Inner R angle forming milling cutter

Abstract

The utility model provides an inner R angle forming milling cutter, which belongs to the technical field of milling cutters and comprises a cutter head, three cutter teeth are arranged on the outer side of the cutter head, the included angle between every two cutter teeth is 120 degrees, and grooves are arranged on the inner sides of the cutter teeth. The milling cutter and the cutter holder are mutually fixed through the mounting groove, the outer cylinder and the fixing column are locked by arranging the connecting mechanism and installing screws in the corresponding screw holes and the through holes, a user can conveniently disassemble, maintain or replace the cutter head, and the heat dissipation mechanism is arranged, so that the heat dissipation effect is good. Heat is transferred into the cooling liquid through the heat conduction pipe, the cooling liquid absorbs the heat, evaporates, is converted into a gas state, then enters the condensation chamber through the evaporation channel, is liquefied and attached to the inner wall of the condensation chamber after releasing the heat, and then flows back into the cooling cavity through the evaporation channel, so that the heat dissipation speed of the tool bit is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling cutters, and particularly relates to an inner R-angle forming milling cutter. Background Art

[0002] The inner R-angle forming milling cutter, also known as a concave arc end mill, is a special milling cutter dedicated to milling convex R-shaped arc surfaces on a CNC machining center. This kind of milling cutter is particularly important in the mold manufacturing industry because it can well meet the process requirements of chamfering and R-chamfering of the mold surface. The characteristics of the inner R-angle forming milling cutter include high machining accuracy, good surface roughness of the machined workpiece, convenient loading and unloading, thus effectively improving production efficiency. In addition, this kind of milling cutter has a wide range of adaptability and can be processed from general untreated materials to hardened steel, which is very suitable for inner corner rounding and profiling machining of molds and mechanical parts.

[0003] When the cutter head of the milling cutter rubs against the workpiece at high speed, high temperature will be generated. The traditional inner R-angle cutter head generally dissipates heat naturally, and the heat dissipation efficiency is very low. If the temperature is not lowered in time, it will affect the quality of the processed product, and it will also damage the milling cutter and reduce the service life of the milling cutter. In addition, the cutting teeth directly contact and grind the workpiece, resulting in serious wear. After long-term work, it is easy for the cutting teeth to have notches or even cracks, and the staff needs to spend a lot of time replacing and repairing the cutter head. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an inner R-angle forming milling cutter, aiming to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An inner R-angle forming milling cutter includes a cutter head, the outside of the cutter head is provided with cutting teeth, the number of the cutting teeth is set to three, the included angle between two of the cutting teeth is 120°, a groove is arranged inside the cutting teeth, a first cutter body and a second cutter body are arranged on the side surface of the cutter head, an installation groove is arranged on the outside of the second cutter body, and further includes:

[0007] A connection mechanism, which is arranged on the side surface of the cutter head;

[0008] A heat dissipation mechanism, which is arranged inside the connection mechanism.

[0009] As a preferred scheme of the utility model, the connection mechanism includes a fixed column, a clamping strip, an outer cylinder, a fixed groove, a clamping groove, a screw hole, a through hole and a screw, the fixed column is fixedly installed on the side surface of the first cutter body, and the two clamping strips are both fixedly installed on the outside of the fixed column.

[0010] As a preferred solution of the present utility model, the outer cylinder is fixedly installed on the side of the second cutter body, the fixing groove is opened inside the fixing column, and both of the two clamping grooves are opened on the side of the fixing groove.

[0011] As a preferred solution of the present utility model, the screw hole is opened on the outer side of the fixing column, the through hole is opened inside the outer cylinder, and the screw is installed inside the screw hole and the through hole.

[0012] As a preferred solution of the present utility model, the heat dissipation mechanism includes a cooling cavity, a cooling cavity, a heat conduction pipe, an evaporation channel, a condensation chamber and a sealing cover. The cooling cavity is arranged inside the first cutter body, a coolant is arranged inside the cooling cavity, and all of the three heat conduction pipes are fixedly installed inside the cooling cavity.

[0013] As a preferred solution of the present utility model, the evaporation channel is arranged inside the fixing column, and the condensation chamber is arranged inside the second cutter body.

