Numerical control machine tool for transformer pipe machining

Abstract

The present application belongs to the technical field of machine tool, and relates to a numerical control machine tool for transformer pipe machining. The present application comprises a machine tool main body, a connecting pipe, a base and a drill bit. A rotating ring is rotatably installed on the connecting pipe, a plurality of first fixing columns are fixed below the rotating ring, a plurality of second fixing columns are fixed at the bottom end of the connecting pipe, and an elastic filter screen is connected between adjacent first and second fixing columns. The elastic filter screen has two states: when the fixing columns are away from each other, it is in an arc shape for filtering cutting fluid; and when the fixing columns are close to each other, it is extruded into a circle for wrapping and closing the intercepted impurities. A rotating disc is rotatably installed in the base. The present application alternately switches the forms of the two groups of filter screens, automatically completes filter screen cleaning during the drilling process without stopping, significantly improves the machining efficiency, and ensures continuous and effective filtering of the cutting fluid.

Description

Technical Field

[0001] This invention belongs to the field of machine tool technology and relates to a CNC machine tool for processing transformer tubes. Background Technology

[0002] In the CNC drilling process of transformer components (such as inlet and outlet bushings, connecting pipes, etc.), cutting fluid is usually required to cool, lubricate, and remove chips from the drill bit. Since transformer components are mostly made of copper, aluminum alloys, or steel, drilling generates a large number of fine chips and metal particles. If these impurities mix with the cutting fluid and cannot be effectively filtered, it will lead to nozzle clogging, accelerated tool wear, and a decline in the quality of the machined surface.

[0003] Existing CNC machine tools generally use filters or filter cartridges in the cutting fluid circuit for interception and filtration. However, conventional filters become clogged with debris after a short period of use, causing a sharp drop in cutting fluid flow. To restore filtration capacity, operators must stop the machine and manually disassemble, clean, or replace the filter. This operation not only interrupts the machining process and reduces production efficiency but also increases labor costs, making it particularly unsuitable for batch continuous production scenarios.

[0004] A patent with publication number CN116551456A discloses a self-cleaning water-cooled electric spindle, which includes a base, a rotary spindle, a connecting rod, and a self-cleaning component. This self-cleaning component comprises a main cylinder, an end cap, and a movable cleaning part. The main cylinder has an air inlet, a liquid inlet, and an isolation plate with a one-way valve. The end cap has a filter screen and a waste outlet. The movable cleaning part includes a spiral vane and an impeller. During machining, cutting fluid enters through the liquid inlet, is filtered through the filter screen, and is sprayed onto the cutting tool. After machining stops, high-pressure gas enters through the air inlet, driving the impeller and spiral vane to rotate, cleaning residual iron filings on the filter screen and discharging them through the waste outlet. This solution achieves automatic cleaning of the filter screen to a certain extent without requiring manual replacement of the connecting pipes. However, the self-cleaning action can only occur when machining stops and gas purging is switched on. It cannot simultaneously clean the filter screen online during drilling, so the filter screen will gradually become clogged during machining, affecting the cooling effect.

[0005] To address the above problems, this invention proposes a CNC machine tool for processing transformer tube fittings. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a CNC machine tool for processing transformer tube fittings.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A CNC machine tool for processing transformer pipe fittings, comprising a connecting pipe for introducing cutting fluid and a base communicating with the connecting pipe, and further comprising: The swivel ring is rotatably connected to the connecting pipe and is equipped with a power mechanism to drive its rotation. Multiple first fixing posts are fixed below the rotating ring; Multiple second fixing posts are fixed to the bottom end of the connecting pipe and are arranged at intervals from the first fixing posts; The filter screen has two ends connected between adjacent first and second fixed posts respectively. The filter screen has two states: when the first and second fixed posts are far apart, the filter screen is in an open arc shape, used to filter the cutting fluid; when the first and second fixed posts are close to each other, the filter screen is squeezed into a round shape, used to wrap and seal the impurities collected on its surface. A turntable is rotatably mounted inside a base, and an opening is provided at the bottom of the turntable; The linkage mechanism is located between the rotating ring and the turntable. When the rotating ring rotates to the predetermined position, the linkage mechanism drives the turntable to rotate, so that the opening of the turntable is aligned with the bottom of the filter screen which is in a circular compression state. The chip removal pipe is connected to the opening on the turntable and is used to remove impurities that have been backflushed.

[0008] Furthermore, the power mechanism includes a second motor fixed to the outer wall of the connecting pipe, a gear fixed on the output shaft of the second motor, and a rack meshing with the gear fixed on the rotating ring.

