Automatic machining device for forming pressure-resistant U-shaped bolt

Abstract

The invention discloses an automatic machining device for forming a pressure-resistant U-shaped bolt, and belongs to the field of bolt machining. Comprising a top plate, two nut cylinders are installed on the left side of the upper surface of the top plate in an embedded mode, two tightening cylinders are rotationally connected to the left side of the lower surface of the top plate through rotating shafts, gear rings are fixedly connected to the outer side walls of the tightening cylinders, and an L-shaped mounting frame is fixedly connected to the position, located on the right sides of the two tightening cylinders, of the lower surface of the top plate; a motor is fixedly connected to the lower portion of the inner side wall of the L-shaped mounting frame. A motor is started, under transmission of a transmission wheel and a transmission belt, two first gears are controlled to rotate, so that a tightening barrel with the outer side wall sleeved with a gear ring is driven to rotate, and nuts entering the tightening barrel are conveniently driven to rotate; and the rotating tightening cylinder is conveniently matched to drive the nuts to rotate to the two ends of the U-shaped screw rod, so that the assembly machining operation is completed.

Description

Technical Field

[0001] The invention relates to the field of bolt processing, and in particular to an automatic processing device for forming pressure-resistant U-shaped bolts. Background Art

[0002] Bolts are mechanical parts, cylindrical threaded fasteners that are matched with nuts. A type of fastener consisting of a head and a screw, which must be matched with a nut to fasten two parts with through holes. U-bolts are also called U-bolts because they are U-shaped. They have threads at both ends that can be combined with nuts. They are mainly used to fix tubular objects such as water pipes or sheet objects such as car leaf springs.

[0003] Patent: CN112122915A discloses a bolt processing device, including an upper body of the processing device, a hydraulic rod and a sleeve are installed on the lower outer surface of the upper body of the processing device, the hydraulic rod is located on both sides of the sleeve, the lower outer surface of the hydraulic rod is connected to the lower body of the processing device, an air pump and a fixed groove are installed inside the lower body of the processing device, the air pump is located at the lower end of the fixed groove, a push rod is installed on the upper outer surface of the air pump, and a bolt is connected to the upper inner surface of the fixed groove. The bolt processing device described in the device is convenient for people to place the nut in the groove, and drive the sleeve to rotate through the brush drill. After the nut sleeve is connected to the nut by contraction through the hydraulic rod, it starts to automatically combine and sleeve, bringing better use prospects;

[0004] In the above technology, it is not convenient to assemble the U-shaped bolts, and improvements are needed. For this purpose, we propose an automatic processing device for forming pressure-resistant U-shaped bolts. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a processing device that facilitates the assembly of U-bolts.

[0006] Technical solution: An automatic processing device for forming pressure-resistant U-shaped bolts, comprising a top plate, two nut cylinders are embedded and installed on the left side of the upper surface of the top plate, and two tightening cylinders are rotatably connected to the left side of the lower surface of the top plate through a rotating shaft, and the outer wall of the tightening cylinder is fixedly connected with a gear ring, and the lower surface of the top plate is located on the right side of the two tightening cylinders and is fixedly connected with an L-shaped mounting bracket, a motor is fixedly connected below the inner side wall of the L-shaped mounting bracket, and a bracket is fixedly connected to the right side of the inner side wall of the L-shaped mounting bracket, and the upper surface of the bracket is connected with a gear 1 through a rotating shaft, and the center of the lower surface of the gear 1 is located on the lower surface of the bracket and is fixedly connected There is a transmission wheel, and the outer side walls of the two transmission wheels are jointly connected with a transmission belt. The top end of the output shaft of the motor is fixedly connected to the center of the lower surface of the transmission wheel located in front of the lower surface of the bracket, and the two gears are respectively meshed with the outer side walls of the two gear rings; a vertical plate is arranged on the right side of the top plate, and the lower surface of the vertical plate is fixedly connected to a bottom plate, and two guide rods are fixedly connected to the right side of the upper surface of the bottom plate, and the top end of the guide rod passes through the top plate and is slidably connected to the top plate, and the left side of the vertical plate is fixedly connected to an electric telescopic rod, and the top end of the output end of the electric telescopic rod is fixedly connected to the lower surface of the top plate.

[0007] Furthermore, the upper surface of the bottom plate is symmetrically fixedly connected with support plates, and the top ends of the two support plates are commonly fixedly connected with a U-shaped placement frame.

