Multi-station tapping machine

Abstract

The invention relates to the technical field of tapping machines and discloses a multi-station tapping machine which comprises a base, a connecting cylinder is fixedly connected to the upper surface of the base, a supporting shell is fixedly connected to the upper surface of the connecting cylinder, and a drainage mechanism is fixedly connected to the outer surface of the supporting shell. A drainage mechanism is arranged on the upper surface of the base and used for discharging waste water generated by tapping cooling, a rotating panel is rotationally connected to the upper surface of the drainage mechanism, a positioning unit is arranged on the upper surface of the rotating panel and used for positioning and clamping parts needing to be tapped, a first supporting frame is fixedly connected to the upper surface of the base, and a second supporting frame is fixedly connected to the lower surface of the first supporting frame. And a tapping drilling machine is fixedly connected to the end of the first supporting frame, a weeping pipe penetrates through the upper surface of the first supporting frame and extends to the position over the positioning unit, and the effect of conducting multi-station tapping on the part is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tapping machines, and more particularly to a multi-station tapping machine. Background Art

[0002] A tapping machine is a special machine tool for machining internal threads and is widely used in fields such as mechanical manufacturing, automotive, aerospace, etc. Its working principle is to cut precise internal threads in a pre-drilled bottom hole by rotating a tap, and it has the characteristics of high efficiency, high precision, and simple operation. Tapping machines can be divided into various types according to the driving method, such as manual, pneumatic, and electric. Among them, numerically controlled tapping machines can achieve automated processing through program control, greatly improving production efficiency and thread quality. Structurally, a tapping machine usually consists of a main shaft, a feeding mechanism, a clamping device, and a control system. Some models are also equipped with a coolant system to reduce cutting heat and extend the life of the tap. Its processing range covers a variety of thread specifications, such as metric threads, imperial threads, and pipe threads, and can adapt to different materials, such as steel, cast iron, aluminum alloy, and plastic. To ensure processing accuracy, tapping machines need to be regularly maintained, including lubricating moving parts, calibrating the perpendicularity of the main shaft, and checking the wear of the tap.

[0003] If a tapping machine cannot achieve multi-station simultaneous processing during the tapping process, it will have a significant impact on production efficiency and processing consistency. Since single-station operation can only complete the processing of one threaded hole at a time, when there are multiple threaded holes on a workpiece, it is necessary to repeatedly perform clamping, positioning, and processing, which not only prolongs the overall production cycle but also increases the labor intensity of the operator. At the same time, frequent repeated positioning is likely to cause cumulative errors, making it difficult to maintain the same positional accuracy between different threaded holes, affecting the assembly quality and service performance of the workpiece. In addition, single-station tapping is difficult to achieve continuous automated production, resulting in reduced equipment utilization rate during batch processing, unable to fully utilize the advantages of high-speed tapping, and thus increasing the unit processing cost. Summary of the Invention

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A multi-station tapping machine includes a base. The upper surface of the base is fixedly connected with a connecting cylinder. The upper surface of the connecting cylinder is fixedly connected with a support shell. The outer surface of the support shell is fixedly connected with a drainage mechanism, which is used to discharge the waste water generated by tapping cooling. The upper surface of the drainage mechanism is rotatably connected with a rotating panel. The upper surface of the rotating panel is provided with a positioning unit, which is used to position and clamp the parts to be tapped. The upper surface of the base is fixedly connected with a first support frame. The end of the first support frame is fixedly connected with a tapping drill. The upper surface of the first support frame is penetrated by a drip water pipe, which extends directly above the positioning unit. When tapping metal parts, a large amount of heat will be generated. Therefore, when tapping, it is necessary to drip water to cool the tapping position. By setting the drainage mechanism, the waste water generated by tapping metal parts can be discharged, and at the same time, a large amount of suction can be generated during drainage, so that when the rotating panel and the positioning unit rotate to the drainage mechanism, the parts in the positioning unit can be automatically discharged. By setting the positioning unit, when tapping the parts, the parts to be tapped can be positioned, so that the parts will not loosen during tapping, and at the same time, when the rotating panel rotates to the position of the drainage mechanism, the positioned parts can be automatically discharged. By setting the tapping drill, it can contact the parts to complete the tapping work of the parts. By setting the drip water pipe, the high temperature generated during tapping can be cooled down.

