Double-core radial milling cutter

Abstract

The utility model discloses a double-core radial milling cutter which comprises a main body unit, the main body unit comprises a cutter handle and a cutting handle, an inner core is arranged in the center of the cutting handle, a plurality of blades are arranged on the inner core, a chip groove is formed between every two adjacent blades and the inner core, each chip groove is arranged to be in a U shape, and the cutter handle is arranged on the main body unit. Each chip groove comprises a front-end groove and a rear-end groove, and the core diameter at the position of each front-end groove is 0.6-0.65 times of the diameter of the cutting edge. The chip groove has the beneficial effects that the chip grooves are U-shaped, and the core diameter at the position of each front-end groove is 0.6-0.65 times of the diameter of the cutting edge, so that a relatively large chip space can be kept; and the core diameter of the rear end groove is set to be 0.75 times of the diameter of the cutting edge, so that the whole cutter has excellent chip removal capacity and extremely high rigidity even when used for cutting deep grooves or deep cavities, the cutting efficiency is improved, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a double-core-diameter milling cutter. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. Each tooth cuts off the excess of the workpiece intermittently in sequence during operation. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0003] The core diameters of the front and rear ends of the existing milling cutter are set equally. When cutting deep grooves or deep cavities, the chip removal ability is poor and the rigidity of the tool is poor, which not only affects the cutting efficiency but also shortens the service life of the tool.

[0004] Therefore, a double core diameter milling cutter is needed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above-mentioned problems of the double-core diameter milling cutter, the present utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide a double-core diameter milling cutter, which is used to solve the problems that the front and rear end core diameters of the existing milling cutter are set equally, the chip removal ability is poor when cutting deep grooves or deep cavities, and the rigidity of the tool is poor, which not only affects the cutting efficiency but also shortens the service life of the tool.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a double core diameter milling cutter, comprising:

[0009] A main body unit, the main body unit includes a tool holder and a cutting handle, an inner core is arranged at the center of the cutting handle, a plurality of blades are arranged on the inner core, a chip groove is formed between two adjacent blades and the inner core, each of the chip grooves is arranged in a "U" shape, each of the chip grooves includes a front end groove and a rear end groove, the core diameter size at each front end groove position is 0.6-0.65 times the blade diameter, preferably 0.63 times, the core diameter size at each rear end groove position is 0.75 times the blade diameter, and each blade includes a cutting head.

[0010] As a preferred solution of the double-core-diameter milling cutter described in the utility model, the tool handle is made of a tungsten steel bar with high tensile strength, and the top of the tool handle is provided with a chamfer for easy handling and avoiding scratches.

[0011] As a preferred solution of the double-core milling cutter described in the utility model, the cutting head includes a first cutting edge and a second cutting edge, and the heights of the first cutting edge and the second cutting edge from the inner core are different.

[0012] As a preferred solution of the double-core-diameter milling cutter described in the utility model, the plurality of cutting edges are all in a continuous spiral shape, and the spiral angle is 38°.

[0013] As a preferred solution of the double-core-diameter milling cutter described in the utility model, the diameter of the cutting shank is smaller than the diameter of the tool handle, and the surface of the blade is coated with a high-temperature resistant coating.

[0014] As a preferred solution of the double-core milling cutter described in the utility model, a through hole for heat dissipation and cutting fluid injection is opened at the center of the inner core, and the tool handle and cutting handle are integrated.

[0015] Beneficial effects of the utility model:

[0016] By setting the chip removal groove to a "U" shape and setting the core diameter at the front end groove to 0.6-0.65 times the blade diameter, a larger chip removal space can be maintained and the tool has better rigidity. By setting the core diameter at the rear end groove to 0.75 times the blade diameter, the entire tool has excellent chip removal ability and extremely high rigidity even when cutting deep grooves or deep cavities, which is beneficial to improving cutting efficiency and extending tool life. 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 briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 It is a front structural schematic diagram of a double-core diameter milling cutter of the utility model.

[0019] Figure 2 It is a schematic diagram of the side structure of a double-core diameter milling cutter of the utility model.

[0020] Figure 3 It is a front view structural schematic diagram of the front end of a double-core diameter milling cutter of the utility model.

