Drilling and tapping device for air duct die casting

Abstract

The utility model provides an air duct die casting drilling and tapping device, and relates to the field of die casting tapping, the air duct die casting drilling and tapping device comprises a machining mechanism, the machining mechanism comprises a mounting seat, an index plate, a driving box and a material placing seat, the index plate is fixedly arranged on the mounting seat, the driving box drives the index plate to rotate, and a positioning pin used for center positioning of a die casting is fixed on the material placing seat; a lifter is further arranged on one side of the index plate, the fixed end of the lifter is installed on the installation base, a U-shaped base is fixed to the movable end of the lifter, and a machining head is installed on the U-shaped base; the clamping mechanism is arranged between the index plate and the driving box, the clamping mechanism can achieve automatic pressing or disengaging of the die castings through rotation of the index plate and under the action of the driving ring, the stability of the die castings in the drilling and tapping work is guaranteed during pressing, the die castings can be conveniently taken and placed on the material placing base during disengaging, and the die castings can be conveniently taken and placed on the material placing base. And the controllability and the consistency of the linkage setting are improved.

Description

Technical Field

[0001] This application relates to the field of tapping die-cast parts, and more specifically, to a drilling and tapping device for air duct die-cast parts. Background Technology

[0002] Tapping die-cast parts typically involves forming the bottom hole in a mold, followed by tapping using a tapping machine. Current technology generally uses cutting or extrusion methods for tapping, but these methods inevitably leave zinc shavings and thread residue within the thread. This isn't a major issue for products with low requirements; however, for die-cast parts such as circuit board brackets for car antennas (made of zinc alloy), zinc shavings and thread residue are unacceptable. This is because the circuit board surface must be free of metal shavings or dust, otherwise it can cause short circuits and component failure.

[0003] A search revealed Chinese patent application (publication) number 201610638188.1, which discloses a semi-automatic rotary die-casting tapping device and its usage method. The device includes a worktable, a rotary table on the worktable, and workstations on the rotary table. Around the rotary table, at equal intervals, are arranged an incoming material inspection mechanism, a product reaming machine, a product cleaning mechanism, a product tapping machine, a zinc chip cleaning mechanism, a thread inspection mechanism, and an automatic material discharge mechanism. It possesses the technical benefits of "completely solving the problem of residual shavings in threaded holes by designing the die-casting bottom hole and adding a reaming process, and developing a semi-automatic device for reaming, tapping, chip removal, and thread inspection, thus ensuring product quality; simultaneously, the full inspection efficiency is increased from 60 pcs / H to 600 pcs / H, resulting in a significant improvement in full inspection efficiency."

[0004] In practical use, it has been found that when the drill bit is in use, its surface may carry residues. If these residues are not cleaned in time, they will reduce drilling accuracy, accelerate tool wear, and affect the cooling effect. Secondly, the lack of reliable circumferential and axial clamping during the machining process may cause the die-cast part to rotate or run out, which will affect the machining accuracy. Summary of the Invention

[0005] The purpose of this application is to provide a drilling and tapping device for air duct die castings, which can solve the technical problems of the inability to clean the residue on the drill bit surface and the poor stability of the die castings.

[0006] This application provides a drilling and tapping device for die casting of air duct, including a processing mechanism. The processing mechanism includes a mounting base, an indexing plate, a drive box, and a material placement seat. The indexing plate is fixedly mounted on the mounting base. The drive box drives the indexing plate to rotate. The material placement seat is fixed with a positioning pin for center positioning of the die casting.

[0007] A lifting device is also provided on one side of the indexing plate. The fixed end of the lifting device is mounted on the mounting base, and a U-shaped seat is fixed on the movable end of the lifting device. A processing head is mounted on the U-shaped seat, and a driver is fixed on the U-shaped seat. The driver drives the processing head to rotate through a universal coupling.

[0008] The material placement seat is provided with a clamping mechanism, which includes an inner clamping plate and an outer clamping plate that are movably installed on the material placement seat and clamp the die casting from the inside and outside. The bottom of the material placement seat is provided with a drive seat, and a universal bullseye wheel is installed at the bottom of the drive seat. A drive ring that cooperates with the universal bullseye wheel is fixed at the upper end of the drive box. The drive ring has an upper part and a lower part.

[0009] Furthermore, a first spring is provided between the outer clamping plate and the inner clamping plate to abut against each other, so that the two are disengaged from the clamping by the first spring. A second spring is provided between the drive seat and the swing seat to abut against each other, so that the drive seat is reset to the normal state by the second spring. The locking bolt passes through the drive seat and is screwed to the swing seat, and the second spring is also sleeved on the outside of the locking bolt.

