Numerical control machine tool cooling liquid circulation system and control method

Abstract

The invention relates to the technical field of numerical control machine tools, in particular to a numerical control machine tool cooling liquid circulating system and a control method.The numerical control machine tool cooling liquid circulating system comprises a water collecting tank used for collecting cooled cooling liquid, a circulating pump and an air cooling radiator, a flow guide plate is installed on the inner side of the upper end of the water collecting tank through a supporting mechanism, and a filtering mechanism is installed in the middle of the bottom end of the water collecting tank; a connecting short pipe is installed at the lower end of the filtering mechanism, the connecting short pipe penetrates through the water collecting tank to be connected with a pipeline provided with a water thermometer, and the pipeline provided with the water thermometer is connected with an air cooling radiator. And meanwhile, in the cooling liquid circulation process, the scraper is driven to rotate through cooling liquid circulation power, the surface of the filter screen can be cleaned in real time, then the cleaning and maintaining period of the filter screen is shortened, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and in particular to a cooling liquid circulation system and a control method for numerically controlled machine tools. Background Art

[0002] The coolant circulation system of CNC machine tools is a device used to reduce the high temperature generated by friction and cutting heat in the machine tool spindle, tool and workpiece during the machining process; It uses a circulating pump to transport coolant from the reservoir to the processing area of the machine tool. After absorbing heat, it flows back to the reservoir and is filtered and cooled by a cooling device (such as a cooler or radiator), thereby realizing the recycling of coolant. This system can not only effectively reduce the temperature of the processing area, reduce thermal deformation, and improve processing accuracy, but also flush away chips, protect tools and machine tool parts, and extend their service life. It is an indispensable auxiliary system in the processing of CNC machine tools. During the operation of the coolant circulation system of CNC machine tools, filtering the waste chips in the circulating coolant is an important part, which is generally achieved through a filter. Since there are many fine particles in the waste chips, they will adhere to the surface of the filter. Long-term operation will affect the filtering effect of the filter, requiring frequent and regular cleaning, affecting production efficiency. Therefore, a coolant circulation system and control method for CNC machine tools are proposed to address the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a CNC machine tool coolant circulation system and control method to solve the problem that during the operation of the CNC machine tool coolant circulation system, the waste chips in the circulating coolant are filtered, which is an important link and is generally achieved through a filter. Since there are many fine particles in the waste chips, they will adhere to the surface of the filter. Long-term operation will affect the filtering effect of the filter, requiring frequent and regular cleaning, affecting production efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions: A coolant circulation system and control method for a numerically controlled machine tool, comprising a water collecting tank for collecting the coolant after cooling is completed, a circulation pump and an air-cooled radiator, a guide plate being installed on the inner side of the upper end of the water collecting tank through a supporting mechanism, a filtering mechanism being installed in the middle of the bottom end of the water collecting tank, a connecting short pipe being installed at the lower end of the filtering mechanism, the connecting short pipe passing through the water collecting tank and connected to a pipe equipped with a water temperature gauge, the pipe equipped with the water temperature gauge being connected to the air-cooled radiator, the drain outlet of the air-cooled radiator being fixedly connected to the water inlet of the circulation pump through a connecting elbow; The filtering mechanism includes a telescopic tube, a buoyancy plate is fixedly connected to the outer side of the movable end of the telescopic tube, a rotating ring plate is rotatably connected to the inner side of the upper end of the telescopic tube, the upper edge of the rotating ring plate is provided with guide blades distributed in a circular shape at equal intervals, a hollow water inlet column is fixedly connected in the middle of the rotating ring plate, and oblique holes are opened in a circular shape at equal intervals on the inner side of the water inlet column, a filter screen is fixedly connected to the top end of the telescopic tube, a scraper is installed on the upper end of the filter screen, a drain outlet for connecting to a connecting short pipe is opened at the bottom end of the telescopic tube, and a center column is fixedly connected in the middle of the upper end of the water inlet column.

