A rotary tapping machine for pump covers

Abstract

This invention discloses a rotary tapping machine for pump covers, comprising: a positioning seat; a limiting platform mounted on the top of the positioning seat; a docking plate for mounting a transmission hydraulic cylinder at one end of the limiting platform; a tapping seat mounted on the output end of the transmission hydraulic cylinder; a pair of transmission shafts mounted on the top of the positioning seat; a transmission plate movably mounted on the top of the transmission shafts; and a rotating disk for limiting the pump cover rotatably mounted on the top of the transmission plate. The rotating disk has several grooves, and buffer end blocks and limiting end blocks are respectively provided inside the grooves. The buffer end blocks are used to abut against the bottom of the through hole. Compared with the prior art, the rotary disk design facilitates the rotation of the pump cover and the continuous processing of multiple workpieces. The height-adjustable telescopic shaft can accurately set the maximum feed depth of the drill chuck, i.e., the lower limit of the tapping depth, effectively preventing excessive tap feed from impacting the buffer end blocks and causing wear or damage, thus improving overall processing efficiency and enhancing operational safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pump cover processing, in particular to a turnover tapping machine for pump cover. BACKGROUND

[0002] The pump cover is one of the key parts of fluid machinery (such as pump), which is usually installed on the side or end of the pump body, and plays a role in sealing the pump cavity, supporting the bearing or shaft, providing installation interface (such as inlet and outlet flange), etc. The processing quality directly affects the sealing performance, running accuracy and service life of the pump.

[0003] During the machining process of the pump cover, the tapping of the pump cover is a key process of machining internal threads in the pre-drilled holes of the pump cover, which is used for installing bolts, studs, pipe joints or other threaded connecting parts. When using a machine tool for tapping, it is necessary to ensure that the workpiece and the spindle are perpendicular. However, when using a machine tool to process through holes, the tapping position may deviate, which may cause excessive wear of the tap and even breakage of the tap. In addition, under the condition of tapping position deviation, the internal thread may also be skewed, which may affect the subsequent bolt assembly. In addition, sufficient cooling liquid is needed to continuously flush and remove chips and to cool during the tapping process. Therefore, we propose a turnover tapping machine for pump cover to solve the above problems. SUMMARY

[0004] The present application aims to provide a turnover tapping machine for pump cover to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a turnover tapping machine for pump cover, comprising,

[0006] A positioning seat is provided with a limiting table at the top, one end of the limiting table is provided with a butt joint plate for installing a transmission hydraulic cylinder, a tapping seat is installed on the output end of the transmission hydraulic cylinder, a pair of transmission shafts are installed on the top of the positioning seat, a transmission plate is movably arranged at the top end of the transmission shaft, and a rotary disc for limiting the pump cover is rotatably arranged at the top end of the transmission plate.

[0007] The rotary disk has several grooves, and each groove has a buffer block and a limiting block. The buffer block is used to press against the bottom of the through hole for filtering and separating coolant and metal shavings. The limiting block is movably disposed inside the groove and has a support plate at one end. A transmission slider is movably disposed on the support plate. A telescopic pressure plate is disposed on one side of the transmission slider, and a telescopic shaft connected to a guide ring is rotatably disposed at the top of the other side of the transmission slider for tapping position calibration. When tapping the through hole on the pump cover is required, the position of the through hole on the pump cover can be aligned with the position of the buffer block. As the limiting block feeds inward, the telescopic pressure plate is pressed against the top of the pump cover by the push rod motor for auxiliary clamping. At the same time, the position of the guide ring can be adjusted to make it concentric with the through hole, which facilitates subsequent calibration with the drill chuck and reduces the possibility of tapping deviation.

[0008] Preferably, a snap-fit ​​plate is installed on the top of the rotating disk, and a telescopic tube is provided at the top of the snap-fit ​​plate. The telescopic tube is hollow inside and has several fixing grooves on its side wall. A positioning frame in the shape of a cross is installed at the top of the telescopic tube.

