A solid carbide milling cutter

Abstract

The present application provides a solid carbide milling cutter, characterized in that a secondary chip groove is provided on the front cutting edge of the peripheral blade, the secondary chip groove has a groove surface close to the peripheral blade edge, which is a second front angle surface, so that the groove surface of the secondary chip groove close to the peripheral blade edge forms a second front angle of the peripheral blade, the second front angle of the peripheral blade is greater than the corresponding first front angle of the peripheral blade, and one or more reinforcement parts are provided in the secondary chip groove, the reinforcement part is a reinforcement rib or a protrusion provided on the groove surface away from the peripheral blade edge, so that the secondary chip groove has multiple groove sections, wherein the width of the reinforcement part is 0.1mm to 5mm. The technical solution of the present application can improve the sharpness of the milling cutter edge, reduce the cutting force, and improve the cutting performance from multiple aspects such as enhancing the wear resistance of the edge, effectively cooling the tool and chips, and effectively controlling the chip size.

Description

Technical Field

[0001] The invention relates to the technical field of milling cutters, and in particular to an integral carbide milling cutter comprising a secondary chip groove. Background Art

[0002] A milling cutter is a widely used multi-tooth, multi-blade rotary tool. During milling, the milling cutter rotates around its axis as the main motion, and the workpiece performs feed motion. Milling cutters are usually used for high-speed cutting, so they are subject to large impact and vibration during processing. Since a milling cutter is a multi-blade tool, the milling speed is high and there is no idle travel, so it is an efficient cutting method that can not only process planes, grooves, steps, but also threads, splines, gears and other formed surfaces. The milling cutters in the prior art have problems such as poor processing accuracy, low cutting efficiency, and short service life, and cannot meet the needs of the industry. In particular, for difficult-to-process materials such as titanium alloys, nickel-based alloys, stainless steel, and polymer materials, it is difficult to achieve high-efficiency processing due to factors such as cutting force and cutting heat, which limits production efficiency and becomes an industry problem. Summary of the invention

[0003] The present invention provides a solid carbide milling cutter including a secondary chip groove, which includes the following embodiments:

[0004] Embodiment 1. A solid carbide milling cutter, comprising a main body portion, an optional shank portion for direct or indirect connection with a machine tool, and an optional neck portion connecting the main body portion and the shank portion, wherein the main body portion is made of solid carbide, the main body portion has a plurality of peripheral cutting edges and a plurality of main chip grooves corresponding to the peripheral cutting edges, the peripheral cutting edges each independently having a peripheral blade rake face, a peripheral blade flank face and a peripheral blade edge, wherein the peripheral blade rake face forms a peripheral blade first rake angle at each location of the peripheral blade edge, characterized in that a secondary chip groove is provided on the peripheral blade rake face, the secondary chip groove extends in the length direction along the direction of the peripheral blade edge, and the secondary chip groove has a peripheral blade edge close to the peripheral blade edge. The groove surface of the peripheral cutting edge and the groove surface away from the peripheral cutting edge, the groove surface close to the peripheral cutting edge is a second rake angle surface, so that the groove surface of the secondary chip groove close to the peripheral cutting edge forms a peripheral cutting edge second rake angle, the peripheral cutting edge second rake angle is greater than the corresponding peripheral cutting edge first rake angle, and one or more reinforcement parts are provided in the secondary chip groove, the reinforcement part is a reinforcement rib or a protrusion provided on the groove surface away from the peripheral cutting edge, the protrusion makes the cross-sectional area of ​​the secondary chip groove at the protrusion reduce by more than 30%, so that the secondary chip groove has a plurality of groove segments, wherein the width of the reinforcement part is 0.1mm to 5mm, 0.2mm to 4mm, or 0.3mm to 3mm. Alternatively, the secondary chip groove has a plurality of groove segments, wherein the spacing between two adjacent groove segments is 0.1mm to 5mm, 0.2mm to 4mm, or 0.3mm to 3mm. In some embodiments, the length of each groove segment is 2 to 15 times or 3 to 12 times the spacing. In some embodiments, the second rake angle of the peripheral blade is at least 3°, at least 5°, at least 10°, at least 20°, at least 25°, at least 30° or at least 35° greater than the corresponding first rake angle of the peripheral blade.

[0005] Embodiment 2. The solid carbide milling cutter according to embodiment 1 is characterized in that the second rake angle of the peripheral blade is 3 degrees to 45 degrees larger than the first rake angle of the peripheral blade, for example, 5 degrees to 35 degrees.

[0006] Embodiment 3. The integral carbide milling cutter according to embodiment 1 is characterized in that the main chip groove is a spiral groove, the angle of the spiral groove is the angle between the direction of the spiral and the spindle of the milling cutter, and the angle of the spiral groove is between 3 and 55 degrees, such as 15 to 50 degrees, such as 25 to 45 degrees.

[0007] Embodiment 4. The solid carbide milling cutter according to embodiment 2 is characterized in that the width of the reinforcement portion is 0.5 mm to 2.0 mm, and the length of each slot segment is 2 to 15 times or 3 to 12 times the width. In other words, the spacing between two adjacent slot segments is 0.5 mm to 2.0 mm, and the length of each slot segment is 2 to 15 times or 3 to 12 times the spacing.

[0008] Embodiment 5. The solid carbide milling cutter according to embodiment 1 is characterized in that the width of the secondary chip groove is 0.15 mm to 3 mm or 3% to 30% of the diameter of the main body part.

[0009] Embodiment 6. The solid carbide milling cutter according to embodiment 1 is characterized in that the depth of the secondary chip groove is 0.1 to 2 mm, or 0.3 to 1.5 mm.

[0010] Embodiment 7. The solid carbide milling cutter according to embodiment 1 is characterized in that the diameter of the main body portion is 1 mm to 50 mm, for example, 5 mm to 40 mm, 6 mm to 25 mm.

[0011] Embodiment 8. The solid carbide milling cutter according to embodiment 6 is characterized in that the depth of the secondary chip groove is 0.2 to 0.8 times, for example, 0.3 to 0.6 times, the width of the secondary chip groove.

[0012] Embodiment 9. The integral carbide milling cutter according to embodiment 1 is characterized in that the bottom surface of the milling cutter has a plurality of bottom cutting edges, each of which independently has a bottom cutting edge rake face, a bottom cutting edge flank face and a bottom cutting edge, the bottom cutting edge is arranged corresponding to the peripheral cutting edge, the connection between the bottom cutting edge and the peripheral cutting edge is a tool tip, a tool tip chip breaker groove is arranged at the position of the tool tip, and the tool tip is optionally arc-shaped or circularly chamfered. In this application, the term "tool tip" may also be referred to as a transition edge, and the tool tip chip breaker groove may also be referred to as a transition edge chip breaker groove.

[0013] Embodiment 10. According to the integral carbide milling cutter described in Embodiment 1, it is characterized in that the distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.005mm and less than or equal to 0.2mm, greater than or equal to 0.006mm and less than or equal to 0.15mm, greater than or equal to 0.01mm and less than or equal to 0.18mm, greater than or equal to 0.02mm and less than or equal to 0.17mm, greater than or equal to 0.008mm and less than or equal to 0.1mm, greater than or equal to 0.009mm and less than or equal to 0.09mm, greater than or equal to 0.01mm and less than or equal to 0.015mm.