[0005] As a further optimized content of the present invention, the support mechanism includes a support column, the upper end of the support column is fixedly connected to the guide plate, the lower end of the support column is plugged into the base, and the base is welded and fixed to the bottom end of the water collecting tank.

[0006] As a further optimization of the present invention, two layers of diverter blocks distributed in a rectangular array are fixedly connected to the inner side of the upper end of the water collecting tank, the two layers of diverter blocks are staggered, and the vertical cross-section of the diverter blocks is a triangle.

[0007] As a further optimization of the present invention, the filter screen includes a cylindrical cover, multiple layers of filter holes are distributed in a ring shape around the cover, and a connecting hole is opened in the middle of the upper end of the cover.

[0008] As a further optimized content of the present invention, wherein: the cover shell is rotatably connected to the central column through a connecting hole, and the connecting hole and the central column are coaxially arranged.

[0009] As a further optimized content of the present invention, the scraper includes a bent rod, a center hole is opened in the middle of the bent rod, and cleaning grooves are opened at the lower ends of both sides of the bent rod.

[0010] As a further optimization of the present invention, the bent rod is U-shaped, the cleaning slot opening is arranged on a side close to the filter screen, and the center hole is fixedly connected to the portion of the center column exposed in the cover shell.

[0011] As a further optimization of the present invention, the water temperature meter is electrically connected to the air-cooled radiator, and the operating rules of the air-cooled radiator are: When the water temperature meter detects that the water temperature exceeds the preset threshold, the air-cooled radiator automatically starts and increases the cooling power; When the water temperature is lower than the preset threshold, the air-cooled radiator reduces the cooling power or stops running.

[0012] As a further optimization of the present invention, the following steps are included: Step 1: Equipment installation: The water collecting tank is installed as a whole on the lower side of the machine tool processing station, and the circulation pump outlet is connected to the spray gun used to cool the processing area. After the connection is completed, the cooling liquid is injected into the water collecting tank, and the entire equipment is powered on and tested. After the test run is completed, it is put into use; Step 2: Equipment operation: During the operation of the equipment, the filter screen is exposed to the coolant by the buoyancy plate. The coolant enters the filter screen through the lower half of the filter screen. Under the suction of the circulating pump, the coolant enters the telescopic tube through the inclined hole on the inner side of the water inlet column, and circulates under the action of the circulating pump. When the coolant enters the telescopic tube, the flow of the coolant will drive the rotating ring plate to rotate through the guide vanes, and then drive the center column to rotate. During the rotation of the center column, the scraper is driven to rotate, which is used to drive the cleaning trough to clean the debris attached to the outside of the filter screen. Step 3: Filter replacement: After the equipment has been running for a period of time, the staff will remove the filter from the inside of the equipment for replacement. The frequency of filter replacement is related to the operating time of the equipment; Step 4: Post-cleaning: When replacing the coolant inside the water collecting tank, the debris remaining inside the water collecting tank should be cleaned at the same time.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the water inlet is arranged at the upper end of the coolant storage tank by setting the filtering mechanism. The filter pressure of the filter screen can be reduced by the sedimentation of waste chips. At the same time, during the circulation of the coolant, the scraper is driven by the coolant circulation power to rotate, which can clean the surface of the filter screen in real time, thereby reducing the cleaning and maintenance cycle of the filter screen and effectively improving the production efficiency. 2. In the present invention, the diverter block is provided, and the dripping coolant can be further broken up when the coolant drips from the periphery of the guide plate, thereby increasing the heat dissipation area of this part of the cooling, and in actual use, the physical heat dissipation effect of the coolant can be effectively improved; 3. In the present invention, the water temperature meter is provided to monitor the coolant temperature in real time, and cooperates with the air-cooled radiator to stop the operation of the air-cooled radiator when the coolant temperature meets the heat dissipation requirements, thereby saving more energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation position structure of the filter mechanism of the present invention; Figure 3 This is a schematic diagram of the base structure of the present invention; Figure 4 This is a schematic diagram of the filter mechanism structure of the present invention; Figure 5 This is a schematic diagram of the guide vane installation position structure of the present invention; Figure 6 This is a schematic diagram of the filter structure of the present invention; Figure 7 This is a schematic diagram of the scraper structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point A in the middle.