[0005] Preferably, a first stepping motor is fixedly connected to the inner wall of the connecting cylinder. The output end of the first stepping motor is installed with a rotating disk through a coupling. The rotating disk is fixedly connected to the inner ring of the rotating panel. By setting the first stepping motor, during operation, the rotating disk can drive the rotating panel to rotate.

[0006] Preferably, the drainage mechanism includes a drainage ring, which is fixedly connected to the inner wall of the support shell. The lower surface of the drainage ring is penetrated by a drainage pipe. The upper surface of the drainage ring is fixedly connected with a limiting groove. A ball is rotatably connected to the inner cavity of the limiting groove. The ball is frictionally adapted to the lower surface of the rotating panel. By setting the drainage ring and the drainage pipe, the waste water on the lower surface of the rotating panel can be collected and discharged. By setting the limiting groove and the ball, the rotating panel can rotate stably on the upper surface of the drainage ring when rotating.

[0007] Preferably, a second support frame is fixedly connected to the outer surface of the drainage ring. The end of the second support frame is fixedly connected to an air box. A first connecting pipe penetrates through one side of the air box close to the drainage ring, and the end of the first connecting pipe penetrates through the drainage ring. By providing the second support frame, the air box can be connected to the outer surface of the drainage ring. By providing the first connecting pipe, the drainage ring and the air box can be communicated. Thus, when an air flow is generated inside the air box, the air flow enters the inner cavity of the drainage ring.

[0008] Preferably, a second connecting pipe penetrates through the side of the air box away from the first connecting pipe. The top end of the second connecting pipe is fixedly connected to an air suction port. A first rubber ring is fixedly connected to the outer surface of the air suction port. By providing the second connecting pipe and the air suction port, when an air flow is generated inside the air box, an air flow can flow out at the opening of the air suction port.

[0009] Preferably, a third support frame is fixedly connected to the inner wall of the air box. The end of the third support frame is fixedly connected to a second stepping motor. The output end of the second stepping motor is installed with a fan blade through a coupling. By providing the second stepping motor, after the power supply is connected and the switch is turned on, the fan blade can rotate, thereby generating an air flow in the inner cavity of the air box. Then, the outside air enters the inner cavity of the air box through the air suction port and finally discharges from the drainage ring.

[0010] Preferably, the positioning unit includes a connecting bottom plate, a positioning mechanism, and a discharging mechanism. The connecting bottom plate is fixedly connected to the upper surface of the rotating panel. A one-way valve penetrates through the upper surface of the rotating panel and is located inside the cavity of the connecting bottom plate. The positioning mechanism includes a placing box, and the placing box is fixedly connected to the upper surface of the connecting bottom plate. By providing the one-way valve, the water flow on the upper surface of the rotating panel can enter the inner cavity of the drainage ring, and the air in the inner cavity of the drainage ring will not enter the space on the upper surface of the rotating panel through the one-way valve. By providing the placing box, the parts to be tapped can be placed.

[0011] Preferably, a placing frame is fixedly connected to the inner wall of the placing box. The bottom surface of the inner cavity of the placing frame is fixedly connected with a clamping plate, and the bottom surface of the inner cavity of the placing frame is fixedly connected with a positioning plate. A positioning hole is formed in the bottom surface of the inner cavity of the placing frame. A rotating rod is rotatably connected to the inner cavity of the placing box. A fourth support frame is fixedly connected to the outer surface of the rotating rod, and the top end of the fourth support frame is fixedly connected with a clamping plate. By providing the clamping plate and the positioning plate, the parts placed in the inner cavity of the placing frame can be limited, so that the position where the parts need to be drilled is aligned with the positioning hole. By providing the clamping plate, the placed parts can be held in place.

