Large-cutting-depth splitting milling cutter

Abstract

A cutting unit on a polygonal blade body comprises a chip discharging groove, a cutting edge, an arc cutting edge, a cutting groove, a front cutter face and a rear cutter face, two opposite side faces intersect with the upper surface and / or the lower surface to form the cutting edge, the chip discharging groove is formed in the side edge close to the cutting edge, and the cutting edge is arranged on the cutting edge close to the cutting edge. A front cutter surface is arranged along the cutting edge, and a rear cutter surface is arranged on the upper surface and / or the lower surface along the cutting edge. The cutting edge is provided with a plurality of cutting grooves, two ends of the cutting edge are respectively provided with an arc cutting edge, and the length of the cutting edge is prolonged. On the basis of adopting the cutting grooves and the chip grooves, the cutting units adopt the structural design of the included angle B of the front cutter face of 10-20 degrees and the rear angle F of the rear cutter face of 3-5 degrees, and the arc cutting edges are adopted at the two ends of the cutting edges, so that the sharpness of the corners of the cutting edges is avoided, the lengths of the cutting edges are prolonged, the strength of the cutting edges is improved, and the service life of the cutting blades is prolonged. The problem that a cutting edge of an existing slitting milling cutter is prone to deformation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutter blades, and more specifically to a large-cutting-depth splitting milling cutter. Background Art

[0002] Milling cutters are cutting tools used in milling machines and processing machines. In the process of processing large workpieces, the milling cutter has a large cutting resistance, which is easy to cause processing vibration and reduce the quality of the workpiece surface. At the same time, the contact area of ​​the milling cutter is large, which increases the cutting resistance. The friction of the tool is easy to heat up, which increases the processing temperature and reduces the service life of the tool itself.

[0003] In order to reduce the problems of high cutting resistance and high processing temperature of the milling cutter, CN202020846746.5 discloses a heavy-duty milling cutter blade with a milling cutter with a rolling groove and a splitting groove to reduce cutting resistance and reduce friction contact area. Specifically, the heavy-duty milling cutter blade includes a blade body, the cross-sectional shape of the blade body is rectangular, and a threaded mounting hole for fixed connection with the cutter disc is provided at the geometric center of the blade body along the thickness direction, and the four circumferential sides of the blade body are respectively provided with milling edges outwardly, and a splitting groove is provided between the milling edges on the sides of the blade body. The surface of the blade body that does not intersect with the axis of the threaded mounting hole is concave inward toward the direction close to the threaded mounting hole to form a rolling groove, and the rolling groove is connected to the splitting groove. The blade disclosed in this patent is provided with a rolling groove, which can make cutting easier, and a splitting groove is also provided, which can make the cutting smoother, the heat dissipation of the tool is faster, the cutting resistance is smaller, the surface finish of the processed surface is significantly improved, and the service life of the tool is significantly improved. The design of the partitioned cutting groove of the milling edge reduces the cutting resistance, but it also reduces the strength of the milling edge. Once the milling cutter encounters a cutting substrate with high hardness or resistance, the milling edge is prone to deformation, curling, or even chipping. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a large cutting depth splitting milling cutter in view of the fact that when the existing milling cutter blade adopts splitting grooves, the strength of the milling edge is reduced, and the milling edge is easily deformed, rolled, or even broken during milling.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A large cutting depth milling cutter comprises a polygonal blade body, a positioning hole is provided at the center of the blade body, a cutting unit on the blade body comprises a cutting groove, a cutting edge, a circular arc cutting edge, a cutting groove, a front cutting face and a back cutting face, the blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, wherein two opposite side surfaces intersect with the upper surface and / or the lower surface to form a cutting edge, a cutting groove is provided on the side adjacent to the cutting edge, and a front cutting face is provided along the cutting edge of the cutting groove, and a back cutting face is provided along the cutting edge of the upper surface and / or the lower surface, the angle B formed by the front cutting face and the cutting groove is in the range of 10° to 20°, and the back angle F formed by the back cutting face and the upper surface or the lower surface is 3° to 5°. A plurality of cutting grooves are provided on the cutting edge, and circular arc cutting edges are provided at both ends of the cutting edge.

