Face milling cutter disc for layered cutting

Abstract

The utility model relates to the field of milling cutters, in particular to a face milling cutter disc for layered cutting, and aims to solve the technical problems that burrs are easy to locally exist on the surface of a workpiece machined by the face milling cutter disc and the overall smoothness of a machined plane is poor when the face milling cutter disc is broken. The face milling cutter disc with the layered cutting function comprises a cutter disc base body, and cutter teeth distributed in the circumferential direction are arranged on the cutter disc base body. The blade lengths of the cutter teeth distributed in the circumferential direction are gradually decreased in the cutting direction, so that the cutter teeth distributed in the circumferential direction have the radial cutting depth gradually decreased in the cutting direction. The blade depth of the cutter teeth distributed in the circumferential direction is gradually increased in the cutting direction corresponding to the blade length change, so that the cutter teeth distributed in the circumferential direction have the axial cutting depth gradually increased in the cutting direction.

Description

Technical Field

[0001] The utility model belongs to the field of milling cutters, and in particular relates to a face milling cutter disc for layered cutting. Background Art

[0002] The face milling cutter is one of the more commonly used tools in the field of mechanical processing, and is mainly used to process the plane of the surface of the formed workpiece. Due to its large feed rate during processing, cutting can be performed through the blades on multiple teeth, so it has high production efficiency and good stability. The teeth of the existing face milling cutter are basically evenly distributed on the body of the face milling cutter along the axial direction, and the position and orientation of the blades on the teeth are basically the same, so that each tooth has the same cutting ability. During cutting, the axial and radial cutting depths of each tooth are basically the same. When the blade of any of the middle teeth is chipped, the milling ability of the face milling cutter will be affected, which may easily cause burrs on the surface of the workpiece and poor overall finish of the processed surface. Utility Model Content

[0003] The utility model aims to provide a face milling cutter disc for layered cutting, so as to solve the technical problem that when the face milling cutter disc is chipped, the surface of the workpiece processed by the face milling cutter disc is prone to local burrs and the overall smoothness of the processed plane is poor.

[0004] The following technical solutions are adopted in this utility model:

[0005] A face milling cutter disc for layered cutting comprises a cutter disc base body, on which are arranged cutter teeth distributed along the circumferential direction; the blade length of the cutter teeth distributed along the circumferential direction varies gradually in a cutting direction, so that the cutter teeth distributed along the circumferential direction have a radial cutting depth that decreases along the cutting direction; the blade depth of the cutter teeth distributed along the circumferential direction varies gradually in a cutting direction corresponding to the blade length variation, so that the cutter teeth distributed along the circumferential direction have an axial cutting depth that increases along the cutting direction.

[0006] Furthermore, the cutter teeth include a tooth root fixed on a cutter disc base and a blade fixedly mounted on the tooth root; the blade is used for processing the cutting edge on a side facing the workpiece.

[0007] Furthermore, the blade is a polycrystalline diamond composite blade.

[0008] Furthermore, the tooth root is integrally formed with the cutter disc base; and the blade is fixedly mounted on the tooth root by welding or fastener connection.

[0009] Furthermore, the installation positions of the blades on the corresponding tooth roots are the same.

[0010] Furthermore, the cutter teeth are integrally formed with the cutter disc base, and the cutter teeth are used to process a cutting edge on a side facing the workpiece.

[0011] Furthermore, an internal cooling channel is provided in the cutter disc base.

[0012] Furthermore, the liquid outlet of the inner cooling channel is arranged between the blade teeth distributed along the circumferential direction.

[0013] Furthermore, the decreasing difference of the blade length of the cutting teeth is maintained between 0.02-0.15 mm.

[0014] Furthermore, the decreasing difference of the blade depth of the cutting teeth is maintained between 0.03-0.1 mm.

