A feed device and method for precision metal tube processing

Abstract

The application discloses a kind of propelling feed device and method for precision metal pipe processing, it is related to metal pipe processing technical field, including outer frame and metal pipe, still include multiple groups of clamping components installed in the inside of outer frame.Advantages are that: the present application adopts three groups of chain encloses clamping layout, through rubber pad and metal patch composite conformal deformation structure on chain link, metal pipe outer wall can be self-adaptingly attached, rely on increase contact friction force to realize smooth propulsion conveying, avoid pipe surface scratch;While supporting setting sucking disc mechanism, auxiliary limiting is realized using mechanical negative pressure adsorption, automatic pressure relief loosening at operation end, double protection completely solve the problem that smooth metal pipe conveying is easy to slip, run deviation, whole machine structure modularization linkage can be adapted to multiple specifications pipe material, degree of automation is high, feeding precision is good, wear-resistant and durable, effectively satisfy the production demand of precision metal pipe high-precision continuous propelling feed.

Description

Technical Field

[0001] This invention relates to the field of metal tube processing technology, and in particular to a feeding device and method for precision metal tube processing. Background Technology

[0002] Precision metal tubes are widely used in hydraulic pipelines, instruments and meters, aerospace parts, machinery manufacturing and other fields. In continuous processing steps such as cutting, grinding and turning, automatic feeding devices are the core supporting equipment to ensure the continuity, accuracy and surface integrity of tube conveying.

[0003] Existing metal pipe feeding mechanisms mostly employ roller clamping, single chain conveying, and rigid clamping methods, which generally suffer from poor clamping fit, easy slippage during conveying, narrow pipe diameter compatibility range, easy scratching of the outer wall of the pipe, and lack of auxiliary limiting and anti-deviation structures. Therefore, CN22425748U discloses a pipe fitting chain conveying device with adjustable conveying angle, which includes a mounting frame. A longitudinal support is rotatably connected between the upper and lower mounting frames via a pivot pin. A transverse support is welded and fixed between the front and rear mounting frames. A bearing pivot pin is rotatably connected to the upper surface of the transverse support. A driven shaft is rotatably connected to the top of the bearing pivot pin. A geared disc is welded and fixed to the outer surface of the driven shaft. The geared disc meshes with and drives a chain. A limit block is welded and fixed to the upper surface of the chain. A pipe fitting body is movably connected to the surface of the limit block.

[0004] When the aforementioned adjustable conveying angle pipe fitting chain conveyor is conveying pipe fittings, the drive shaft rotates, driving the universal joint to rotate via the external pin. The universal joint then drives the driven shaft to rotate via the internal pin, and the driven shaft drives the gear disc to rotate. The gear disc then drives the chain to move. This chain movement drives the limit block to move, thus conveying the pipe fitting. When the conveying angle of the pipe fitting needs to be adjusted, the first and second pneumatic rods on both sides of the front cylinder extend or retract, and the first and second pneumatic rods on both sides of the rear cylinder... The second pneumatic rod retracts or extends, meaning the first and second pneumatic rods move in opposite directions. Through the outer and inner adapter blocks, the outer and inner ball sleeves can be deflected. Furthermore, through the support of the bearing pin, the inner ball sleeve can drive the driven shaft to deflect. At this time, the inner ball sleeve and the driven shaft slide against each other, and the universal joint deflects. The drive shaft can still drive the universal joint to rotate. When the driven shaft rotates, it can drive the gear plate to rotate. The gear plate can drive the chain to deflect. When the chain deflects, the conveying angle of the pipe body can be adjusted. When the driven shaft deflects, the driven shaft can drive the inner end of the universal joint to deflect through the inner pin, so that when the driven shaft is adjusted, the universal joint can still drive the driven shaft to rotate, and the driven shaft after the angle adjustment can drive the chain to rotate, thereby completing the conveying of the pipe body, so as to improve the flexibility of conveying the pipe body.

[0005] The aforementioned and existing technologies, in practical use, only employ single or double chain arrangements, without a three-ring encircling clamping layout. This results in a small circumferential clamping area for circular metal tubes, concentrated force at a single point, and a high susceptibility to localized slippage, feeding deviation, and poor feed uniformity. The chain surface uses only a single piece of ordinary rubber pad, without a composite bonding structure of rubber pads and metal patches. The rubber can only passively contact the tube and cannot adapt to the outer diameter of the tube, nor can it drive the metal patches to bend and adhere to the tube wall. Relying solely on rubber friction is insufficient, making it easy for smooth metal tubes to slip during transport. Furthermore, ordinary rubber is prone to wear and aging, resulting in a short service life. Conventional chain rubber has a fixed integral structure and lacks the ability to deform according to shape, making it unsuitable for various metal tubes with different outer diameters. This leads to weak equipment versatility, requiring a complete change of tooling when changing specifications, and cumbersome debugging.

[0006] Therefore, a new type of propulsion and feeding device for precision metal tube processing can be adopted to overcome the shortcomings of the existing technology. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art by proposing a feeding device and method for precision metal tube processing.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A precision metal tube processing feeder includes an outer frame and a metal tube, and also includes multiple sets of clamping components installed inside the outer frame. The clamping assembly includes a support rod fixedly installed inside the outer frame, a chain machine is mounted on the support rod via a hinge mechanism, and an elastic module that cooperates with the chain machine is mounted on the support rod. The chain machine consists of a support frame and a chain rotatably mounted on the support frame. An adjustment mechanism is installed between the support rod and the support frame. A drive motor for driving the chain to rotate is fixedly installed on the support rod. The chain is composed of numerous chain links. A friction mechanism is fixedly installed on some of the chain links, and a suction cup mechanism is installed on other chain links. The friction mechanism includes a rubber pad fixedly installed on the chain link and a metal plate fixedly installed on the rubber pad. The metal plate abuts against the metal tube to clamp the metal tube. The suction cup mechanism includes a rubber suction cup for adsorbing the metal tube and reducing the probability of slippage caused by pushing the material with friction.

