Alloy chip breaking high-speed milling cutter

Abstract

The invention relates to an alloy chip breaking high-speed milling cutter, and relates to the technical field of product machining cutters, the alloy chip breaking high-speed milling cutter comprises a cutter handle part and a cutting part, the cutting part comprises a cutter base and cutter teeth, the cutter base is coaxially and fixedly connected with the end face of the cutting part, and a plurality of cutter teeth are spirally arranged on the peripheral face of the cutter base; all the cutter teeth are symmetrically arranged with the axis of the cutter base as the center, a plurality of staggered tooth grooves are evenly formed in the cutter teeth at intervals, teeth are formed in the intervals between the adjacent staggered tooth grooves, and the staggered tooth grooves in the different cutter teeth are arranged in a staggered mode in the axis direction of the cutter base. And the teeth on different cutter teeth cover each other in the circumferential direction. The milling cutter has the effects of improving the cutting efficiency and the chip breaking effect when the milling cutter is used for milling cast aluminum and reducing the cutting resistance and the machine tool load.

Description

Technical Field

[0001] The present application relates to the technical field of product processing tools, and in particular to an alloy chip-breaking high-speed milling cutter. Background Art

[0002] A milling cutter is a rotating tool used for milling on a milling machine. It usually has one or more teeth. The rotating milling cutter cuts the workpiece intermittently through each tooth in sequence. It is mainly used for processing planes, steps, grooves, forming surfaces and cutting off workpieces. It is widely used in the field of mechanical manufacturing and processing. It is one of the important tools to achieve precise shape and size of workpieces. When traditional milling cutters are milling large-addition cast aluminum, aluminum chips are not easy to break, the cutting resistance is large, the cutter is easy to vibrate, the load on the machine tool is relatively high, and the cutting amount each time the cutter runs is small. Generally, each cut can only cut 1-2mm deep. Multiple cuts are required to meet the requirements, which increases the processing cycle and is not convenient for rapid roughing of cast aluminum. Summary of the invention

[0003] In order to improve the cutting efficiency and chip breaking effect of the milling cutter when milling cast aluminum and reduce the cutting resistance and machine tool load, the present application provides an alloy chip breaking high-speed milling cutter.

[0004] The present application provides an alloy chip-breaking high-speed milling cutter adopts the following technical solution: A high-speed milling cutter with alloy chip breaking comprises a shank portion and a cutting portion, wherein the cutting portion comprises a base and teeth, wherein the base is coaxially and fixedly connected to the end face of the cutting portion, and a plurality of teeth are spirally arranged on the circumferential surface of the base, wherein all teeth are symmetrically arranged with the axis of the base as the center, and a plurality of staggered tooth grooves are evenly and spaced apart on the teeth, wherein the intervals between adjacent staggered tooth grooves form teeth, and the staggered tooth grooves on different teeth are mutually staggered in the axial direction of the base, and the teeth on different teeth cover each other in the circumferential direction.

[0005] By adopting the above technical scheme, during the milling process, since the staggered tooth grooves are set on the cutter teeth, the teeth formed between adjacent staggered tooth grooves can respectively undertake cutting tasks, thereby reducing the cutting area of ​​a single cutter tooth, and the staggered tooth groove area does not need to be subjected to cutting force, and the cutting resistance of each tooth is relatively small, so that the cutting resistance on each cutter tooth is 40% to 50% smaller than the cutting resistance on the cutter teeth of the traditional milling cutter; and the staggered tooth grooves on different cutter teeth are staggered with each other in the axial direction of the cutter base, and the teeth on different cutter teeth are also staggered with each other in the axial direction of the cutter base, and the teeth on different cutter teeth cover each other, and the cutting resistance of the teeth on different cutter teeth is relatively balanced, so that the cutting depth of each cutter can be increased, and the cutting efficiency is effectively improved; at the same time, the setting of the staggered tooth grooves makes it easier for aluminum chips to break during the cutting process, improves the chip breaking effect, and reduces the interference of aluminum chips on the cutting process; moreover, the dispersed cutting force also reduces the load of the machine tool, reduces the occurrence of tool vibration, and is beneficial to improving the processing accuracy and surface quality.

[0006] Preferably, the number of the cutter teeth is four, and the four cutter teeth are respectively a No. 1 cutter, a No. 2 cutter, a No. 3 cutter, and a No. 4 cutter along the cutting direction of the milling cutter.