[0012] Preferably, a gear is fixedly connected to the end of the rotating rod. An extrusion plate is fixedly connected to the upper surface of the end of the rotating rod. An arc-shaped rod is fixedly connected to the outer surface of the extrusion plate. A spring is sleeved on the outer surface of the arc-shaped rod. A limiting ring is sleeved on the outer surface of the arc-shaped rod. The limiting ring is fixedly connected to the outer side surface of the placing box. The discharging mechanism includes a fifth support frame. The fifth support frame is fixedly connected to the outer surface of the placing box. A limiting tube is fixedly connected to the end of the fifth support frame. A sliding rod is slidably connected to the inner cavity of the limiting tube. A toothed plate is fixedly connected to the end of the sliding rod. The toothed plate meshes with the gear. A sliding block is fixedly connected to the end of the toothed plate. A track groove is sleeved on the outer surface of the sliding block. The track groove is fixedly connected to the outer side surface of the placing box. By providing the extrusion plate, under the action of the spring and the limiting ring, the rotating rod can always be subjected to a squeezing force, so that the rotating rod drives the clamping plate to clamp and squeeze the part. By providing the limiting tube, the sliding rod can be limited, so that the sliding rod moves horizontally in the inner cavity of the limiting tube, so that the toothed plate moves forward, so that the gear rotates, and finally the clamping plate no longer squeezes the part, and finally the part can be automatically discharged. By providing the sliding block and the track groove, the toothed plate can move horizontally stably.

[0013] Preferably, a third connecting pipe is fixedly connected to the end of the limiting tube. A transfer box is fixedly connected to the end of the third connecting pipe. A second rubber ring is fixedly connected to the outer surface of the transfer box. The second rubber ring is in squeezing fit with the first rubber ring. By providing the transfer box and the second rubber ring, when it rotates to align with the first rubber ring, the first rubber ring and the second rubber ring can be in close contact, and finally the air flow can enter the inner cavity of the transfer box.

[0014] The present invention provides a multi-station tapping machine. It has the following beneficial effects:

[0015] First, in this multi-station tapping machine, by providing a drainage mechanism, the wastewater generated by tapping metal parts can be discharged, and at the same time, a large amount of suction can be generated during drainage, so that when the rotating panel and the positioning unit rotate to the drainage mechanism, the parts in the positioning unit can be automatically discharged.

[0016] Second, in this multi-station tapping machine, by providing a positioning unit, when tapping parts, the parts to be tapped can be positioned, so that when tapping the parts, the parts will not loosen, and at the same time, when the rotating panel rotates to the position of the drainage mechanism, the positioned parts can be automatically discharged.

[0017] Third, in this multi-station tapping machine, by providing a tapping drill, it can contact the parts to complete the tapping work of the parts. By providing a drip water pipe, the high temperature generated during tapping can be cooled. Description of the Drawings

[0018] Figure 1 This is a schematic diagram of the external structure of a multi-station tapping machine according to the present invention;

[0019] Figure 2 This is a side view of the structure of a multi-station tapping machine according to the present invention;

[0020] Figure 3 This is a schematic diagram of the partial structure of a multi-station tapping machine according to the present invention;

[0021] Figure 4 This is a schematic diagram of the sectional structure of a multi-station tapping machine according to the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the drainage mechanism according to the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the positioning unit according to the present invention;

[0024] Figure 7 This is a schematic diagram of the partial structure of the positioning unit according to the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the positioning mechanism according to the present invention;

[0026] Figure 9 This is a schematic diagram of the sectional structure of the positioning mechanism according to the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of the discharging mechanism according to the present invention.