[0009] Preferably, the adjustment mechanism includes a driver fixedly mounted on the support rod, and an elastic module is installed between the driver and the bracket.

[0010] Preferably, the suction cup mechanism further includes a fixing tube fixedly installed on the chain link, a fixing block fixedly installed on the rubber suction cup, a compensation structure installed between the fixing block and the fixing tube, and a plurality of air vents connected to the rubber suction cup on the fixing block.

[0011] Preferably, the compensation structure includes a telescopic tube fixedly installed on and connected to the fixed tube, a compensation spring sleeved on the outside of the telescopic tube, an air outlet connected to the inside of the telescopic tube, a one-way mechanism installed inside the telescopic tube, and a negative pressure amplification mechanism installed between the rubber suction cup and the fixed block.

[0012] Preferably, the one-way mechanism includes an exhaust ring fixedly installed inside the telescopic tube, a plurality of sliding columns are slidably installed through the exhaust ring, an air-blocking plate that cooperates with the exhaust ring is fixedly installed at the same end of the plurality of sliding columns, a circular ring is fixedly installed at the other end of the plurality of sliding columns, a plurality of return springs are fixedly installed between the circular ring and the exhaust ring, and a lifting component that cooperates with the air-blocking plate is installed on the fixed tube.

[0013] Preferably, the lifting component includes multiple hooks fixedly installed on the air baffle plate and a fixing ring fixedly installed inside the fixing tube. A hollow frame is rotatably installed on the fixing ring, and a rod is slidably installed on the hollow frame. A chuck that cooperates with the multiple hooks is fixedly installed at the end of the rod. A driving component is installed between the bracket, the hollow frame and the rod.

[0014] Preferably, the driving component includes an arc-shaped spring plate fixedly installed inside the bracket, a rubber disc cooperating with the arc-shaped spring plate is fixedly installed at the end of the rod away from the chuck, a plurality of wedges are fixedly installed on the rubber disc, and a plurality of pressure balls cooperating with the wedges are rolled on the fixed tube; Multiple columns are fixedly installed on the hollow frame, and a ring is slidably installed on the multiple columns. A spring coil is fixedly installed between the ring and the rod.

[0015] Preferably, the negative pressure amplification mechanism includes multiple air chambers and multiple exhaust chambers opened inside the fixed block. Each exhaust chamber is connected to a corresponding air chamber and an air outlet. A one-way pipe is fixedly installed in each exhaust chamber. Each air chamber is connected to the inside of a rubber suction cup. Multiple suction structures that cooperate with the corresponding air chambers are installed between the rubber suction cup and the fixed block.

[0016] Preferably, the suction structure includes a first roller and a second roller rotatably mounted on a fixed block. A first toothed disc is fixedly mounted on the first roller, and a spring ring is fixedly mounted between the first toothed disc and the fixed block. A second toothed disc is fixedly mounted on the second roller. The first toothed disc and the second toothed disc mesh, and the size of the first toothed disc is larger than the size of the second toothed disc. A fixing plate is fixedly mounted on the side arm of the rubber suction cup, and a pull rope is fixedly mounted on the fixing plate. The end of the pull rope away from the fixing plate is wound around the first roller. A rope body is wound around the second roller, and a piston disc is fixedly mounted on the end of the rope body away from the first roller. The piston disc is slidably mounted inside the air cavity.

[0017] The present invention also provides a feeding method for precision metal tube processing, including the above-mentioned feeding device for precision metal tube processing, and further comprising the following steps: S1. First, place the metal tube to be processed inside the outer frame so that the outer frame covers the metal tube, and then lock the outer frame. S2. Next, adjust the position of the bracket by adjusting the mechanism so that the friction mechanism on the chain abuts against the metal tube. Then start the drive motor. The drive motor will drive the chain to rotate on the bracket, thereby driving the friction mechanism to rotate. The friction mechanism will drive the metal tube to move through friction, thereby realizing the feeding of the metal tube. S3. After the friction mechanism comes into contact with the metal tube, the rubber suction cup in the suction cup mechanism will also come into contact with the metal tube. Under the pressure, the air inside the rubber suction cup will be expelled, making the inside of the rubber suction cup negative pressure, which will have an adsorption effect on the metal tube and effectively prevent slippage. When the rubber suction cup moves close to the end of the bracket, the internal operation of the suction cup mechanism will replenish the air inside the rubber suction cup, thereby releasing the negative pressure inside the rubber suction cup and allowing the rubber suction cup to detach smoothly from the metal tube.

[0018] Compared with existing technologies, the advantages of this invention are: 1. This precision metal tube processing feeder features multiple clamping components arranged inside the outer frame, forming a three-chain encircling layout. Compared to existing single-chain or double-chain conveyor structures, it can clamp the metal tube from multiple circumferential directions, ensuring uniform force distribution and avoiding deviation or offset problems caused by concentrated pressure at a single point. The clamping components consist of support rods, brackets, and chains, driven by a motor to continuously and stably transport the metal tube. The hinge and adjustment mechanisms allow for flexible adjustment of the chain clamping distance, adapting to precision metal tubes of different outer diameters without frequent tooling changes. The overall encircling chain layout increases the effective clamping contact area, ensuring smooth and continuous transport without slippage or swaying. This structural improvement enhances the straightness and continuity of tube feeding, overcoming the shortcomings of traditional conveying devices such as small clamping coverage, easy deviation, and poor versatility.

