Composite plunge milling cutter and milling machine
By designing a composite milling cutter that combines a multi-functional cutting edge and a spiral chip removal groove, the problem of multi-tool machining in existing technologies has been solved, enabling efficient and low-cost precision hole machining and planar milling, while reducing tool costs and machining time.
Patent Information
- Application Number
- CN202423121512.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2034-12-17
AI Technical Summary
In the existing technology, the machining of aluminum metal parts for electronic products requires multiple cutting tools to achieve the required precision, which leads to increased tool costs and longer machining time.
Design a composite milling cutter, comprising a connected shank and a cutter head. The cutter head is equipped with multifunctional first, second, and third cutting edges. A boss and a chamfer are provided at the end near the shank. The cutting edge side is used for general milling, the boss is used for fine milling, and the chamfer is used for chamfering of holes. Combined with a spiral chip vent, chip removal is optimized.
This invention enables multifunctional composite milling cutters adapted to different usage scenarios, reducing tool costs, improving machining accuracy and efficiency, and reducing manual tool changing time.
Smart Images
Figure CN223970912U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cutting tool processing technology, specifically to composite milling cutters and milling machines. Background Technology
[0002] Currently, most electronic products use aluminum metal parts. In order to control the cost of CNC machining, cost control is required from the aspects of tool design and machining process. Some structural parts are affected by machining accuracy and require multiple tools to complete and meet the accuracy requirements, which not only increases the cost of tools, but also leads to the increase of machining time. Utility Model Content
[0003] To address the shortcomings of existing technologies, it is necessary to provide a multifunctional composite milling tool that can adapt to different application scenarios.
[0004] On the other hand, it is necessary to provide a milling machine that uses this composite milling cutter.
[0005] This application provides a composite milling cutter for milling surfaces on a workpiece. It includes a tool holder and a cutter head connected together. The cutter head includes a first cutting edge, a second cutting edge, and a third cutting edge located at the front end of the tool holder. The first, second, and third cutting edges are arranged sequentially along the circumference of the tool holder. Each of the first, second, and third cutting edges has a boss at its end near the tool holder, and each boss is connected to the first, second, and third cutting edges. Each boss has a chamfered portion at its end near the tool holder, inclined away from the tool holder, and each chamfered portion is connected to each boss.
[0006] This application provides a multi-functional composite milling cutter that can adapt to different application scenarios. It is mainly designed for precision hole machining, hole chamfering, and plane or side milling of workpieces. This not only greatly reduces tool costs and provides high machining accuracy, but also reduces manual tool changing and tool setting time. The side of the cutting edge can be used for ordinary milling of the hole of the workpiece, the boss of the cutting edge can be used for fine milling of the hole of the workpiece, and the chamfer of the cutting edge can be used for chamfering of the hole of the workpiece.
[0007] In some embodiments of this application, chip removal grooves are provided between the first cutting edge, the second cutting edge, and the third cutting edge, and the first cutting edge, the second cutting edge, and the third cutting edge are inclined in the same direction so that the first cutting edge, the second cutting edge, and the third cutting edge form a spiral structure with the chip removal groove.
[0008] In some embodiments of this application, the chip removal groove includes:
[0009] The first chip removal groove is located at the front end of the cutter head;
[0010] The second chip removal groove is located between the tool holder and the first chip removal groove. The second chip removal groove is connected to the first chip removal groove. The lengths of the first chip removal groove and the second chip removal groove along the circumference of the tool head are different.
[0011] The third chip removal groove is located between the tool holder and the second chip removal groove, and the third chip removal groove is connected to the second chip removal groove.
[0012] In some embodiments of this application, the first cutting edge, the second cutting edge, and the third cutting edge include a first rake face, a first transition face, a second transition face, a third transition face, a first side cutting face, and a second side cutting face. A first chip removal groove is formed between the second side cutting face and the adjacent third transition face, and a second chip removal groove is formed between the second side cutting face and the adjacent second transition face. The first rake face is used for milling the surface of the workpiece, and the first side cutting face is used for milling the hole of the workpiece.