[0007] By adopting the above technical solution, the teeth of the four cutter teeth cooperate with each other, which can share the cutting force more evenly during the cutting process, further improve the cutting stability and accuracy, and the vibrations generated by different cutter teeth during cutting can offset each other, effectively reducing the vibration phenomenon and making the processed surface smoother and flatter.

[0008] Preferably, the plane where the cutting portion is located away from one end of the shank portion is a cutting surface, the distance between the staggered tooth groove closest to the cutting surface on the No. 1 edge and the cutting surface is La, the distance between the staggered tooth groove closest to the cutting surface on the No. 2 edge and the cutting surface is Lb, the distance between the staggered tooth groove closest to the cutting surface on the No. 3 edge and the cutting surface is Lc, and the distance between the staggered tooth groove closest to the cutting surface on the No. 4 edge and the cutting surface is Ld, and La, Lb, Lc, and Ld satisfy Ld-Lc=Lc-Lb=Lb-La.

[0009] By adopting the above technical scheme, the order and depth of different teeth cutting into the workpiece can be reasonably controlled during the milling process, and the teeth on the No. 1 edge, No. 2 edge, No. 3 edge and No. 4 edge are successively involved in cutting the workpiece allowance, so as to avoid as much as possible the problems of a sharp increase in cutting resistance, excessive machine tool load and possible tool damage caused by excessive cutting depth at the same time. In addition, this design of successively increasing cutting distance can also make the cutting force act more smoothly on the tool and the workpiece, improve the balance of the milling cutter when rotating, and further reduce the vibration and noise during the cutting process of the milling cutter; at the same time, it helps to optimize the chip discharge path, and the chips can be discharged through the staggered tooth grooves on the No. 1 edge, No. 2 edge, No. 3 edge and No. 4 edge in sequence to prevent chip accumulation from affecting the cutting effect, thereby making the cutting process smoother.

[0010] Preferably, the staggered tooth groove is opened in a triangular shape on the cross section of the plane where the axis of the knife base is located, and the lengths of both side sides of the staggered tooth groove are equal.

[0011] By adopting the above technical solution, the triangular staggered tooth groove design can effectively disperse the cutting force and reduce stress concentration. During the cutting process, the triangular structure can withstand greater cutting pressure and reduce the risk of deformation and damage of the staggered tooth groove. At the same time, the triangular shape is conducive to the curling and breaking of chips, further improving the chip breaking effect and improving the smoothness and efficiency of processing.

[0012] Preferably, a rounded corner is reserved at the vertex where the two side edges of the staggered tooth groove intersect.

[0013] By adopting the above technical solution, setting fillets on the staggered tooth grooves can effectively reduce stress concentration and avoid cracks or fractures at the staggered tooth grooves during the cutting process. The presence of fillets can also make the chips pass through the tooth grooves more smoothly, reducing the friction and collision between the chips and the staggered tooth grooves, thereby reducing cutting resistance and improving cutting efficiency. In addition, fillets can enhance the strength and durability of the staggered tooth grooves, extend the service life of the milling cutter, and ensure the stability and continuity of the processing process.

[0014] Preferably, the angle between the two side edges of the staggered tooth groove is α, and α is 60°.

[0015] By adopting the above technical solution, the 60° α design can optimize the force distribution of the teeth to the greatest extent while ensuring cutting efficiency and chip breaking effect; a smaller α may cause insufficient tooth strength and easy damage; a larger α may affect the curling, cutting and discharge of chips during the cutting process. The 60° α enables the teeth to evenly disperse the stress when subjected to cutting force, improves the durability of the teeth, and helps the chips to curl and break smoothly, reducing the interference of chips on processing, thereby improving the stability and precision of processing.

[0016] Preferably, a side edge of the tooth for cutting a workpiece is provided with a cutting back angle, and the cutting back angle is used to reduce the sharpness of the tooth.

[0017] By adopting the above technical solution, if the angle of the teeth is too sharp, the teeth are prone to peeling off. Therefore, a cutting back angle is opened to reduce the sharpness of the teeth. The rigidity of the teeth on the milling cutter will be relatively stronger. The rigidity and strength of the teeth are improved, making the teeth more stable during the cutting process and less prone to deformation or damage, thereby improving the overall performance and service life of the milling cutter and ensuring the quality and efficiency of processing.