[0019] 2. This precision metal tube processing feeding device has a rubber pad fixedly installed on the chain link, and a metal patch is set on the surface of the rubber pad. When the chain contacts and presses against the outer wall of the metal tube, the rubber pad can automatically undergo elastic deformation with the outer diameter of the tube, and at the same time drive the metal patch to bend and conform to the shape, perfectly fitting the arc outer wall contour of the metal tube. Unlike the drawbacks of traditional single rubber surface rigid contact that cannot conform to the shape, this composite structure uses the flexible buffer of rubber to avoid scratching the surface of the precision metal tube, and uses the rigid support of the metal patch to improve the friction contact stiffness, which greatly improves the friction coefficient of the contact surface. Relying on the large-area contact friction force after deformation and bonding, the tube is smoothly propelled, effectively solving the industry problem of low friction and easy slippage of smooth metal tube surface. At the same time, the combination of rubber pad and metal patch has stronger wear resistance and a service life far longer than ordinary rubber pad layer.

[0020] 3. This precision metal tube processing feeding device is equipped with suction cup mechanisms on some chain links, forming a double anti-slip guarantee with the chain friction conveying. The rubber suction cups move synchronously with the chain, and automatically discharge internal air to form negative pressure adsorption when they come into contact with and squeeze the outer wall of the metal tube, firmly adhering to the outer wall of the tube to achieve limit locking. When the suction cups move to the end of the station with the chain, the internal one-way mechanism and negative pressure amplification mechanism work together to achieve automatic air replenishment and pressure relief, completing automatic release and detachment without manual intervention. This makes up for the shortcomings of traditional friction conveying without auxiliary limit adsorption. It can maintain accurate feeding even under high-speed conveying, large-diameter tube and smooth tube wall conditions, and eliminate problems such as slippage, inaccurate feeding distance and disordered cycle, significantly improving the precision of fixed length processing of precision metal tubes.

[0021] 4. The suction cup mechanism of this precision metal tube processing feeder is equipped with a telescopic tube and a compensating spring to form a compensation structure, which can adapt to the vibration of chain operation and the slight dimensional deviation of the tube, ensuring the stability of the rubber suction cup. Combined with the exhaust ring, air blocking plate, and return spring, it forms a one-way mechanism to realize the one-way conduction logic of extrusion exhaust and return air replenishment, preventing negative pressure leakage. At the same time, the air cavity, exhaust cavity, and toothed disc meshing suction structure form a negative pressure amplification mechanism. Small mechanical movements can generate stable negative pressure suction. The entire internal mechanical linkage does not require an external vacuum source. The pure mechanical structure realizes automatic adsorption and automatic pressure release. The structure is compact, has a low failure rate, and is suitable for harsh processing conditions. Compared with the external vacuum suction cup structure, it has lower cost, simpler layout, and easier maintenance.

[0022] 5. This precision metal tube processing feeding device is modularly composed of an outer frame, multiple clamping components, a chain drive mechanism, a friction mechanism, and a suction cup mechanism. The logic of each component is clear, and power is uniformly provided by a drive motor. The adjustment mechanism can quickly adapt to different pipe diameters and different conveying pressure requirements. The equipment can automatically complete the entire process of feeding and clamping, chain friction propulsion, suction cup adsorption and limiting, and automatic release at the end. No manual calibration or manual assistance is required. Compared with the problems of traditional feeding devices that are fragmented, rely on manual adjustment, and have disjointed processes, this device has a high degree of integration and stable operating rhythm. It can be matched with multiple precision metal tube processing processes such as cutting, turning, and grinding. It has strong continuous production capabilities, effectively reduces labor costs, and improves overall processing efficiency and finished product qualification rate. Attached Figure Description

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a precision metal tube processing feeding device proposed in this invention; Figure 2 for Figure 1 Detailed schematic diagram of the structure after removing the outer frame; Figure 3 for Figure 2 A detailed enlarged structural diagram of one of the clamping components; Figure 4 for Figure 3 Detailed schematic diagram of the structure after rotation at a certain angle; Figure 5 for Figure 4 Enlarged schematic diagram of the central support and material strip; Figure 6 for Figure 6 Enlarged schematic diagram of the middle link and other components on the link; Figure 7 for Figure 6 Detailed enlarged structural diagram of the central suction cup mechanism; Figure 8 for Figure 7 Detailed cross-sectional structural diagram; Figure 9 for Figure 8 Detailed enlarged structural diagram of section A; Figure 10 for Figure 8 Detailed schematic diagram of the structure after rotation at a certain angle; Figure 11 for Figure 10 Detailed enlarged structural diagram of section B; Figure 12 for Figure 10 A detailed enlarged schematic diagram of the one-way mechanism after it has rotated a certain angle. Figure 13 for Figure 12 Detailed schematic diagram of the structure after rotation at a certain angle.