[0014] As a preferred solution of the present utility model, the width of the evaporation channel is smaller than the widths of the cooling cavity and the condensation chamber, and the sealing cover is installed on the side of the second cutter body.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The installation groove is used for fixing the milling cutter and the tool holder to each other to improve the stability of their connection. Corresponding convex blocks for clamping can be arranged on the corresponding tool holder, so that the assembly of the milling cutter and the tool holder is more stable, and the safety of the equipment operation is improved. Through the setting of the connection mechanism, the clamping grooves in the outer cylinder are aligned with the clamping strips on the fixing column, and the outer cylinder is sleeved on the outer side of the fixing column. By installing the screws in the corresponding screw holes and through holes, the outer cylinder and the fixing column are locked, which is convenient for the user to disassemble, repair or replace the tool head. Through the setting of the heat dissipation mechanism, the heat is transferred to the coolant through the heat conduction pipe. After the coolant absorbs the heat, it evaporates and is converted into a gas state, and then enters the condensation chamber through the evaporation channel. After releasing the heat, the coolant liquefies and adheres to the inner wall of the condensation chamber, and then flows back to the cooling cavity through the evaporation channel, improving the heat dissipation speed of the tool head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is the overall structural schematic diagram of the present utility model;

[0020] Figure 3 is the partial structural sectional view of the present utility model;

[0021] Figure 4 is the partial structural sectional view of the present utility model.

[0022] In the figure: 1, cutting head; 2, cutting teeth; 3, groove; 4, first cutter body; 5, second cutter body; 6, mounting groove; 7, connecting mechanism; 701, fixing column; 702, clamping strip; 703, outer cylinder; 704, fixing groove; 705, clamping groove; 706, screw hole; 707, through hole; 708, screw; 8, heat dissipation mechanism; 801, cooling cavity; 802, heat conduction tube; 803, evaporation channel; 804, condensation chamber; 805, sealing cover. Specific embodiments

[0023] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0024] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an embodiment that is separate from or selectively mutually exclusive with other embodiments. Embodiment

[0026] As Figures 1-4 shown, it is the first embodiment of the present utility model. This embodiment provides an internal R-angle forming milling cutter, including,

[0027] a cutting head 1, on the outer side of the cutting head 1, there are cutting teeth 2 arranged. The number of the cutting teeth 2 is set to three, and the included angle between two cutting teeth 2 is 120°. On the inner side of the cutting teeth 2, there is a groove 3. On the side surface of the cutting head 1, there are a first cutter body 4 and a second cutter body 5. On the outer side of the second cutter body 5, there is a mounting groove 6. It further includes:

[0028] a connecting mechanism 7, which is arranged on the side surface of the cutting head 1 and is used for replacing the cutting head 1;

[0029] The heat dissipation mechanism 8 is arranged inside the connecting mechanism 7 and is used to dissipate heat from the tool bit 1.

[0030] As Figures 1-4 shown, the installation groove 6 is used to fix the milling cutter and the tool holder to each other, so as to improve the stability of their connection. Embodiment

[0031] Refer to Figure 3 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment.

[0032] In this embodiment, the connecting mechanism 7 includes a fixing column 701, a clamping strip 702, an outer cylinder 703, a fixing groove 704, a clamping groove 705, a screw hole 706, a through hole 707 and a screw 708. The fixing column 701 is fixedly installed on the side surface of the first tool body 4, both clamping strips 702 are fixedly installed on the outer side of the fixing column 701, the outer cylinder 703 is fixedly installed on the side surface of the second tool body 5, the fixing groove 704 is opened inside the fixing column 701, both clamping grooves 705 are opened on the side surface of the fixing groove 704, the screw hole 706 is opened on the outer side of the fixing column 701, the through hole 707 is opened inside the outer cylinder 703, and the screw 708 is installed inside the screw hole 706 and the through hole 707.

[0033] As Figure 3 shown, by sleeving the outer cylinder 703 on the outer side of the fixing column 701 and installing the screw 708 in the corresponding screw hole 706 and through hole 707, the outer cylinder 703 and the fixing column 701 are locked, which is convenient for the user to disassemble, repair or replace the tool bit 1. Embodiment

[0034] Refer to Figure 4 , which is the third embodiment of the present utility model. This embodiment is based on the previous two embodiments.

[0035] In this embodiment, the heat dissipation mechanism 8 includes a cooling cavity 801, a heat conduction pipe 802, an evaporation channel 803, a condensation chamber 804 and a sealing cover 805. The cooling cavity 801 is arranged inside the first tool body 4, a coolant is arranged inside the cooling cavity 801, all three heat conduction pipes 802 are fixedly installed inside the cooling cavity 801, the evaporation channel 803 is arranged inside the fixing column 701, the condensation chamber 804 is arranged inside the second tool body 5, the width of the evaporation channel 803 is smaller than the widths of the cooling cavity 801 and the condensation chamber 804, and the sealing cover 805 is installed on the side surface of the second tool body 5.

[0036] As Figure 4As shown in the figure, heat is transferred to the coolant through the heat-conducting tube 802. After absorbing the heat, the coolant evaporates and is converted into a gas state. Then, it enters the condensation chamber 804 through the evaporation channel 803. After releasing the heat, the coolant liquefies and adheres to the inner wall of the condensation chamber 804. Then, it flows back to the cooling chamber 801 through the evaporation channel 803, improving the heat dissipation speed of the tool bit 1.

