool. Background Technology
[0002] Tantalum and niobium materials exhibit good plasticity, with a typical elongation exceeding 40%, and are resistant to high temperatures. Turning tantalum and niobium generates high temperatures, yet the materials retain good plasticity even at these high temperatures, resulting in ribbon-like chips. During turning, the cutting tool struggles to break these chips, leading to significant chip accumulation between the tool and workpiece. This negatively impacts the workpiece's surface quality, making finishing difficult. Summary of the Invention
[0003] The purpose of this disclosure is to provide an indexable insert and a turning tool to improve the machining quality of tantalum-niobium workpieces.
[0004] The first aspect of this disclosure provides a mechanically clamped cutting tool.
[0005] The mechanically clamped blade is a polyhedron, and the mechanically clamped blade has a first end face, a second end face, and multiple side faces, which are located between the first end face and the second end face that are arranged opposite to each other.
[0006] The first end face has a groove along its own edge. The groove has a first groove surface. Along the edge of the first end face, the first groove surface gradually approaches the second end face from the corner of the polyhedron. The first groove surface is adjacent to the two side faces and forms a first intersection line and a second intersection line with the two side faces respectively.
[0007] The rake face of the indexable insert is located on the first groove surface, the main cutting edge of the indexable insert is located on the first intersection line, and the secondary cutting edge of the indexable insert is located on the second intersection line.
[0008] According to some embodiments of this disclosure, the first groove surface is a plane.
[0009] According to some embodiments of this disclosure, the angle between the first groove surface and the first end face is 25° to 30°.
[0010] According to some embodiments of this disclosure, the groove has a second groove surface adjacent to the first groove surface, the second groove surface is a plane and forms a third intersection line with the first groove surface, the first groove surface is a triangle, and the first intersection line, the second intersection line and the third intersection line are the three sides of the triangle.
[0011] According to some embodiments of this disclosure, the groove is formed by grinding.
[0012] According to some embodiments of this disclosure, the mechanically clamped blade is an indexable blade, and the plurality of grooves are respectively formed on different edges of the first end face.
[0013] According to some embodiments of this disclosure, the indexable insert has a mounting hole in the middle, which is configured to connect with the tool holder of a lathe tool to mount the indexable insert onto the tool holder.
[0014] A second aspect of this disclosure provides a lathe tool, comprising:
[0015] Handle; and
[0016] The clamping blade described in the first aspect of this disclosure is mounted on one end of the tool holder.
[0017] In the indexable insert provided in this disclosure, a groove is formed on the first end face along its edge. At least a portion of the first groove surface can serve as the rake face of the indexable insert, at least a portion of the first intersection line can serve as the main cutting edge, and at least a portion of the second intersection line can serve as the flank face of the indexable insert. Furthermore, along the edge of the first end face, the first groove surface gradually approaches the second end face from the corner of the polyhedron. The aforementioned groove arrangement can increase the rake angle of the tool, change the chip removal direction and chip flow rate, improve the chip guiding effect, reduce chip removal resistance, and reduce the risk of forming "C"-shaped chips during turning, as well as the risk of poor chip removal, chip accumulation, and scratching the workpiece. Therefore, the indexable insert provided in the embodiments of this disclosure can improve the machining quality of tantalum-niobium material workpieces.
[0018] The cutting tool provided in this disclosure has the advantages of the aforementioned indexable inserts.
[0019] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0020] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:
[0021] Figure 1 This is a schematic diagram of the structure of a clamping blade according to some embodiments of the present disclosure.
[0022] Figure 2 for Figure 1 The diagram shows the structure of the mechanically clamped blade along direction A.
[0023] Figure 3 for Figure 2 The diagram shows an enlarged view of the mechanically clamped blade at point B.
[0024] Figures 1 to 3 In the figures, the labels represent:
[0025] 1. Clamped insert; 111. First end face; 112. Second end face; 113. Side face; 114. First groove face; 115. Second groove face; 121. First intersection line; 122. Second intersection line; 123. Third intersection line; 130. Cutting tip; 140. Mounting hole. Detailed Implementation
[0026] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0028] In the description of this disclosure, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.
