Self-lubricating high-precision numerical control grinding machine

Abstract

The invention discloses a self-lubricating high-precision numerical control grinding machine, and relates to the field of numerical control grinding machines. Comprising a supporting frame and a limiting moving mechanism arranged on the supporting frame, and further comprises a bearing frame, the limiting moving mechanism is used for limiting a machined pipe fitting and can move the bearing frame, and a concentric-square-shaped frame is installed on one side of the bearing frame; and the gas flowing mechanism comprises piston cylinders installed on the front side wall and the rear side wall of the concentric-square-shaped frame, the interior of each piston cylinder is slidably connected with a first piston plate, and the two first piston plates are fixedly connected through a synchronous rod. In the actual using process of the grinding machine, when the conical face of the end of a thick-wall steel pipe is ground before welding, the adjustable piston heat dissipation and dust removal system is used for being matched with operation of the grinding mechanism, the heat dissipation and dust removal speed can be adjusted according to heat and dust generated in grinding unit time during grinding, and on the basis that the heat dissipation and dust removal effect is guaranteed, the grinding efficiency is improved. The loss of the piston system is reduced.

Description

Technical Field

[0001] This invention relates to the field of CNC grinding machines, and more particularly to a self-lubricating high-precision CNC grinding machine. Background Technology

[0002] In pipeline engineering, the end face of steel pipe is ground into a conical shape to fit with the joint and form a tight mechanical connection. Grinding is a key step, and its quality directly affects the reliability of the subsequent connection. Traditional CNC grinding machines are equipped with specialized dust-reducing and cooling mechanisms when grinding the conical ends of thick-walled steel pipes. These mechanisms remove dust and cool the pipe and the grinding area during grinding, improving service life and facilitating operation. For example, CN108857693A uses a piston system with a synchronous drive motor to dissipate heat and remove dust from the steel pipe and grinding head during grinding. However, in this technology, the piston stroke remains fixed during conical end-face grinding. In practice, the heat and dust generated per unit time gradually increase as grinding continues. The fixed piston stroke cannot be adjusted in real-time to accommodate these dynamic changes. To ensure optimal heat dissipation and dust removal, the piston stroke needs to remain at a large range per unit time. This results in significant wear and tear on the piston system over prolonged use, leading to a relatively short overall service life. Therefore, finding a solution to this problem is crucial. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a self-lubricating high-precision CNC grinding machine. In actual use, this grinding machine utilizes an adjustable piston heat dissipation and dust removal system in conjunction with the operation of the grinding mechanism. During grinding, the heat dissipation and dust removal speed can be adjusted according to the heat and dust generated per unit time, ensuring effective heat dissipation and dust removal while reducing wear on the piston system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A self-lubricating high-precision CNC grinding machine includes a support frame and a limiting and moving mechanism mounted on the support frame. It further includes: a bearing frame, wherein the limiting and moving mechanism is used to limit the movement of the processed tubular parts and can move the bearing frame; a U-shaped frame is mounted on one side of the bearing frame; and a gas flow mechanism, wherein the gas flow mechanism includes piston cylinders mounted on the front and rear side walls of the U-shaped frame, each piston cylinder having a piston plate slidably connected inside; two piston plates are fixedly connected by a synchronizing rod; a rotating tube is rotatably connected to one side of the bearing frame; and a rotating disk is fixedly connected to the left end of the rotating tube. A connecting seat is provided at the eccentric part of the side wall of the moving plate. The connecting seat is rotatably connected to one of the piston plates through a traction rod. The opposite sides of the two piston cylinders are connected to the air intake channel and the exhaust channel. The driving mechanism is connected to the rotating tube through a power transmission component. The connecting seat can move linearly away from the central axis of the rotating plate as the driving mechanism runs, so as to adjust the driving stroke of the piston plate per unit time. A connecting cylinder is installed on the other side of the support frame. The other end of the air intake channel is connected to the connecting cylinder. A grinding mechanism is installed inside the connecting cylinder. The grinding mechanism cooperates with the driving mechanism.

[0005] Preferably, the limiting movement mechanism includes a horizontal moving assembly installed on the upper end of the support frame. The moving part of the horizontal moving assembly is equipped with a sliding plate. The sliding plate is fixedly connected to the bearing frame. The upper end of the support frame is fixedly connected to a mounting base. A limiting component is installed on the side of the mounting base near the grinding mechanism. A hollow oil injection strip is fixedly connected to the side of the sliding plate near the mounting base. The lower end of the hollow oil injection strip has several oil injection ports. One side of the hollow oil injection strip is connected to an oil injection pipe.

[0006] Preferably, a blocking cover is fixedly connected to the other side of the connecting cylinder. The blocking cover has a round opening with a gap on the outer wall of the processing tube. By drawing in gas through the round opening in conjunction with the air intake channel, airflow can be generated simultaneously on the outer and inner sides of the processing tube, thereby improving the uniformity of cooling of the processing part during grinding.

