Drawing equipment for copper strip processing and method thereof

Abstract

The invention discloses stretching equipment for copper strip processing and a method thereof, and relates to the field of copper strip processing. The stretching equipment for copper strip machining comprises an uncoiler, a straightening machine, a plurality of stretching machines, a coiling machine and a control machine, and each stretching machine comprises a stretching unit, a lubricating unit and a monitoring unit. According to the stretching equipment for copper strip processing and the method thereof, the temperature and the thickness of the stretched copper strip are measured through the monitoring unit, then the corresponding stretching method is designed, in the method, the pressure, the speed and the lubricant amount serve as variables, meanwhile, the temperature value and the thickness value of the copper strip are combined, and a corresponding nonlinear coupling model is designed; a corresponding control system is arranged in a control machine to execute the method, so that when the copper strip is stretched by a plurality of stretching machines, the pressure, the speed and the lubricant amount can be adaptively adjusted according to the thickness and the temperature of the stretched copper strip, and a final finished product meets the requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of copper strip processing, and specifically to a stretching device and method for copper strip processing. Background Art

[0002] During the stretching process of copper strips, usually a whole roll of copper strip is unrolled by an uncoiler, straightened by a straightener, and then the copper strip passes through multiple stretching machines in sequence. Under the influence of pressure and roller pressing speed, the copper strip is gradually stretched, and at the same time, the thickness of the copper strip decreases during this process, and finally the thickness of the copper strip meets the usage requirements. Finally, it is wound up and cut by a coiler.

[0003] However, in the existing technical solutions, usually the pressure and roller pressing speed during the stretching process of the copper strip are adjusted and controlled according to the material ratio of the copper strip (the material ratio determines the hardness, ductility, thermal conductivity, plasticity and other conditions affecting stretching) so that the copper strip can be continuously stretched according to the preset plan. However, during the actual stretching process, affected by the actual specific conditions such as the uniformity of the copper strip composition, the pressure consistency of the pressure rollers, the thickness consistency of the copper strip, the addition amount of lubricant, and the external temperature, the stretching effect of the copper strip cannot be exactly the same as the preset plan, there are certain deviations, resulting in the problem of uneven thickness in the final product of the whole roll of copper strip. Therefore, a stretching device and method for copper strip processing are provided specifically to solve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a stretching device and method for copper strip processing, which solves the problem that the existing copper strip stretching device usually adjusts and controls the speed and pressure during the stretching process of the copper strip according to the material ratio of the copper strip. However, affected by various actual factors, there are defects in the final product.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A stretching device for copper strip processing includes an uncoiler, a straightener, multiple stretching machines, a coiler, and a controller for collaborative control, which are connected in sequence. The stretching machine includes;

[0006] A stretching unit, in which a movable pressure roller and a fixed pressure roller are provided. Hydraulic cylinders are installed at the top of both ends of the movable pressure roller for adjusting the pressure between the two ends of the movable pressure roller and the fixed pressure roller, and variable frequency motors for driving are respectively installed on the movable pressure roller and the fixed pressure roller;

[0007] A lubrication unit, which includes an oil filling component provided on the feeding side of the stretching unit and an oil scraping component provided on the discharging side of the stretching unit. A variable frequency pump is installed on the oil filling component, and a lubricating oil circulation and filtration tank is installed between the oil filling component and the oil scraping component for lubricating oil circulation and filtration;

[0008] A cleaning and polishing unit, which is installed on the stretching unit and is used for automatic polishing and surface impurity cleaning when the movable pressing roller and the fixed pressing roller rotate;

[0009] A monitoring unit, which is installed on the discharging side of the stretching unit. By monitoring the thickness and temperature of the copper strip after stretching, it controls the hydraulic cylinder, the frequency conversion motor and the frequency conversion pump to adjust the pressure, speed and lubricant addition amount.

[0010] Preferably, the stretching unit includes a frame and a motor controller installed on one side of the frame. The movable pressing roller and the fixed pressing roller are both controlled and connected to the motor controller;

[0011] An N-shaped frame is movably arranged at the top inside the frame. The movable pressing roller is rotatably connected in the N-shaped frame. The hydraulic cylinder is fixedly arranged at the top of the frame, and its output shaft is movably hinged to the N-shaped frame.

[0012] Preferably, a coolant circulating machine is arranged on one side of the frame. Cooling channels are respectively installed inside the movable pressing roller and the fixed pressing roller. The coolant circulating machine is respectively connected to the two groups of cooling channels to circulate and cool the movable pressing roller and the fixed pressing roller.

[0013] Preferably, the number of the cleaning and polishing units is two groups. One group of the cleaning and polishing units is installed on the N-shaped frame, and the other group of the cleaning and polishing units is installed at the bottom inside the frame;

[0014] The cleaning and polishing unit includes a contact cover and a plurality of scrapers fixedly arranged inside the contact cover. Contact ports and slag discharge ports are respectively opened on both sides of the contact cover. A slag receiving box is installed on the outer wall of the slag discharge port through bolts;

[0015] Both sides of the scraper are respectively located in the contact port and the slag discharge port, and the side of the scraper facing the slag discharge port is inclined downward; the plurality of scrapers are arranged at intervals so that an inclined downward slag discharge channel is formed between the plurality of scrapers.

