High-precision micro-cutting numerical control machine tool

Abstract

The utility model discloses a high-precision micro-cutting numerical control machine tool which comprises a machine tool body, a driving motor, a controller, an oil storage tank, a sediment tank and a filter tank. After standing, lubricating oil floats above the liquid level and is in contact with the lower wall of the oil absorption belt, the lubricating oil is taken away after rotation of the oil absorption belt, the lubricating oil on the surface of the oil absorption belt is scraped off through the oil scraper, and the scraped oil flows into the oil storage tank along the oil receiving guide plate. The cooling liquid after oil discharging is discharged to the cooling liquid collecting box through opening of the electromagnetic valve on the outer wall of the drainage pipe, and the lowest liquid level after discharging can be controlled to be not lower than the upper wall of the drainage pipe through the liquid level sensor, so that the lubricating oil floating above the liquid level cannot be discharged from the drainage pipe all the time, and the separation effect is good; the purity of the separated lubricating oil and cooling liquid is greatly improved, so that the cooling effect is guaranteed during recycling, and the machining precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a high-precision micro-cutting numerically controlled machine tool. Background Art

[0002] In the cutting of difficult-to-cut materials such as titanium alloys and high-strength steel, micro-cutting CNC machine tools are often used. They are equipped with program control systems and have high precision. In order to solve the heat generation during the machining process, when the CNC machine tool processes metal parts, it is necessary to spray lubricating oil and coolant on the workpiece processing. The lubricating liquid and coolant mixed with metal debris will flow into the machine tool. At present, the machine tool processing coolant is simply filtered and reused, and the cooling effect cannot be guaranteed, which greatly affects the machining accuracy. For this reason, there is a public technology on the market that proposes a water tank for high-precision micro-cutting CNC machine tools, including an oil storage tank, a filtering mechanism, and several water pumps. The filtering mechanism includes a supporting frame, several first filtering devices, and a second filtering device. The first filtering device includes a first box body and several filtering components. The filtering component includes a filter net and a drainage trough. The technology claims that it can The metal debris mixed in the lubricating oil and coolant is effectively filtered out, and the filtered oil and water in the oil storage tank can be pumped to the machine tool for reuse through a water pump. However, there are obvious disadvantages in the actual use of this technology. It is stated that the lubricating oil will float on the surface of the coolant in the filter tank, and the lubricating oil will enter the oil storage tank 13 through the second filter hole 140 on the filter plate 14, while the stratified coolant will remain in the filter tank 12. The coolant in the filter tank 12 can be drained away by opening the drain port 120. In fact, the floating height of the lubricating oil cannot be exactly the same as the height of the second filter hole 140, which makes the above-mentioned public technology impossible to be realized, and the lubricating oil and the coolant cannot be separated. For this reason, it is necessary to further improve the structure to improve the cooling efficiency during micro-cutting CNC machine tool processing and improve the quality of processed products. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a high-precision micro-cutting CNC machine tool.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-precision micro-cutting CNC machine tool, including a machine tool body, a drive motor, a controller, an oil storage tank, a sedimentation tank and a filter box, the sedimentation tank is fixedly connected to the right side of the oil storage tank and is located at the lower wall of the filter box, the inner rear wall of the sedimentation box and close to the right wall is provided with a liquid level detection structure for detecting the liquid level height, the inner wall of the sedimentation box is rotatably connected with a first rotating shaft, a second rotating shaft and a third rotating shaft, and the outer walls of the first rotating shaft, the second rotating shaft and the third rotating shaft are all fixed A transmission roller is fixedly connected, and an oil absorption belt is commonly sleeved on the outer walls of the three groups of transmission rollers. The driving motor is arranged on the front wall of the sedimentation box, and the third rotating shaft is driven to rotate by the driving motor. A square hole which runs through the oil storage tank and the sedimentation box on the opposite side is commonly arranged, and an oil receiving guide plate is connected to the inner left wall of the sedimentation box through an adjustable structure, and an oil scraping structure is arranged on the end of the oil receiving guide plate facing the oil absorption belt, and a limiting structure which is used to keep the oil absorption belt and the oil scraping structure tightly pressed against each other when the oil scraping structure is operating is arranged on the inner wall of the sedimentation box and below the third rotating shaft.