[0024] In the diagram: 1. Outer frame, 2. Clamping assembly, 3. Metal tube, 4. Support rod, 5. Elastic module, 6. Drive motor, 7. Chain, 8. Bracket, 9. Chain link, 10. Rubber pad, 11. Metal patch, 12. Suction cup mechanism, 13. Fixing tube, 14. Telescopic tube, 15. Fixing block, 16. Rubber suction cup, 17. Compensating spring, 18. Rubber disc, 19. Rod, 20. Column, 21. Fixing plate, 22. Wedge, 23. Pressing ball, 24. Fixing ring, 25. Hollow frame, 26. Ring body, 27. Spring coil, 28. One-way mechanism, 29. First gear disc, 30. Pull rope, 31. Air cavity, 32. Exhaust cavity, 33. One-way tube, 34. Piston disc, 35. Second gear disc, 36. Air outlet, 37. Exhaust ring, 38. Air blocking disc, 39. Circular ring, 40. Return spring, 41. Hook, 42. Chuck, 43. Hinge mechanism. Detailed Implementation

[0025] 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.

[0026] Example 1: Refer to Figures 1-5 A precision metal tube processing feeding device includes an outer frame 1 and a metal tube 3, and also includes multiple clamping assemblies 2 installed inside the outer frame 1; the clamping assembly 2 includes a support rod 4 fixedly installed inside the outer frame 1, a chain machine is mounted on the support rod 4 via a hinge mechanism 43, and an elastic module 5 cooperating with the chain machine is mounted on the support rod 4; the adjustment mechanism includes a driver fixedly installed on the support rod 4, and an elastic module 5 is installed between the driver and the bracket 8; The outer frame 1 serves as the main load-bearing and protective structure of the whole machine, providing a regular installation benchmark and overall protective space for multiple sets of clamping components 2 inside. The multiple sets of clamping components 2 are arranged in a surrounding manner inside the outer frame 1, which can form a multi-point circumferential clamping and conveying layout for the metal tube 3 from the circumference, completely changing the defect of the existing single and double chains 7 being prone to deviation due to single-point force. The clamping assembly 2 is fixedly mounted inside the outer frame 1 with the support rod 4 as the fixed support base. The support rod 4 is connected to the chain machine through the hinge mechanism 43, so that the chain machine can achieve adaptive fine adjustment of angle. At the same time, the support rod 4 is equipped with an elastic module 5, which can provide elastic buffer and pressure compensation for the chain machine. When it comes into contact with metal tubes 3 of different outer diameters, it automatically adapts the clamping gap to ensure that it is always in a close and tight state. The structure, through the interlocking of the outer frame 1, clamping assembly 2, support rod 4, hinge mechanism 43, and elastic module 5, achieves multiple sets of chains encircling, adjustable angle, and elastic adaptive clamping, resulting in uniform conveying force, strong versatility, and effectively avoiding the problems of conveying deviation, slippage, and scrambling of the metal tube 3.

[0027] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 1-6 The chain machine consists of a support 8 and a chain 7 rotatably mounted on the support 8. An adjustment mechanism is installed between the support rod 4 and the support 8. A drive motor 6 for driving the chain 7 to rotate is fixedly installed on the support rod 4. The chain 7 is spliced ​​together from many chain links 9. A friction mechanism is fixedly installed on some of the chain links 9. The friction mechanism includes a rubber pad 10 fixedly installed on the chain link 9 and a metal patch 11 fixedly installed on the rubber pad 10. The metal patch 11 abuts against the metal tube 3 to clamp the metal tube 3. The chain machine uses the support frame 8 as the supporting frame. The chain 7 is rotated and assembled on the support frame 8 to form a circulating conveying loop. The drive motor 6 fixed on the support rod 4 provides stable rotation power for the chain 7, driving many chain links 9 to circulate and operate continuously. The chain 7 is composed of multiple sets of standard chain links 9 spliced ​​together in sequence, with stable transmission and strong load-bearing capacity. A friction mechanism is fixedly assembled on some chain links 9, which is composed of rubber pads 10 and metal patches 11. When the chain 7 runs with the drive motor 6 and comes into contact with and presses against the outer wall of the metal tube 3, the rubber pads 10 can adapt to the deformation and bending of the outer arc of the tube by relying on their own elastic properties, and at the same time drive the metal patches 11 on the surface to conform to the contour of the tube wall. Compared to traditional single hard or ordinary rubber contact surfaces, this structure utilizes the combined advantages of flexible anti-scratch rubber pad 10 and rigid friction-enhancing metal patch 11 to significantly increase the contact friction area and friction coefficient. Structurally, it relies on mechanical friction to smoothly push the metal tube 3, effectively solving the drawbacks of smooth metal tube 3 being prone to idling and slipping, and unstable conveying.

[0028] Example 3: This example differs from Example 2 in that: (Refer to...) Figures 6-13 Another part of the chain link 9 is equipped with a suction cup mechanism 12, which includes a rubber suction cup 16 for adsorbing the metal tube 3 and reducing the probability of slippage when pushing the material by friction. The suction cup mechanism 12 also includes a fixing tube 13 fixedly installed on the chain link 9. A fixing block 15 is fixedly installed on the rubber suction cup 16. A compensation structure is installed between the fixing block 15 and the fixing tube 13. The fixing block 15 has a number of air outlet holes 36 that communicate with the rubber suction cup 16. The suction cup mechanism 12 is securely installed on the chain link 9 via the fixing tube 13, so that the whole can operate synchronously with the chain 7. The bottom of the rubber suction cup 16 is fixedly connected to the fixing block 15. A compensation structure is assembled between the fixing block 15 and the fixing tube 13, which can adapt to the vibration of the chain 7, the slight difference in the outer diameter of the tube, and the assembly gap error, so as to always ensure the stable contact posture of the rubber suction cup 16. Multiple sets of air vents 36 are opened on the fixed block 15 and are connected to the inner cavity of the rubber suction cup 16. When squeezed, air can be smoothly discharged through the air vents 36 to ensure rapid negative pressure molding. The entire set of fixed tube 13, fixed block 15, air vents 36 and compensation structure work together to achieve reliable installation and positioning of suction cup mechanism 12, and ensure smooth exhaust and adaptive fit. This avoids adsorption failure due to loose assembly or tilted posture, and continuously and stably plays the role of anti-slip limiting. The rubber suction cup 16, as the core adsorption component, moves synchronously with the chain 7. When it reaches the position where it is in contact with the outer wall of the metal tube 3, it automatically discharges the air in the inner cavity by mechanical extrusion to form a negative pressure adsorption effect, which assists in positioning and limiting the metal tube 3. In the case where slippage is likely to occur when pushing by friction mechanism alone, the suction cup mechanism 12 can form a dual guarantee of friction conveying + negative pressure adsorption. The adsorption constraint force of the rubber suction cup 16 restricts the circumferential sliding and axial movement of the metal tube 3, making up for the shortcomings of insufficient friction driving force. This structure requires no external vacuum negative pressure equipment. It generates adsorption force through purely mechanical follow-up extrusion. It has a simple layout, good following ability, and can limit the metal tube 3 in real time throughout the process to prevent slippage, which significantly improves the stability and feeding accuracy of feeding and conveying.