[0016] Preferably, the oil filling assembly includes a fixed oil filling seat and a movable oil filling seat; the oil scraping assembly includes a fixed oil scraping seat and a movable oil scraping seat;

[0017] Densely arranged injection nozzles are installed in the middle of the opposite sides of the fixed oil filling seat and the movable oil filling seat. There are two groups of frequency conversion pumps, which are respectively fixedly arranged between the two groups of injection nozzles and the lubricating oil circulation and filtration tank;

[0018] On the middle parts of the opposite sides of the fixed oil scraping seat and the movable oil scraping seat, a lower oil scraping part and an upper oil scraping part are respectively arranged, and both the upper oil scraping part and the lower oil scraping part are made of flexible materials; the lower oil scraping part and the upper oil scraping part respectively scrape the upper and lower sides of the copper strip and enable the lubricating oil to enter the inside of the fixed oil scraping seat; a reflux pump is installed between the inner bottom of the fixed oil scraping seat and the lubricating oil circulation and filtration tank;

[0019] The monitoring unit is fixedly installed on the fixed oil scraping seat and the movable oil scraping seat.

[0020] Preferably, connecting hanging strips are fixedly arranged on both sides of the movable oil filling seat and the movable oil scraping seat. A chute is opened on the inner side wall of the frame, and an elastic member is fixedly arranged at the inner bottom of the chute. The top end of the elastic member is fixedly connected to the inner side of the top end of the connecting hanging strip. A pressing rod is arranged at the outer top of the connecting hanging strip, and the pressing rod is fixedly connected to the N-shaped frame.

[0021] Preferably, the monitoring unit includes fixed brackets fixedly arranged on the outer walls of the fixed oil scraping seat and the movable oil scraping seat. A plurality of infrared temperature sensors and laser ranging sensors are fixedly installed in the fixed brackets, and a plurality of reinforcing ribs are integrally formed on the fixed brackets.

[0022] Preferably, an oil collecting groove is opened at the top of the fixed oil scraping seat. The two sides of the oil collecting groove incline downward, and an oil hole communicating with the inside of the fixed oil scraping seat is opened at the end of the downward inclination; the lower oil scraping part is fixedly arranged in the middle of the oil collecting groove;

[0023] A plurality of vertical convex ribs are arranged at the top of the lower oil scraping part, and the heights of the plurality of convex ribs increase in a stepped manner along the direction away from the fixed pressure roller. The plurality of convex ribs are arranged at intervals so as to form oil drainage channels between two adjacent ones, and the two sides of the oil drainage channels incline downward;

[0024] The number and position of the upper oil scraping parts correspond one by one to those of the lower oil scraping parts, so that the upper oil scraping parts and the lower oil scraping parts support each other relatively to avoid contact extrusion and deformation of the copper strip;

[0025] The lower edge heights of multiple groups of the upper oil scraping parts decrease in a stepped manner along the direction away from the fixed pressure roller.

[0026] Preferably, the side of the upper oil scraping part facing the fixed pressure roller is recessed inward to form an oil drainage groove for the flow of the lubricating oil;

[0027] The middle part of the upper oil scraping part protrudes toward the fixed pressure roller side, so that the middle part of the upper oil scraping part is in a V shape. The two sides of the upper oil scraping part incline downward and extend into the inside of the oil collecting groove;

[0028] The bottom edge of the oil drainage groove in the middle of the upper oil scraping part inclines downward on both sides.

[0029] Preferably, the method for a stretching device for copper strip processing includes the following steps;

[0030] Step 1: Unroll the copper strip coil through an uncoiler, and then the copper strip enters the stretcher after being straightened by a straightener;

[0031] Step 2: Start the stretcher, add lubricant through a lubrication unit, and then rotate the pressure rollers for roll pressing and stretching;

[0032] Step 3: The laser distance sensor measures the thickness of the copper strip after stretching, and the infrared temperature sensor measures the temperature of the copper strip after stretching;

[0033] Step 4: Adjust the roll pressing speed, downward pressure, and lubricant addition amount according to the thickness and temperature of the copper strip;

[0034] Step 5: The rewind reel winds up the copper strip that has completed stretching;

[0035] In Step 4, preset thickness thresholds Hmax and Hmin; temperature thresholds Kmax and Kmin; and maximum thickness difference threshold Ha and maximum temperature difference threshold Ka;

[0036] Then, the laser distance sensor measures multiple-point thickness values H1, H2…Hn, and the infrared temperature sensor measures multiple-point temperature values K1, K2…Kn, and then analyzes the measured data;

[0037] Judge whether the multiple-point thickness is within the threshold range. If so, no action is taken; if not, proceed to the next judgment;

[0038] Judge whether the maximum thickness difference of multiple points is greater than Ha; if so, it is judged that the pressure is uneven, and at this time, increase the pressure on the side with the larger thickness through the hydraulic cylinder; if not, proceed to the next judgment;

[0039] Judge whether the multiple-point temperature is within the threshold range. If so, it is judged that the speed is too fast, and reduce the motor power. If not, proceed to the next judgment;

[0040] Judge whether the maximum temperature difference is greater than Ka; if so, it is judged that the lubricant is insufficient, and increase the lubricant amount; if not, it is judged that there are abnormalities in pressure, speed, and lubricant amount. At this time, set speed thresholds Vmax and Vmin; Pmax and Pmin based on the influencing factors restricted by the material change during the copper strip stretching process; and then perform adaptive adjustment based on the non-linear coupling model;

[0041]

[0042] Among them, the initial values are α = 0.05; β = 0.2; γ = 1.5; δ = 0.01; ε = 0.1;

[0043] Constraints: Vmin ≤ V ≤ Vmax; Pmin ≤ P ≤ Pmax; L > 0. Accordingly, the speed, pressure, and lubricant addition amount are dynamically and adaptively adjusted according to the target thickness difference to be adjusted.