[0029] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0030] refer to Figures 1 to 3 Some embodiments of this disclosure provide a mechanically clamped cutting insert 1. The mechanically clamped cutting insert 1 is a polyhedron, having a first end face 111, a second end face 112, and multiple side faces 113, which are located between the opposing first end face 111 and second end face 112. The first end face 111 has a groove along its edge, the groove having a first groove surface 114. Along the edge of the first end face 111, the first groove surface 114 gradually approaches the second end face 112 from the corner of the polyhedron. The first groove surface 114 is adjacent to the two side faces 113 and forms a first intersection line 121 and a second intersection line 122 with the two side faces 113, respectively. The rake face of the mechanically clamped cutting insert 1 is located on the first groove surface 114, the main cutting edge of the mechanically clamped cutting insert 1 is located on the first intersection line 121, and the secondary cutting edge of the mechanically clamped cutting insert 1 is located on the second intersection line 122.
[0031] The intersection of the first intersection line 121 and the second intersection line 122 is the blade tip 130. Optionally, refer to... Figure 1 The clamping blade 1 is a hexahedron, having a first end face 111, a second end face 112, and four side faces 113. Optionally, in some embodiments not shown, the clamping blade 1 can also be a pentahedron, having a first end face 111, a second end face 112, and three side faces 113.
[0032] In the indexable insert provided in the embodiments of this disclosure, a groove is formed on the first end face 111 along its edge. At least a portion of the first groove surface 114 can serve as the rake face of the indexable insert 1, at least a portion of the first intersection line 121 can serve as the main cutting edge, and at least a portion of the second intersection line 122 can serve as the flank face of the indexable insert 1. Along the edge of the first end face 11, the first groove surface 114 gradually approaches the second end face 112 from the corner of the polyhedron. The groove can increase the rake angle of the tool, change the chip removal direction and chip flow rate, improve the chip guiding effect, reduce chip removal resistance, reduce the risk of forming "C"-shaped chips during turning, and reduce the risk of poor chip removal and chip accumulation that scratches the workpiece. Therefore, the indexable insert 1 provided in the embodiments of this disclosure can improve the machining quality of tantalum-niobium material workpieces.
[0033] In some embodiments, reference Figures 1 to 3 The first groove surface 114 is a plane.
[0034] In the above embodiments, the planar first groove surface 114 has a good guiding effect on chips, which can reduce chip removal resistance and make it easier to reduce the machining difficulty of the clamped insert 1 itself.
[0035] Of course, in some embodiments not shown, the first groove surface 114 may also be a curved surface or other shaped surface.
[0036] In some embodiments, the angle between the first groove surface 114 and the first end surface 111 is 25° to 30°.
[0037] For example, the angle between the first groove surface 114 and the first end face 111 can be 25°, 26°, 27°, 28°, 29°, or 30°. In the above embodiments, the rake angle is within a better range, which can further improve the chip guiding effect of the first groove surface 114 during turning, thereby further improving the machining quality of tantalum-niobium material workpieces.
[0038] In some embodiments, reference Figure 1 The groove has a second groove surface 115 adjacent to the first groove surface 114. The second groove surface 115 is a plane and forms a third intersection line 123 with the first groove surface 114. The first groove surface 114 is a triangle, and the first intersection line 121, the second intersection line 122 and the third intersection line 123 are the three sides of the triangle.
[0039] Optionally, in order to improve the strength of the clamping blade 1, the intersection line of the side 113 where the first intersection line 121 is located and the first end face 111 is collinear with the first intersection line 121.
