Heat dissipation structure for high-precision numerical control machine tool driving device

Abstract

The utility model provides a heat dissipation structure for a high-precision numerical control machine tool driving device, and relates to the field of heat dissipation equipment for the high-precision numerical control machine tool driving device, the heat dissipation structure comprises a numerical control machine tool assembly and a monitoring assembly, the numerical control machine tool assembly comprises a base and a main shaft protective cover, and the main shaft protective cover is used for installing a main shaft driving mechanism; a water cooling assembly is installed in an inner cavity of the base and used for providing water cooling heat dissipation for the main shaft, and a filtering assembly is installed on the back face of the numerical control machine tool assembly and comprises a filtering tank, a top cover, a supporting plate, a filter element, a backflow pipe, a water outlet pipe, a fixing plate and a supporting rod. By arranging the filtering assembly and the monitoring assembly, the effect of filtering cooling water can be achieved, fine impurities in the cooling water can be intercepted through cooperation of the filtering tank, the top cover, the supporting plate, the filter element, the backflow pipe and the water outlet pipe, and therefore it can be guaranteed that the cooling water is clean, and the impurities are prevented from influencing the service life of the main shaft.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation equipment for high-precision CNC machine tool drive devices, specifically a heat dissipation structure for high-precision CNC machine tool drive devices. Background Technology

[0002] A high-precision CNC machine tool is a CNC machining equipment with high precision, high efficiency, and high stability. It consists of multiple parts, including a CNC system, mechanical structure, drive device, and electrical system. These parts work closely together to achieve high-precision machining. The drive device of a high-precision CNC machine tool is the drive component of the CNC machine tool's actuator, including the spindle drive unit, feed unit, spindle motor, and feed motor. Under the control of the CNC device, they drive the machine tool spindle, tool post, and worktable to precisely position or perform strict relative movements along a specified trajectory through mechanical transmission components, ultimately machining the parts required by the drawings. The machine tool spindle is responsible for driving the workpiece or tool to rotate, and the performance of the spindle directly affects the machining accuracy, efficiency, and stability of the machine tool.

[0003] Machine tool spindles generate a lot of heat when running at high speeds, so effective heat dissipation measures are needed to prevent overheating, which could lead to performance degradation or damage. Spindle cooling is usually achieved through water cooling, which involves placing water cooling pipes around the spindle and using the circulation of cooling water to remove heat. While existing technologies can cool the spindle by circulating cooling water, the cooling medium, such as water or coolant, lacks filtration during circulation. Since spindles have very high precision requirements, even tiny impurities can affect spindle performance and thus easily shorten its service life.

[0004] In summary, this utility model provides a heat dissipation structure for a high-precision CNC machine tool drive device to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A heat dissipation structure for a high-precision CNC machine tool drive device includes a CNC machine tool assembly and a monitoring assembly. The CNC machine tool assembly includes a base and a spindle protective cover. The spindle protective cover is used to install the spindle drive mechanism. A water-cooling assembly is installed in the inner cavity of the base to provide water-cooled heat dissipation for the spindle. A filter assembly is installed on the back of the CNC machine tool assembly to filter cooling water. The filter assembly includes a filter tank, a top cover, a support plate, a filter element, a return pipe, a water outlet pipe, a fixing plate, and a support rod. The fixing plate is fixedly connected to the filter tank. One end of the support rod is fixedly connected to the top cover, and the other end of the support rod is movably connected to the fixing plate via a rotating shaft. One end of the water outlet pipe is connected to the outlet of the filter tank, and the other end of the water outlet pipe extends through the base. The filter tank has an inner cavity, with one end of the return pipe connected to the inlet of the filter tank and the other end connected to the return end of the main shaft cooling water. The support plate and filter element are both installed in the inner cavity of the filter tank. The top cover is located on the top of the filter tank and is movably connected to the filter tank by a hinge bolt. The monitoring component is used to monitor the operating status of the filter component. The monitoring component includes a PLC control host, a first pressure sensor, a second pressure sensor, a remote pressure gauge, and a radar level gauge. The first pressure sensor is installed on the surface of the return pipe, the second pressure sensor is installed on the surface of the outlet pipe, and the remote pressure gauge is installed on the surface of the top cover. The outputs of the first pressure sensor, the second pressure sensor, the remote pressure gauge, and the radar level gauge are all connected to the input of the PLC control host.

