A flange drilling device for a smoke damper of a machine tool

Abstract

This invention belongs to the field of flange processing technology, and particularly relates to a drilling device for flue gas damper flanges mounted on a machine tool. The device includes: a limiting spraying mechanism, comprising a mounting plate detachably connected to the outside of a multi-axis drilling machine head; the four corners of the bottom end of the mounting plate are connected to a hollow pressure plate via suction components; the pressure plate has several through holes corresponding to the positions of the multi-axis drilling machine drill bits; and each suction component has a reset component on its outer peripheral wall; and a positioning mechanism, comprising a self-centering component located in the center of the top surface of the processing table and a pressing component located at the bottom end of the pressure plate, corresponding to and adapted to the self-centering component. This application synchronizes the positioning, clamping, and spraying functions with the machine head, automatically completing the centering and clamping of the flange workpiece, achieving a closed-loop supply of cutting fluid, simplifying the clamping process, improving the consistency of hole machining, reducing cutting fluid consumption, and increasing drilling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of flange processing technology, and particularly relates to a drilling and processing device for flue gas damper flanges assembled on a machine tool. Background Technology

[0002] The flue gas damper connection flange is a key component used for the docking and assembly of damper components in flue gas ventilation and flue gas treatment systems. Several sets of assembly through holes for bolt fastening need to be machined on the flange end face. The positional accuracy of the holes and the machining quality of the end face directly affect the overall assembly coaxiality and sealing performance of the damper.

[0003] Currently, drilling for this type of flange is generally performed using ordinary drilling machines or machining centers with simple tooling. In actual production, workpiece clamping often relies on manual alignment and locking, which is cumbersome. The alignment quality is greatly affected by the operator's experience, and the flange workpiece center is prone to radial offset. During batch continuous processing, the consistency of hole position is difficult to guarantee, which is not conducive to the standardized assembly of subsequent damper components.

[0004] During drilling, cutting fluid is often supplied to the machining area via external spraying through external pipelines. During spraying, the cutting fluid tends to splash outwards, and the metal chips generated during machining mix with the cutting fluid and scatter on the workbench, making it difficult to collect and separate them for recycling. This not only results in the loss and waste of cutting fluid but also leads to poor cleanliness at the work site and a large amount of subsequent cleaning and maintenance work.

[0005] There is an urgent need for improvement, so we propose a drilling device for flue gas damper connecting flanges that is mounted on a machine tool. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a drilling device for a flue gas damper connecting flange mounted on a machine tool.

[0007] In view of this, the present invention provides a drilling device for a flue gas damper connecting flange assembled on a machine tool, comprising:

[0008] The limiting spraying mechanism includes a mounting plate detachably connected to the outside of the head of a multi-axis drilling machine. The four corners of the bottom end of the mounting plate are connected to a hollow pressure plate through suction components. The pressure plate has several through holes that correspond one-to-one with the position of the drill bit of the multi-axis drilling machine. Each suction component has a reset component on its outer peripheral wall.

[0009] The positioning mechanism includes a self-centering component located in the middle of the top surface of the processing table and a pressing component located at the bottom of the pressure plate, corresponding to and adapted to the position of the self-centering component. The pressing component first contacts and engages with the self-centering component as the head moves downward, thereby self-centering and limiting the connection flange.

[0010] The processing table has a liquid storage tank in its inner cavity, and a filter assembly is installed in the liquid storage tank. The top surface of the processing table has several clearance holes that correspond one-to-one with the positions of the drill bits of the multi-axis drilling machine and are connected to the inner cavity of the liquid storage tank. A liquid inlet assembly is provided between the liquid storage tank and the suction assembly.

[0011] Furthermore, it also includes a cleaning mechanism, which includes a through hole in the middle of the surface of the processing table and communicating with the inner cavity of the liquid storage tank, a rotating component connected to the side of the through hole near the liquid storage tank, and a number of cleaning brushes connected to the drive end of the rotating component and in contact with the surface of the filter component.

[0012] Furthermore, the filtration assembly includes a filter screen in the form of a funnel, which is disposed in the liquid storage tank. The bottom end of the filter screen is connected to a chip removal pipe. A sealing plate is fixedly connected to the lower outer peripheral wall of the chip removal pipe. The sealing plate is detachably connected to the bottom opening of the processing table.

[0013] Furthermore, the suction assembly includes pull rods connected to the four corners of the bottom end of the mounting plate, and sleeves connected to the four corners of the pressure plate surface and corresponding to the positions of the pull rods. Each sleeve has a piston slidably connected inside, and each pull rod is connected to the corresponding piston.