[0040] In the above embodiment, along the extension direction of the second intersection line 122, the size of the first groove surface 114 gradually decreases from the corner of the polyhedron, and the second groove surface 115 gradually approaches the side surface 113 where the second intersection line 122 is located. The shape of the groove is roughly a triangular pyramid. During the generation and flow of chips, they can be gradually discharged from the groove under the action of the first groove surface 114 and the second groove surface 115, achieving a better chip removal effect.
[0041] In some embodiments, the grooves are formed by grinding.
[0042] In the above embodiments, the groove can be ground together when processing the machine-clamped insert, or it can be further obtained by sharpening on the finished machine-clamped insert. The sharpening process is simple.
[0043] In some embodiments, the mechanically clamped blade is an indexable blade, and multiple grooves are respectively formed on different edges of the first end face 111.
[0044] In the above embodiments, each groove corresponds to a set of rake faces, main cutting edges, and secondary cutting edges. When the rake face, main cutting edge, and secondary cutting edge corresponding to one of the grooves are worn, the workpiece can be turned by indexing and using the rake face, main cutting edge, and secondary cutting edge corresponding to another groove. Therefore, the auxiliary time required for tool replacement can be reduced, the machining efficiency can be improved, and the life of the indexable insert 1 and the tool holder can be extended, thereby reducing costs.
[0045] In some embodiments, reference Figure 1 The mechanically clamped insert 1 has a mounting hole 140 in the middle, which is configured to connect with the tool holder of the cutting tool to mount the mechanically clamped insert 1 onto the tool holder.
[0046] Optionally, the mounting hole 140 is a round hole. In the above embodiment, the mounting hole 140 can connect the indexable insert 1 to the tool holder of the lathe tool, which facilitates the matching of the indexable insert 1 and the tool holder, and also facilitates the indexable insert 1 to rotate.
[0047] Some embodiments of this disclosure also provide a lathe tool, including a tool holder and a mechanically clamped insert 1 provided in embodiments of this disclosure. The mechanically clamped insert 1 is mounted on one end of the tool holder.
[0048] The cutting tools provided in the embodiments of this disclosure have the advantages of the indexable inserts provided in the embodiments of this disclosure.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.
Claims
1. A mechanically clampable blade, characterized in that, The clamping blade (1) is a polyhedron, and the clamping blade (1) has a first end face (111), a second end face (112) and a plurality of side faces (113), which are located between the first end face (111) and the second end face (112) which are arranged opposite to each other; The first end face (111) has a groove along its own edge. The groove has a first groove surface (114). Along the edge of the first end face (111), the first groove surface (114) gradually approaches the second end face (112) from the corner of the polyhedron. The first groove surface (114) is adjacent to the two side surfaces (113) and forms a first intersection line (121) and a second intersection line (122) with the two side surfaces (113) respectively. The rake face of the indexable insert (1) is located on the first groove surface (114), the main cutting edge of the indexable insert (1) is located on the first intersection line (121), and the secondary cutting edge of the indexable insert (1) is located on the second intersection line (122). Wherein, the first groove surface (114) is a plane, the groove has a second groove surface (115) adjacent to the first groove surface (114), the second groove surface (115) is a plane and forms a third intersection line (123) with the first groove surface (114), the first groove surface (114) is a triangle, and the first intersection line (121), the second intersection line (122) and the third intersection line (123) are the three sides of the triangle.
2. The clamping blade according to claim 1, characterized in that, The angle between the first groove surface (114) and the first end surface (111) is 25°~30°.
3. The clamping blade according to claim 1 or 2, characterized in that, The groove is formed by grinding.
4. The clamping blade according to claim 1 or 2, characterized in that, The clamping blade (1) is an indexable blade, and the plurality of grooves are respectively opened on different edges of the first end face (111).
5. The clamping blade according to claim 1 or 2, characterized in that, The clamped insert (1) has a mounting hole (140) in the middle, which is configured to connect with the tool holder of a lathe tool to mount the clamped insert (1) onto the tool holder.
6. A lathe tool, characterized in that, include: Handle; and The clamping blade (1) according to any one of claims 1 to 5 is mounted on one end of the tool holder.