[0007] Preferably, the drive mechanism includes a drive motor mounted on one side of the support frame, a gear two fixedly connected to the output shaft of the drive motor, a drive shaft rotatably connected to one side of the support frame, a gear three meshing with the gear two mounted on the drive shaft, and synchronous pulleys mounted on both the drive shaft and the rotating tube, with the two synchronous pulleys connected by a synchronous belt drive.

[0008] Preferably, the air intake channel includes a filter box installed on the upper end of the support frame. The air intake end of the filter box is connected to the inside of the connecting cylinder through an air intake pipe. The opposite side spaces of the two piston cylinders are each connected to a connecting pipe one. The other end of the two connecting pipes one is connected to the exhaust end of the filter box through a connecting pipe two. The opposite side spaces of the two piston cylinders are each connected to a connecting pipe three. Each connecting pipe one and connecting pipe three is equipped with a one-way valve. The one-way valve inside the connecting pipe one allows the flow to enter the piston cylinder in one direction only, while the one-way valve inside the connecting pipe three allows the piston cylinder to discharge to the outside in one direction only.

[0009] Preferably, the grinding mechanism includes a rotating plate. The end of the drive shaft away from the synchronous wheel is fixedly connected to the rotating plate. Two sets of grinding components are provided on the side of the rotating plate away from the drive shaft. Each set of grinding components consists of multiple grinding parts. Each grinding part consists of a fixed plate and a grinding head. One set of grinding components is fixedly connected to the rotating plate. Multiple connecting slots are provided on the side of the rotating plate away from the drive shaft. A second spring is fixedly connected to the side of the rotating plate near the drive shaft. A retaining ring is fixedly connected to the other end of the second spring. Multiple guide rods are fixedly connected to the retaining ring on one side of the second spring. The other ends of the multiple guide rods extend into the corresponding connecting slots. The other ends of the multiple guide rods are fixedly connected to the corresponding grinding parts in the other set of grinding components.

[0010] Preferably, an adjusting cylinder one is fixedly connected to the side of the support frame near the limiting member. A slidable piston plate two is provided inside the adjusting cylinder one. One side of the piston plate two is elastically connected to the corresponding side wall of the adjusting cylinder one through a spring one. The other ends of the two connecting pipes three are connected to a connecting pipe four. The other end of the connecting pipe four is connected to the space on the side of the adjusting cylinder one near the support frame. The space on the side of the adjusting cylinder one near the support frame is connected to the outside through a release port. A normally open solenoid valve is installed inside the release port. The normally open solenoid valve opens and closes synchronously with the drive motor.

[0011] Preferably, a T-shaped groove is formed on the side wall of the rotating disk, and a columnar groove is formed at the bottom of the inner part of the T-shaped groove. A piston block is slidably connected in the columnar groove. A drive rod is fixedly connected to the upper end of the piston block. The upper end of the drive rod is fixedly connected to a connecting seat. The connecting seat is T-shaped and slidably connected to the T-shaped groove. An adjusting cylinder is fixedly connected to the side of the adjusting cylinder away from the support frame. A piston block is slidably connected inside the adjusting cylinder. The piston block and piston plate are fixedly connected by a fixing rod. A connecting pipe is connected to the space on the side of the adjusting cylinder away from the adjusting cylinder. The other end of the connecting pipe is connected to the end of the rotating pipe away from the rotating disk through a rotary joint. The side of the rotating pipe near the rotating disk is connected to the bottom space of the columnar groove through a connecting channel.

[0012] Preferably, a rectangular strip is fixedly connected to the inner wall of the connecting cylinder near the support frame, and a rectangular groove is opened on the side of the rectangular strip away from the support frame. A rotating rod is rotatably connected between the front and rear inner walls of the rectangular groove. Two sets of threaded layers are symmetrically opened on the rotating rod. Both sets of threaded layers are reciprocating threads. Each set of threaded layers is provided with a mating wedge block. Both wedge blocks are slidably connected to the rectangular groove, and the inclined surfaces of the two wedge blocks are arranged opposite each other.

[0013] Preferably, a connecting plate is fixedly connected to the front side of the support frame, a gearbox is installed on the front side of the connecting plate, the front end of the rotating rod extends to the outside, the front end of the rotating rod is fixedly connected to the output shaft of the gearbox, the input shaft of the gearbox is connected to a gear one through a one-way bearing, a connecting rod is fixedly connected to the side of the piston plate two away from the support frame, the other end of the connecting rod passes through the side wall of the adjusting cylinder one and is fixedly connected to a rack, the rack meshing with the gear one.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: 1. Through the coordinated structure of drive motor, gears and synchronous pulleys, the grinding components are precisely fed and the rotating tube rotates stably, ensuring that the grinding operation is accurate and efficient.

[0015] 2. The reciprocating motion of the piston plate generates unidirectional airflow, which effectively removes grinding dust. At the same time, it generates airflow on both the inside and outside of the processing pipe, improving the uniformity of cooling and cooling the grinding mechanism, thus ensuring the grinding environment and equipment performance.

[0016] 3. Based on the changes in the grinding contact area, the piston plate automatically adjusts its driving stroke per unit time, changing the airflow rate. While ensuring the cooling and dust removal effect, it reduces initial wear and effectively extends the service life of the equipment.