[0028] In the figure: 1, base; 2, connecting cylinder; 3, first stepping motor; 4, rotating disk; 5, rotating panel; 6, support shell; 7, drainage mechanism; 8, positioning unit; 9, first support frame; 10, tapping drill; 11, drip pipe; 12, one-way valve; 71, drainage ring; 72, limiting groove; 73, ball; 74, drain pipe; 75, first connecting pipe; 76, air box; 77, second support frame; 78, third support frame; 79, second stepping motor; 710, fan blade; 711, second connecting pipe; 712, suction port; 713, first rubber ring; 81, connecting base plate; 82, positioning mechanism; 83, discharging mechanism; 821, placing box; 822, placing frame; 823, clamping plate; 824, positioning plate; 825, positioning hole; 826, rotating rod; 827, fourth support frame; 828, clamping plate; 829, gear; 8210, pressing plate; 8211, arc rod; 8212, limiting ring; 8213, spring; 831, fifth support frame; 832, limiting pipe; 833, third connecting pipe; 834, transfer box; 835, second rubber ring; 836, sliding rod; 837, toothed plate; 838, sliding block; 839, track groove. Detailed implementation mode

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0030] As Figures 1-10 shown, the present invention provides a technical solution: a multi-station tapping machine, including a base 1. A connecting cylinder 2 is fixedly connected to the upper surface of the base 1. A support shell 6 is fixedly connected to the upper surface of the connecting cylinder 2. A drainage mechanism 7 is fixedly connected to the outer surface of the support shell 6. The drainage mechanism 7 is used to discharge the waste water generated by tapping cooling. A rotating panel 5 is rotatably connected to the upper surface of the drainage mechanism 7. A positioning unit 8 is arranged on the upper surface of the rotating panel 5. The positioning unit 8 is used to position and clamp the parts to be tapped. A first support frame 9 is fixedly connected to the upper surface of the base 1. A tapping drill 10 is fixedly connected to the end of the first support frame 9. A drip water pipe 11 penetrates through the upper surface of the first support frame 9 and extends directly above the positioning unit 8. When tapping metal parts, a large amount of heat will be generated. Therefore, when tapping, it is necessary to drip water to cool the tapping position. By setting the drainage mechanism 7, the waste water generated by tapping metal parts can be discharged, and at the same time, a large amount of suction can be generated during drainage, so that when the rotating panel 5 and the positioning unit 8 rotate to the drainage mechanism 7, the parts in the positioning unit 8 can be automatically discharged. By setting the positioning unit 8, when tapping the parts, the parts to be tapped can be positioned, so that the parts will not loosen during tapping, and at the same time, when the rotating panel 5 rotates to the position of the drainage mechanism 7, the positioned parts can be automatically discharged. By setting the tapping drill 10, it can contact the parts to complete the tapping work of the parts. By setting the drip water pipe 11, it can cool the generated high temperature during tapping.

[0031] A first stepping motor 3 is fixedly connected to the inner wall of the connecting cylinder 2. The output end of the first stepping motor 3 is installed with a rotating disk 4 through a coupling. The rotating disk 4 is fixedly connected to the inner ring of the rotating panel 5. By setting the first stepping motor 3, during operation, the rotating disk 4 can drive the rotating panel 5 to rotate.