[0009] The telescopic tube is equipped with several elastic compression shafts. The positioning frame has several straight slots. The compression shafts pass through the fixed slots and straight slots respectively. The top of the compression shaft is connected to a docking ring. A snap-fit ​​collar can be fitted on the outside of the docking ring, corresponding to the positioning hole on the pump cover. By precisely snapping the piston hole of the pump cover with the docking ring and reinforcing it with the snap-fit ​​collar, combined with the bottom of the positioning through hole of the buffer end block and the top of the telescopic pressure plate pressing, the pump cover is quickly and accurately positioned and centered in three dimensions. This ensures that the height of the through hole axis is consistent with the subsequent tapping axis, significantly reduces the risk of tapping deviation, and improves the thread processing accuracy and hole position consistency.

[0010] Preferably, the buffer end block has a rectangular groove inside, and a filter plate is installed inside the rectangular groove. The filter plate is positioned below the inner wall of the rectangular groove. The filter plate has elastic pads at both ends to help it be installed inside the rectangular groove. The top of the buffer end block has a rectangular rubber pad. After the coolant carries metal shavings through the through hole, it is first filtered and separated by the filter plate inside the buffer end block. Most of the metal shavings are trapped in the rectangular groove.

[0011] Preferably, the buffer end block is provided with a blocking frame, the blocking frame is clamped on the top of the transmission plate, a plurality of transmission pipes are arranged on the outer wall of the blocking frame, the transmission pipes are inserted into the buffer end block for conducting cooling liquid, a hollow filter plate is arranged in the blocking frame, a plurality of metal grid plates are arranged in the hollow filter plate, a connecting pipe penetrating through the blocking frame is arranged on the outer side of the hollow filter plate, the connecting pipe is connected with an external suction device, the cooling liquid is collected through the transmission pipes of the blocking frame, and then is subjected to secondary fine filtration through the hollow filter plate. The external suction device discharges the filtered cooling liquid through the connecting pipe for recycling.

[0012] Preferably, the limiting end block is provided with a clamping frame arranged on the top of the limiting end block, one end of the clamping frame is connected with the supporting vertical plate, and a push rod motor is arranged in the clamping frame and arranged on the bottom of the transmission sliding block.

[0013] The bottom of the telescopic pressing plate is provided with an annular rubber pad, and a plurality of anti-skid grooves are arranged on the bottom of the annular rubber pad, the anti-skid grooves enhance the friction to prevent displacement, and the rubber material effectively avoids the surface indentation or deformation of the pump cover caused by rigid pressing, thereby ensuring the flatness and appearance quality of the pump cover, and the telescopic pressing plate is especially suitable for workpieces with high surface requirements.

[0014] Preferably, the telescopic shaft is rotatably arranged on the top of the transmission sliding block and has an adjustable height, the movable end of the telescopic shaft is arc-shaped and connected with a fixing ring, and a guide ring is rotatably arranged in the fixing ring, the guide ring is used for position calibration and butt joint with the tapping seat, and the telescopic shaft with an adjustable height can accurately set the maximum feeding depth of the drill chuck, thereby effectively preventing the tapping tap from impacting the buffer end block due to excessive feeding and causing wear or damage.

[0015] Preferably, a plurality of movable insertion rods are arranged on the bottom of the guide ring, and a connecting ring is arranged on the bottom of the movable insertion rod, a plurality of welded pipes are arranged on the bottom outer side of the connecting ring, a reset insertion rod is movably arranged in the welded pipe, a frosted ring is arranged on the outer wall of the reset insertion rod, a conducting ring is rotatably arranged on the outer wall of the fixing ring, a plurality of semicircular convex transmission end blocks are arranged on the bottom of the conducting ring, the top end of the reset insertion rod can abut against the transmission end block, and the reset insertion rod is used for pushing. Before tapping, the movable insertion rod is used for preliminary positioning of the guide ring. Further rotating the guide ring drives the transmission end block to push the frosted ring at the bottom of the reset insertion rod outward to form a tripod shape, and the reset insertion rod is inserted into the top end of the through hole for accurate positioning and concentric calibration. This process not only ensures that the tapping tap at the bottom of the drill chuck is accurately centered with the through hole, reduces the lateral stress of the tapping tap, but also enables the frosted ring to automatically chamfer the hole during the rotating calibration process, thereby eliminating the burr and jamming risk of the tapping inlet.