[0017] 4. The movement of the wedge block is driven by gears, transmissions and other structures, so that the grinding components can be used alternately. Combined with the air flow for heat dissipation, it avoids the temperature of a single component from getting too high after long-term use, thus extending the overall service life of the grinding components.

[0018] 5. The self-lubricating structure is set up so that when the horizontal moving group is started, the external oil injection pump injects oil evenly into the key parts of the equipment through the hollow oil injection bar, providing reliable lubrication, reducing equipment operation failures and improving operational stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a self-lubricating high-precision CNC grinding machine proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the rear structure; Figure 3 for Figure 2 Enlarged structural view of the support frame section; Figure 4 for Figure 1 Top view; Figure 5 for Figure 4 A schematic diagram of the AA-direction cross-section; Figure 6 for Figure 5 Enlarged view of point C; Figure 7 for Figure 4 Schematic diagram of the BB-direction cross section; Figure 8 for Figure 7 Enlarged view of point D; Figure 9 This is a diagram showing the fit between the grinding mechanism and the wedge block structure. Figure 10 for Figure 9 Front view; Figure 11 This is a diagram showing the state of the pipe fitting after grinding. Figure 12 This is a schematic diagram of the adjusting part of the connector; Figure 13 for Figure 12 A cross-sectional schematic diagram.

[0020] In the diagram: 1. Support frame, 2. Mounting base, 3. Limiting component, 4. Horizontal moving assembly, 5. Sliding plate, 6. Bearing frame, 7. Hollow oil injection strip, 8. Connecting cylinder, 9. Blocking cover, 10. Connecting pipe one, 11. U-shaped frame, 12. Piston cylinder, 13. Filter box, 14. Inlet pipe, 15. Connecting pipe two, 16. Adjusting cylinder one, 17. Adjusting cylinder two, 18. Connecting pipe three, 19. Connecting rod, 20. Rack, 21. Piston block two, 22. Gear one, 23. Gearbox, 24. Connecting plate, 25. Release port, 26. Piston plate one, 27. Traction rod, 28. Connecting pipe three 29 Connecting pipe four, 30 Drive motor, 31 Gear two, 32 Gear three, 33 Drive shaft, 34 Synchronous pulley, 35 Synchronous belt, 36 Piston plate two, 37 Spring one, 38 Fixed rod, 39 Rotating plate, 40 Rectangular bar, 41 Rotating rod, 42 Threaded layer, 43 Wedge block, 44 Abutting ring, 45 Drive rod, 46 Fixed plate, 47 Grinding head, 48 Piston block one, 49 Connecting groove, 50 Spring two, 51 Guide rod, 52 Rotating disk, 53 T-slot, 54 Connecting seat, 55 Rotating pipe, 56 Rotary joint. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] A self-lubricating high-precision CNC grinding machine, belonging to the intelligent manufacturing equipment industry, utilizes the rotation of the pipeline in conjunction with the inclined surface feed of the grinding head to achieve the conical surface machining of the pipeline end face, and adaptively adjusts the cooling and dust removal speed to ensure the machining effect.

[0023] Reference Figure 1-13 A self-lubricating high-precision CNC grinding machine includes a support frame 1 and a limiting movement mechanism disposed on the support frame 1; The system also includes a support frame 6, a limiting and moving mechanism for limiting the movement of the processed pipe fittings, and the ability to move the support frame 6. A loop frame 11 is installed on one side of the support frame 6. The limiting and moving mechanism includes a horizontal moving assembly 4 installed on the upper end of the support frame 1. The horizontal moving assembly 4 consists of a screw drive component and a guide rail part, which is prior art and will not be described in detail here. In this solution, the guide rail part consists of two guide rails. The moving part of the horizontal moving assembly 4 is equipped with a sliding plate 5, which is fixedly connected to the support frame 6. A mounting base 2 is fixedly connected to the upper end of the support frame 1. The mounting base 2 is installed on the side near the grinding mechanism. A limiting component 3 is installed. The limiting component 3 here is a three-jaw chuck, and the three-jaw chuck and the center of the mounting base 2 are both provided with through openings. A hollow oil injection strip 7 is fixedly connected to the side of the sliding plate 5 near the mounting base 2. Several oil injection ports are opened at the lower end of the hollow oil injection strip 7. An oil injection pipe is connected to one side of the hollow oil injection strip 7. The oil injection pipe is connected to an external oil injection pump. In this solution, there are three oil injection ports, which are respectively facing two guide rails and one lead screw. When self-lubrication is required, the horizontal moving group is started. At the same time, after the external oil injection pump is started, the lubricating oil can be evenly attached to the guide rails and the lead screw.