[0007] Furthermore, the width W of the chip removal groove is 2 mm to 2.5 mm.

[0008] Furthermore, the chip removal surface of the chip removal groove and the side surface form a chip removal angle E, and the angle is 30° to 45°. Preferably, the chip removal angle E is 35°.

[0009] Furthermore, the included angle B formed by the front cutting surface and the chip removal groove is 15°.

[0010] Furthermore, the cutting groove is a circular arc cutting groove, and the circular arc radius R is 1 mm to 2 mm.

[0011] Furthermore, the back angle A of the partitioning groove is 10° to 15°. Preferably, the back angle A of the partitioning groove is 11°.

[0012] Furthermore, a clearance angle F formed by the flank surface and the upper surface or the lower surface is 3°.

[0013] Furthermore, the arc cutting edge includes a tip arc angle and a process arc angle, the tip arc angle is arranged at the cutting edge of the cutting edge, and the process arc angle is arranged at the end of the cutting edge.

[0014] Furthermore, the arc radius of the tool tip arc angle is 0.4-1.6 mm, and the arc radius of the process arc angle is 0.2-0.4 mm.

[0015] Furthermore, the process arc angle is smaller than the tool tip arc angle. Preferably, the arc radius of the tool tip arc angle is 0.8 mm, and the arc radius of the process arc angle is 0.2 mm.

[0016] Furthermore, the cutting edge is provided with 2 or 3 dividing grooves. Preferably, of the two cutting edges formed on opposite sides, one cutting edge is provided with 3 dividing grooves, and the other cutting edge is provided with 2 dividing grooves, and when cutting, the cutting edge with 3 dividing grooves and the cutting edge with 2 dividing grooves are alternately installed for complementary cutting.

[0017] Furthermore, the blade body is a rhombus-shaped body, wherein an angle between adjacent side edges is 80°, and a chamfer is provided at the top corner of the angle to avoid interference.

[0018] Furthermore, a chamfer is provided in the positioning hole, and the chamfer C is 30° to 45°, which effectively avoids interference during screw assembly.

[0019] Compared with the prior art, the beneficial effects are:

[0020] The utility model discloses a large cutting depth milling cutter with a milling groove and a chip removal groove designed on the milling edge, which can reduce the cutting resistance, make the chip removal smooth, and accelerate the heat dissipation of the tool. At the same time, the utility model adopts a rake face angle B of 10° to 20° and a back face angle F of 3° to 5° at the cutting edge, and adopts arc cutting edges at both ends of the cutting edge, which not only avoids the sharpness of the cutting edge corners, but also extends the length of the cutting edge. Under the premise of ensuring that the milling edge has low cutting resistance, smooth chip removal, and fast heat dissipation, the strength of the cutting edge is improved, the cutting edge is avoided from rolling and breaking during cutting, and the service life of the tool itself is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a large cutting depth milling cutter;

[0022] Figure 2 This is a schematic diagram of the structure of a large cutting depth milling cutter;

[0023] Figure 3 A top view showing the structure of a large cutting depth milling cutter;

[0024] Figure 4 Schematic diagram of the width W of the cutting groove of a large cutting depth milling cutter;

[0025] Figure 5 Schematic diagram of the back angle F of the milling cutter with large cutting depth;

[0026] Figure 6 Schematic diagram of the back angle A of the cutting groove of the large cutting depth milling cutter;

[0027] Figure 7 Schematic diagram of the included angles between the front and rear cutting faces of a large cutting depth milling cutter.

[0028] Among them, 1 is a positioning hole, 2 is a chamfer C, 3 is a row of cutting grooves, 4 is a cutting edge, 5 is an arc cutting edge, 6 is a dividing cutting groove, 7 is a front cutting face, and 8 is a back cutting face. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Example 1

[0034] A large cutting depth splitting milling cutter comprises a quadrilateral blade body, the center of which is provided with a positioning hole 1. The blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, and a cutting unit is provided on the blade body, and the cutting unit comprises a cutting groove 3, a cutting edge 4, an arc cutting edge 5, a splitting groove 6, a front cutting face 7 and a back cutting face 8.