[0010] Furthermore, a first inclined block is fixed to the bottom of the outer clamping plate, a second inclined block is fixed to the bottom of the inner clamping plate, and a driving inclined block that cooperates with the first and second inclined blocks is fixed to the top of the driving seat. When the driving inclined block moves upward, the outer clamping plate and the inner clamping plate clamp the die-casting part by squeezing it with the first and second inclined blocks.

[0011] Furthermore, the material handling seat is provided with a movable groove for the outer clamping plate and the inner clamping plate to move. A sealing block is inserted into the outer end of the movable groove, and the sealing block is fixed by a through fastener.

[0012] Furthermore, a pressing mechanism is installed at the bottom of the U-shaped seat. The pressing mechanism includes a guide sleeve fixed to the bottom of the U-shaped seat and a pressure rod that runs vertically through the guide sleeve. The bottom of the pressure rod is provided with a pressure plate that axially presses the die-cast part. A pressing spring is abutting between the pressure plate and the guide sleeve.

[0013] Furthermore, a cleaning component located on the side of the processing head is installed above the mounting base. The cleaning component includes a support platform vertically fixed on the mounting base and a telescopic device horizontally fixed on the support platform. The output end of the telescopic device is provided with an adjustment plate, and the front end of the adjustment plate is provided with a brush that can contact the processing head after being pushed forward by the telescopic device.

[0014] Furthermore, the output end of the telescopic device is threaded with a locking nut, and the adjusting plate is adjustablely connected to the telescopic device via the locking nut.

[0015] Furthermore, an air tube is installed on the mounting base.

[0016] The beneficial effects of this utility model are:

[0017] This utility model sets up a clamping mechanism between the indexing plate and the drive box. The clamping mechanism can automatically clamp or release the die casting by rotating the indexing plate and under the action of the drive ring. When clamping, it ensures the stability of the die casting during drilling and tapping. When releasing, it facilitates the picking and placing of the die casting on the material holder. The controllability and consistency of its linkage setting are improved.

[0018] This utility model features a clamping mechanism installed below the U-shaped base, which uses the downward pressure of a lifter to press the die-casting part downward. The clamping mechanism has a simple and reliable structure and is linked with the lifter to improve the fit between the parts. It has high controllability and can ensure consistent clamping force, thus preventing the parts from jumping during drilling and tapping.

[0019] This invention features a cleaning component on the machining mechanism that works in conjunction with the drilling and tapping station. After drilling and tapping, the brush on the cleaning component is pushed forward to contact the machining head. As the machining head rotates and the lifting device moves the machining head upward, the brush can effectively remove the residue from the surface of the machining head, thereby preventing the reduction of drilling accuracy and the aggravation of tool wear caused by the attached residue, thus improving durability and drilling and tapping accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0022] Figure 2 This is a front view of an embodiment of the present utility model;

[0023] Figure 3 This is a side view of an embodiment of the present invention;

[0024] Figure 4 This is a top view of an embodiment of the present invention;

[0025] Figure 5 This is a partial enlarged side view of the indexing plate, the material handling seat, and the clamping mechanism in one embodiment of the present invention;

[0026] Figure 6 This is a partial cross-sectional view of the clamping mechanism under normal operating conditions in one embodiment of the present invention;

[0027] Figure 7 This is a partial cross-sectional view of the clamping mechanism in one embodiment of the present invention when it is clamped.

[0028] Figure 8 This is a half-sectional view of the clamping mechanism in one embodiment of the present invention;

[0029] Figure 9 This is an exploded view of the clamping mechanism in one embodiment of the present invention;

[0030] Figure 10 for Figure 9 A bottom view;

[0031] Figure 11 This is an enlarged view of the indexing plate in one embodiment of the present invention;

[0032] Figure 12 This is an enlarged view of the drive ring in one embodiment of the present invention;

[0033] Figure 13 This is an enlarged view of the clamping mechanism in one embodiment of the present invention;

[0034] Figure 14 This is an enlarged view of the cleaning component in one embodiment of the present invention.