[0016] Preferably, the tapped seat bottom is provided with a rotating shaft, and the bottom of the rotating shaft is provided with a drill chuck for taper tap clamping, and a plurality of calibration plates can be installed outside the drill chuck and abut against the guide ring to keep the drill chuck and the bottom through hole in a concentric state.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The present application realizes the rapid and accurate positioning and centering of the pump cover in three dimensions by accurately clamping the pump cover piston hole and the butt joint ring, and reinforcing with the clamping sleeve, combining the bottom end of the buffer end block positioning through hole and the compression of the telescopic pressure plate top end, ensuring the high consistency of the through hole axis and the subsequent tapping axis, significantly reducing the risk of tapping deviation, and improving the thread processing precision and hole consistency.

[0019] 2. The present application effectively separates the cutting waste by preliminary filtering and separating the metal chips in the rectangular groove with the filter plate in the buffer end block after the cooling liquid carrying the metal chips passes through the through hole, and the cooling liquid is collected through the transmission pipe of the blocking frame and then subjected to secondary fine filtering through the hollow filter plate, and the filtered cooling liquid is discharged through the connecting pipe by the external suction equipment for recycling, which effectively separates the cutting waste, greatly reduces the cooling liquid consumption and waste liquid treatment cost, and maintains the cleanliness of the machining area.

[0020] 3. The present application preliminarily positions the guide ring by the movable insertion rod before tapping, further rotates the guide ring to drive the transmission end block, pushes the frosted ring at the bottom of the reset insertion rod to extend outward in the form of a tripod, and inserts into the top end of the through hole for accurate positioning and concentric calibration, which not only ensures the accurate centering of the tap at the bottom of the drill chuck and the through hole, reduces the lateral stress of the tap, but also automatically chamfers the hole during the rotation and calibration process, eliminating the risk of burr and jam at the inlet of subsequent tapping.

[0021] 4. When the limiting end block drives the telescopic pressure plate to compress the pump cover, the annular rubber pad at the bottom of the telescopic pressure plate and the rubber pad plate at the top of the buffer end block jointly form a flexible clamping contact surface. The anti-skid groove enhances the friction to prevent displacement, and the rubber material effectively avoids the surface indentation or deformation of the pump cover caused by rigid compression, ensuring the flatness and appearance quality of the pump cover, especially suitable for workpieces with high surface requirements.

[0022] 5. The present application realizes the rotation and continuous machining of multiple workpieces by the design of the rotating disc, and the telescopic shaft with adjustable height can accurately set the maximum feed depth of the drill chuck, i.e. the lower limit of the tapping depth of the tap, effectively preventing the tap from impacting and damaging the buffer end block due to excessive feed, improving the overall machining efficiency and safety during operation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic diagram of the present application.