[0014] Embodiment 11. The integral carbide milling cutter according to embodiment 1 is characterized in that the milling cutter is one of the following: an end mill, a ball head milling cutter, a taper milling cutter, a ball head taper milling cutter, a drum milling cutter, and a bull nose milling cutter.

[0015] Embodiment 12. According to the integral carbide milling cutter described in Embodiment 1, it is characterized in that the secondary chip groove also includes a third rake angle surface adjacent to the second rake angle surface, the third rake angle surface forms a third rake angle of the peripheral blade, and the third rake angle of the peripheral blade is greater than the corresponding second rake angle of the peripheral blade.

[0016] The present application significantly improves the sharpness of the peripheral blade edge and effectively reduces the cutting resistance by providing a secondary chip groove on the front cutting edge of the peripheral blade and forming a secondary front angle of the peripheral blade that is larger than the corresponding first front angle of the peripheral blade. The present application stipulates that one or more reinforcement parts are provided in the secondary chip groove, and the width of the reinforcement part is 0.1mm to 5mm, or 0.3mm to 3mm. The reinforcement part can play a good role in chip breaking and chip separation, so as to effectively control the length of the chips, reduce the chip size, improve the chip removal efficiency, reduce the friction and extrusion force between the chips and the workpiece, and thus significantly improve the surface finish of the product. The design of the reinforcement part enhances the strength of the milling cutter edge, reduces the occurrence of chipping, and effectively improves the processing life of the milling cutter. In addition, the setting of the auxiliary chip groove increases the carrying space of the cutting fluid, the reinforcement part enhances the turbulence of the cutting fluid, improves the cooling efficiency, and achieves sufficient cooling effect on the tool edge and chips. This innovative invention successfully suppresses the heat generated during the cutting process, thereby significantly improving the feed speed and processing efficiency, reducing tool wear, and greatly extending the service life of the tool. This improvement successfully solves the problem of excessive temperature in metal cutting, especially solves the industry problem of difficult processing of high-temperature alloy materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not limitations of the present disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure of the solid carbide milling cutter of Example 1 of the present application;

[0019] Figure 2 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 1 of the present application;

[0020] Figure 3 It is a partial schematic diagram of the main body of the solid carbide milling cutter of Example 1 of the present application;

[0021] Figure 4This is a schematic diagram of a solid carbide milling cutter cutting a workpiece in Example 1 of the present application;

[0022] Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle A part;

[0023] Figure 6 A schematic diagram of a milling cutter provided with a secondary chip groove for cutting a workpiece in the present application;

[0024] Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle B part;

[0025] Figure 8 A schematic diagram of a workpiece being cut by a milling cutter without auxiliary chip grooves;

[0026] Fig. 9 for Figure 8 A partial enlarged schematic diagram of the middle C part;

[0027] Fig.10 A schematic diagram of a solid carbide milling cutter according to Embodiment 2 of the present application providing a secondary chip groove and providing a third rake angle surface to form a third rake angle of a peripheral cutting edge;

[0028] Fig.11 This is a schematic diagram of the overall structure of the solid carbide milling cutter of Example 4 of the present application;

[0029] Fig.12 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 4 of the present application;

[0030] Fig.13 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 4 of the present application;

[0031] Fig.14 This is a schematic diagram of the overall structure of the solid carbide milling cutter of Example 5 of the present application;

[0032] Fig.15 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 5 of the present application;

[0033] Fig.16 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 5 of the present application;

[0034] Fig.17 This is a schematic diagram of the overall structure of the solid carbide milling cutter of Example 6 of the present application;

[0035] Fig.18 This is a schematic structural diagram of the body portion of the solid carbide milling cutter of Example 6 of the present application;

[0036] Fig.19This is a partial schematic diagram of a reinforcement portion provided in a secondary chip groove in Example 6 of the present application;

[0037] Fig. 20 This is a partial enlarged view of the wear on the milling cutter edge.

[0038] Description of the drawings: 100-main body part, 110-peripheral cutting edge, 111-peripheral blade front cutting edge, 112-peripheral blade back cutting edge, 113-peripheral blade edge, 120-main chip groove, 10-secondary chip groove, 11-groove surface close to the peripheral blade edge (second front angle surface), 12-third front angle surface, 13-groove surface away from the peripheral blade edge, 14-protrusion, 20-peripheral blade reinforcement rib, 130-bottom cutting edge, 131-bottom cutting edge, 132-bottom blade back cutting edge, 133-bottom blade edge, 140-tool tip, 30-tool tip chip breaker, 200-tool neck part, 300-tool handle part, 400-feed per tooth. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] The present application discloses an integral carbide milling cutter, which comprises a main body part, an optional shank part for direct or indirect connection with a machine tool, and an optional neck part for connecting the main body part and the shank part, wherein the main body part is made of integral carbide, the main body part has a plurality of peripheral cutting edges and a plurality of main chip grooves corresponding to the peripheral cutting edges, the peripheral cutting edges each independently have a peripheral blade rake face, a peripheral blade flank face and a peripheral blade edge, wherein the peripheral blade rake face forms a peripheral blade first rake angle at each location of the peripheral blade edge, and is characterized in that a secondary chip groove is provided on the peripheral blade rake face, the secondary chip groove extends in the length direction along the direction of the peripheral blade edge, and the secondary chip groove has a groove face close to the peripheral blade edge and a groove face away from the peripheral blade edge The groove surface of the peripheral cutting edge is a second rake angle surface, so that the groove surface of the secondary chip groove near the peripheral cutting edge forms a peripheral cutting edge second rake angle, the peripheral cutting edge second rake angle is greater than the corresponding peripheral cutting edge first rake angle, and one or more reinforcement parts are provided in the secondary chip groove, the reinforcement part is a reinforcement rib or a protrusion provided on the groove surface away from the peripheral cutting edge, the protrusion makes the cross-sectional area of ​​the secondary chip groove at the protrusion reduce by more than 30%, so that the secondary chip groove has a plurality of groove segments, wherein the width of the reinforcement part is 0.1mm to 5mm, 0.2mm to 4mm, 0.4mm to 2.5mm, 0.5mm to 2mm or 0.3mm to 3mm, or other combinations of these end points. In other words, the secondary chip groove has a plurality of groove segments, wherein the spacing between two adjacent groove segments is 0.1mm to 5mm, or 0.3mm to 3mm. In some embodiments, the length of each groove segment is 2 to 15 times or 3 to 12 times the spacing. During preparation, the reinforcing portion is formed by retaining the original material in the process of forming the secondary chip groove. The shape of the reinforcing portion is not particularly limited, and can adopt a shape commonly known to those skilled in the art, as long as it can play a role in chip breaking and chip separation. Its shape can be a protrusion formed in the secondary chip groove, or a partition spanning the entire secondary chip groove, that is, a reinforcing rib, also called a peripheral edge reinforcing rib.