[0032] The drainage mechanism 7 includes a drainage ring 71, the drainage ring 71 is fixedly connected to the inner wall of the support shell 6, a drain pipe 74 penetrates through the lower surface of the drainage ring 71, a limiting groove 72 is fixedly connected to the upper surface of the drainage ring 71, a ball 73 is rotatably connected to the inner cavity of the limiting groove 72, and the ball 73 is frictionally adapted to the lower surface of the rotating panel 5. By providing the drainage ring 71 and the drain pipe 74, the wastewater on the lower surface of the rotating panel 5 can be collected and discharged. By providing the limiting groove 72 and the ball 73, when the rotating panel 5 rotates, it can stably rotate on the upper surface of the drainage ring 71. A second support frame 77 is fixedly connected to the outer surface of the drainage ring 71, an air box 76 is fixedly connected to the end of the second support frame 77, a first connecting pipe 75 penetrates through one side of the air box 76 close to the drainage ring 71, and the end of the first connecting pipe 75 penetrates through the drainage ring 71. By providing the second support frame 77, the air box 76 can be connected to the outer surface of the drainage ring 71. By providing the first connecting pipe 75, the drainage ring 71 and the air box 76 can be communicated. Thus, when an air flow is generated inside the air box 76, the air flow enters the inner cavity of the drainage ring 71. A second connecting pipe 711 penetrates through the side of the air box 76 away from the first connecting pipe 75, a suction port 712 is fixedly connected to the top end of the second connecting pipe 711, and a first rubber ring 713 is fixedly connected to the outer surface of the suction port 712. By providing the second connecting pipe 711 and the suction port 712, when an air flow is generated inside the air box 76, an air flow flows out of the opening of the suction port 712. A third support frame 78 is fixedly connected to the inner wall of the air box 76, a second stepping motor 79 is fixedly connected to the end of the third support frame 78, and a fan blade 710 is installed at the output end of the second stepping motor 79 through a coupling. By providing the second stepping motor 79, after the power supply is connected and the switch is turned on, the fan blade 710 can rotate, thus generating an air flow in the inner cavity of the air box 76, enabling the outside air to enter the inner cavity of the air box 76 through the suction port 712 and finally discharging from the drainage ring 71.

[0033] The positioning unit 8 includes a connecting base plate 81, a positioning mechanism 82, and a discharging mechanism 83. The connecting base plate 81 is fixedly connected to the upper surface of the rotating panel 5. The upper surface of the rotating panel 5 is penetrated by a one-way valve 12. The one-way valve 12 is located inside the cavity of the connecting base plate 81. The positioning mechanism 82 includes a placement box 821. The placement box 821 is fixedly connected to the upper surface of the connecting base plate 81. By providing the one-way valve 12, the water flow on the upper surface of the rotating panel 5 can enter the inner cavity of the drainage ring 71, while the air in the inner cavity of the drainage ring 71 will not enter the upper surface space of the rotating panel 5 through the one-way valve 12. By providing the placement box 821, the parts to be tapped can be placed. A placement frame 822 is fixedly connected to the inner wall of the placement box 821. A clamping plate 823 is fixedly connected to the bottom surface of the inner cavity of the placement frame 822. A positioning plate 824 is fixedly connected to the bottom surface of the inner cavity of the placement frame 822. A positioning hole 825 is formed in the bottom surface of the inner cavity of the placement frame 822. A rotating rod 826 is rotatably connected to the inner cavity of the placement frame 822. A fourth support frame 827 is fixedly connected to the outer surface of the rotating rod 826. A clamping plate 828 is fixedly connected to the top end of the fourth support frame 827. By providing the clamping plate 823 and the positioning plate 824, the parts placed in the inner cavity of the placement frame 822 can be limited, so that the position where the parts need to be drilled is aligned with the positioning hole 825. By providing the clamping plate 828, the parts after being placed can be held. A gear 829 is fixedly connected to the end of the rotating rod 826. An extrusion plate 8210 is fixedly connected to the upper surface of the end of the rotating rod 826. An arc-shaped rod 8211 is fixedly connected to the outer surface of the extrusion plate 8210. A spring 8213 is sleeved on the outer surface of the arc-shaped rod 8211. A limiting ring 8212 is sleeved on the outer surface of the arc-shaped rod 8211. The limiting ring 8212 is fixedly connected to the outer side surface of the placement box 821. The discharging mechanism 83 includes a fifth support frame 831. The fifth support frame 831 is fixedly connected to the outer surface of the placement box 821. A limiting tube 832 is fixedly connected to the end of the fifth support frame 831. A sliding rod 836 is slidably connected to the inner cavity of the limiting tube 832. A tooth plate 837 is fixedly connected to the end of the sliding rod 836. The tooth plate 837 is engaged with the gear 829. A sliding block 838 is fixedly connected to the end of the tooth plate 837. A track groove 839 is sleeved on the outer surface of the sliding block 838. The track groove 839 is fixedly connected to the outer side surface of the placement box 821. By providing the extrusion plate 8210, under the action of the spring 8213 and the limiting ring 8212, the rotating rod 826 is always subjected to a squeezing force, so that the rotating rod 826 drives the clamping plate 828 to clamp and squeeze the parts. By providing the limiting tube 832, the sliding rod 836 can be limited, so that the sliding rod 836 moves horizontally in the inner cavity of the limiting tube 832, and then the tooth plate 837 moves forward, and then the gear 829 rotates, and finally the clamping plate 828 no longer squeezes the parts, and finally the parts can be automatically discharged. By providing the sliding block 838 and the track groove 839,It can enable the stable lateral movement of the toothed plate 837. The end of the limit tube 832 is fixedly connected to the third connecting tube 833. The end of the third connecting tube 833 is fixedly connected to the transfer box 834. The outer surface of the transfer box 834 is fixedly connected to the second rubber ring 835. The second rubber ring 835 is in extrusion fit with the first rubber ring 713. By providing the transfer box 834 and the second rubber ring 835, when it rotates to align with the first rubber ring 713, the first rubber ring 713 can be in close contact with the second rubber ring 835, and finally the air flow enters the inner cavity of the transfer box 834.,