[0008] Furthermore, an arc-shaped groove is formed on the inner lower surface of the U-shaped rack, and an arc-shaped strip is integrally formed on the inner upper surface of the U-shaped rack.

[0009] Furthermore, two through grooves are provided at the lower right side of the two nut tubes, and the interiors of the two through grooves located above and below the right side of the nut tubes are respectively slidably connected with a blocking plate 1 and a blocking plate 2, the right sides of the two blocking plates 1 are commonly fixedly connected with a cross bar 1, the right sides of the two blocking plates 2 are commonly fixedly connected with a cross bar 2, and the right sides of the cross bar 1 and the right sides of the cross bar 2 are respectively fixedly connected with a rack 1 and a rack 2.

[0010] Furthermore, the upper surface of the top plate is fixedly connected with mounting heads in front and behind the rack 2, and gear 2 is fixedly connected between the two mounting heads and between the rack 1 and the rack 2, and both the rack 1 and the rack 2 are meshed with the gear 2.

[0011] Furthermore, an air pressure box 1 is fixedly connected to the front left side of the vertical plate, a piston plate 1 is slidably connected inside the air pressure box 1, a push rod is fixedly connected to the upper surface of the piston plate 1, and the top end of the push rod passes through the top of the air pressure box 1 and is fixedly connected to the lower surface of the top plate.

[0012] Furthermore, a pressure box 2 is fixedly connected to the right side of the upper surface of the top plate, a ventilation pipe 1 is fixedly connected between the pressure box 2 and the pressure box 1, an end of the ventilation pipe 1 away from the pressure box 2 is located inside the pressure box 1 and a solenoid valve 1 is fixedly installed, a piston plate 2 is slidably connected inside the pressure box 2, and the left side of the piston plate 2 is fixedly connected to the right end of the rack 1.

[0013] Furthermore, the lower surface of the top plate is located on the right side of the L-shaped mounting frame and is fixedly connected to a transfer chamber, a ventilation pipe 2 is fixedly connected between the transfer chamber and the air pressure box 1, the ventilation pipe 2 is located inside the air pressure box 1 at one end away from the transfer chamber and is fixedly connected to an electromagnetic valve 2, the left side of the transfer chamber is fixedly connected to two ventilation pipes 3, the left end of the ventilation pipe 3 is located on the outer wall of the tightening cylinder and is fixedly connected to a sealing ring, a ventilation groove is integrally formed on the inner side of the sealing ring, a plurality of air cavities are opened inside the tightening cylinder, the air cavities are connected to the ventilation grooves, a piston plate is slidably connected inside the air cavity, a baffle is integrally formed on the outer wall of the piston plate, and the end of the baffle away from the piston plate passes through the inner side of the tightening cylinder.

[0014] Furthermore, a plurality of contraction cavities are provided on the lower surface of the tightening cylinder, a sliding plate is slidably connected to the interior of the contraction cavity, a spring is fixedly connected between the sliding plate and the contraction cavity, a conical anti-slip head is fixedly connected to the side of the sliding plate away from the spring, and one end of the conical anti-slip head away from the sliding plate passes through the inner side of the tightening cylinder.

[0015] Beneficial effects: Start the motor, and under the drive of the transmission wheel and the transmission belt, control the two gears to rotate, thereby driving the tightening cylinder with a gear ring on the outer wall to rotate, so as to facilitate the rotation of the nut entering the tightening cylinder. By controlling the electric telescopic rod to descend, the top plate is controlled to descend, so that the rotating tightening cylinder drives the nut to rotate to the two ends of the U-shaped screw to complete the assembly processing operation;

[0016] When in use, when the electric telescopic rod contracts and drives the top plate to descend, the solenoid valve 1 opens, and the gas inside the air pressure box 1 is filled into the air pressure box 2, and under the action of the gear 2, the barrier piece 1 moves toward the inside of the nut barrel, and the barrier piece 2 is pulled out from the inside of the nut barrel. At this time, the nut at the bottom of the nut barrel falls into the tightening barrel, and at the same time, the barrier piece 1 will prevent the other remaining nuts from descending, so as to achieve the effect of single nut unloading;