[0041] The present application defines that "the reinforcing portion is a reinforcing rib or a protrusion arranged on the groove surface away from the peripheral cutting edge, and the protrusion reduces the cross-sectional area of ​​the secondary chip groove by more than 30%". The protrusion is located on the groove surface away from the peripheral cutting edge. After the chips enter the secondary chip groove, the protrusion can produce chip breaking or chip splitting effects, thereby effectively controlling the length of the chips, reducing the chip size, and improving the chip removal efficiency. In the present application, the cross-sectional area of ​​the secondary chip groove refers to the cross-sectional area of ​​the secondary chip groove perpendicular to the extension direction. After the protrusion is set, the cross-sectional area of ​​the secondary chip groove at the protrusion is reduced relative to the secondary chip groove without the protrusion. The larger the protrusion size, the more the cross-sectional area of ​​the secondary chip groove at the protrusion is reduced. When the protrusion arranged on the groove surface away from the peripheral cutting edge reduces the cross-sectional area of ​​the secondary chip groove by more than 30% relative to the secondary chip groove without the protrusion, for example, by more than 40%, for example, by more than 50%, the protrusion can play a good chip breaking or chip separation role, effectively reduce the chip size, and facilitate the timely discharge of chips. The protrusion can also enhance the turbulence of the cutting fluid and inhibit the accumulation of heat during the cutting process.

[0042] In the present application, the total length of the secondary chip groove can be more than 60% of the length of the peripheral blade edge, for example, more than 70% of the length of the peripheral blade edge, more than 80% of the length of the peripheral blade edge, or more than 85% of the length of the peripheral blade edge. In some embodiments, the second rake angle of the peripheral blade is at least 3°, at least 5°, at least 10°, at least 20°, at least 25°, at least 30° or at least 35° greater than the corresponding first rake angle of the peripheral blade. In some embodiments, the spacing between two adjacent groove segments is 0.4mm to 2.8mm, or 0.5mm to 2.5mm.

[0043] The terms in this application have the meanings generally understood by those skilled in the art. For example, the term "circumferential blade rake face" refers to the surface on the peripheral cutting edge over which chips flow, the term "circumferential blade flank face" refers to the surface on the peripheral cutting edge opposite to the surface produced during cutting on the workpiece, and the term "circumferential blade edge" is the intersection of the peripheral blade flank face and the peripheral blade rake face, which is the sharp part on the peripheral blade that mainly plays a cutting role.

[0044] The term "circumferential blade first rake angle" in this application has the same meaning as the general term "rake angle" in the field, and the two can be used interchangeably. This application uses "circumferential blade first rake angle" only for the convenience of distinction. The term "circumferential blade second rake angle" in this application refers to the angle formed by the second rake angle surface in the "circumferential blade first rake angle" measurement plane. That is, the "circumferential blade first rake angle" is formed by the circumferential blade front cutting face, and the "circumferential blade second rake angle" is formed by the groove surface of the secondary chip groove close to the circumferential blade edge. For a specific selected point on the circumferential blade edge, the circumferential blade first rake angle and the circumferential blade second rake angle exist at the same time. At this time, the circumferential blade first rake angle is the corresponding circumferential blade first rake angle of the circumferential blade second rake angle of the selected point on the edge.

[0045] The terms "width of the reinforcement portion", "spacing", and "spacing between two adjacent slot segments" in this application have the same meaning, and refer to the distance between two adjacent slot segments separated by the reinforcement portion. When the reinforcement portion is a reinforcing rib, the distance is the width of the reinforcing rib. When the reinforcement portion is a protrusion disposed on the slot surface away from the peripheral cutting edge, the distance is the width of the area where the protrusion reduces the cross-sectional area of ​​the secondary chip groove by more than 30%. "Length of the slot segment" refers to the dimension of the slot segment extending in the direction of the peripheral cutting edge.

[0046] The term "hard alloy" in this application has the usual meaning understood by those skilled in the art. In this field, hard alloy is a powder metallurgy product made of micron-sized powder of carbide (WC, TiC) of high-hardness refractory metal as the main component, cobalt (Co) or nickel (Ni), molybdenum (Mo) as a binder, and sintered in a vacuum furnace or a hydrogen reduction furnace. Its toughness is much higher than that of high-speed steel, about 800-1000°C, and the allowed cutting speed is about 4-10 times that of high-speed steel. The hardness is very high, reaching (89-91) HRA, and some are as high as 93HRA; but its bending strength is 1.1-1.5GPa, which is only half of that of high-speed steel; the impact toughness is 0.04MJ / m 2 About, less than 1 / 25 to 1 / 10 of high-speed steel. Due to its good heat resistance and wear resistance, it is increasingly used in cutting tools with less complicated blade shapes. The cemented carbide described in the present application includes one selected from the following: for example, tungsten-cobalt (WC-Co) cemented carbide, tungsten-titanium-cobalt (WC-Ti-Co) cemented carbide, tungsten-titanium-tantalum (niobium) (WC-TaC (NbC)-Co) cemented carbide, tungsten-titanium-cobalt-tantalum (niobium) (WC-Ti C-TaC (NbC)-Co) cemented carbide and other WC-based cemented carbide, or TiC-based cemented carbide, ultrafine grain cemented carbide, steel-bonded cemented carbide, coated cemented carbide, etc.

[0047] The present application significantly improves the sharpness of the peripheral blade edge and effectively reduces the cutting resistance by arranging a secondary chip groove on the peripheral blade rake face and forming a peripheral blade second rake angle that is greater than the corresponding peripheral blade first rake angle.

[0048] The secondary chip groove described in the present application is provided with one or more reinforcement parts, so that the secondary chip groove has multiple groove sections. The present application limits the width of the reinforcement part to 0.1mm to 5mm, or 0.3mm to 3mm. The reinforcement part can play a good role in chip breaking and chip separation, thereby effectively controlling the length of the chips, reducing the chip size, improving the chip removal efficiency, and reducing the friction and extrusion force between the chips and the workpiece, thereby significantly improving the surface finish of the product. The width of the reinforcement part described in the present application refers to the size of the reinforcement part in the length direction of the secondary chip groove.

[0049] The design of the reinforcement part in the present application enhances the strength of the cutting edge of the milling cutter, reduces the occurrence of chipping, effectively improves the processing life of the milling cutter, and can set a sharper front angle in the cutting edge area where no reinforcement ribs are set without reducing the overall strength of the cutting edge.

