Automatic assembly device for U-shaped tube metal ring

Abstract

The present invention discloses an automatic assembly device for U-shaped tube metal rings, comprising a frame mechanism, a clamping mechanism, a pressing mechanism, and a movable jig mechanism. The clamping mechanism comprises a movable jig base, a jig front opening, and a clamping cylinder. The pressing mechanism comprises a pressing mechanism base plate, a pressing cylinder base plate fixedly connected to the pressing mechanism base plate, and a pressing cylinder disposed on the pressing cylinder base plate. The movable jig mechanism comprises a movable jig, a plurality of U-shaped tubes fixed in the movable jig, and a metal ring sleeved in the U-shaped tube. The clamping cylinder pushes the jig front opening to press the movable jig, and the pressing cylinder pushes the pressing plate base plate to press the U-shaped tube, thereby clamping the metal ring in the U-shaped tube. The present invention can tightly sleeve the metal ring in the U-shaped tube, ensure the dimensional accuracy of the two ends of the U-shaped tube and the lower end of the metal ring, and improve production quality. Multiple U-shaped tube metal rings can be installed, and an automatic assembly production operation method is adopted. The device is simple to operate and effectively improves work efficiency.

Description

Technical Field

[0001] The invention relates to a U-shaped tube assembly device, in particular to an automatic assembly device for a U-shaped tube metal ring. Background Art

[0002] U-shaped tubes are widely used in air conditioners. In actual use, both ends of the U-shaped tube need to be clamped together with metal rings. The lower end of the metal ring and the end of the U-shaped tube must meet certain dimensions, and the deviation cannot be too large. After the metal ring is fitted with the U-shaped tube, it needs to be clamped tightly to the U-shaped tube and cannot slide up or down.

[0003] At present, manual operation is generally adopted, in which two metal rings are manually put on the two ends of the U-shaped tube, and then the two ends of the U-shaped tube are manually pressed into the holes of the matching fixture. Although the dimensional accuracy of the two ends of the U-shaped tube and the lower end surface of the metal ring can be guaranteed to a certain extent, it cannot well ensure that the metal ring can be clamped on the U-shaped tube. In addition, the metal ring and the U-shaped tube are loosely matched, and the size is easily changed, which is easy to affect the product quality. Therefore, a device that can automatically assemble the metal ring of the U-shaped tube is needed to replace manual operation. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the current U-shaped tube assembly device, the present invention provides an automatic assembly device for U-shaped tube metal rings, which can improve the work efficiency of assembling U-shaped tube metal rings. The device is simple to operate and achieves high assembly accuracy and low error.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0006] A U-shaped tube metal ring automatic assembly device, including a frame mechanism, the frame mechanism includes a base plate, a profile column arranged on the base plate and a profile beam arranged on the profile column, the automatic assembly device also includes a clamping mechanism, a pressing mechanism and a movable fixture mechanism, the clamping mechanism includes a movable fixture base, a fixture front mouth and a clamping cylinder, the movable fixture base is fixedly connected to the base plate, the movable fixture mechanism is detachably connected to the movable fixture base; the pressing mechanism includes a pressing mechanism base plate, a pressing mechanism and a clamping cylinder. The base plate is fixedly connected to the downward pressing cylinder base plate and the downward pressing cylinder is arranged on the downward pressing cylinder base plate, the downward pressing cylinder is fixedly connected to the downward pressing plate base plate, and the downward pressing mechanism base plate is fixedly connected to the profile beam; the movable jig mechanism includes a movable jig, a plurality of U-shaped tubes fixed in the movable jig and a metal ring sleeved in the U-shaped tube; the clamping cylinder pushes the front mouth of the jig to press the movable jig, and the downward pressing cylinder pushes the downward pressing plate base plate to press the U-shaped tube, so that the metal ring is clamped in the U-shaped tube.

[0007] According to one aspect of the present invention, the clamping mechanism also includes a fixed block profile base fixedly connected to the substrate, a clamping cylinder substrate is fixedly connected to the fixed block profile base, a clamping cylinder fixing block is fixedly connected to the clamping cylinder substrate, the clamping cylinder fixing block is fixedly connected to the clamping cylinder, and a plurality of first exhaust throttle valves are provided on one side of the clamping cylinder.