[0015] In the figure: 1. Water collecting tank; 2. Circulation pump; 3. Air-cooled radiator; 4. Water temperature gauge; 5. Deflector; 6. Support mechanism; 61. Support column; 62. Base; 7. Connect the short pipe; 8. Connect the elbow; 9. Filter mechanism; 91. Telescopic tube; 92. Buoyancy plate; 93. Drain outlet; 94, filter screen; 941, cover; 942, filter hole; 943, connection hole; 95, scraper; 951, bent rod; 952, center hole; 953, cleaning slot; 96. Rotating ring plate; 97. Guide vane; 98. Water inlet column; 99. Center column; 910. Inclined hole; 10. Diverter block. DETAILED DESCRIPTION

[0016] See also Figure 1-8 , the present invention provides a technical solution: A CNC machine tool coolant circulation system and control method, including a water collecting tank 1 for collecting coolant after cooling, a circulation pump 2 and an air-cooled radiator 3, a guide plate 5 is installed on the inner side of the upper end of the water collecting tank 1 through a support mechanism 6, a filter mechanism 9 is installed in the middle of the bottom end of the water collecting tank 1, a connecting short pipe 7 is installed at the lower end of the filter mechanism 9, the connecting short pipe 7 passes through the water collecting tank 1 and is connected to a pipe installed with a water temperature gauge 4, the pipe installed with the water temperature gauge 4 is connected to the air-cooled radiator 3, and the drain outlet of the air-cooled radiator 3 is fixedly connected to the water inlet of the circulation pump 2 through a connecting elbow 8; the filter mechanism 9 includes a telescopic Tube 91, the outer side of the movable end of the telescopic tube 91 is fixedly connected to the buoyancy plate 92, the inner side of the upper end of the telescopic tube 91 is rotatably connected to the rotating ring plate 96, the upper edge of the rotating ring plate 96 is annularly and equidistantly distributed with guide blades 97, the middle of the rotating ring plate 96 is fixedly connected to a hollow water inlet column 98, the inner side of the water inlet column 98 is annularly and equidistantly provided with inclined holes 910, the top of the telescopic tube 91 is fixedly connected to the filter screen 94, the upper end of the filter screen 94 is provided with a scraper 95, the bottom end of the telescopic tube 91 is provided with a drain outlet 93 for connecting to the connecting short tube 7, and the middle of the upper end of the water inlet column 98 is fixedly connected to a center column 99.