[0050] The technical solution of the present application can effectively suppress the accumulation of heat during the cutting process. The chip breaking and splitting functions of the reinforcement part enable the chips to be discharged smoothly to take away the heat. In addition, the contact area between the peripheral cutting edge area of ​​the auxiliary chip groove and the workpiece surface of the present application is much smaller than that of the cutting edge without the auxiliary chip groove, which reduces the friction area. The present application suppresses the accumulation of heat during the cutting process and also increases the carrying space of the cutting fluid due to the setting of the auxiliary chip groove, thereby achieving a better cooling effect. Furthermore, without being limited by theory, the reinforcement part enhances the turbulence of the cutting fluid, increases the contact area and contact time of the cutting fluid, which also plays a role in improving the cooling effect and achieves sufficient cooling of the tool edge and chips. This innovative invention successfully suppresses the accumulation of heat during the cutting process, thereby significantly improving the processing efficiency and greatly extending the service life of the tool. This improvement successfully solves the problem of excessive temperature in metal cutting, especially the industry problem of difficult processing of high-temperature alloy materials. Practice shows that the milling cutter with the secondary chip groove of the present application has a cutting speed of more than 90m / min for titanium alloy, while the prior art usually has only 60-70m / min, and the cutting speed of nickel-based alloy is more than 60m / min, while the prior art usually has only 45-50m / min. The reduction of chip heat accumulation effectively inhibits the generation of crescent wear on the rake face, increases the feed speed, and achieves high-efficiency processing.

[0051] The cutting fluid described in this application is also called coolant, which refers to a liquid that lowers the cutting temperature and reduces tool wear during the metal cutting process. Common cutting fluids include oily cutting fluids and water-based cutting fluids.

[0052] The high-temperature alloy described in this application is also called heat-resistant alloy. In the prior art, the reasons why high-temperature alloy materials are difficult to cut are as follows: 1. High temperature strength and high tendency to work hardening. During cutting, the plastic deformation resistance is large, the cutting load is heavy, and the cutting temperature is high. The unit cutting force of general nickel-based high-temperature alloys is 50% higher than that of medium carbon steel; the work hardening and residual stress of the surface layer after processing are large, and the degree of hardening can reach 200% to 500%; the wear of the tip and the edge is extremely serious, and the groove wear of the secondary back face is also very easy to occur. 2. Poor thermal conductivity. The thermal conductivity coefficient is about 1 / 5 to 1 / 2 of 45 steel, so the cutting temperature is high. Studies have shown that when processing heat-resistant alloys, about 40% of the heat accumulates in the tool edge area, about 40% of the heat accumulates on the chips, and about 20% accumulates on the cutting material, which easily causes the material to harden. 3. The tendency to bond with the tool is large. It is very easy to produce built-up edge, affecting the quality of the processed surface. 4. High content of strengthening elements. A large number of highly abrasive metal carbides, intermetallic compounds and other hard points are formed in the alloy, which have a strong abrasive effect on the tool. The wear of the tool surface and the workpiece or cutting surface greatly affects the tool life, processing efficiency and processing accuracy. For example, the "cold welding" phenomenon produced by the tool and the workpiece material under sufficiently large pressure and high temperature is the result of adsorption between the fresh surface atoms of the friction surface. The bonding points of the two friction surfaces will be torn and taken away by the other side due to relative movement. If the rupture of the bonding points occurs on the tool side, it causes tool wear. Cutting temperature is the main factor affecting bonding wear. The higher the cutting temperature, the more severe the bonding wear.

[0053] The technical solution of this application can improve the sharpness of the milling cutter edge, reduce cutting force, and enhance the wear resistance of the cutting edge. In particular, this application improves the cooling efficiency through the interval arrangement of the auxiliary chip groove and the reinforcing ribs or protrusions, effectively cools the tool and chips, and effectively controls the chip size to improve the chip removal efficiency, successfully suppresses the heat generated during the cutting process, improves the cutting performance from multiple aspects, improves the processing efficiency, and improves the surface quality of the product. It provides a reliable solution for the processing of high-temperature alloy materials.

[0054] In some embodiments, the second rake angle of the peripheral blade is 3 to 45 degrees greater than the first rake angle of the peripheral blade, such as 5 to 35 degrees, such as 6 to 30 degrees, such as 8 to 25 degrees, such as 10 to 20 degrees. Those skilled in the art can adjust the second rake angle of the peripheral blade as needed to achieve the effect of a sharp edge. Generally, the smaller the first rake angle of the peripheral blade at a certain peripheral blade edge, the greater the change in the second rake angle of the peripheral blade formed by setting the secondary chip groove relative to the first rake angle can be.

[0055] In some embodiments, the main chip groove is a spiral groove, the angle of the spiral groove is the angle between the spiral direction and the milling cutter spindle, and the angle of the spiral groove is between 3 and 55 degrees, such as 15 to 50 degrees, such as 25 to 45 degrees.

[0056] In some embodiments, the width of the reinforcement portion is 0.5 mm to 2.0 mm, and the length of each slot segment is 2 to 15 times or 3 to 12 times the width. Or the spacing between two adjacent slot segments is 0.5 mm to 2.0 mm, and the length of each slot segment is 2 to 15 times or 3 to 12 times the spacing. Appropriate spacing and slot segment length settings can further improve chip cutting efficiency, and the feed per tooth can be increased to 1.5 to 3 times that of the prior art, thereby achieving high-efficiency processing.

[0057] In some embodiments, the width of the secondary chip groove is 0.15 mm to 3 mm or 3% to 30% of the diameter of the body portion. In the present application, the "width of the secondary chip groove" refers to the dimension of the secondary chip groove on the peripheral edge rake surface perpendicular to the peripheral edge edge direction.

[0058] In some embodiments, the depth of the secondary chip groove is 0.1 to 2 mm, or 0.3 to 1.5 mm. In the present application, the "depth of the secondary chip groove" refers to the maximum depth from the bottom of the secondary chip groove to the rake face of the peripheral edge. It should be understood by those skilled in the art that there is no particular limitation on the depth of the secondary chip groove. If it is too deep, it is difficult to process, and if it is too shallow, it cannot significantly increase the rake angle.

[0059] In some embodiments, the diameter of the body portion is 1 mm to 50 mm, for example, 5 mm to 40 mm, 6 mm to 25 mm. In the present application, the "diameter of the body portion" refers to the diameter of the maximum outer circle of the peripheral cutting edge when the milling cutter is working. It should be understood by those skilled in the art that there is no particular restriction on the diameter of the integral cemented carbide body portion, except that it is generally not made too large in terms of cost, and is generally not made too small in terms of processing difficulty.

[0060] In some embodiments, the depth of the secondary chip groove is 0.2 to 0.8 times, for example, 0.3 to 0.6 times, the width of the secondary chip groove. The depth of the secondary chip groove is not particularly limited, and is usually smaller than the width of the secondary chip groove.

[0061] In some embodiments, the bottom surface of the milling cutter has multiple bottom cutting edges, each of which independently has a bottom cutting edge front cutting edge, a bottom cutting edge back cutting edge and a bottom cutting edge. The bottom cutting edge is arranged corresponding to the peripheral cutting edge, and the connection between the bottom cutting edge and the peripheral cutting edge is a cutting tip, and a cutting tip chip breaker groove is arranged at the position of the cutting tip. Optionally, the cutting tip is arc-shaped.

