Turning blade for heavy-load rough machining of high-temperature alloy and stainless steel

Abstract

The utility model discloses a turning blade for heavy-load rough machining of high-temperature alloy and stainless steel, the upper end part and the lower end part of a blade main body are both polygonal structures, main cutting edges or auxiliary cutting edges are formed at the joints of the upper end part and the lower end part and each side wall connected with the upper end part and the lower end part, and the main cutting edges and the auxiliary cutting edges are arranged at intervals; polygonal chip breaking tables are formed in the middle of the upper end face and the middle of the lower end face respectively, and the number of the side edges of the chip breaking tables is the same as that of the upper side edges of the blade body. A sharp cutting edge can be formed, the deformation degree of cuttings can be increased, the cuttings can be guided to flow out smoothly, meanwhile, the strength of the cutting edge is increased, the service life is prolonged, cutting force can be reduced, the deformation degree of material grains is reduced, the surface hardening degree of a workpiece is reduced, built-up edges are avoided, cutting heat is controlled, and the service life of the cutting edge is prolonged. The utility model particularly relates to heavy and rough cutting machining of high-temperature alloys such as GH4169 and Inconel 718 and difficult-to-machine materials such as stainless steel.

Description

Technical Field

[0001] The utility model relates to the field of turning technology, in particular to a turning insert required for heavy-load rough cutting of difficult-to-machine materials such as high-temperature alloys such as GH4169 and Inconel 718, and stainless steel. Background Art

[0002] With the rapid development of aerospace, military, and nuclear energy industries, high-temperature alloys like GH4169 and Inconel 718, as well as difficult-to-machine materials like stainless steel, are increasingly being used. However, the heavy-duty roughing applications for these materials have long been dominated by inserts imported from Europe and the United States. These products are expensive, have short service lives, and are based on 1990s-era technology, which no longer meets the production needs of modern products. Currently, the market demands cutting depths of cut (Ap) of 5-9mm and feed rates (f) of 0.3-0.5mm / t. There is an urgent need for turning inserts that meet these demands while maintaining a reasonable service life and cost. Utility Model Content

[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides a turning tool for heavy-duty rough machining of high-temperature alloys and stainless steel. The blade has a sharp cutting edge, which can increase the degree of chip deformation and guide the chips to flow out smoothly. At the same time, it increases the edge strength, extends the service life, and can reduce the cutting force, reduce the degree of material grain deformation, and thus reduce the degree of surface hardening of the workpiece, avoid the generation of built-up edge, and thus control the cutting heat. It is particularly suitable for heavy rough cutting of high-temperature alloys such as GH4169 and Inconel 718 and difficult-to-machine materials such as stainless steel.

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

[0005] Turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel, comprising an insert body, wherein:

[0006] The upper end and the lower end of the blade body are both of the same polygonal structure, the upper end and the lower end are smoothly connected to each side wall, the two adjacent side walls are also connected in arcs, and the intersections of the two adjacent side walls with the upper end and the lower end are formed with rounded cutting tips; the upper end and the lower end are connected to each side wall connected thereto and are formed with a main cutting edge or a secondary cutting edge, a plurality of the main cutting edges and the secondary cutting edges on the upper end and the lower end are spaced apart, and a teardrop-shaped platform is formed at the intersection of each main cutting edge and the secondary cutting edge;

[0007] A polygonal chip breaker is formed in the middle of the upper end face and the lower end face, the number of its side edges is the same as the number of the upper side edges of the blade body, and a plurality of raised ribs are formed between each side edge of the chip breaker and the upper end portion or the lower end portion of the blade body, and the plurality of raised ribs are smoothly connected to the blade body; a chip breaking space is formed between each main cutting edge and the two adjacent teardrop-shaped platforms and one side edge of the chip breaker;

[0008] A positioning hole is set at the geometric center of the blade body, and the positioning hole vertically penetrates the blade body.

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

[0010] In the above technical solution, each of the chip breaking spaces is formed with a first rake face, a second rake face, a groove bottom face and an anti-chip face, the first rake face forms a first rake angle with the horizontal base surface, and the second rake face forms a second rake angle with the horizontal base surface.

[0011] In the above technical solution, each of the first rake faces is a convex arc surface, and each of the first rake angles is between 11.9° and 13.7°; each of the second rake faces is a bevel surface, and each of the second rake angles is between 15.3° and 23.0°.