[0015] Beneficial effects: The utility model improves the existing face milling cutter disc, and specifically proposes a face milling cutter disc for layered cutting. The face milling cutter disc for layered cutting described in the utility model includes a cutter disc base, and the cutter disc base is provided with cutter teeth distributed along the circumferential direction. Compared with the existing face milling cutter disc, the key of the utility model is that the blade length of the cutter teeth distributed along the circumferential direction changes gradually along the cutting direction, so that the cutter teeth distributed along the circumferential direction have a radial cutting depth that decreases along the cutting direction; the blade depth of the cutter teeth distributed along the circumferential direction changes gradually along the cutting direction corresponding to the blade length change, so that the cutter teeth distributed along the circumferential direction have an axial cutting depth that increases along the cutting direction. That is to say, except for the cutter tooth with the longest blade length and the shallowest blade depth, the blade length of any cutter tooth is less than the previous cutter tooth that performs milling operation before it, and the blade depth is greater than the previous cutter tooth that performs milling operation before it. In this way, during milling, except for the cutter teeth with the longest blade length and the shallowest blade depth, the remaining cutter teeth are further axially milled and radially milled on the basis of the milling of the previous cutter teeth. Therefore, the amount of milling and the cutting force on each cutter tooth are relatively small, and it is not easy to wear and chipping. Therefore, when the feed rate is the same, the face milling cutter disc with the above structure can perform deeper milling. In addition, except for the cutter teeth with the shortest blade length and the deepest blade depth, the chipping of other cutter teeth will not affect the milling effect of the next cutter tooth, so milling can be continued without changing the tool. Therefore, such a setting also greatly guarantees the milling effect and the durability of the cutter disc base. When the blade of the cutter tooth is chipped, the milling ability of the face milling cutter disc will not be affected, and burrs will not appear on the local surface of the workpiece processed by the face milling cutter disc, so that the overall smoothness of the processed surface can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the face milling cutter disc of the utility model;

[0017] Figure 2 for Figure 1 Side view of

[0018] Figure 3 This is a size comparison chart of 10 blades of different specifications stacked together;

[0019] The names of the components corresponding to the corresponding reference numerals in the figure are: 1. cutter disc base; 2. cutter teeth; 3. cutting edge; 4. positioning and mounting groove; 5. mounting cavity; 6. tooth root; 7. blade; 8. internal cooling channel; 9. liquid outlet; 10. chip removal groove. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] The principle of the layered cutting face milling cutter disc described in the utility model is as follows:

[0022] A face milling cutter disc for layered cutting, the structure of which can be referred to Figure 1 , Figure 2 As shown, it includes a cutter disc base 1, on which teeth 2 distributed along the circumferential direction are arranged. Compared with the existing face milling cutter disc, the key of the utility model is that the blade length of the teeth 2 distributed along the circumferential direction changes gradually along the cutting direction, so that the teeth 2 distributed along the circumferential direction have a radial cutting depth that decreases along the cutting direction; the blade depth of the teeth 2 distributed along the circumferential direction changes gradually along the cutting direction corresponding to the blade length change, so that the teeth 2 distributed along the circumferential direction have an axial cutting depth that increases along the cutting direction. That is to say, except for the tooth 2 with the longest blade length and the shallowest blade depth, the length of the blade 3 of any tooth 2 is less than the previous tooth 2 that performs milling operation before it, and the blade depth is greater than the previous tooth 2 that performs milling operation before it. In this way, during milling, except for the tooth 2 with the longest blade length and the shallowest blade depth, the remaining teeth 2 are further axially milled and radially milled on the basis of the milling of the previous tooth 2.

[0023] Therefore, the amount of milling and the cutting force on each tooth 2 are relatively small, and wear and chipping are not likely to occur. Therefore, when the feed rate is the same, the face milling cutter disc using the above structure can perform deeper milling. In addition, except for the tooth 2 with the shortest blade length and the deepest blade depth, chipping of other teeth 2 will not affect the milling effect of the next tooth 2, so milling can continue without changing the tool. Therefore, such a setting also greatly guarantees the milling effect and the durability of the cutter disc base 1. When the blade 3 of the tooth 2 is chipped, the milling ability of the face milling cutter disc will not be affected, and burrs will not appear on the local surface of the workpiece processed by the face milling cutter disc, thereby ensuring a better overall smoothness of the processed surface.