[0062] In some embodiments, the distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.005 mm and less than or equal to 0.2 mm, greater than or equal to 0.006 mm and less than or equal to 0.15 mm, greater than or equal to 0.01 mm and less than or equal to 0.18 mm, greater than or equal to 0.02 mm and less than or equal to 0.17 mm, greater than or equal to 0.008 mm and less than or equal to 0.1 mm, greater than or equal to 0.009 mm and less than or equal to 0.09 mm, greater than or equal to 0.01 mm and less than or equal to 0.015 mm. The distance between the secondary chip groove and the peripheral cutting edge can improve the toughness of the cutting edge without affecting the performance of the tool.

[0063] Those skilled in the art should understand that the technical solution of the present application can be applied to various milling cutters, and those skilled in the art can apply the technical solution of the present application to various milling cutters according to actual conditions. In some embodiments, the milling cutter is one of the following: an end mill, a ball end mill, a taper mill, a ball end taper mill, a drum mill, and a bull nose mill.

[0064] In some embodiments, the secondary chip groove further includes a third rake angle surface adjacent to the second rake angle surface, the third rake angle surface forms a third rake angle of the peripheral edge, and the third rake angle of the peripheral edge is greater than the corresponding second rake angle of the peripheral edge.

[0065] The term "third rake angle of the peripheral blade" in the present application refers to the angle formed by the third rake angle surface in the measurement plane of the "first rake angle of the peripheral blade". For a specific selected point on the peripheral blade edge, there are the first rake angle of the peripheral blade, the second rake angle of the peripheral blade and the third rake angle of the peripheral blade at the same time. The second rake angle of the peripheral blade is the corresponding second rake angle of the peripheral blade of the third rake angle of the selected point on the edge.

[0066] By providing the auxiliary chip groove with the third rake angle of the peripheral blade, the chip flow direction can be effectively guided, the cutting resistance can be reduced, the cutting temperature can be lowered, the friction between the chips and the front cutting edge of the peripheral blade can be effectively suppressed, the chip removal efficiency can be improved, the generation of crescent-shaped wear on the front cutting edge can be effectively suppressed, and the tool life can be further improved.

[0067] The preparation method of the milling cutter in the prior art is known to those skilled in the art, and comprises the following steps: 1. calculating the shape of the milling cutter according to actual needs and selecting a suitable cemented carbide rod; 2. starting from the cemented carbide rod, grinding the cemented carbide rod to form a blank of the milling cutter; 3. forming a semi-finished product of the milling cutter by fine grinding; 4. subjecting the semi-finished product to PVD coating treatment to form a finished product of the milling cutter.

[0068] A method for preparing a milling cutter in the present application mainly involves machining a secondary chip groove on the basis of the semi-finished product, and then performing PVD coating treatment on the semi-finished product with the secondary chip groove.

[0069] In some embodiments, the secondary chip groove is prepared by a processing method that does not cause thermal damage.

[0070] In some embodiments, the secondary chip groove is prepared by a femtosecond pulse laser processing method. The secondary chip groove described in the present application can be prepared by femtosecond pulse laser processing and forming, for example, a precision CNC laser machine purchased from DMG Mori Seiki Machine Tool Trading Co., Ltd. under the trade name LASERTEC 50Shape can be used. It is generally believed that laser processing and forming will deteriorate the performance of cemented carbide. For example, picosecond and nanosecond processing will cause thermal damage, forming a thermal damage layer at the secondary chip groove, damaging the tool, and the surface finish is very poor. Not only can it not meet the finishing requirements, but the tool life is sharply reduced. Without being limited by theory, it is believed that the reason for the generation of this thermal damage layer is that the high temperature generated during the processing causes the cemented carbide to oxidize, the microstructure in the alloy changes, and the hardness and wear resistance are reduced. This can be clearly found by comparing the life of the tool without the thermal damage layer. The life of the tool with the thermal damage layer is often less than half of the tool without the thermal damage layer, and some even deteriorate to one-fifth of the normal life or even shorter. The use of femtosecond pulse laser processing, due to its extremely high speed, will not cause thermal damage, and the surface finish can reach 0.1-0.2nm, and can even be mirror-finished, which is suitable for fine processing. After the auxiliary chip groove is set, the sharpness of the tool edge is significantly improved, greatly reducing the cutting resistance. The reinforcement part can play a good role in chip breaking and chip separation, thereby effectively controlling the length of the chips, reducing the chip size, and improving the chip removal efficiency. The friction and extrusion force between the chips and the workpiece are reduced, thereby significantly improving the surface finish of the product. The design of the reinforcement part enhances the strength of the milling cutter edge, reduces the occurrence of chipping, and effectively increases the processing life of the milling cutter. High-precision, high-flexibility, and high-efficiency processing is achieved.

[0071] The above ranges can be used alone or in combination. The present application can be more easily understood through the following examples.

[0072] Example

[0073] Example 1

[0074] like Figures 1 to 3As shown, this embodiment discloses a solid carbide milling cutter, which comprises a body part 100, a shank part 300 for connecting to a machine tool, and a neck part 200 connecting the body part and the shank part, wherein the body part 100 is made of solid carbide, the body part 100 has four peripheral cutting edges 110 and four main chip grooves 120 corresponding to the peripheral cutting edges, the main chip grooves are spiral grooves, the angle of the spiral grooves is 25 degrees, the peripheral cutting edges 110 each independently have a peripheral cutting edge rake face 111, a peripheral cutting edge flank face 112 and a peripheral cutting edge 113, wherein the peripheral cutting edge rake face 111 is at the peripheral cutting edge 113. Each of 13 forms a first rake angle of the peripheral blade, characterized in that a secondary chip groove 10 is arranged on the peripheral blade front cutting edge 111, and the secondary chip groove extends in the length direction along the direction of the peripheral blade edge 113, and the secondary chip groove 10 has a groove surface 11 close to the peripheral blade edge, which is a second rake angle surface, so that the groove surface 11 of the secondary chip groove close to the peripheral blade edge forms a second rake angle of the peripheral blade, and the second rake angle of the peripheral blade is greater than the corresponding first rake angle of the peripheral blade, and the secondary chip groove has a plurality of groove segments, wherein the spacing between two adjacent groove segments is about 1mm, thereby forming a reinforcement portion, namely the peripheral blade reinforcement rib 20, and the length of each groove segment is 8mm.

[0075] The second rake angle of the peripheral edge is about 20 degrees greater than the first rake angle of the peripheral edge. Figure 4 and Figure 5 A schematic diagram of the second rake angle of the peripheral blade and the first rake angle of the peripheral blade is shown. Figure 4 Schematic diagram of a milling cutter provided with a secondary chip groove 10 cutting a workpiece. Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle chip point circle A. Figure 5 The angle α is formed by the front cutting edge of the peripheral blade, which is the first front angle of the peripheral blade, and the angle is about 5 degrees. The angle β is formed by the groove surface of the secondary chip groove 10 close to the peripheral blade edge (i.e., the second front angle surface 11), which is the second front angle of the peripheral blade, and the angle is about 25 degrees.

[0076] The diameter of the main body is 25 mm, the width of the secondary chip groove is 2 mm, the depth of the secondary chip groove is 0.6 mm, and the distance between the secondary chip groove and the peripheral cutting edge is about 0.03 mm.