[0014] Furthermore, the liquid inlet assembly includes a liquid suction hole and a liquid outlet hole opened on both sides of the bottom end of the inner cavity of each sleeve. Each liquid suction hole and liquid outlet hole penetrates the pressure plate and is connected to its inner cavity. A conduit is connected between two liquid suction holes on the same side. Each conduit is connected to a flexible tube. The other end of each flexible tube penetrates the processing table and extends to the lower part of the inner cavity of the liquid storage tank. A first one-way valve and a second one-way valve are respectively installed in each liquid suction hole and each liquid outlet hole.

[0015] Furthermore, the reset assembly includes a reset spring sleeved on the outside of the same pull rod and sleeve, with both ends of the reset spring connected to the pressure plate and the mounting plate, respectively.

[0016] Furthermore, the self-centering component includes a connecting ring fixedly connected to the center of the processing table surface. The inner cavity of the connecting ring is provided with a plurality of pushing parts. The outer end of each pushing part is fixedly connected to a connecting block. Each connecting block slides through the connecting ring and is fixedly connected to a pressing part. The pressing component includes a pressing part fixedly connected to the center of the bottom end of the pressure plate.

[0017] Furthermore, the pushing part includes an arc-shaped plate, and a reducing plate is fixedly connected to the bottom end of each arc-shaped plate. The reducing plate is narrowed along the axial direction of the arc-shaped plate.

[0018] The pressing part includes a cylinder and a reduced-diameter column connected to the bottom of the cylinder. The reduced-diameter column is narrowed along the axial direction of the cylinder. The inner diameter of the cavity formed by the arc-shaped plates is adapted to the outer diameter of the cylinder, and the inner diameter of the cavity formed by the reduced-diameter plates is adapted to the outer diameter of the reduced-diameter column.

[0019] Furthermore, the rotating assembly includes a connecting cylinder fixedly connected to the side of the through hole near the inner cavity of the liquid storage tank, a drive column connected to the bottom end of the inner cavity of the connecting cylinder, and a pressing pipe fixedly connected to the bottom end of the reduced diameter column. The outer peripheral wall of the drive column is provided with a spiral groove, and a U-shaped connecting frame is slidably sleeved on the outer side of the drive column. Guide blocks are connected to opposite ends of the inner side of the connecting frame, and each guide block is slidably connected in the corresponding spiral groove. A drive shaft is fixedly connected to the bottom end of the drive column. The drive shaft rotates through the connecting cylinder and is fixedly connected to a drive disk. Each of the cleaning brushes is fixedly connected to the outer peripheral wall of the drive disk at equal intervals.

[0020] The inner cavity of the connecting cylinder has symmetrically opened limit grooves on both sides, and the outer sides of the connecting frame are fixedly connected to limit blocks, with each limit block slidably connected in the corresponding limit groove.

[0021] Furthermore, each of the through holes has a sealing tube fixedly connected to its inner wall, and each of the sealing tubes has several liquid guiding holes equidistantly spaced along the circumference.

[0022] The beneficial effects of this invention are:

[0023] The integrated setup of positioning mechanism and limiting liquid spraying mechanism, which are synchronously linked with the head, enables integrated drilling of flue gas damper connecting flanges, including self-centering positioning, end face clamping, and closed-loop supply of cutting fluid. The progressive downward trajectory of the pressing component first contacts the centering and then the pressure plate follows the clamping, which automatically aligns the workpiece center and constrains the cutting fluid spray range, thereby improving clamping efficiency, preventing cutting fluid splashing and scattering, avoiding hole position deviation caused by manual alignment deviation, and improving the positional quality and cleanliness of batch flange drilling.

[0024] Furthermore, by using a pull rod sleeve in conjunction with a piston suction structure and a return spring elastic return design, the linear power of the machine tool can be converted into cutting fluid suction and pressure power during conventional drilling feed. This achieves synchronous cutting fluid supply and retraction without the need for an additional fluid pump. The adaptive elastic force of the return spring compensates for the clamping stroke in real time, maintaining a stable end face clamping force throughout the entire process without the need for manual stroke adjustment, thus improving the integration of the device and the continuous stability of workpiece clamping.

[0025] It can also adopt a spiral groove-guided linear and rotary conversion integrated cleaning structure to maintain directional rotary cleaning output during the drilling reciprocating feed process. It can automatically remove the chips accumulated on the filter screen surface without additional drive components, prevent the cutting fluid circulation from being interrupted due to filter channel blockage, and ensure the solid-liquid separation effect and the continuous smooth circulation loop. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0027] Figure 2 This is a schematic diagram of the multi-axis drilling machine and the limiting liquid spraying mechanism of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0028] Figure 3 This is a schematic diagram of the processing table and positioning mechanism of a flue gas damper connecting flange drilling processing device assembled on a machine tool, as proposed in this invention.

[0029] Figure 4 This is a schematic diagram of the limiting liquid spraying mechanism of a flue gas damper connecting flange drilling processing device assembled on a machine tool, as proposed in this invention.