[0035] Two opposite side surfaces intersect with the upper surface to form two cutting edges 4, and the side surface connected to the cutting edge 4 is provided with a chip removal groove 3. The cutting edge 4 is provided with a rake face 7 extending along the side toward the chip removal groove, and the angle B formed by the rake face 7 and the chip removal surface where the chip removal groove is located is in the range of 10° to 20°. The cutting edge 4 is provided with a back face 8 extending along the upper surface toward the positioning hole 1, and the back angle F formed by the back face 8 and the upper surface or the lower surface is 3° to 5°. The two cutting edges 4 are provided with a plurality of dividing chip grooves 6, and arc cutting edges 5 are provided at both ends of the cutting edge 4.

[0036] Example 2

[0037] A large cutting depth splitting milling cutter comprises a quadrilateral blade body, the center of which is provided with a positioning hole 1. The blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, and a cutting unit is provided on the blade body, and the cutting unit comprises a cutting groove 3, a cutting edge 4, an arc cutting edge 5, a splitting groove 6, a front cutting face 7 and a back cutting face 8.

[0038] Two opposite side surfaces intersect with the upper surface to form two cutting edges 4. The side surface connected to the cutting edge 4 is provided with a chip removal groove 3. The width W of the chip removal groove 3 is 2mm to 2.5mm. The chip removal surface of the chip removal groove 3 forms a chip removal angle E with the side surface, and the angle is 30° to 45°. The cutting edge 4 is provided with a front cutting face 7 extending along the side surface toward the chip removal groove. The angle B formed by the front cutting face 7 and the chip removal groove is in the range of 10° to 20°. The cutting edge 4 is provided with a back cutting face 8 extending along the upper surface toward the positioning hole 1. The back angle F formed by the back cutting face 8 and the upper surface or the lower surface is 3° to 5°. The two cutting edges 4 are provided with a plurality of chip dividing grooves 6, and arc cutting edges 5 are provided at both ends of the cutting edge 4.

[0039] Example 3

[0040] A large cutting depth splitting milling cutter comprises a quadrilateral blade body, the center of which is provided with a positioning hole 1. The blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, and a cutting unit is provided on the blade body, and the cutting unit comprises a cutting groove 3, a cutting edge 4, an arc cutting edge 5, a splitting groove 6, a front cutting face 7 and a back cutting face 8.

[0041] Two opposite side surfaces intersect with the upper surface to form two cutting edges 4. The side surface connected to the cutting edge 4 is provided with a chip removal groove 3. The width W of the chip removal groove 3 is 2mm to 2.5mm. The chip removal surface of the chip removal groove 3 forms a chip removal angle E with the side surface, and the angle is 30° to 45°. The cutting edge 4 is provided with a front cutting face 7 extending along the side surface toward the chip removal surface. The angle B formed by the front cutting face 7 and the chip removal groove is in the range of 10° to 20°. The cutting edge 4 is provided with a back cutting face 8 extending along the upper surface toward the positioning hole 1. The back angle F formed by the back cutting face 8 and the upper surface or the lower surface is 3° to 5°. The two cutting edges 4 are provided with two or three circular arc cutting grooves 6. The arc radius R is 1mm to 2mm, and the back angle A of the cutting groove 6 is 10° to 15°. Circular arc cutting edges 5 are provided at both ends of the cutting edge 4.

[0042] Example 4

[0043] A large cutting depth splitting milling cutter comprises a quadrilateral blade body, the center of which is provided with a positioning hole 1. The blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, and a cutting unit is provided on the blade body, and the cutting unit comprises a cutting groove 3, a cutting edge 4, an arc cutting edge 5, a splitting groove 6, a front cutting face 7 and a back cutting face 8.