[0024] The system also includes a gas flow mechanism, which comprises piston cylinders 12 mounted on the front and rear side walls of the U-shaped frame 11. Each piston cylinder 12 has a piston plate 26 slidably connected inside it. Two piston plates 26 are fixedly connected by a synchronizing rod. A rotating tube 55 is rotatably connected to one side of the support frame 6. A rotating disk 52 is fixedly connected to the left end of the rotating tube 55. A connecting seat 54 is provided at the eccentric position of the side wall of the rotating disk 52. The connecting seat 54 is rotatably connected to one of the piston plates 26 by a traction rod 27. As the rotating disk 52 rotates, the rotation of the connecting seat 54 can drive the piston plate 26 to reciprocate back and forth. The spaces on opposite sides of the two piston cylinders 12 are connected to an air intake channel and an exhaust channel. The air intake channel includes a filter box mounted on the upper end of the support frame 6. 13. The filter box 13 adopts a combined filter structure of filter screen, filter element and activated carbon, which can achieve a good filtration effect. The air inlet end of the filter box 13 is connected to the inside of the connecting cylinder 8 through the air inlet pipe 14. The opposite side spaces of the two piston cylinders 12 are connected to the connecting pipe 10. The other end of the two connecting pipes 10 is connected to the exhaust end of the filter box 13 through the connecting pipe 25. The opposite side spaces of the two piston cylinders 12 are connected to the connecting pipe 38. The other end of the two connecting pipes 328 is connected to the connecting pipe 429. Each connecting pipe 10 and connecting pipe 328 is equipped with a one-way valve. The flow direction of the one-way valve inside the connecting pipe 10 is one-way to the outside to enter the piston cylinder 12. The flow direction of the one-way valve inside the connecting pipe 328 is one-way to the outside to discharge from the piston cylinder 12. It should be noted that by using multiple one-way valves, during the reciprocating motion of the two piston plates 26, one-way airflow can be generated inside the connecting cylinder 8, the air inlet pipe 14, the filter box 13, one of the piston cylinders 12, and the connecting pipe 29. Due to the arrangement of the two piston cylinders 12, continuous airflow can be generated at the air inlet pipe 14 and the connecting pipe 29. Furthermore, in this scheme, the specific connection between the air inlet pipe 14 and the connecting cylinder 8 is located at the bottom of the connecting cylinder 8. By adopting this method, even if some dust settles, it can be drawn away by the one-way airflow.

[0025] The system also includes a drive mechanism, which is connected to the rotating tube 55 via a power transmission component. The drive mechanism includes a drive motor 30 mounted on one side of the support frame 6. The output shaft of the drive motor 30 is fixedly connected to a second gear 31. A drive shaft 33 is rotatably connected to one side of the support frame 6. A third gear 32 that meshes with the second gear 31 is mounted on the drive shaft 33. Both the drive shaft 33 and the rotating tube 55 are equipped with synchronous pulleys 34. The two synchronous pulleys 34 are connected by a synchronous belt 35. With the drive of the drive motor 30, the drive shaft 33 can be rotated by the transmission of the second gear 31 and the third gear 32, which facilitates the subsequent grinding operation. In addition, the rotation of the rotating tube 55 can be achieved by using the synchronous pulleys 34 in conjunction with the synchronous belt 35.

[0026] The other side of the support frame 6 is equipped with a connecting cylinder 8, and the other side of the connecting cylinder 8 is fixedly connected with a blocking cover 9. The blocking cover 9 has a round opening with a gap on the outer wall of the processing tube. By drawing in gas through the round opening in conjunction with the air intake channel, airflow can be generated simultaneously on the outer and inner sides of the processing tube, improving the uniformity of cooling of the processed part during grinding. The other end of the air intake channel is connected to the connecting cylinder 8. Specifically, during the grinding operation, the central axis of the tube and the central axis of the round opening are collinear. At this time, an annular gap is formed between the outer wall of the tube and the round opening. Since the three-jaw chuck and the center of the mounting base 2 are both provided with through openings, the other end of the tube is connected to the outside. After the airflow inside the connecting cylinder 8 is drawn away, it will be replenished through the inside of the tube and the annular gap. Therefore, airflow will be generated on both the inner and outer sides of the tube.

[0027] The connecting cylinder 8 is equipped with a grinding mechanism that works in conjunction with the drive mechanism. The grinding mechanism includes a rotating plate 39. One end of the drive shaft 33, away from the synchronous wheel 34, is fixedly connected to the rotating plate 39. Two sets of grinding components are arranged on the side of the rotating plate 39 away from the drive shaft 33. Each set of grinding components consists of multiple grinding parts, each consisting of a fixed plate 46 and a grinding head 47. The grinding surface of the grinding head 47 is beveled, allowing the outer side of the tube to be ground into a conical shape during its movement and rotation. One set... The grinding assembly is fixedly connected to the rotating plate 39. The rotating plate 39 has multiple connecting slots 49 on the side away from the drive shaft 33. A second spring 50 is fixedly connected to the side of the rotating plate 39 close to the drive shaft 33. A stop ring 44 is fixedly connected to the other end of the second spring 50. A multiple guide rods 51 are fixedly connected to the side of the stop ring 44 of the second spring 50. The other ends of the multiple guide rods 51 extend into the corresponding connecting slots 49. The other ends of the multiple guide rods 51 are fixedly connected to the corresponding grinding part in another set of grinding assemblies. Furthermore, in the initial state, spring 2 50 is in an uncompressed state, so the set of grinding components connected to multiple guide rods 51 is submerged inside the connecting groove 49. When grinding is performed in this state, the grinding operation is actually performed by the set of grinding components fixedly connected to the rotating plate 39. In the next grinding operation, the set of grinding components connected to multiple guide rods 51 will move out of the connecting groove 49 and away from the rotating plate 39, and closer to the tube to be processed than the set of grinding components connected to multiple guide rods 51. In this state, the grinding operation is performed by this set of grinding components. Using this method, two grinding components can be used alternately. During continuous grinding, in conjunction with gas flow for heat dissipation, the temperature of the grinding components can be kept from getting too high during grinding, thus ensuring their service life.