[0018] Preferably, the tooth width is Ws, and Ws satisfies 2.75mm<Ws<3.25mm, the tooth height is Hs, and Hs satisfies 2.75mm<Ws<3.25mm, and the staggered tooth groove width is Wt, and Wt satisfies 3.79mm<Wt<4.29mm.

[0019] By adopting the above technical solution, the tooth width of 2.75-3.25mm can ensure that the teeth have sufficient strength to withstand the pressure and friction during the cutting process, and provide good cutting accuracy and surface quality. Narrower teeth may be insufficiently strong and easily worn or broken; wider teeth may increase cutting resistance and affect cutting efficiency. This width design enables the milling cutter to achieve efficient cutting during the milling process while ensuring the stability and durability of the tool, thereby improving the efficiency and quality of processing. The blade height is in the range of 2.75mm - 3.25mm, which helps to maintain the rigidity and stability of the blade and reduce deformation during the cutting process. When the tooth groove width is 3.79mm - 4.29mm, it can provide sufficient space for the discharge and curling of chips, while reasonably dispersing the cutting force and reducing stress concentration, thereby improving the overall performance and service life of the milling cutter and ensuring processing accuracy and surface quality.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting staggered tooth grooves on the cutter teeth, the teeth formed between adjacent staggered tooth grooves can undertake cutting tasks respectively, reducing the cutting area of ​​a single cutter tooth and dispersing the cutting resistance, so that the cutting resistance of each tooth is relatively small, thereby effectively improving the cutting efficiency, reducing the machine tool load, improving the chip breaking effect, and reducing the interference of aluminum chips on the cutting process; 2. By setting four teeth, the staggered tooth grooves on different blades are staggered in the axial direction of the blade base, and the teeth on different blades cover each other, the cutting resistance of the teeth on different blades is relatively balanced, which further increases the cutting depth of each blade, improves the cutting stability and accuracy, and reduces the occurrence of blade vibration; 3. By setting the shape, angle and tooth width of the staggered tooth groove, the force distribution of the tool is optimized, the strength and durability of the tool are enhanced, the cutting resistance is reduced, good cutting accuracy and surface quality are guaranteed, the service life of the milling cutter is extended, and the processing efficiency and quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an alloy chip-breaking high-speed milling cutter provided in an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the processing position of the staggered tooth grooves on each cutter tooth in the embodiment of the present application.

[0023] Explanation of the reference numerals: 1. handle portion; 2. cutting portion; 21. base; 22. teeth; 221. staggered tooth grooves; 222. teeth; 223. No. 1 edge; 224. No. 2 edge; 225. No. 3 edge; 226. No. 4 edge; 2212. rounded corners; 2221. cutting back angle; 3. chamfered surface. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 This application is described in further detail.

[0025] The present application discloses an alloy chip-breaking high-speed milling cutter. Figure 1 , which includes a handle portion 1 and a cutting portion 2. The cutting portion 2 includes a blade base 21 and blade teeth 22. The blade base 21 is coaxial and fixedly connected to the end face of the cutting portion 2. A plurality of blade teeth 22 are spirally arranged on the circumferential surface of the blade base 21. In this embodiment, four blade teeth 22 are specifically arranged. The four blade teeth 22 are respectively a first blade 223, a second blade 224, a third blade 225, and a fourth blade 226 in the circumferential direction of the blade base 21. All blade teeth 22 are symmetrically arranged with the axis of the blade base 21 as the center, and a plurality of staggered tooth grooves 221 are evenly and spaced apart on the blade teeth 22.

[0026] Reference Figure 1 , the intervals between adjacent staggered tooth grooves 221 form teeth 222, and the staggered tooth grooves 221 on different teeth 22 are mutually offset in the axial direction of the blade base 21. The teeth 222 on different teeth 22 cover each other in the circumferential direction. During the milling process, the teeth 222 on the same tooth 22 respectively bear the cutting task and disperse the cutting resistance. The cutting resistance of each tooth 222 is relatively small, and the teeth 222 on different teeth 22 cover each other, so that the cutting depth of each knife can be increased, effectively improving the cutting efficiency. At the same time, the staggered tooth grooves 221 make the aluminum chips easier to break during the cutting process, reducing the interference of the aluminum chips on the cutting process.