[0035] The reference numerals in the attached figures are as follows:

[0036] 1. Machining mechanism; 11. Mounting base; 12. Drive box; 13. Indexing plate; 131. Movable hole; 14. Loading seat; 141. Positioning pin; 142. Movable groove; 15. Lifting device; 16. U-shaped seat; 17. Machining head; 18. Driver; 19. Universal coupling; 2. Clamping mechanism; 21. Outer clamping plate; 211. First inclined block; 22. Inner clamping plate; 221. Second inclined block; 23. Drive base; 231. Drive inclined plane 24. Universal bullseye wheel; 25. Drive ring; 251. Upper part; 252. Lower part; 26. First spring; 27. Second spring; 28. Locking bolt; 29. ​​Sealing block; 210. Fastener; 3. Pressing mechanism; 31. Guide sleeve; 32. Pressure rod; 33. Pressure plate; 34. Pressing spring; 4. Cleaning component; 41. Support platform; 42. Telescopic device; 43. Adjusting plate; 44. Brush; 45. Locking nut; 5. Air pipe. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and 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 this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] This application discloses a drilling and tapping device for die-cast air ducts.

[0044] Reference Figure 1-12, a drilling and tapping device for die casting of air duct, including a processing mechanism 1, the processing mechanism 1 including a mounting base 11, an indexing plate 13, a drive box 12, and a material placement seat 14, the indexing plate 13 is fixedly mounted on the mounting base 11, the drive box 12 drives the indexing plate 13 to rotate, and a positioning pin 141 for center positioning of the die casting is fixed on the material placement seat 14.

[0045] A lifting device 15 is also provided on one side of the indexing plate 13. The fixed end of the lifting device 15 is installed on the mounting base 11, and a U-shaped seat 16 is fixed on the movable end of the lifting device 15. A processing head 17 is installed on the U-shaped seat 16. The processing head 17 includes a drilling head and a tapping head. A driver 18 is fixed on the U-shaped seat 16. The driver 18 can be a servo motor. The driver 18 drives the processing head 17 to rotate through a universal coupling 19.

[0046] A clamping mechanism 2 is provided on the material placement base 14. The clamping mechanism 2 includes an inner clamping plate 22 and an outer clamping plate 21, which are movably mounted on the material placement base 14 and clamp the die-casting part from the inside and outside. A drive base 23 is provided at the bottom of the material placement base 14. A universal eye wheel 24 is installed at the bottom of the drive base 23. A drive ring 25 that cooperates with the universal eye wheel 24 is fixed at the upper end of the drive box 12. Figure 12 As shown, the drive ring 25 has an upper part 251 and a lower part 252. The drive ring 25 is concentric with the indexing plate 13. When the drive ring 25 is located at the upper part 251, the clamping mechanism 2 is in a clamping state; when it is located at the lower part 252, the clamping mechanism 2 is in a releasing state. This allows the action of the clamping mechanism 2 to be linked with the rotation of the indexing plate 13, achieving automation. To make the universal bullseye wheel 24 and the drive ring 25 cooperate more smoothly, lubricating oil can be applied to reduce friction. The clamping mechanism 2 can automatically release or clamp the die-casting part through the rotational force of the indexing plate 13 on the drive box 12. The clamping mechanism 2 is in a releasing state at the loading and unloading station and in a clamping state at the processing station. Figure 11 As shown, the indexing plate 13 has an active hole 131 for at least part of the clamping mechanism 2 to be accommodated. The clamping mechanism 2 can position the die casting in the circumferential direction, preventing the die casting from deviating in the circumferential direction during drilling and tapping, thereby improving the machining accuracy.

[0047] Reference Figure 6 -10, wherein a first spring 26 is provided between the outer clamping plate 21 and the inner clamping plate 22 to abut against each other. The first spring 26 disengages the two plates from each other. The outer clamping plate 21 can be installed along the movable groove 142, and the inner clamping plate 22 can be installed through the bottom opening of the positioning pin 141. Then, the first spring 26 is installed between the two plates. Figure 6 and Figure 7As shown, the rectangular block at the top of the drive seat 23 can limit the range of motion of the inner clamping plate 22, so as to facilitate assembly. A second spring 27 is provided between the drive seat 23 and the swing seat 14. The drive seat 23 is reset to the normal state by the second spring 27. The locking bolt 28 passes through the drive seat 23 and is screwed to the swing seat 14. After the locking bolt 28 is fixed at the bottom of the swing seat 14, a vertical movement space is formed for the drive seat 23. Then, the second spring 27 provides support and ensures stable cooperation between the structures.

[0048] Reference Figure 6-10 The outer clamping plate 21 has a first inclined block 211 fixed at its bottom, the inner clamping plate 22 has a second inclined block 221 fixed at its bottom, and the drive seat 23 has a drive inclined block 231 fixed at its top, which cooperates with the first inclined block 211 and the second inclined block 221. When the drive inclined block 231 moves upward, it clamps the die-casting part by pressing with the first inclined block 211 and the second inclined block 221. The drive seat 23 drives the outer clamping plate 21 and the inner clamping plate 22 at the same time, which can clamp the die-casting part inside and outside at the same time. The contact surface between the outer clamping plate 21 and the inner clamping plate 22 is large, which can not only ensure the clamping reliability of the thin-walled die-casting part, but also avoid indentation and ensure product quality.