[0009] Furthermore, the linkage mechanism includes a second magnet fixed on the turntable and a first magnet fixed on the rotating ring. When the rotating ring rotates to a predetermined position, the first magnet and the second magnet attract each other, causing the turntable to rotate.

[0010] Furthermore, it also includes a fixed plate, which is fixed inside the base, and the turntable is rotatably connected to the fixed plate. The fixed plate is provided with a first limiting rod and a second limiting rod to limit the rotation angle of the turntable.

[0011] Furthermore, a torsion spring is provided between the turntable and the fixed plate to reset the turntable after the rotating ring rotates in the opposite direction.

[0012] Furthermore, the turntable is equipped with a baffle for controlling the opening and closing of the opening; a first motor is fixedly installed on the turntable, and the output shaft of the first motor is fixedly connected to the baffle.

[0013] Furthermore, a control valve is provided on the chip removal pipe.

[0014] Furthermore, a rotary spindle is rotatably connected to the lower part of the base, and a connecting rod is fixedly connected to the rotary spindle. A drill bit is detachably connected to the lower end of the connecting rod, and a water outlet hole communicating with the inner cavity of the base is provided at the bottom of the connecting rod.

[0015] Furthermore, a second linear guide rail is installed on the machine tool body, a first linear guide rail is slidably arranged on the second linear guide rail, a connecting block is slidably arranged on the first linear guide rail, and the base is fixedly installed on the lower end of the connecting block.

[0016] Compared with existing technologies, this invention has the following advantages: When the drive ring rotates, the first fixed column moves relative to the second fixed column, causing the filter screen to switch between an arc shape and a circular shape. This allows the two sets of filter screens to alternately perform the filtration task. When one set of filter screens needs cleaning due to intercepted impurities, it simply switches to a circular shape, while the other set switches to an arc shape to continue filtration. Simultaneously, the cutting fluid backflushs the circular filter screen, flushing the trapped impurities into the chip removal pipe, achieving automatic cleaning. The cleaning of clogged filter screens can be completed while drilling is ongoing, avoiding the need to stop the machine to disassemble and clean the filter screens, thus improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the protective door when it is opened in this invention; Figure 3 This is a schematic diagram of the connecting block in this invention; Figure 4 This is a cross-sectional view of the base in this invention; Figure 5 This is a schematic diagram of the power mechanism in this invention; Figure 6 This is a schematic diagram of the state of the filter screen in this invention; Figure 7 This is a schematic diagram of the turntable structure in this invention; Figure 8 This is a schematic diagram of the structure of the fixed disk in this invention; Figure 9 This is a schematic diagram of the fit between the rotating ring and the connecting pipe in this invention; Figure 10 This is a schematic diagram of the baffle structure in this invention.

[0018] In the diagram: 1. Machine tool body; 2. Protective door; 3. Three-jaw chuck; 4. First linear guide rail; 5. Second linear guide rail; 6. Connecting block; 7. Base; 8. Connecting rod; 9. Drill bit; 10. Chip removal pipe; 11. Connecting pipe; 12. Turntable; 13. Fixed plate; 14. Water outlet; 15. Rotary spindle; 16. Bearing; 17. First filter screen; 18. First motor; 19. Second motor; 20. Gear; 21. Rack; 22. Rotary ring; 23. First magnet; 24. Second magnet; 25. First limit rod; 26. Second limit rod; 27. Second filter screen; 28. First fixed column; 29. ​​Second fixed column; 30. Baffle. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-10 As shown, the technical solution adopted by the present invention is as follows: A CNC machine tool for processing transformer pipe fittings includes a machine tool body 1, a rotating ring 22, a first fixed column 28, a second fixed column 29, and a chip removal pipe 10. A protective door 2 is slidably connected to the machine tool body 1. A three-jaw chuck 3 for fixing the pipe fittings is provided inside the machine tool body 1. A second linear guide rail 5 is fixedly installed on the machine tool body 1, and a first linear guide rail 4 is fixedly connected to the slider of the second linear guide rail 5. The first linear guide rail 4 is perpendicular to the second linear guide rail 5. A connecting block 6 is fixedly connected to the slider of the first linear guide rail 4. A base 7 is fixedly installed at the lower end of the connecting block 6.