[0024] Figure 2 This is a partial structural diagram of the limiting platform of the present invention;

[0025] Figure 3 This is a schematic diagram of the top structure of the transmission plate of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of a portion of point A in the middle;

[0027] Figure 5 This is a schematic diagram of the top structure of the rotating disk of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of a portion of point B in the middle;

[0029] Figure 7 This is a schematic diagram of the limiting end block structure of the present invention;

[0030] Figure 8 This is a schematic diagram of a partial structure of the telescopic shaft of the present invention;

[0031] In the diagram: 1. Positioning seat; 2. Limiting platform; 3. Transmission plate; 4. Buffer end block; 5. Limiting end block; 21. Transmission hydraulic cylinder; 22. Docking plate; 23. Tapping seat; 24. Drill chuck; 31. Rotary disk; 32. Clamping plate; 33. Telescopic tube; 331. Compression shaft; 34. Positioning frame; 35. Docking ring; 41. Blocking frame; 42. Hollow filter plate; 43. Filter plate; 431. Elastic pad; 51. Clamping frame; 52. Support vertical plate; 53. Transmission slider; 531. Telescopic pressure plate; 54. Telescopic shaft; 55. Guide ring; 56. Conducting ring; 561. Transmission end block; 57. Connecting ring; 58. Welded tube; 581. Reset insert rod. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-8 This invention provides a technical solution: a rotary tapping machine for pump covers, comprising,

[0034] Positioning seat 1, with a limiting platform 2 installed on the top of positioning seat 1. One end of the limiting platform 2 is provided with a docking plate 22 for installing a transmission hydraulic cylinder 21. A tapping seat 23 is installed on the output end of the transmission hydraulic cylinder 21. A pair of transmission shafts are installed on the top of positioning seat 1, and a transmission plate 3 is movably provided at the top of the transmission shafts. A rotating disk 31 for limiting the pump cover is rotatably provided at the top of the transmission plate 3.

[0035] The rotary disk 31 has several grooves, and each groove has a buffer block 4 and a limiting block 5. The buffer block 4 is used to press against the bottom of the through hole for filtering and separating coolant and metal chips. The limiting block 5 is movably installed inside the groove and has a support vertical plate 52 at one end. A transmission slider 53 is movably installed on the support vertical plate 52. A telescopic pressure plate 531 is installed on one side of the transmission slider 53. A telescopic shaft 54 ​​connected to the guide ring 55 is rotatably installed on the top of the other side of the transmission slider 53 for tapping position calibration. When tapping the through hole on the pump cover is required, the position of the through hole on the pump cover can be aligned with the position of the buffer block 4. As the limiting block 5 feeds inward, the telescopic pressure plate 531 is pressed against the top of the pump cover by the push rod motor for auxiliary clamping. At the same time, the position of the guide ring 55 can be adjusted so that it is concentric with the through hole, which is convenient for subsequent calibration with the drill chuck 24 and reduces the possibility of tapping deviation.

[0036] like Figure 5 and Figure 6 As shown, in order to reduce the low positioning efficiency of the pump cover, a snap-fit ​​plate 32 is installed on the top of the rotating disk 31. A telescopic tube 33 is provided at the top of the snap-fit ​​plate 32. The telescopic tube 33 is hollow inside and has several fixing grooves on its side wall. A positioning frame 34 in the shape of a cross is installed at the top of the telescopic tube 33.

[0037] The telescopic tube 33 has several elastic compression shafts 331 installed inside. The positioning frame 34 has several straight slots. The compression shafts 331 pass through the fixing slots and the straight slots respectively. The top of the compression shaft 331 is connected to a docking ring 35. A snap-fit ​​collar can be fitted on the outside of the docking ring 35, which corresponds to the positioning hole on the pump cover. Before clamping the pump cover, the piston hole of the pump cover can be aligned with the position of the docking ring 35 to assist in centering. With the help of the snap-fit ​​collar, it can be locked inside the piston hole to further ensure the positioning accuracy and reduce the accidental situation of local clamping instability caused by deviation during the centering process.

[0038] like Figure 3 and Figure 4As shown, in order to improve the separation efficiency of metal scraps and coolant, a rectangular groove is formed in the buffer block 4, and a filter plate 43 is clamped in the rectangular groove, the position of the filter plate 43 is lower than the inner wall of the rectangular groove, and the both ends of the filter plate 43 are provided with elastic pads 431 for clamping in the rectangular groove. The top of the buffer block 4 is provided with a rectangular rubber pad. The filter plate 43 can separate the coolant, most of the metal scraps are accumulated in the rectangular groove, and the function of interception is achieved.