[0028] Among them, the support frame 6 is fixedly connected to the side of the limit member 3 with the adjusting cylinder 16. The adjusting cylinder 16 is provided with a sliding piston plate 2 36. One side of the piston plate 2 36 is elastically connected to the corresponding side wall of the adjusting cylinder 16 through the spring 37. Furthermore, the spring 37 is a spring with a large stiffness coefficient. This method can ensure the stability of the piston system. The other end of the connecting pipe 4 29 is connected to the space of the side of the adjusting cylinder 16 near the support frame 6. The space of the side of the adjusting cylinder 16 near the support frame 6 is connected to the outside through the release port 25. The normally open solenoid valve is installed inside the release port 25. The normally open solenoid valve opens and closes synchronously with the drive motor 30. During the continuous gas supply process of connecting pipe 29, gas enters the space on the side of regulating cylinder 16 near the support frame 6, causing piston plate 36 to move and compress spring 37. Since spring 37 uses a spring with a large stiffness coefficient, a large force is required to move piston plate 36. In this state, the normally open solenoid valve is energized and sealed, so gas can be accumulated. After the drive motor 30 is turned off, the normally open solenoid valve is de-energized and opened, and the gas is released through release port 25, thus completing the reset of piston plate 36.

[0029] The rotating disk 52 has a T-shaped groove 53 on its side wall. A columnar groove is formed at the bottom of the T-shaped groove 53. A piston block 48 is slidably connected inside the columnar groove. A drive rod 45 is fixedly connected to the upper end of the piston block 48. The upper end of the drive rod 45 is fixedly connected to a connecting seat 54. The connecting seat 54 is T-shaped and slidably connected to the T-shaped groove 53. An adjusting cylinder 17 is fixedly connected to the side of the adjusting cylinder 16 away from the support frame 6. A piston block 21 is slidably connected inside the adjusting cylinder 21. The piston plate 26 is fixedly connected to the piston plate 26 by a fixing rod 38. The space on the side of the adjusting cylinder 27 away from the adjusting cylinder 16 is connected to a connecting pipe 18. The other end of the connecting pipe 18 is connected to the end of the rotating pipe 55 away from the rotating disk 52 through a rotary joint 56. The side of the rotating pipe 55 close to the rotating disk 52 is connected to the bottom space of the columnar groove through a connecting channel. The connecting seat 54 can make a linear movement away from the central axis of the rotating disk 52 as the driving mechanism runs, so as to realize the adjustment of the driving stroke of the piston plate 26 per unit time. Furthermore, the space of the second regulating cylinder 17 away from the first regulating cylinder 16, the connecting pipe 18, the rotating pipe 55, the connecting channel, and the bottom space of the columnar groove are all filled with oil. The oil can be used to realize the transmission of force. When the second piston plate 36 moves, it can drive the second piston block 21 to move through the fixed rod 38, and finally realize the movement of the first piston block 48, which drives the connecting seat 54 to move away from the center of the rotating disk 52.

[0030] A rectangular strip 40 is fixedly connected to the inner wall of the connecting cylinder 8 near the support frame 6. A rectangular groove is formed on the side of the rectangular strip 40 away from the support frame 6. A rotating rod 41 is rotatably connected between the front and rear inner walls of the rectangular groove. Two sets of threaded layers 42 are symmetrically formed on the rotating rod 41. Both sets of threaded layers 42 are reciprocating threads. Each set of threaded layers 42 is provided with a mating wedge block 43. Both wedge blocks 43 are slidably connected to the rectangular groove. The inclined surfaces of the two wedge blocks 43 are arranged opposite each other. A connecting plate 24 is fixedly connected to the front side of the support frame 6. A gearbox 23 is installed on the front side of the connecting plate 24. The gearbox 23 is an accelerator that can rotate the input shaft. The speed is amplified and output through the output shaft. The front end of the rotating rod 41 extends to the outside. The front end of the rotating rod 41 is fixedly connected to the output shaft of the transmission 23. The input shaft of the transmission 23 is connected to the gear 22 through a one-way bearing. The piston plate 36 is fixedly connected to the side away from the support frame 6 with a connecting rod 19. The other end of the connecting rod 19 passes through the side wall of the adjusting cylinder 16 and is fixedly connected to a rack 20. The rack 20 meshes with the gear 22. With the one-way bearing, when the rack 20 moves away from the pipe to be processed, the gear 22 can drive the rotating rod 41 to rotate. When it moves closer to the pipe to be processed, it will not drive the rotating rod 41 to rotate. It should be noted that this solution is for grinding fixed-model pipe fittings (for other pipe fittings, only the dimensions of the piston system and related parts need to be adjusted). The start-up time of the drive motor 30 is the same, so the final distance of movement and reset of the rack 20 is constant. Using this method, in conjunction with the gearbox 23 and other structures, the number of rotations of the rotating rod 41 after each start-up and shutdown of the drive motor 30 is fixed. This number of rotations allows the threaded layer 42 to drive the corresponding wedge block 43 from the front to the rear (threaded area), or from the rear to the front. Specifically, each time the drive motor 30 starts... Each movement causes the two wedge blocks 43 to move relative to each other or away from each other. With the inclined surface structure on the wedge blocks 43 and the use of the second spring 50, when the two wedge blocks 43 move relative to each other, they can press against the moving ring 44 and move closer to the rotating plate 39. When the two wedge blocks 43 move away from each other, the moving ring 44 will move back to the initial position under the elastic action of the second spring 50. The grinding component can be adjusted by using the guide rod 51 so that each grinding operation will use a different grinding component for the next grinding operation. Multiple balls can be set on the side of the wedge block 43 near the moving ring 44 to reduce the relative rotational friction between the wedge block 43 and the moving ring 44 during grinding.