[0021] A connecting pipe 11 is installed on the connecting block 6. The connecting pipe 11 extends into the base 7 and is used to introduce high-pressure cutting fluid or high-pressure gas. A rotary spindle 15 is rotatably connected to the lower end of the base 7, and the rotary spindle 15 and the base 7 are rotatably connected via a bearing 16. A connecting rod 8 is fixedly connected to the lower end of the rotary spindle 15, and a drill bit 9 is detachably connected to the lower end of the connecting rod 8. The axis of the drill bit 9 is perpendicular to the axis of the three-jaw chuck 3 and is used to drill holes on the side of the pipe.

[0022] A water outlet 14 is provided at the bottom of the connecting rod 8, which communicates with the inner cavity of the base 7 to spray cutting fluid onto the drill bit 9. Both the rotary spindle 15 and the connecting rod 8 have through holes to connect the inner cavity of the base 7 and the water outlet 14.

[0023] The rotating ring 22 is rotatably connected to the lower part of the connecting pipe 11. A rotating cavity is provided on the lower side wall of the connecting pipe 11, and the rotating ring 22 is disposed in the rotating cavity.

[0024] The rotating ring 22 is driven to rotate by a power mechanism. For example... Figure 5 , Figure 9 As shown, the power mechanism includes a second motor 19 fixed to the outer wall of the connecting pipe 11. A gear 20 is fixed on the output shaft of the second motor 19, and a rack 21 that meshes with the gear 20 is fixed on the rotating ring 22. A clearance groove is provided on the connecting pipe 11 to cooperate with the rack 21, and the rack 21 is slidably disposed in the clearance groove. When the second motor 19 is started, the rotating ring 22 can be driven to rotate forward or backward through the transmission of the gear 20 and the rack 21.

[0025] Multiple first fixing posts 28 are fixedly connected to the lower part of the rotating ring 22, and multiple second fixing posts 29 are fixedly connected to the bottom end of the connecting pipe 11. The second fixing posts 29 are arranged at intervals from the first fixing posts 28. A filter screen is connected between adjacent first fixing posts 28 and second fixing posts 29. The filter screen is a filter screen material with a certain degree of elasticity, such as stainless steel woven mesh or elastic polymer filter screen, which can deform under external force.

[0026] The filter has two working states: Arc-shaped (filtration state): When the first fixed post 28 and the second fixed post 29 at both ends of the filter screen move away from each other, the filter screen is stretched into an arc shape. At this time, the cutting fluid can pass through the filter screen, and impurities are intercepted on the outer surface of the filter screen to achieve the filtration function.

[0027] Circular (compressed and sealed state): When the first fixed post 28 and the second fixed post 29 at both ends of the filter screen come into contact with each other, the filter screen is compressed into a circular shape, which encloses the impurities collected on the surface of the filter screen inside the circular structure. At this time, the filter screen no longer undertakes the filtering task, which facilitates subsequent backwashing and chip removal.

[0028] Rotating ring 22 is rotatably connected to turntable 12. For example... Figure 7 As shown, the turntable 12 includes an upper circular plate and a lower circular plate. The upper and lower circular plates are fixedly connected by a connecting plate, and there is a certain gap between the upper and lower circular plates.

[0029] The lower end of the rotating ring 22 is rotatably connected to the upper circular plate. The upper circular plate has an adapter hole that communicates with the lower end of the connecting pipe 11. The filter screen is located between the upper and lower circular plates. Figure 6 As shown, multiple arc-shaped filter screens and a lower circular plate form a filter chamber. The cutting fluid in the connecting pipe 11 enters the filter chamber, and after filtration, flows into the inner cavity of the base 7.

[0030] The bottom of the turntable 12, i.e. the lower circular plate, has multiple openings. These openings are evenly distributed around the circumference and are connected to a circular filter screen to discharge impurities that have been removed from the circular filter screen.

[0031] A baffle 30 is installed inside the turntable 12 for rotation. For example... Figure 10 As shown, the baffle 30 has a communicating hole that mates with the opening. The opening is controlled to open and close by the baffle 30. The baffle 30 is driven by a first motor 18 fixed inside the turntable 12, and the output shaft of the first motor 18 is fixedly connected to the baffle 30.

[0032] A linkage mechanism is provided between the rotating ring 22 and the turntable 12. When the rotating ring 22 rotates to the predetermined position, that is, when the first fixed post 28 contacts the corresponding second fixed post 29, the linkage mechanism drives the turntable 12 to rotate, so that the opening of the turntable 12 is aligned with the bottom of the circular filter screen.

[0033] The linkage mechanism includes a first magnet 23 and a second magnet 24. The second magnet 24 is fixed on the turntable 12, and the first magnet 23 is fixedly connected to the rotating ring 22. When the rotating ring 22 rotates to a predetermined position, the first magnet 23 and the second magnet 24 attract each other, causing the turntable 12 to overcome the rotation of a certain angle, so that the opening at the bottom of the turntable 12 is aligned with the current circular filter screen below.