[0030] Figure 5 This is a schematic diagram of the internal structure of the limiting liquid spraying mechanism of a flue gas damper connecting flange drilling processing device assembled on a machine tool, as proposed in this invention.

[0031] Figure 6 This is the invention Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 This is an overall internal front view of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0033] Figure 8 This is the internal front view of the multi-axis drilling machine and the limiting liquid spraying mechanism of the flue gas damper connecting flange drilling processing device assembled on the machine tool according to the present invention.

[0034] Figure 9 This is a schematic diagram of the filter screen and cleaning mechanism of a flue gas damper connecting flange drilling processing device assembled on a machine tool, as proposed in this invention.

[0035] Figure 10 This is the present invention. Figure 8 Enlarged view at point B in the middle;

[0036] Figure 11 This is a schematic diagram of the internal structure of the machining table of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0037] Figure 12 This is a schematic diagram of the positioning mechanism of a drilling device for connecting flanges of a flue gas damper, which is assembled on a machine tool according to the present invention.

[0038] Figure 13 This is a schematic diagram of the rotating component and cleaning brush structure of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0039] Figure 14 This is a front view of the internal rotating component of a flue gas damper connecting flange drilling device assembled on a machine tool, as proposed in this invention.

[0040] Figure 15 This is a schematic diagram of the drive column and connecting frame structure of a flue gas damper connecting flange drilling processing device assembled on a machine tool, as proposed in this invention.

[0041] The markings in the diagram are as follows:

[0042] 1. Multi-axis drilling machine; 2. Mounting plate; 3. Tie rod; 4. Sleeve; 5. Return spring; 6. Pressure plate; 7. Through hole; 8. Hose; 9. Machining table; 10. Sealing tube; 11. Pressing section; 110. Cylindrical column; 111. Reducing diameter column; 12. Pressing tube; 13. Piston; 14. Guide tube; 15. Fluid guide hole; 16. Self-centering assembly; 160. Connecting ring; 161. Pushing section; 162. Arc plate; 163. Reducing diameter plate; 164. Connecting block; 165. Extrusion section; 166. Arc-shaped section; 17. Through hole; 18. Chip removal pipe; 19. Sealing plate; 20. Liquid storage tank; 21. Filter screen; 22. Cleaning brush; 23. Rotating assembly; 230. Connecting cylinder; 231. Connecting frame; 232. Limiting groove; 233. Drive column; 234. Spiral groove; 235. Guide block; 236. Drive shaft; 237. Limiting block; 24. Drive disc; 25. Liquid suction hole; 26. Liquid outlet hole; 27. First check valve; 28. Clearance hole; 29. ​​Second check valve. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0048] Reference Figures 1 to 15 A drilling device for flue gas damper connecting flanges, assembled on a machine tool, comprising:

[0049] The limiting spraying mechanism includes a mounting plate 2 detachably connected to the outside of the head of the multi-axis drilling machine 1. The four corners of the bottom end of the mounting plate 2 are connected to a hollow pressure plate 6 through a suction assembly. The pressure plate 6 has a plurality of through holes 7 corresponding one-to-one with the position of the drill bit of the multi-axis drilling machine 1. Each suction assembly has a reset assembly on its outer peripheral wall.

[0050] The positioning mechanism includes a self-centering component 16 located in the middle of the top surface of the processing table 9 and a pressing component located at the bottom of the pressure plate 6, which corresponds to and is adapted to the position of the self-centering component 16. The pressing component first contacts and engages with the self-centering component 16 as the head moves downward, thereby self-centering and limiting the connection flange.

[0051] The processing table 9 has a liquid storage tank 20 in its inner cavity. The liquid storage tank 20 is equipped with a filter assembly. The top surface of the processing table 9 has several clearance holes 28 that correspond one-to-one with the positions of the drill bits of the multi-axis drilling machine 1 and communicate with the inner cavity of the liquid storage tank 20. A liquid inlet assembly is provided between the liquid storage tank 20 and the suction assembly.

[0052] This application integrates positioning, clamping, and fluid spraying functions into a structure that synchronizes the movement of the drilling head. During the downward feed of the multi-axis drilling machine 1, the pressing structure first engages with the self-centering structure. The vertical feed force drives the centering structure to move radially synchronously, automatically aligning and limiting the center of the flange workpiece without manual alignment. As the drilling head continues to feed, the end face of the pressure plate 6 adheres to the surface of the flange workpiece, clamping and fixing it. Subsequently, the drill bit passes through the corresponding hole on the pressure plate 6 to contact the workpiece and perform drilling. Throughout the entire downward feed process, the suction assembly contracts as the drilling head descends, delivering the cutting fluid from inside the suction assembly to the inner cavity of the pressure plate 6 through the fluid inlet assembly. The fluid is ejected through the through hole 7 and acts directly on the drill bit and the drilling area, providing continuous cooling and lubrication for the drilling operation. When the drill head resets upward, the reset component drives the suction component to move in the opposite direction. The internal volume of the suction component expands to form a negative pressure, drawing the cutting fluid in the reservoir 20 into the suction component through the inlet component. This serves as a reserve medium for the cutting fluid spray in the next machining operation, thus forming a continuous and stable cutting fluid circulation supply path. The full-process linkage operation can effectively simplify the clamping operation steps, improve the positional consistency of hole machining, constrain the spray range of the cutting fluid, reduce splashing and scattering, reduce material consumption, improve the working environment, shorten the auxiliary time for workpiece clamping and turning, and improve the overall machining efficiency.