[0008] According to one aspect of the present invention, the clamping mechanism also includes a jig front mouth fixing block, the clamping cylinder is connected to the jig front mouth fixing block through the clamping cylinder movable block, the jig front mouth fixing block is fixedly connected to the jig front mouth, and a first axis fixing frame is provided on the clamping cylinder base plate, and a plurality of guide shafts are passed through the first axis fixing frame, and one end of the guide shaft is fixedly connected to the jig front mouth fixing block.

[0009] According to one aspect of the present invention, a plurality of buffer fixing frames and positioning pins are provided on the movable fixture base, and a buffer is provided on the buffer fixing frame.

[0010] According to one aspect of the present invention, a screw adjustment assembly, a linear bearing assembly and a pressing mechanism locking mechanism are provided between the pressing cylinder base plate and the pressing mechanism base plate.

[0011] According to one aspect of the present invention, a downward pressure cylinder fixing block and a plurality of second axis fixing frames are provided on the downward pressure cylinder base plate, a plurality of guide rods are passed through the second axis fixing frames, one end of the guide rod is fixedly connected to the downward pressure plate base plate, the downward pressure cylinder is connected to the downward pressure plate base plate through a downward pressure cylinder movable block, and a plurality of second exhaust throttle valves are provided on one side of the downward pressure cylinder.

[0012] According to one aspect of the present invention, the automatic assembly device further includes a pneumatic part and an electrical part, the electrical part includes a control chassis, a power supply, multiple relays, multiple time relays and multiple button switches, and the electrical part is arranged on the substrate.

[0013] According to one aspect of the present invention, the air circuit portion includes a pressure regulating valve, a first reversing valve and a second reversing valve, the first reversing valve is electrically connected to the downward pressure cylinder, the second reversing valve is electrically connected to the clamping cylinder, and the pressure regulating valve is connected to the first reversing valve and the second reversing valve.

[0014] Advantages of the implementation of the present invention: The present invention provides an automatic assembly device for U-shaped tube metal rings, including a frame mechanism, a clamping mechanism, a pressing mechanism, a movable jig mechanism, an air circuit part and an electrical part. The clamping mechanism includes a movable jig base, a jig front mouth and a clamping cylinder; the pressing mechanism includes a pressing mechanism substrate, a pressing cylinder substrate fixedly connected to the pressing mechanism substrate and a pressing cylinder arranged on the pressing cylinder substrate; the movable jig mechanism includes a movable jig, a plurality of U-shaped tubes fixed in the movable jig and a metal ring sleeved in the U-shaped tube; the clamping cylinder pushes the jig front mouth to press the movable jig, and the pressing cylinder pushes the pressing plate substrate to press the U-shaped tube, so that the metal ring is clamped in the U-shaped tube, while ensuring the dimensional accuracy of the two ends of the U-shaped tube and the lower end of the metal ring, thereby improving the production quality; multiple U-shaped tube metal rings can be installed in one assembly, and an automatic assembly production operation method is adopted. The device is simple to operate and effectively improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the appearance of an automatic assembly device for a U-shaped tube metal ring according to the present invention;

[0017] Figure 2 It is a structural schematic diagram of the frame mechanism of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the pressing mechanism of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the movable fixture mechanism of the present invention;

[0021] Figure 6 It is a structural diagram of the electrical part of the present invention;

[0022] Figure 7 Schematic diagram of the structure of the gas path part of the present invention;

[0023] Figure 8 This is an electrical schematic diagram of the automatic assembly device for U-shaped tube metal rings according to the present invention;

[0024] Figure 9 This is the electrical schematic diagram of the cylinder working according to the present invention.

