Cutter structure for dry cutting of automobile aluminum alloy parts

Abstract

The utility model provides a cutter structure for dry cutting of automobile aluminum alloy parts, which belongs to the technical field of cutters, and comprises an extension rod, a connecting cavity arranged in the extension rod, an internal thread arranged in the connecting cavity, and a cutting part comprising a cutter head and a connecting seat which are integrally formed, first air channels which are communicated with each other are formed in the tool bit and the connecting seat; anti-skidding grooves for preventing skidding are formed in the opposite surfaces of the reinforcing ring and the connecting seat; a second air channel corresponding to the first air channel is further formed in the extension rod, and an air cavity communicating with the second air channel is further formed in the extension rod. The service life of the whole cutter is prolonged, and the cutting precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a cutting tool structure for dry cutting of automobile aluminum alloy parts. Background Art

[0002] In the automotive manufacturing industry, aluminum alloy parts are widely used due to their lightweight, corrosion resistance and high strength. The traditional aluminum alloy parts cutting process often uses coolant for cutting to reduce cutting temperature and tool wear. However, the use of coolant not only increases production costs, but may also cause environmental pollution. In recent years, dry cutting technology has gradually attracted attention. This technology does not require the use of coolant, can significantly reduce production costs and reduce environmental pollution. When the machining center is processing, the tool is in a high temperature state, and the melting point of aluminum alloy is very low, and the plasticity is large. During cutting, aluminum melts and adheres to the surface of the tool, forming a built-up edge of the chip groove. During high-speed cutting, welding may occur on the blade, which may affect the accuracy at the least and cause more serious processing accidents such as tool breakage at the worst.

[0003] After searching, the Chinese patent application No. 200920173439.9 discloses a cutting tool structure, which mainly has a coupling hole opened along the axial direction inside an extension rod, a cutter head made of a first material is installed in the coupling hole, and a locking tooth seat made of a second material (steel) is welded to one end of the cutter head, so that the locking tooth seat is not only low in hardness and high in toughness and not easy to break, but also not easy to damage the surface of the extension rod to increase the life of the extension rod, and the cutter head is not only good in rigidity and high in accuracy, but also can be formed with a design of multiple cutting parts on the cutter head, and when changing the processing method, it only needs to be directly replaced with the required cutter head, and the extension rod can be reused to reduce the cost, and the length of the extension rod can be adjusted according to the required depth during processing, which is very practical and convenient;

[0004] The above patent still has the following shortcomings during use: since the force exerted by the workpiece on the cutter head during the processing will act on the locking tooth seat, this will cause wear of the internal and external threads of the joint over time, affecting the replacement of the cutter head and shortening the overall service life. In addition, the heat dissipation effect is not ideal, resulting in rapid wear of the tool and low processing accuracy.

[0005] Therefore, there is an urgent need for a tool structure for dry cutting of automotive aluminum alloy parts to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to address the current problems that the force exerted by the workpiece on the cutter head during the processing will act on the locking tooth seat, which will cause wear of the internal and external threads of the joint over time, affect the replacement of the cutter head, and shorten the overall service life. In addition, the heat dissipation effect is not ideal, resulting in rapid wear of the tool and low processing accuracy.

[0007] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0008] A tool structure for dry cutting of automotive aluminum alloy parts, comprising an extension rod, a connecting cavity is arranged inside the extension rod, an internal thread is also arranged inside the connecting cavity, and further comprising:

[0009] The cutting part includes an integrally formed cutter head and a connecting seat, and the connecting seat is threadedly connected to the interior of the connecting cavity through a second external thread provided on the outer wall and matching with the internal thread;

[0010] Wherein, the cutter head and the connecting seat are both provided with first air ducts which are interconnected;

[0011] A first external thread is provided on the outer wall of the extension rod, and the extension rod is threadedly connected to a reinforcement ring for further fixing the connection seat through the first external thread;

[0012] Wherein, the surfaces opposite to the reinforcement ring and the connecting seat are both provided with anti-skid grooves for preventing slipping;

[0013] Among them, the extension rod is also provided with a second air duct corresponding to the first air duct, the extension rod is also provided with an air cavity connected to the second air duct, and the outer wall of the extension rod is also provided with evenly distributed heat dissipation holes connected to the air cavity.

[0014] As a preferred technical solution of the present application, the outer wall of the extension rod is also provided with evenly arranged air guide grooves, and the air guide grooves correspond to the heat dissipation holes.