[0031] The working principle of this invention is as follows: Place the processed pipe on a self-lubricating high-precision CNC grinding machine. Use the three-jaw chuck limiter 3 on the mounting base 2 to limit and fix one end of the processed pipe. First, start the horizontal moving group 4 so that the grinding part of the grinding component contacts the processed pipe. The drive motor 30, installed on one side of the support frame 6, is started, and the horizontal moving group 4 is started again to feed the grinding section. The output shaft of the drive motor 30 drives the second gear 31 to rotate. The second gear 31 meshes with the third gear 32 on the drive shaft 33, causing the drive shaft 33 to rotate. Both the drive shaft 33 and the rotating tube 55 are equipped with synchronous pulleys 34. The two synchronous pulleys 34 are connected by a synchronous belt 35, thereby realizing the rotation of the rotating tube 55. The end of the drive shaft 33 away from the synchronous wheel 34 is fixedly connected to the rotating plate 39. The rotation of the rotating plate 39 will drive one of the grinding mechanisms to rotate and perform grinding operations. In the initial state, the grinding components fixed on the rotating plate 39 are used to achieve grinding. The rotation of the rotating tube 55 drives the rotating disk 52 to rotate. The connecting seat 54 at the eccentric side wall of the rotating disk 52 drives the piston plate 26 to reciprocate back and forth inside the piston cylinder 12 via the traction rod 27. Due to the setting of multiple one-way valves, during the reciprocating motion of the two piston plates 26, a one-way airflow is generated inside the connecting cylinder 8, the air inlet pipe 14, the filter box 13, one of the piston cylinders 12, and the connecting tube 29. Due to the setting of the two piston cylinders 12, a continuous airflow is generated at the air inlet pipe 14 and the connecting tube 29. This continuous airflow can remove the grinding dust, and the connection between the air inlet pipe 14 and the connecting cylinder 8 is located at the bottom of the connecting cylinder 8, so even if some dust settles, it can be removed by the one-way airflow. In addition, during the grinding operation, the airflow inside the connecting cylinder 8 is drawn away and replenished through the inside of the tube and the annular gap, so that the outer and inner sides of the processing tube are generated simultaneously with the airflow, improving the uniformity of cooling of the processing part during grinding. At the same time, this airflow can also cool the grinding mechanism. During the continuous air supply (exhaust) process of connecting pipe 29, the normally open solenoid valve is energized and sealed, gas accumulates, and the gas enters the space near the support frame 6 of regulating cylinder 16, causing piston plate 36 to move and compress spring 37. When piston plate 36 moves, it drives piston block 21 to move inside regulating cylinder 17 via fixing rod 38. Since the space of regulating cylinder 17 away from regulating cylinder 16, connecting pipe 18, rotating pipe 55, connecting channel, and bottom space of columnar groove are all filled with oil, the oil transmission ultimately drives piston block 48 to move, causing connecting seat 54 to move away from the center of rotating disk 52, realizing the adjustment of piston plate 26's driving stroke per unit time. The use of this structure can realize the adjustment of piston plate 26's driving stroke as grinding progresses. Figure 11During the process, since the feed speed and the rotation speed of the grinding section remain constant, the contact area during grinding increases, and the contact friction increases, resulting in more dust and heat being generated. At this time, because the driving stroke of the piston plate 26 per unit time increases, the airflow velocity increases, and the cooling and dust removal effect increases. While ensuring the cooling and dust removal effect, compared with the existing technology, the initial driving stroke of the piston plate 26 per unit time is smaller and then increases, which effectively reduces the actual wear and improves its service life. After the subsequent drive motor 30 is turned off, the normally open solenoid valve is de-energized and turned on, the gas in the regulating cylinder 16 is released through the release port 25, the piston plate 36 is reset under the action of the spring 37, and at the same time, it drives the related components to reset, preparing for the next grinding operation. It is worth mentioning that the movement of piston plate 26 also drives the rack 20 on connecting rod 19 to move. The rack 20 meshes with gear 22 connected by a one-way bearing. With the one-way bearing, when the rack 20 moves away from the pipe to be processed (i.e., when gas is released from the release port 25 and the above structure is reset), it drives gear 22 to rotate. Gear 22 drives the rotating rod 41 to rotate through the gearbox 23 (accelerator). The two sets of reciprocating thread layers 42 on the rotating rod 41 drive the corresponding wedge blocks 43 to move. Each time the drive motor 30 is started, the rotating rod 41 rotates a fixed number of times, causing the two wedge blocks 43 to move relative to each other or in opposite directions. When the two wedge blocks 43 move relative to each other, they press against the abutting ring 44 and move closer to the rotating plate 39. Through the guide rod 51, a set of grinding components connected to multiple guide rods 51 moves out of the connecting groove 49 and away from the rotating plate 39, getting closer to the tube to be processed than the other set of grinding components. The next grinding operation will be performed by this set of grinding components. When the two wedge blocks 43 move in opposite directions, under the elastic action of the second spring 50, the abutting ring 44 moves back to the initial position, realizing the alternating use of the grinding components. With the help of gas flow for heat dissipation, the temperature of the grinding components will not be too high during continuous grinding, thus extending the service life. When self-lubrication is required, the horizontal moving group 4 is started, and the external oil pump is started at the same time. The oil enters the hollow oil injection bar 7 through the oil injection pipe. The oil is evenly attached to the two guide rails and a lead screw from the three oil injection ports at the lower end of the hollow oil injection bar 7, providing lubrication guarantee for the operation of the equipment.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-lubricating high-precision CNC grinding machine, comprising a support frame (1) and a limiting and moving mechanism disposed on the support frame (1), characterized in that, Also includes: The support frame (6) is used to limit the movement of the processed pipe fittings and can move the support frame (6). A loop frame (11) is installed on one side of the support frame (6). The gas flow mechanism includes piston cylinders (12) installed on the front and rear side walls of the spiral frame (11). Each piston cylinder (12) is slidably connected with a piston plate (26). The two piston plates (26) are fixedly connected by a synchronizing rod. A rotating tube (55) is rotatably connected to one side of the support frame (6). A rotating disk (52) is fixedly connected to the left end of the rotating tube (55). A connecting seat (54) is provided at the eccentric side of the rotating disk (52). The connecting seat (54) is rotatably connected to one of the piston plates (26) by a traction rod (27). The spaces on opposite sides of the two piston cylinders (12) are connected to an inlet flow channel and an exhaust flow channel. The drive mechanism is connected to the rotating tube (55) through a power transmission component. The connecting seat (54) can move linearly away from the central axis of the rotating disk (52) as the drive mechanism runs, thereby adjusting the driving stroke of the piston plate (26) per unit time. A connecting cylinder (8) is installed on the other side of the support frame (6). The other end of the air intake channel is connected to the connecting cylinder (8). A grinding mechanism is installed inside the connecting cylinder (8). The grinding mechanism cooperates with the drive mechanism.