[0034] Working principle: During use, the operator places the part to be tapped in the inner cavity of the placement frame 822, and makes the positioning plate 824 and the clamping plate 823 tightly connected to the part. Then the operator controls the first stepping motor 3 to access the power supply and turn on the switch, so that the rotating disk 4 drives the rotating panel 5 to rotate, and then the part is located directly below the tapping drill 10. At this time, the tapping drill 10 taps the part. At the same time, water will drip from the bottom of the drip water pipe 11 to the tapping position. At the same time, the operator connects the second stepping motor 79 to the power supply and turns on the switch, so that suction is generated in the inner cavity of the drainage ring 71, so that the cooling sewage enters the inner cavity of the drainage ring 71 and finally discharges from the drainage pipe 74. When the second rubber ring 835 in the positioning unit 8 where the tapped part is located comes into contact with the first rubber ring 713, the air flow enters the inner cavity of the transfer box 834, causing the sliding rod 836 to move laterally in the inner cavity of the limit tube 832, and then the toothed plate 837 moves forward, and then the gear 829 rotates, and finally the clamping plate 828 no longer presses the part, and finally the part can be automatically discharged.,

[0035] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special explanation and limitation.,

Claims

1. A multi-station tapping machine, comprising a base (1), wherein the upper surface of the base (1) is fixedly connected with a connecting cylinder (2), and the upper surface of the connecting cylinder (2) is fixedly connected with a support shell (6), and is characterized in that: A drainage mechanism (7) is fixedly connected to the outer surface of the support shell (6). This drainage mechanism (7) is used to discharge the wastewater generated by tapping cooling. A rotating panel (5) is rotatably connected to the upper surface of the drainage mechanism (7). A positioning unit (8) is arranged on the upper surface of the rotating panel (5). This positioning unit (8) is used to position and clamp the parts to be tapped. A first support frame (9) is fixedly connected to the upper surface of the base (1). A tapping drill (10) is fixedly connected to the end of the first support frame (9). A drip water pipe (11) penetrates through the upper surface of the first support frame (9), and this drip water pipe (11) extends directly above the positioning unit (8).

2. The multi-station tapping machine according to claim 1, wherein: A first stepping motor (3) is fixedly connected to the inner wall of the connecting cylinder (2). The output end of the first stepping motor (3) is installed with a rotating disk (4) through a coupling. The rotating disk (4) is fixedly connected to the inner ring of the rotating panel (5).

3. A multi-station tapping machine according to claim 1, characterized in that: The drainage mechanism (7) includes a drainage ring (71). The drainage ring (71) is fixedly connected to the inner wall of the support shell (6). A drain pipe (74) penetrates through the lower surface of the drainage ring (71). A limiting groove (72) is fixedly connected to the upper surface of the drainage ring (71). A ball (73) is rotatably connected to the inner cavity of the limiting groove (72). The ball (73) is frictionally adapted to the lower surface of the rotating panel (5).