[0007] Furthermore, in this utility model, the water-cooling assembly includes a water tank, a water chiller, a delivery pump, a delivery pipe, a circulation pipe, and a connecting pipe, wherein the water tank, the water chiller, and the delivery pump are all fixed within the inner cavity of the base.

[0008] Furthermore, in this utility model, one end of the connecting pipe is connected to the inlet of the delivery pump, the other end of the connecting pipe is connected to the outlet of the water tank, one end of the delivery pipe is connected to the outlet of the delivery pump, and the other end of the delivery pipe is connected to the inlet of the spindle cooling water.

[0009] Furthermore, in this utility model, one end of the water outlet pipe located in the inner cavity of the base is connected to the inlet of the water chiller, one end of the circulation pipe is connected to the outlet of the water chiller, and the other end of the circulation pipe is connected to the inner cavity of the water tank.

[0010] Furthermore, in this invention, the output terminal of the PLC control host is connected to the input terminals of the delivery pump and the water chiller, respectively, and the radar level gauge is installed on the top of the water tank.

[0011] Furthermore, in this utility model, the CNC machine tool assembly also includes a protective door, a fan, and a cover plate. The cover plate is installed on the surface of the base and is threadedly connected to the base by bolts.

[0012] Furthermore, in this invention, the protective door is hinged to the spindle protective cover via a hinge, the protective door is mounted on the surface of the fan, and the fan is used to ventilate the inner cavity of the spindle protective cover.

[0013] Beneficial effects: This utility model has the following beneficial effects:

[0014] This invention achieves the effect of filtering cooling water by setting up a filtration component and a monitoring component. Through the cooperation of the filter tank, top cover, support plate, filter element, return pipe and outlet pipe, it can intercept small impurities in the cooling water, thereby ensuring the cleanliness of the cooling water and preventing impurities from affecting the service life of the spindle. Through the cooperation of PLC control host, first pressure sensor, second pressure sensor, remote pressure gauge and radar level gauge, the operating status of the filtration component can be monitored in real time, thereby ensuring the stability of the filtration component's operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the CNC machine tool assembly and the water cooling assembly of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the water-cooling component and the filter component of this utility model;

[0018] Figure 4 This is a schematic diagram of the separated state structure of the filter element and the filter canister of this utility model;

[0019] Figure 5 This is a schematic diagram of the system flow of this utility model.

[0020] In the picture:

[0021] 1. CNC machine tool components; 101. Base; 102. Spindle guard; 103. Protective door; 104. Fan; 105. Cover plate; 2. Water cooling components; 201. Water tank; 202. Water chiller; 203. Transfer pump; 204. Transfer pipe; 205. Circulation pipe; 206. Connecting pipe; 3. Filter components; 301. Filter tank; 302. Top cover; 303. Support plate; 304. Filter element; 305. Return pipe; 306. Water outlet pipe; 307. Fixing plate; 308. Support rod; 4. Monitoring components; 401. PLC control host; 402. First pressure sensor; 403. Second pressure sensor; 404. Remote pressure gauge; 405. Radar level gauge. Detailed Implementation