[0025] In the figure: 1. Frame mechanism; 11. Base plate; 12. Profile column; 13. Profile crossbeam; 14. Profile angle piece; 15. Profile end cap; 16. Support leg; 2. Clamping mechanism; 21. Movable fixture base; 211. Buffer fixing bracket; 212. Buffer; 213. Positioning pin; 22. Front opening of fixture; 221. Fixing block for front opening of fixture; 23. Clamping cylinder; 231. Clamping cylinder fixing block; 232. Clamping cylinder base plate; 233. Fixing block profile base; 234. First exhaust throttle valve; 235. First axis fixing bracket; 236. Guide shaft; 3. Pressing mechanism; 31. Pressing mechanism base plate; 32. Pressing cylinder base plate; 321. Pressing cylinder fixing block; 322. Second axis fixing bracket; 323 , guide rod; 33, downward pressure cylinder; 331, second exhaust throttle valve; 34, downward pressure plate base plate; 35, screw; 351, height adjustment knob; 352, screw fixing seat; 353, screw moving block; 36, linear bearing fixing block; 361, linear bearing; 362, bearing base; 37, downward pressure mechanism locking frame; 371, locking handle; 38, downward pressure buffer base; 381, downward pressure buffer fixing block; 382, ​​downward pressure buffer; 4, movable fixture mechanism; 41, movable fixture; 42, U-shaped tube; 43, metal ring; 44, handle; 5, push button switch; 51, control chassis; 52, time relay; 53, relay; 6, pressure regulating valve; 61, first reversing valve; 62, second reversing valve. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections, or integral connections; mechanical or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the embodiments of the present device, if there is no additional description on the fixed connection method, bolt connection is assumed to be used.

[0031] like Figures 1 to 6 As shown, an automatic assembly device for a U-shaped tube metal ring includes a frame mechanism 1, a clamping mechanism 2, a pressing mechanism 3 and a movable fixture mechanism 4, wherein the frame mechanism 1 includes a base plate 11, a profile column 12 provided on the base plate 11 and a profile beam 13 provided on the profile column 12. In this device, two profile columns 12 and one profile beam 13 are provided, and the profile column 12 is fixed to the base plate 11 by a profile angle piece 14 and a bolt. The profile beam 13 is fixedly connected to the profile column 12 by a profile end cover 15, and a support foot 16 is installed at each of the four corners of the bottom surface of the base plate 11.

[0032] In actual application, the clamping mechanism 2 includes a movable jig base 21, a jig front mouth 22 and a clamping cylinder 23. The movable jig base 21 is fixedly connected to the substrate 11. This fixed connection method can be a bolt connection. The movable jig mechanism 4 is detachably connected to the movable jig base 21; wherein, the movable jig base 21 is further provided with a plurality of buffer fixing frames 211 and positioning pins 213. The positioning pins 213 are used to position and fix the movable jig mechanism 4 when it is fixed to the movable jig base 21; the device is provided with two buffer fixing frames 211, each of which is provided on both sides of the movable jig base 21. The buffer fixing frame 211 is fixed to the movable jig base 21 by bolts, and a buffer 212 is provided on the buffer fixing frame 211;

[0033] The clamping mechanism 2 also includes a fixed block profile base 233 fixedly connected to the base plate 11, a clamping cylinder base plate 232 fixedly connected to the fixed block profile base 233, a clamping cylinder fixed block 231 fixedly connected to the clamping cylinder base plate 232, and a clamping cylinder fixed block 231 fixedly connected to the clamping cylinder 23. A plurality of first exhaust throttle valves 234 are provided on one side of the clamping cylinder 23. The device is provided with two first exhaust throttle valves 234 for compressed air to enter the first exhaust throttle valves 234 to control the speed of movement of the clamping cylinder 23.

[0034] The clamping mechanism 2 also includes a jig front mouth fixed block 221, the clamping cylinder 23 is connected to the jig front mouth fixed block 221 through the clamping cylinder movable block, the jig front mouth fixed block 221 is fixedly connected to the jig front mouth 22, and a first axis fixing frame 235 is provided on the clamping cylinder base plate 232. The device is fixedly connected to a first axis fixing frame 235 on both sides of the clamping cylinder base plate 232, and a plurality of guide shafts 236 are passed through the first axis fixing frame 235. The first axis fixing frame 235 on each side can be passed through two guide shafts 236, and a guide shaft bushing is also provided between the guide shaft 236 and the first axis fixing frame 235. The guide shaft 236 is fixedly connected to the jig front mouth fixed block 221 at one end close to the jig front mouth fixed block 221, that is, when the clamping cylinder 23 is in action, it pushes the clamping cylinder movable block so that the jig front mouth fixed block 221 maintains horizontal movement under the action of the guide shaft 236.