[0024] Based on the principle of the above scheme, the embodiment 1 of the face milling cutter disc for layered cutting of the utility model is:

[0025] A face milling cutter disc for layered cutting, the structure of which can be referred to Figure 1 , Figure 2As shown, it includes a cutter disc base 1. In this embodiment, the cutter disc base 1 is a columnar structure, and a positioning installation groove 4 is provided on the side facing the mounting handle of the machine tool, and a mounting cavity 5 is provided at the center, so that the face milling cutter disc can be directly installed on the mounting handle of the machine tool. The cutter disc base 1 is provided with teeth 2 distributed along the circumferential direction, and the intervals between the teeth 2 form a chip groove 10 for chip removal. In order to facilitate cutting and chip removal, the teeth 2 and the chip groove 10 are inclined relative to the axial direction of the face milling cutter disc in the milling direction, so that the end of the teeth 2 facing the workpiece can first contact the surface to be processed of the workpiece, and at the same time, the chip groove 10 can timely discharge the waste chips generated during milling.

[0026] The blade length of the circumferentially distributed teeth 2 changes in decreasing direction along the cutting direction, so that the circumferentially distributed teeth 2 have a radial cutting depth that decreases along the cutting direction; the blade depth of the circumferentially distributed teeth 2 changes in increasing direction along the cutting direction corresponding to the blade length change, so that the circumferentially distributed teeth 2 have an axial cutting depth that increases along the cutting direction. In other words, except for the tooth 2 with the longest blade length and the shallowest blade depth, the blade 3 of any tooth 2 is shorter than the previous tooth 2 that performs milling operation before it, and the blade depth is greater than the previous tooth 2 that performs milling operation before it. In this way, during milling, except for the tooth 2 with the longest blade length and the shallowest blade depth, the remaining teeth 2 are further axially milled and radially milled on the basis of the milling of the previous tooth 2.

[0027] The key point of this embodiment is that the cutter teeth 2 include a tooth root 6 fixed on the cutter disc base 1 and a blade 7 fixedly mounted on the tooth root 6. The aforementioned cutting edge 3 is arranged on the side of the blade 7 facing the workpiece. Such an arrangement allows the blade 7 to be made of a harder material suitable for milling, while the tooth root 6 and the cutter disc base 1 can be made of a relatively low-priced material. Therefore, the above arrangement effectively reduces the processing cost of the face milling cutter disc, while also avoiding material waste. The blade 7 preferably uses a polycrystalline diamond composite blade, so that the workpiece processed by the face milling cutter disc has the advantages of high precision and good finish. Of course, in other milling scenarios, the material of the blade 7 can also be hard tool alloy steel.

[0028] The tooth root 6 and the cutter disc base 1 are preferably obtained by an integral molding process, and the material thereof can be selected from relatively cheap materials such as carbon steel. On this basis, the blade 7 can be fixedly mounted on the tooth root 6 by welding or fastener connection. Since the tooth root 6 and the cutter disc are integrally formed, there is a strong structural rigidity between the tooth root 6 and the cutter disc; the blade 7 is fixedly mounted on the tooth root 6 by welding or fastener connection, so that there is also a strong connection strength between the blade 7 and the tooth root 6. Therefore, the above-mentioned arrangement enables the blade 7, the tooth root 6 and the cutter disc base 1 to be reliably integrated together, so that it itself has good structural strength and structural rigidity for milling operations.

[0029] In this embodiment, 10 teeth 2 may be specifically provided on the cutter disc base 1. Correspondingly, 10 blades 7 are mounted on the teeth 2. For the sake of distinction, the 10 blades 7 are respectively named Z1, Z1, Z3, Z4, Z5, Z6, Z7, Z8, Z9, and Z10. Among them, Z1 is the blade with the longest blade length and the shallowest blade depth; Z2 is the blade with the blade length second only to Z1 and the blade depth only greater than Z1. Similarly, Z10 is the blade with the shortest blade length and the deepest blade depth. For the convenience of comparing sizes, please refer to Figure 3 As shown, Z1~Z10 are stacked together. Z10 is at the bottom layer, and Z1 is at the top layer. The blade length of Z1 is Figure 3 The dimension α shown in the figure is the blade depth. Figure 3 β shown in the figure. The blade length of Z2 is shorter than that of Z1, and the difference is δ in the figure. The blade length of Z3 is shorter than that of Z2, the blade length of Z4 is shorter than that of Z3, and so on. The blade length of Z10 is shorter than that of Z9. The blade depth of Z2 is greater than that of Z1, and the difference is ζ in the figure; the blade depth of Z3 is greater than that of Z2, the blade depth of Z4 is greater than that of Z3, and so on. The blade depth of Z10 is greater than that of Z9. The value of δ is preferably maintained between 0.02-0.15 mm, and the value of ζ is preferably maintained between 0.03-0.1 mm.

