Double-sided eight-blade corn cutter

Abstract

The application discloses a double-face eight-blade corn milling cutter, which comprises a cutter head and a cutter blade body matched with the cutter head, the cutter blade body is in a hexahedron shape, a screw hole penetrating through the center of the cutter blade body is arranged, the cutter blade body comprises a bottom mounting surface, a side mounting surface and eight cutting edges, the cutting edges comprise a main cutting edge, a polishing edge connected with the main cutting edge in an arc transition mode and a tool tip circular arc connected with the polishing edge, a spiral-shaped chip removal groove is arranged on the outer circumferential surface of the cutter head, a plurality of mounting seats are arranged in the direction of the chip removal groove, the mounting seats are matched with the side mounting surface and the bottom mounting surface of the cutter blade body, and the cutter blade is locked through assembling screws, and the cutter blade body is locked in the mounting seat; the corn milling cutter is designed as a double-face eight-blade indexable cutter blade, the economy of the whole corn milling cutter is improved through the increase of the number of cutting edges; meanwhile, a light-weight weight-reducing groove is designed on the cutter head, the amount of material is reduced by 7% compared with the conventional cutter head design, the tungsten resource loss is further reduced, and the economy is improved.

Description

Technical Field

[0001] This utility model belongs to the field of milling cutter technology, and in particular, relates to a double-sided eight-flute corn milling cutter. Background Technology

[0002] Corn milling cutters are machining tools used in the machining industry. They are mainly produced by powder metallurgy using tungsten carbide powder as raw material. The cutting edge is mounted on a matching milling cutter head like a corn kernel. Commonly available corn milling cutters include single-sided 2-flute, single-sided 3-flute, double-sided 4-flute, and double-sided 6-flute cutters. However, the number of cutting edges can be increased to reduce the economic cost per cutting edge.

[0003] The existing patent publication number CN118663959A discloses an anti-interference milling insert and cutter head, including a first surface, a second surface, a side mounting surface, and a main cutting edge. Adjacent main cutting edges are connected sequentially in a clockwise direction by a tool tip arc and a finishing edge. The finishing edge is an arc-shaped finishing edge. There is a transition surface between the tool tip arc and the first / second surface. The main cutting edge has an angle with the first or second surface, so that the transition surface integrally connected with the rake face of the finishing edge has an arc-shaped concave structure. This application does not specifically disclose its cutter head structure.

[0004] Patent CN207840247U discloses a vertically mounted corn milling cutter, including a housing. The housing has a connecting cavity along its axis for connecting a power shaft. Multiple rings of milling cutters are arranged circumferentially on the outer surface of the housing. The projections of the milling cutters along the axial direction do not overlap and are sequentially connected to form a ring. The milling cutters in that application are 4-flute cutters, which are less economical. Furthermore, the housing structure can only accommodate the 4-flute cutters and cannot be used in this application. Utility Model Content

[0005] This invention addresses the problem of high average single-edge consumption cost caused by the small number of cutting edges in existing corn milling cutters by providing a double-sided eight-edge corn milling cutter.

[0006] The technical solution of this utility model is:

[0007] A double-sided eight-flute corn milling cutter includes a cutter head and a cutter body that is mounted in conjunction with the cutter head. The cutter body is hexahedral in shape with a through screw hole in the center. It includes a bottom mounting surface, a side mounting surface, and eight cutting edges. Each cutting edge includes a main cutting edge, a finishing edge that is curvedly connected to the main cutting edge, and a tip arc connected to the finishing edge. The main cutting edge has a curved rake face on the bottom mounting surface side and a flat flank face on the side mounting surface side. The finishing edge has a curved surface on the bottom mounting surface side. The cutting edge has a rake face with a finishing edge and an arc-shaped flank face with a finishing edge on the side mounting surface. A spiral chip removal groove is provided on the outer circumference of the cutter head, and multiple mounting seats are provided along the direction of the chip removal groove. The mounting seats mate with the side mounting and bottom mounting surfaces of the cutter body, and the cutter is then locked in place by mounting screws. After the cutter body is locked in place, the cutting edges on the outer circumference of the cutter are on the same cylindrical surface. In the vertical direction between two adjacent cutters in the same chip removal groove, the tip of the latter cutter is 0.1–0.3 mm lower than the tip of the former cutter.