[0053] It should be noted that the internal dimensions of the clearance hole 28 and the inner diameter of the through hole 7 are both larger than the outer diameter of the drill bit, providing clearance space for the drill bit's feed and retraction. A sealing gasket can be installed at the bottom of the pressure plate 6. This increases the contact friction between the pressure plate 6 and the connecting flange end face, improving the positioning stability after the workpiece is clamped. It also forms a sealing barrier between the pressure plate 6 and the workpiece's contact surface, preventing cutting fluid leakage from the contact gap. During drilling, the cutting fluid can be temporarily stored in the through hole 7. After drilling of the connecting flange is completed, the cutting fluid flows back to the storage tank 20 through the through hole 7 and the clearance hole 28, achieving centralized recovery and recycling of the cutting fluid.

[0054] The multi-axis drilling machine 1 involved in this application is a mature existing technology. Its specific structure, driving method and working principle are well known to those skilled in the art, so it will not be described in detail in this specification.

[0055] In the example of this application, a cleaning mechanism is also included, which includes a through hole 17 opened in the middle of the surface of the processing table 9 and communicating with the inner cavity of the liquid storage tank 20, a rotating component 23 connected to the through hole 17 near the side of the liquid storage tank 20, and a plurality of cleaning brushes 22 connected to the drive end of the rotating component 23 and in contact with the surface of the filter component.

[0056] As a preferred example of the present invention, a through hole 17 communicating with the liquid storage tank 20 is provided in the middle of the machining table 9, and a rotating component 23 and a cleaning brush 22 attached to the surface of the filter component are arranged at the through hole 17. During the workpiece machining and the reciprocating feed of the machine head, the rotating component 23 can be driven to rotate by the driving force of the machining action, thereby driving the cleaning brush 22 to rotate and clean along the surface of the filter component, so as to sweep away the chips accumulated on the filter surface in time from the filter area. This cleaning action is carried out synchronously with the drilling process. There is no need to set up an additional independent driving element and control program. The filter channel can be continuously cleared during continuous machining, avoiding the flow blockage caused by the accumulation of metal chips on the filter surface, ensuring the flow capacity of the cutting fluid circulation loop, reducing the frequency of machine stoppage to clean the filter structure, extending the continuous operation time of the equipment, and maintaining a stable solid-liquid separation effect to ensure the cleanliness of the recovered cutting fluid.

[0057] In the example of this application, the filter assembly includes a filter screen 21 in the form of a funnel structure disposed in the liquid storage tank 20. The bottom end of the filter screen 21 is connected to a chip discharge pipe 18. A sealing plate 19 is fixedly connected to the lower outer peripheral wall of the chip discharge pipe 18. The sealing plate 19 is detachably connected to the bottom opening of the processing table 9 by bolts.

[0058] As a preferred example of the present invention, a funnel-shaped filter screen 21 is used as the filter body. After the cutting fluid carrying the chips falls into the storage tank 20, the chips are intercepted by the filter screen 21 at the top, and the clean cutting fluid passes through the filter screen 21 into the lower part of the storage tank 20. The funnel-shaped inclined wall surface allows the intercepted chips to automatically gather at the chip discharge pipe 18 at the bottom of the filter screen 21 under their own gravity and the flushing action of the cutting fluid, realizing the automatic collection and removal of chips. The sealing plate 19 configured at the bottom of the chip discharge pipe 18 is detachably connected to the bottom opening of the processing table 9, which can ensure the sealing of the bottom of the storage tank 20 during normal operation and prevent cutting fluid leakage.

[0059] In the example of this application, the suction assembly includes pull rods 3 connected to the four corners of the bottom end of the mounting plate 2, and sleeves 4 connected to the four corners of the surface of the pressure plate 6 and corresponding to the positions of the pull rods 3. Each sleeve 4 is slidably connected to a piston 13, and each pull rod 3 is connected to the corresponding piston 13.