[0030] The installation positions of the blades 7 on the corresponding tooth roots 6 are the same. With this arrangement, the blades 7 can be installed on the cutter head base 1 in the form of blanks of the same specifications, and after being fixed and installed, each blank is processed with the same positioning reference, so that the position accuracy between the blades 7 formed by the blanks can be maximized as much as possible, so as to avoid the position accuracy between the blades 7 being affected by the installation error.

[0031] Of course, the cutter teeth 2 can also be formed integrally with the cutter disc base 1. The cutter teeth 2 are machined with a cutting edge 3 on the side facing the workpiece so as to mill the workpiece surface in the aforementioned manner. This can reduce the number of components on the face milling cutter disc while ensuring the structural rigidity and strength of the face milling cutter disc. In order to ensure the hardness of the face milling cutter disc, the cutter teeth 2 and the cutter disc base 1 are both made of hard tool alloy steel.

[0032] Based on the above-mentioned principle and embodiment 1, embodiment 2 of the face milling cutter disc for layered cutting of the utility model is as follows:

[0033] Compared with Example 1, the key point of this embodiment is that an internal cooling channel 8 is provided in the cutter disc base 1. This can ensure that the coolant can cool the face milling cutter disc in time, and there is no need to lead another pipeline from the outside of the tool. Therefore, the above arrangement effectively saves space on the face milling cutter disc while ensuring the cooling effect. The liquid outlet 9 of the internal cooling channel 8 can be arranged between the teeth 2 distributed along the circumferential direction. On the one hand, the coolant can cool the cutting edge 3 performing the cutting operation in time, and on the other hand, the coolant can also be used to flush away the accumulated chips in the chip removal groove 10, thereby improving the chip removal efficiency.

[0034] Other parts not emphasized in this embodiment are consistent with those in Embodiment 1.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A face milling cutter disc for layered cutting, comprising a cutter disc base body, on which cutter teeth distributed in the circumferential direction are arranged; characterized in that: The blade length of the circumferentially distributed teeth changes gradually along the cutting direction, so that the circumferentially distributed teeth have a radial cutting depth that decreases along the cutting direction; the blade depth of the circumferentially distributed teeth changes gradually along the cutting direction corresponding to the blade length change, so that the circumferentially distributed teeth have an axial cutting depth that increases along the cutting direction.

2. The face milling cutter disc for layered cutting according to claim 1, characterized in that: The cutter teeth include a tooth root fixed on a cutter disc base and a blade fixedly mounted on the tooth root; the blade is used for processing a cutting edge on a side facing a workpiece.

3. The face milling cutter disc for layered cutting according to claim 2, characterized in that: The blade is a polycrystalline diamond composite blade.

4. The face milling cutter disc for layered cutting according to claim 2 or 3, characterized in that: The tooth root is integrally formed with the cutter disc base; the blade is fixedly mounted on the tooth root by welding or fastener connection.

5. The face milling cutter disc for layered cutting according to claim 4, characterized in that: The installation positions of the blades on the corresponding tooth roots are the same.

6. The face milling cutter disc for layered cutting according to claim 2, characterized in that: The cutter teeth are integrally formed with the cutter disc base, and the cutter teeth are used for processing the cutting edge on the side facing the workpiece.

7. The face milling cutter disc for layered cutting according to claim 1, characterized in that: An internal cooling channel is arranged in the cutter disc base.

8. The face milling cutter disc for layered cutting according to claim 7, characterized in that: The liquid outlet of the inner cooling channel is arranged between the blade teeth distributed along the circumferential direction.

9. The face milling cutter disc for layered cutting according to claim 1, characterized in that: The decreasing difference of the blade length of the blade teeth is maintained between 0.02-0.15mm.

10. The face milling cutter disc for layered cutting according to claim 1, characterized in that: The decreasing difference of the blade depth of the blade teeth is maintained between 0.03-0.1mm.

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