Indexable turning blade for semi-finishing

Abstract

The utility model discloses an indexable turning blade for semi-finishing, which is characterized in that an upper end face and a lower end face are polygonal structures, adjacent side end faces are in smooth connection, a first cutting edge is formed at the intersection of the lower end face and / or the upper end face and each side end face, a second cutting edge is formed at the intersection of the lower end face and / or the upper end face and each cambered surface, and a plurality of chip breaking tables are formed on the lower end face and / or the upper end face. Chip grooves are formed between the chip breaking tables and the first cutting edge and the second cutting edge which are adjacent to the chip breaking tables, and an island is formed between every two adjacent chip breaking tables. The chip breaking tables which are similar in shape and the same in surface area are arranged on the lower end face and / or the upper end face, the protruding rib tables and the water-drop-shaped tables are arranged on the sides of the chip breaking tables, it can be guaranteed that under different cutting depths, chips can be lifted, the deformation degree can be increased, a space can be formed among the protruding rib tables, the second front cutter face, the groove bottom and the chip rolling face, and the chip rolling effect is improved. And the chip rolling radius can be reduced, chip deformation is increased, the excellent chip breaking effect is achieved, meanwhile, the strength of the cutting edge of the blade is improved, and the service life of the blade is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of turning tools, and particularly to a indexable turning blade for semi-finishing machining. Background Art

[0002] In the turning processing production of common steel parts and ductile and vermicular graphite iron parts, the cutting allowance range for semi-finishing is generally 1.0 mm to 3.0 mm, which is the most common machining accuracy requirement for such products at present. During processing production, the chip holding and chip evacuation performance of the tool not only affect the machining accuracy, but also affect the strength and sharpness of the tool due to heat dissipation problems, and affect the service life of the tool. Therefore, the design and processing of the tool itself have been continuously optimized in order to find a better balance among reducing cutting resistance, improving cutting efficiency, and extending the tool life. Summary of the Utility Model

[0003] Aiming at the problems existing in the above-mentioned prior art, the utility model provides an indexable turning blade for semi-finishing machining, which can ensure that under different cutting depths, the chips can be lifted, the deformation degree can be increased, and a space formed between the convex rib platform and the chip evacuation groove can reduce the chip curling radius and increase the chip deformation, thereby achieving an excellent chip breaking effect. At the same time, it also helps to improve the strength of the blade edge and extend the service life of the blade.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] The indexable turning blade for semi-finishing machining includes a blade body, wherein:

[0006] The blade body includes an upper end face, a lower end face, and a plurality of side end faces connecting therebetween. The lower end face and / or the upper end face is a polygonal structure. A positioning hole groove is provided at the geometric center of the blade body. Two adjacent side end faces are smoothly connected through an arc surface. A first cutting edge is formed at the intersection of the lower end face and / or the upper end face and each side end face. A second cutting edge is formed at the intersection of the lower end face and / or the upper end face and each arc surface. Each second cutting edge is a fillet;

[0007] On the lower end face and / or the upper end face, a chip breaking platform is formed beside each arc surface. A plurality of chip breaking platforms are similar in shape and the same in surface area. A chip evacuation groove is formed between each chip breaking platform and its adjacent first cutting edge and second cutting edge. The contour edge of each chip breaking platform is an arc surface, and two or more convex rib platforms and a water droplet-shaped platform are formed on one side thereof; An island is formed between two adjacent chip breaking platforms. The contour surface of each island is a smoothly connected curved surface, and it is smoothly connected with each chip breaking platform through a smooth surface. Each smooth surface extends to the edge of the positioning hole groove and is smoothly connected with it;

[0008] The positioning hole groove is arc-connected to the chip-breaking platform.

[0009] As a further elaboration of the above technical solution:

[0010] In the above technical solution, each of the chip-breaking platforms is a centrally symmetric structure and is in a herringbone or heart shape, and the distance between its foremost end and each of the second cutting edges is between 0.4 mm and 1 mm.

