Plane milling cutter
By designing a plane milling cutter with a conical table cutting edge portion and acute angle, and using the ring side as the cutting surface, the problem of difficulty in forming large arc-shaped cutting grooves in the prior art is solved, and efficient and low-cost workpiece cutting effect is achieved .
Patent Information
- Application Number
- CN202420662060.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Existing planar milling cutters are difficult to form large arc-shaped cutting grooves close to the plane, resulting in insufficient cutting flatness of the workpiece and slow processing speed. The use of large-sized circular inserts will lead to increased costs and reduced service life.
Design a planar milling cutter with a conical blade having a meter-shaped cutting edge, including a circular bottom surface and a ring side surface. The ring side surface is used as the cutting surface, and the angle design of the acute angle is adjusted to control the depth of the cutting arc groove. , realize the cutting of large arc-shaped cutting grooves with small size inserts.
The workpiece has good cutting flatness, fast processing speed, low cost and long service life. The large arc-shaped cutting grooves are cut through small-sized inserts, and the depth of the cutting arc grooves can be adjusted according to requirements.
Smart Images
Figure CN222199041U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of metal surface processing, in particular to a plane milling cutter. Background Art
[0002] A face milling cutter is a cutting tool used to machine flat surfaces, steps or profiled surfaces. Figure 1A As shown, the surface milling cutter is composed of a large diameter cutter disc 11 and a plurality of blades 12 correspondingly arranged on the cutter disc 11, wherein the blades 12 can be generally classified as follows: Figure 1A The blades shown are square blades, or square blades with rounded corners, or polygonal blades, or polygonal blades with rounded corners, or circular blades.
[0003] Among them, various square blades, whether in a vertical manner (such as Figure 1A ) or cutting the surface 131 of the workpiece 13 in a horizontal manner, it is impossible to form a cutting groove that is large arc-shaped and close to a plane, thereby causing the workpiece 13 to have insufficient cutting flatness and too slow a processing speed.
[0004] Also, see Figure 1B As shown, currently the circular blade 14 cuts the surface 131 of the workpiece 13 in a vertical manner, that is, it cuts with the circular cutting surface 141, but this often results in an overly deep arc-shaped cutting groove on the workpiece 13 and unsatisfactory surface roughness.
[0005] For example, Figure 1C The circular blade 14 with a diameter of 20 mm is used for cutting, creating a circular arc cutting groove 132 with a groove width of 6 mm and a groove depth D1 of 0.46 mm (the groove depth is deliberately exaggerated here for easy understanding). However, such a groove depth cannot meet the industry's requirements for the plane accuracy of the workpiece 13, which is usually 0.01-0.03 mm. In order to achieve this accuracy, Figure 1D As shown, a circular blade 14 with a diameter of 454.41 mm is required to cut a circular arc-shaped cutting groove 133 with a groove width of 6 mm and a groove depth D2 of only 0.01 mm (the groove depth is deliberately exaggerated here for easy understanding). It can be seen from this that if a large circular arc-shaped cutting groove close to a plane is to be formed, the size of the circular blade required will be too large, and the size of the cutter head required will also be larger, which is obviously impractical and no one uses it because it will increase costs and reduce service life. Utility Model Content
[0006] The purpose of the utility model is to provide a plane milling cutter, mainly to solve one or more of the above problems.
[0007] To achieve the above-mentioned purpose, the utility model is a plane milling cutter suitable for cutting the surface of a workpiece. The plane milling cutter comprises: a cutter disc; and a blade, which is assembled on the cutter disc and has a frustum-shaped cutting edge portion, the cutting edge portion has a circular bottom surface and an annular side surface connected to the periphery of the bottom surface, and the blade uses the annular side surface as a cutting surface for cutting the surface of the workpiece.
[0008] The utility model has the advantages that: through the design of the blade using the side surface of the ring as the cutting surface for cutting the surface of the workpiece, the blade cuts the surface of the workpiece in a horizontal manner, so that the workpiece can be cut into a large arc-shaped and nearly flat cutting groove by a small-sized blade, and the utility model has the advantages of good workpiece cutting flatness, fast processing speed, low cost and long service life.
[0009] Preferably, the connection between the bottom surface of the blade and the side surface of the ring is a circular blade edge, and the blade edge has an arc section for contacting the surface of the workpiece.