[0044] The present invention discloses a stretching device and method for copper strip processing, and the beneficial effects thereof are as follows:

[0045] 1. For the stretching device and method for copper strip processing, by setting a stretching machine which includes a stretching unit, a lubrication unit, and a monitoring unit, the temperature and thickness of the stretched copper strip are measured by the monitoring unit. Then, by designing a corresponding stretching method, in this method, taking pressure, speed, and lubricant amount as variables, and combining the copper strip temperature and thickness values, a corresponding non-linear coupling model is designed. By setting a corresponding control system in the controller to execute this method, when the copper strip is stretched by multiple stretching machines, the pressure, speed, and lubricant amount can be adaptively adjusted according to the thickness and temperature of the stretched copper strip, so that the final product meets the requirements.

[0046] 2. For the stretching device for copper strip processing, by designing an oil scraping assembly in the lubrication unit, a lower oil scraping part is designed on a fixed oil scraping seat, and an upper oil scraping part is arranged on a movable oil scraping seat. The lower oil scraping part has multiple vertical convex edges distributed in a stepped manner. When actually scraping the lubricating oil, it can gradually scrape according to the thickness, avoiding the lubricating oil from accumulating and not being discharged downward in time due to one-time scraping, resulting in the overflow of the lubricating oil and causing pollution. At the same time, both sides of the oil discharge channels spaced by the multiple convex edges are inclined downward, so that the lubricating oil can be quickly discharged from both sides; also using a stepped combination for multi-layer gradual scraping of the lubricant, the middle part of the upper oil scraping part is V-shaped, and both ends extend downward and are inside the oil collecting tank, and the oil discharge groove formed by the front side being concave inward is for the lubricating oil to flow, and the middle of the inner bottom of the oil discharge groove is thick and both sides are thin, so that the lubricating oil can effectively and quickly move and be collected to both sides, thereby maximizing the avoidance of waste and pollution caused by the overflow of the lubricating oil during the lubricating oil recovery process.

[0047] 3. For the stretching method for copper strip processing, by collecting the temperatures and thicknesses at multiple points of the copper strip, and sequentially performing multi-point thickness interval judgment, thickness difference judgment, multi-point temperature interval judgment, and temperature difference judgment, and respectively adjusting the three single variables of pressure, speed, and lubricant amount according to the judgment results. In this judgment process, the thickness difference is not caused by a single variable of independent pressure, speed, or lubricant amount, but according to this thickness difference expressed by temperature, it is judged that under this working condition, the influence weight of the target variable is the largest. By simply adjusting the weight of this variable, the effect of correcting the data can be achieved, without adjusting multiple variables, reducing the adjustment difficulty and control cost. Brief Description of the Drawings

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0049] Figure 1 Schematic diagram of the overall outer surface structure of the stretching device of the present invention;

[0050] Figure 2 Schematic diagram of the overall feeding side structure of the stretching machine of the present invention;

[0051] Figure 3 Schematic diagram of the overall discharging side structure of the stretching machine of the present invention;

[0052] Figure 4 Exploded view of the internal structure of the stretching machine of the present invention;

[0053] Figure 5 Schematic diagram of the inner side wall structure of the stretching machine of the present invention;

[0054] Figure 6 Schematic diagram of the internal structure of the oil filling assembly of the present invention;

[0055] Figure 7 Schematic diagram of the inner top structure of the oil scraping assembly of the present invention;

[0056] Figure 8 Schematic diagram of the inner bottom structure of the oil scraping assembly of the present invention;

[0057] Figure 9 Schematic diagram of the outer surface structure of the lower oil scraping part of the present invention;

[0058] Figure 10 Schematic diagram of the outer surface structure of the upper oil scraping part of the present invention;

[0059] Figure 11 Schematic diagram of the outer surface structure of a single set of upper oil scraping parts of the present invention;

[0060] Figure 12 Cross-sectional view of the internal structure of the cleaning and polishing unit of the present invention;

[0061] Figure 13 Partial enlarged view of the structure of the upper oil scraping part of the present invention;

[0062] Figure 14 Flowchart of the stretching method of the present invention;

[0063] Figure 15 Flowchart for action judgment based on thickness and temperature in the stretching method of the present invention.

[0064] In the figure: 1. Uncoiler; 2. Straightener; 3. Stretch machine; 4. Rewinder; 5. Controller;

[0065] 31. Stretch unit; 32. Lubrication unit; 33. Cleaning and polishing unit; 34. Monitoring unit;

[0066] 311. Frame; 312. Movable pressure roller; 313. Fixed pressure roller; 314. Hydraulic cylinder; 315. Variable-frequency motor; 316. Motor controller; 317. N-shaped frame; 318. Coolant circulator;

[0067] 321. Oil filling assembly; 322. Oil scraping assembly; 323. Lubricating oil circulating and filtering tank; 324. Connecting hanging bar; 325. Elastic member; 326. Pressing rod;

[0068] 3211. Fixed oil filling base; 3212. Movable oil filling base; 3213. Oil injector; 3214. Variable-frequency pump;

[0069] 3221. Fixed oil scraping base; 3222. Movable oil scraping base; 3223. Upper oil scraping part; 3224. Lower oil scraping part; 3225. Oil collecting tank; 3226. Lower oil hole; 3227. Oil discharge groove;

[0070] 331. Contact cover; 332. Contact port; 333. Slag receiving box; 334. Scraper;

[0071] 341. Fixed bracket; 342. Infrared temperature sensor; 343. Laser distance sensor; 344. Reinforcing rib. Detailed implementation mode

[0072] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0073] By providing a stretching device and method for copper strip processing in the embodiments of the present application, the problem that existing copper strip stretching devices usually adjust and control the speed and pressure during the stretching process of copper strips according to the material ratio of copper strips, but due to various actual factors, defects exist in the final products is solved.

