A tool cooling device for use in a CNC machining process

Abstract

The utility model relates to numerical control machine tool field especially, a kind of tool cooling device for CNC machining process.The technical problem is current cooling device, it is difficult to reduce the temperature of tool and workpiece contact area by the way of spraying nitrogen, leading to the effect of cooling is not good, and inconvenient to reduce tool temperature while lubricating tool, leading to friction increase, thereby influence cooling efficiency.A kind of tool cooling device for CNC machining process, comprising: tool shaft;Tool on tool shaft;Fixed shell with guide cavity is opened, is fixedly connected on tool shaft.Nitrogen will be sprayed from nitrogen gas nozzle along sleeve and extension pipe, and the nitrogen gas sprayed can be sprayed on tool, since nitrogen gas vaporization can make temperature drop, and then cool tool before processing, directly reduce the temperature of tool and workpiece contact area.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tools, and in particular to a tool cooling device used in CNC machining. Background Technology

[0002] During CNC machining, the high-speed friction between the tool and the workpiece generates a large amount of cutting heat, which leads to accelerated tool wear, reduced machining accuracy, and even affects the surface quality of the workpiece. When cooling the tool, compressed gas is used to achieve the purpose of cooling the tool.

[0003] Since cutting tools may still fail due to thermal softening during machining, current cooling devices are unable to reduce the temperature of the contact area between the tool and the workpiece by spraying nitrogen, resulting in poor cooling effect. Furthermore, existing cooling devices are not convenient for lubricating the tool while reducing its temperature, leading to increased friction and thus affecting cooling efficiency. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, this utility model provides a tool cooling device for CNC machining. It can reduce the temperature of the contact area between the tool and the workpiece by spraying nitrogen gas to enhance the cooling effect, and can also lubricate the tool while cooling to reduce friction, thereby improving the cooling efficiency.

[0005] A tool cooling device for CNC machining, comprising:

[0006] Cutter shaft;

[0007] A cutting tool mounted on a tool shaft;

[0008] A fixed housing with a guide cavity is fixedly attached to the cutter shaft;

[0009] The mist cooling component is mounted on the fixed housing;

[0010] The cold blade assembly is mounted on the fixed housing.

[0011] Furthermore, the outlet of the guide cavity on the fixed shell has a narrow opening structure.

[0012] Furthermore, the mist cooling component includes: four branch pipes, all fixed to the fixed housing; a high-pressure air pipe connecting the four branch pipes; an air pipe connector on the high-pressure air pipe; a connecting pipe connected to the high-pressure air pipe; a water pipe connected to the connecting pipe; and a solenoid valve on the connecting pipe.

[0013] Furthermore, the cold knife assembly includes: a sleeve fixed to the fixed housing; an extension tube slidably connected to the sleeve; a nitrogen nozzle provided on the outlet of the extension tube; an electric push rod fixed to the fixed housing; and a connector fixed to the telescopic end of the electric push rod, the connector being fixedly connected to the extension tube.

[0014] Furthermore, the nitrogen nozzle has a flared structure.

[0015] The beneficial effects of this utility model are as follows: 1. Nitrogen gas will be sprayed out from the nitrogen nozzle along the sleeve and extension tube. The sprayed nitrogen gas will be sprayed onto the cutting tool. Since the temperature will drop when the nitrogen gas vaporizes, the cutting tool will be cooled before processing, which directly reduces the temperature of the contact area between the cutting tool and the workpiece.

[0016] 2. Water will flow into the high-pressure air pipe. Due to the airflow speed, water and air will flow out from the branch pipe. The outflowing water and air will produce water mist. Under the action of the guide cavity, the water mist will gather and blow towards the tool. The water mist will blow away the waste chips cut by the tool, thereby maintaining the temperature of the tool and reducing friction, thus enhancing the cooling effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a cross-sectional three-dimensional structural diagram of the present invention.

[0020] Figure 4 This is a partial cross-sectional perspective view of the three-dimensional structure of this utility model.

[0021] In the above attached diagram: 1: cutter shaft, 2: cutter, 3: fixed housing, 30: guide cavity, 4: high-pressure air pipe, 5: branch pipe, 6: air pipe connector, 7: connecting pipe, 8: water pipe, 9: solenoid valve, 10: sleeve, 11: extension pipe, 12: nitrogen nozzle, 13: electric push rod, 14: connector. Detailed Implementation

[0022] 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.