[0013] In some embodiments of this application, the helical angle of the second chip removal groove is 15°-35°.
[0014] In some embodiments of this application, the boss includes a second rake face, a third side face, a fourth transition surface, and a fourth side face. A third chip removal groove is formed between the fourth side face and the adjacent fourth transition surface. The second rake face and the third side face are used for fine milling of the workpiece.
[0015] In some embodiments of this application, the chamfered portion includes a third rake face, which is inclined in a direction away from the tool holder, and the inclination angle of the third rake face is 45°.
[0016] In some embodiments of this application, the helical angle between the first and second cutting edges is 120°, the helical angle between the second and third cutting edges is 120°, and the helical angle between the first and third cutting edges is 120°.
[0017] This application also provides a milling machine including the aforementioned composite milling cutter. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the composite milling cutter of this application.
[0019] Figure 2 This is a schematic diagram of the composite milling cutter of this application from another perspective.
[0020] Figure 3 This is a schematic diagram of the composite milling tool of this application milling the surface of a workpiece.
[0021] Figure 4 This is a schematic diagram of the composite milling tool used in this application for ordinary milling of the hole portion of a workpiece.
[0022] Figure 5This is a schematic diagram of the composite milling tool used in this application for fine milling of the hole surface of a workpiece.
[0023] Figure 6 This is a schematic diagram of the composite milling cutter used in this application to chamfer and remove burrs from the hole of a workpiece.
[0024] Explanation of key component symbols:
[0025] Workpiece 10
[0026] Hole 11
[0027] Handle 110
[0028] 120 blades
[0029] First blade 121
[0030] Second blade 122
[0031] Third blade 123
[0032] 130mm protrusion
[0033] Chamfered section 140
[0034] First chip removal groove 151
[0035] Second chip removal groove 152
[0036] Third chip removal groove 153
[0037] First rake face 1201
[0038] First transition surface 1202
[0039] Second transition surface 1203
[0040] Third transition surface 1204
[0041] First side face 1205
[0042] Second side cutting edge 1206
[0043] Second rake face 1301
[0044] Third side cutting edge 1302
[0045] Fourth transition surface 1303
[0046] Fourth side face 1304
[0047] Third rake face 1401
[0048] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation
[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0050] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component that is centrally located. When a component is considered to be "located" on another component, it can be directly located on the other component or may also have a component that is centrally located.
[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0052] Please see Figure 1 This application provides a composite plunge milling cutter for milling the surface of a workpiece 10. The composite plunge milling cutter includes a connected tool holder 110 and a cutter head 120. The cutter head 120 includes a first cutting edge 121, a second cutting edge 122, and a third cutting edge 123. The first cutting edge 121, the second cutting edge 122, and the third cutting edge 123 are arranged sequentially along the circumference of the cutter head 120. By providing three cutting edges, vibration during machining can be prevented, thereby improving machining stability and accuracy. Moreover, this structural design allows the cutter to maintain uniform force during milling, reducing tool wear and extending its service life.
[0053] Please see Figure 5 The first cutting edge 121, the second cutting edge 122, and the third cutting edge 123 are provided with a boss 130 at one end near the tool holder 110. Each boss 130 is interconnected with the corresponding first cutting edge 121, second cutting edge 122, and third cutting edge 123. By providing the bosses, it can be used as a tool for fine milling, which helps to ensure the surface finish of the machined product. Each boss 130 is provided with a chamfered portion 140 at one end near the tool holder 110, which is inclined away from the tool holder 110. Each chamfered portion 140 is interconnected with the corresponding boss 130. Please refer to [link / reference]. Figure 6 Setting a chamfered section 140 can remove burrs from the opening.