[0074] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation modes.

[0075] Embodiment 1

[0076] This embodiment discloses a stretching device for copper strip processing. According to the attached Figures 1-15 as shown in the figure, it includes an uncoiler 1, a straightener 2, multiple stretching machines 3, a coiler 4 connected in sequence, and a controller 5 for coordinated control. The stretching machine 3 includes;

[0077] A stretching unit 31. In the stretching unit 31, a movable pressure roller 312 and a fixed pressure roller 313 are arranged. Hydraulic cylinders 314 are installed at the top of both ends of the movable pressure roller 312 for adjusting the pressure between the two ends of the movable pressure roller 312 and the fixed pressure roller 313. Variable frequency motors 315 for driving are respectively installed on the movable pressure roller 312 and the fixed pressure roller 313;

[0078] The stretching unit 31 includes a frame 311 and a motor controller 316 installed on one side of the frame 311. The movable pressure roller 312 and the fixed pressure roller 313 are both connected to the motor controller 316 for control; an N-shaped frame 317 is movably arranged at the inner top of the frame 311. The movable pressure roller 312 is rotatably connected in the N-shaped frame 317. The hydraulic cylinder 314 is fixedly arranged at the top of the frame 311, and its output shaft is movably hinged to the N-shaped frame 317. A coolant circulation machine 318 is arranged on one side of the frame 311. Cooling channels are respectively installed inside the movable pressure roller 312 and the fixed pressure roller 313. The coolant circulation machine 318 is respectively connected to the two groups of cooling channels to circulate and cool the movable pressure roller 312 and the fixed pressure roller 313.

[0079] A lubrication unit 32, which includes an oil filling assembly 321 arranged on the feeding side of the stretching unit 31 and an oil scraping assembly 322 arranged on the discharging side of the stretching unit 31. A variable frequency pump 3214 is installed on the oil filling assembly 321. A lubricating oil circulation and filtration tank 323 is installed between the oil filling assembly 321 and the oil scraping assembly 322 for lubricating oil circulation and filtration;

[0080] The oil filling assembly 321 includes a fixed oil filling seat 3211 and a movable oil filling seat 3212; the oil scraping assembly 322 includes a fixed oil scraping seat 3221 and a movable oil scraping seat 3222;

[0081] Densely arranged spray nozzles 3213 are installed in the middle of the opposite sides of the fixed oil filling seat 3211 and the movable oil filling seat 3212. There are two groups of variable frequency pumps 3214, which are respectively fixedly arranged between the two groups of spray nozzles 3213 and the lubricating oil circulation and filtration tank 323;

[0082] On the middle parts of the opposite sides of the fixed oil scraping seat 3221 and the movable oil scraping seat 3222, a lower oil scraping member 3224 and an upper oil scraping member 3223 are respectively arranged. Both the upper oil scraping member 3223 and the lower oil scraping member 3224 are made of flexible materials. The lower oil scraping member 3224 and the upper oil scraping member 3223 respectively scrape the upper and lower sides of the copper strip and make the lubricating oil enter the inside of the fixed oil scraping seat 3221. A reflux pump is installed between the inner bottom of the fixed oil scraping seat 3221 and the lubricating oil circulation and filtration tank 323. A filter element is arranged inside the lubricating oil circulation and filtration tank 323. The lubricating oil scraped and collected is pumped to the filter element by the reflux pump to complete filtration, and then is pumped out through the variable-frequency pump 3214 for recycling.

[0083] On both sides of the movable oil filling seat 3212 and the movable oil scraping seat 3222, connecting hanging bars 324 are fixedly arranged. A chute is opened on the inner side wall of the frame 311, and an elastic member 325 is fixedly arranged at the inner bottom of the chute. The top end of the elastic member 325 is fixedly connected to the inner top end of the connecting hanging bar 324. A pressing rod 326 is arranged at the outer top of the connecting hanging bar 324. The pressing rod 326 is fixedly connected to the N-shaped frame 317. An oil collecting groove 3225 is opened at the top of the fixed oil scraping seat 3221. The two sides of the oil collecting groove 3225 are inclined downward, and an oil drain hole 3226 communicating with the inside of the fixed oil scraping seat 3221 is opened at the end of the downward inclination. The lower oil scraping member 3224 is fixedly arranged in the middle of the oil collecting groove 3225.

[0084] On the top of the lower oil scraping member 3224, a plurality of vertical convex edges are arranged, and the heights of the plurality of convex edges increase in a stepped manner along the direction away from the fixed pressure roller 313. The plurality of convex edges are arranged at intervals so as to form an oil drainage channel between every two of them, and the two sides of the oil drainage channel are inclined downward. The number, quantity and position of the upper oil scraping members 3223 correspond to those of the lower oil scraping members 3224 one by one, so that the number of the upper oil scraping members 3223 and the lower oil scraping members 3224 support each other relatively to avoid contact extrusion and deformation of the copper strip. The lower edge heights of the plurality of groups of upper oil scraping members 3223 decrease in a stepped manner along the direction away from the fixed pressure roller 313. On the side of the upper oil scraping member 3223 facing the fixed pressure roller 313, an inward depression is formed to form an oil drainage groove 3227 for the lubricating oil to flow. The middle part of the upper oil scraping member 3223 bulges toward the fixed pressure roller 313, so that the middle part of the upper oil scraping member 3223 is in a V shape. The two sides of the upper oil scraping member 3223 are inclined downward and extend into the inside of the oil collecting groove 3225. The bottom edge of the oil drainage groove 3227 in the middle of the upper oil scraping member 3223 is inclined downward on both sides.

