Milling forming groove cutter

Abstract

The utility model discloses a milling forming groove cutter which comprises a cutter handle and a cutting part, the cutting part and the cutter handle are of a cylindrical structure integrally formed and manufactured, the cutting part is provided with a plurality of cutting edges, each cutting edge comprises a side edge and an end edge, the side edge is of a spiral structure and is located on the side face of the cutting part, and the end edge is located on the side face of the cutting part. The end edge is of a linear structure and is located on the end face of the cutting part. The number of the cutting edges is four, the four cutting edges are the first cutting edge, the second cutting edge, the third cutting edge and the fourth cutting edge respectively, and the angle between the first cutting edge and the second cutting edge and the angle between the third cutting edge and the fourth cutting edge are both 97.5 degrees. The angle between the second cutting edge and the third cutting edge and the angle between the fourth cutting edge and the first cutting edge are both 82.5 degrees; the distribution of cutting force and the participation sequence of the four cutting edges are improved, so that the cutter is more difficult to wear and break.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling cutters, in particular to a milling groove forming cutter. BACKGROUND

[0002] The milling groove forming cutter is a kind of milling cutter used for grooving or cutting groove on the surface of workpiece. The milling groove forming cutter is suitable for cutting straight or curved groove, and is often used for manufacturing grooves of various shapes, such as T-shaped groove, square groove, V-shaped groove, etc. The milling groove forming cutter is usually used on milling machines, machining centers and other machine tools.

[0003] The existing milling groove forming cutter has the problems of large work hardening, adhesion of chips and cutter, large cutting force, serious cutter wear and poor chip removal when processing titanium alloy and aluminum alloy composite materials, which easily causes the cutter to break. In order to solve the above problems, the milling groove forming cutter needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a milling groove forming cutter, which aims to solve the problem that the existing milling groove forming cutter is easy to break during processing.

[0005] To achieve the above purpose, the milling groove forming cutter provided by the present application comprises a cutter handle and a cutting part, the cutting part and the cutter handle are integrally formed into a cylindrical structure, the cutting part is provided with a plurality of cutting edges, the cutting edges include side edges and end edges, the side edges are spiral structures and located on the side surface of the cutting part, and the end edges are linear structures and located on the end surface of the cutting part.

[0006] The number of cutting edges is 4, the four cutting edges are respectively first cutting edge, second cutting edge, third cutting edge and fourth cutting edge, the angle between the first cutting edge and the second cutting edge and the angle between the third cutting edge and the fourth cutting edge are both 97.5°, and the angle between the second cutting edge and the third cutting edge and the angle between the fourth cutting edge and the first cutting edge are both 82.5°.

[0007] Optionally, a spiral chip pocket is formed between the plurality of side edges, the cross section of the chip pocket is an arc structure, and the cross section of the chip pocket is composed of an arc structure with a radius of 0.5mm and an arc structure with a radius of 2.0mm.

[0008] Optionally, the angle of the spiral angle of the side edge is 40°.

[0009] Optionally, the rake angle of the side edge is 6°, and the angle of the circular arc relief angle of the side edge is 12°.

[0010] Optionally, the intersection of the side edge and the end edge is a tool tip, and the tool tip is a circular arc structure.

[0011] Optionally, the rake angle of the end edge is 6 degrees, the first relief angle of the end edge is 9°, and the second relief angle of the end edge is 20°.

[0012] Optionally, the length of the tool is 59-61 mm, the length of the cutting part is 17.5-18 mm, the diameter of the tool handle is 7.993-7.998 mm, the diameter at the end edge is 5.99-6.01 mm, and the core diameter in the middle of the cutting edge is 3.66-3.74 mm.

[0013] Optionally, the edge length of the side edge is 10-10.5 mm, the edge width of the side edge is 0.95-1.05 mm, the edge length of the end edge is 1.85-1.95 mm, and the width of the first relief angle of the end edge is 0.56-0.6 mm.

[0014] Optionally, the secondary offset angle of the tool is 2°.