[0022] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0023] Example 1

[0024] like Figure 1-5 As shown, this is the first embodiment of the present invention. This embodiment provides a heat dissipation structure for a high-precision CNC machine tool drive device, including a CNC machine tool assembly 1 and a monitoring assembly 4. The CNC machine tool assembly 1 includes a base 101 and a spindle protective cover 102. The spindle protective cover 102 is used to install the spindle drive mechanism. A water cooling assembly 2 is installed in the inner cavity of the base 101. The water cooling assembly 2 is used to provide water cooling for the spindle. A filter assembly 3 is installed on the back of the CNC machine tool assembly 1. The filter assembly 3 is used to filter... The filtration assembly 3 for filtering cooling water includes a filter tank 301, a top cover 302, a support plate 303, a filter element 304, a return pipe 305, an outlet pipe 306, a fixing plate 307, and a support rod 308. The fixing plate 307 is fixedly connected to the filter tank 301. One end of the support rod 308 is fixedly connected to the top cover 302, and the other end of the support rod 308 is movably connected to the fixing plate 307 via a rotating shaft. One end of the outlet pipe 306 is connected to the outlet of the filter tank 301, and the other end of the outlet pipe 306 is connected to the outlet of the filter tank 301. The return pipe 305 extends through the inner cavity of the base 101. One end of the return pipe 305 is connected to the inlet of the filter tank 301, and the other end of the return pipe 305 is connected to the return end of the spindle cooling water. The support plate 303 and the filter element 304 are both installed in the inner cavity of the filter tank 301. The top cover 302 is located on the top of the filter tank 301 and is movably connected to the filter tank 301 by a hinge bolt. The monitoring component 4 is used to monitor the operating status of the filter component 3. The monitoring component 4 includes a PLC control host 401 and a first pressure transmitter. The system includes a first pressure sensor 402, a second pressure sensor 403, a remote pressure gauge 404, and a radar level gauge 405. The first pressure sensor 402 is mounted on the surface of the return pipe 305, the second pressure sensor 403 is mounted on the surface of the outlet pipe 306, and the remote pressure gauge 404 is mounted on the surface of the top cover 302. The output terminals of the first pressure sensor 402, the second pressure sensor 403, the remote pressure gauge 404, and the radar level gauge 405 are all connected to the input terminals of the PLC control host 401.

[0025] like Figure 1-5As shown, the spindle cooling water enters the inner cavity of the filter tank 301 through the return pipe 305. The surface of the support plate 303 has several holes through which the filter element 304 is inserted. The number of holes is equal to the number of filter elements 304. The cooling water is filtered through the filter element 304, which can be made of PP cotton material to intercept fine particles in the cooling water. The filtered cooling water is delivered to the water cooling assembly 2 through the outlet pipe 306. The remote pressure gauge 404 can monitor the pressure inside the filter tank 301. The first pressure sensor 402 is used to monitor the inlet water pressure, and the second pressure sensor 403 is used to monitor the outlet water pressure. The first pressure sensor 402 and the second pressure sensor 403 can monitor the inlet and outlet water pressures in real time. When the pressure difference exceeds the preset threshold, it is determined that the filter element 304 is blocked. This allows for real-time monitoring of the operating status of the filter assembly 3, ensuring the stability of the filter assembly 3. The fixing plate 307 and the support rod 308 can provide support for the disassembled top cover 302.

[0026] Example 2

[0027] Reference Figure 2 and 3 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0028] In this embodiment, the water-cooling assembly 2 includes a water tank 201, a water chiller 202, a delivery pump 203, a delivery pipe 204, a circulation pipe 205, and a connecting pipe 206. The water tank 201, the water chiller 202, and the delivery pump 203 are all fixed to the inner cavity of the base 101.

[0029] One end of the connecting pipe 206 is connected to the inlet of the delivery pump 203, and the other end of the connecting pipe 206 is connected to the outlet of the water tank 201. One end of the delivery pipe 204 is connected to the outlet of the delivery pump 203, and the other end of the delivery pipe 204 is connected to the inlet of the spindle cooling water.

[0030] One end of the outlet pipe 306 located in the inner cavity of the base 101 is connected to the inlet of the water chiller 202, one end of the circulation pipe 205 is connected to the outlet of the water chiller 202, and the other end of the circulation pipe 205 is connected to the inner cavity of the water tank 201.