[0029] The compensation structure includes a telescopic tube 14 that is fixedly installed on and connected to the fixed tube 13. A compensation spring 17 is sleeved on the outside of the telescopic tube 14. An air outlet 36 is connected to the inside of the telescopic tube 14. A one-way mechanism 28 is installed inside the telescopic tube 14. A negative pressure amplification mechanism is installed between the rubber suction cup 16 and the fixed block 15. The compensation structure consists of a telescopic tube 14 and an external compensation spring 17. The telescopic tube 14 is fixed on the fixed tube 13 and internally connected, enabling axial telescopic displacement. The compensation spring 17 provides elastic preload, which can buffer the vibration of the chain 7 during operation and adapt to different contact distances of the metal tube 3, so that the rubber suction cup 16 always maintains a moderately pressed state. The air outlet 36 is connected to the inside of the telescopic tube 14 to form an exhaust and air replenishment channel. The telescopic tube 14 is equipped with a one-way mechanism 28 to control the unidirectional flow of air and prevent negative pressure backflow and leakage. At the same time, a negative pressure amplification mechanism is set between the rubber suction cup 16 and the fixed block 15, which can amplify the negative pressure suction of the inner cavity under small mechanical deformation. The components cooperate with each other to realize multiple functions such as gap compensation, elastic buffering, unidirectional airflow control, and negative pressure enhancement, thereby improving the adsorption reliability and working condition adaptability of the suction cup mechanism 12.

[0030] The one-way mechanism 28 includes an exhaust ring 37 fixedly installed inside the telescopic tube 14. Multiple sliding columns are slidably installed through the exhaust ring 37. An air-blocking plate 38 that cooperates with the exhaust ring 37 is fixedly installed at the same end of the multiple sliding columns. A circular ring 39 is fixedly installed at the other end of the multiple sliding columns. Multiple return springs 40 are fixedly installed between the circular ring 39 and the exhaust ring 37. A lifting component that cooperates with the air-blocking plate 38 is installed on the fixed tube 13. The one-way mechanism 28 uses the exhaust ring 37 as a fixed base, and multiple sliding columns slide through the exhaust ring 37. One end is linked to the air-blocking plate 38, and the other end is connected to the ring 39. A return spring 40 is arranged between the ring 39 and the exhaust ring 37. Under normal conditions, the air-blocking plate 38 is pressed against and sealed to the exhaust ring 37 by the spring force. When the rubber suction cup 16 is squeezed and vents air, the airflow pushes the air-blocking plate 38 down to open the channel, and the air is discharged smoothly; when the squeezing condition is lifted, the return spring 40 drives the ring 39, the sliding column and the air-blocking plate 38 to reset and block the channel, locking the internal negative pressure. Meanwhile, the lifting component on the fixed tube 13 can lift the air blocking plate 38 in conjunction with the designated work position, automatically replenishing air and releasing pressure, realizing fully mechanical control of adsorption, pressure holding and automatic release. The overall structure is precisely matched, and the one-way sealing is reliable, which can effectively prevent negative pressure leakage and ensure stable adsorption of the suction cup to prevent slippage.

[0031] The lifting component includes multiple hooks 41 fixedly installed on the air baffle plate 38, and a fixing ring 24 fixedly installed inside the fixing tube 13. A hollow frame 25 is rotatably installed on the fixing ring 24, and a rod 19 is slidably installed on the hollow frame 25. A chuck 42 that cooperates with the multiple hooks 41 is fixedly installed at the end of the rod 19. A driving component is installed between the bracket 8, the hollow frame 25 and the rod 19. The lifting component is fixedly linked to the air baffle plate 38 via the hook 41. The fixing ring 24 is securely mounted inside the fixing tube 13, providing rotational support for the hollow frame 25. The hollow frame 25 can rotate around the fixing ring 24 at a fixed point. The rod 19 is slidably mounted on the hollow frame 25 and can slide axially. The end chuck 42 can precisely engage and link with multiple hooks 41. When the chain 7 reaches the end of the loosening station, the mechanical structure of the station triggers the rotation of the hollow frame 25, which drives the rod 19 and chuck 42 to move. The pull hook 41 simultaneously lifts the air-blocking plate 38, opens the exhaust channel to replenish air and release pressure, so that the rubber suction cup 16 releases negative pressure and automatically detaches from the metal tube 3. The transmission of each component is precise and coordinated. No additional electric air source is required. The automatic loosening can be completed by triggering the pure mechanical station. The structure is simple and the action is reliable, realizing the automatic matching of adsorption and loosening sequence.