[0017] As the top plate continues to descend, the control solenoid valve 1 is closed and the solenoid valve 2 is opened. At this time, the gas inside the air pressure box 1 will be filled into multiple air cavities to block the top of the nut entering the tightening cylinder to prevent the nut from moving and affecting the assembly when the nut and bolt are spliced;

[0018] By setting up multiple elastically shrinkable conical anti-slip heads, the nut that falls into the tightening barrel can be limited to prevent the nut from falling out before it is spliced ​​to the bolt. When the nut is screwed to the end of the bolt and the assembly is completed, the top plate is controlled to rise. At this time, the conical anti-slip heads are squeezed and contracted, making it easier for the nut to detach. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the side view of the connection structure of the tightening cylinder, the gear ring, the motor, the L-shaped mounting frame, the bracket, the transmission wheel and the transmission belt of the present invention;

[0022] Figure 4 It is a partial cross-sectional connection structure schematic diagram of the barrier plate 1, barrier plate 2, air pressure box 1, air pressure box 2, transfer cavity and sealing ring of the present invention;

[0023] Figure 5 It is a side view structural schematic diagram of the nut barrel of the present invention;

[0024] Figure 6 is a schematic diagram of the top view of the cross section of the tightening cylinder of the present invention;

[0025] Figure 7 It is a bottom view structural schematic diagram of the nut thru of the present invention;

[0026] Figure 8 The present invention Figure 4 A is an enlarged structural diagram of FIG.

[0027] In the figure: 1, top plate; 2, nut cylinder; 3, tightening cylinder; 4, gear ring; 5, L-shaped mounting frame; 6, motor; 7, bracket; 8, gear 1; 9, transmission wheel; 10, transmission belt; 11, vertical plate; 12, bottom plate; 13, guide rod; 14, electric telescopic rod; 15, support plate; 16, U-shaped placement frame; 17, arc groove; 18, arc bar; 19, through groove; 20, blocker 1; 21, blocker 2; 22, cross bar 1; 23, cross bar 2; 24, rack 1; 25, Rack 2; 26. Mounting head; 27. Gear 2; 28. Air pressure box 1; 29. ​​Piston plate 1; 30. Push rod; 31. Air pressure box 2; 32. Ventilation pipe 1; 33. Solenoid valve 1; 34. Piston plate 2; 35. Transfer chamber; 36. Ventilation pipe 2; 37. Solenoid valve 2; 38. Ventilation pipe 3; 39. Sealing ring; 40. Ventilation groove; 41. Air cavity; 42. Piston plate; 43. Block plate; 44. Contraction cavity; 45. Sliding plate; 46. Spring; 47. Conical anti-slip head. DETAILED DESCRIPTION

[0028] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, an automatic processing device for forming pressure-resistant U-shaped bolts is provided, including a top plate 1, two nut cylinders 2 are embedded and installed on the left side of the upper surface of the top plate 1, two tightening cylinders 3 are rotatably connected to the left side of the lower surface of the top plate 1 through a rotating shaft, and the outer wall of the tightening cylinder 3 is fixedly connected with a gear ring 4, and the lower surface of the top plate 1 is located on the right side of the two tightening cylinders 3 and is fixedly connected with an L-shaped mounting frame 5, a motor 6 is fixedly connected below the inner side wall of the L-shaped mounting frame 5, and a bracket 7 is fixedly connected to the right side of the inner side wall of the L-shaped mounting frame 5, and a gear 1 8 is connected to the upper surface of the bracket 7 through a rotating shaft, and a transmission wheel 9 is fixedly connected to the lower surface of the bracket 7 at the center of the lower surface of the gear 1 8, and a transmission belt 10 is commonly connected to the outer side walls of the two transmission wheels 9, and the top end of the output shaft of the motor 6 is fixedly connected to the center of the lower surface of the transmission wheel 9 located in front of the lower surface of the bracket 7, and the two gears 1 8 are respectively meshed with the outer sides of the two gear rings 4.