[0011] In the above technical solution, a first rake face, a second rake face, a flute bottom, and a chip curling face are formed in each of the chip removal grooves: the first rake face is a convex arc surface, and a first rake angle is formed between it and the horizontal plane; the second rake face is an inclined surface, and a second rake angle is formed between it and the horizontal plane; the chip curling face is a concave arc surface, and the longitudinal angle between it and the chip-breaking platform is between 6° and 17°, and the transverse angle between it and the chip-breaking platform is between 26° and 50°.

[0012] In the above technical solution, each of the first rake angles is between 7° and 13°.

[0013] In the above technical solution, each of the second rake angles is between 15° and 25.5°.

[0014] In the above technical solution, the width of each of the first rake faces is between 0.21 mm and 0.41 mm, the height difference between it and the chip-breaking platform is between 0.15 mm and 0.3 mm, and the distance between the second cutting edge and the chip-breaking platform is between 2 mm and 3.79 mm.

[0015] In the above technical solution, the height difference between each of the flute bottoms and the chip-breaking platform is between 0.23 mm and 0.36 mm, the height difference between it and the first cutting edge is between 0.15 mm and 0.56 mm, and the distance between the first cutting edge and the chip-breaking platform is between 1.3 mm and 3.2 mm.

[0016] In the above technical solution, the blade body is in a rhombus, equilateral triangle, peach shape, or square structure. Among them, the included angle between the two side end faces of the rhombus body structure is 55° or 35°, and the included angle between the two side end faces of the peach-shaped body structure is 80°.

[0017] In the above technical solution, the upper end face and the lower end face are respectively a positive angular end face or a negative angular end face.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: By providing a plurality of chip breaking platforms with similar shapes and the same surface area on the lower end face and / or the upper end face, and providing a raised rib platform and a water droplet-shaped platform beside them, it can ensure that the chips can be lifted at different cutting depths, increasing the degree of deformation. Moreover, the space formed between the raised rib platform, the second rake face, the bottom of the groove, and the chip curling face can reduce the chip curling radius and increase the chip deformation, thereby achieving an excellent chip breaking effect. At the same time, it also helps to improve the edge strength of the blade and extend the service life of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the first embodiment;

[0020] Figure 2 is a front view structural diagram of the first embodiment;

[0021] Figure 3 is Figure 2 a partial enlarged view of part B in

[0022] Figure 4 is Figure 2 a sectional view taken along D-D of

[0023] Figure 5 is Figure 2 a sectional view taken along A-A of

[0024] Figure 6 is a front view structural diagram of the second embodiment (positive and negative angle type);

[0025] Figure 7 is a front view structural diagram of the third embodiment (positive and negative angle type);

[0026] Figure 8 is a front view structural diagram of the fourth embodiment (negative angle type);

[0027] Figure 9 is a front view structural diagram of the fifth embodiment (positive and negative angle type).

[0028] In the figure: 1, positioning hole groove; 2a, upper end face; 2b, lower end face; 3, side end face; 4, arc surface; 5, first cutting edge; 6, second cutting edge; 7, chip breaking platform; 8, chip evacuation groove; 801, first rake face; 802, second rake face; 803, bottom of the groove; 804, chip curling face; 9, raised rib platform; 10, water droplet-shaped platform; 11, island; 12, smooth surface;

[0029] A1, longitudinal angle between the chip curling face and the chip breaking platform; A2, transverse angle between the chip curling face and the chip breaking platform;

[0030] L1, distance between the chip breaking platform and the second cutting edge;

[0031] L2, width of the first rake face;

[0032] L3, distance between the second cutting edge and the chip breaker;

[0033] L4, height difference between the first rake face and the chip breaker;

[0034] L5, height difference between the bottom of the groove and the chip breaker;

[0035] L6, distance between the first cutting edge and the chip breaker;

[0036] L7, height difference between the bottom of the groove and the second cutting edge. Detailed implementation mode

[0037] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0038] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a number of" and "a plurality of" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the non-direct contact between the first and second features but through additional features therebetween. Moreover, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0039] As Figures 1 - 3 shown, the indexable turning insert for semi-finishing includes a blade body, wherein:

[0040] The blade body includes an upper end face 2a, a lower end face 2b, and a plurality of side end faces 3 connecting therebetween. The lower end face 2b and / or the upper end face 2a are both of polygonal structures. A positioning hole groove 1 is provided at the geometric center of the blade body. Two adjacent side end faces 3 are smoothly connected through an arc surface 4. The intersection of the lower end face 2b and each side end face 3 and / or the intersection of the upper end face 2a and each side end face 3 forms a first cutting edge 5. The intersection of the lower end face 2b and each arc surface 4 and / or the intersection of the upper end face 2a and each arc surface 4 forms a second cutting edge 6. Each second cutting edge 6 is a fillet;

[0041] A chip breaker platform 7 is formed on the lower end face 2b and / or the upper end face 2a beside each arc surface 4. A number of chip breaker platforms 7 are similar in shape and have the same surface area. A chip evacuation groove 8 is formed between each chip breaker platform 7 and its adjacent first cutting edge 5 and second cutting edge 6. The contour edge of each chip breaker platform 7 is an arc surface, and two or more protruding rib platforms 9 and a water droplet-shaped platform 10 are formed on one side thereof; An island 11 is formed between two adjacent chip breaker platforms 7. The contour surface of each island 11 is a smoothly connected curved surface, and it is transitionally connected to each chip breaker platform 7 through a smooth surface 12. Each smooth surface 12 extends to the edge of the positioning hole groove 1 and is smoothly connected thereto;

[0042] The positioning hole groove 1 is arc-connected to the chip breaker platform 7.

[0043] In this embodiment, each chip breaker platform 7 is a centrally symmetric structure and is in a herringbone or heart shape. The distance L1 between its foremost end and each second cutting edge 6 is between 0.4 mm and 1 mm.

[0044] It can be understood that when the cutting waste chips enter the chip evacuation groove 8 and are raised and guided to different chip breaker platforms 7 through a plurality of protruding rib platforms 9 and / or a water droplet-shaped platform 10, they will have different curling degrees, so as to achieve different chip breaking effects by changing the shape of the waste chips, and further change the influence of the waste chips on the blade. In application, according to the needs of the actual processing material and processing accuracy, an appropriate arc surface 4 can be selected to be close to the product to be cut. The first cutting edge 5, the second cutting edge 6 formed by the blade body at this place, together with the adjacent chip breaker platform 7, chip evacuation groove 8, protruding rib platform 9, water droplet-shaped platform 10, and island 11 and smooth surface 12, can form different chip breaking effects, and further affect the cutting accuracy and cutting efficiency of the cutting edge, and affect the service life of the cutting edge.

[0045] Such as Figures 4 - 5As shown, a first rake face 801, a second rake face 802, a flute bottom 803 and a chip curling face 804 are formed in each chip evacuation groove 8: The first rake face 801 is a convex arc face, and a first rake angle is formed between it and the horizontal plane; the second rake face 802 is an inclined plane, and a second rake angle is formed between it and the horizontal plane; the chip curling face 804 is a concave arc face, and the longitudinal angle A1 between it and the chip breaker 7 is between 6° and 17°, and the transverse angle A2 between them is between 26° and 50°.

[0046] In this embodiment, each first rake angle is between 7° and 13°, and each second rake angle is between 15° and 25.5°; the width L2 of each first rake face 801 is between 0.21 mm and 0.41 mm, and the height difference L4 between it and the chip breaker 7 is between 0.15 mm and 0.3 mm. The distance L3 between the second cutting edge 6 and the chip breaker is between 2 mm and 3.79 mm; the height difference L5 between each flute bottom 803 and the chip breaker 7 is between 0.23 mm and 0.36 mm, and the height difference L7 between it and the first cutting edge 5 is between 0.15 mm and 0.56 mm. The distance L6 between the first cutting edge 5 and the chip breaker 7 is between 1.3 mm and 3.2 mm.

[0047] By providing a chip breaker 7 with a similar shape and the same surface area on the lower end face 2b and / or the upper end face 2a, and providing a convex rib platform 9 and a water droplet-shaped platform 10 beside it, the present utility model can ensure that chips can be lifted under different cutting depths, increasing the degree of deformation. And the space formed between the convex rib platform 9, the second rake face 802, the flute bottom 803 and the chip curling face 804 can reduce the chip curling radius and increase the chip deformation, thereby achieving an excellent chip breaking effect. At the same time, it also helps to improve the strength of the blade edge and extend the service life of the blade.