[0032] The driving component includes an arc-shaped spring plate fixedly installed inside the bracket 8; a rubber disc 18 that mates with the arc-shaped spring plate is fixedly installed at the end of the rod 19 away from the chuck 42; multiple wedges 22 are fixedly installed on the rubber disc 18; multiple pressure balls 23 that mate with the wedges 22 are rolled on the fixed tube 13; multiple columns 20 are fixedly installed on the hollow frame 25; a ring 26 is slidably installed on the multiple columns 20; and a spring coil 27 is fixedly installed between the ring 26 and the rod 19. The driving component uses the bow-shaped spring plate inside the bracket 8 as the sensing triggering component. The rear end of the rod 19 is fixed with a rubber disc 18 and multiple sets of wedges 22 are provided on the outside. Rollable pressure balls 23 are arranged on the fixed tube 13. During operation, the wedges 22 and the pressure balls 23 contact and cooperate in sequence to generate circumferential thrust, which drives the rubber disc 18 and the rod 19 to rotate slightly. The hollow frame 25 is slidably assembled with the ring 26 supported by the column 20. The ring 26 and the rod 19 are connected by a spring coil 27, which plays a role in resetting energy storage and buffering shock absorption. The entire drive component uses mechanical contour matching to achieve powerless triggering. Relying on the slope transmission of the wedge block 22 and the pressure ball 23, the rod 19 is driven to move precisely. With the help of the bow-shaped spring plate and the spring coil 27, automatic reset is achieved. The structure is ingeniously linked, and no additional drive of motor cylinder is required, which simplifies the control of the whole machine and reduces the failure rate.

[0033] The negative pressure amplification mechanism includes multiple air chambers 31 and multiple exhaust chambers 32 opened inside the fixed block 15. Each exhaust chamber 32 is connected to the corresponding air chamber 31 and the air outlet 36. Each exhaust chamber 32 is fixedly installed with a one-way tube 33. Each air chamber 31 is connected to the inside of the rubber suction cup 16. Multiple suction structures that cooperate with the corresponding air chambers 31 are installed between the rubber suction cup 16 and the fixed block 15. The negative pressure amplification mechanism has multiple air chambers 31 and exhaust chambers 32 inside the fixed block 15. The chambers are independent of each other and correspond one to one. One end of the exhaust chamber 32 is connected to the air chamber 31 and the other end is connected to the air outlet 36. A one-way pipe 33 is installed inside the exhaust chamber 32 to realize one-way airflow, allowing only outward exhaust and preventing backflow of air. The air cavity 31 is directly connected to the inner cavity of the rubber suction cup 16. When squeezed, the air inside the rubber suction cup 16 is smoothly discharged through the air cavity 31, the exhaust cavity 32, the one-way pipe 33, and the air outlet 36. The multi-cavity expansion structure increases the air discharge volume, thereby amplifying the negative pressure intensity of the inner cavity. The cavity layout is compactly integrated inside the fixing block 15 without occupying external space. The adsorption negative pressure is enhanced by the multi-cavity diversion expansion principle, which strengthens the limiting and anti-slip effect on the metal tube 3.

[0034] The suction structure includes a first roller and a second roller rotatably mounted on a fixed block 15. A first toothed disc 29 is fixedly mounted on the first roller, and a spring ring is fixedly mounted between the first toothed disc 29 and the fixed block 15. A second toothed disc 35 is fixedly mounted on the second roller. The first toothed disc 29 and the second toothed disc 35 mesh with each other, and the size of the first toothed disc 29 is larger than the size of the second toothed disc 35. A fixing plate 21 is fixedly mounted on the side arm of the rubber suction cup 16. A pull rope 30 is fixedly mounted on the fixing plate 21. The end of the pull rope 30 away from the fixing plate 21 is wound around the first roller. A rope body is wound around the second roller. A piston disc 34 is fixedly mounted on the end of the rope body away from the first roller. The piston disc 34 is slidably mounted inside the air cavity 31. The suction structure is the core linkage component of the negative pressure amplification mechanism. The first and second wire rollers are rotatably mounted on the fixed block 15. They are driven by the meshing of the first toothed disc 29 and the second toothed disc 35. The large and small toothed discs form a transmission effect of deceleration, torque increase and stroke amplification. The side arm of the rubber suction cup 16 is connected to the pull rope 30 through the fixing plate 21. The pull rope 30 is wound on the first roller. When the rubber suction cup 16 is deformed by pressure, the pull rope 30 is pulled to drive the first toothed disc 29 to rotate. Through meshing transmission, the second toothed disc 35 is driven to rotate faster. The winding rope body drives the piston disc 34 to slide and suck air in the air cavity 31. The spring ring enables the automatic reset of the gear plate mechanism. The entire structure utilizes the mechanical gear plate multiplier transmission to achieve large-stroke piston suction with a small shape change, which greatly improves the negative pressure generation capacity of the air cavity 31, further strengthens the adsorption force of the rubber suction cup 16, and stably restricts the metal tube 3 from slipping or deviating.