[0015] Optionally, the surface roughness requirement of the tool handle side surface is 0.2 microns, and the circular runout tolerance of the cutting part relative to the tool handle side surface is 0.005 mm.

[0016] The technical scheme of the present application divides the cutting edge into first, second, third and fourth cutting edges, the angles between the first and second cutting edges and the third and fourth cutting edges are both 97.5°, and the angles between the second and third cutting edges and the fourth and first cutting edges are both 82.5°, so as to improve the distribution of cutting force and the participation sequence of the four cutting edges, thereby suppressing chatter during machining, improving machining stability and workpiece surface quality, and making the tool less likely to wear and break. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a front view structural schematic diagram of the milling groove forming tool of the present application;

[0019] Figure 2 is one of the bottom view structural schematic diagrams of the milling groove forming tool of the present application;

[0020] Figure 3 Fig. 2 is a schematic view of a bottom structure of the milling groove cutter according to the present application;

[0021] Figure 4 Fig. 3 is a schematic view of a cross-sectional structure along line A-A in the milling groove cutter according to the present application; Figure 1

[0022] Figure 5 Fig. 4 is a schematic view of a cross-sectional structure along line B-B in the milling groove cutter according to the present application. Figure 2

[0023] BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 1, shank; 2, cutting portion; 201, side edge; 202, end edge; 203, tip; 3, chip pocket; a, length of the cutter; b, length of the cutting portion; c, length of the side edge; d, diameter of the shank; e, diameter at the end edge; f, angle of the minor flank angle; g, length of the end edge; h, angle between the first cutting edge and the second cutting edge; i, angle between the second cutting edge and the third cutting edge; j, angle between the third cutting edge and the fourth cutting edge; k, angle between the fourth cutting edge and the first cutting edge; 1, width of the side edge; m, angle of the round nose of the side edge; n, core diameter of the cutting edge; o, angle of the rake angle of the end edge; p, width of the first relief angle of the end edge; q, angle of the first relief angle of the end edge; r, angle of the second relief angle of the end edge; s, angle of the rake angle of the side edge.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be apparently and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the protection scope of the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] ​​It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0030] It should be understood that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0031] The milling groove forming tool is a milling tool used for grooving or cutting grooves on the surface of a workpiece. The milling groove forming tool is suitable for cutting straight or curved grooves, and is often used for manufacturing various shaped grooves, such as T-shaped grooves, square grooves, V-shaped grooves, etc. The milling groove forming tool is usually used on milling machines, machining centers and other machine tools.

[0032] The existing milling groove forming tool has the problems of large work hardening, adhesion of chips and tool, large cutting force, serious tool wear and poor chip removal when machining titanium alloy and aluminum alloy composite materials, which easily causes the tool to break. In order to solve the above problems, the milling groove forming tool needs to be improved.

[0033] Therefore, the present application provides a milling groove forming tool.

[0034] In the embodiments of the present application, referenceFigures 1 to 5 The milling groove forming tool comprises a shank 1 and a cutting part 2, the cutting part 2 is integrally formed with the shank 1 in a cylindrical structure, the cutting part 2 is provided with a plurality of cutting edges, the cutting edges comprise side edges 201 and end edges 202, the side edges 201 are in a spiral structure and located on the side surface of the cutting part 2, and the end edges 202 are in a linear structure and located on the end surface of the cutting part 2; the number of the cutting edges is four, the four cutting edges are respectively a first cutting edge, a second cutting edge, a third cutting edge and a fourth cutting edge, the angle h between the first cutting edge and the second cutting edge and the angle j between the third cutting edge and the fourth cutting edge are both 97.5°, and the angle i between the second cutting edge and the third cutting edge and the angle k between the fourth cutting edge and the first cutting edge are both 82.5°, so as to improve the distribution of cutting force and the participation sequence of the four cutting edges, thereby inhibiting the chatter in the machining process, improving the machining stability and the workpiece surface quality, and making the tool less likely to wear and break.