[0085] A cleaning and polishing unit 33, which is installed on the stretching unit 31 and is used for automatic polishing and surface impurity cleaning when the movable pressing roller 312 and the fixed pressing roller 313 rotate; the number of the cleaning and polishing units 33 is two groups. One cleaning and polishing unit 33 is installed on the N-shaped frame 317, and the other group of cleaning and polishing units 33 is installed at the inner bottom of the frame 311; the cleaning and polishing unit 33 includes a contact cover 331 and a plurality of scraping blades 334 fixedly arranged inside the contact cover 331. Contact openings 332 and slag discharge openings are respectively formed on both sides of the contact cover 331. A slag receiving box 333 is installed on the outer wall of the slag discharge opening through bolts; both sides of the scraping blade 334 are respectively located in the contact opening 332 and the slag discharge opening, and the side of the scraping blade 334 facing the slag discharge opening is inclined downward; the plurality of scraping blades 334 are arranged at intervals so that an inclined downward slag discharge channel is formed between the plurality of scraping blades 334, so that during the rotation of the movable pressing roller 312 and the fixed pressing roller 313, the surfaces of the movable pressing roller 312 and the fixed pressing roller 313 are respectively cleaned of impurities by the scraping blades 334 in the two groups of cleaning and polishing units 33, and at the same time, the surfaces of the movable pressing roller 312 and the fixed pressing roller 313 are polished.

[0086] A monitoring unit 34, which is installed on the discharging side of the stretching unit 31. By monitoring the thickness and temperature of the copper strip after stretching, it controls the hydraulic cylinder 314, the frequency conversion motor 315 and the frequency conversion pump 3214 to adjust the pressure, speed and lubricant addition amount. The monitoring unit 34 is fixedly installed on the fixed oil scraping seat 3221 and the movable oil scraping seat 3222. The monitoring unit 34 includes a fixed bracket 341 fixedly arranged on the outer walls of the fixed oil scraping seat 3221 and the movable oil scraping seat 3222. A plurality of infrared temperature sensors 342 and laser distance sensors 343 are fixedly installed in the fixed bracket 341, and a plurality of reinforcing ribs 344 are integrally formed on the fixed bracket 341.

[0087] Working principle: When the device is in use, a whole roll of copper strip is installed on the uncoiler 1. After being uncoiled by the uncoiler 1, the copper strip enters the straightener 2 for straightening, and then the copper strip passes through a plurality of stretching machines 3 in sequence, and finally the copper strip is fixed on the coiler 4, and is cooperatively controlled by the controller 5;

[0088] At this time, the stretching machine 3 is started. First, the coolant circulation machine 318 is started to circulate and cool the coolant inside the movable pressing roller 312 and the fixed pressing roller 313. Then, the hydraulic cylinder 314 drives the N-shaped frame 317 to move downward, so that the movable pressing roller 312 approaches the fixed pressing roller 313. At the same time, during this process, the pressure rod 326 follows the downward movement of the N-shaped frame 317, so that the pressure rod 326 presses down on the movable oil adding seat 3212 and the movable oil scraping seat 3222, so that the movable oil adding seat 3212 is buckled on the top of the fixed oil adding seat 3211, and at the same time, the movable oil scraping seat 3222 is buckled on the top of the fixed oil scraping seat 3221;

[0089] At this time, the variable-frequency pump 3214 starts, and sprays oil on both sides of the copper strip through the upper and lower fuel injectors 3213. At the same time, the variable-frequency motor 315 starts synchronously, so that the movable pressure roller 312 and the fixed pressure roller 313 rotate synchronously to roll the copper strip. The rolled copper strip is removed from the discharge side. At this time, the upper oil scraper 3223 and the lower oil scraper 3224 scrape off the excess lubricating oil on the surface of the copper strip. Then, the infrared temperature sensor 342 and the laser distance sensor 343 measure the temperature and thickness of the copper strip respectively. The upper and lower groups of laser distance sensors 343 detect the distances between the upper and lower sides of the copper strip and the distances between the two groups of laser distance sensors 343 respectively, and then compare them according to the actual installation distances of the two groups of laser distance sensors 343 to calculate the thickness of the copper strip. Then, based on the multi-point thickness of the copper strip as a reference and combined with the multi-point temperature distribution of the copper strip, the parameter problems existing when the thickness of the copper strip does not meet the standard during the stretching process are judged. Then, the rotation speeds of the movable pressure roller 312 and the fixed pressure roller 313, the oil spraying speeds of the upper and lower fuel injectors 3213, and the downward pressure at both ends of the movable pressure roller 312 are adjusted adaptively to ensure that the thickness of the copper strip can meet the requirements;