[0054] This application provides a boss 130 at the end of the cutting edge near the tool holder 110, and a chamfered portion 140 at the end of the boss 130 near the tool holder 110. The side of the cutting edge can be used for ordinary milling of the hole 11 of the workpiece 10. The boss 130 of the cutting edge can be used for fine milling of the hole 11 of the workpiece 10. The chamfered portion 140 of the cutting edge can be used for chamfering of the hole 11 of the workpiece 10. Therefore, a multifunctional composite plunge milling tool that can adapt to different usage scenarios is realized. This composite plunge milling tool is mainly used for precision hole machining, hole chamfering, and planar or side milling of products, which not only greatly reduces tool costs and provides high machining accuracy, but also reduces manual tool changing and tool setting time.
[0055] In one embodiment of this application, chip removal grooves are formed between the first cutting edge 121, the second cutting edge 122, and the third cutting edge 123. The first cutting edge 121, the second cutting edge 122, and the third cutting edge 123 are inclined in the same direction, forming a spiral structure with the chip removal grooves. The spiral shape of the chip removal grooves optimizes chip discharge, effectively preventing chip accumulation during machining and reducing the impact of chips on the milling area. This design helps ensure the cleanliness of the working area, thereby reducing milling heat and increasing tool life. The combination of the inclined cutting edges and the chip removal grooves enhances the tool's self-cleaning ability during milling. After chips are removed, they flow quickly to the chip removal grooves, improving machining efficiency and reducing the possibility of clogging and vibration. The inclined design of the spiral-shaped cutting edges helps enhance stability during milling. Due to the forward milling and chip removal of the cutting edges, the milling force is evenly distributed.
[0056] Please see Figure 1 , Figure 3 , Figure 4 and Figure 5 In one embodiment of this application, each chip removal groove includes a first chip removal groove 151, a second chip removal groove 152, and a third chip removal groove 153. The first chip removal groove 151 is located at the front end of the cutter head 120. Figure 1 and Figure 3 As shown, the first chip removal groove 151 is directly connected to the milling area, which can effectively and timely collect and remove chips, reduce chip retention in the milling area, and improve milling efficiency. Figure 1 and Figure 4 As shown, the second chip removal groove 152 is located between the tool holder 110 and the first chip removal groove 151, and the second chip removal groove 152 communicates with the first chip removal groove 151. The first chip removal groove 151 and the second chip removal groove 152 have different lengths along the circumferential direction of the tool head 120. This arrangement can further enhance chip guidance and discharge, optimize the flow path of the milling fluid, and allow chips to be discharged from the compound milling tool more quickly, reducing the potential interference of chips on the new milled surface. Figure 1 and Figure 5 As shown, the third chip removal groove 153 is located between the tool holder 110 and the second chip removal groove 152, and the third chip removal groove 153 is connected to the second chip removal groove 152. The composite plunge milling cutter can effectively reduce heat accumulation while ensuring milling surface accuracy, maintaining the tool's high-efficiency milling capability and extending the service life of the composite plunge milling cutter. It not only improves chip removal capability but also increases the applicability of the composite plunge milling cutter in deep hole machining or complex shape milling.