[0035] Reference Figure 4 A spiral chip pocket 3 is formed between the plurality of side edges 201, the cross section of the chip pocket 3 is in an arc structure, the cross section of the chip pocket is in an arc structure composed of a circular arc with a radius of 0.5 mm and a circular arc with a radius of 2.0 mm, the arc chip pocket can increase the chip space, prevent chip jamming, and make the chip more easily curl and discharge in the arc chip pocket, thereby reducing chip jamming, reducing cutting resistance, improving tool life, increasing heat dissipation and chip space, and ensuring the rigidity of the tool and the smoothness of chip discharge.

[0036] Reference Figure 1 The angle of the helix angle of the side edge 201 is 40°, which can increase the cutting force and upward force of the tool, help to improve chip discharge and machining quality, and also help to improve the durability and machining efficiency of the tool, the contact area of the side edge 201 with the workpiece is increased by increasing the angle of the helix angle, so that the cutting force is uniformly distributed on the cutting edge, thereby reducing the cutting force, which can also improve the service life and machining efficiency of the tool.

[0037] Reference Figure 4 The rake angle s of the side edge 201 is 6°, and the circular arc relief angle m of the side edge 201 is 12°, which can reduce the friction between the tool and the workpiece, reduce the wear rate, and improve the service life and sharpness of the tool; since the material of the workpiece to be machined is mainly titanium alloy + aluminum alloy, the tool cannot be too sharp, and the material also has aluminum alloy, so it cannot be too blunt, therefore, the rake angle of the side edge 201 is 6°, and the circular arc relief angle is 12°.

[0038] Reference Figure 1The intersection of the side edge 201 and the end edge 202 is a tool tip 203, which is in a circular arc structure. The arc-shaped tool tip can reduce tangential force and radial force in machining, thereby reducing frictional resistance of the tool, reducing vibration between the tool and the workpiece, reducing tool wear, and improving machining efficiency. In addition, the arc-shaped tool tip can also reduce the shear stress of the material during machining, reduce the cutting force before machining, and further reduce the deformation of the workpiece.

[0039] With reference to Figure 5 The rake angle of the end edge 202 is 6 degrees, the first relief angle of the end edge 202 is 9 degrees, and the second relief angle of the end edge 202 is 20 degrees. The 6-degree rake angle helps to smoothly discharge the chips, reduces the friction between the chips and the front of the tool, and can ensure that the cutting edge has a certain strength and is not prone to breaking. The first relief angle of 9 degrees can reduce the friction between the rear of the tool and the machined surface of the workpiece. During the milling process, excessive friction between the rear of the tool and the workpiece can be avoided to generate high temperature, thereby reducing the wear of the tool. The second relief angle of 20 degrees is larger than the first relief angle, which can provide more space for the chips, making the chips more easily curled and discharged.

[0040] With reference to Figure 1 The length a of the tool is 59-61 mm, the length b of the cutting part 2 is 17.5-18 mm, the diameter d of the tool handle 1 is 7.993-7.998 mm, the diameter e at the end edge 202 is 5.99-6.01 mm, and the core diameter n in the middle of the cutting edge is 3.66-3.74 mm. The appropriate length and diameter can ensure that the tool has good strength and reduce the possibility of tool breakage.

[0041] With reference to Figure 1 The edge length u of the side edge 201 is 10-10.5 mm, the edge width l of the side edge 201 is 0.95-1.05 mm, the edge length g of the end edge 202 is 1.85-1.95 mm, and the width p of the first relief angle of the end edge 202 is 0.56-0.6 mm. The appropriate edge length range makes the milling cutter adapt to milling within a certain depth range, and the relatively moderate edge length helps to maintain the stability of the milling cutter during machining. The edge width determines the amount of material removed each time, which can control the cutting force while ensuring a certain cutting efficiency. The edge length of 1.85-1.95 mm can effectively cut off the material to form a smooth plane. The appropriate first relief angle width can effectively reduce the friction between the rear of the tool end edge 202 and the machined surface of the workpiece, and improve the surface machining quality.