[0037] During use, the installation groove 6 is used to fix the milling cutter and the tool holder to each other, so as to improve the stability of their connection and the safety of the equipment operation. Align the card slot 705 in the outer cylinder 703 with the card strip 702 on the fixed column 701, and sleeved the outer cylinder 703 on the outside of the fixed column 701. By installing the screw 708 in the corresponding screw hole 706 and through hole 707, the outer cylinder 703 and the fixed column 701 are locked, which is convenient for the user to disassemble, repair or replace the tool bit 1. During the use of the tool bit 1, a large amount of heat is generated. The heat-conducting tube 802 transfers the heat to the coolant. After absorbing the heat, the coolant evaporates and is converted into a gas state. Then, it enters the condensation chamber 804 through the evaporation channel 803. After releasing the heat, the coolant liquefies and adheres to the inner wall of the condensation chamber 804. Then, it flows back to the cooling chamber 801 through the evaporation channel 803, improving the heat dissipation speed of the tool bit 1 and also extending the service life.

[0038] To sum up: The installation groove 6 is used to fix the milling cutter and the tool holder to each other to improve the stability of their connection. Corresponding convex blocks for clamping can be set on the corresponding tool holder, making the assembly of the milling cutter and the tool holder more stable and improving the safety of the equipment operation. Through the setting of the connection mechanism 7, align the card slot 705 in the outer cylinder 703 with the card strip 702 on the fixed column 701, and sleeved the outer cylinder 703 on the outside of the fixed column 701. By installing the screw 708 in the corresponding screw hole 706 and through hole 707, the outer cylinder 703 and the fixed column 701 are locked, which is convenient for the user to disassemble, repair or replace the tool bit 1. Through the setting of the heat dissipation mechanism 8, heat is transferred to the coolant through the heat-conducting tube 802. After absorbing the heat, the coolant evaporates and is converted into a gas state. Then, it enters the condensation chamber 804 through the evaporation channel 803. After releasing the heat, the coolant liquefies and adheres to the inner wall of the condensation chamber 804. Then, it flows back to the cooling chamber 801 through the evaporation channel 803, improving the heat dissipation speed of the tool bit 1.

Claims

1. An internal R angle forming milling cutter, characterized in that: The invention comprises a cutter head (1), wherein the outer side of the cutter head (1) is provided with cutter teeth (2), the number of the cutter teeth (2) is set to three, the angle between two cutter teeth (2) is 120°, the inner side of the cutter teeth (2) is provided with a groove (3), the side of the cutter head (1) is provided with a first cutter body (4) and a second cutter body (5), the outer side of the second cutter body (5) is provided with a mounting groove (6), and further comprises: A connecting mechanism (7), wherein the connecting mechanism (7) is arranged on a side of the cutter head (1) and is used for replacing the cutter head (1); A heat dissipation mechanism (8), wherein the heat dissipation mechanism (8) is arranged inside the connection mechanism (7) and is used to dissipate heat from the cutter head (1).

2. The inner R angle forming milling cutter according to claim 1, characterized in that: The connecting mechanism (7) comprises a fixing column (701), a clamping strip (702), an outer cylinder (703), a fixing groove (704), a clamping groove (705), a screw hole (706), a through hole (707) and a screw (708); the fixing column (701) is fixedly mounted on a side surface of the first blade body (4); and the two clamping strips (702) are fixedly mounted on the outside of the fixing column (701).

3. The inner R angle forming milling cutter according to claim 2, characterized in that: The outer cylinder (703) is fixedly mounted on the side of the second blade body (5), the fixing groove (704) is provided inside the fixing column (701), and the two clamping grooves (705) are both provided on the side of the fixing groove (704).

4. The inner R angle forming milling cutter according to claim 2, characterized in that: The screw hole (706) is provided on the outside of the fixing column (701), the through hole (707) is provided inside the outer cylinder (703), and the screw (708) is installed inside the screw hole (706) and the through hole (707).

5. The inner R angle forming milling cutter according to claim 1, characterized in that: The heat dissipation mechanism (8) comprises a cooling chamber (801), a heat conducting pipe (802), an evaporation channel (803), a condensation chamber (804) and a sealing cover (805); the cooling chamber (801) is arranged inside the first blade body (4); a coolant is arranged inside the cooling chamber (801); and the three heat conducting pipes (802) are fixedly mounted inside the cooling chamber (801).

6. The inner R angle forming milling cutter according to claim 5, characterized in that: The evaporation channel (803) is arranged inside the fixed column (701), and the condensation chamber (804) is arranged inside the second blade body (5).

7. The inner R angle forming milling cutter according to claim 5, characterized in that: The width of the evaporation channel (803) is smaller than the width of the cooling chamber (801) and the condensation chamber (804), and the sealing cover (805) is installed on the side of the second blade body (5).

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