[0010] Preferably, after the surface of the workpiece is cut by the blade, a cutting arc groove is formed, and the bottom surface of the blade and the surface of the workpiece have a clearance angle, and the groove depth of the cutting arc groove increases or decreases as the angle of the clearance angle increases or decreases. The depth of the cutting arc groove can be controlled by adjusting the clearance angle to obtain cutting arc grooves with different arc radii.
[0011] Preferably, the bottom surface faces the surface of the workpiece and forms an angle with the side surface of the ring, and the angle is an acute angle.
[0012] Preferably, the cutter disc includes an assembly portion; the blade is obliquely assembled in the assembly portion, and a portion of the blade portion is located outside the assembly portion.
[0013] In addition, in order to achieve the above-mentioned purpose, the utility model also provides a plane milling cutter suitable for cutting the surface of a workpiece, the plane milling cutter comprising: a cutter disc; a tool rod assembled on the cutter disc; and a blade assembled on the tool rod and having a frustum-shaped cutting edge portion, the cutting edge portion having a circular bottom surface and an annular side surface connected to the periphery of the bottom surface, the blade uses the annular side surface as a cutting surface for cutting the surface of the workpiece.
[0014] Preferably, the connection between the bottom surface of the blade and the side surface of the ring is a circular blade edge, and the blade edge has an arc section for contacting the surface of the workpiece.
[0015] Preferably, after the surface of the workpiece is cut by the blade, a cutting arc groove is formed, and the bottom surface of the blade and the surface of the workpiece have a clearance angle, and the groove depth of the cutting arc groove increases or decreases as the angle of the clearance angle increases or decreases. The depth of the cutting arc groove can be controlled by adjusting the clearance angle to obtain cutting arc grooves with different arc radii.
[0016] Preferably, the bottom surface faces the surface of the workpiece and forms an angle with the side surface of the ring, and the angle is an acute angle.
[0017] Preferably, the cutter disc includes a first end face, a second end face opposite to the first end face, and a plurality of assembly parts passing through the first end face and the second end face; the cutter bar is arranged in one of the assembly parts and has an assembly groove; the blade is inclinedly arranged in the assembly groove, and a part of the blade portion is located outside the assembly groove. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1A It is a schematic diagram of a traditional face milling cutter, showing the state of a square blade cutting the surface of a workpiece;
[0019] Figure 1B This is a schematic diagram of a conventional face milling cutter, showing the state where a circular blade cuts the workpiece surface in an upright manner;
[0020] Figure 1C It is a schematic diagram of the workpiece surface being cut vertically using a small-sized circular blade, showing the state where the workpiece surface does not meet the requirements;
[0021] Figure 1D It is a schematic diagram of the workpiece surface being cut vertically using a large-size circular blade, showing the state in which the workpiece surface meets the requirements;
[0022] Figure 2 It is a three-dimensional combination diagram of the first embodiment of the utility model;
[0023] Figure 3 It is a three-dimensional exploded view of the first embodiment of the utility model;
[0024] Figure 4 It is a three-dimensional exploded view of the first embodiment of the utility model, showing the state where the knife bar and the blade are exploded;
[0025] Figure 5 It is a combined cross-sectional view of the first embodiment of the utility model, showing the state of the combined cross-sectional view of the knife bar and the blade;
[0026] Figure 6 yes Figure 2 Section view of line segment 6-6;
[0027] Fig. 7A This is a schematic diagram of the milling operation of the first embodiment of the utility model (I),
[0028] Figure 7B This is a schematic diagram of the milling operation of the first embodiment of the utility model (II);
[0029] Figure 7CSchematic diagram (III) of the milling operation of the first embodiment of the utility model, showing the first depth state of the cutting groove on the workpiece when cutting at the first clearance angle;
[0030] Fig.7D Schematic diagram (IV) of the milling operation of the first embodiment of the utility model, showing the second depth state of the cutting groove on the workpiece when cutting at the second clearance angle;
[0031] Figure 8 is a perspective exploded view of the second embodiment of the utility model; and
[0032] Fig. 9 It is a cross-sectional view of the second embodiment of the utility model.