[0042] With reference to Figure 1, the angle f of the minor flank angle of the tool is 2°, the friction and extrusion between the minor cutting edge of the tool and the machined surface is relatively small, which can effectively reduce the residual area height of the machined surface, so that the machined surface is smoother, a lower surface roughness value is obtained, the small minor flank angle can avoid excessive scratching of the machined surface by the minor cutting edge, and the minor flank angle of 2° provides a relatively smooth channel for the outflow of the chip, so that the chip can be easily discharged from between the tool and the workpiece.

[0043] Reference Figure 1 , the surface roughness requirement of the side surface of the tool shank 1 is 0.2 microns, and the circular runout tolerance of the cutting part 2 relative to the side surface of the tool shank 1 is 0.005 mm. During the connection with the main shaft of the machine tool, the higher roughness requirement can realize closer and more accurate fitting, which helps to improve the overall dynamic balance performance of the tool system; the accurate circular runout tolerance can ensure the position accuracy of the cutting edge during rotation, which helps to improve the machining surface quality and also reduces the vibration of the tool during cutting.

[0044] The technical scheme of the present application divides the cutting edge into a first cutting edge, a second cutting edge, a third cutting edge and a fourth cutting edge, wherein the angles between the first cutting edge and the second cutting edge and between the third cutting edge and the fourth cutting edge are both 97.5°, and the angles between the second cutting edge and the third cutting edge and between the fourth cutting edge and the first cutting edge are both 82.5°, so as to improve the distribution of cutting force and the participation sequence of the four cutting edges, thereby suppressing the chatter during machining, improving the machining stability and the workpiece surface quality, and making the tool less likely to wear and break.

[0045] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A slot milling cutter of the type comprising a body (2) and a plurality of cutting inserts (3) mounted on the body (2) and defining a plurality of cutting edges (4), characterized in that, It includes: The handle and the cutting part, the cutting part is made of cylindrical structure, the cutting part is provided with a plurality of cutting edges, the cutting edge includes side edge and end edge, the side edge is spiral structure and located in the side of cutting part, the end edge is linear structure and located in the end surface of cutting part; The number of cutting edges is 4, the first cutting edge, the second cutting edge, the third cutting edge and the fourth cutting edge, the angle between the first cutting edge and the second cutting edge and the angle between the third cutting edge and the fourth cutting edge are 97.5°, the angle between the second cutting edge and the third cutting edge and the angle between the fourth cutting edge and the first cutting edge are 82.5°.

2. A slot milling cutter according to claim 1, wherein, A plurality of spiral flutes are formed between the side edges, the cross section of the flute is arc structure, the cross section of the flute is arc structure composed of a circular arc with a radius of 0.5mm and a circular arc with a radius of 2.0mm.

3. The grooving cutter of claim 1 wherein, The angle of the spiral angle of the side edge is 40°.

4. The grooving cutter of claim 1 wherein, The rake angle of the side edge is 6°, and the circular arc relief angle of the side edge is 12°.

5. The grooving cutter of claim 1 wherein, The intersection of the side edge and the end edge is the tool tip, which is arc structure.

6. The grooving cutter of claim 1 wherein, The rake angle of the end edge is 6°, the first relief angle of the end edge is 9°, and the second relief angle of the end edge is 20°.

7. A slot milling cutter according to claim 6, wherein, The length of the tool is 59-61mm, the length of the cutting part is 17.5-18mm, the diameter of the handle is 7.993-7.998mm, the diameter of the end edge is 5.99-6.01mm, and the core diameter of the cutting edge is 3.66-3.74mm.

8. A slot milling cutter according to claim 7, wherein, The length of the side edge is 10-10.5mm, the width of the side edge is 0.95-1.05mm, the length of the end edge is 1.85-1.95mm, and the width of the first relief angle of the end edge is 0.56-0.6mm.

9. The grooving cutter of claim 1 wherein, The minor offset angle of the tool is 2°.

10. The grooving cutter of claim 1 wherein, The surface roughness of the side surface of the handle is 0.2 microns, and the circular runout tolerance of the cutting part relative to the side surface of the handle is 0.005mm.

Images