[0005] As a further description of the above technical solution:

[0006] A water inlet pipe is fixedly connected to the upper wall of the filter box, a water injection pipe runs through the filter box and the sedimentation box, a drain pipe is fixedly connected to the front wall of the sedimentation box near the lower wall, and an electromagnetic valve for controlling on and off is fixedly connected to the outer wall of the drain pipe and the outer wall of the water injection pipe.

[0007] As a further description of the above technical solution:

[0008] The adjustable structure includes two groups of supports and telescopic frames. The two groups of supports are distributed up and down and are fixedly connected to the inner left wall of the sedimentation box in sequence and are both located above the square hole. The two groups of telescopic frames are respectively slidably connected to the ends of the two groups of supports away from the inner left wall of the sedimentation box. The oil collecting guide plate is rotatably connected to the side of the two groups of telescopic frames away from the supports. The oil collecting guide plate and the telescopic frame, as well as the telescopic frame and the support are all locked by screws.

[0009] As a further description of the above technical solution:

[0010] The liquid level detection structure is a liquid level sensor, and the liquid level sensor is fixedly connected to the inner rear wall of the sedimentation tank through a bracket. The bracket is fixedly connected to the inner rear wall of the sedimentation tank and has a horizontal height higher than the first rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The oil scraping structure is an oil scraping knife, which is fixedly connected to the upper end of the oil receiving guide plate, and one end of the oil scraping knife away from the oil receiving guide plate abuts against the outer wall of the oil suction belt.

[0013] As a further description of the above technical solution:

[0014] The limiting structure is a limiting roller, which is rotatably connected to the inner wall of the sedimentation box and is located below the third rotating shaft, and the outer wall of the limiting roller is rollingly connected to the inner wall of the oil absorption belt.

[0015] As a further description of the above technical solution:

[0016] The first rotating shaft and the second rotating shaft are arranged horizontally, and the third rotating shaft is located at the upper left of the first rotating shaft.

[0017] As a further description of the above technical solution:

[0018] One end of the oil receiving guide plate away from the oil suction belt passes through the square hole and extends into the interior of the oil storage tank.

[0019] The utility model has the following beneficial effects:

[0020] Compared with the prior art, the high-precision micro-cutting CNC machine tool can control the liquid level in the sedimentation tank to maintain a position in contact with the lower wall of the oil absorption belt through a liquid level sensor and two sets of solenoid valves. After standing, the lubricating oil floats above the liquid surface and contacts the lower wall of the oil absorption belt. The lubricating oil is taken away by the rotation of the oil absorption belt, and the lubricating oil on the surface of the oil absorption belt is scraped off by an oil scraper. The scraped oil flows into the oil storage tank along the oil receiving guide plate. The coolant after the oil is discharged is discharged to the coolant collection tank through the solenoid valve on the outer wall of the drain pipe. The liquid level sensor can be used to control the minimum liquid level after discharge to be not lower than the upper wall of the drain pipe, so that the lubricating oil floating above the liquid surface will never be discharged from the drain pipe, and the separation effect is good. The purity of the lubricating oil and coolant after separation is greatly improved, so that the cooling effect is guaranteed during reuse, thereby effectively improving the machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-precision micro-cutting CNC machine tool proposed by the utility model;

[0022] Figure 2 This is a partial cross-sectional view of the internal structure of an oil storage tank and a sedimentation tank of a high-precision micro-cutting CNC machine tool proposed by the utility model;

[0023] Figure 3 A high-precision micro-cutting CNC machine tool proposed by the utility model Figure 2 A partial enlarged view of point A in the middle.