[0015] As a preferred technical solution of the present application, the outer wall of the reinforcement ring is also provided with evenly distributed arc-shaped wind rods and heat dissipation ports, and evenly distributed heat dissipation plates are also provided inside the heat dissipation ports.

[0016] As a preferred technical solution of the present application, an elastic member is fixedly connected to the interior of the extension rod, and the elastic member cooperates with the connecting seat.

[0017] As a preferred technical solution of the present application, the outer wall of the cutter head is also coated with an aluminum titanium nitride coating.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the scheme of this application:

[0020] 1. By setting a reinforcement ring, after the connecting seat is screwed into the connecting cavity, the anti-skid groove provided by the reinforcement ring is rotated to make the anti-skid groove provided by the reinforcement ring contact and squeeze the anti-skid groove provided by the connecting seat, so as to absorb the force of the workpiece on the cutter head and transmit it to the outer wall of the extension rod, thereby avoiding damage to the internal thread of the extension rod and affecting the subsequent replacement of the cutter head. This solves the problem in the prior art that the force generated by the workpiece on the cutter head during the processing will act on the locking tooth seat, which will cause the internal and external threads provided at the joint to wear over time, affecting the replacement of the cutter head and shortening the overall service life;

[0021] 2. By setting the first air duct and the second air duct in coordination, when the cutter head rotates, an upward airflow is generated through the arc-shaped wind rod arranged on the outer wall of the reinforcement ring, and the airflow is guided to the outside of the heat dissipation hole under the action of the air guide groove, and a negative pressure is generated at the outer opening of the heat dissipation hole. The heat generated by the cutter head is extracted through the air around it through the first air duct and the second air duct, and effective heat dissipation is achieved, thereby solving the problem of unsatisfactory heat dissipation effect in the prior art, resulting in rapid tool wear and low machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structural diagram of the tool structure for dry cutting of automotive aluminum alloy parts provided in this application;

[0023] Figure 2 A schematic cross-sectional view of a tool structure for dry cutting of automotive aluminum alloy parts provided in this application;

[0024] Figure 3 A schematic diagram of the specific structure of the cutting components of the tool structure for dry cutting of automotive aluminum alloy parts provided in this application;

[0025] Figure 4 A schematic diagram of the specific structure of the reinforcement ring of the tool structure for dry cutting of automotive aluminum alloy parts provided in this application.

[0026] Indicated in the figure:

[0027] 1. Extension rod; 11. Connecting cavity; 111. Internal thread; 12. Second air duct; 13. Air cavity; 14. Heat dissipation hole; 15. Air guide groove; 16. Elastic member; 17. First external thread; 2. Cutter head; 21. Connecting seat; 22. Second external thread; 23. First air duct; 24. Aluminum titanium nitride coating; 3. Reinforcement ring; 31. Anti-slip groove; 32. Arc-shaped wind rod; 33. Heat dissipation port; 34. Heat sink. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0029] like Figure 1-4 As shown, a tool structure for dry cutting of automotive aluminum alloy parts proposed in this embodiment includes an extension rod 1, a connecting cavity 11 is provided inside the extension rod 1, and an internal thread 111 is also provided inside the connecting cavity 11, and further includes:

[0030] The cutting part includes an integrally formed cutter head 2 and a connecting seat 21. The connecting seat 21 is threadedly connected to the inside of the connecting cavity 11 through a second external thread 22 provided on the outer wall and matching with the internal thread 111;

[0031] The cutter head 2 and the connecting seat 21 are both provided with a first air duct 23 which is interpenetrating with each other, and the cutter head 2 and the connecting seat 21 are both made of tungsten steel;

[0032] A first external thread 17 is provided on the outer wall of the extension rod 1, and the extension rod 1 is threadedly connected to a reinforcement ring 3 for further fixing the connection seat 21 through the first external thread 17;

[0033] The surfaces of the reinforcement ring 3 and the connecting seat 21 facing each other are both provided with anti-skid grooves 31 for preventing slipping;

[0034] The extension rod 1 is provided with a second air duct 12 corresponding to the first air duct 23, and the extension rod 1 is provided with an air cavity 13 connected to the second air duct 12. The outer wall of the extension rod 1 is provided with evenly distributed heat dissipation holes 14 connected to the air cavity 13.

[0035] The reinforcement ring 3 is provided to absorb the force of the workpiece on the cutter head 2 and transmit it to the outer wall of the extension rod 1, so as to prevent the internal thread 111 inside the extension rod 1 from being damaged and affecting the subsequent replacement of the cutter head 2.