4. A multi-station tapping machine according to claim 3, characterized in that: A second support frame (77) is fixedly connected to the outer surface of the drainage ring (71). An air box (76) is fixedly connected to the end of the second support frame (77). A first connecting pipe (75) penetrates through one side of the air box (76) close to the drainage ring (71). The end of the first connecting pipe (75) penetrates through the drainage ring (71).

5. The multi-station tapping machine according to claim 4, characterized in that: A second connecting pipe (711) penetrates through the side of the air box (76) away from the first connecting pipe (75). The top of the second connecting pipe (711) is fixedly connected to an air suction port (712). A first rubber ring (713) is fixedly connected to the outer surface of the air suction port (712).

6. The multi-station tapping machine according to claim 5, characterized in that: A third support frame (78) is fixedly connected to the inner wall of the air box (76). A second stepping motor (79) is fixedly connected to the end of the third support frame (78). The output end of the second stepping motor (79) is installed with a fan blade (710) through a coupling.

7. The multi-station tapping machine according to claim 6, wherein: The positioning unit (8) includes a connecting bottom plate (81), a positioning mechanism (82) and a discharging mechanism (83). The connecting bottom plate (81) is fixedly connected to the upper surface of the rotating panel (5). A one-way valve (12) penetrates through the upper surface of the rotating panel (5). The one-way valve (12) is located in the inner cavity of the connecting bottom plate (81). The positioning mechanism (82) includes a placement box (821). The placement box (821) is fixedly connected to the upper surface of the connecting bottom plate (81).

8. A multi-station tapping machine according to claim 7, characterized in that: At the inner wall of the placement box (821), a placement frame (822) is fixedly connected. At the bottom surface of the inner cavity of the placement frame (822), a clamping plate (823) is fixedly connected. At the bottom surface of the inner cavity of the placement frame (822), a positioning plate (824) is fixedly connected. At the bottom surface of the inner cavity of the placement frame (822), a positioning hole (825) is formed. In the inner cavity of the placement frame (822), a rotating rod (826) is rotatably connected. On the outer surface of the rotating rod (826), a fourth support frame (827) is fixedly connected. At the top end of the fourth support frame (827), a clamping plate (828) is fixedly connected.

9. The multi-station tapping machine according to claim 8, wherein: At the end of the rotating rod (826), a gear (829) is fixedly connected. At the upper surface of the end of the rotating rod (826), a pressing plate (8210) is fixedly connected. On the outer surface of the pressing plate (8210), an arc-shaped rod (8211) is fixedly connected. On the outer surface of the arc-shaped rod (8211), a spring (8213) is sleeved. On the outer surface of the arc-shaped rod (8211), a limiting ring (8212) is sleeved. The limiting ring (8212) is fixedly connected to the outer side surface of the placement box (821). The discharging mechanism (83) includes a fifth support frame (831). The fifth support frame (831) is fixedly connected to the outer surface of the placement box (821). At the end of the fifth support frame (831), a limiting tube (832) is fixedly connected. In the inner cavity of the limiting tube (832), a sliding rod (836) is slidably connected. At the end of the sliding rod (836), a toothed plate (837) is fixedly connected. The toothed plate (837) is meshed with the gear (829). At the end of the toothed plate (837), a sliding block (838) is fixedly connected. On the outer surface of the sliding block (838), a track groove (839) is sleeved. The track groove (839) is fixedly connected to the outer side surface of the placement box (821).

10. A multi-station tapping machine according to claim 9, characterized in that: At the end of the limiting tube (832), a third connecting tube (833) is fixedly connected. At the end of the third connecting tube (833), a transfer box (834) is fixedly connected. On the outer surface of the transfer box (834), a second rubber ring (835) is fixedly connected. The second rubber ring (835) is in extrusion fit with the first rubber ring (713).

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