[0023] Example 1: A tool cooling device for CNC machining, such as... Figures 1-4 As shown, it includes:

[0024] Tool shaft 1;

[0025] The cutting tool 2 is mounted on the cutting shaft 1;

[0026] A fixed housing 3 with a guide cavity 30 is fixedly connected to the cutter shaft 1;

[0027] The mist cooling component is mounted on the fixed housing 3;

[0028] The cold blade assembly is mounted on the fixed housing 3.

[0029] The guide cavity 30 on the fixed shell 3 has a narrow outlet structure, which is used to gather airflow.

[0030] The mist cooling component includes: four branch pipes 5, all fixed to the fixed shell 3; a high-pressure air pipe 4 connecting the four branch pipes 5; an air pipe connector 6 on the high-pressure air pipe 4; a connecting pipe 7 connected to the high-pressure air pipe 4; a water pipe 8 connected to the connecting pipe 7; and a solenoid valve 9 on the connecting pipe 7.

[0031] The cold knife assembly includes: a sleeve 10 fixed to the fixed housing 3; an extension tube 11 slidably connected to the sleeve 10; a nitrogen nozzle 12 provided on the outlet of the extension tube 11; an electric push rod 13 fixed to the fixed housing 3; and a connector 14 fixed to the telescopic end of the electric push rod 13, the connector 14 being fixedly connected to the extension tube 11.

[0032] The nitrogen nozzle 12 has a flared structure, which is used to uniformly discharge nitrogen.

[0033] First, the operator connects a high-pressure gas source via air pipe connector 6, a water source via water pipe 8, and a nitrogen source via sleeve 10. Before CNC machining, the operator turns on the nitrogen source and then controls the extension end of the electric push rod 13 to extend at a uniform speed. As the extension end of the electric push rod 13 extends at a uniform speed, it drives the extension tube 11 downwards via connector 14. Simultaneously, nitrogen gas is sprayed from the nitrogen nozzle 12 along sleeve 10 and extension tube 11. The sprayed nitrogen gas is sprayed onto the tool 2. Because the temperature drops when the nitrogen vaporizes, it cools the tool 2 before machining, directly reducing the temperature of the contact area between the tool 2 and the workpiece. The operator controls the electric push rod 13 to retract, which drives the extension tube 11 to reset via the connector 14, and shuts off the nitrogen gas. Then, CNC machining is performed. During machining, the operator turns on the high-pressure gas source and water source, and simultaneously opens the solenoid valve 9. Water flows into the high-pressure gas pipe 4. Due to the airflow speed, water and airflow will flow out from the branch pipe 5. The outflowing water and airflow will generate water mist. Under the action of the guide cavity 30, the water mist will gather and blow towards the tool 2. The water mist will blow away the waste chips cut by the tool 2, thereby maintaining the temperature of the tool 2 and reducing friction, thus enhancing the cooling effect. After machining is completed, the operator turns off the gas source, water source, and solenoid valve 9.

[0034] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tool cooling device for CNC machining, characterized in that: include: Cutter shaft (1); A cutting tool (2) is mounted on a cutting shaft (1); A fixed shell (3) with a guide cavity (30) is fixedly connected to the cutter shaft (1); The mist cooling component is mounted on the fixed housing (3); The cold knife assembly is mounted on the fixed shell (3).

2. A tool cooling device for CNC machining as described in claim 1, characterized in that: The outlet of the guide cavity (30) on the fixed shell (3) has a narrow opening structure.

3. A tool cooling device for CNC machining as described in claim 1, characterized in that: The mist cooling component includes: four branch pipes (5), all fixed to the fixed shell (3); a high-pressure air pipe (4) connecting the four branch pipes (5); an air pipe connector (6) on the high-pressure air pipe (4); a connecting pipe (7) connected to the high-pressure air pipe (4); a water pipe (8) connected to the connecting pipe (7); and a solenoid valve (9) on the connecting pipe (7).

4. A tool cooling device for CNC machining as described in claim 3, characterized in that: The cold knife assembly includes: a sleeve (10) fixed to the fixed shell (3); an extension tube (11) slidably connected to the sleeve (10); a nitrogen nozzle (12) provided on the outlet of the extension tube (11); an electric push rod (13) fixed to the fixed shell (3); and a connector (14) fixed to the telescopic end of the electric push rod (13), the connector (14) being fixed to the extension tube (11).

5. A tool cooling device for CNC machining according to claim 4, characterized in that: The nitrogen nozzle (12) has a flared structure.

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