Scrap-sticking-preventing round nose milling cutter with stepped cutting edge

Abstract

The utility model discloses a stepped cutting edge anti-sticking round nose milling cutter, which comprises a base, a support rod, a round nose milling cutter and an anti-sticking mechanism, the base is fixed on an external machine tool, the support rod is fixed at the center of the base, the round nose milling cutter is coaxially arranged at one end of the support rod far away from the base, and the round nose milling cutter is provided with a stepped cutting edge. The utility model has the beneficial effects that the bearing seat is driven by the transmission disc to integrally revolve on the supporting rod, and the driven bevel gear is meshed and linked with the driving bevel gear and synchronously drives the linkage bevel gear to be meshed and linked while the bearing seat revolves, so as to drive the flow guide disc and the spray head to rotate; the gear linkage structure drives the spray head to revolve and rotate around the milling cutter, so that the cleaning liquid jet flow uniformly covers the surface of the cutter, a local flushing blind area caused by a traditional fixed spray head is thoroughly eliminated, and compared with the fixed spray head which only flushes a certain area in a directional mode, the design remarkably reduces the residual risk of waste chips in complex structures such as a stepped cutting edge and a chip removal groove.

Description

Technical Field

[0001] This utility model relates to a round nose end mill, specifically a stepped-edge anti-chip round nose end mill, belonging to the technical field of round nose end mills. Background Technology

[0002] A round nose end mill is an end mill with a rounded tip. Its tip radius is usually greater than 1 / 4 of the tool diameter. It can perform precision machining of planes, inclined surfaces and curved surfaces through rotary cutting. It is especially suitable for machining complex curved surfaces in mold manufacturing, aerospace and other fields. Its name comes from the rounded design of the tip of the cutting edge, which is similar to the "round nose" profile. It combines the functional advantages of flat end mills and ball end mills.

[0003] However, most existing round nose end mills have various problems. For example, in the round nose end mill for machining low-sulfur stainless steel disclosed in publication number CN217571034U, although it solves the problem of severe edge wear of existing round nose end mills after a period of machining, existing round nose end mills generally need to be used with a nozzle to spray cleaning fluid to wash away the chips and prevent chip adhesion. However, in machining scenarios where the cutter head is stationary and the workpiece is rotating, the fixed nozzle can only directionally wash a local area of ​​the tool, making it difficult to completely solve the problem of chip residue. Especially in high-intensity cutting processes, chip accumulation will aggravate tool wear, reduce machining accuracy, and even affect the surface finish of the workpiece. For example, traditional round nose end mills achieve cooling through guide grooves and flow channels, but the washing coverage is not optimized. Some improved solutions adopt a double chip groove design to smooth the chip removal path, but external washing assistance is still required. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings in existing technologies by proposing a stepped-edge anti-chip-sticking round nose end mill.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stepped-edge anti-chip-sticking round nose end mill includes a base, a support rod, a round nose end mill, and an anti-chip-sticking mechanism. The base is fixed on an external machine tool, the support rod is fixed at the center of the base, the round nose end mill is coaxially mounted on the support rod at one end away from the base, and the round nose end mill has a stepped cutting edge. The anti-chip-sticking mechanism is mounted on the support rod.

[0007] The anti-chipping mechanism includes a support base, a guide plate, and a nozzle. The support base is rotatably connected to a support rod, which is located at the center of the support base. Both the support base and the support rod have cavities inside, and their connection points have through holes. The guide plate is rotatably connected to one end of the support base. The nozzle is coaxially fixed at the axis of the guide plate, and the guide plate has a guide cavity inside. The nozzle communicates with the guide cavity, and through holes are provided at the rotatable connection points of the guide plate and the support base.

[0008] As a further embodiment of this utility model: the anti-chipping mechanism further includes an active bevel gear, a driven bevel gear, and a linkage bevel gear. The active bevel gear is coaxially fixed on the support rod, the driven bevel gear is rotatably connected to the support seat, the linkage bevel gear is coaxially fixed outside the guide plate, and the driven bevel gear meshes between the active bevel gear and the linkage bevel gear.

[0009] As a further embodiment of this utility model: a transmission disc is rotatably connected to the support rod, the transmission disc is fixed to the bottom of the support base, and the transmission disc is connected to an external transmission device via a belt.

[0010] As a further improvement of this utility model: the peripheral wall of the transmission disk is provided with an arc-shaped groove, and multiple through holes are provided through the transmission disk.