[0035] The specific operating steps of this device are as follows: First, place the metal tube 3 to be processed inside the outer frame 1 so that the outer frame 1 wraps around the metal tube 3, and then lock the outer frame 1. Next, the driver is started. The driver pushes the elastic module 5 to move (the elastic module 5 is existing technology, which can dynamically adjust the position of the bracket 8 to elastically clamp the metal tube 3), thereby moving the bracket 8 and making the bracket 8 rotate around the hinge mechanism 43, so that multiple brackets 8 converge towards the center and the metal patch 11 abuts against the metal tube 3. Next, start the drive motor 6. The drive motor 6 will drive the chain 7 to rotate on the bracket 8, thereby driving the metal patch 11 to rotate. The metal patch 11 will drive the metal tube 3 to move through friction, thereby realizing the feeding of the metal tube 3. Because the metal tubes 3 are of different sizes, the rubber pad 10 will deform when it comes into contact with the metal tubes 3, thereby causing the metal patch 11 to deform, ensuring that the metal patch 11 is completely in contact with the metal tubes 3, and increasing the friction by increasing the contact area. After the metal patch 11 comes into contact with the metal tube 3, the rubber suction cup 16 will also come into contact with the metal tube 3. Under the pressure, the air inside the rubber suction cup 16 will be discharged through the air outlet 36 and the fixing tube 13, making the inside of the rubber suction cup 16 negative pressure, which will have an adsorption effect on the metal tube 3 and effectively prevent slippage. During the exhaust process, the airflow will impact the air blocking plate 38, causing the air blocking plate 38 to separate from the exhaust ring 37. The air inside the rubber suction cup 16 will be discharged through the gap between the air blocking plate 38 and the exhaust ring 37. At this time, the sliding column will drive the ring 39 to move, causing the return spring 40 to be compressed. When the rubber suction cup 16 moves to the horizontal section, the squeezing force is reduced to zero. At this time, no exhaust will be performed. Under the action of the return spring 40, the air blocking plate 38 and the exhaust ring 37 will be sealed. When the rubber suction cup 16 moves close to the end of the bracket 8, the rubber disc 18 will abut against the bow-shaped spring sheet on the bracket 8, causing the bow-shaped spring sheet to deform. At the same time, the rubber disc 18 will also deform slightly. At this time, the huge friction between the bow-shaped spring sheet and the rubber disc 18 will cause the rubber disc 18 to rotate, thereby driving the rod 19 to rotate. Under the action of wedge 22 and pressing ball 23, the pressing ball 23 will abut against wedge 22 when it rotates. Since wedge 22 is conical, it will drive rubber disc 18 to move axially, thereby driving rod 19 to move. The movement of rod 19 will drive chuck 42 to move, thereby driving hook 41 to move. Hook 41 will drive air blocking disc 38 to move, causing air blocking disc 38 to separate from exhaust ring 37. At this time, the external air pressure is less than the air pressure in rubber suction cup 16, so external air will be drawn into rubber suction cup 16 through fixed pipe, exhaust ring 37 and air outlet 36 to replenish negative pressure in rubber suction cup 16, thereby releasing negative pressure in rubber suction cup 16 and allowing rubber suction cup 16 to detach smoothly from metal tube 3. After rubber disc 18 separates from spring plate, rod 19 will be reset under the action of spring coil 27. Since the deformation of the rubber suction cup 16 is fixed when it abuts against the metal tube 3, the exhaust volume is also fixed. Therefore, a negative pressure amplification mechanism is designed to increase the exhaust volume and improve the negative pressure adsorption effect. Its specific operation is as follows: As the rubber suction cup 16 deforms, it causes the fixing plate 21 to move outwards. This movement, via the pull rope 30, drives the first roller to rotate. The rotation of the first roller drives the first toothed disc 29 to rotate, which in turn drives the second toothed disc 35 to rotate. Since the size of the first toothed disc 29 is larger than that of the second toothed disc 35, the second roller rotates more times than the first roller. Therefore, the displacement of the rope is greater than the displacement of the pull rope 30, thereby increasing the displacement of the piston disc 34 and allowing it to suck away more air. The upward movement of the piston disc 34 within the air cavity 31 creates a negative pressure within the air cavity 31, drawing air from the rubber suction cup 16 into the air cavity 31. This increases the amount of air discharged from the rubber suction cup 16 and enhances the negative pressure adsorption strength. During the recovery phase, the piston disc 34 falls back. To accelerate air replenishment, external air is drawn into the air cavity 31 through the one-way pipe 33 within the exhaust cavity 32 and then replenished into the rubber suction cup 16.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A feeding device for precision metal tube processing, comprising an outer frame (1) and a metal tube (3), characterized in that, It also includes multiple sets of clamping components (2) installed inside the outer frame (1); The clamping assembly (2) includes a support rod (4) fixedly installed inside the outer frame (1), and a chain machine is mounted on the support rod (4) via a hinge mechanism (43); The chain machine consists of a support (8) and a chain (7) rotatably mounted on the support (8). An adjustment mechanism is installed between the support rod (4) and the support (8). A drive motor (6) for driving the chain (7) to rotate is fixedly installed on the support rod (4). The chain (7) is spliced ​​together from a number of chain links (9). A friction mechanism is fixedly installed on a portion of the chain links (9), and a suction cup mechanism (12) is installed on another portion of the chain links (9). The friction mechanism includes a rubber pad (10) fixedly mounted on the chain link (9) and a metal patch (11) fixedly mounted on the rubber pad (10). The metal patch (11) abuts against the metal tube (3) to clamp the metal tube (3). The suction cup mechanism (12) includes a rubber suction cup (16) for adsorbing the metal tube (3) and reducing the probability of slippage when pushing the material by friction.

2. The feeding device for precision metal tube processing according to claim 1, characterized in that, The adjustment mechanism includes a driver fixedly mounted on the support rod (4), and an elastic module (5) is installed between the driver and the bracket (8).