[0035] In actual application, the pressing mechanism 3 includes a pressing mechanism base plate 31, a pressing cylinder base plate 32 fixedly connected to the pressing mechanism base plate 31, and a pressing cylinder 33 provided on the pressing cylinder base plate 32. The pressing cylinder 33 is fixedly connected to a pressing plate base plate 34. The pressing mechanism base plate 31 is fixedly connected to the profile beam 13 by four bolts.

[0036] The downward pressure cylinder base plate 32 is provided with a downward pressure cylinder fixing block 321 and a plurality of second axis fixing frames 322. The present device is provided with a second axis fixing frame 322 on both sides of the downward pressure cylinder base plate 32. The second axis fixing frame 322 is penetrated by a plurality of guide rods 323. The second axis fixing frame 322 on each side can be penetrated by two guide rods 323. A guide rod bushing is also provided between the guide rod 323 and the second axis fixing frame 322. A guide rod bushing fixing block is also provided outside the guide rod bushing. The guide rod 323 is fixedly connected to the downward pressure plate base plate 34 at one end close to the downward pressure cylinder 33. The downward pressure cylinder 33 is connected to the downward pressure plate base plate 34 through the downward pressure cylinder movable block. A plurality of second exhaust throttle valves 331 are provided on one side of the downward pressure cylinder 33. The present device is provided with two second exhaust throttle valves 331 for compressing air to enter the second exhaust throttle valve 331 to control the speed of movement of the downward pressure cylinder 33.

[0037] In practical applications, a screw adjustment assembly, a linear bearing assembly, and a pressing mechanism locking mechanism are provided between the pressing cylinder base plate 32 and the pressing mechanism base plate 31;

[0038] Among them, the screw adjustment assembly includes a screw 35, a screw moving block 353, a screw fixing seat 352 and a height adjustment knob 351. The screw fixing seat 352 is fixedly connected to the downward pressure mechanism base plate 31. The screw fixing seat 352 is provided with a screw 35. The top of the screw 35 is provided with a height adjustment knob 351, and the bottom of the screw 35 is connected to the screw moving block 353. Since the heights of different models of U-shaped tubes are different during assembly, the screw adjustment assembly can adjust the downward pressure mechanism 3 to a suitable height position according to different U-shaped tubes.

[0039] The linear bearing assembly includes a linear bearing fixing block 36, a linear bearing 361 and a bearing base 362. The linear bearing fixing block 36 and the bearing base 362 are fixedly connected to the downward pressure mechanism substrate 31. The other end of the bearing base 362 is fixedly connected to the downward pressure cylinder substrate 32 to fix the downward pressure cylinder substrate 32. The linear bearing 361 is arranged between the linear bearing fixing block 36 and the bearing base 362 to play an upward and downward guiding role.

[0040] The pressing mechanism locking mechanism includes a pressing mechanism locking frame 37 and a locking handle 371 provided on the pressing mechanism locking frame 37. The pressing mechanism locking frame 37 fixes the pressing mechanism base plate 31 and the pressing cylinder base plate 32 respectively, and the fixing connection method is bolt connection.

[0041] In addition, a downward pressure buffer base 38 is fixedly connected to the base plate 11, and a downward pressure buffer fixing block 381 is provided on the downward pressure buffer base 38. A downward pressure buffer 382 is provided in the downward pressure buffer fixing block 381. The downward pressure buffer base 38 is located on both sides directly below the downward pressure plate base plate 34;

[0042] During actual use, when the pressing cylinder 33 is in motion, it pushes the pressing cylinder movable block so that the pressing plate base plate 34 can keep moving vertically under the action of the guide rod 323 .