[0008] Furthermore, the cutter head is provided with a weight reduction groove.

[0009] Furthermore, the axial mounting rake angle of the blade body on the mounting base is -1.2°±1°, and the radial mounting clearance angle is -13.7°±5°.

[0010] Furthermore, the blade body has a cutting edge band on the cutting edge.

[0011] Furthermore, the blade body is a pressed blade.

[0012] Furthermore, the blade body is a ground blade.

[0013] Furthermore, the blade surface is coated with a wear-resistant coating.

[0014] Furthermore, the cutter head is provided with an internal cooling hole, one end of which is connected to the spindle cooling water channel, and the other end faces the cutter body.

[0015] Furthermore, the diameter of the cutter head is 63mm.

[0016] Furthermore, the chip removal grooves are configured as four, spirally distributed along the outer circumference of the cutter head; each chip removal groove has four mounting seats in its direction.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model discloses a double-sided eight-blade corn milling cutter. The cutter body is designed with eight blades on both sides and is equipped with a matching cutter head. By increasing the number of cutting edges, the overall economy of the corn milling cutter is improved. At the same time, a lightweight weight-reducing groove is designed on the cutter head, which reduces the material usage by 7% compared with the conventional cutter head design, further reducing the loss of tungsten resources and improving its economy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the double-sided eight-flute corn milling cutter structure of this application;

[0020] Figure 2 This is a schematic diagram of the main structure of the blade in this application;

[0021] Figure 3 This is a schematic diagram of the outer circumferential surface of the cutting tool after it has been assembled onto the cutter head.

[0022] Figure 4 A schematic diagram of a corn milling cutter with a single-sided double-edged insert;

[0023] The components are as follows: 1. Cutter head; 11. Weight reduction groove; 12. Chip removal groove; 13. Internal cooling hole; 2. Insert body; 20. Screw hole; 21. Main cutting edge; 22. Finishing edge; 23. Cutting tip arc; 24. Cutting edge band; 25. Side mounting surface; 26. Bottom mounting surface; 27. Finishing edge rake face; 28. Finishing edge flank face; 29. ​​Main cutting edge flank face; 291. Main cutting edge rake face; 3. Screw. Detailed Implementation

[0024] To clearly illustrate the technical features of this utility model, the following detailed description is provided through specific embodiments and in conjunction with the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] Furthermore, in the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Example 1

[0030] like Figures 1 to 4As shown, this embodiment provides a double-sided eight-flute corn milling cutter, including a cutter head 1 and a cutter body 2 installed in conjunction with the cutter head 1. The cutter body 2 is hexahedral in shape, with a through screw hole 20 in the center, and includes a bottom mounting surface 26, a side mounting surface 25, and eight cutting edges. The cutting edges are provided with a cutting edge band 24. The cutting edges include a main cutting edge 21, a finishing edge 22 that is arc-transitioned to the main cutting edge 21, and a tool tip arc 23 connected to the finishing edge 22. The main cutting edge 21 has a curved surface on the bottom mounting surface side. The main cutting edge has a rake face 291 and a planar flank face 29 on the side mounting surface. The finishing edge 22 has a curved finishing edge rake face 27 on the bottom mounting surface and an arc-shaped finishing edge flank face 28 on the side mounting surface. The outer circumference of the cutter head 1 has a spiral chip removal groove 12 and multiple mounting seats along the direction of the chip removal groove 21. The cutter head has a weight reduction groove 11. The mounting seats cooperate with the side mounting 25 and bottom mounting surface 26 of the insert body, and the insert is locked by the mounting screws 3.