[0017] As a further technical solution implemented in this solution, the support mechanism 6 includes a support column 61, the upper end of the support column 61 is fixedly connected to the guide plate 5, the lower end of the support column 61 is plugged into the base 62, and the base 62 is welded and fixed to the bottom end of the water collecting tank 1. Through the above arrangement, the guide plate 5 can be stably supported, and it is convenient to remove the guide plate 5 from the inside of the water collecting tank 1 at a later time; As a further technical solution for implementing this solution, two layers of diverter blocks 10 arranged in a rectangular array are fixedly connected to the inner side of the upper end of the water collecting tank 1. The two layers of diverter blocks 10 are staggered, and the vertical cross-section of the diverter blocks 10 is triangular. Through the above arrangement, the antifreeze liquid flowing out of the edge of the guide plate 5 can be split, thereby increasing the heat dissipation surface of the antifreeze liquid and improving the physical cooling effect of the system; As a further technical solution for implementing this solution, the filter screen 94 includes a cylindrical housing 941 having multiple layers of filter holes 942 distributed in an annular pattern around the housing 941. A connecting hole 943 is provided in the middle of the upper end of the housing 941. The housing 941 is rotatably connected to the center column 99 via the connecting hole 943. The connecting hole 943 and the center column 99 are coaxially arranged. This arrangement allows for stable filtration of the coolant entering the telescopic tube 91. As a further technical solution for implementing this solution, the scraper 95 includes a curved rod 951, a central hole 952 is formed in the middle of the curved rod 951, and cleaning grooves 953 are formed at the lower ends of both sides of the curved rod 951. The curved rod 951 is U-shaped, and the opening of the cleaning groove 953 is set on the side close to the filter 94. The central hole 952 is fixedly connected to the portion of the central column 99 exposed in the cover 941. Through the above arrangement, debris on the surface of the filter 94 can be processed, thereby ensuring the filtering effect of the filter 94. As a further technical solution for implementing this solution, the water temperature meter 4 and the air-cooled radiator 3 are electrically connected, and the operating rules of the air-cooled radiator 3 are as follows: When the water temperature meter 4 detects that the water temperature exceeds the preset threshold, the air-cooled radiator 3 automatically starts and increases the cooling power; When the water temperature is lower than the preset threshold, the air-cooled radiator 3 reduces the heat dissipation power or stops operating. According to this operating rule, the operation of the air-cooled radiator 3 can be stopped when the physical heat dissipation of the coolant meets the requirements, which has a good energy-saving effect. As a technical solution for further implementation of this solution, step 1: equipment installation: the water collecting tank 1 is installed as a whole on the lower side of the machine tool processing station, and the drainage outlet of the circulating pump 2 is connected to the spray gun used to cool the processing area. After the connection is completed, the cooling liquid is injected into the water collecting tank 1, and the entire equipment is powered on and tested. After the test run is completed, it is put into use; Step 2: Equipment Operation: During equipment operation, under the action of the buoyancy plate 92, one-half of the filter screen 94 is exposed to the outside of the coolant. The coolant enters the filter screen 94 through the lower half of the filter screen 94. Under the suction of the circulation pump 2, the coolant enters the telescopic tube 91 through the inclined hole 910 provided on the inner side of the water inlet column 98, and circulates under the action of the circulation pump 2. When the coolant enters the telescopic tube 91, the flow of the coolant drives the rotating ring plate 96 through the guide vanes 96, thereby driving the central column 99 to rotate. During the rotation of the central column 99, the scraper 95 is driven to rotate, thereby driving the cleaning groove 953 to clean the debris attached to the outside of the filter screen 94. Step 3: Filter replacement: After the equipment has been running for a period of time, the staff will remove the filter 94 from the inside of the equipment for replacement. The frequency of filter replacement is related to the operating time of the equipment. Step 4: Later cleaning: During the later replacement of the coolant inside the water collecting tank 1, the debris remaining inside the water collecting tank 1 is cleaned simultaneously.

[0018] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A coolant circulation system for a CNC machine tool, comprising a water collecting tank (1) for collecting the coolant after cooling, a circulation pump (2) and an air-cooled radiator (3), characterized in that: A guide plate (5) is installed on the inner side of the upper end of the water collecting tank (1) through a supporting mechanism (6), a filtering mechanism (9) is installed in the middle of the bottom end of the water collecting tank (1), and a connecting short pipe (7) is installed at the lower end of the filtering mechanism (9), and the connecting short pipe (7) passes through the water collecting tank (1) and is connected to a pipe installed with a water temperature gauge (4), and the pipe installed with the water temperature gauge (4) is connected to the air-cooled radiator (3), and the drain outlet of the air-cooled radiator (3) is fixedly connected to the water inlet of the circulation pump (2) through a connecting elbow (8); The filtering mechanism (9) comprises a telescopic tube (91), the outer side of the movable end of the telescopic tube (91) is fixedly connected to a buoyancy plate (92), the inner side of the upper end of the telescopic tube (91) is rotatably connected to a rotating ring plate (96), the upper edge of the rotating ring plate (96) is provided with guide blades (97) distributed in an annular manner and at equal intervals, the middle of the rotating ring plate (96) is fixedly connected to a hollow water inlet column (98), the inner side of the water inlet column (98) is provided with oblique holes (910) in an annular manner and at equal intervals, the top end of the telescopic tube (91) is fixedly connected to a filter screen (94), the upper end of the filter screen (94) is provided with a scraper (95), the bottom end of the telescopic tube (91) is provided with a drain outlet (93) for connecting to the connecting short pipe (7), and the middle of the upper end of the water inlet column (98) is fixedly connected to a center column (99).