[0043] In actual application, the movable jig mechanism 4 includes a movable jig 41, several U-shaped tubes 42 fixed in the movable jig 41, and a metal ring 43 sleeved in the U-shaped tube 42. The device can place four U-shaped tubes 42 at one time. The metal ring 43 is sleeved on both sides of the U-shaped tube 42. In order to facilitate the removal of the movable jig mechanism 4, a handle 44 is also provided on the movable jig 41; in actual work, the clamping cylinder 23 pushes the front mouth 22 of the jig to press the movable jig 41, and the downward pressure cylinder 33 pushes the downward pressure plate base plate 34 to press the U-shaped tube 42, so that the metal ring 43 is clamped in the U-shaped tube 42.

[0044] In actual application, the automatic assembly device also includes a pneumatic part and an electrical part. The electrical part includes a control chassis 51, a power supply, multiple relays 53, multiple time relays 52 and multiple button switches 5. The electrical part is arranged on the substrate 11. This device is provided with two button switches 5, two relays 53, and two time relays 52. The button switch 5 can be a self-resetting moment button box.

[0045] The air circuit part includes a pressure regulating valve 6, a first reversing valve 61 and a second reversing valve 62. The first reversing valve 61 is electrically connected to the downward pressure cylinder 33, and the second reversing valve 62 is electrically connected to the clamping cylinder 23. The pressure regulating valve 6 is connected to the first reversing valve 61 and the second reversing valve 62. The first reversing valve 61 and the second reversing valve 62 can be installed on the profile beam 13. The first reversing valve 61 and the second reversing valve 62 can be single-control self-resetting two-position five-way reversing valves.

[0046] The electrical working principle of this device is as follows:

[0047] like Figure 7 、 Figure 8 As shown, when the device is powered on, pushbutton switches SB1 and SB2 are pressed simultaneously, energizing relays KM1 and KM2. Relay KM1's normally open contact KM1 closes until KM1 self-locks. Simultaneously, relay KM2's normally open contact KM2 closes, energizing KT1, KT2, and YV1. KT1 is set to a delay of 1 second. After 1 second, KT1's normally open contact closes until YV2 is energized. KT2 is set to a delay of 3 seconds. After 3 seconds, normally closed contact KT2 opens, de-energizing relay KM1. After relay KM1 is de-energized, its normally open contact opens, and KT1, KT2, YV1, YV2, and relay KM2 are simultaneously de-energized, after which the two cylinders reset. In the above description, KT1 and KT2 are time relays, YV1 is the first reversing valve 61, and YV2 is the second reversing valve 62.

[0048] Specifically, the movable fixture 41 is placed on the movable fixture base 21. When the device is powered on, the first reversing valve 61 is opened to the left position, and compressed air enters the front part of the pressing cylinder 33 from the second exhaust throttle valve 331, and the push rod of the pressing cylinder 33 rises; at the same time, the second reversing valve 62 is opened to the left position, and compressed air enters the front part of the clamping cylinder 23 from the first exhaust throttle valve 234, and the push rod of the clamping cylinder 23 retracts.

[0049] Press and hold the pushbutton switches SB1 and SB2 to activate the first reversing valve 61. The first reversing valve 61 is open to the right position, and the compressed air enters the rear part of the pressing cylinder 33 from the second exhaust throttle valve 331. The push rod of the pressing cylinder 33 descends, pressing the U-shaped tube 42 downward.

[0050] After 1 second, the second reversing valve 62 works and opens to the right position. The compressed air enters the rear part of the clamping cylinder 23 from the first exhaust throttle valve 234, pushing the push rod of the clamping cylinder 23 forward and pressing the movable fixture 41.

[0051] After 3 seconds, the electrical circuit is disconnected, the first reversing valve 61 and the second reversing valve 62 are powered off, and the first reversing valve 61 and the second reversing valve 62 are switched to the left position by self-reset, so that the push rod of the pressing cylinder 33 rises and the push rod of the clamping cylinder 23 retreats.

[0052] The above steps complete the automatic assembly of the U-shaped tube metal ring.