[0031] When in use, multiple nuts are put into the two nut barrels 2 for pre-storage. When in use, the motor 6 is started, and the two gears 8 are controlled to rotate under the transmission of the transmission wheel 9 and the transmission belt 10, so as to drive the tightening barrel 3 with the gear ring 4 on the outer wall to rotate, so as to facilitate the rotation of the nuts entering the tightening barrel 3, so as to facilitate the screw connection and assembly of the nuts to the two ends of the U-shaped screw, and complete the assembly and processing operation;

[0032] A vertical plate 11 is provided on the right side of the top plate 1, a bottom plate 12 is fixedly connected to the lower surface of the vertical plate 11, two guide rods 13 are fixedly connected to the right side of the upper surface of the bottom plate 12, the top ends of the guide rods 13 pass through the top plate 1 and are slidably connected to the top plate 1, an electric telescopic rod 14 is fixedly connected to the left side of the vertical plate 11, and the top end of the output end of the electric telescopic rod 14 is fixedly connected to the lower surface of the top plate 1;

[0033] By controlling the electric telescopic rod 14 to descend, the top plate 1 is controlled to descend, so as to cooperate with the rotating tightening cylinder 3 to drive the nut to rotate to the two ends of the U-shaped screw;

[0034] The upper surface of the bottom plate 12 is symmetrically fixedly connected with a support plate 15, and the top ends of the two support plates 15 are commonly fixedly connected with a U-shaped placement frame 16;

[0035] The inner lower surface of the U-shaped placement rack 16 is provided with an arc-shaped groove 17, and the inner upper surface of the U-shaped placement rack 16 is integrally formed with an arc-shaped strip 18;

[0036] It is used to place U-bolts and facilitate the stable placement of U-bolts, thereby facilitating the subsequent threaded nut assembly.

[0037] like Figure 4 , Figure 5 and Figure 8 As shown, two through slots 19 are provided at the lower right sides of the two nut barrels 2, and a blocking piece 20 and a blocking piece 21 are slidably connected inside the two through slots 19 located at the upper right side and the lower right side of the nut barrel 2, respectively. A cross bar 1 22 is fixedly connected to the right sides of the two blocking pieces 20, and a cross bar 23 is fixedly connected to the right sides of the two blocking pieces 21, and a rack 1 24 and a rack 2 25 are fixedly connected to the right sides of the cross bar 1 22 and the right sides of the cross bar 23, respectively.

[0038] The upper surface of the top plate 1 is fixedly connected with mounting heads 26 in front and rear of the rack 25, and a gear 27 is fixedly connected between the two mounting heads 26 and between the rack 1 24 and the rack 2 25. The rack 1 24 and the rack 2 25 are meshed with the gear 2 27.

[0039] A pressure box 28 is fixedly connected to the front left side of the vertical plate 11, a piston plate 29 is slidably connected to the inside of the pressure box 28, a push rod 30 is fixedly connected to the upper surface of the piston plate 29, and the top end of the push rod 30 penetrates to the top of the pressure box 28 and is fixedly connected to the lower surface of the top plate 1;

[0040] A pressure box 2 31 is fixedly connected to the right side of the upper surface of the top plate 1, and a ventilation pipe 1 32 is fixedly connected between the pressure box 2 31 and the pressure box 1 28. An end of the ventilation pipe 1 32 away from the pressure box 2 31 is located inside the pressure box 1 28 and a solenoid valve 1 33 is fixedly installed. A piston plate 2 34 is slidably connected inside the pressure box 2 31, and the left side of the piston plate 2 34 is fixedly connected to the right end of the rack 1 24;

[0041] When in use, when the electric telescopic rod 14 contracts and drives the top plate 1 to descend, the solenoid valve 33 is opened first. At this time, the gas inside the air pressure box 28 will first be filled into the air pressure box 2 31, pushing the piston plate 2 34 to move to the left, so that under the action of the gear 2 27, the rack 24 moves to the left and the rack 25 moves to the right, so that the blocking piece 20 moves toward the inside of the nut tube 2, and the blocking piece 21 is pulled out from the inside of the nut tube 2, so that the nut at the bottom of the nut tube 2 loses its obstruction and falls into the tightening tube 3. At the same time, the blocking piece 20 will block the other remaining nuts from descending, so as to facilitate the effect of single nut unloading, thereby facilitating the single nuts inside the two nut tubes 2 to enter the two tightening tubes 3 respectively, so as to facilitate the effect of assembling the two nuts with the two ends of the U-shaped screw.