[0034] A fixed plate 13 is fixed inside the base 7, and a turntable 12 is rotatably connected to the fixed plate 13. A torsion spring is provided between the turntable 12 and the fixed plate 13.

[0035] like Figure 8 As shown, the fixed plate 13 has multiple oblong holes. Each oblong hole corresponds to a corresponding opening. A first limiting rod 25 and a second limiting rod 26 are also fixed to the fixed plate 13 to limit the rotation angle of the turntable 12. The connecting plate is positioned between the first limiting rod 25 and the second limiting rod 26, ensuring that the opening is always connected to the corresponding oblong hole when not blocked by the baffle 30.

[0036] The chip removal pipe 10 is mounted on the base 7, and the lower end of the oblong hole on the fixed plate 13 is connected to the chip removal pipe 10. Impurities flushed down by the filter screen, which is in a circular compression state, fall into the chip removal pipe 10 through the opening on the turntable 12 and the oblong hole. The chip removal pipe 10 is equipped with a control valve for intermittently opening the chip removal.

[0037] Working principle: such as Figure 6 As shown, for ease of description, the multiple filters are defined as first filter 17 and second filter 27. First filter 17 and second filter 27 are spaced apart. In this embodiment, four first filter 17 and four second filter 27 are provided. Initially, the first fixing post 28 is in contact with the clockwise adjacent second fixing post 29, and the first filter 17 is circular. The second filter 27 is arc-shaped, with the corresponding first fixing post 28 and second fixing post 29 moving away from each other. Multiple second filter 27s, first fixing posts 28 and second fixing posts 29, and the lower circular plate form a filter cavity. The opening on the turntable 12 is in communication with the oblong hole.

[0038] The pipe to be drilled is installed inside the machine tool body 1 using a three-jaw chuck 3. The protective door 2 is closed. The first linear guide rail 4 and the second linear guide rail 5 drive the base 7 and the drill bit 9 to move to a predetermined position on the side of the pipe.

[0039] The drill bit 9 is started to rotate, and high-pressure cutting fluid is introduced through the connecting pipe 11. The cutting fluid enters the filter chamber through the connecting pipe 11, and after being filtered by the second filter screen 27, it enters the inner cavity of the base 7. Then, it is sprayed onto the contact area between the drill bit 9 and the pipe through the perforations on the rotating spindle 15, the connecting rod 8, and the water outlet 14 at the bottom, achieving cooling and lubrication. The drill bit 9 drills holes in the side of the pipe during the feeding process.

[0040] Simultaneously, the cutting fluid inside the base 7 enters the circular first filter screen 17, backflushing and cleaning it. The cutting fluid entering the first filter screen 17 then enters the chip removal pipe 10 through the opening and the oblong hole. During this process, the control valve of the chip removal pipe 10 opens intermittently, so the cutting fluid inside the base 7 will not be discharged in large quantities from the chip removal pipe 10.

[0041] After a period of use, a certain amount of debris and impurities will accumulate on the surface of the second filter screen 27, affecting the normal flow of coolant. When cleaning the second filter screen 27 is necessary: First, start the first motor 18 to drive the baffle 30 to rotate at a certain angle, so that the baffle 30 blocks the opening on the turntable 12 to prevent iron filings from getting into the base 7.

[0042] Then, the second motor 19 is started, driving gear 20 to rotate. Gear 20, through rack 21, drives rotating ring 22 to rotate. Figure 6 As shown, the rotating ring 22 rotates clockwise, causing multiple first fixed posts 28 to rotate, bringing the first fixed posts 28 closer to the clockwise adjacent second fixed posts 29. This causes the second filter screen 27 to be gradually compressed and elastically deformed, taking on a circular shape, and encapsulating impurities on the surface of the second filter screen 27 within this circular structure. Simultaneously, the first fixed posts 28 gradually move away from the counter-clockwise adjacent second fixed posts 29, causing the first filter screen 17 to unfold and take on an arc shape. This continues until the first fixed posts 28 contact the clockwise adjacent second fixed posts 29. At this point, the multiple first filter screens 17, the first fixed posts 28 and the second fixed posts 29, and the lower circular plate form a filter chamber.

[0043] After the rotating ring 22 rotates to a certain angle, the first magnet 23 and the second magnet 24 attract each other. The second magnet 24 drives the turntable 12 to rotate to a certain angle against the torsion spring force, so that the opening at the bottom of the turntable 12 rotates to the position below the second filter screen 27.