2. The self-lubricating high-precision CNC grinding machine according to claim 1, characterized in that, The limiting movement mechanism includes a horizontal moving group (4) installed on the upper end of the support frame (1). The moving part of the horizontal moving group (4) is equipped with a sliding plate (5). The sliding plate (5) is fixedly connected to the bearing frame (6). The upper end of the support frame (1) is fixedly connected to a mounting seat (2). A limiting component (3) is installed on the side of the mounting seat (2) near the grinding mechanism. A hollow oil injection strip (7) is fixedly connected on the side of the sliding plate (5) near the mounting seat (2). Several oil injection ports are opened at the lower end of the hollow oil injection strip (7). An oil injection pipe is connected to one side of the hollow oil injection strip (7).

3. The self-lubricating high-precision CNC grinding machine according to claim 1, characterized in that, A blocking cover (9) is fixedly connected to the other side of the connecting cylinder (8). The blocking cover (9) has a round opening with a gap on the outer wall of the processing tube. By drawing in gas through the round opening in conjunction with the air intake channel, airflow can be generated simultaneously on the outer and inner sides of the processing tube, thereby improving the uniformity of cooling of the processing part during grinding.

4. The self-lubricating high-precision CNC grinding machine according to claim 1, characterized in that, The drive mechanism includes a drive motor (30) installed on one side of the support frame (6). The output shaft of the drive motor (30) is fixedly connected to a gear two (31). A drive shaft (33) is rotatably connected to one side of the support frame (6). A gear three (32) that meshes with the gear two (31) is installed on the drive shaft (33). Synchronous pulleys (34) are installed on both the drive shaft (33) and the rotating tube (55). The two synchronous pulleys (34) are connected by a synchronous belt (35).