[0090] And when scraping the lubricating oil, the lower oil scraper 3224 is provided with a plurality of vertical convex edges on its top, and the heights of the plurality of convex edges increase in a stepped manner along the direction away from the fixed pressure roller 313. This enables the lubricating oil to be scraped off gradually according to the thickness during actual scraping, avoiding the accumulation of lubricating oil due to one-time scraping and the inability to drain downward in time, resulting in the overflow of lubricating oil and causing pollution. At the same time, the plurality of convex edges are arranged at intervals so that drainage channels are formed between them, and both sides of the drainage channels are inclined downward, enabling the lubricating oil to be quickly discharged from both sides; the upper oil scraper 3223 also adopts a combination of multiple groups with increasing heights to scrape the lubricating oil on the surface of the copper strip in multiple layers step by step. At the same time, the middle part of the upper oil scraper 3223 is V-shaped, enabling the lubricating oil to naturally move to both sides, and using the drainage groove 3227 formed by the concave part on the upper oil scraper 3223 for the lubricating oil to flow. The middle part of the inner bottom of the drainage groove 3227 is thick and the two sides are thin, enabling the lubricating oil to be discharged more quickly to both sides at the inner bottom of the drainage groove 3227. And both ends of the upper oil scraper 3223 extend downward into the inner part of the oil collecting groove 3225, so that the lubricating oil on the top of the copper strip enters the inner parts of both sides of the oil collecting groove 3225 from both sides along the drainage groove 3227. Finally, the lubricating oil on both the upper and lower sides of the copper strip enters the lower oil hole 3226, and then is pumped out through the lubricating oil circulation filter tank 323. After filtering the lubricating oil, it is pumped out by the variable-frequency pump 3214 for recycling, which can maximize the avoidance of waste and pollution caused by the overflow of lubricating oil during the lubricating oil recovery process.

[0091] Embodiment 2

[0092] This embodiment discloses a method for a stretching device for copper strip processing, according to the attached Figures 1-15As shown, it includes the following steps;

[0093] Step 1: Unroll the copper strip coil through the uncoiler 1, and then the copper strip enters the stretcher 3 after being straightened by the straightener 2;

[0094] Step 2: Start the stretcher 3, add lubricant through the lubrication unit 32, and then the pressure roller rotates for roller pressing and stretching;

[0095] Step 3: The laser distance sensor 343 measures the thickness of the copper strip after stretching, and the infrared temperature sensor 342 measures the temperature of the copper strip after stretching;

[0096] Step 4: Adjust the roller pressing speed, downward pressure, and lubricant addition amount according to the thickness and temperature of the copper strip;

[0097] Step 5: The coiler 4 winds up the copper strip that has completed stretching;

[0098] In Step 4, preset the thickness thresholds Hmax and Hmin; the temperature thresholds Kmax and Kmin; and the maximum thickness difference threshold Ha and the maximum temperature difference threshold Ka; then measure multiple thickness values H1, H2... Hn through the laser distance sensor 343, and measure multiple temperature values K1, K2... Kn through the infrared temperature sensor 342, and then analyze the measured data; judge whether the multiple-point thickness is within the threshold range. If so, no action is taken; if not, proceed to the next judgment; judge whether the maximum thickness difference of multiple points is greater than Ha; if so, judge that the pressure is uneven, and at this time, increase the pressure on the side with the larger thickness through the hydraulic cylinder 314; if not, proceed to the next judgment; judge whether the multiple-point temperature is within the threshold range. If so, judge that the speed is too fast and reduce the motor power. If not, proceed to the next judgment; judge whether the maximum temperature difference is greater than Ka; if so, judge that the lubricant is insufficient and increase the lubricant amount;

[0099] In this judgment process, the thickness difference is not caused by a single variable of independent pressure, speed, or lubricant amount, but is manifested by temperature according to this thickness difference. It is judged that under this working condition, the influence weight of the target variable is the largest. By simply adjusting the weight of this variable, the effect of correcting the data can be achieved, without the need to adjust multiple variables, reducing the adjustment difficulty and control cost;

[0100] When it is finally judged that the temperature difference is less than Ka, it means that the overall complexity of the working condition reaches the highest at this time. Adjusting a single influencing variable cannot achieve data correction or will cause too much influence on other variables when correcting the data by adjusting a single variable; at this time, it is judged that there are abnormalities in both the pressure, speed, and lubricant amount. At this time, set the speed thresholds Vmax and Vmin; Pmax and Pmin based on the limited factors of material change during the copper strip stretching process; and then perform adaptive adjustment based on the non-linear coupling model;

[0101]

[0102] where the initial values are α = 0.05; β = 0.2; γ = 1.5; δ = 0.01; ε = 0.1;

[0103] The constraint conditions are Vmin ≤ V ≤ Vmax; Pmin ≤ P ≤ Pmax; L > 0; Based on this, the speed, pressure, and lubricant addition amount are dynamically and adaptively adjusted according to the target thickness difference to be adjusted.

[0104] In the above model; αV 2 is the speed term, indicating that an increase in speed leads to unstable material flow and the thickness non-uniformity increases quadratically; βP 2 is the pressure term, indicating that an increase in pressure exacerbates local deformation and non-linearly increases Δh; is the reciprocal term of the lubricant, indicating that when the lubricant is insufficient, Δh increases significantly; an increase in L can relieve friction; δL 2 is the quadratic term of the lubricant, indicating that excessive lubrication leads to an overly thick lubricating film, which is instead unfavorable for uniformity and forms a U-shaped curve; is the coupling term, indicating that the synergistic effect of high speed and high pressure exacerbates the overall thickness non-uniformity, but the lubricant can weaken this effect;

[0105] Based on the above functional relationships, first, considering the problems of the individual effects of speed, pressure, and lubricant addition amount on the thickness during the copper strip stretching process, and second, comprehensively considering the combined effects of these three variables of speed, pressure, and lubricant addition amount on other variables when they change. Thus, based on this theoretical basis, when the gap Δh between the actual stretching thickness and the target thickness of the copper strip is within different numerical ranges, the values of α, β, γ, δ, and ε need to be further dynamically adjusted in combination with experimental data