[0044] Subsequently, the first motor 18 is started, driving the baffle 30 to rotate and open the opening. At this time, the cleaned first filter screen 17 can filter the cutting fluid normally, while the chip discharge pipe 10 is opened intermittently, so that the cutting fluid in the base 7 intermittently backflushes the second filter screen 27, and the iron filings wrapped by the second filter screen 27 are flushed into the chip discharge pipe 10 through the opening of the turntable 12 and discharged.

[0045] After processing, high-pressure gas is connected through the connecting pipe 11. The high-pressure gas cleans the residual cutting fluid inside the base 7, keeping the inside of the base 7 clean.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A CNC machine tool for machining transformer pipe fittings, comprising a connecting pipe (11) for introducing cutting fluid and a base (7) communicating with the connecting pipe (11), characterized in that, Also includes: The swivel ring (22) is rotatably connected to the connecting pipe (11) and is equipped with a power mechanism to drive its rotation; Multiple first fixing posts (28) are fixed below the rotating ring (22); Multiple second fixing posts (29) are fixed to the bottom end of the connecting pipe (11) and are arranged at intervals from the first fixing post (28); The filter screen has two ends connected between adjacent first fixed posts (28) and second fixed posts (29); the filter screen has two states: when the first fixed posts (28) and second fixed posts (29) are far apart, the filter screen is in an open arc shape, used to filter the cutting fluid; when the first fixed posts (28) and second fixed posts (29) are close to each other, the filter screen is squeezed into a round shape, used to wrap and seal the impurities collected on its surface; The turntable (12) is rotatably installed in the base (7), and an opening is provided at the bottom of the turntable (12); The linkage mechanism is located between the rotating ring (22) and the turntable (12). When the rotating ring (22) rotates to the predetermined position, the linkage mechanism drives the turntable (12) to rotate, so that the opening of the turntable (12) is aligned with the bottom of the filter screen in the circular extrusion state. The chip removal pipe (10) is connected to the opening on the turntable (12) and is used to remove impurities from the backflushing.

2. The CNC machine tool for processing transformer pipe fittings according to claim 1, characterized in that: The power mechanism includes a second motor (19) fixed to the outer wall of the connecting pipe (11), a gear (20) fixed on the output shaft of the second motor (19), and a rack (21) meshing with the gear (20) fixed on the rotating ring (22).

3. The CNC machine tool for processing transformer pipe fittings according to claim 1, characterized in that: The linkage mechanism includes a second magnet (24) fixed on the turntable (12) and a first magnet (23) fixed on the rotating ring (22). When the rotating ring (22) rotates to the predetermined position, the first magnet (23) and the second magnet (24) attract each other, driving the turntable (12) to rotate.

4. A CNC machine tool for processing transformer pipe fittings according to claim 1, characterized in that: It also includes a fixed plate (13), which is fixed inside the base (7). The turntable (12) is rotatably connected to the fixed plate (13). The fixed plate (13) is provided with a first limiting rod (25) and a second limiting rod (26) to limit the rotation angle of the turntable (12).

5. A CNC machine tool for processing transformer tube fittings according to claim 4, characterized in that: A torsion spring is provided between the turntable (12) and the fixed plate (13) to reset the turntable (12) after the rotating ring (22) rotates in the opposite direction.

6. A CNC machine tool for processing transformer tube fittings according to claim 1, characterized in that: The turntable (12) is equipped with a baffle (30) for controlling the opening and closing of the opening; the turntable (12) is fixedly mounted with a first motor (18), and the output shaft of the first motor (18) is fixedly connected to the baffle (30).

7. A CNC machine tool for processing transformer tube fittings according to claim 1, characterized in that: The chip removal pipe (10) is equipped with a control valve.

8. A CNC machine tool for processing transformer pipe fittings according to claim 1, characterized in that: A rotary spindle (15) is rotatably connected below the base (7), and a connecting rod (8) is fixedly connected to the rotary spindle (15). A drill bit (9) is detachably connected to the lower end of the connecting rod (8), and a water outlet hole (14) communicating with the inner cavity of the base (7) is provided at the bottom of the connecting rod (8).

9. A CNC machine tool for processing transformer tube fittings according to claim 1, characterized in that: The machine tool body (1) is equipped with a second linear guide rail (5), a first linear guide rail (4) is slidably arranged on the second linear guide rail (5), a connecting block (6) is slidably arranged on the first linear guide rail (4), and the base (7) is fixedly installed at the lower end of the connecting block (6).

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