[0021] Description of the drawings: 100, main unit; 101, tool handle; 101a, chamfer; 102, cutting handle; 103, inner core; 103a, through hole; 104, blade; 105, chip groove; 105a, front end groove; 105b, rear end groove; 106, cutting head; 106a, first cutting edge; 106b, second cutting edge. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Reference Figure 1-Figure 3 , is an embodiment of the utility model, providing a double core diameter milling cutter, which comprises:

[0027] The main unit 100 includes a tool handle 101 and a cutting handle 102. An inner core 103 is arranged at the center of the cutting handle 102. A plurality of blades 104 are arranged on the inner core 103. A chip groove 105 is formed between two adjacent blades 104 and the inner core 103. Each chip groove 105 is arranged in a "U" shape. Each chip groove 105 includes a front end groove 105a and a rear end groove 105b. The core diameter size at the position of each front end groove 105a is 0.6-0.65 times the diameter of the blade 104, preferably 0.63 times. The core diameter size at the position of each rear end groove 105b is 0.75 times the diameter of the blade 104. Each blade 104 includes a cutting head 106, wherein the blade 104 is precisely ground and polished with a diamond grinding wheel.

[0028] The handle 101 is made of a tungsten steel bar with high tensile strength. The top of the handle 101 is provided with a chamfer 101a for easy handling and avoiding scratches. The tungsten steel bar has high tensile strength.

[0029] The cutting head 106 includes a first cutting edge 106a and a second cutting edge 106b. The first cutting edge 106a and the second cutting edge 106b are at different heights from the inner core 103. Cutting is performed by the first cutting edge 106a and the second cutting edge 106b.

[0030] The plurality of blades 104 are all in a continuous spiral shape, with a spiral angle of 38°. The blades are arranged in a spiral shape for easy chip removal.

[0031] The diameter of the cutting handle 102 is smaller than that of the tool handle 101 , and the surface of the blade 104 is coated with a high temperature resistant coating. By coating the high temperature resistant coating, the tool can withstand a maximum temperature of less than 1100° C. generated during cutting.

[0032] A through hole 103a is provided at the center of the inner core 103 for heat dissipation and cutting fluid spraying. The tool handle 101 and the cutting handle 102 are integrated, and heat dissipation and cutting fluid spraying are facilitated through the through hole.

[0033] Working principle: By setting the chip groove 105 to a "U" shape and setting the core diameter at the front end groove 105a to 0.6-0.65 times the diameter of the blade 104, a larger chip removal space can be maintained and the tool has better rigidity. By setting the core diameter at the rear end groove 105b to 0.75 times the diameter of the blade 104, the entire tool has excellent chip removal ability and extremely high rigidity even when cutting deep grooves or deep cavities, which is beneficial to improving cutting efficiency and extending tool life. At the same time, this design can lengthen the blade 104, which is beneficial to improving the quality of the finished surface. The contents not described in detail in this description belong to the existing technology known to professional and technical personnel in this field.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A double core diameter milling cutter, characterized in that: include: A main body unit (100) comprises a tool holder (101) and a cutting handle (102); an inner core (103) is arranged at the center of the cutting handle (102); a plurality of blades (104) are arranged on the inner core (103); a chip groove (105) is formed between two adjacent blades (104) and the inner core (103); each chip groove (105) is arranged in a "U" shape; each chip groove (105) comprises a front end groove (105a) and a rear end groove (105b); the core diameter size at the position of each front end groove (105a) is 0.6-0.65 times the diameter of the blade (104); the core diameter size at the position of each rear end groove (105b) is 0.75 times the diameter of the blade (104); and each blade (104) comprises a cutting head (106).

2. A double core diameter milling cutter according to claim 1, characterized in that: The knife handle (101) is made of a tungsten steel bar with high tensile strength, and the top of the knife handle (101) is provided with a chamfer (101a) for easy handling and avoiding scratches.

3. A double core diameter milling cutter according to claim 1, characterized in that: The cutting head (106) comprises a first cutting edge (106a) and a second cutting edge (106b), and the first cutting edge (106a) and the second cutting edge (106b) are at different heights from the inner core (103).

4. A double core diameter milling cutter according to claim 1, characterized in that: The plurality of blades (104) are all in a continuous spiral shape, and the spiral angle is 38°.

5. The double core diameter milling cutter according to claim 1, characterized in that: The diameter of the cutting handle (102) is smaller than the diameter of the tool handle (101), and the surface of the blade (104) is coated with a high-temperature resistant coating.

6. A double core diameter milling cutter according to claim 1, characterized in that: A through hole (103a) is provided at the center of the inner core (103) for facilitating heat dissipation and spraying cutting fluid, and the tool handle (101) and the cutting handle (102) are integrated.

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