[0039] As shown in Figure 3 and Figure 4 The buffer block 4 is provided with a blocking frame 41 clamped on the top of the transmission plate 3, a plurality of transmission pipes are arranged on the outer wall of the blocking frame 41, and the transmission pipes are inserted into the buffer block 4 for conducting coolant. The hollow filter plate 42 is installed in the blocking frame 41, the hollow filter plate 42 is provided with a plurality of metal grid plates, the hollow filter plate 42 is provided with a connecting pipe penetrating the blocking frame 41, and the connecting pipe is connected with an external suction device. When the coolant enters the hollow filter plate 42 through the through hole, the metal scraps and the coolant can be separated through the filter plate 43. The external suction device is connected with the connecting pipe through the rubber pipe, the coolant can be filtered and separated through the hollow filter plate 42, and the coolant can be discharged for recycling. Compared with the traditional overflow of coolant, the subsequent cleaning work intensity can be reduced.

[0040] As shown in Figure 7 and Figure 8 The top of the limiting end block 5 is provided with a clamping frame 51, one end of the clamping frame 51 is connected with a supporting vertical plate 52, a push rod motor is arranged in the clamping frame 51, and the output end of the push rod motor is arranged on the bottom of the transmission sliding block 53.

[0041] The bottom of the telescopic pressing plate 531 is provided with an annular rubber pad, and the bottom of the annular rubber pad is provided with a plurality of anti-skid grooves. Under the action of the push rod motor, the transmission sliding block 53 can be driven to move, the telescopic pressing plate 531 can be abutted against the top end of the pump cover, and the annular rubber pad and the rectangular rubber pad can be matched to reduce the flatness of the pump cover caused by indentation in the clamping process.

[0042] As shown in Figure 8 The telescopic shaft 54 is rotatably arranged on the top of the transmission sliding block 53 and the height thereof is adjustable, the movable end of the telescopic shaft 54 is arc-shaped and connected with a fixing ring, and the fixing ring is rotatably arranged with a guide ring 55. The guide ring 55 is used for position calibration and butt joint with the tapping seat 23. In the tapping process, the height of the telescopic shaft 54 can be adjusted to limit the feeding distance of the drill chuck 24 and reduce the wear of the contact between the bottom end and the buffer block 4 in the tapping process.

[0043] As shown in Figure 8As shown, the bottom of the guide ring 55 is provided with a plurality of movable insertion rods, and the bottom of the movable insertion rod is provided with a connecting ring 57, and the bottom of the connecting ring 57 is provided with a plurality of welded pipes 58, and the inside of the welded pipe 58 is movably provided with a reset insertion rod 581, and the outer wall of the reset insertion rod 581 is provided with a frosted ring, and the outer wall of the fixed ring is rotatably provided with a transmission ring 56, and the bottom of the transmission ring 56 is provided with a plurality of semicircular convex transmission end blocks 561, and the top end of the reset insertion rod 581 can abut against the transmission end block 561, for pushing the reset insertion rod 581 to move, and the transmission ring 56 is located at the top end of the through hole, and at this time the guide ring 55 rotates, so that the convex part of the transmission end block 561 abuts against the top end of the reset insertion rod 581, so that the bottom of the reset insertion rod 581 forms a tripod shape, which can be inserted into the top end of the through hole, and can play a role in positioning and correcting, so that the top end of the transmission ring 56 and the through hole are in a concentric state, reducing the stress on the tap during the tapping process due to inaccurate position, which can cause wear and even breakage. Accidental situation, and during the correction process, when the reset insertion rod 581 at the bottom is in the state of the tripod, the guide ring 55 and the external transmission ring 56 rotate at the same time, so that the frosted ring on the surface of the reset insertion rod 581 chamfers the top end of the through hole, reducing the possibility of jamming and increasing wear during subsequent tap feeding.