[0106] where α is the coefficient of the speed square term, and its value range is 10 -3 ~10 -1 ; it represents the plastic flow characteristics of the material and the inertia effect of the equipment;

[0107] β is the coefficient of the pressure square term, and its value range is 10 -2 ~10 0 , and it represents the die stiffness and the yield strength of the copper strip;

[0108] γ is the coefficient of the reciprocal term of the lubricant, and its value range is 10 -1 ~10 1 , and it represents the friction coefficient and the lubricant viscosity;

[0109] δ is the coefficient of the quadratic term of the lubricant, and its value range is 10 -3 ~10-1 , which represents the hydrodynamic effect when there is an excessive amount of lubricant;

[0110] ε is the coefficient of the velocity-pressure coupling term, and its value range is 10 -2 ~10 0 , which represents the process synergy effect and the dynamic stability of the lubricating film;

[0111] Among them, α and ε are highly sensitive coefficients. During the dynamic adjustment process, priority should be given to adjusting these coefficients.

[0112] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. The stretching equipment for copper strip processing, comprising an uncoiler (1), a straightener (2), a plurality of stretching machines (3), a coiler (4) and a controller (5) for collaborative control, which are connected in sequence, and is characterized in that, The stretching machine (3) includes; A stretching unit (31), in which a movable pressure roller (312) and a fixed pressure roller (313) are arranged. Hydraulic cylinders (314) are installed at the tops of both ends of the movable pressure roller (312) for adjusting the pressure between both ends of the movable pressure roller (312) and the fixed pressure roller (313), and variable-frequency motors (315) for driving are respectively installed on the movable pressure roller (312) and the fixed pressure roller (313); A lubrication unit (32), which includes an oil filling assembly (321) arranged on the feeding side of the stretching unit (31) and an oil scraping assembly (322) arranged on the discharging side of the stretching unit (31). A variable-frequency pump (3214) is installed on the oil filling assembly (321), and a lubricating oil circulating and filtering tank (323) is installed between the oil filling assembly (321) and the oil scraping assembly (322) for lubricating oil circulating and filtering; A cleaning and polishing unit (33), which is installed on the stretching unit (31) for automatically polishing and cleaning surface impurities when the movable pressure roller (312) and the fixed pressure roller (313) rotate; A monitoring unit (34), which is installed on the discharging side of the stretching unit (31). By monitoring the thickness and temperature of the copper strip after stretching, the hydraulic cylinder (314), the variable-frequency motor (315) and the variable-frequency pump (3214) are controlled to adjust the pressure, speed and lubricant addition amount.

2. The stretching device for copper strip processing according to claim 1, characterized in that: The stretching unit (31) includes a frame (311) and a motor controller (316) installed on one side of the frame (311). The movable pressure roller (312) and the fixed pressure roller (313) are both controlled and connected to the motor controller (316); An N-shaped frame (317) is movably arranged at the inner top of the frame (311). The movable pressure roller (312) is rotatably connected in the N-shaped frame (317). The hydraulic cylinder (314) is fixedly arranged at the top of the frame (311), and its output shaft is movably hinged to the N-shaped frame (317).

3. The stretching device for copper strip processing according to claim 2, characterized in that: A coolant circulator (318) is arranged on one side of the frame (311). Cooling channels are respectively installed inside the movable pressure roller (312) and the fixed pressure roller (313). The coolant circulator (318) is respectively communicated with the two groups of cooling channels to circulate and cool the movable pressure roller (312) and the fixed pressure roller (313).

4. The stretching device for copper strip processing according to claim 2, characterized in that: The number of the cleaning and polishing units (33) is two groups. One group of the cleaning and polishing units (33) is installed on the N-shaped frame (317), and the other group of the cleaning and polishing units (33) is installed at the inner bottom of the frame (311); The cleaning and polishing unit (33) includes a contact cover (331) and a plurality of scrapers (334) fixedly arranged inside the contact cover (331). Contact ports (332) and slag discharge ports are respectively arranged on both sides of the contact cover (331). A slag receiving box (333) is installed on the outer wall of the slag discharge port through bolts; Both sides of the scraper (334) are respectively located in the contact port (332) and the slag discharge port, and the side of the scraper (334) facing the slag discharge port is inclined downward; the multiple scrapers (334) are arranged at intervals so that an inclined downward slag discharge channel is formed between the multiple scrapers (334).

5. The stretching device for copper strip processing according to claim 1, characterized in that: The oil filling assembly (321) includes a fixed oil filling seat (3211) and a movable oil filling seat (3212); the oil scraping assembly (322) includes a fixed oil scraping seat (3221) and a movable oil scraping seat (3222); In the middle of the opposite sides of the fixed oil filling seat (3211) and the movable oil filling seat (3212), injection nozzles (3213) densely arranged are installed. There are two groups of variable frequency pumps (3214), which are respectively fixedly arranged between the two groups of injection nozzles (3213) and the lubricating oil circulation and filtration tank (323); In the middle of the opposite sides of the fixed oil scraping seat (3221) and the movable oil scraping seat (3222), a lower oil scraping member (3224) and an upper oil scraping member (3223) are respectively arranged. Both the upper oil scraping member (3223) and the lower oil scraping member (3224) are made of flexible materials; the lower oil scraping member (3224) and the upper oil scraping member (3223) respectively scrape the upper and lower sides of the copper strip and make the lubricating oil enter the inside of the fixed oil scraping seat (3221). A return pump is installed between the inner bottom of the fixed oil scraping seat (3221) and the lubricating oil circulation and filtration tank (323); The monitoring unit (34) is fixedly installed on the fixed oil scraping seat (3221) and the movable oil scraping seat (3222).