[0031] like Figure 2 and 3As shown, the cooling water filtered by the filter assembly 3 first enters the water chiller 202, where it is cooled. The water chiller 202 consists of a compressor, evaporator, condenser, expansion valve, built-in water pump, and auxiliary piping components. It can provide constant temperature, constant flow, and constant pressure cooling water. The model of the water chiller 202 can be ICA-3. After cooling, the cooling water flows back to the inner cavity of the water tank 201 through the circulation pipe 205. The top of the water tank 201 is also equipped with a cover. Cooling water will be lost during the circulation process. When the water level in the inner cavity of the water tank 201 is too low, the cover can be opened to replenish the inner cavity of the water tank 201. The centrifugal force generated by the high-speed rotation of the delivery pump 203 draws the cooling water from the inner cavity of the water tank 201 through the connecting pipe 206 and delivers it to the spindle through the delivery pipe 204, thereby achieving water cooling heat dissipation for the spindle.

[0032] Example 3

[0033] Reference Figure 1 and 2 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0034] In this embodiment, the output terminal of the PLC control host 401 is connected to the input terminals of the delivery pump 203 and the water chiller 202, respectively, and the radar level gauge 405 is installed on the top of the water tank 201.

[0035] The output of the PLC control host 401 is connected to the input of the delivery pump 203 and the water chiller 202 respectively, and the radar level gauge 405 is installed on the top of the water tank 201.

[0036] The protective door 103 is hinged to the spindle guard 102 via a hinge. The protective door 103 is mounted on the surface of the fan 104, which is used to ventilate the inner cavity of the spindle guard 102.

[0037] like Figure 1 and 2 As shown, the PLC control host 401 is installed on the surface of the CNC machine tool body. The PLC control host 401 determines whether the filter element 304 is blocked by collecting data from the first pressure sensor 402, the second pressure sensor 403 and the remote pressure gauge 404. The PLC control host 401 is also connected to the alarm system of the CNC machine tool. When the filter element 304 is blocked, the alarm information can be issued in time through the alarm system. The cover plate 105 is used to seal the inner cavity of the base 101. The surface of the cover plate 105 is provided with a through groove. The through groove can keep the air in the inner cavity of the base 101 circulating, so as to ventilate and dissipate heat for the water cooling component 2. The fan 104 is used to ventilate the inner cavity of the spindle protective cover 102.

[0038] In operation, spindle cooling water enters the inner cavity of filter tank 301 through return pipe 305. The surface of support plate 303 has several holes through which filter elements 304 are inserted. The number of holes equals the number of filter elements 304. Cooling water is filtered through filter elements 304, which can be made of PP cotton to intercept fine particles in the cooling water. The filtered cooling water is then transported to water chiller 202 for cooling through outlet pipe 306. Remote pressure gauge 404 monitors the pressure inside filter tank 301. First pressure sensor 402 monitors the inlet pressure, and second pressure sensor 403 monitors the outlet pressure. The system can monitor the pressure of the inlet and outlet water in real time. When the pressure difference exceeds the preset threshold, it is determined that the filter element 304 is blocked. This allows for real-time monitoring of the operation of the filter assembly 3, ensuring the stability of its operation. The cooled water, after being cooled, flows back to the inner cavity of the water tank 201 through the circulation pipe 205. The top of the water tank 201 is also equipped with a cover. Cooling water will be lost during the circulation process. When the water level in the inner cavity of the water tank 201 is too low, the cover can be opened to replenish the inner cavity of the water tank 201. The centrifugal force generated by the high-speed rotation of the delivery pump 203 draws the cooling water in the inner cavity of the water tank 201 through the connecting pipe 206 and delivers it to the main shaft through the delivery pipe 204, thereby achieving water cooling heat dissipation for the main shaft.