[0031] After the blade body 2 is locked in the mounting base, the axial installation rake angle of the blade body 2 in the mounting base is -1.2°±1°, and the radial installation clearance angle is -13.7°±5°. Figure 3 As shown, the cutting edges on the outer circumference of the insert are on the same cylindrical surface. In the vertical direction of two adjacent inserts in the same chip removal groove, the tip of the latter insert is 0.1 to 0.3 mm lower than the tip of the former insert. Currently, most double-sided eight-blade inserts on the market cannot be made into corn milling cutters due to functional interference caused by structural design. In this embodiment, after the insert body is installed on the mounting base, all the cutting edges of the inserts are on the same cylindrical surface, and the tip of each subsequent insert must be 0.1 to 0.3 mm lower than the tip of the former insert. This ensures that the tool can machine a qualified vertical surface.

[0032] like Figure 4 As shown, this is a conventional single-sided double-edged corn milling cutter with a very heavy cutter head. In this embodiment, a weight-reducing groove is provided on the cutter head. Through the weight-reducing and lightweight design, the load on the machine tool can be reduced and energy can be saved.

[0033] In this embodiment, the blade body is a pressed blade, which has a simpler manufacturing process and is suitable for heavy-duty cutting.

[0034] Example 2

[0035] like Figures 1 to 4As shown, this embodiment provides a double-sided eight-flute corn milling cutter, including a cutter head 1 and a cutter body 2 installed in conjunction with the cutter head 1. The cutter body 2 is hexahedral in shape, with a through screw hole 20 in the center, and includes a bottom mounting surface 26, a side mounting surface 25, and eight cutting edges. The cutting edges are provided with a cutting edge band 24. The cutting edges include a main cutting edge 21, a finishing edge 22 that is arc-transitioned to the main cutting edge 21, and a tool tip arc 23 connected to the finishing edge 22. The main cutting edge 21 has a curved surface on the bottom mounting surface side. The main cutting edge has a rake face 291 and a planar flank face 29 on the side mounting surface. The finishing edge 22 has a curved finishing edge rake face 27 on the bottom mounting surface and an arc-shaped finishing edge flank face 28 on the side mounting surface. The outer circumference of the cutter head 1 has a spiral chip removal groove 12 and multiple mounting seats along the direction of the chip removal groove 21. The cutter head has a weight reduction groove 11. The mounting seats cooperate with the side mounting 25 and bottom mounting surface 26 of the insert body, and the insert is locked by the mounting screws 3.

[0036] After the blade body 2 is locked in the mounting base, the axial installation rake angle of the blade body 2 in the mounting base is -1.2°±1°, and the radial installation clearance angle is -13.7°±5°. Figure 3 As shown, the cutting edges on the outer circumference of the insert are on the same cylindrical surface. In the vertical direction of two adjacent inserts in the same chip removal groove, the tip of the latter insert is 0.1 to 0.3 mm lower than the tip of the former insert. Currently, most double-sided eight-blade inserts on the market cannot be made into corn milling cutters due to functional interference caused by structural design. In this embodiment, after the insert body is installed on the mounting base, all the cutting edges of the inserts are on the same cylindrical surface, and the tip of each subsequent insert must be 0.1 to 0.3 mm lower than the tip of the former insert. This ensures that the tool can machine a qualified vertical surface.

[0037] like Figure 4 As shown, this is a conventional single-sided double-edged corn milling cutter with a very heavy cutter head. In this embodiment, a weight-reducing groove is provided on the cutter head. Through the weight-reducing and lightweight design, the load on the machine tool can be reduced and energy can be saved.

[0038] In this embodiment, the blade body is a ground blade. The production process of ground blades is more complex, requiring the pressing blade to be ground, and it is more suitable for light-load cutting.