[0036] like Figure 1-2 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the outer wall of the extension rod 1 is also provided with evenly arranged wind guide grooves 15, and the wind guide grooves 15 correspond to the heat dissipation holes 14. Under the action of the wind guide grooves 15, the airflow is guided to the outside of the heat dissipation holes 14, and negative pressure is generated at the outer opening of the heat dissipation holes 14, and the heat generated by the cutter head 2 is extracted through the air around it through the first air duct 23 and the second air duct 12.

[0037] like Figure 4As shown, as a preferred embodiment, on the basis of the above method, further, the outer wall of the reinforcement ring 3 is also provided with evenly distributed arc-shaped wind rods 32 and heat dissipation ports 33, and the interior of the heat dissipation ports 33 is also provided with evenly distributed heat dissipation plates 34, and the heat dissipation plates 34 are provided to absorb and dissipate part of the heat generated during processing.

[0038] like Figure 2 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, an elastic member 16 is fixedly connected inside the extension rod 1, and the elastic member 16 cooperates with the connecting seat 21. The setting of the elastic member 16 increases the stability of the connecting seat 21 and the extension rod 1 to avoid looseness.

[0039] like Figure 1-3 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the outer wall of the cutter head 2 is coated with an aluminum titanium nitride coating 24.

[0040] Specifically, when the tool structure for dry cutting of automobile aluminum alloy parts is in use: after the connecting seat 21 is screwed into the connecting cavity 11 by cooperating the second external thread 22 opened on the connecting seat 21 with the internal thread 111, the anti-skid groove 31 opened on the reinforcing ring 3 is made to contact and squeeze the anti-skid groove 31 opened on the connecting seat 21 by rotating the reinforcing ring 3, so as to absorb the force of the workpiece exerted on the cutter head 2 and transmit it to the outer wall of the extension rod 1, so as to avoid damage to the internal thread 111 inside the extension rod 1 and affect the subsequent replacement of the cutter head 2. At the same time, during the processing, when the cutter head 2 rotates, an upward airflow is generated by the arc-shaped wind rod 32 arranged on the outer wall of the reinforcement ring 3, and under the action of the air guide groove 15, the airflow is guided to the outside of the heat dissipation hole 14, and negative pressure is generated at the outer mouth of the heat dissipation hole 14, and the heat generated by the cutter head 2 is extracted through the air around it through the first air duct 23 and the second air duct 12, and effective heat dissipation is achieved.

[0041] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A tool structure for dry cutting of automotive aluminum alloy parts, comprising an extension rod (1), wherein a connecting cavity (11) is provided inside the extension rod (1), and an internal thread (111) is further provided inside the connecting cavity (11), wherein: Also includes: A cutting portion, the cutting portion comprising an integrally formed cutter head (2) and a connecting seat (21), the connecting seat (21) being threadably connected to the interior of the connecting cavity (11) through a second external thread (22) provided on the outer wall that cooperates with the internal thread (111); Wherein, the cutter head (2) and the connecting seat (21) are both provided with a first air duct (23) which is interconnected; A first external thread (17) is arranged on the outer wall of the extension rod (1), and the extension rod (1) is threadedly connected to a reinforcement ring (3) for further fixing the connection seat (21) through the first external thread (17); Wherein, the opposing surfaces of the reinforcement ring (3) and the connecting seat (21) are both provided with anti-skid grooves (31) for preventing slipping; The extension rod (1) is further provided with a second air duct (12) corresponding to the first air duct (23), the extension rod (1) is further provided with an air cavity (13) connected to the second air duct (12), and the outer wall of the extension rod (1) is further provided with evenly distributed heat dissipation holes (14) connected to the air cavity (13).

2. A tool structure for dry cutting of automotive aluminum alloy parts according to claim 1, characterized in that: The outer wall of the extension rod (1) is also provided with evenly arranged air guide grooves (15), and the air guide grooves (15) correspond to the heat dissipation holes (14).

3. The tool structure for dry cutting of automotive aluminum alloy parts according to claim 1, characterized in that: The outer wall of the reinforcement ring (3) is also provided with evenly distributed arc-shaped wind rods (32) and heat dissipation openings (33), and evenly distributed heat dissipation plates (34) are also provided inside the heat dissipation openings (33).

4. The tool structure for dry cutting of automotive aluminum alloy parts according to claim 1, characterized in that: An elastic member (16) is also fixedly connected inside the extension rod (1), and the elastic member (16) cooperates with the connecting seat (21).

5. The tool structure for dry cutting of automotive aluminum alloy parts according to claim 1, characterized in that: The outer wall of the cutter head (2) is also coated with an aluminum titanium nitride coating (24).

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