[0039] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A heat dissipation structure for high-precision numerical control machine tool driving device, comprising a numerical control machine tool assembly (1) and a monitoring assembly (4), characterized in that: The numerical control machine tool assembly (1) includes a base (101) and a spindle protection cover (102) for installing a spindle driving mechanism, and the inner cavity of the base (101) is provided with a water cooling assembly (2) for providing water cooling heat dissipation for the spindle, and the back of the numerical control machine tool assembly (1) is provided with a filtering assembly (3) for filtering cooling water, and the filtering assembly (3) includes a filter tank (301), a top cover (302), a support plate (303), a filter element (304), a return pipe (305), a water outlet pipe (306), a fixed plate (307) and a support rod (308), the fixed plate (307) is fixedly connected with the filter tank (301), one end of the support rod (308) is fixedly connected with the top cover (302), the other end of the support rod (308) is movably connected with the fixed plate (307) through a rotating shaft, one end of the water outlet pipe (306) is communicated with the outlet of the filter tank (301), the other end of the water outlet pipe (306) penetrates into the inner cavity of the base (101), one end of the return pipe (305) is communicated with the inlet of the filter tank (301), and the other end of the return pipe (305) is communicated with the return end of the spindle cooling water, the support plate (303) and the filter element (304) are both installed in the inner cavity of the filter tank (301), the top cover (302) is located at the top of the filter tank (301) and is movably connected with the filter tank (301) through a hinge bolt, and the monitoring assembly (4) is used for monitoring the running state of the filtering assembly (3), and the monitoring assembly (4) includes a PLC control host (401), a first pressure sensor (402), a second pressure sensor (403), a remote pressure gauge (404) and a radar liquid level meter (405), the first pressure sensor (402) is installed on the surface of the return pipe (305), the second pressure sensor (403) is installed on the surface of the water outlet pipe (306), the remote pressure gauge (404) is installed on the surface of the top cover (302), and the output ends of the first pressure sensor (402), the second pressure sensor (403), the remote pressure gauge (404) and the radar liquid level meter (405) are connected with the input end of the PLC control host (401).

2. The heat dissipating structure for a high-precision numerical control machine tool driving device according to claim 1, characterized in that: The water cooling assembly (2) includes a water tank (201), a water cooling machine (202), a conveying pump (203), a conveying pipe (204), a circulating pipe (205) and a communication pipe (206), and the water tank (201), the water cooling machine (202) and the conveying pump (203) are fixed in the inner cavity of the base (101).

3. The heat dissipating structure for a high-precision numerical control machine tool driving device according to claim 2, wherein: the heat dissipating structure is provided with a plurality of heat dissipating fins. One end of the communication pipe (206) is communicated with the inlet of the conveying pump (203), the other end of the communication pipe (206) is communicated with the outlet of the water tank (201), one end of the conveying pipe (204) is communicated with the outlet of the conveying pump (203), and the other end of the conveying pipe (204) is communicated with the inlet of the spindle cooling water.

4. The heat dissipating structure for a high-precision numerical control machine tool driving device according to claim 2, wherein: The water outlet pipe (306) is located at one end of the inner cavity of the base (101) and communicates with the inlet of the water cooler (202), one end of the circulating pipe (205) communicates with the outlet of the water cooler (202), and the other end of the circulating pipe (205) communicates with the inner cavity of the water tank (201).

5. The heat dissipating structure for the high-precision numerical control machine tool driving device according to claim 1, wherein: the heat dissipating structure is characterized by comprising: a plurality of heat dissipating fins; and a plurality of heat dissipating grooves formed on the heat dissipating fins. The output end of the PLC control host (401) is connected with the input end of the conveying pump (203) and the water cooler (202) respectively, and the radar liquid level meter (405) is installed on the top of the water tank (201).

6. The heat dissipating structure for a high-precision numerical control machine tool driving device according to claim 1, wherein: The numerical control machine tool assembly (1) further comprises a protective door (103), a fan (104) and a cover plate (105), the cover plate (105) is installed on the surface of the base (101) and is threadedly connected with the base (101) through bolts.

7. The heat dissipating structure for a high-precision numerical control machine tool drive device according to claim 6, characterized in that: The protective door (103) is hinged to the main shaft protective cover (102) through a hinge, the protective door (103) is installed on the surface of the fan (104), and the fan (104) is used for ventilating the inner cavity of the main shaft protective cover (102).

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