A micro-lubrication dry cutting tool

Abstract

The present invention discloses a minimum quantity lubrication dry cutting tool, which includes a tool shank made of tungsten steel and a milling head. The tool shank has a cylindrical structure, and the milling head is arranged at the head of the tool shank and is integrally formed with the tool shank. Two circumferential cutting teeth are evenly distributed in a spiral shape on the outer side of the milling head with the axis line of the tool shank as the center, and end cutting teeth corresponding to the circumferential cutting teeth are arranged at the end. A chip evacuation groove that matches the spiral structure is arranged between adjacent circumferential cutting teeth; the chip evacuation groove is formed by combining a first rounded arc R1, a second rounded arc R2 and a third rounded arc R3. This minimum quantity lubrication dry cutting tool has a simple and generous structure, good visual appearance. When used in combination with the minimum quantity lubrication technology, it has a good chip evacuation effect during the milling process of aluminum, steel and copper in the 3C industry, can reduce the heat generated during the processing, and significantly improves the quality and service life. The minimum quantity lubrication greatly improves the physical health of operators and the ecological environment.

Description

Technical Field

[0001] The present invention relates to the field of CNC machine tool cutters, and particularly to a minimum quantity lubrication dry cutting cutter. Background Art

[0002] With the sharp increase in the usage of domestic CNC machine tools, especially the adoption of new technologies such as high-rigidity integral casting machine beds, high-speed operation numerical control systems, and spindle dynamic balance, as well as the continuous development of cutter materials, modern machining is developing towards high speed, high precision, and high-power cutting. The performance, quality, and reliability of CNC machine tool cutters and tool systems, as well as the level of cutter management systems, directly affect the production efficiency and machining quality of CNC machine tools, and also directly affect the production technology level and economic benefits of the entire machinery manufacturing industry. It can be said that the level of CNC machine tool cutters and their management systems is becoming the "bottleneck" restricting the machining efficiency of CNC machine tools in China's manufacturing industry.

[0003] Currently, most CNC machine tools adopt cutting fluid processing technology, that is, cutting fluid composed of chemical components is used in combination with ordinary tungsten carbide cutters used in CNC machine tools to mill metal materials such as aluminum, stainless steel, titanium alloy, powder metallurgy, and die steel on electronic products. The cutting fluid can cool and lubricate the CNC machine tool cutters.

[0004] However, this cutting fluid processing technology uses a large amount of cutting fluid, and improper treatment of waste cutting fluid will cause serious pollution to the environment. Moreover, the cutting fluid of this type of chemical composition has a pungent smell, which also has certain harm to the physical health of operators and the ecological environment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a minimum quantity lubrication dry cutting cutter with a small demand for cutting fluid and good chip removal effect.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions: A minimum quantity lubrication dry cutting tool includes a tool shank made of tungsten steel and a milling head. The tool shank has a cylindrical structure, and the milling head is arranged at the head of the tool shank and is integrally formed with the tool shank. Two circumferential cutting teeth are evenly distributed in a spiral shape on the outer side of the milling head with the axis line of the tool shank as the center, and end teeth corresponding to the circumferential cutting teeth are arranged at the end. A chip removal groove that matches its spiral structure is arranged between adjacent circumferential cutting teeth; the chip removal groove is formed by combining a first rounded arc R1, a second rounded arc R2, and a third rounded arc R3. The second rounded arc R2 is between the first rounded arc R1 and the second rounded arc R2. Among them, the third rounded arc R3 is close to the outer side of the milling head, and its arc surface protrudes outward. The first rounded arc R1 is close to the center of the milling head, and the arc surfaces of the first rounded arc R1 and the second rounded arc R2 are both concave. The first rounded arc R1, the second rounded arc R2, and the third rounded arc R3 connected together form a smooth curved surface with an S-shaped outer end.

[0007] Preferably, the radius of the first rounded arc R1 is 12.8 - 15.8 mm, the radius of the second rounded arc R2 is 5.5 - 7.5 mm, and the radius of the third rounded arc R3 is 8.5 - 20 mm.

[0008] Preferably, the end teeth include a milling edge for milling, and an arc-shaped cutting edge is arranged on the cutting edge surface of the milling edge.

[0009] Preferably, the radius of the arc-shaped cutting edge is 10 - 15 mm.

[0010] Preferably, the outer parts of the tool shank and the milling head are coated with a colored high-hardness diamond coating.

[0011] Preferably, the length h from the end of the milling head to the end of the tool shank is 60 mm, and the diameter d of the milling head is 6 mm.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: This minimum quantity lubrication dry cutting tool has a simple and generous structure, good visual appearance. When used in combination with the minimum quantity lubrication technology, it has good chip removal effect during the milling process of aluminum, steel, and copper in the 3C industry, can reduce the heat generated during processing, and significantly improve the quality and service life. The minimum quantity lubrication greatly improves the physical health of operators and the ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the drawings.