[0042] like Figure 6 As shown, the lower surface of the top plate 1 is located on the right side of the L-shaped mounting frame 5 and is fixedly connected with a transfer chamber 35. A ventilation pipe 2 36 is fixedly connected between the transfer chamber 35 and the air pressure box 1 28. The end of the ventilation pipe 2 36 away from the transfer chamber 35 is located inside the air pressure box 1 28 and is fixedly connected with a solenoid valve 2 37. The left side of the transfer chamber 35 is fixedly connected with two ventilation pipes 38. The left end of the ventilation pipe 38 is located on the outer wall of the tightening cylinder 3 and is fixedly connected with a sealing ring 39. The inner side of the sealing ring 39 is integrally formed with a ventilation groove 40. A plurality of air cavities 41 are provided inside the tightening cylinder 3. The air cavities 41 are connected with the ventilation grooves 40. A piston plate 42 is slidably connected inside the air cavity 41. A baffle plate 43 is integrally formed on the outer wall of the piston plate 42. The end of the baffle plate 43 away from the piston plate 42 passes through the inner side of the tightening cylinder 3.

[0043] As the top plate 1 continues to descend, the solenoid valve 1 33 is controlled to close and the solenoid valve 2 37 is opened. At this time, the gas inside the air pressure box 1 28 will be filled into the multiple air cavities 41, blocking the top of the nut entering the tightening tube 3 to prevent the nut from moving and affecting the assembly when the nut is spliced ​​with the bolt. Then, as the top plate 1 descends, the motor 6 is started to control the tightening tube 3 to rotate, so that the nut rotates while descending, which is convenient for threading and assembly to the bolt to complete the processing.

[0044] like Figure 7 As shown, a plurality of shrinkage cavities 44 are provided on the lower surface of the tightening cylinder 3, a sliding sheet 45 is slidably connected to the inside of the shrinkage cavity 44, a spring 46 is fixedly connected between the sliding sheet 45 and the shrinkage cavity 44, a conical anti-slipping head 47 is fixedly connected to the side of the sliding sheet 45 away from the spring 46, and one end of the conical anti-slipping head 47 away from the sliding sheet 45 penetrates to the inner side of the tightening cylinder 3;

[0045] By providing a plurality of elastically contractible conical anti-dropping heads 47, the nut dropped into the tightening cylinder 3 can be limited to prevent the nut from falling out before being spliced ​​to the bolt. When the nut is screwed to the end of the bolt and the assembly is completed, the top plate 1 is controlled to rise, and the conical anti-dropping heads 47 are squeezed and contracted, so that the nut can be easily detached.

[0046] After the nut splicing is completed, the electric telescopic rod 14 is controlled to extend and the motor 6 is turned off at the same time. At this time, the top plate 1 rises, so that the air pressure box 28 draws out the internal gas of the air cavity 41, so that the multiple baffles 43 shrink, which is convenient for the subsequent nuts to enter the tightening tube 3, and then the solenoid valve 37 is closed, and the solenoid valve 33 is opened, so that the air pressure box 28 draws out the internal gas of the air pressure box 31. At this time, the baffle 20 moves to the right and the baffle 21 moves to the left, extending into the interior of the nut tube 2, blocking the bottom of the multiple nuts, which is convenient for the subsequent single nut delivery.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An automatic processing device for forming a pressure-resistant U-shaped bolt, comprising a top plate (1), characterized in that: Two nut cylinders (2) are embedded and installed on the left side of the upper surface of the top plate (1); two tightening cylinders (3) are rotatably connected to the left side of the lower surface of the top plate (1) via a rotating shaft; the outer wall of the tightening cylinder (3) is fixedly connected to a gear ring (4); the lower surface of the top plate (1) is located on the right side of the two tightening cylinders (3) and is fixedly connected to an L-shaped mounting frame (5); a motor (6) is fixedly connected below the inner wall of the L-shaped mounting frame (5); a bracket (7) is fixedly connected to the right side of the inner wall of the L-shaped mounting frame (5); the upper surface of the bracket (7) is connected to a gear 1 (8) via a rotating shaft; the center of the lower surface of the gear 1 (8) is located on the lower surface of the bracket (7) and is fixedly connected to a transmission wheel (9); the outer walls of the two transmission wheels (9) are jointly driven. A transmission belt (10) is connected, the top end of the output shaft of the motor (6) is fixedly connected to the center of the lower surface of the transmission wheel (9) located in front of the lower surface of the bracket (7), and the two gears (8) are respectively meshed with the outer walls of the two gear rings (4); a vertical plate (11) is arranged on the right side of the top plate (1), the lower surface of the vertical plate (11) is fixedly connected to the bottom plate (12), and the right side of the upper surface of the bottom plate (12) is fixedly connected to two guide rods (13), the top end of the guide rod (13) passes through the top plate (1) and is slidably connected to the top plate (1), and the left side of the vertical plate (11) is fixedly connected to an electric telescopic rod (14), and the top end of the output end of the electric telescopic rod (14) is fixedly connected to the lower surface of the top plate (1).

2. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 1, characterized in that: The upper surface of the bottom plate (12) is symmetrically fixedly connected to a support plate (15), and the top ends of the two support plates (15) are commonly fixedly connected to a U-shaped placement frame (16).

3. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 2, characterized in that: The inner lower surface of the U-shaped placement rack (16) is provided with an arc-shaped groove (17), and the inner upper surface of the U-shaped placement rack (16) is integrally formed with an arc-shaped strip (18).

4. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 1, characterized in that: Two through slots (19) are provided at the lower right sides of the two nut tubes (2); a blocking piece (20) and a blocking piece (21) are slidably connected inside the two through slots (19) located above and below the right sides of the nut tubes (2); a cross bar (22) is fixedly connected to the right sides of the two blocking pieces (20); a cross bar (23) is fixedly connected to the right sides of the two blocking pieces (21); and a rack (24) and a rack (25) are fixedly connected to the right sides of the cross bar (22) and the right sides of the cross bar (23).

5. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 4, characterized in that: The upper surface of the top plate (1) is fixedly connected with mounting heads (26) located in front and rear of the second rack (25), respectively; between the two mounting heads (26), a second gear (27) is fixedly connected between the first rack (24) and the second rack (25); the first rack (24) and the second rack (25) are both meshedly connected with the second gear (27).

6. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 5, characterized in that: A pressure box (28) is fixedly connected to the front left side of the vertical plate (11), a piston plate (29) is slidably connected to the interior of the pressure box (28), a push rod (30) is fixedly connected to the upper surface of the piston plate (29), and the top end of the push rod (30) passes through the top of the pressure box (28) and is fixedly connected to the lower surface of the top plate (1).

7. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 6, characterized in that: A second air pressure box (31) is fixedly connected to the right side of the upper surface of the top plate (1); a ventilation pipe (32) is fixedly connected between the second air pressure box (31) and the first air pressure box (28); an end of the ventilation pipe (32) away from the second air pressure box (31) is located inside the first air pressure box (28) and a solenoid valve (33) is fixedly installed; a piston plate (34) is slidably connected inside the second air pressure box (31); the left side of the piston plate (34) is fixedly connected to the right end of the rack (24).

8. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 7, characterized in that: The lower surface of the top plate (1) is located on the right side of the L-shaped mounting frame (5) and is fixedly connected to a transfer chamber (35). A ventilation pipe (36) is fixedly connected between the transfer chamber (35) and the air pressure box (28). The end of the ventilation pipe (36) away from the transfer chamber (35) is located inside the air pressure box (28) and is fixedly connected to a solenoid valve (37). The left side of the transfer chamber (35) is fixedly connected to two ventilation pipes (38). The left end of the ventilation pipe (38) is located at the tightening cylinder. The outer wall of the tightening tube (3) is fixedly connected with a sealing ring (39), and the inner side of the sealing ring (39) is integrally formed with a ventilation groove (40). A plurality of air cavities (41) are provided inside the tightening tube (3), and the air cavities (41) are connected with the ventilation grooves (40). A piston plate (42) is slidably connected inside the air cavities (41). The outer wall of the piston plate (42) is integrally formed with a baffle plate (43), and one end of the baffle plate (43) away from the piston plate (42) passes through the inner side of the tightening tube (3).

9. The automatic processing device for forming pressure-resistant U-shaped bolts according to claim 1, characterized in that: A plurality of contraction cavities (44) are provided on the lower surface of the tightening cylinder (3), a sliding sheet (45) is slidably connected inside the contraction cavity (44), a spring (46) is fixedly connected between the sliding sheet (45) and the contraction cavity (44), a conical anti-slipping head (47) is fixedly connected to the side of the sliding sheet (45) away from the spring (46), and an end of the conical anti-slipping head (47) away from the sliding sheet (45) passes through the inner side of the tightening cylinder (3).

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