[0057] Please see Figure 2In one embodiment of this application, the first cutting edge 121, the second cutting edge 122, and the third cutting edge 123 each include a first front cutting surface 1201, a first transition surface 1202, a second transition surface 1203, a third transition surface 1204, a first side cutting surface 1205, and a second side cutting surface 1206. The first transition surface 1202 is connected to one end of the first front cutting surface 1201, the second transition surface 1203 is connected to the end of the first transition surface 1202 away from the first front cutting surface 1201, the third transition surface 1204 is connected to one side of the first transition surface 1202 and is connected to the second transition surface 1203, the first side cutting surface 1205 is connected to the side of the first transition surface 1202 away from the third transition surface 1204 and is connected to the second transition surface 1203, and the second side cutting surface 1206 is connected to one side of the first side cutting surface 1205 and its end is connected to the first front cutting surface 1201. A first chip removal groove 151 is formed between the second side face 1206 and the adjacent third transition surface 1204. A second chip removal groove 152 is formed between the second side face 1206 and the adjacent second transition surface 1203. The first rake face 1201 is used for milling the surface of the workpiece 10, and the first side face 1205 is used for milling the hole portion 11 of the workpiece 10. The first rake face 1201 is responsible for milling the surface of the workpiece 10 and provides the main milling function. The first side face 1205 is used for milling the hole portion 11 of the workpiece 10, which effectively meets different machining requirements and ensures that the composite plunge milling tool can play a maximum role in multiple machining tasks. The design of the first transition surface 1202, the second transition surface 1203 and the third transition surface 1204 ensures that the milling flow of the composite plunge milling tool is smoother, reduces unnecessary friction between the composite plunge milling tool and the workpiece 10, thereby reducing milling force and milling heat, and helping to extend the life of the composite plunge milling tool. A first chip removal groove 151 is formed between the second side face 1206 and the adjacent third transition surface 1204, while a second chip removal groove 152 is formed between the second side face 1206 and the adjacent second transition surface 1203, optimizing the chip removal path. Effective chip removal design reduces chip accumulation, ensuring a clean milling area and thus improving machining accuracy and efficiency. By combining the rake face and side face with a multi-layered transition surface design, the composite plunge milling tool not only improves milling efficiency but also enhances its stability and rigidity, ensuring a precise milling trajectory during milling.
[0058] In one embodiment of this application, the helix angle of the second chip groove 152 is 15°-35°. The optimized helix angle improves chip flowability, allowing chips to exit the milling area more smoothly. An appropriate helix angle reduces chip accumulation, minimizing friction and obstruction caused by chip retention during milling. The third rake face 1401 is inclined at 15° to 35°, a design that makes the cutting angle more suitable, enabling more effective entry into the workpiece 10 and improving cutting initiative and efficiency. A suitable helix angle effectively balances the milling conditions of the composite plunge milling tool. This design allows the composite plunge milling tool to maintain stable performance under different machining conditions.
[0059] Please see Figure 2 In one embodiment of this application, the boss 130 includes a second rake face 1301, a third side face 1302, a fourth transition surface 1303, and a fourth side face 1304. The second rake face 1301 is connected to the end of the first side face 1205 away from the first transition surface 1202. The third side face 1302 is connected to the end of the second rake face 1301 away from the first side face 1205. The fourth transition surface 1303 is connected to the same side of the second rake face 1301 and the third side face 1302. The fourth side face 1304 is connected to the side of the second rake face 1301 and the third side face 1302 away from the fourth transition surface 1303. A third chip removal groove 153 is formed between the fourth side face 1304 and the adjacent fourth transition surface 1303. The second rake face 1301 and the third side face 1302 are used for fine milling of the workpiece 10. The combination of the second rake face 1301 and the third side face 1302 enables the composite plunge milling tool to ensure smaller tolerances and better surface finish during fine milling, meeting the requirements of high-precision machining. By integrating multiple tool faces into a single boss 130, the function and stress distribution of the composite plunge milling tool are optimized, vibration during milling is reduced, and machining stability is improved. Composite plunge milling tools are better able to meet the challenges of modern machining, improve machining quality and efficiency, and are of great significance in meeting the diverse needs of precision manufacturing.
[0060] Please see Figure 2 , Figure 6 In one embodiment of this application, the chamfered portion 140 includes a third rake face 1401, which is inclined in a direction away from the tool holder 110, and the inclination angle of the third rake face 1401 is 45°. The outward inclination of the third rake face 1401 makes the milling angle more suitable, enabling it to cut into the workpiece 10 more effectively and improving the efficiency of milling.
[0061] In one embodiment of this application, the first cutting edge 121, the second cutting edge 122 and the third cutting edge 123 are evenly distributed on the cutting head 120.