[0024] Legend:

[0025] 1. Oil storage tank; 2. Square hole; 3. Sedimentation tank; 4. Filter tank; 5. First rotating shaft; 6. Second rotating shaft; 7. Third rotating shaft; 8. Driving motor; 9. Drain pipe; 10. Solenoid valve; 11. Water inlet pipe; 12. Water injection pipe; 13. Transmission roller; 14. Oil suction belt; 15. Bracket; 16. Liquid level sensor; 17. Limit roller; 18. Support; 19. Telescopic bracket; 20. Oil guide plate; 21. Oil scraper. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figures 1 to 3 The utility model provides a high-precision micro-cutting CNC machine tool: including a machine tool body, a drive motor 8, a controller, an oil storage tank 1, a sedimentation tank 3 and a filter box 4. The sedimentation tank 3 is fixedly connected to the right side of the oil storage tank 1 and is located at the lower wall of the filter box 4. The coolant and lubricating oil used in the processing of the machine tool body are mixed and collected and then sent to the filter box 4 to filter the debris;

[0028] like Figure 1 , Figure 2 As shown, in order to introduce the filtered mixed liquid in the filter box 4 into the sedimentation box 3 and to lead out the separated coolant in the sedimentation box 3, a water inlet pipe 11 is fixedly connected to the upper wall of the filter box 4, and the filter box 4 and the sedimentation box 3 are connected through a water injection pipe 12. A drainage pipe 9 is fixedly connected to the front wall of the sedimentation box 3 and close to the lower wall. The outer wall of the drainage pipe 9 and the outer wall of the water injection pipe 12 are fixedly connected with a solenoid valve 10 for controlling the on-off. The on-off of the water injection pipe 12 and the drainage pipe 9 is controlled by the controller through the solenoid valve 10;

[0029] like Figure 2As shown, in order to conveniently control the liquid level height inside the sedimentation tank 3, a liquid level detection structure for detecting the liquid level height is arranged on the inner rear wall of the sedimentation tank 3 and near the right wall. The liquid level detection structure is a liquid level sensor 16. The liquid level sensor 16 is fixedly connected to the inner rear wall of the sedimentation tank 3 through a bracket 15. The bracket 15 is fixedly connected to the inner rear wall of the sedimentation tank 3 and the horizontal height is higher than the first rotating shaft 5. The liquid level sensor 16 uses a common reflective sensor on the market, which does not contact the mixed liquid, greatly improving its detection accuracy. The water injection amount of the water injection pipe 12 can be controlled by the liquid level sensor 16, and the liquid level is controlled to contact the lower wall of the oil suction belt 14. The closing time of the drain pipe 9 during drainage can also be controlled by the liquid level sensor 16. Specifically, the lowest liquid level during drainage is controlled not to be lower than the height of the drain pipe 9, so that the lubricating oil located on the upper layer of the liquid surface will not be discharged from the drain pipe 9, thereby improving the concentration of the coolant after separation.

[0030] like Figure 1 , Figure 2 As shown, in order to achieve the purpose of sucking away the lubricating oil on the upper layer of the liquid surface inside the sedimentation box 3, the inner wall of the sedimentation box 3 is rotatably connected with the first rotating shaft 5, the second rotating shaft 6 and the third rotating shaft 7, the first rotating shaft 5 and the second rotating shaft 6 are horizontally arranged, and the third rotating shaft 7 is located at the upper left of the first rotating shaft 5; the outer walls of the first rotating shaft 5, the second rotating shaft 6 and the third rotating shaft 7 are fixedly connected with the transmission roller 13, and the outer walls of the three groups of transmission rollers 13 are jointly sleeved with the oil absorption belt 14, the driving motor 8 is arranged on the front wall of the sedimentation box 3, and the third rotating shaft 7 is driven to rotate by the driving motor 8. When the height of the liquid surface inside the sedimentation box 3 is controlled to be flush with the lower wall of the oil absorption belt 14, the driving motor 8 drives the third rotating shaft 7 to rotate, and then drives the oil absorption belt 14 to rotate. The oil absorption belt 14 rotates counterclockwise in the front view direction, so that the lubricating oil in contact with it is taken away through the oil absorption belt 14;