[0027] Reference Figure 1 and Figure 2 , the plane where the end of the cutting portion 2 away from the shank portion 1 is located is the cutting surface 3. The distance between the staggered tooth groove 221 closest to the cutting surface 3 on the first edge 223 and the cutting surface 3 is La, the distance between the staggered tooth groove 221 closest to the cutting surface 3 on the second edge 224 and the cutting surface 3 is Lb, the distance between the staggered tooth groove 221 closest to the cutting surface 3 on the third edge 225 and the cutting surface 3 is Lc, and the distance between the staggered tooth groove 221 closest to the cutting surface 3 on the fourth edge 226 and the cutting surface 3 is Ld. Among them, La, Lb, Lc, and Ld satisfy Ld-Lc=Lc-Lb=Lb-La. In this embodiment, La is specifically set to 2mm, Lb is specifically set to 3.5mm, Lc is specifically set to 5mm, and Lc is specifically set to 6.5mm.

[0028] Reference Figure 1 and Figure 2 During the milling process, the teeth 222 on the first edge 223, the second edge 224, the third edge 225, and the fourth edge 226 sequentially participate in cutting the workpiece allowance. This design of sequentially increasing cutting distances allows the cutting force to act more smoothly on the tool and the workpiece, improving the balance of the milling cutter when rotating. At the same time, the chip discharge path is optimized, and the chips can be discharged in sequence through the staggered tooth grooves 221 on the first edge 223, the second edge 224, the third edge 225, and the fourth edge 226, preventing the accumulation of chips from affecting the cutting effect.

[0029] Reference Figure 1 and Figure 2 The staggered tooth groove 221 is formed in a triangular shape on the cross section of the plane where the axis of the knife base 21 is located. The lengths of the two sides of the staggered tooth groove 221 are equal, and the angle between the two sides of the staggered tooth groove 221 is α, and α is 60°. A fillet 2212 is reserved at the vertex where the two sides of the staggered tooth groove 221 intersect, and the radius of the fillet 2212 is 0.5mm. The triangular staggered tooth groove 221 can effectively disperse the cutting force and reduce stress concentration. At the same time, the triangular shape is conducive to the curling and breaking of the chips, further improving the chip breaking effect, and improving the smoothness and efficiency of the processing. The fillet 2212 can effectively reduce stress concentration and try to avoid cracks or breaks at α during the cutting process.

[0030] Reference Figure 1 and Figure 2A cutting back angle 2221 is provided on one side of the tooth 222 for cutting the workpiece, and the cutting back angle 2221 is used to reduce the sharpness of the tooth 222. If the tooth 222 is too sharp, the tooth 222 is easy to peel off, so the cutting back angle 2221 is provided to reduce the sharpness of the tooth 222, and the rigidity of the tooth 222 on the milling cutter will be relatively stronger, and the rigidity and strength of the tooth 222 are improved, so that the tooth 222 is more stable during the cutting process, and is not easy to be deformed or damaged, thereby improving the overall performance and service life of the milling cutter, and ensuring the quality and efficiency of processing.

[0031] Reference Figure 1 and Figure 2 , the width of the tooth 222 is Ws, and Ws satisfies 2.75mm<Ws<3.25mm, ensuring that the tooth 222 has sufficient strength to withstand the pressure and friction during the cutting process. Narrower teeth 222 may be insufficiently strong and easily worn or broken. Wider teeth 222 may increase cutting resistance and affect cutting efficiency. The height of the tooth 222 is Hs, and Hs satisfies 2.75mm<Hs<3.25mm, ensuring the rigidity and stability of the blade and reducing deformation during the cutting process. The width of the staggered tooth groove 221 is Wt, and Wt satisfies 3.79mm<Wt<4.29mm. It can provide sufficient space for the discharge and curling of chips, while reasonably dispersing the cutting force and reducing stress concentration. In this embodiment, the width Ws of the tooth 222 is specifically 3mm. The height Hs of the tooth 222 is specifically 3mm. The width Wt of the staggered tooth groove 221 is specifically 4.04mm.

[0032] In addition, when cutting a relatively soft metal such as cast aluminum, the aluminum chips generated are easy to stick to the tooth 222, so a coating can be provided on the surface of the milling cutter, and the coating can be AluCon coating, thereby improving the lubricity of the milling cutter surface. Try to avoid chip accumulation and provide maximum coating adhesion, so that the metal chips milled are not easy to stay on the cutting edge of the tooth 222.