[0077] Figures 6 to 9 The cutting diagram of the milling cutter provided with the auxiliary chip groove 10 of the present application and the milling cutter not provided with the auxiliary chip groove of the prior art is shown as an example. Figure 6 Schematic diagram of a milling cutter provided with a secondary chip groove 10 cutting a workpiece. Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle chip point circle B. Figure 8 This is a schematic diagram of a workpiece being cut by a milling cutter without a secondary chip groove. Fig. 9 for Figure 8 A partial enlarged schematic diagram of the middle chip point circle C. In the figure, 400 is the feed per tooth of the cutting edge. As can be seen from the figure, by setting the secondary chip groove, the sharpness of the peripheral cutting edge is significantly improved, the area of ​​the cutting edge squeezed by the workpiece is reduced, the chip force is reduced, and thus the friction is reduced, the heat generation is reduced, the cutting is easier, the cutting resistance is significantly reduced, so that a higher feed per tooth can be set to improve the processing efficiency.

[0078] In addition, the circumferential blade reinforcement ribs 20 provided in the present application can play a good role in chip breaking, thereby effectively controlling the length of the chips, improving the chip removal efficiency, and reducing the extrusion force and friction between the chips and the workpiece, thereby significantly improving the surface finish of the product. At the same time, the design of the circumferential blade reinforcement ribs enhances the strength of the milling cutter edge, reduces the occurrence of chipping, and effectively increases the processing life of the milling cutter.

[0079] At the same time, the setting of the auxiliary chip groove 10 increases the carrying space of the cutting fluid, and the peripheral blade reinforcement ribs 20 enhance the turbulence of the cutting fluid, thereby improving the cooling effect and achieving sufficient cooling effect on the tool edge and chips. This innovative invention successfully suppresses the heat generated during the cutting process, improves the sharpness of the tool and takes into account the toughness, thereby significantly improving the processing efficiency and greatly extending the service life of the tool.

[0080] Example 2

[0081] like Fig.10 As shown, this embodiment discloses another integral carbide milling cutter, which is basically the same as Example 1, except that the secondary chip groove 10 also includes a third rake angle surface 12 adjacent to the second rake angle surface 11, and the third rake angle surface 12 forms a third rake angle of the peripheral blade, and the third rake angle of the peripheral blade is greater than the corresponding second rake angle of the peripheral blade.

[0082] Fig.10 The first rake angle α, the second rake angle β, and the third rake angle γ of the peripheral blade are shown in the figure. In the same measuring plane, the first rake angle α of the peripheral blade is formed by the front cutting face of the peripheral blade and is 5 degrees. The second rake angle of the peripheral blade is formed by the groove surface of the secondary chip groove close to the cutting edge of the peripheral blade (i.e., the second rake angle surface 11) and is 28 degrees. The third rake angle γ of the peripheral blade is formed by the third rake angle surface 12 and is 35 degrees.

[0083] By providing the auxiliary chip groove with the third rake angle of the peripheral blade, the chip flow direction can be effectively guided, the cutting resistance can be reduced, the cutting temperature can be lowered, the friction between the chips and the front cutting edge of the peripheral blade can be effectively suppressed, the chip removal efficiency can be improved, the generation of crescent-shaped wear on the front cutting edge can be effectively suppressed, and the tool life can be further improved.

[0084] Example 3

[0085] This embodiment discloses another integral carbide milling cutter, which is basically the same as Example 1, except that the spacing between two adjacent groove segments in this embodiment is about 3 mm, thereby forming a reinforcement portion, namely a peripheral blade reinforcement rib, that is, the width of the reinforcement rib is 3 mm, and the length of each groove segment is 3 times the spacing, that is, 9 mm.

[0086] Example 4

[0087] like Figures 11 to 13 As shown, this embodiment discloses a solid carbide milling cutter, comprising a body part 100, a shank part 300 for connecting to a machine tool, and a neck part 200 connecting the body part and the shank part, wherein the body part 100 is made of solid carbide, the body part 100 has four peripheral cutting edges 110 and four main chip grooves 120 corresponding to the peripheral cutting edges, the main chip grooves are spiral grooves, and the angle of the spiral grooves is 15 degrees. The transition edge of the milling cutter is chamfered. A secondary chip groove 10 is arranged on the front cutting edge of the peripheral blade, and the secondary chip groove extends in the length direction along the direction of the peripheral blade edge. The secondary chip groove 10 has a groove surface close to the peripheral blade edge, which is a second front angle surface, so that the groove surface of the secondary chip groove close to the peripheral blade edge forms a second front angle of the peripheral blade, and the second front angle of the peripheral blade is greater than the corresponding first front angle of the peripheral blade, and the secondary chip groove has a plurality of groove segments, wherein the spacing between two adjacent groove segments is about 2 mm, thereby forming a reinforcement portion, namely a peripheral blade reinforcement rib (not shown in the figure), and the length of each groove segment is 10 times the spacing, that is, 20 mm.

[0088] The diameter of the main body is 25 mm, the width of the secondary chip groove is 2 mm, the depth of the secondary chip groove is 0.8 mm, and the distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.01 mm and less than or equal to 0.015 mm.

[0089] The main body 100 has a milling cutter bottom surface, and the milling cutter bottom surface has a plurality of bottom cutting edges 130, and the bottom cutting edges 130 are arranged corresponding to the peripheral cutting edges 110. Fig.13 As shown, the bottom cutting edge 130 independently has a bottom cutting edge rake face 131, a bottom cutting edge flank face 132 and a bottom cutting edge 133, and the connection between the bottom cutting edge 130 and the peripheral cutting edge 110 is a cutting tip 140, and the cutting tip is arc-shaped, and a cutting tip chip breaker 30 is arranged at the position of the cutting tip. The arc radius is 6 mm.

[0090] The secondary chip groove can significantly improve the sharpness of the peripheral blade edge and effectively reduce the cutting resistance. The peripheral blade reinforcement rib can play a good chip breaking role, so that the length of the chips can be effectively controlled, the chip removal efficiency can be improved, and the friction and extrusion force between the chips and the workpiece are reduced, thereby significantly improving the surface finish of the product. The design of the peripheral blade reinforcement rib enhances the strength of the milling cutter edge, reduces the occurrence of chipping, and effectively improves the processing life of the milling cutter. The setting of the secondary chip groove increases the carrying space of the cutting fluid, and the peripheral blade reinforcement rib enhances the turbulence of the cutting fluid, improves the cooling efficiency, and achieves a sufficient cooling effect on the tool edge and chips, suppressing the heat generated during the cutting process, thereby significantly improving the processing efficiency and greatly extending the service life of the tool. This improvement successfully solves the industry problem of difficult processing of high-temperature alloy materials.