[0039] Example 3

[0040] like Figures 1 to 4As shown, this embodiment provides a double-sided eight-flute corn milling cutter, including a cutter head 1 and a cutter body 2 installed in conjunction with the cutter head 1. The cutter body 2 is hexahedral in shape, with a through screw hole 20 in the center, and includes a bottom mounting surface 26, a side mounting surface 25, and eight cutting edges. The cutting edges are provided with a cutting edge band 24. The cutting edges include a main cutting edge 21, a finishing edge 22 that is arc-transitioned to the main cutting edge 21, and a tool tip arc 23 connected to the finishing edge 22. The main cutting edge 21 has a curved surface on the bottom mounting surface side. The main cutting edge has a rake face 291 and a planar flank face 29 on the side mounting surface. The finishing edge 22 has a curved finishing edge rake face 27 on the bottom mounting surface and an arc-shaped finishing edge flank face 28 on the side mounting surface. The outer circumference of the cutter head 1 has a spiral chip removal groove 12 and multiple mounting seats along the direction of the chip removal groove 21. The cutter head has a weight reduction groove 11. The mounting seats cooperate with the side mounting 25 and bottom mounting surface 26 of the insert body, and the insert is locked by the mounting screws 3.

[0041] After the blade body 2 is locked in the mounting base, the axial installation rake angle of the blade body 2 in the mounting base is -1.2°±1°, and the radial installation clearance angle is -13.7°±5°. Figure 3 As shown, the cutting edges on the outer circumference of the insert are on the same cylindrical surface. In the vertical direction of two adjacent inserts in the same chip removal groove, the tip of the latter insert is 0.1 to 0.3 mm lower than the tip of the former insert. Currently, most double-sided eight-blade inserts on the market cannot be made into corn milling cutters due to functional interference caused by structural design. In this embodiment, after the insert body is installed on the mounting base, all the cutting edges of the inserts are on the same cylindrical surface, and the tip of each subsequent insert must be 0.1 to 0.3 mm lower than the tip of the former insert. This ensures that the tool can machine a qualified vertical surface.

[0042] like Figure 4 As shown, this is a conventional single-sided double-edged corn milling cutter with a very heavy cutter head. In this embodiment, a weight-reducing groove is provided on the cutter head. Through the weight-reducing and lightweight design, the load on the machine tool can be reduced and energy can be saved.

[0043] Furthermore, the blade surface is coated with a wear-resistant coating, and the cutter head is provided with an internal cooling hole 13. One end of the internal cooling hole is connected to the spindle cooling water channel or the spindle exhaust, and the other end faces the blade body, further reducing the wear of the blade due to high temperature during processing.

[0044] Obviously, the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A double-sided eight-flute corn milling cutter, comprising a cutter head and a cutting insert body mounted in conjunction with the cutter head, characterized in that: The blade body is hexahedral in shape with a through screw hole in the center. It includes a bottom mounting surface, a side mounting surface, and eight cutting edges. Each cutting edge includes a main cutting edge, a finishing edge that is curved and connected to the main cutting edge, and a tool tip arc connected to the finishing edge. The main cutting edge has a curved rake face on the bottom mounting surface and a flat flank face on the side mounting surface. The finishing edge has a curved rake face on the bottom mounting surface and an arc-shaped flank face on the side mounting surface. The outer circumferential surface of the cutter head is provided with a spiral chip removal groove, and multiple mounting seats are provided along the direction of the chip removal groove. The mounting seats are matched with the side mounting and bottom mounting surfaces of the blade body, and the blade is locked by mounting screws. After the blade body is locked in the mounting seat, the cutting edge of the outer circumferential surface of the blade is on the same cylindrical surface. In the vertical direction of two adjacent blades in the same chip removal groove, the front end of the latter blade is 0.1 to 0.3 mm lower than the end of the former blade.

2. The double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The cutter head is provided with a weight reduction groove.

3. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The blade body has an axial rake angle of -1.2°±1° and a radial clearance angle of -13.7°±5° when mounted on the mounting base.

4. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The blade body has a cutting edge band on the cutting edge.

5. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The blade body is a pressed blade.

6. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The blade body is a ground blade.

7. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The blade surface is coated with a wear-resistant coating.

8. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The cutter head is provided with an internal cooling hole, one end of which is connected to the spindle cooling water channel, and the other end faces the cutter body.

9. A double-sided eight-flute corn milling cutter according to claim 1, characterized in that, The diameter of the cutter head is 63mm.

10. A double-sided eight-flute corn milling cutter according to claim 9, characterized in that, The chip removal grooves are configured as four, spirally distributed along the outer circumference of the cutter head; each chip removal groove has four mounting seats in its direction.

Images