Round nose coating knife with stepped cooling channel

Abstract

The utility model discloses a round nose coating cutter with a stepped cooling channel, which comprises a fixed seat, a butt joint cavity, a milling cutter bar and a cooling unit, the butt joint cavity is arranged on the fixed seat in a penetrating manner, a mounting cavity is arranged in the fixed seat, the mounting cavity is positioned on one side of the butt joint cavity, and a locking component is arranged in the mounting cavity. Compared with the prior art, the cutter has the advantages that the effective contact area of cooling liquid and the cutter body is greatly increased through the design of the stepped variable-depth grooves, the critical heat flux density is improved through the micro-jet effect generated by the stepped structure, the effective cooling time is prolonged to be multiple times of that of a traditional cutter under the intermittent cutting working condition, and the cutting efficiency is improved. Compared with the prior art, the milling cutter bar has the advantages that the peeling rate of a cutter coating is greatly reduced, the service life of the milling cutter bar is greatly prolonged, meanwhile, the working efficiency is also improved, the milling cutter bar and the supporting bar with different diameters can be synchronously locked through the arrangement of the locking assembly, and the overall stability and the milling precision of the cutter during milling operation are improved.

Description

Technical Field

[0001] This utility model relates to a round nose coated knife, specifically a round nose coated knife with a stepped cooling channel, belonging to the technical field of round nose coated knives. Background Technology

[0002] As a core cutting tool in the field of precision machining, the ball nose coated end mill has unique advantages in the semi-finishing and finishing of workpieces such as mold cavities and complex curved surfaces in aerospace applications due to its ball head fillet radius design.

[0003] However, most existing round nose coated cutting tools have various problems. Existing round nose coated cutting tools generally adopt a design of equal-depth spiral cooling grooves. Although this structure can achieve basic coolant delivery, it exposes significant defects under high-speed machining conditions, such as unbalanced heat load distribution: the local temperature of the tool rake face is high, while the effective coverage area of ​​the traditional coolant is low in the high-temperature area; and because the cooling area that the equal-section cooling groove can cool is insufficient, the tool must be stopped to cool down after machining for a period of time, which seriously restricts the machining economy. 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 of existing technologies by proposing a round nose coated knife with a stepped cooling channel.

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

[0006] A round nose coated cutter with a stepped cooling channel includes a fixed base, a mating cavity, a milling cutter bar, and a cooling unit. The mating cavity is disposed through the fixed base, and the fixed base has a mounting cavity located on one side of the mating cavity. A locking component is disposed in the mounting cavity. The milling cutter bar is disposed in the mating cavity and locked by the locking component. The cooling unit is disposed on the milling cutter bar.

[0007] The cooling unit includes a support rod and a cooling groove. The support rod is coaxially fixed to the bottom end of the milling cutter bar. The cooling groove is recessed on the side wall of the milling cutter bar. Both the milling cutter bar and the support rod have cavities at their axial centers. The cooling groove has multiple spray holes that communicate with the cavities. The cooling groove has a stepped structure.

[0008] As a further embodiment of this utility model: a docking cylinder is coaxially fixed to one end of the support rod away from the milling cutter rod, the outer wall of the docking cylinder is provided with threads, and the docking cylinder is connected to an external guide pipe through the threads.

[0009] As a further embodiment of this utility model: the locking assembly includes an abutment rod, a push rod, and a pressing plate. The abutment rod is slidably disposed between the mounting cavity and the docking cavity. The push rod is slidably disposed in the mounting cavity, and there are multiple push rods, which abut against each other. The pressing plate is slidably disposed in the mounting cavity on the side away from the abutment rod and slides against the push rod.

[0010] As a further embodiment of this utility model: a lead screw is connected to one side of the fixed base via a screw hole threaded connection, and one end of the lead screw is rotatably connected to the extrusion plate.

[0011] As a further embodiment of this utility model: an abutment plate is coaxially fixed to one end of the abutment rod near the push rod, and a return spring is sleeved on the abutment rod. One end of the return spring abuts against the abutment plate, and the other end abuts against the inner wall of the mounting cavity.

[0012] As a further improvement of this utility model, the outer surface of the milling cutter bar is entirely coated with a diamond coating.

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

[0014] This invention utilizes a stepped variable-depth channel design to significantly increase the effective contact area between the coolant and the tool body. The micro-jet effect generated by the stepped structure enhances the critical heat flux density. Under intermittent cutting conditions, the effective cooling time is extended to several times that of traditional tools, and the tool coating peeling rate is significantly reduced, thereby greatly extending the service life of the milling cutter bar. At the same time, it also improves work efficiency. Furthermore, the locking component allows milling cutter bars and support rods of different diameters to be locked synchronously, improving the overall stability and milling accuracy of the tool during milling operations. 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 locking component structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall connection structure of the milling cutter bar of this utility model;

[0018] Figure 4 This is a partially enlarged structural diagram of the cooling tank of this utility model.

[0019] In the diagram: 1. Fixed seat, 2. Dating cavity, 3. Milling cutter bar, 4. Support rod, 5. Cooling tank, 6. Dating cylinder, 7. Abutment rod, 8. Push rod, 9. Extrusion plate, 10. Lead screw, 11. Abutment plate, 12. Return spring. 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 round nose coated cutter with a stepped cooling channel includes a fixed base 1, a docking cavity 2, a milling cutter bar 3, and a cooling unit. The docking cavity 2 is disposed through the fixed base 1. The fixed base 1 is provided with an installation cavity located on one side of the docking cavity 2. A locking component is provided in the installation cavity. The milling cutter bar 3 is disposed in the docking cavity 2 and locked by the locking component. The cooling unit is disposed on the milling cutter bar 3.