[0091] Example 5

[0092] like Figures 14 to 16 As shown, this embodiment discloses a solid carbide milling cutter, which is a ball-end milling cutter, comprising a body part 100, a shank part 300 for connecting to a machine tool, and a neck part 200 connecting the body part and the shank part, wherein the body part 100 is made of solid carbide, and the body part 100 has two peripheral cutting edges 110 and two main chip grooves 120 corresponding to the peripheral cutting edges. The main chip groove is a spiral groove, and the angle of the spiral groove is 30 degrees. A secondary chip groove (not shown in the figure) is arranged on the front cutting edge of the peripheral blade, and the secondary chip groove extends in the length direction along the direction of the peripheral blade edge. The secondary chip groove has a groove surface close to the peripheral blade edge, which is a second front angle surface, so that the groove surface of the secondary chip groove close to the peripheral blade edge forms a second front angle of the peripheral blade, and the second front angle of the peripheral blade is greater than the corresponding first front angle of the peripheral blade, and the secondary chip groove has a plurality of groove segments, wherein the spacing between two adjacent groove segments is about 0.6 mm, thereby forming a peripheral blade reinforcement rib (not shown in the figure), and the length of each groove segment is 10 times the spacing, that is, 6 mm.

[0093] The diameter of the main body is 25 mm, the width of the secondary chip groove is 0.8 mm, the depth of the secondary chip groove is 0.3 mm, and the distance between the secondary chip groove and the peripheral cutting edge is about 0.01 mm.

[0094] like Fig.15 and Fig.16As shown, the body part 100 has a milling cutter bottom surface, and the milling cutter bottom surface has a bottom cutting edge 130, and the connection between the bottom cutting edge 130 and the peripheral cutting edge 110 is a tool tip 140, and the bottom cutting edge 130 and the tool tip 140 are arc-shaped, and a tool tip chip breaker 30 is provided at the position of the tool tip. For a ball-end milling cutter, the bottom cutting edge includes a chisel edge located at the end, and the bottom cutting edge and the tool tip are not clearly distinguished. The arc-shaped edge near the chisel edge can also be regarded as a part of the bottom cutting edge, and the tool tip chip breaker 30 extends to the position of the bottom cutting edge 130.

[0095] The secondary chip groove and the tip chip breaker groove can significantly improve the sharpness of the cutting edge and effectively reduce the cutting resistance. In the prior art, the grinding wheel cannot be used to process this part. The inventor of the present application unexpectedly found that the front cutting edge can be processed by femtosecond laser processing equipment to form the secondary chip groove and chip breaker groove described in the present application, and circumferential blade reinforcement ribs are provided. The circumferential blade reinforcement ribs can play a good role in chip breaking and improving the strength of the cutting edge, so that the length of the chips can be effectively controlled, the chip removal efficiency can be improved, and the friction and extrusion force between the chips and the workpiece are reduced, thereby significantly improving the surface finish of the product. The design of the circumferential blade reinforcement ribs enhances the strength of the milling cutter cutting edge, reduces the occurrence of chipping, and effectively improves the processing life of the milling cutter. The setting of the auxiliary chip groove increases the carrying space of the cutting fluid, and the peripheral blade reinforcement ribs enhance the turbulence of the cutting fluid, thereby improving the cooling efficiency, achieving sufficient cooling effect on the tool edge and chips, and suppressing the heat generated during the cutting process, thereby significantly improving the processing efficiency and greatly extending the service life of the tool, successfully solving the problem of excessive temperature in metal cutting and solving the industry problem of difficult processing of high-temperature alloy materials.

[0096] Example 6

[0097] like Figures 17 to 19As shown, this embodiment discloses a solid carbide milling cutter, which comprises a body part 100, a shank part 300 for connecting to a machine tool, and a neck part 200 connecting the body part and the shank part, wherein the body part 100 is made of solid carbide, the body part 100 has four peripheral cutting edges 110 and four main chip grooves 120 corresponding to the peripheral cutting edges, the main chip grooves are spiral grooves, the angle of the spiral grooves is 25 degrees, the peripheral cutting edges 110 each independently have a peripheral cutting edge rake face 111, a peripheral cutting edge flank face 112 and a peripheral cutting edge 113, wherein the peripheral cutting edges The front cutting edge 111 forms a first circumferential cutting edge angle at each location of the circumferential cutting edge 113, and is characterized in that a secondary chip groove 10 is provided on the circumferential cutting edge front cutting edge 111, and the secondary chip groove extends in the length direction along the direction of the circumferential cutting edge 113, and the secondary chip groove 10 has a groove surface 11 close to the circumferential cutting edge and a groove surface 13 away from the circumferential cutting edge, and the groove surface 11 close to the circumferential cutting edge is a second rake angle surface, so that the groove surface 11 of the secondary chip groove close to the circumferential cutting edge forms a second circumferential cutting edge angle, and the second circumferential cutting edge angle is greater than the corresponding first circumferential cutting edge angle, which is basically consistent with Example 1.

[0098] The difference is that a plurality of reinforcing parts are provided in the secondary chip groove 10, and the reinforcing parts are protrusions 14 provided on the groove surface 13 away from the peripheral cutting edge, and the protrusions 14 reduce the cross-sectional area of ​​the secondary chip groove at the protrusions by more than 30%, so that the secondary chip groove has a plurality of groove segments, wherein the width of the reinforcing part is 1 mm, and the length of each groove segment is 6 mm.

[0099] Fig.19 FIG. 1 is a partial schematic diagram of a secondary chip groove 10 in which a plurality of protrusions 14 are arranged on the groove surface 13 away from the peripheral cutting edge. Points a, b, c, and d in the figure are points on the groove surface 13 away from the peripheral cutting edge. The line segments corresponding to points a, b, c, and d exemplarily show the direction of the cross section of the secondary chip groove at the point. After the protrusions are arranged, the cross-sectional area of ​​the secondary chip groove at the protrusions (i.e., the cross-sectional area between point a and point b) is reduced by more than 30% relative to the cross-sectional area of ​​the secondary chip groove without the protrusions (i.e., the cross-sectional area at point c). That is, the protrusion 14 as a reinforcement portion is reduced in Fig.19 The distance between point a and point b in the figure is the width of the reinforcement portion. Similarly, the cross-sectional area of ​​the secondary chip groove at point d is reduced by more than 30% compared with that at point c. Point d is another reinforcement portion, and the distance between point b and point d is the length of one of the groove segments.

[0100] The protrusion is located on the groove surface away from the peripheral cutting edge. After the chips enter the secondary chip groove, the protrusion can produce chip breaking or chip splitting effects, thereby effectively controlling the length of the chips, reducing the chip size, improving the chip removal efficiency, and effectively inhibiting the accumulation of heat during the cutting process. The protrusion can also enhance the turbulence of the cutting fluid and further improve the cooling effect.

[0101] Cutting test

[0102] The solid carbide milling cutters of Examples 1, 2 and 3 of the present application were used for metal cutting tests, with a solid carbide milling cutter without a secondary chip groove as control 1, and a solid carbide milling cutter with a secondary chip groove but no reinforcement (i.e., no peripheral edge reinforcement ribs or protrusions) as control 2. The processing materials were titanium alloy, nickel-based alloy, aluminum alloy, and stainless steel, respectively, and the processing workpiece was a 100mm*50mm*25mm inner cavity groove. The C42 machine tool of Hammer was used for trial processing, and the cutting fluid used was the SF15 water-soluble cutting fluid of Anmei Technology Co., Ltd.