[0044] As shown in the figure, Figure 2 The bottom of the tapping seat 23 is provided with a rotating shaft, and the bottom of the rotating shaft is provided with a drill chuck 24, and the drill chuck 24 is used for tap clamping, and a plurality of calibration plates abutting against the guide ring 55 can be installed outside the drill chuck 24, which can clamp the calibration plate outside the fixed ring, and the drill chuck 24 and the through hole at the bottom are in a concentric state.

[0045] Working principle: first, when the through hole of the pump cover needs to be tapped, the position of the through hole of the pump cover corresponds to the position of the buffer block 4, and as the limiting block 5 feeds inward, the telescopic pressing plate 531 is abutted against the top end of the pump cover by the push rod motor, which is used to assist in pressing, and the position of the guide ring 55 can be adjusted to make it concentric with the through hole, which is convenient for subsequent calibration with the drill chuck 24 and reduces the possibility of tapping deviation, and during positioning, the pump cover can be placed on the rotating disc 31, and the position of the through hole can correspond to the position of the buffer block 4, and during positioning and clamping, the piston hole at the top end of the pump cover can correspond to the position of the butt joint ring 35, which can play a role in assisting the centering during clamping, and during clamping, as the limiting block 5 feeds, the telescopic pressing plate 531 on one side of the transmission sliding block 53 can be abutted against the top end of the pump cover by the push rod motor, which is used for positioning and pressing to ensure the stability of subsequent processing.

[0046] Then adjust the height and angle of telescopic shaft 54, can make the conductive ring 56 in the top of the hole, and at this time the guide ring 55 rotates, can make the transmission end block 561 convex part against the reset plug 581 top, can make the reset plug 581 bottom into a tripod shape, can be inserted in the top of the hole, can play the role of positioning correction, can make the top of the conductive ring 56 and the hole appear concentric state, reduce the stress due to the position of the tap during the process of not accurate to enhance the wear even to the unexpected situation of breakage, and in the correction process, can make the bottom of the reset plug 581 in the state of the tripod, the guide ring 55 and the external conductive ring 56 rotate at the same time, can make the surface of the reset plug 581 sand ring chamfering processing of the top of the hole, reduce the subsequent tap feeding process appears to increase the wear and tear of the situation;

[0047] Finally in the process of tapping, the height of telescopic shaft 54 can be adjusted, can limit the feeding distance of drill chuck 24, reduce the wear and tear in the process of tapping between the bottom and the buffer block 4 contact, and in the process of feeding, along with the cooling liquid into the hole, can separate the metal chips and cooling liquid along the filter plate 43, and the external suction device through the rubber tube and the connecting pipe sleeve joint, can make the cooling liquid through the hollow filter plate 42 filtering separation, cooling liquid export recycling.