[0053] The present device provides an automatic assembly device for metal rings of U-shaped tubes, which presses the U-shaped tube and the metal ring through a clamping mechanism and a pressing mechanism. The power of the clamping mechanism is provided by a clamping cylinder, and the power of the pressing mechanism is provided by a pressing cylinder. The directions of the clamping cylinder and the pressing cylinder are controlled by a first reversing valve and a second reversing valve. The movement speeds of the clamping cylinder and the pressing cylinder are controlled by a first exhaust throttle valve and a second exhaust throttle valve. The first reversing valve and the second reversing valve are controlled by a relay and a time relay. Through the above-mentioned arrangement, the metal ring can be tightly sheathed in the U-shaped tube, and at the same time, the dimensional accuracy of the two ends of the U-shaped tube and the lower end of the metal ring is guaranteed, thereby improving the production quality. Multiple U-shaped tube metal rings can be installed at one time, and a fully automatic assembly production operation mode is adopted. The device is simple to operate and effectively improves the work efficiency.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An automatic assembly device for a U-shaped tube metal ring, comprising a frame mechanism, wherein the frame mechanism comprises a base plate, a profile column provided on the base plate, and a profile beam provided on the profile column, characterized in that: The automatic assembly device also includes a clamping mechanism, a pressing mechanism and a movable fixture mechanism, the clamping mechanism includes a movable fixture base, a fixture front mouth and a clamping cylinder, the movable fixture base is fixedly connected to the base plate, and the movable fixture mechanism is detachably connected to the movable fixture base; the pressing mechanism includes a pressing mechanism base plate, a pressing cylinder base plate fixedly connected to the pressing mechanism base plate, and a pressing cylinder provided on the pressing cylinder base plate, the pressing cylinder is fixedly connected to the pressing plate base plate, the pressing mechanism base plate is fixedly connected to the pressing plate base plate, and the pressing mechanism base plate is fixedly connected to the pressing plate base plate. The profile crossbeam is fixedly connected; the movable jig mechanism includes a movable jig, a plurality of U-shaped tubes fixed in the movable jig, and a metal ring sleeved in the U-shaped tube; the clamping cylinder pushes the front end of the jig to press the movable jig, and the downward pressure cylinder pushes the downward pressure plate substrate to press the U-shaped tube, so that the metal ring is clamped in the U-shaped tube, and the clamping mechanism also includes a fixed block profile base fixedly connected to the substrate, and a clamping cylinder substrate is fixedly connected to the fixed block profile base. The cam is fixedly connected to the plate, and the cam is fixedly connected to the cam, and a plurality of first exhaust throttle valves are provided on one side of the cam, and the cam mechanism further comprises a jig front fixing block, and the cam is connected to the jig front fixing block through the cam movable block, and the jig front fixing block is fixedly connected to the jig front. The cam is provided with a first shaft fixing bracket on the cam, and a plurality of guide shafts are passed through the first shaft fixing bracket, and one end of the guide shaft is fixedly connected to the jig front fixing block. A screw adjustment assembly, a linear bearing assembly and a jig locking mechanism are provided between the pressing cylinder base plate and the pressing mechanism base plate. The pressing cylinder base plate is provided with a pressing cylinder fixing block and a plurality of second shaft fixing brackets, and a plurality of guide rods are passed through the second shaft fixing bracket, and one end of the guide rod is fixedly connected to the pressing plate base plate, and the pressing cylinder is connected to the pressing plate base plate through the pressing cylinder movable block, and a plurality of second exhaust throttle valves are provided on one side of the pressing cylinder.

2. The automatic assembly device for U-shaped tube metal rings according to claim 1, characterized in that: A plurality of buffer fixing frames and positioning pins are provided on the movable fixture base, and a buffer is provided on the buffer fixing frame.

3. The automatic assembly device for U-shaped tube metal rings according to any one of claims 1 to 2, characterized in that: The automatic assembly device further comprises an air circuit part and an electrical part. The electrical part comprises a control chassis, a power supply, a plurality of relays, a plurality of time relays and a plurality of button switches. The electrical part is arranged on the substrate.

4. The automatic assembly device for U-shaped tube metal rings according to claim 3, characterized in that: The air circuit part includes a pressure regulating valve, a first reversing valve and a second reversing valve, the first reversing valve is electrically connected to the pressing cylinder, the second reversing valve is electrically connected to the clamping cylinder, and the pressure regulating valve is connected to the first reversing valve and the second reversing valve.

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