[0022] The cooling unit includes a support rod 4 and a cooling tank 5. The support rod 4 is coaxially fixed to the bottom end of the milling cutter bar 3. The cooling tank 5 is recessed on the side wall of the milling cutter bar 3. Both the milling cutter bar 3 and the support rod 4 have cavities at their axial centers. The cooling tank 5 has multiple spray holes that communicate with the cavities. The cooling tank 5 has a stepped structure.

[0023] The locking assembly includes an abutment rod 7, a push rod 8, and a pressing plate 9. The abutment rod 7 is slidably disposed between the mounting cavity and the docking cavity 2. The push rod 8 is slidably disposed in the mounting cavity, and multiple push rods 8 are provided, with the multiple push rods 8 abutting against each other. The pressing plate 9 is slidably disposed in the mounting cavity on the side away from the abutment rod 7, and slides against the push rod 8.

[0024] In this invention, the stepped variable depth channel design significantly increases the effective contact area between the coolant and the tool body. The micro-jet effect generated by the stepped structure increases the critical heat flux density. Under intermittent cutting conditions, the effective cooling time is extended to many times that of traditional tools, and the tool coating peeling rate is greatly reduced, thereby significantly extending the service life of the milling cutter shank 3. At the same time, it also improves work efficiency. Furthermore, the locking component allows the milling cutter shank 3 and the support rod 4 with different diameters to be locked synchronously, improving the overall stability and milling accuracy of the tool during milling operations. Example 2

[0025] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0026] A connecting cylinder 6 is coaxially fixed to one end of the support rod 4 away from the milling cutter rod 3. The outer wall of the connecting cylinder 6 is threaded, and the connecting cylinder 6 is connected to the external guide pipe through the thread, so that the external guide pipe can be quickly disassembled and assembled.

[0027] A screw 10 is connected to one side of the fixed base 1 via a screw hole threaded connection. One end of the screw 10 is rotatably connected to the extrusion plate 9. The position of the extrusion plate 9 can be quickly adjusted by rotating the screw 10.

[0028] A contact plate 11 is coaxially fixed to one end of the contact rod 7 near the push rod 8, and a return spring 12 is sleeved on the contact rod 7. One end of the return spring 12 abuts against the contact plate 11, and the other end abuts against the inner wall of the mounting cavity. The spring force of the return spring 12 enables the contact rod 7 to quickly return to its original position.

[0029] The outer surface of the milling cutter shank 3 is coated with a diamond coating, which increases the overall hardness of the milling cutter shank 3.

[0030] Working principle: When using this round nose coating cutter, first place the milling cutter bar 3 and support rod 4 in the docking cavity 2, then rotate the lead screw 10 to drive the extrusion plate 9 to move. The extrusion plate 9 drives multiple push rods 8 to move in tandem, and the push rods 8 push the abutment rod 7 to slide and abut against the milling cutter bar 3 and support rod 4 respectively. After locking the two in the docking cavity 2, the external guide tube and the docking cylinder 6 are connected by screwing to start the milling operation.

[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 round-nose coated cutter with stepped cooling channels, comprising a fixed base (1), a mating cavity (2), a milling cutter bar (3), and a cooling unit, characterized in that, The docking cavity (2) is disposed through the fixed seat (1). The fixed seat (1) is provided with an installation cavity located on one side of the docking cavity (2). A locking component is provided in the installation cavity. The milling cutter bar (3) is disposed in the docking cavity (2) and locked by the locking component. The cooling unit is disposed on the milling cutter bar (3). The cooling unit includes a support rod (4) and a cooling groove (5). The support rod (4) is coaxially fixed to the bottom end of the milling cutter bar (3). The cooling groove (5) is recessed on the side wall of the milling cutter bar (3). A cavity is provided at the axis of both the milling cutter bar (3) and the support rod (4). Multiple spray holes are provided in the cooling groove (5). The spray holes are connected to the cavity. The cooling groove (5) has a stepped structure.

2. A round-nose coated blade with a stepped cooling channel according to claim 1, characterized in that: A docking cylinder (6) is coaxially fixed at one end of the support rod (4) away from the milling cutter rod (3). The outer wall of the docking cylinder (6) is provided with threads, and the docking cylinder (6) is connected to the external guide pipe through the threads.

3. A round-nose coated blade with a stepped cooling channel according to claim 1, characterized in that: The locking assembly includes an abutment rod (7), a push rod (8), and a pressing plate (9). The abutment rod (7) is slidably disposed between the mounting cavity and the docking cavity (2). The push rod (8) is slidably disposed in the mounting cavity, and there are multiple push rods (8) that abut against each other. The pressing plate (9) is slidably disposed in the mounting cavity on the side away from the abutment rod (7) and slides against the push rod (8).

4. A round-nose coated blade with a stepped cooling channel according to claim 3, characterized in that: The fixed base (1) is connected to a lead screw (10) on one side by a screw hole threaded connection, and one end of the lead screw (10) is rotatably connected to the extrusion plate (9).

5. A round-nose coated blade with a stepped cooling channel according to claim 3, characterized in that: An abutment plate (11) is coaxially fixed on one end of the abutment rod (7) near the push rod (8), and a return spring (12) is sleeved on the abutment rod (7). One end of the return spring (12) abuts against the abutment plate (11), and the other end abuts against the inner wall of the mounting cavity.

6. A round nose coated blade with stepped cooling channels according to claim 1, characterized in that: The outer surface of the milling cutter bar (3) is entirely coated with a diamond coating.

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