[0060] As a preferred example of the present invention, the suction assembly adopts a piston 13 structure with a pull rod 3 and a sleeve 4 cooperating with a piston 13. The upper end of the pull rod 3 moves synchronously up and down with the head mounting plate 2, and the lower end extends into the inner cavity of the sleeve 4 and connects with the piston 13. As the head reciprocates, it drives the piston 13 to slide axially back and forth in the inner cavity of the sleeve 4, causing the sealed volume of the inner cavity of the sleeve 4 to undergo periodic expansion and contraction changes. This directly converts the linear feed power of the machine tool head into a power source for the suction and delivery of cutting fluid. When the machine head moves downward, the piston 13 moves synchronously towards the bottom of the sleeve 4 with the pull rod 3, and the inner cavity volume of the sleeve 4 gradually decreases to form positive pressure, thus drawing the cutting fluid out of the inner cavity. The cutting fluid is pressurized through the outlet channel to the inner cavity of the pressure plate 6, continuously supplying cutting fluid to the drilling station. When the machine head moves upward to reset, the piston 13 moves synchronously to the top of the sleeve 4 along with the pull rod 3 through the reset assembly. The inner cavity of the sleeve 4 gradually expands to form a negative pressure, and the cutting fluid is drawn from the storage tank 20 through the suction channel to complete the medium reserve for the next injection. This structure does not require an additional independent liquid pump and matching power unit. The overall structure has a high degree of integration and a compact layout. The suction and pressurization actions are completely triggered synchronously with the feed and reset stroke of the machine head, and the action response is without delay. The timing of the cutting fluid injection supply and the return replenishment are matched with the drilling processing rhythm.

[0061] In the example of this application, the liquid inlet assembly includes a liquid suction hole 25 and a liquid outlet hole 26 opened on both sides of the bottom end of the inner cavity of each sleeve 4. Each liquid suction hole 25 and liquid outlet hole 26 penetrates the pressure plate 6 and is connected to its inner cavity. A conduit 14 is connected between two liquid suction holes 25 on the same side. Each conduit 14 is connected to a hose 8. The other end of each hose 8 penetrates the processing table 9 and extends to the lower part of the inner cavity of the liquid storage tank 20. A first one-way valve 27 and a second one-way valve 29 are respectively installed in each liquid suction hole 25 and each liquid outlet hole 26.

[0062] As a preferred example of the present invention, by providing a suction hole 25 and a discharge hole 26 with one-way valves at the bottom end of the inner cavity of the sleeve 4, a one-way flow liquid circulation is formed in conjunction with the reciprocating motion of the piston 13: when the piston 13 moves upward, the second one-way valve 29 at the discharge hole 26 closes and the first one-way valve 27 at the suction hole 25 opens, and the negative pressure in the inner cavity of the sleeve 4 draws the cutting fluid in the reservoir 20 into the sleeve 4 through the hose 8 and the conduit 14; when the piston 13 moves downward, the first one-way valve 27 at the suction hole 25 closes. When the second one-way valve 29 at the closed outlet 26 is opened, the positive pressure inside the sleeve 4 forces the cutting fluid into the inner cavity of the pressure plate 6, and finally sprays it out from the through hole 7. The suction hole 25 on the same side is connected through the conduit 14 and extends to the lower part of the storage tank 20 with the help of the flexible hose 8. This can not only adapt to the position change during the lifting and lowering of the machine head and ensure the continuous connection of the fluid circuit, but also form a stable one-way circulation loop to realize the automatic extraction, spraying and return of cutting fluid, complete the closed-loop supply, and effectively reduce the ineffective loss and overflow of cutting fluid.

[0063] In the example of this application, the reset assembly includes a reset spring 5 sleeved on the outside of the same pull rod 3 and sleeve 4, and the two ends of the reset spring 5 are respectively connected to the pressure plate 6 and the mounting plate 2.

[0064] As a preferred example of the present invention, a return spring 5 is sleeved on the outside of the pull rod 3 and the sleeve 4. When the machine head feeds downward, the pressure plate 6 stops descending after contacting the workpiece. The machine head continues to drive the pull rod 3 to compress the return spring 5. At this time, the elastic force of the return spring 5 acts in the opposite direction on the pressure plate 6, providing a continuous and stable end face clamping force for the workpiece and preventing the workpiece from moving during drilling. When the machine head resets upward, the compressed return spring 5 gradually rebounds, pushing the sleeve 4 and the pressure plate 6 to maintain a close contact with the workpiece. At the same time, it drives the piston 13 to move upward relative to the sleeve 4 to complete the suction action. After the spring resets, the pressure plate 6 is raised synchronously with the machine head. This structure can achieve the dual functions of providing workpiece clamping force and automatic reset of the suction structure by relying on only a single elastic component. The structure is simple and reliable, and there is no need to set up additional reset drive and clamping force application components, which effectively simplifies the structural complexity of the overall device. Moreover, the action is completely synchronized with the machine head feed.