[0048] As Figure 1 、 6 As shown in FIGS. -9, in some embodiments of the present utility model, the blade body is respectively in the structures of a square, a rhombus, an equilateral triangle and a peach shape. Among them, the angle between the two end faces 3 of the rhombus body structure is 55° or 35°, and the angle between the two end faces 3 of the peach-shaped body structure is 80°. And in these embodiments, the upper end face 2a and the lower end face 2b are positive-angle end faces or negative-angle end faces.

[0049] The above does not impose any limitation on the technical scope of the present utility model. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. Indexable turning inserts for semi-finishing, comprising a blade body, characterized in that ； The blade body includes an upper end face, a lower end face, and a plurality of side end faces connecting therebetween. The lower end face and / or the upper end face is a polygonal structure. A positioning hole groove is provided at the geometric center of the blade body. Two adjacent side end faces are smoothly connected through an arc surface. A first cutting edge is formed at the intersection of the upper and lower end faces and / or the upper end face with each side end face. A second cutting edge is formed at the intersection of the lower end face and / or the upper end face with each arc surface. Each second cutting edge is a rounded corner; A chip breaker platform is formed on the lower end face and / or the upper end face beside each arc surface. A number of the chip breaker platforms are similar in shape and have the same surface area. A chip evacuation groove is formed between each chip breaker platform and its adjacent first cutting edge and second cutting edge. The contour edge of each chip breaker platform is an arc surface, and there are more than two convex rib platforms and a water droplet-shaped platform formed on one side thereof; An island is formed between two adjacent chip breaker platforms. The contour surface of each island is a smoothly connected curved surface, and it is transitionally connected to each chip breaker platform through a smooth surface. Each smooth surface extends to the edge of the positioning hole groove and is smoothly connected thereto; The positioning hole groove is arc-connected to the chip breaker platform.

2. The indexable turning insert for semi-finishing according to claim 1, characterized in that, Each chip breaker platform is a centrally symmetric structure and is in a herringbone or heart shape. The distance between its front end and each second cutting edge is between 0.4 mm and 1 mm.

3. The indexable turning insert for semi-finishing according to claim 1, characterized in that, A first rake face, a second rake face, a groove bottom, and a chip curling face are formed in each chip evacuation groove: The first rake face is a convex arc surface, and a first rake angle is formed between it and the horizontal plane; The second rake face is an inclined plane, and a second rake angle is formed between it and the horizontal plane; The chip curling face is a concave arc surface, and the longitudinal angle between it and the chip breaker platform is between 6° and 17°, and the transverse angle between it and the chip breaker platform is between 26° and 50°.

4. The indexable turning insert for semi-finishing according to claim 3, characterized in that, Each first rake angle is between 7° and 13°.

5. The indexable turning insert for semi-finishing according to claim 3, characterized in that, Each second rake angle is between 15° and 25.5°.

6. The indexable turning insert for semi-finishing according to claim 3, characterized in that, The width of each first rake face is between 0.21 mm and 0.41 mm, the height difference between it and the chip breaker platform is between 0.15 mm and 0.3 mm, and the distance between the second cutting edge and the chip breaker platform is between 2 mm and 3.79 mm.

7. The indexable turning insert for semi-finishing according to claim 3, characterized in that, The height difference between each groove bottom and the chip breaker platform is between 0.23 mm and 0.36 mm, the height difference between it and the first cutting edge is between 0.15 mm and 0.56 mm, and the distance between the first cutting edge and the chip breaker platform is between 1.3 mm and 3.2 mm.

8. The indexable turning insert for semi-finishing according to any one of claims 1-7, characterized in that, The blade body is in a diamond, equilateral triangle, peach, or square structure. Among them, the included angle between two side end faces of the diamond body structure is 55° or 35°, and the included angle between two side end faces of the peach body structure is 80°.

9. The indexable turning insert for semi-finishing according to claim 8, characterized in that, The upper end face and the lower end face are respectively a positive angular end face or a negative angular end face.

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