6. The stretching device for copper strip processing according to claim 5, characterized in that: On both sides of the movable oil filling seat (3212) and the movable oil scraping seat (3222), connecting hanging strips (324) are fixedly arranged. A chute is opened on the inner side wall of the frame (311), and an elastic member (325) is fixedly arranged at the bottom of the chute. The top end of the elastic member (325) is fixedly connected to the inner side of the top end of the connecting hanging strip (324). A pressing rod (326) is arranged at the outer top of the connecting hanging strip (324), and the pressing rod (326) is fixedly connected to the N-shaped frame (317).

7. The stretching device for copper strip processing according to claim 5, characterized in that: The monitoring unit (34) includes a fixed bracket (341) fixedly arranged on the outer walls of the fixed oil scraping seat (3221) and the movable oil scraping seat (3222). A plurality of infrared temperature sensors (342) and laser distance sensors (343) are fixedly installed in the fixed bracket (341). A plurality of reinforcing ribs (344) are integrally formed on the fixed bracket (341).

8. The stretching device for copper strip processing according to claim 5, wherein: An oil collecting groove (3225) is opened at the top of the fixed oil scraping seat (3221). Both sides of the oil collecting groove (3225) are inclined downward, and an oil drain hole (3226) communicating with the inside of the fixed oil scraping seat (3221) is opened at the end of the downward inclination. The lower oil scraping member (3224) is fixedly arranged in the middle of the oil collecting groove (3225); A plurality of vertical convex ridges are arranged at the top of the lower oil scraping member (3224), and the heights of the plurality of convex ridges increase step by step along the direction away from the fixed pressing roller (313). The plurality of convex ridges are arranged at intervals so that an oil drainage channel is formed between two adjacent convex ridges, and both sides of the oil drainage channel are inclined downward; The number, position of the upper oil scraping member (3223) correspond one by one to those of the lower oil scraping member (3224), so that the number of the upper oil scraping members (3223) and the lower oil scraping members (3224) support each other relatively to avoid contact extrusion and deformation of the copper strip. The lower edge heights of multiple groups of the upper oil scraping members (3223) decrease step by step along the direction away from the fixed pressure roller (313).

9. The stretching device for copper strip processing according to claim 8, characterized in that: One side of the upper oil scraping member (3223) facing the fixed pressure roller (313) is recessed inward to form an oil drainage groove (3227) for the lubricating oil to flow. The middle part of the upper oil scraping member (3223) protrudes towards the fixed pressure roller (313), so that the middle part of the upper oil scraping member (3223) is V-shaped. Both sides of the upper oil scraping member (3223) incline downward and extend into the oil collecting groove (3225). Both sides of the bottom edge of the oil drainage groove (3227) in the middle part of the upper oil scraping member (3223) incline downward.

10. The method of the stretching equipment for copper strip processing according to any one of claims 1-9, characterized in that: It includes the following steps; Step 1: Unroll the copper strip coil through the uncoiler (1), and then the copper strip enters the stretcher (3) after being straightened by the straightener (2). Step 2: Start the stretcher (3), add lubricant through the lubrication unit (32), and then the pressure roller rotates for roll pressing and stretching. Step 3: The laser distance measuring sensor (343) measures the thickness of the copper strip after stretching, and the infrared temperature measuring sensor (342) measures the temperature of the copper strip after stretching. Step 4: Adjust the roll pressing speed, downward pressure and lubricant addition amount according to the thickness and temperature of the copper strip. Step 5: The coiler (4) winds up the copper strip that has completed stretching. In Step 4, preset the thickness thresholds Hmax and Hmin; temperature thresholds Kmax and Kmin; and the maximum thickness difference threshold Ha and the maximum temperature difference threshold Ka; Then measure multiple point thickness values H1, H2…Hn through the laser distance measuring sensor (343), measure multiple point temperature values K1, K2…Kn through the infrared temperature measuring sensor (342), and then analyze the measured data. Judge whether the thickness at multiple points is within the threshold range. If so, no action is taken; if not, proceed to the next judgment. Judge whether the maximum thickness difference at multiple points is greater than Ha; if so, judge that the pressure is unbalanced, and at this time, increase the pressure on the side with the larger thickness through the hydraulic cylinder (314); if not, proceed to the next judgment. Judge whether the temperature at multiple points is within the threshold range. If so, judge that the speed is too fast and reduce the motor power. If not, proceed to the next judgment. Judge whether the maximum temperature difference is greater than Ka; if so, judge that the lubricant is insufficient and increase the lubricant amount; if not, judge that there are abnormalities in the pressure, speed and lubricant amount. At this time, set the speed thresholds Vmax and Vmin; Pmax and Pmin based on the influencing factors restricted by the material change during the copper strip stretching process; Then perform adaptive adjustment based on the non-linear coupling model; Where the initial values are α = 0.05; β = 0.2; γ = 1.5; δ = 0.01; ε = 0.1; Constraints: Vmin ≤ V ≤ Vmax; Pmin ≤ P ≤ Pmax; L > 0; Based on this, the speed, pressure, and lubricant addition amount are dynamically and adaptively adjusted according to the target thickness difference to be adjusted.

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