3. The feeding device for precision metal tube processing according to claim 1, characterized in that, The suction cup mechanism (12) also includes a fixed tube (13) fixedly installed on the chain link (9), a fixed block (15) fixedly installed on the rubber suction cup (16), a compensation structure is installed between the fixed block (15) and the fixed tube (13), and a number of air outlet holes (36) connected to the rubber suction cup (16) are opened on the fixed block (15).

4. The feeding device for precision metal tube processing according to claim 3, characterized in that, The compensation structure includes a telescopic tube (14) that is fixedly installed on the fixed tube (13) and connected to the fixed tube (13). A compensation spring (17) is sleeved on the outside of the telescopic tube (14). The air outlet (36) is connected to the inside of the telescopic tube (14). A one-way mechanism (28) is installed inside the telescopic tube (14). A negative pressure amplification mechanism is installed between the rubber suction cup (16) and the fixed block (15).

5. The feeding device for precision metal tube processing according to claim 4, characterized in that, The one-way mechanism (28) includes an exhaust ring (37) fixedly installed inside the telescopic tube (14). Multiple sliding columns are slidably installed through the exhaust ring (37). At the same end of the multiple sliding columns, an air-blocking plate (38) that cooperates with the exhaust ring (37) is fixedly installed. At the other end of the multiple sliding columns, a ring (39) is fixedly installed. Multiple return springs (40) are fixedly installed between the ring (39) and the exhaust ring (37). A lifting component that cooperates with the air-blocking plate (38) is installed on the fixed tube (13).

6. The feeding device for precision metal tube processing according to claim 5, characterized in that, The lifting component includes multiple hooks (41) fixedly installed on the air baffle (38) and a fixing ring (24) fixedly installed inside the fixing tube (13). A hollow frame (25) is rotatably installed on the fixing ring (24), and a rod (19) is slidably installed on the hollow frame (25). A chuck (42) that cooperates with the multiple hooks (41) is fixedly installed at the end of the rod (19). A driving component is installed between the bracket (8), the hollow frame (25) and the rod (19).

7. The feeding device for precision metal tube processing according to claim 6, characterized in that, The driving component includes an arc-shaped spring plate fixedly installed inside the bracket (8), and a rubber disc (18) cooperating with the arc-shaped spring plate is fixedly installed at the end of the rod (19) away from the chuck (42). Multiple wedges (22) are fixedly installed on the rubber disc (18), and multiple pressure balls (23) cooperating with the wedges (22) are rolled on the fixed tube (13). Multiple columns (20) are fixedly installed on the hollow frame (25), and a ring (26) is slidably installed on the multiple columns (20). A spring coil (27) is fixedly installed between the ring (26) and the rod (19).

8. The feeding device for precision metal tube processing according to claim 4, characterized in that, The negative pressure amplification mechanism includes multiple air chambers (31) and multiple exhaust chambers (32) opened inside the fixed block (15). Each exhaust chamber (32) is connected to the corresponding air chamber (31) and the air outlet (36). A one-way tube (33) is fixedly installed in each exhaust chamber (32). Each air chamber (31) is connected to the inside of the rubber suction cup (16). Multiple suction structures that cooperate with the corresponding air chambers (31) are installed between the rubber suction cup (16) and the fixed block (15).

9. The feeding device for precision metal tube processing according to claim 8, characterized in that, The suction structure includes a first roller and a second roller rotatably mounted on a fixed block (15). A first toothed disc (29) is fixedly mounted on the first roller. A spring ring is fixedly mounted between the first toothed disc (29) and the fixed block (15). A second toothed disc (35) is fixedly mounted on the second roller. The first toothed disc (29) and the second toothed disc (35) mesh with each other, and the size of the first toothed disc (29) is larger than the size of the second toothed disc (35). A fixing plate (21) is fixedly mounted on the side arm of the rubber suction cup (16). A pull rope (30) is fixedly mounted on the fixing plate (21). The end of the pull rope (30) away from the fixing plate (21) is wound around the first roller. A rope body is wound around the second roller. A piston disc (34) is fixedly mounted on the end of the rope body away from the first roller. The piston disc (34) is slidably mounted inside the air cavity (31).

10. A feeding method for precision metal tube machining, used in the feeding device for precision metal tube machining as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. First, place the metal tube (3) to be processed inside the outer frame (1) so that the outer frame (1) wraps the metal tube (3) and then lock the outer frame (1). S2. Next, adjust the position of the bracket (8) by adjusting the mechanism so that the metal patch (11) abuts against the metal tube (3). Then start the drive motor (6). The drive motor (6) will drive the chain (7) to rotate on the bracket (8), thereby driving the metal patch (11) to rotate. The metal patch (11) will drive the metal tube (3) to move through friction, thereby realizing the feeding of the metal tube (3). Since the metal tube (3) has different sizes, the rubber pad (10) will deform when it abuts against the metal tube (3), thereby driving the metal patch (11) to deform, ensuring that the metal patch (11) and the metal tube (3) are completely attached, thereby increasing the friction by increasing the contact area. S3. After the friction mechanism comes into contact with the metal tube (3), the rubber suction cup (16) in the suction cup mechanism (12) will also come into contact with the metal tube (3). Under the pressure, the air inside the rubber suction cup (16) will be discharged, making the inside of the rubber suction cup (16) negative pressure, which will adsorb the metal tube (3) and effectively prevent slippage. When the rubber suction cup (16) moves close to the end of the bracket (8), the internal operation of the suction cup mechanism (12) will replenish the air inside the rubber suction cup (16), thereby releasing the negative pressure inside the rubber suction cup (16) and allowing the rubber suction cup (16) to detach smoothly from the metal tube (3).

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