[0049] Reference Figure 6 -10, wherein the material placement seat 14 is provided with a movable groove 142 for the outer clamping plate 21 and the inner clamping plate 22 to move. A sealing block 29 is inserted into the outer end of the movable groove 142. The sealing block 29 is fixed by a through fastener 210. The cooperation between the movable groove 142 and the sealing block 29 facilitates the disassembly and assembly of the outer clamping plate 21. At the same time, the fastener 210 ensures the stability of the sealing block 29.

[0050] Reference Figure 13 The U-shaped seat 16 has a pressing mechanism 3 installed at its bottom. The pressing mechanism 3 includes a guide sleeve 31 fixed at the bottom of the U-shaped seat 16 and a pressure rod 32 that runs vertically through the guide sleeve 31. The bottom of the pressure rod 32 is provided with a pressure plate 33 that axially presses the die-casting part. A pressure spring 34 is abutting between the pressure plate 33 and the guide sleeve 31. The cleaning component 4 shown in the figure is in normal condition. When the pressure plate 33 contacts the die-casting part, the guide sleeve 31 will continue to move down with the U-shaped seat 16. At this time, the guide sleeve 31 moves downward and the pressure spring 34 is gradually compressed. The top of the pressure rod 32 is provided with a nut. The nut only engages with the thread of the pressure rod 32 and does not press against the guide sleeve 31.

[0051] Reference Figure 14A cleaning component 4 is installed above the mounting base 11 on the side of the processing head 17. The cleaning component 4 can clean the surface debris of the processing head 17 by rotating the processing head 17 and lifting it upward with the lifting device 15. Because the processing head 17 is rotating during the up-and-down reciprocating process, the cleaning component 4 includes a support platform 41 that is vertically fixed on the mounting base 11. The bottom of the support platform 41 is provided with a waist-shaped groove that cooperates with the locking part. The telescopic device 42 is horizontally fixed on the support platform 41. The output end of the telescopic device 42 is provided with an adjusting plate 43. The front end of the adjusting plate 43 is provided with a brush 44 that can contact the processing head 17 after being pushed forward by the telescopic device 42.

[0052] Reference Figure 14 The telescopic device 42 can be a dual-axis cylinder, a linear guide, a single-axis cylinder, etc. Its output end is fixed with a screw, and a locking nut 45 is connected to the screw. The adjusting plate 43 has an adjusting groove inside. When the locking nut 45 is loosened, the adjusting plate 43 can move back and forth or rotate, and then be pressed by the locking nut 45 to ensure that the brush 44 can contact the processing head 17 after it is extended.

[0053] Reference Figure 1-4 An air pipe 5 is installed on the mounting base 11. The air pipe 5 can cool the workpiece or blow away debris by connecting to an air supply device, which can be an air pump.

[0054] The implementation principle of the drilling and tapping device for air duct die castings in this application embodiment is as follows:

[0055] The die-cast part is placed on the positioning pin 141 of the material placement seat 14. The drive box 12 is equipped with a motor that drives the indexing plate 13 to rotate. The motor rotates the material placement seat 14 and the die-cast part to the processing station. At this time, the corresponding driver 18 drives the corresponding processing head 17 at high speed through the universal coupling 19. The lifting device 15 drives the U-shaped seat 16 to move down. During this process, the processing head 17 processes the die-cast part at the corresponding position. After the processing is completed, the indexing plate 13 rotates again to continue processing.

[0056] The specific workflow of clamping mechanism 2 is as follows: Figures 5-6The clamping mechanism 2 shown is in the released state. At this time, the universal bullseye wheel 24 is located on the lower part 252 of the drive ring 25. The outer clamping plate 21 and the inner clamping plate 22 are in a state of separation under the action of the first spring 26. The drive seat 23 is located at the bottom under the action of the second spring 27. At this time, the thin-walled die-cast part to be processed is placed outside the positioning pin 141 in a fitting manner. As the indexing plate 13 rotates, the universal bullseye wheel 24 moves from the lower part 252 to the upper part 251, forming an upward movement of the universal bullseye wheel 24 and driving the drive seat 23 to move upward synchronously. As the die-casting moves, the second spring 27 is compressed, and the driving inclined block 231 pushes the first inclined block 211 and the second inclined block 221. The first spring 26 is compressed, and the outer clamping plate 21 and the inner clamping plate 22 clamp the bottom of the outer wall of the die-casting from the inside and outside. During the process of the universal bullseye wheel 24 in the upper part 251, the die-casting is always in a clamped state. During this process, the die-casting is drilled and tapped. When the universal bullseye wheel 24 rolls to the lower part 252, the clamping mechanism 2 disengages from the clamp, and the operator can easily pick up and put down the die-casting.