[0065] In the example of this application, the self-centering component 16 includes a connecting ring 160 fixedly connected to the middle of the surface of the processing table 9. The inner cavity of the connecting ring 160 is provided with a plurality of pushing parts 161. The outer end of each pushing part 161 is fixedly connected to a connecting block 164. Each connecting block 164 slides through the connecting ring 160 and is fixedly connected to a pressing part 165. The pressing component includes a pressing part 11 fixedly connected to the middle of the bottom end of the pressure plate 6.

[0066] As a preferred example of the present invention, the self-centering component 16 adopts a structure in which a circumferentially distributed pushing part 161, a connecting block 164, and a pressing part 165 cooperate with a central pressing part 11. When the pressure plate 6 moves downward with the head, the pressing part 11 at the bottom extends downward into the inner cavity of the connecting ring 160, applying a radial thrust to the circumferentially arranged pushing part 161. The pushing part 161 drives the outer pressing part 165 to move outward radially synchronously through the connecting block 164. After multiple sets of pressing parts 165 are simultaneously supported outward, they abut against the inner wall of the flange workpiece, achieving center alignment and positioning from inside the workpiece. This structure can automatically complete the radial centering of the workpiece by relying on the vertical feed power of the head, without the need for manual alignment and locking operations. It can automatically correct the center offset when the workpiece is placed, ensuring the coaxiality of the flange workpiece center and the drilling machining center.

[0067] Furthermore, the end of the extrusion part 165 away from the connecting block 164 is provided with an arc-shaped part 166. The extrusion part 165 is an elastic component made of polyurethane or oil-resistant rubber. When it comes into contact with the inner hole of the flange workpiece, it can produce a small amount of elastic deformation. While ensuring the stability of clamping and positioning, it avoids rigid contact that scratches the surface of the inner hole of the workpiece. It can also adapt to the small dimensional deviation of the inner hole of the workpiece and improve the positioning adaptability.

[0068] In the example of this application, the pushing part 161 includes an arc-shaped plate 162, and a reducing plate 163 is fixedly connected to the bottom end of each arc-shaped plate 162. The reducing plate 163 is narrowed along the axial direction of the arc-shaped plate 162.

[0069] The pressing part 11 includes a cylinder 110 and a reduced-diameter column 111 connected to the bottom end of the cylinder 110. The reduced-diameter column 111 is narrowed along the axial direction of the cylinder 110. The inner diameter of the cavity formed by the arc plates 162 is adapted to the outer diameter of the cylinder 110, and the inner diameter of the cavity formed by the reduced-diameter plates 163 is adapted to the outer diameter of the reduced-diameter column 111.

[0070] As a preferred example of the present invention, the extrusion part 165 is configured to connect the arc plate 162 to the reduced diameter plate 163, and the pressing part 11 is configured to connect the cylinder 110 to the reduced diameter column 111. During the centering process, the smaller diameter reduced diameter column 111 first enters the area enclosed by the reduced diameter plate 163. As the downward depth increases, it gradually pushes the reduced diameter plate 163 to drive the arc plate 162 to expand outward. Finally, the cylinder 110 segment is completely attached to the inner wall of the arc plate 162, completing the stable centering. This gradual mating structure can make the centering process proceed smoothly and avoid the impact and component damage caused by hard contact.

[0071] In the example of this application, the rotating assembly 23 includes a connecting cylinder 230 fixedly connected to the through hole 17 near the inner cavity of the liquid storage tank 20, a driving column 233 connected to the bottom end of the inner cavity of the connecting cylinder 230, and a pressing pipe 12 fixedly connected to the bottom end of the reducing diameter column 111. The outer peripheral wall of the driving column 233 is provided with a spiral groove 234. A U-shaped connecting frame 231 is slidably sleeved on the outer side of the driving column 233. Guide blocks 235 are connected to opposite ends on the inner side of the connecting frame 231. Each guide block 235 is slidably connected in the corresponding spiral groove 234. A driving shaft 236 is fixedly connected to the bottom end of the driving column 233. The driving shaft 236 rotates through the connecting cylinder 230 and is fixedly connected to a driving disk 24. Each cleaning brush 22 is fixedly connected to the outer peripheral wall of the driving disk 24 at equal intervals.

[0072] The inner cavity of the connecting cylinder 230 has symmetrically provided limiting grooves 232 on both sides, and the outer sides of the connecting frame 231 are fixedly connected to limiting blocks 237, and each limiting block 237 is slidably connected in the corresponding limiting groove 232.