[0033] Explanation of figure numbers: 11, cutter disc; 12, blade; 13, workpiece; 131, surface; 132, cutting groove; 133, cutting groove; D1, D2, groove depth; 20, cutter disc; 21, first end face; 22, second end face; 23, 24, assembly part; 30, tool rod; 31, tool rod end face; 32, assembly groove; 33, thread groove; 40, blade; 41, blade part; 411, bottom surface; 412, ring side surface; 413, blade edge; 4131, arc segment; A1, angle; A2, clearance angle; 50, screw; 90, workpiece; 91, surface; 911, cutting arc groove; D3, D4, groove depth. DETAILED DESCRIPTION
[0034] See also Figures 2 to 6 As shown, a surface milling cutter provided in an embodiment of the utility model is suitable for cutting a surface 91 of a workpiece 90. The surface milling cutter is mainly composed of a cutter disc 20, a cutter bar 30 and a blade 40, wherein:
[0035] The blade disc 20 includes a first end surface 21 , a second end surface 22 opposite to the first end surface 21 , and six assembly portions 23 penetrating the first end surface 21 and the second end surface 22 .
[0036] The knife bar 30 is generally cylindrical and can be detachably assembled in one of the assembly parts 23 . The knife bar 30 has an assembly groove 32 that is inclined upward from the knife bar end surface 31 , and a thread groove 33 that is recessed in the groove bottom surface of the assembly groove 32 .
[0037] Related References Figure 4 , 57A, the blade 40 is penetrated by a screw 50 and screwed on the thread groove 33 of the tool bar 30, so that the blade 40 is inclinedly arranged in the assembly groove 32 of the tool bar 30. The blade 40 has a cutting edge portion 41 in the shape of a truncated cone and partially located outside the assembly groove 32, and the cutting edge portion 41 has a circular bottom surface 411 facing the surface 91 of the workpiece 90, an annular side surface 412 connected to the periphery of the bottom surface 411, and the bottom surface 411 and the annular side surface 412 form an acute angle A1, and a circular blade edge 413 formed by the connection between the bottom surface 411 and the annular side surface 412.
[0038] The utility model particularly uses the ring side surface 412 of the blade 40 as the cutting surface for cutting the surface 91 of the workpiece 90, and the blade edge 413 has an arc segment 4131 for contacting the surface 91 of the workpiece 90, and the bottom surface 411 of the blade 40 and the surface 91 of the workpiece 90 have a clearance angle A2, so that the surface 91 of the workpiece 90 is formed with a cutting arc groove 911 after being cut by the blade 40, and the groove depth of the cutting arc groove 911 increases or decreases with the increase or decrease of the angle of the clearance angle A2.
[0039] The above is the description of the main components of the first embodiment of the utility model. The operation mode and function of the utility model are described as follows:
[0040] See also Fig. 7A and 7B As shown, the blade 40 uses the ring side surface 412 as the cutting surface for cutting the surface 91 of the workpiece 90, so that the blade 40 cuts the surface 91 of the workpiece 90 in a horizontal manner, the feeding distance of the blade 40 is fixed, and the groove width of the cut arc groove 911 is 6 mm. When the clearance angle A2 is 2.9 degrees, the cut arc groove 911 with a groove depth D3 of 0.023 mm can be formed (as shown in FIG. Figure 7C , the groove depth is deliberately exaggerated here for easy understanding). When the clearance angle A2 is 1.2 degrees, a cutting arc groove 911 with a groove depth D4 of 0.01 mm can be formed (such as Fig.7D , the groove depth is intentionally exaggerated here for easy understanding), so that the cutting arc groove 911 is in the shape of a large arc and close to a plane. Accordingly, the blade size, clearance angle, groove width and groove depth of the utility model are compared with the conventional parameters as shown in Table 1. Through the design of the utility model, the workpiece 90 can be cut into a large arc and close to a plane cutting arc groove 911 with a small size blade 40, and the workpiece 90 has the advantages of good cutting flatness, fast processing speed, low cost and long service life.
[0041]
[0042] Table 1
[0043] In addition, the blade 40 of the present invention not only uses its annular side surface 412 as a cutting surface to cut the surface 91 of the workpiece 90, but also can accurately control the depth of the arc groove 911 cut on the workpiece 90 by adjusting the clearance angle A2. In this way, the surface 91 of the workpiece 90 with different precisions can be obtained according to actual needs.