[0057] During the process of the lifting device 15 driving the U-shaped seat 16 to move downward, the pressure plate 33 presses down on the two die-cast parts on the swing seat 14 at the same time. As the U-shaped seat 16 continues to move downward, the compression spring 34 will be compressed accordingly, and the guide sleeve 31 moves downward outside the pressure rod 32. During this process, the die-cast parts are axially limited by the downward force of the lifting device 15 and the compression spring 34.

[0058] After drilling and tapping are completed, the machining head 17 moves upward under the action of the lifting device 15. At this time, the machining head 17 does not stop running. The telescopic device 42 extends the brush 44 forward and contacts the machining head 17. With the rotation of the machining head 17 and the upward movement of the lifting device 15, the brush 44 can fully clean the residue on the surface of the machining head 17. When the machining head 17 moves downward again, the telescopic device 42 retracts the brush 44.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A kind of air duct pressure casting drilling and tapping device, including processing mechanism (1), the processing mechanism (1) includes mounting seat (11), index plate (13), drive box (12), and swing seat (14), the index plate (13) is fixedly arranged on the mounting seat (11), the drive box (12) drives the index plate (13) rotation, the swing seat (14) is fixed with the positioning pin (141) for pressure casting center positioning, characterized in that One side of the index plate (13) is also provided with lifter (15), the fixed end of the lifter (15) is installed on mounting seat (11), the movable end of the lifter (15) is fixed with U-shaped seat (16), the U-shaped seat (16) is installed with processing head (17), the U-shaped seat (16) is fixed with driver (18), the driver (18) is driven by universal coupling (19) and makes the processing head (17) rotate; The swing seat (14) is provided with clamping mechanism (2), the clamping mechanism (2) includes inner clamping plate (22) and outer clamping plate (21) that are movably installed on swing seat (14) and clamp pressure casting from inside and outside, the bottom of the swing seat (14) is equipped with driving seat (23), the bottom of the driving seat (23) is installed with universal cow eye wheel (24), the upper end of the drive box (12) is fixed with the driving ring (25) matched with universal cow eye wheel (24), the driving ring (25) has upper part (251) and lower part (252).

2. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: First spring (26) is arranged between the outer clamping plate (21) and the inner clamping plate (22) and abuts each other, second spring (27) is arranged between the driving seat (23) and the swing seat (14) and abuts, locking bolt (28) is penetrated through the driving seat (23) and is screw locked with the swing seat (14) after.

3. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: The bottom of the outer clamping plate (21) is fixed with first inclined surface block (211), the bottom of the inner clamping plate (22) is fixed with second inclined surface block (221), the top of the driving seat (23) is fixed with driving inclined surface block (231) matched with first inclined surface block (211) and second inclined surface block (221).

4. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: The swing seat (14) is provided with movable slot (142) for the movement of the outer clamping plate (21) and the inner clamping plate (22), the outer end of the movable slot (142) is inserted with plugging block (29), the plugging block (29) is fixed by penetrating fastener (210).

5. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: The bottom of the U-shaped seat (16) is installed with pressing mechanism (3), and the pressing mechanism (3) includes guide sleeve (31) fixed on the bottom of the U-shaped seat (16) and pressure rod (32) vertically penetrating in the guide sleeve (31), the bottom of the pressure rod (32) is provided with pressure plate (33), and the pressure plate (33) and the guide sleeve (31) abut with pressing spring (34).

6. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: The cleaning component (4) is arranged on the side of the processing head (17) above the mounting base (11), and comprises a supporting table (41) fixed vertically on the mounting base (11) and an extender (42) fixed horizontally on the supporting table (41), wherein the output end of the extender (42) is provided with an adjusting plate (43), and the front end of the adjusting plate (43) is provided with a brush (44).

7. The air duct pressure casting drilling and tapping device according to claim 6, characterized in that: The output end of the extender (42) is threadedly connected with a locking nut (45), and the adjusting plate (43) is adjustably connected with the extender (42) through the locking nut (45).

8. The air duct pressure casting drilling and tapping device according to claim 1, characterized in that: The mounting base (11) is provided with an air pipe (5).

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