[0012] In the above technical solution, the side walls of the chip breaking platform close to each chip breaking space are all Z-shaped structures, and an island is formed beside the bending part of the side wall in each chip breaking space.

[0013] In the above technical solution, the blade body and the chip breaker are both diamond-shaped or hexagonal peach-shaped structures, and the angle between the side wall where each main cutting edge is located and the adjacent side wall is 80°.

[0014] In the above technical solution, the positioning hole is a threaded hole with a countersunk structure at one end, and the countersunk end is smoothly connected to the chip breaker.

[0015] Compared with the prior art, the beneficial effect of the present invention is that: compared with the turning inserts on the market, the present invention forms a sharp cutting edge by setting a wider chip breaking space and setting raised ribs, teardrop-shaped platforms and islands inside and on the edges thereof, and can increase the degree of chip deformation, guide the chips to flow out smoothly, and at the same time increase the cutting edge strength and extend the service life. When the cutting is deep, the cutting force can be reduced, the degree of material grain deformation can be reduced, and the degree of hardening of the workpiece surface can be reduced, thereby avoiding the generation of built-up edge and controlling the cutting heat. It is particularly suitable for heavy rough cutting of difficult-to-machine materials such as high-temperature alloys such as GH4169 and Inconel 718 and stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the top view structure;

[0018] Figure 3 yes Figure 2 A magnified schematic diagram of the structure of part A;

[0019] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0020] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure of CC;

[0021] Figure 6 It is a schematic top view of another embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] The embodiments described with reference to the accompanying drawings are illustrative and intended to explain the present application, and should not be construed as limiting the present application. In the description of this application, it should be understood that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "a plurality" mean two or more, unless otherwise specifically defined. In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0024] like Figure 1-3 As shown, a turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel comprises an insert body, wherein:

[0025] The upper end 1a and the lower end 1b of the blade body are both of the same polygonal structure. The upper end 1a and the lower end 1b are smoothly connected to each side wall 2, and the two adjacent side walls 2 are also connected in an arc shape. The intersection of the two adjacent side walls 2 with the upper end 1a and the lower end 1b forms a rounded cutting edge 3; the upper end 1a and the lower end 1b are connected to each side wall 2 formed with a main cutting edge 4 or a secondary cutting edge 5. The upper end 1a and the lower end 1b are provided with a plurality of main cutting edges 4 and secondary cutting edges 5 at intervals, and a teardrop-shaped platform 6 is formed at the intersection of each main cutting edge 4 and the secondary cutting edge 5.

[0026] A polygonal chip breaker platform 7 is formed in the middle of the upper end surface 1a and the lower end surface 1b, and the number of its side edges is the same as the number of the upper side edges of the blade body. A plurality of raised ribs 8 are formed between each side edge of the chip breaker platform 7 and the upper end portion 1a or the lower end portion 1b of the blade body, and the plurality of raised ribs 8 are smoothly connected to the blade body; a chip breaking space 9 is formed between each main cutting edge 4 and the two adjacent teardrop-shaped platforms 6 and one side edge of the chip breaker platform 7;

[0027] A positioning hole 10 is set at the geometric center of the blade body, and the positioning hole 10 vertically passes through the blade body.

[0028] like Figure 4-5 As shown, a first rake face 901, a second rake face 902, a groove bottom surface 903 and an anti-chip surface 904 are formed in each chip breaking space 9. The first rake face 901 forms a first rake angle with the horizontal base surface, and the second rake face 902 forms a second rake angle with the horizontal base surface; each first rake face 901 is a convex arc surface, and each first rake angle is between 11.9° and 13.7°; each second rake face 902 is a bevel, and each second rake angle is between 15.3° and 23.0°.

[0029] In this embodiment, the width L1 of the first front cutting edge 901 is between 0.34-0.37 mm, the height difference L2 between the rounded cutting edge 3 and the bottom surface of the groove 903 is between 0.27-0.45 mm, the height difference L3 between the chip breaker 7 and the bottom surface of the groove 903 is between 0.5-0.68 mm, the distance L4 between the chip breaker 7 and the secondary cutting edge 5 is between 1.6-2.2 mm, the transverse angle A1 between the anti-chip surface 904 and the chip breaker 7 is between 12-17°, the height difference L5 between the main cutting edge 4 and the bottom surface of the groove 903 is between 3.45-5.57 mm, the distance L6 between the chip breaker 7 and the main cutting edge 4 is between 2.07-4.45 mm, and the vertical angle A2 is between 28.6-31.1°.