[0062] This application also provides a milling machine including the aforementioned composite plunge milling cutter. The plunge milling cutter of this application has a boss 130 at the end of the cutting edge near the tool holder 110, and a chamfered portion 140 at the end of the boss 130 near the tool holder 110. The side of the cutting edge can be used for ordinary milling of the hole 11 of the workpiece 10. The boss 130 of the cutting edge can be used for fine milling of the hole 11 of the workpiece 10. The chamfered portion 140 of the cutting edge can be used for chamfering of the hole 11 of the workpiece 10, thus realizing a multi-functional composite plunge milling cutter adaptable to different application scenarios. This composite plunge milling cutter is mainly used for precision hole machining, hole chamfering, and planar or side milling of products, which not only greatly reduces the cost of using composite plunge milling cutters, but also provides high machining accuracy and reduces manual tool changing and tool setting time.
[0063] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and substance of the technical solutions of this application.
Claims
1. A composite slotting end mill for face milling a workpiece, the composite slotting end mill comprising a shank and a head connected together, characterised in that, The tool head comprises a first cutting edge, a second cutting edge and a third cutting edge, which are sequentially arranged along the circumference of the tool head; Each of the first cutting edge, the second cutting edge and the third cutting edge is provided with a boss near one end of the tool shank, each of the bosses is connected with the corresponding first cutting edge, second cutting edge or third cutting edge, and each of the bosses is provided with a chamfered portion inclined away from the tool shank near one end of the tool shank, and each of the chamfered portions is connected with the corresponding boss.
2. The composite slotting end mill according to claim 1, wherein, The first cutting edge, the second cutting edge and the third cutting edge are inclined in the same direction.
3. The composite slotting end mill according to claim 2, wherein, Each of the first cutting edge, the second cutting edge and the third cutting edge is provided with a chip removal groove, and each of the chip removal grooves forms a spiral structure.
4. The composite slotting end mill according to claim 3, wherein, Each of the chip removal grooves comprises: A first chip removal groove arranged at the front end of the tool head; A second chip removal groove arranged between the tool shank and the first chip removal groove, the second chip removal groove being in communication with the first chip removal groove, and the first chip removal groove and the second chip removal groove being different in length along the circumference of the tool head; and A third chip removal groove arranged between the tool shank and the second chip removal groove, the third chip removal groove being in communication with the second chip removal groove.
5. The composite slotting end mill according to claim 4, wherein, The first cutting edge, the second cutting edge and the third cutting edge each comprise a first rake face, a first transition face, a second transition face, a third transition face, a first flank face and a second flank face, the first transition face being connected to one end of the first rake face, the second transition face being connected to one end of the first transition face away from the first rake face, the third transition face being connected to one side of the first transition face and connected with the second transition face, the first flank face being connected to one side of the first transition face away from the third transition face and connected with the second transition face, the second flank face being connected to one side of the first flank face and the end thereof being connected with the first rake face, the second flank face and the adjacent third transition face forming the first chip removal groove, the second flank face and the adjacent second transition face forming the second chip removal groove, the first rake face being used for face milling of the surface of the workpiece, and the first flank face being used for face milling of the hole of the workpiece.
6. The composite slotting end mill according to claim 4, wherein, The spiral angle of the second chip removal groove is 15°-35°.
7. The composite slotting end mill according to claim 5, wherein, The boss comprises a second rake face, a third flank face, a fourth transition face and a fourth flank face, the second rake face being connected to one end of the first flank face away from the first transition face, the third flank face being connected to one end of the second rake face away from the first flank face, the fourth transition face being connected to the same side of the second rake face and the third flank face, the fourth flank face being connected to one side of the second rake face and the third flank face away from the fourth transition face, the fourth flank face and the adjacent fourth transition face forming the third chip removal groove, and the second rake face and the third flank face being used for fine face milling of the workpiece.
8. The composite slotting end mill according to claim 1, wherein, The chamfered portion comprises a third rake face, the third rake face being inclined away from the tool shank, and the inclination angle of the third rake face is 45°.
9. The composite slotting end mill according to claim 1, wherein, The first, second and third cutting edges are evenly distributed over the head.
10. A milling machine characterized by, A composite slotting cutter comprising a head according to any one of claims 1-9.