2. A CNC machine tool coolant circulation system according to claim 1, characterized in that: The support mechanism (6) comprises a support column (61), the upper end of the support column (61) is fixedly connected to the guide plate (5), the lower end of the support column (61) is plugged into the base (62), and the base (62) is welded and fixed to the bottom end of the water collecting tank (1).

3. The coolant circulation system for a CNC machine tool according to claim 1, characterized in that: Two layers of diversion blocks (10) distributed in a rectangular array are fixedly connected to the inner side of the upper end of the water collecting tank (1), and the two layers of diversion blocks (10) are staggered. The vertical cross-section of the diversion blocks (10) is triangular.

4. The coolant circulation system for a CNC machine tool according to claim 1, characterized in that: The filter screen (94) comprises a cylindrical cover (941), with multiple layers of filter holes (942) distributed in an annular pattern around the cover (941), and a connection hole (943) is provided in the middle of the upper end of the cover (941).

5. The coolant circulation system for a CNC machine tool according to claim 4, characterized in that: The cover shell (941) is rotatably connected to the central column (99) via a connecting hole (943), and the connecting hole (943) and the central column (99) are coaxially arranged.

6. The coolant circulation system for a CNC machine tool according to claim 1, characterized in that: The scraper (95) comprises a curved rod (951), a central hole (952) is provided in the middle of the curved rod (951), and cleaning grooves (953) are provided at the lower ends of both sides of the curved rod (951).

7. The coolant circulation system for a CNC machine tool according to claim 6, characterized in that: The bent rod (951) is U-shaped, the opening of the cleaning slot (953) is arranged on a side close to the filter screen (94), and the central hole (952) is fixedly connected to the portion of the central column (99) exposed in the housing (941).

8. The coolant circulation system for a CNC machine tool according to claim 1, characterized in that: The water temperature meter (4) and the air-cooled radiator (3) are electrically connected, and the operating rules of the air-cooled radiator (3) are as follows: When the water temperature meter (4) detects that the water temperature exceeds a preset threshold, the air-cooled radiator (3) automatically starts and increases the heat dissipation power; When the water temperature is lower than a preset threshold, the air-cooled radiator (3) reduces the cooling power or stops operating.

9. A coolant circulation system for a CNC machine tool according to any one of claims 1 to 8, characterized in that: Step 1: Equipment installation: Install the water collecting tank (1) as a whole on the lower side of the machine tool processing station, and connect the drainage outlet of the circulation pump (2) to the spray gun used to cool the processing area. After the connection is completed, inject cooling liquid into the water collecting tank (1), and power on the entire equipment, test run, and put it into use after the test run is completed; Step 2: Equipment operation: During the operation of the equipment, under the action of the buoyancy plate (92), one-half of the filter screen (94) is exposed to the outside of the coolant, and the coolant enters the inside of the filter screen (94) through the position of the lower half of the filter screen (94). Under the suction action of the circulation pump (2), the coolant enters the inside of the telescopic tube (91) through the inclined hole (910) opened on the inner side of the water inlet column (98), and circulates under the action of the circulation pump (2); When the coolant enters the telescopic tube (91), the flow of the coolant drives the rotating ring plate (96) to rotate through the guide vanes (96), thereby driving the central column (99) to rotate. During the rotation of the central column (99), the scraper (95) is driven to rotate, thereby driving the cleaning trough (953) to clean the debris attached to the outside of the filter screen (94); Step 3: Filter replacement: After the device has been running for a period of time, the staff will remove the filter (94) from the inside of the device for replacement. The frequency of filter replacement (94) is related to the operating time of the device; Step 4: Post-cleaning: During the post-replacement process of the coolant inside the water collecting tank (1), the debris remaining inside the water collecting tank (1) is cleaned simultaneously.

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