[0048] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tumbler tapping machine for pump covers, characterized in that: Include, The positioning seat (1) top is equipped with the limiting table (2), one end of the limiting table (2) is equipped with the butt joint plate (22) of installing transmission hydraulic cylinder (21), the output end of transmission hydraulic cylinder (21) is equipped with the tapping seat (23), the positioning seat (1) top is equipped with a pair of transmission shaft, and the top of transmission shaft is movably equipped with transmission plate (3), the top of transmission plate (3) is rotatably equipped with the rotary disc (31) for pump cover limiting; Wherein, the rotary disc (31) is respectively provided with a plurality of sliding grooves, and the sliding groove is respectively provided with a buffer end block (4) and a limiting end block (5), the buffer end block (4) is used for abutting against the bottom of the through hole position, for cooling liquid and metal chip filtering separation, the limiting end block (5) is movably arranged in the sliding groove and one end is provided with a supporting vertical plate (52), the supporting vertical plate (52) is movably provided with a transmission sliding block (53), one side of the transmission sliding block (53) is provided with a telescopic pressing plate (531), the other side of the transmission sliding block (53) is rotatably provided with a telescopic shaft (54) connected with a guide ring (55), for tapping position calibration; The rotary disc (31) top is equipped with the clamping plate (32), the clamping plate (32) top is equipped with the telescopic pipe (33), the telescopic pipe (33) is hollow inside and a plurality of fixed grooves are formed in the side wall, the telescopic pipe (33) top is equipped with the positioning frame (34) in the shape of "ten" cross; The telescopic pipe (33) is internally provided with a plurality of elastic compression shafts (331), a plurality of straight grooves are formed in the positioning frame (34), the compression shafts (331) respectively pass through the fixed grooves and the straight grooves, the compression shafts (331) are connected with the butt joint ring (35) at the top, the butt joint ring (35) is externally sleeved with a clamping sleeve ring, corresponding to the positioning hole on the pump cover; The telescopic shaft (54) is rotatably arranged on the top of the transmission sliding block (53) and the height is adjustable, the movable end of the telescopic shaft (54) is arc-shaped and connected with a fixing ring, and the fixing ring is rotatably arranged with a guide ring (55) inside, the guide ring (55) is used for position calibration and butt joint with the tapping seat (23); The guide ring (55) bottom is equipped with a plurality of movable insertion rods, and the movable insertion rod bottom is equipped with a connecting ring (57), the connecting ring (57) bottom outside is equipped with a plurality of welded pipes (58), the welded pipe (58) is movably inserted with a reset insertion rod (581) inside, the reset insertion rod (581) is provided with a frosted ring on the outer wall, and a transmission ring (56) is rotatably arranged on the outer wall of the fixed ring, the transmission ring (56) bottom is provided with a plurality of transmission end blocks (561) in the shape of semicircle protrusion, the top of the reset insertion rod (581) can abut against the transmission end block (561), for pushing the reset insertion rod (581) to move.

2. The turn-around tapping machine for pump covers according to claim 1, characterized in that: The buffer end block (4) is internally provided with a rectangular groove, and the filter plate (43) is clamped in the rectangular groove, the filter plate (43) is lower than the inner wall of the rectangular groove, the filter plate (43) is provided with elastic pad (431) at both ends, for auxiliary clamping in the rectangular groove, the buffer end block (4) top is provided with a rubber pad in the shape of rectangle.

3. The turn-around tapping machine for pump covers according to claim 1, characterized in that: The buffer end block (4) is provided with a blocking frame (41) which is clamped on the top of the transmission plate (3), the outer wall of the blocking frame (41) is provided with a plurality of transmission pipes which are inserted into the buffer end block (4) for conducting cooling liquid, the hollow filter plate (42) is installed inside the blocking frame (41), the hollow filter plate (42) is provided with a plurality of metal grid plates inside, the hollow filter plate (42) is provided with a connecting pipe which penetrates through the blocking frame (41) outside, and the connecting pipe is connected with an external suction device.

4. The turn-around tapping machine for pump covers of claim 1 wherein: The limiting end block (5) is provided with a clamping frame (51) on the top, one end of the clamping frame (51) is connected with a supporting vertical plate (52), a push rod motor is arranged inside the clamping frame (51), and the output end of the push rod motor is installed on the bottom of a transmission sliding block (53); The telescopic pressing plate (531) is provided with an annular rubber pad on the bottom, and a plurality of anti-skid grooves are arranged on the bottom of the annular rubber pad.

5. The turn-around tapping machine for pump covers of claim 1 wherein: The tapping seat (23) is provided with a rotating shaft on the bottom, and a drill chuck (24) is installed on the bottom of the rotating shaft, the drill chuck (24) is used for clamping a tap, and a plurality of alignment plates are installed outside the drill chuck (24) and abut against the guide ring (55).

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