[0011] As a further embodiment of this utility model: at least two sets of the guide plate and nozzle and their connecting structure are symmetrically arranged on the support, and the round nose milling cutter is located between two adjacent nozzles.

[0012] As a further improvement of this utility model: a guide tube docking hole is provided through the center of the bottom of the base, the guide tube docking hole is connected to the internal cavity of the support rod, and a thread is provided on the inner wall of the guide tube docking hole.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, the transmission disc drives the support base to revolve on the support rod. Simultaneously, the driven bevel gear meshes with the driving bevel gear, and drives the linkage bevel gear to mesh, thereby causing the guide disc and nozzle to rotate. The gear linkage structure drives the nozzle to revolve around the milling cutter and rotate on its own axis, so that the cleaning fluid jet evenly covers the surface of the tool, completely eliminating the localized cleaning blind spots caused by traditional fixed nozzles. Compared with fixed nozzles that only clean a specific area, this design significantly reduces the risk of residual chips in complex structures such as stepped cutting edges and chip removal grooves. Furthermore, the centrifugal force and jet work together to accelerate the removal of chips from the tool surface, reducing the amount of cutting fluid used and improving cleaning efficiency. At the same time, the stability of the gear transmission structure ensures the synchronicity of the cleaning action during continuous machining, avoiding jet deviation caused by vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the support rod and its overall connection structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the anti-chip sticking mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the linkage bevel gear and its connection structure of the present invention.

[0019] In the diagram: 1. Base, 2. Support rod, 3. Round nose milling cutter, 4. Anti-chip sticking mechanism, 5. Guide tube docking hole, 41. Support seat, 42. Guide plate, 43. Nozzle, 44. Drive bevel gear, 45. Driven bevel gear, 46. Linkage bevel gear, 47. Transmission plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 4 As shown, a stepped-edge anti-chip-sticking round nose end mill includes a base 1, a support rod 2, a round nose end mill 3, and an anti-chip-sticking mechanism 4. The base 1 is fixed on an external machine tool, the support rod 2 is fixed at the center of the base 1, the round nose end mill 3 is coaxially mounted on the support rod 2 at one end away from the base 1, and the round nose end mill 3 has a stepped cutting edge. The anti-chip-sticking mechanism 4 is mounted on the support rod 2.

[0022] The anti-chipping mechanism 4 includes a support 41, a guide plate 42, and a nozzle 43. The support 41 is rotatably connected to the support rod 2, which is located at the center of the support 41. Both the support 41 and the support rod 2 have cavities inside, and the connection between them has through holes. The guide plate 42 is rotatably connected to one end of the support 41. The nozzle 43 is coaxially fixed at the axis of the guide plate 42, and the guide plate 42 has a guide cavity inside. The nozzle 43 communicates with the guide cavity, and the rotatable connection ends of the guide plate 42 and the support 41 have through holes.

[0023] The anti-chipping mechanism 4 also includes a drive bevel gear 44, a driven bevel gear 45 and a linkage bevel gear 46. The drive bevel gear 44 is coaxially fixed on the support rod 2, the driven bevel gear 45 is rotatably connected to the support seat 41, and the linkage bevel gear 46 is coaxially fixed outside the guide plate 42, and the driven bevel gear 45 meshes between the drive bevel gear 44 and the linkage bevel gear 46.

[0024] A transmission disc 47 is rotatably connected to the support rod 2. The transmission disc 47 is fixed to the bottom of the support base 41 and is connected to an external transmission device via a belt.

[0025] In this invention, the transmission disc 47 drives the support base 41 to revolve on the support rod 2. Simultaneously, the driven bevel gear 45 meshes with the driving bevel gear 44, and synchronously drives the linkage bevel gear 46 to mesh, thereby driving the guide disc 42 and the nozzle 43 to rotate. The gear linkage structure drives the nozzle to revolve around the milling cutter and rotate on its own axis, so that the cleaning fluid jet evenly covers the surface of the tool, completely eliminating the localized rinsing blind spots caused by traditional fixed nozzles. Compared with fixed nozzles that only directionally rinse a certain area, this design significantly reduces the risk of residual chips in complex structures such as stepped cutting edges and chip removal grooves. It also accelerates the removal of chips from the tool surface through the synergistic effect of centrifugal force and jet, reducing the amount of cutting fluid used and improving rinsing efficiency. At the same time, the stability of the gear transmission structure ensures the synchronicity of the rinsing action during continuous machining and avoids jet deviation caused by vibration. Example 2

[0026] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0027] The transmission disc 47 has an arc-shaped groove on its peripheral wall and multiple through holes through it. The arc-shaped groove limits the belt and prevents it from slipping off. At the same time, the through holes reduce the weight of the transmission disc 47.