[0030] like Figure 1-2 As shown, the side walls of the chip breaking platform 7 close to each chip breaking space 9 are all Z-shaped structures, and an island 11 is formed beside the bending part of the side wall in each chip breaking space 9.

[0031] During machining, the main cutting edge 4 cuts the workpiece, and the chips flow along the first rake face 901, the second rake face 902, and the groove bottom surface 903 and produce the first deformation. During this period, the chips encounter the raised rib 8, the teardrop-shaped platform 6 and the side wall of the Z-shaped structure on the chip breaker 7. The chips are lifted up and undergo a second deformation and become wider and thicker, which can effectively reduce the resistance per unit area of ​​the cutting edge, slow down vibration, and extend the tool life; when the chips encounter the anti-chip surface 904, the degree of curling will further increase, the curvature will sharply decrease, and the chips will undergo a third large deformation. Under the blocking and pushing action of the island 11, a good chip breaking effect is achieved.

[0032] like Figure 3 、 6 As shown, in some embodiments of the present invention, the blade body and the chip breaker 7 are both rhombus-shaped or hexagonal peach-shaped structures, and the angle between the side wall where each main cutting edge 4 is located and the adjacent side wall is 80°.

[0033] In this embodiment, the top surfaces of the chip breaker platforms 7 on the upper end 1a and the lower end 1b are marked with the groove type code and the numerical code of the radius of the rounded tool tip 3 on the side of the junction of the two side walls to facilitate identification and use.

[0034] In some embodiments of the present invention, the positioning hole 10 is a threaded hole with a countersunk structure at one end, and the countersunk end is smoothly connected to the chip breaker 7 .

[0035] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel, comprising an insert body, characterized in that: The upper end and the lower end of the blade body are both of the same polygonal structure, the upper end and the lower end are smoothly connected to each side wall, the two adjacent side walls are also connected in an arc shape, and the intersections of the two adjacent side walls with the upper end and the lower end are formed with rounded cutting edges; the upper end and the lower end are connected to each side wall where they are connected to form a main cutting edge or a secondary cutting edge, a plurality of the main cutting edges and the secondary cutting edges on the upper end and the lower end are spaced apart, and a teardrop-shaped platform is formed at the intersection of each main cutting edge and the secondary cutting edge; A polygonal chip breaker platform is formed in the middle of the upper end and the lower end, and the number of its side edges is the same as the number of the upper side edges of the blade body. A plurality of raised rib platforms are formed between each side edge of the chip breaker platform and the upper end or the lower end edge of the blade body, and the plurality of raised rib platforms are smoothly connected to the blade body; a chip breaking space is formed between each main cutting edge and the two adjacent teardrop-shaped platforms and one side edge of the chip breaker platform; A positioning hole is set at the geometric center of the blade body, and the positioning hole vertically penetrates the blade body.

2. The turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel according to claim 1, characterized in that: A first rake face, a second rake face, a groove bottom face and an anti-chip face are formed in each chip breaking space. The first rake face forms a first rake angle with a horizontal base surface, and the second rake face forms a second rake angle with the horizontal base surface.

3. The turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel according to claim 2, characterized in that: Each of the first rake faces is a convex arc surface, and each of the first rake angles is between 11.9° and 13.7°; each of the second rake faces is a bevel surface, and each of the second rake angles is between 15.3° and 23.0°.

4. The turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel according to claim 1, characterized in that: The side walls of the chip breaking platform close to each of the chip breaking spaces are all Z-shaped structures, and an island is formed beside the bending part of the side walls in each of the chip breaking spaces.

5. The turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel according to claim 1, characterized in that: The blade body and the chip breaker are both rhombus-shaped or hexagonal peach-shaped structures, and the angle between the side wall where each main cutting edge is located and the adjacent side wall is 80°.

6. The turning insert for heavy-duty rough machining of high-temperature alloys and stainless steel according to any one of claims 1 to 5, characterized in that: The positioning hole is a threaded hole with a countersunk structure at one end, and the countersunk end is smoothly connected to the chip breaker.

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