5. A self-lubricating high-precision CNC grinding machine according to claim 4, characterized in that, The air intake channel includes a filter box (13) installed on the upper end of the support frame (6). The air intake end of the filter box (13) is connected to the inside of the connecting cylinder (8) through the air intake pipe (14). The opposite side spaces of the two piston cylinders (12) are connected to the first connecting pipe (10). The other end of the two first connecting pipes (10) is connected to the exhaust end of the filter box (13) through the second connecting pipe (15). The opposite side spaces of the two piston cylinders (12) are connected to the third connecting pipe (28). Each first connecting pipe (10) and the third connecting pipe (28) are equipped with a one-way valve. The flow direction of the one-way valve inside the first connecting pipe (10) is one-way to the outside and into the inside of the piston cylinder (12). The flow direction of the one-way valve inside the third connecting pipe (28) is one-way to the outside and out of the piston cylinder (12).

6. A self-lubricating high-precision CNC grinding machine according to claim 1, characterized in that, The polishing mechanism includes a rotating plate (39). The end of the drive shaft (33) away from the synchronous wheel (34) is fixedly connected to the rotating plate (39). Two sets of polishing components are provided on the side of the rotating plate (39) away from the drive shaft (33). Each set of polishing components consists of multiple polishing parts. Each polishing part consists of a fixed plate (46) and a polishing head (47). One set of polishing components is fixedly connected to the rotating plate (39). Multiple connecting slots (49) are provided on the side of the rotating plate (39) away from the drive shaft (33). A second spring (50) is fixedly connected on the side of the rotating plate (39) close to the drive shaft (33). A stop ring (44) is fixedly connected to the other end of the second spring (50). Multiple guide rods (51) are fixedly connected to the side of the stop ring (44) on the second spring (50). The other ends of the multiple guide rods (51) extend into the corresponding connecting slots (49). The other ends of the multiple guide rods (51) are fixedly connected to the corresponding polishing parts in the other set of polishing components.

7. A self-lubricating high-precision CNC grinding machine according to claim 5, characterized in that, The support frame (6) is fixedly connected to the side of the limit member (3) with an adjusting cylinder (16). The adjusting cylinder (16) is provided with a sliding piston plate (36). One side of the piston plate (36) is elastically connected to the corresponding side wall of the adjusting cylinder (16) through a spring (37). The other ends of the two connecting pipes (28) are connected to a connecting pipe (29). The other end of the connecting pipe (29) is connected to the space of the side of the adjusting cylinder (16) near the support frame (6). The space of the side of the adjusting cylinder (16) near the support frame (6) is connected to the outside through a release port (25). A normally open solenoid valve is installed inside the release port (25). The normally open solenoid valve is opened and closed synchronously with the drive motor (30).

8. A self-lubricating high-precision CNC grinding machine according to claim 7, characterized in that, The rotating disk (52) has a T-shaped groove (53) on its side wall. A columnar groove is formed at the bottom of the T-shaped groove (53). A piston block (48) is slidably connected in the columnar groove. A drive rod (45) is fixedly connected to the upper end of the piston block (48). The upper end of the drive rod (45) is fixedly connected to the connecting seat (54). The connecting seat (54) is T-shaped and slidably connected to the T-shaped groove (53). An adjusting cylinder (17) is fixedly connected to the side of the adjusting cylinder (16) away from the support frame (6). Piston block 2 (21) is slidably connected inside cylinder 2 (17). Piston block 2 (21) and piston plate 2 (36) are fixedly connected by fixing rod (38). A connecting pipe (18) is connected to the space on the side of adjusting cylinder 2 (17) away from adjusting cylinder 1 (16). The other end of the connecting pipe (18) is connected to the end of rotating pipe (55) away from rotating disk (52) through a rotary joint (56). The side of rotating pipe (55) close to rotating disk (52) is connected to the bottom space of columnar groove through a connecting channel.

9. A self-lubricating high-precision CNC grinding machine according to claim 8, characterized in that, A rectangular strip (40) is fixedly connected to the inner wall of the connecting cylinder (8) near the support frame (6). A rectangular groove is opened on the side of the rectangular strip (40) away from the support frame (6). A rotating rod (41) is rotatably connected between the front and rear inner walls of the rectangular groove. Two sets of threaded layers (42) are symmetrically opened on the rotating rod (41). Both sets of threaded layers (42) are reciprocating threads. Both sets of threaded layers (42) are provided with matching wedge blocks (43). Both wedge blocks (43) are slidably connected to the rectangular groove. The inclined surfaces of the two wedge blocks (43) are arranged opposite each other.

10. A self-lubricating high-precision CNC grinding machine according to claim 9, characterized in that, A connecting plate (24) is fixedly connected to the front side of the support frame (6). A gearbox (23) is installed on the front side of the connecting plate (24). The front end of the rotating rod (41) extends to the outside. The front end of the rotating rod (41) is fixedly connected to the output shaft of the gearbox (23). The input shaft of the gearbox (23) is connected to a gear (22) through a one-way bearing. A connecting rod (19) is fixedly connected to the side of the piston plate (36) away from the support frame (6). The other end of the connecting rod (19) passes through the side wall of the adjusting cylinder (16) and is fixedly connected to a rack (20). The rack (20) meshes with the gear (22).

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