[0028] The guide plate 42 and the nozzle 43 and their connecting structure are arranged symmetrically in two sets on the support 41. The round nose end mill 3 is located between two adjacent nozzles 43. The arrangement of multiple nozzles 43 improves the flushing efficiency of waste chips.

[0029] A guide tube docking hole 5 is provided through the center of the bottom of the base 1. The guide tube docking hole 5 is connected to the internal cavity of the support rod 2, and a thread is provided on the inner wall of the guide tube docking hole 5 so that the external guide tube can be quickly docked with the guide tube docking hole 5 and the cleaning liquid can be introduced into the support rod 2.

[0030] Working principle: When using this round nose end mill, first quickly connect the external guide tube to the guide tube docking hole 5 through the thread, and then start the milling operation. During operation, the round nose end mill 3 abuts against the workpiece to generate waste chips. At this time, the external transmission device drives the support seat 41 to revolve on the support rod 2 through the belt, so that the nozzle 43 revolves coaxially outside the round nose end mill 3. At the same time, the driven bevel gear 45 meshes with the driving bevel gear 44 and drives the linkage bevel gear 46 to mesh, thereby driving the guide plate 42 and the nozzle 43 to rotate, thus washing away the waste chips on the surface of the round nose end mill 3.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepped-edge anti-chip-sticking round nose end mill, comprising a base (1), a support rod (2), a round nose end mill (3), and an anti-chip-sticking mechanism (4), characterized in that, The base (1) is fixed on an external machine tool, the support rod (2) is fixed at the center of the base (1), the round nose end mill (3) is coaxially arranged on the support rod (2) at one end away from the base (1), and the round nose end mill (3) has a stepped cutting edge. The anti-chip sticking mechanism (4) is arranged on the support rod (2). The anti-sticking chip mechanism (4) includes a support (41), a guide plate (42), and a nozzle (43). The support (41) is rotatably connected to the support rod (2). The support rod (2) is located at the center of the support (41). Both the support (41) and the support rod (2) have cavities inside, and the connection between them has through holes. The guide plate (42) is rotatably connected to one end of the support (41). The nozzle (43) is coaxially fixed at the axis of the guide plate (42). The guide plate (42) has a guide cavity inside. The nozzle (43) communicates with the guide cavity. Both the guide plate (42) and the support (41) have through holes.

2. A stepped-edge anti-chip-sticking round nose end mill according to claim 1, characterized in that: The anti-chipping mechanism (4) further includes an active bevel gear (44), a driven bevel gear (45), and a linkage bevel gear (46). The active bevel gear (44) is coaxially fixed on the support rod (2), the driven bevel gear (45) is rotatably connected to the support seat (41), and the linkage bevel gear (46) is coaxially fixed outside the guide plate (42). The driven bevel gear (45) meshes between the active bevel gear (44) and the linkage bevel gear (46).

3. A stepped-edge anti-chip-sticking round nose end mill according to claim 1, characterized in that: A transmission disc (47) is rotatably connected to the support rod (2). The transmission disc (47) is fixed to the bottom of the support base (41), and the transmission disc (47) is connected to an external transmission device via a belt.

4. A stepped-edge anti-chip-sticking round nose end mill according to claim 3, characterized in that: The transmission disk (47) has an arc-shaped groove on its peripheral wall and multiple through holes through it.

5. A stepped-edge anti-chip-sticking round nose end mill according to claim 1, characterized in that: The guide plate (42) and nozzle (43) and their connecting structure are arranged in at least two sets symmetrically on the support (41), and the round nose milling cutter (3) is located between two adjacent nozzles (43).

6. A stepped-edge anti-chip-sticking round nose end mill according to claim 1, characterized in that: A guide pipe docking hole (5) is provided through the center of the bottom of the base (1). The guide pipe docking hole (5) is connected to the internal cavity of the support rod (2), and a thread is provided on the inner wall of the guide pipe docking hole (5).

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