[0044] Two opposite side surfaces intersect with the upper surface to form two cutting edges 4, and the side surface connected to the cutting edge 4 is provided with a chip removal groove 3, the width W of the chip removal groove 3 is 2mm to 2.5mm, and the chip removal surface of the chip removal groove 3 forms a chip removal angle E with the side surface, and the angle is 30° to 45°. The cutting edge 4 is provided with a front cutting face 7 extending along the side surface toward the chip removal surface, and the angle B formed by the front cutting face 7 and the chip removal groove is in the range of 10° to 20°. The cutting edge 4 is provided with a back cutting face 8 extending along the upper surface toward the positioning hole 1, and the back angle F formed by the back cutting face 8 and the upper surface or the lower surface is 3° to 5°. The two cutting edges 4 are provided with two or three circular arc dividing grooves 6, and the arc radius R is 1mm to 2mm, and the back angle A of the dividing groove 6 is 10° to 15°. Arc cutting edges 5 are respectively provided at both ends of the cutting edge 4 . The arc cutting edge 5 includes a tip arc angle and a process arc angle. The tip arc angle is provided at the cutting edge of the cutting edge 4 , and the process arc angle is provided at the end of the cutting edge 4 .

[0045] Example 5

[0046] A large cutting depth milling cutter includes a rhombus-shaped blade body, wherein the angle between adjacent sides of the rhombus is 80°, and a chamfer is provided at the vertex of the angle to avoid interference. A positioning hole 1 is provided at the center of the blade body, and a chamfer is provided in the positioning hole 1, wherein the chamfer C2 is 30° to 45°, which effectively avoids interference during screw assembly.

[0047] The blade body includes an upper surface, a lower surface, and four side surfaces connecting the upper surface and the lower surface. The blade body is provided with a cutting unit, which includes a chip removal groove 3, a cutting edge 4, an arc cutting edge 5, a dividing chip groove 6, a front cutting face 7, and a back cutting face 8. Two opposite side surfaces intersect with the upper surface to form two cutting edges 4, and the other two opposite side surfaces intersect with the lower surface to form another two cutting edges 4. The side surface connected to the cutting edge 4 is provided with a chip removal groove 3, the width W of the chip removal groove 3 is 2mm to 2.5mm, and the chip removal surface of the chip removal groove 3 forms a chip removal angle E with the side surface, and the angle is 30° to 45°. The cutting edge 4 is provided with a front cutting face 7 extending along the side surface toward the chip removal surface, and the angle range of the angle B formed by the front cutting face 7 and the chip removal groove is 10° to 20°. The cutting edge 4 is provided with a back cutting face 8 extending along the upper surface or the lower surface toward the positioning hole 1, and the back angle F formed by the back cutting face 8 and the upper surface or the lower surface is 3° to 5°. On the two cutting edges 4 on the upper surface or the lower surface, in the two cutting edges 4 formed on the opposite sides, one of the cutting edges 4 is provided with three dividing grooves 6, and the other cutting edge 4 is provided with two dividing grooves 6, the arc radius R of the dividing groove 6 is 1mm-2mm, and the back angle A of the dividing groove 6 is 10°-15°. When cutting, the cutting edge 4 with three dividing grooves 6 and the cutting edge 4 with two dividing grooves 6 are alternately installed for complementary cutting. The two ends of the cutting edge 4 are respectively provided with arc cutting edges 5, and the arc cutting edges 5 include a tip arc angle and a process arc angle. The tip arc angle is set at the cutting edge of the cutting edge 4, and the process arc angle is set at the end of the cutting edge 4. The arc radius of the tip arc angle is 0.4-1.6mm, and the arc radius of the process arc angle is 0.2-0.4mm.

[0048] Example 6

[0049] A large cutting depth milling cutter includes a rhombus-shaped blade body, wherein the angle between adjacent sides of the rhombus is 80°, and a chamfer is provided at the vertex of the angle to avoid interference. A positioning hole 1 is provided at the center of the blade body, and a chamfer is provided in the positioning hole 1, wherein the chamfer C2 is 30° to 45°, which effectively avoids interference during screw assembly.