[0044] It is worth mentioning that the blade 40 is designed with the ring side surface 412 as the cutting surface for cutting the surface 91 of the workpiece 90, and the bottom surface 411 of the blade 40 and the ring side surface 412 are designed to form an acute angle, and the acute angle is 83.72 degrees, but not limited to this. During the milling process of the plane milling cutter, the ring side surface 412 of the blade portion 41 is in acute-angle contact with the surface 91 of the workpiece 90, making it easier for the cutting edge 413 of the blade portion 41 to mill the surface 91 of the workpiece 90, effectively avoiding the vibration of the plane milling cutter during rotation processing due to assembly tolerance, thereby achieving the purpose of improving the milling quality.
[0045] See also Figure 8 and Fig. 9 As shown, the second embodiment of the utility model provides a plane milling cutter, which is different from the first embodiment in that:
[0046] The surface milling cutter is composed of a cutter disc 20 and a blade 40, wherein the cutter disc 20 includes an assembly portion 24; the blade 40 is obliquely assembled on the assembly portion 24, and a part of the blade portion 41 is located outside the assembly portion 24. The blade 40 also uses the ring side surface 412 as the cutting surface for cutting the workpiece surface, so that the blade 40 cuts the workpiece surface in a horizontal manner.
[0047] Thus, since the blade 40 is directly assembled to the cutter disc 20 in the second embodiment, compared to the first embodiment, the blade 40 does not need to be coupled to the cutter disc 20 through the cutter rod, thereby saving the cutter rod component and effectively reducing the assembly cost and parts cost.
Claims
1. A plane milling cutter, suitable for cutting the surface of a workpiece, characterized in that: The surface milling cutter comprises: a knife tray; and A blade is assembled on the cutter disc and has a truncated cone-shaped blade portion, wherein the blade portion has a circular bottom surface and an annular side surface connected to the periphery of the bottom surface, and the blade uses the annular side surface as a cutting surface for cutting the surface of the workpiece.
2. The surface milling cutter according to claim 1, characterized in that: The connection between the bottom surface of the blade and the side surface of the ring is a circular blade edge, and the blade edge has an arc section for contacting the surface of the workpiece.
3. The plane milling cutter according to claim 1, characterized in that: After the surface of the workpiece is cut by the blade, a cutting arc groove is formed. The bottom surface of the blade and the surface of the workpiece have a clearance angle, and the groove depth of the cutting arc groove increases or decreases as the angle of the clearance angle increases or decreases.
4. The surface milling cutter according to claim 1, characterized in that: The bottom surface faces the surface of the workpiece and forms an angle with the ring side surface, and the angle is an acute angle.
5. The surface milling cutter according to claim 1, characterized in that: The cutter disc comprises an assembly part; the blades are arranged in an inclined manner in the assembly part, and a part of the blade part is located outside the assembly part.
6. A surface milling cutter, suitable for cutting the surface of a workpiece, characterized in that: The surface milling cutter comprises: a knife plate; a cutter bar, mounted on the cutter disc; and A blade is assembled on the tool bar and has a truncated cone-shaped blade portion. The blade portion has a circular bottom surface and an annular side surface connected to the periphery of the bottom surface. The blade uses the annular side surface as a cutting surface for cutting the surface of the workpiece.
7. The plane milling cutter according to claim 6, characterized in that: The connection between the bottom surface of the blade and the side surface of the ring is a circular blade edge, and the blade edge has an arc section for contacting the surface of the workpiece.
8. The plane milling cutter according to claim 6, characterized in that: After the surface of the workpiece is cut by the blade, a cutting arc groove is formed. The bottom surface of the blade and the surface of the workpiece have a clearance angle, and the groove depth of the cutting arc groove increases or decreases as the angle of the clearance angle increases or decreases.
9. The surface milling cutter according to claim 6, characterized in that: The bottom surface faces the surface of the workpiece and forms an angle with the ring side surface, and the angle is an acute angle.
10. The surface milling cutter according to claim 6, characterized in that: The cutter disc includes a first end face, a second end face opposite to the first end face, and a plurality of assembly parts passing through the first end face and the second end face; the cutter bar is arranged in one of the assembly parts and has an assembly groove; the blade is inclinedly arranged in the assembly groove, and a part of the blade portion is located outside the assembly groove.