[0103] The processing conditions of different processing materials are as follows:

[0104] Table 1 Titanium alloy processing conditions

[0105]

[0106] Table 2 Processing of nickel-based alloys

[0107]

[0108] Table 3 Aluminum alloy processing conditions

[0109]

[0110] Table 4 Stainless steel processing

[0111]

[0112] As can be seen from the above table, by adopting the technical solution of the present application, the chip size is significantly reduced, the machining linear speed and feed per tooth of the tool are improved to varying degrees, and the tools of Example 1 and Example 2 can be set with a higher feed per tooth, reaching about 1.5 to 3 times that of the prior art. The tool machining life is increased by about 2-3 times compared with the prior art. The cutting performance of the tool is significantly improved. The tools in Example 4, Example 5, and Example 6 of the present application can also achieve the technical effects in the above table compared with the prior art.

[0113] Edge wear comparison

[0114] After completing the cutting test of titanium alloy, the cutting edges of the milling cutter of Example 1 and the milling cutter of Control 1 were partially enlarged for comparison. The comparison of cutting edge wear is shown in FIG. Fig. 20 , Fig. 20 The left side of the figure shows the wear of the milling cutter edge of Example 1, and the right side of the figure shows the wear of the milling cutter edge of Control 1. It can be seen that the edge in the left figure has almost no obvious wear, while the edge on the right is seriously worn. The arrows show the two crescent-shaped grooves on the front face of the milling cutter of Control 1. The friction force increases due to wear on the edge, thus generating thermal cracks. This shows that the auxiliary chip groove of the reinforcement part can significantly reduce tool wear and extend the service life of the tool.

[0115] The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A solid carbide milling cutter, comprising a body portion, an optional shank portion for direct or indirect connection with a machine tool, and an optional neck portion connecting the body portion and the shank portion, wherein the body portion is made of solid carbide, The body portion has a plurality of peripheral cutting edges and a plurality of main chip grooves corresponding to the peripheral cutting edges, wherein the peripheral cutting edges each independently have a peripheral cutting edge rake face, a peripheral cutting edge flank face and a peripheral cutting edge, wherein the peripheral cutting edge rake face forms a peripheral cutting edge first rake angle at each location of the peripheral cutting edge, characterized in that: A secondary chip groove is arranged on the front cutting edge of the peripheral blade, and the secondary chip groove extends in the length direction along the direction of the peripheral blade edge. The secondary chip groove has a groove surface close to the peripheral blade edge and a groove surface away from the peripheral blade edge. The groove surface close to the peripheral blade edge is a second front angle surface, so that the groove surface of the secondary chip groove close to the peripheral blade edge forms a second front angle of the peripheral blade, and the second front angle of the peripheral blade is greater than the corresponding first front angle of the peripheral blade, and one or more reinforcement parts are arranged in the secondary chip groove, and the reinforcement part is a reinforcement rib or a protrusion arranged on the groove surface away from the peripheral blade edge. The protrusion reduces the cross-sectional area of ​​the secondary chip groove at the protrusion by more than 30%, so that the secondary chip groove has a plurality of groove segments, wherein the width of the reinforcement part is 0.5mm to 2.0mm, and the length of each groove segment is 2 to 15 times the width, and the reinforcement part is formed by retaining the original material in the process of forming the secondary chip groove.

2. The solid carbide milling cutter according to claim 1, characterized in that: The second rake angle of the peripheral blade is 3 degrees to 45 degrees greater than the first rake angle of the peripheral blade.

3. The solid carbide milling cutter according to claim 1, characterized in that: The main chip groove is a spiral groove, the angle of the spiral groove is the angle between the spiral direction and the milling cutter spindle, and the angle of the spiral groove is between 3 and 55 degrees.

4. The solid carbide milling cutter according to claim 2, characterized in that: The length of each slot segment is 3 to 12 times the width.

5. The solid carbide milling cutter according to claim 1, characterized in that: The width of the secondary chip groove is 0.15 mm to 3 mm.

6. The solid carbide milling cutter according to claim 1, characterized in that: The depth of the secondary chip groove is 0.1 to 2 mm.

7. The solid carbide milling cutter according to claim 1, characterized in that: The body portion has a diameter of 1 mm to 50 mm.

8. The solid carbide milling cutter according to claim 6, characterized in that: The depth of the secondary chip groove is 0.2 to 0.8 times the width of the secondary chip groove.

9. The solid carbide milling cutter according to claim 1, characterized in that: The main body part has a milling cutter bottom surface, and the milling cutter bottom surface is provided with multiple bottom cutting edges, and the bottom cutting edges each independently have a bottom edge rake face, a bottom edge flank face and a bottom edge. The bottom cutting edge is arranged corresponding to the peripheral cutting edge, and the connection between the bottom cutting edge and the peripheral cutting edge is a tool tip, and a tool tip chip breaker groove is arranged at the position of the tool tip. Optionally, the tool tip is arc-shaped.

10. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.005 mm and less than or equal to 0.2 mm.

11. The solid carbide milling cutter according to claim 1, characterized in that: The milling cutter is one of the following: an end mill, a ball end mill, a taper milling cutter, a ball end taper milling cutter, a drum milling cutter, and a bull nose milling cutter.

12. The solid carbide milling cutter according to claim 1, characterized in that: The second rake angle of the peripheral blade is 5 degrees to 35 degrees greater than the first rake angle of the peripheral blade.

13. The solid carbide milling cutter according to claim 3, characterized in that: The main chip groove is a spiral groove, the angle of the spiral groove is the angle between the spiral direction and the milling cutter spindle, and the angle of the spiral groove is between 15 degrees and 50 degrees.

14. The solid carbide milling cutter according to claim 3, characterized in that: The main chip groove is a spiral groove, the angle of the spiral groove is the angle between the spiral direction and the milling cutter spindle, and the angle of the spiral groove is between 25 degrees and 45 degrees.

15. The solid carbide milling cutter according to claim 1, characterized in that: The width of the secondary chip groove is 3% to 30% of the diameter of the body part.

16. The solid carbide milling cutter according to claim 1, characterized in that: The depth of the secondary chip groove is 0.3 to 1.5 mm.

17. The solid carbide milling cutter according to claim 1, characterized in that: The diameter of the body portion is 5 mm to 40 mm.

18. The solid carbide milling cutter according to claim 1, characterized in that: The diameter of the body portion is 6 mm to 25 mm.

19. The solid carbide milling cutter according to claim 6, characterized in that: The depth of the secondary chip groove is 0.3 to 0.6 times the width of the secondary chip groove.

20. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.006 mm and less than or equal to 0.15 mm.

21. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.01 mm and less than or equal to 0.18 mm.

22. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.02 mm and less than or equal to 0.17 mm.

23. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.008 mm and less than or equal to 0.1 mm.

24. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.009 mm and less than or equal to 0.09 mm.

25. The solid carbide milling cutter according to claim 1, characterized in that: The distance between the secondary chip groove and the peripheral cutting edge is greater than or equal to 0.01 mm and less than or equal to 0.015 mm.

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