[0031] like Figure 2 , Figure 3As shown, in order to facilitate the position adjustment of the oil scraper 21, the oil storage tank 1 and the sedimentation tank 3 are jointly provided with a square hole 2 that is through to the left and right on the opposite side. The inner left wall of the sedimentation tank 3 is connected to an oil receiving guide plate 20 through an adjustable structure. The adjustable structure includes two groups of supports 18 and telescopic frames 19. The two groups of supports 18 are distributed up and down and are fixedly connected to the inner left wall of the sedimentation tank 3 in sequence and are both located above the square hole 2. The two groups of telescopic frames 19 are respectively slidably connected to the ends of the two groups of supports 18 away from the inner left wall of the sedimentation tank 3. The oil receiving guide plate 20 is rotatably connected to the two groups of telescopic frames 19. 9 is on the side away from the support 18, the oil receiving guide plate 20 and the telescopic frame 19 as well as the telescopic frame 19 and the support 18 are locked by screws, and the position of the oil receiving guide plate 20 can be adjusted by the two sets of telescopic frames 19, and then the position of the oil scraper 21 can be adjusted, and the upper end of the oil scraper 21 is adjusted to be in close contact with the lower wall of the oil suction belt 14, so that the lubricating oil on the surface of the oil suction belt 14 can be scraped off, and the end of the oil receiving guide plate 20 away from the oil suction belt 14 passes through the square hole 2 and extends into the inside of the oil storage tank 1, and the scraped lubricating oil flows into the oil storage tank 1 along the oil receiving guide plate 20;

[0032] like Figure 2 , Figure 3 As shown, in order to scrape off the lubricating oil on the surface of the oil absorption belt 14, an oil receiving guide plate 20 is provided with an oil scraping structure at one end facing the oil absorption belt 14, and a limiting structure is provided on the inner wall of the sedimentation box 3 and below the third rotating shaft 7 for keeping the oil absorption belt 14 and the oil scraping structure tightly pressed against each other when the oil scraping structure is in operation. The oil scraping structure is an oil scraping knife 21, which is fixedly connected to the upper end of the oil receiving guide plate 20, and one end of the oil scraping knife 21 away from the oil receiving guide plate 20 is in contact with the outer wall of the oil absorption belt 14, and the limiting structure is a limiting roller 17, which is rotatably connected to the inner wall of the sedimentation box 3 and below the third rotating shaft 7, and the outer wall of the limiting roller 17 is rollingly connected to the inner wall of the oil absorption belt 14, and the limiting roller 17 ensures that the part of the oil absorption belt 14 in contact with the oil scraping knife 21 will not give way when the oil scraping knife 21 is in operation, thereby improving the oil scraping effect.

[0033] Working principle: The coolant and lubricating oil used in the processing of the machine tool body are mixed and collected and then sent to the filter box 4 to filter out debris. The controller controls the on-off of the water injection pipe 12 and the drain pipe 9 through the solenoid valve 10. The liquid level sensor 16 uses a common reflective sensor on the market, which does not contact the mixed liquid, greatly improving its detection accuracy. The water injection amount of the water injection pipe 12 can be controlled by the liquid level sensor 16, and the contact between the liquid surface and the lower wall of the oil suction belt 14 can be controlled. The closing time of the drain pipe 9 during drainage can also be controlled by the liquid level sensor 16. Specifically, the minimum liquid level during drainage is controlled not to be lower than the height of the drain pipe 9, so that the lubricating oil on the upper layer of the liquid surface will not be discharged from the drain pipe 9, thereby increasing the concentration of the coolant after separation. The third shaft 7 is driven to rotate by the drive motor 8. When the liquid level inside the sedimentation box 3 When the height is controlled to be flush with the lower wall of the oil suction belt 14, the driving motor 8 drives the third rotating shaft 7 to rotate, and then drives the oil suction belt 14 to rotate. The oil suction belt 14 rotates counterclockwise in the front view direction, so that the lubricating oil in contact with it is taken away through the oil suction belt 14. The position of the oil receiving guide plate 20 can be adjusted by two sets of telescopic frames 19, and then the position of the oil scraper 21 can be adjusted to adjust the upper end of the oil scraper 21 to be tightly against the lower wall of the oil suction belt 14, so that the lubricating oil on the surface of the oil suction belt 14 can be scraped off. The end of the oil receiving guide plate 20 away from the oil suction belt 14 passes through the square hole 2 and extends into the oil storage tank 1. The scraped lubricating oil flows into the oil storage tank 1 along the oil receiving guide plate 20. The limiting roller 17 ensures that the part of the oil suction belt 14 that contacts the oil scraper 21 will not give way when the oil scraper 21 is working, thereby improving the oil scraping effect.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision micro-cutting CNC machine tool, characterized in that: The machine tool comprises a machine tool body, a drive motor (8), a controller, an oil storage tank (1), a sedimentation tank (3) and a filter tank (4); the sedimentation tank (3) is fixedly connected to the right side of the oil storage tank (1) and is located on the lower wall of the filter tank (4); a liquid level detection structure for detecting the liquid level is arranged on the inner rear wall of the sedimentation tank (3) and close to the right wall; the inner wall of the sedimentation tank (3) is rotatably connected to a first rotating shaft (5), a second rotating shaft (6) and a third rotating shaft (7); the outer walls of the first rotating shaft (5), the second rotating shaft (6) and the third rotating shaft (7) are all fixedly connected to transmission rollers (13); the outer walls of the three groups of transmission rollers (13) are connected in a total of An oil suction belt (14) is provided in the same sleeve, the driving motor (8) is arranged on the front wall of the sedimentation box (3), the third rotating shaft (7) is driven to rotate by the driving motor (8), the oil storage tank (1) and the sedimentation box (3) are provided with a square hole (2) which is through-through from left to right on the opposite side, the inner left wall of the sedimentation box (3) is connected with an oil receiving guide plate (20) through an adjustable structure, the oil receiving guide plate (20) is provided with an oil scraping structure at one end facing the oil suction belt (14), and a limiting structure is provided on the inner wall of the sedimentation box (3) and below the third rotating shaft (7) for keeping the oil suction belt (14) and the oil scraping structure pressed against each other when the oil scraping structure is in operation.