[0050] The blade body includes an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface. The blade body is provided with a cutting unit, which includes a chip removal groove 3, a cutting edge 4, an arc cutting edge 5, a dividing chip groove 6, a front cutting face 7 and a back cutting face 8. Two opposite side surfaces intersect with the upper surface to form two cutting edges 4, and the other two opposite side surfaces intersect with the lower surface to form another two cutting edges 4. The side surface connected to the cutting edge 4 is provided with a chip removal groove 3, the width W of the chip removal groove 3 is 2mm to 2.5mm, and the chip removal surface of the chip removal groove 3 forms a chip removal angle E with the side surface, and the angle is 35°. The cutting edge 4 is provided with a front cutting face 7 extending along the side surface toward the chip removal surface, and the angle range of the angle B formed by the front cutting face 7 and the chip removal groove is 15°. The cutting edge 4 is provided with a back cutting face 8 extending along the upper surface or the lower surface toward the positioning hole 1, and the back angle F formed by the back cutting face 8 and the upper surface or the lower surface is 3°. On the two cutting edges 4 on the upper surface or the lower surface, in the two cutting edges 4 formed on the opposite sides, one of the cutting edges 4 is provided with three dividing grooves 6, and the other cutting edge 4 is provided with two dividing grooves 6, the arc radius R of the dividing groove 6 is 1mm-2mm, and the back angle A of the dividing groove 6 is 11°. When cutting, the cutting edge 4 with three dividing grooves 6 and the cutting edge 4 with two dividing grooves 6 are alternately installed for complementary cutting. The two ends of the cutting edge 4 are respectively provided with arc cutting edges 5, and the arc cutting edge 5 includes a tip arc angle and a process arc angle. The tip arc angle is set at the cutting edge of the cutting edge 4, and the process arc angle is set at the end of the cutting edge 4. The arc radius of the tip arc angle is 0.8mm, and the arc radius of the process arc angle is 0.2mm.

[0051] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A large cutting depth milling cutter, characterized in that: It comprises a polygonal blade body, the center of which is provided with a positioning hole, and the cutting unit on the blade body comprises a cutting groove, a cutting edge, an arc cutting edge, a dividing cutting groove, a front cutting face and a back cutting face; the blade body comprises an upper surface, a lower surface and four side surfaces connecting the upper surface and the lower surface, wherein two opposite side surfaces intersect with the upper surface and / or the lower surface to form a cutting edge, a cutting groove is provided on the side adjacent to the cutting edge, and a front cutting face is provided along the cutting edge, and a back cutting face is provided along the cutting edge of the upper surface and / or the lower surface, the angle B formed by the front cutting face and the cutting groove is in the range of 10° to 20°, and the back angle F formed by the back cutting face and the upper surface or the lower surface is 3° to 5°; a plurality of dividing cutting grooves are provided on the cutting edge, and arc cutting edges are provided at both ends of the cutting edge.

2. The large cutting depth sub-milling cutter according to claim 1, characterized in that: The width W of the chip removal groove is 2 mm to 2.5 mm.

3. The large cutting depth sub-milling cutter according to claim 1 or 2, characterized in that: The chip removal surface and the side surface of the chip removal groove form a chip removal angle E, and the angle is 30° to 45°.

4. The large cutting depth sub-milling cutter according to claim 1, characterized in that: The angle B formed by the front cutting surface and the cutting groove is in the range of 15°, and the back angle F formed by the back cutting surface and the upper surface or the lower surface is 3°.

5. The large cutting depth sub-milling cutter according to claim 1, characterized in that: The cutting groove is a circular arc cutting groove, and the arc radius R is 1 mm to 2 mm.

6. The deep cutting milling cutter according to claim 1 or 5, characterized in that: The back angle A of the cutting groove is 10° to 15°.

7. The large cutting depth sub-milling cutter according to claim 1, characterized in that: The arc cutting edge has a tip arc angle and a process arc angle, wherein the tip arc angle is arranged at the cutting edge of the cutting edge, and the process arc angle is arranged at the end of the cutting edge.

8. The deep cutting milling cutter according to claim 7, characterized in that: The arc radius of the tool tip arc angle is 0.4-1.6 mm, and the arc radius of the process arc angle is 0.2-0.4 mm.

9. The large cutting depth sub-milling cutter according to claim 1, characterized in that: The cutting edge is provided with two or three cutting grooves.

10. The deep-cutting milling cutter according to claim 1, characterized in that: The blade body is a rhombus-shaped body, wherein the angle between adjacent sides is 80°.

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