[0033] The implementation principle of an alloy chip-breaking high-speed milling cutter in an embodiment of the present application is: through the staggered tooth grooves 221 that are evenly and spaced apart on the teeth 22, and the staggered distribution of the staggered tooth grooves 221 on different teeth 22. The mutual coverage on the No. 1 edge 223, the No. 2 edge 224, the No. 3 edge 225, and the No. 4 edge 226 reduces the cutting resistance, ensures the cutting depth, and can achieve a cutting depth of 2-3mm per cut, and the cutting edge is not easy to wear. During the milling process, the dispersion of cutting tasks and the balance of cutting resistance are achieved, and the cutting efficiency and depth are improved. The specific distance between the staggered tooth grooves 221 on each tooth 22 and the cutting surface 3 ensures smooth cutting and optimizes the chip discharge path. The special coating further improves the performance of the milling cutter surface, prevents aluminum chips from sticking, makes the milling process smoother and more efficient, and ensures processing quality and efficiency.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An alloy chip-breaking high-speed milling cutter, comprising a shank portion (1) and a cutting portion (2), characterized in that: The cutting portion (2) comprises a blade base (21) and blade teeth (22); the blade base (21) is coaxially and fixedly connected to the end surface of the cutting portion (2); a plurality of blade teeth (22) are arranged in a spiral shape on the circumferential surface of the blade base (21); all the blade teeth (22) are symmetrically arranged with the axis of the blade base (21) as the center; a plurality of staggered tooth grooves (221) are evenly and spaced apart on the blade teeth (22); the intervals between adjacent staggered tooth grooves (221) form teeth (222); the staggered tooth grooves (221) on different blade teeth (22) are staggered with each other in the axial direction of the blade base (21); and the teeth (222) on different blade teeth (22) cover each other in the circumferential direction.

2. The alloy chip-breaking high-speed milling cutter according to claim 1, characterized in that: The number of the cutter teeth (22) is four, and the four cutter teeth (22) are, in sequence, a first cutting edge (223), a second cutting edge (224), a third cutting edge (225), and a fourth cutting edge (226) along the cutting direction of the milling cutter.

3. The alloy chip-breaking high-speed milling cutter according to claim 2, characterized in that: The plane where one end of the cutting portion (2) is away from the shank portion (1) is located is a cutting surface (3); the distance between the staggered tooth groove (221) on the first blade (223) closest to the cutting surface (3) and the cutting surface (3) is La; the distance between the staggered tooth groove (221) on the second blade (224) closest to the cutting surface (3) and the cutting surface (3) is Lb; the distance between the staggered tooth groove (221) on the third blade (225) closest to the cutting surface (3) and the cutting surface (3) is Lc; the distance between the staggered tooth groove (221) on the fourth blade (226) closest to the cutting surface (3) and the cutting surface (3) is Ld; and La, Lb, Lc, and Ld satisfy Ld-Lc=Lc-Lb=Lb-La.

4. The alloy chip-breaking high-speed milling cutter according to claim 1, characterized in that: The staggered tooth groove (221) is formed in a triangular shape on the cross section of the plane where the axis of the knife base (21) is located, and the lengths of the two side sides of the staggered tooth groove (221) are equal.

5. The alloy chip-breaking high-speed milling cutter according to claim 4, characterized in that: A rounded corner (2212) is reserved at the vertex where the two sides of the staggered tooth groove (221) intersect.

6. The alloy chip-breaking high-speed milling cutter according to claim 1, characterized in that: The angle between the two side edges of the staggered tooth groove (221) is α, and α is 60°.

7. The alloy chip-breaking high-speed milling cutter according to claim 1, characterized in that: A cutting back angle (2221) is provided on one side of the tooth (222) for cutting a workpiece, and the cutting back angle (2221) is used to reduce the sharpness of the tooth (222).

8. The alloy chip-breaking high-speed milling cutter according to claim 1, characterized in that: The width of the tooth (222) is Ws, and Ws satisfies 2.75 mm < Ws < 3.25 mm. The height of the tooth (222) is Hs, and Hs satisfies 2.75 mm < Ws < 3.25 mm. The width of the staggered tooth groove (221) is Wt, and Wt satisfies 3.79 mm < Wt < 4.29 mm.

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