2. A high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The upper wall of the filter box (4) is fixedly connected to a water inlet pipe (11); the filter box (4) and the sedimentation box (3) are connected via a water injection pipe (12); a drainage pipe (9) is fixedly connected to the front wall of the sedimentation box (3) near the lower wall; and the outer walls of the drainage pipe (9) and the outer walls of the water injection pipe (12) are fixedly connected to a solenoid valve (10) for controlling on and off.

3. A high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The adjustable structure comprises two groups of supports (18) and telescopic frames (19). The two groups of supports (18) are arranged vertically and are fixedly connected to the inner left wall of the sedimentation box (3) in sequence and are both located above the square hole (2). The two groups of telescopic frames (19) are respectively slidably connected to one end of the two groups of supports (18) away from the inner left wall of the sedimentation box (3). The oil receiving guide plate (20) is rotatably connected to one side of the two groups of telescopic frames (19) away from the supports (18). The oil receiving guide plate (20) and the telescopic frame (19) as well as the telescopic frame (19) and the support (18) are both locked by screws.

4. A high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The liquid level detection structure is a liquid level sensor (16), and the liquid level sensor (16) is fixedly connected to the inner rear wall of the sedimentation tank (3) via a bracket (15). The bracket (15) is fixedly connected to the inner rear wall of the sedimentation tank (3) and has a horizontal height higher than the first rotating shaft (5).

5. The high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The oil scraping structure is an oil scraping knife (21), the oil scraping knife (21) is fixedly connected to the upper end of the oil receiving guide plate (20), and one end of the oil scraping knife (21) away from the oil receiving guide plate (20) abuts against the outer wall of the oil suction belt (14).

6. A high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The limiting structure is a limiting roller (17), the limiting roller (17) is rotatably connected to the inner wall of the sedimentation box (3) and is located below the third rotating shaft (7), and the outer wall of the limiting roller (17) is rollingly connected to the inner wall of the oil absorption belt (14).

7. A high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: The first rotating shaft (5) and the second rotating shaft (6) are arranged horizontally, and the third rotating shaft (7) is located at the upper left of the first rotating shaft (5).

8. The high-precision micro-cutting CNC machine tool according to claim 1, characterized in that: One end of the oil receiving guide plate (20) away from the oil suction belt (14) passes through the square hole (2) and extends into the interior of the oil storage tank (1).

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