[0014] Figure 1 It is a schematic diagram of the outer structure of a minimum quantity lubrication dry cutting tool of the present invention;

[0015] Figure 2It is a schematic diagram of the end face structure of a minimum quantity lubrication dry cutting tool of the present invention;

[0016] Figure 3 is Figure 2 an enlarged view of the structure of A in

[0017] In the figure: 1, tool shank; 2, milling head; 3, circumferential cutting teeth; 4, chip removal groove; 5, end teeth; 6, arc cutting edge. Specific embodiments

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0019] Figure 1 A minimum quantity lubrication dry cutting tool shown includes a tool shank 1 made of tungsten steel and a milling head 2. The tool shank 1 has a cylindrical structure. The milling head 2 is arranged at the head of the tool shank 1 and is integrally formed with the tool shank 1. The length h from the end of the milling head 2 to the end of the tool shank 1 is 60 mm, and the diameter d of the milling head 2 is 6 mm. Two circumferential cutting teeth 3 are evenly distributed in a spiral shape on the outer side of the milling head 2 with the axis line of the tool shank 1 as the center. End teeth 5 corresponding to the circumferential cutting teeth 3 are arranged at the end. A chip removal groove 4 that matches the spiral structure is arranged between adjacent circumferential cutting teeth 3.

[0020] Such as Figure 2As shown, the chip removal groove 4 is formed by combining a first rounded arc R1, a second rounded arc R2, and a third rounded arc R3; the second rounded arc R2 is between the first rounded arc R1 and the second rounded arc R2, where the first rounded arc R1 is close to the center of the milling head 2. The arc surfaces of both the first rounded arc R1 and the second rounded arc R2 are concave. The position of the first rounded arc R1 is mainly for shock resistance. When the dry cutting tool cuts, the force of the first contact is very large, the speed is fast, and the rotation speed of the machine tool handle is high. If it is a straight groove structure, it is easy to cause the tool to crack and break teeth, while using this arc groove type, it is not easy to have the phenomenon of tool breakage and chipping. However, the arc cannot be too large or too small. After repeated verification, its radius is preferably 12.8 - 15.8 mm; the third rounded arc R3 is close to the outside of the milling head 2, and its arc surface is convex. The connected first rounded arc R1, second rounded arc R2, and third rounded arc R3 form a smooth curved surface with an S-shaped outer end. The positions of the second rounded arc R2 and the third rounded arc R3 are mainly for chip removal. When the dry cutting tool works, it cools and removes chips from the tool product in the form of a sprayed liquid through the minimum quantity lubrication technology; this chip removal method has high requirements for the chip removal groove 4 of the tool. If the chip removal groove 4 is not smooth enough and not wide enough, the chip removal groove 4 is easily blocked, resulting in the phenomenon that the processed product is easily burr. After repeated verification, when the radius of the second rounded arc R2 is 5.5 - 7.5 mm and the radius of the third rounded arc R3 is 8.5 - 20 mm, the chip removal groove 4 is smooth and will not be blocked.

[0021] As Figure 3 As shown, in order to increase the sharpness of the end teeth 5 and the stability of the tool, the end teeth 5 include a milling edge for milling, and an arc edge 6 is provided on the edge surface of the milling edge; the radius of the arc edge 6 is 10 - 15 mm, and the arc edge 6 can also play a role in damping when the CNC machine tool table rotates during the operation of the tool.

[0022] In order to further improve the service life and hardness of the tool, the outer parts of the tool shank 1 and the milling head 2 are coated with a colored high-hardness diamond coating.

[0023] This minimum quantity lubrication dry cutting tool has a simple and generous structure, good visual appearance. When used in combination with the minimum quantity lubrication technology, it has a good chip removal effect during the milling process of aluminum, steel, and copper in the 3C industry, can reduce the heat generated during the processing, and significantly improve the quality and service life. The minimum quantity lubrication greatly improves the physical health of the operators and the ecological environment.

[0024] It should be emphasized that: The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A micro-lubrication dry cutting tool, comprising a tool shank (1) made of tungsten steel and a milling head (2), wherein the tool shank (1) has a cylindrical structure, and the milling head (2) is arranged at the head of the tool shank (1) and is integrally formed with the tool shank (1), and is characterized in that: On the outer side of the milling head (2), two circumferential cutting teeth (3) are evenly distributed in a spiral around the axis of the tool shank (1). At the end, end teeth (5) corresponding to the circumferential cutting teeth (3) are provided. A chip discharge groove (4) that matches its spiral structure is arranged between adjacent circumferential cutting teeth (3); the chip discharge groove (4) is formed by the combination of a first rounded arc (R1), a second rounded arc (R2), and a third rounded arc (R3). The second rounded arc (R2) is between the first rounded arc (R1) and the second rounded arc (R2). Among them, the third rounded arc (R3) is close to the outer side of the milling head (2), and its arc surface is convex outward. The first rounded arc (R1) is close to the center of the milling head (2). The arc surfaces of the first rounded arc (R1) and the second rounded arc (R2) are both concave inward. The connected first rounded arc (R1), second rounded arc (R2), and third rounded arc (R3) form a smooth surface with an S-shaped outer end; The radius of the first rounded arc (R1) is 12.8 - 15.8 mm, the radius of the second rounded arc (R2) is 5.5 - 7.5 mm, and the radius of the third rounded arc (R3) is 8.5 - 20 mm; The end teeth (5) include a milling edge for milling, and an arc-shaped cutting edge (6) is arranged on the cutting edge surface of the milling edge; The outer parts of the tool shank (1) and the milling head (2) are coated with a colored high-hardness diamond coating.

2. The minimum quantity lubrication dry cutting tool according to claim 1, characterized in that: The radius of the arc-shaped cutting edge (6) is 10 - 15 mm.

3. The minimum quantity lubrication dry cutting tool according to claim 1, characterized in that: The length h from the end of the milling head (2) to the end of the tool shank (1) is 60 mm, and the diameter d of the milling head (2) is 6 mm.

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