[0073] As a preferred example of the present invention, the rotating component 23 adopts a linear and rotational conversion structure guided by a spiral groove 234. When the pressure tube 12 moves downward along the head, it pushes the connecting frame 231 to slide vertically in a straight line along the limiting groove 232 on the inner wall of the connecting cylinder 230. The guide block 235 on the inner side of the connecting frame 231 slides relative to the spiral groove 234 on the outer periphery of the drive column 233. Since the spiral groove 234 is spiral, the vertical linear motion is converted into the circumferential rotational motion of the drive column 233. This, in turn, drives the drive disc 24 and the cleaning brush 22 to rotate synchronously through the drive shaft 236, thus affecting the filter screen 21. When the surface is cleaned, the connecting frame 231 moves downward as the machine head moves upward. The guide block 235 slides in the opposite direction along the spiral groove 234, driving the drive disk 24 to rotate in the opposite direction, realizing bidirectional cleaning in the reciprocating stroke. This structure is purely mechanical linkage and does not require additional rotary drive motor and electronic control components. The cleaning action is completely synchronized with the feed and reset stroke of the machine head. Furthermore, the movement direction of the connecting frame 231 is limited by the cooperation of the limiting groove 232 and the limiting block 237, ensuring smooth and unobstructed movement. The filter surface can be automatically cleaned in each processing cycle, continuously maintaining the unobstructed flow of the filter channel.

[0074] Furthermore, six cleaning brushes 22 are provided, and the six cleaning brushes 22 are arranged at equal intervals along the outer peripheral wall of the drive disk 24. When the drive disk 24 is driven to rotate circumferentially, it drives all the cleaning brushes 22 to rotate synchronously. The cleaning range of each cleaning brush 22 is connected to each other, which can completely cover the filter surface of the filter screen 21, ensuring that the entire filter surface of the filter screen 21 can be effectively cleaned.

[0075] It should be noted that the guide block 235 is embedded in the spiral groove 234. When the connecting frame 231 is driven to make axial reciprocating linear motion, the guide block 235 slides relative to the spiral groove 234. The axial linear motion is converted into the circumferential rotational motion of the drive column through the guiding effect of the spiral groove 234. The structure and working principle of the spiral groove 234 and the guide block 235 to realize the conversion of linear motion to rotational motion are well known in the art and will not be described in detail in this specification.

[0076] In the example of this application, the inner wall of each through hole 7 is fixedly connected with a sealing tube 10, and each sealing tube 10 is provided with a plurality of liquid guiding holes 15 at equal intervals along the circumference.

[0077] As a preferred example of the present invention, a sealing pipe 10 with circumferential guide holes 15 is provided on the inner wall of the through hole 7. After the cutting fluid in the inner cavity of the pressure plate 6 enters the area of ​​the through hole 7, it cannot flow out directly from the hole in a large area. Instead, it is sprayed out towards the center of the drill bit along the guide holes 15 that are evenly distributed around the circumference of the sealing pipe 10. This forms a uniformly surrounding cooling and lubrication area around the drill bit, allowing the cutting fluid to fully act on the cutting edge of the drill bit and the workpiece machining surface, thereby improving the cooling and lubrication effect. At the same time, the sealing pipe 10 can constrain the outflow direction of the cutting fluid, limiting the cutting fluid from splashing outwards in a large area. This concentrates the cutting fluid in the area around the drill hole, making it easier to pump back later, further improving the cutting fluid recovery efficiency, reducing the accumulation of liquid and the scattering of chips on the worktable, and keeping the machining area clean.

[0078] It should be noted that the drive column 233, drive shaft 236, drive disc 24, connecting cylinder 230, pressing tube 12, connecting ring 160, through hole 17, cylinder 110, and reduced-diameter column 111 are all coaxially arranged. This coaxial arrangement of the above components ensures the coaxiality of the vertical feed action and the circumferential rotation action, avoiding off-center loading and jamming during transmission. It also ensures the centering quality of the self-centering structure and the smooth operation of the cleaning brush 22 during rotation, thus improving the overall transmission reliability and consistency of the device.

[0079] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A drilling device for a flue gas damper connecting flange assembled on a machine tool, characterized in that, include: The limiting spraying mechanism includes a mounting plate (2) that is detachably connected to the outside of the head of the multi-axis drilling machine (1). The four corners of the bottom end of the mounting plate (2) are connected to a hollow pressure plate (6) through a suction assembly. The pressure plate (6) has several through holes (7) that correspond one-to-one with the position of the drill bit of the multi-axis drilling machine (1). Each suction assembly has a reset assembly on its outer peripheral wall. The positioning mechanism includes a self-centering component (16) located in the middle of the top surface of the processing table (9) and a pressing component located at the bottom of the pressure plate (6), which corresponds to and is adapted to the position of the self-centering component (16). The pressing component first contacts and cooperates with the self-centering component (16) as the head moves down, thereby self-centering and limiting the connection flange. The processing table (9) has a liquid storage tank (20) in its inner cavity. The liquid storage tank (20) is equipped with a filter assembly. The top surface of the processing table (9) has several clearance holes (28) that correspond one-to-one with the position of the drill bit of the multi-axis drilling machine (1) and are connected to the inner cavity of the liquid storage tank (20). A liquid inlet assembly is provided between the liquid storage tank (20) and the suction assembly.

2. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 1, characterized in that, It also includes a cleaning mechanism, which includes a through hole (17) located in the middle of the surface of the processing table (9) and communicating with the inner cavity of the liquid storage tank (20), a rotating component (23) connected to the through hole (17) on the side near the liquid storage tank (20), and a number of cleaning brushes (22) connected to the drive end of the rotating component (23) and in contact with the surface of the filter component.

3. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 2, characterized in that, The filter assembly includes a filter screen (21) in a funnel structure disposed in the liquid storage tank (20). The bottom end of the filter screen (21) is connected to a chip removal pipe (18). A sealing plate (19) is fixedly connected to the lower outer peripheral wall of the chip removal pipe (18). The sealing plate (19) is detachably connected to the bottom opening of the processing table (9).

4. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 3, characterized in that, The suction assembly includes pull rods (3) connected to the four corners of the bottom of the mounting plate (2) and sleeves (4) connected to the four corners of the surface of the pressure plate (6) and corresponding to the positions of the pull rods (3). Each sleeve (4) has a piston (13) slidably connected inside it, and each pull rod (3) is connected to the corresponding piston (13).

5. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 4, characterized in that, The liquid inlet assembly includes a liquid suction hole (25) and a liquid outlet hole (26) on both sides of the bottom end of the inner cavity of each sleeve (4). Each liquid suction hole (25) and liquid outlet hole (26) penetrates the pressure plate (6) and is connected to its inner cavity. A conduit (14) is connected between two liquid suction holes (25) on the same side. Each conduit (14) is connected to a hose (8). The other end of each hose (8) penetrates the processing table (9) and extends to the lower part of the inner cavity of the liquid storage tank (20). A first one-way valve (27) and a second one-way valve (29) are respectively installed in each liquid suction hole (25) and each liquid outlet hole (26).

6. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 5, characterized in that, The reset assembly includes a reset spring (5) sleeved on the outside of the same pull rod (3) and sleeve (4), and the two ends of the reset spring (5) are connected to the pressure plate (6) and the mounting plate (2) respectively.

7. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 6, characterized in that, The self-centering component (16) includes a connecting ring (160) fixedly connected to the middle of the surface of the processing table (9). The inner cavity of the connecting ring (160) is provided with a plurality of pushing parts (161). The outer end of each pushing part (161) is fixedly connected to a connecting block (164). Each connecting block (164) slides through the connecting ring (160) and is fixedly connected to a pressing part (165). The pressing component includes a pressing part (11) fixedly connected to the middle of the bottom end of the pressure plate (6).

8. The drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 7, characterized in that, The pushing part (161) includes an arc plate (162), and a reducing plate (163) is fixedly connected to the bottom end of each arc plate (162). The reducing plate (163) is narrowed along the axial direction of the arc plate (162). The pressing part (11) includes a cylinder (110) and a reduced-diameter column (111) connected to the bottom end of the cylinder (110). The reduced-diameter column (111) is narrowed along the axial direction of the cylinder (110). The inner diameter of the cavity formed by the arc plates (162) is adapted to the outer diameter of the cylinder (110), and the inner diameter of the cavity formed by the reduced-diameter plates (163) is adapted to the outer diameter of the reduced-diameter column (111).

9. A drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 8, characterized in that, The rotating assembly (23) includes a connecting cylinder (230) fixedly connected to the inner cavity of the through hole (17) near the liquid storage tank (20), a driving column (233) connected to the bottom end of the inner cavity of the connecting cylinder (230), and a pressing pipe (12) fixedly connected to the bottom end of the reduced diameter column (111). The outer peripheral wall of the driving column (233) is provided with a spiral groove (234). A U-shaped connecting frame (231) is slidably sleeved on the outer side of the driving column (233). Guide blocks (235) are connected to the opposite ends of the inner side of the connecting frame (231). Each guide block (235) is slidably connected in the corresponding spiral groove (234). A driving shaft (236) is fixedly connected to the bottom end of the driving column (233). The driving shaft (236) rotates through the connecting cylinder (230) and is fixedly connected to the driving disk (24). Each cleaning brush (22) is fixedly connected to the outer peripheral wall of the driving disk (24) at equal intervals. The inner cavity of the connecting cylinder (230) is symmetrically provided with limiting grooves (232), and the outer sides of the connecting frame (231) are fixedly connected with limiting blocks (237). Each limiting block (237) is slidably connected in the corresponding limiting groove (232).

10. A drilling device for a flue gas damper connecting flange assembled on a machine tool according to claim 9, characterized in that, Each of the through holes (7) has a sealing tube (10) fixedly connected to its inner wall, and each of the sealing tubes (10) has a plurality of liquid guiding holes (15) equidistantly spaced along the circumference.

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